Device for pulling the skin and cosmetic treatment method

The present invention relates to devices for altering the appearance of the body or of the face.

Ageing gives rise to unattractive changes to the shape of the face and neck.

Broadly speaking, these changes can be divided between three phenomena.

First, the tissue made up of the skin, the skin muscles and, in general, a layer of fat, becomes wrinkled because its overall surface area is too great in comparison with the region it is covering. This can be due to a hollowing or thinning of the face and/or the neck or to a phenomenon involving a change to the tissue.

Second, the tissue weakens. This phenomenon, known as ptosis, can be associated with a relaxation of certain points of attachment of the skin. The surface drops downwards under gravity.

Third, the tissue of the skin is tightened by a filling-out of the face and/or neck. The filling-out may, for example, be the result of a weight gain or of an upsetting of circulation, for example lymphatic, functions, or of certain glands such as the thyroid.

The underneath of the chin is often affected by the second phenomenon, leading to unsightly effects that are almost impossible to treat without resorting to cosmetic surgery.

The front of the neck is often affected by the first phenomenon, with an unattractive folded appearance developing. This phenomenon may be the result of weakening.

The third phenomenon can be fairly significant in some instances, going so far as to limit or completely remove the curve of the neck, thus impairing the overall look of the head and neck region.

These three phenomena are likely to affect the face also, in various places.

The second phenomenon may more particular affect the regions near the jawbones, including the outline of the mouth, and the cheeks, the weakening not being the same everywhere, being notably more pronounced between fairly distant muscle anchor points. This is why it affects the jawbone region more than it does the chin region, accentuating the visual effect on the oval of the face.

The third phenomenon may affect the entire face, except generally the forehead. It may give the eyes a puffy appearance, fill out the cheeks, and accentuate the nasogenian crease. It is very difficult to. treat these defects using conventional cosmetic approaches.

Cosmetic surgery techniques such as neck and face lift or cosmetic medicine such as the filling of fine lines and wrinkles, liposuction, heat treatment, laser skin tightening or Botox injections provide only partial solutions. In addition, they often cause fear and apprehensivcness because of their invasive nature and because of the discomfort they can cause; these methods arc generally not considered to be acceptable solutions by people awaiting treatments for these forms of ageing.

The application of a coloured or concealing coating, such as a foundation, may deal with the first phenomenon, but because it acts on the surface finish rather than on the volume this solution is still ill suited to the treatment of the second and third phenomena.

Even in respect of the first phenomenon its effectiveness is limited where fine lines and wrinkles are more pronounced.

The application of a coating which, as it dries, shrinks, such as products known as "skin tighteners", is effective to an extent against the first phenomenon, if the fine lines and wrinkles are moderate, but remains insufficiently effective in respect of the second and third phenomena.

The technique that involves pulling the skin to reshape it is known. In particular, the hair may be pulled back and fastened in a plait, a ponytail or a bun for example. That pulls on the skin and is quite effective at pulling the skin around the eyes but still remains fairly ineffective in improving the appearance of the neck and most of the surface of the face.

It is also possible to affix a film to the skin in order to pull it.

Figure 1 depicts a film stuck at one end near a region with wrinkles, which region is delimited by dotted lines, and which is then pulled and stuck down at the other end to an anchorage region near the temples. The tensile force applied to the wrinkly region causes an elastic reaction force which is transferred to the anchorage region. The forces oppose one another and the skin forms folds under the film. The folds that are formed extend beyond the film, as illustrated.

While this technique is able to alter the shape of the skin and counter the effects of relaxation, it does, however, have the disadvantage that the skin folds it causes are unattractive.

It is in theory possible to use this solution to eliminate fine lines and wrinkles at a visible location provided that the folds that are formed are formed somewhere else which is not visible. This technique cannot, in practice, be used on the face, because the anchor points needed to resist the return forces are situated around the edges of the face.

This problem can be overcome if the pull extends beyond the anchorage region of the edges of the face, and therefore into the scalp or the region of the ear. However, the effect of this pull is weak because the region around the edges of the face resists this pull. It is effective only in the region situated near the outside edges of the eyes because at this point the anchorage region has a certain mobility if pulled outwards. However, at this point, the fine lines and wrinkles tend to be horizontal and are relatively insensitive to the effect of being pulled in the horizontal direction.

The pull that has to be applied in order to lift the skin in the region of the jawbone requires an anchor point near the cheekbones in order to create a vertical pull. The folds that form in the intermediate region between the jawbone and the cheekbones by sticking a film here are highly visible.

The aforementioned first phenomenon also occurs on the entire front face of the neck. It may be very pronounced in the region of the sternal notch which may appear as one of the most wrinkled regions. When the neck is not stretched, the heads of the sternocleidomastoidien muscles are relaxed, making the folds in the region of the sternal notch and possibly of the Sedillot triangle even more prominent.

Effective application of a film to this region in order to limit the effect of the first phenomenon is difficult to achieve because of the mobility of the entire region and because of the protrusion of the prominence of the sternoclei domastoidien muscles. It is also difficult to find an anchorage region via which to create a pulling effect. By adopting an anchorage region situated further back, a great deal of folds are created.

The ageing of the neck also gives rise to effects corresponding to the second phenomenon and which may become very pronounced. These are perceived as one of the greatest signs of ageing. Sagging of the skin and of the tissue situated immediately under the chin is noted, thus preventing the chin from appearing straight. In addition, it leaves the sternocleidomastoidien muscles protruding, as well as the two external jugular veins, even when these are not under tension.

Using a film to combat the second phenomenon in the neck region entails pulling upward or at an angle in the direction away from the chin. An anchor point in the mastoid region can be selected to compensate for the elastic return force of the skin and the force of gravity. In both cases, the result is accompanied by the creati on of unattractive folds. In general, the folds may adopt various shapes according to the pull applied and the strength of the skin. A low pulling force combined with strong skin causes only a few stretched out folds. That is because the lines of traction extend fairly far beyond the film. A weak pulling force combined with skin of low resistance causes extensive folding. This is because the traction lines do not extend far beyond the ffitlL

It is the oldest skins that present the greatest problem because they tend to have a great deal of excess skin, which means that the pull that has to be applied is great and creates pronounced folding in the part of the skin that is under the film. In addition, the skin is not strong and so the extensive folds are great.

Publication US 2008/0228217 describes a film that can be attached by its two ends, particularly behind the neck. The film comprises three parts, namely two attachment ends and a non-stick central part. The system may comprise a buckle for tightening or for adjusting the tension.

Publication US 2003/0232069 describes a film which is adhesive on one side and supports a pealable backing on the other side.

Patent US 5 582 585 describes a system formed of adhesive attachment points that is fixed to the skin and an elastic film which rests on these attachment points. The system comprises a means of tightening or of adjusting the tension.

Patent US 5 555 900 describes a system formed of attachment points and of a film which rests on these attachment points. The system comprises a means of tightening and of fastening, allowing the tightening means to be removed following adjustment.

Patent US 5 116 675 describes a system formed of an elastic and non-stick central portion and of two inelastic but adhesive ends.

Applications US 2003/0108228, US 2003/0225345 and WO 02/096292 describe the application of adhesive supports to the skin and their analysis following removal in order to determine the properties of this skin.

Patent US 3 1 19 389 describes a strip comprising an internal face furnished with two adhesive regions at its ends and which are intended to be applied to the skin, and an external face intended to allow a decorative necklace to be attached.

^■ Patents US 3 885 559 and US 2 399 545 describe adhesive tapes comprising an alternation of adhesive regions and of non-stick regions.

Patent US 3 425 412 describes a tape furnished with a transparent central part to allow observation of a wound, and with two adhesive lateral parts for affixing the tape to the skin.

Patent US 5 585 178 describes adhesive strips made with adhesives that have different properties and are arranged in alternation along the strip. Application WO 03/017866 describes a bandage intended to be applied to the human body and comprising two adhesive regions at its ends and a non-stick central region.

Application WO 00/51536 describes the application of patches to the face, in the region of the cheekbones, in order to reduce the appearance of wrinkles.

Application US 2009/117825 describes a cosmetic strip produced to reduce the degree of ptosis in the decolletage region of a woman's chest, the strip comprising two adhesive sections separated by a non-stick section and a part for detaching the strip.

Application US 2004/043059 describes patches intended to be positioned under the eyes and comprising a strip allowing the skin not to be deformed.

None of the systems described in these patents and patent applications are entirely satisfactory in treating the skin and pulling it without generating extensive folds.

The invention seeks to improve the treatment of the skin further so as to address the disadvantages mentioned above, and more particularly seeks to treat the first and/or second phenomena mentioned hereinabove, in a discreet and aesthetic way. First subject

In a first of its aspects, one subject of the invention is a device for pulling the skin, comprising:

a pulling part designed to pull in a direction of pulling, this pulling part comprising at least three adhesive regions alternating in the direction of pulling with non-stick or less adhesive regions, particularly on its face intended to come into contact with the skin.

What is meant by "less adhesive regions" is regions with lower, for example ten or more times lower, detachment pressure.

The pulling part may comprise a plurality of adhesive segments each elongated in a direction perpendicular to the direction of pulling.

The pulling part may comprise a succession of adhesive spots in the direction of pulling and in a direction perpendicular to the direction of pulling. In other words, the pulling part may comprise a succession of adhesive segments which are discontinuous in a direction perpendicular to the direction of pulling.

One dimension of the adhesive regions in the direction of pulling may range between 1 and 5 mm, preferably between 1.5 and 2.5 mm. The width of the pulling part ranges for example between 1 and 20 mm or more, the width being measured in a direction perpendicular to the direction of pulling. The length of the pulling part ranges for example between 0.1 mm and 5 mm.

The pulling part ay have a rectangular or some other shape.

The pulling part may be produced without perforation.

The adhesive regions may be identical or non-identical. Each adhesive region extends for example over at least 1 mm'.

Two adjacent adhesive regions may be separated, in the direction of pulling, by a distance ranging between 0.1 and 20 mm, preferably of 0.5 to 8 mm.

The pulling part preferably comprises at least one elastically deformable portion being, for example, entirely elastically deformable or partially elastically deformable. The pulling part may comprise an alternation of regions with different rigidities and/or elasticities.

The pulling part may have a thickness which varies in the direction of pulling.

The capacity for elongation of the pulling part may range between 10 and

2000%.

The pulling part may comprise an alternation of elastically deformable segments and of segments of lower elasticity or which are inelastic.

The elastically deformable segments may be adhesive or non-stick.

The number of adhesive regions in the direction _. of pulling ranges for example between 3 and 100.

The adhesive of the adhesive regions preferably has a detachment pressure of 1000 Pa or higher. Measurements are taken under tensile stress at a constant rate (0.1 mm/s). The force necessary to pull the adhesive off is measured.

The adhesive or non-stick regions may have reliefs protruding towards the skin, for example in the form of bosses or ribs.

The adhesive regions may be defined by adhesive segments which are inelastic or of lower elasticity and the non-stick regions by segments which are elastic but non-stick.

The non-stick elastic segments are, for example, entirely devoid of adhesive. As an alternative, they comprise an adhesive which has been rendered inactive because it has been covered by a non-stick compound, for example an elastic film or a powder.

The adhesive regions may, as an alternative, be defined by elastic adhesive segments and the non-stick regions may be defined by non-stick segments which are inelastic or of lower elasticity. The non-stick segments which are inelastic or of lower elasticity are, for example, obtained by sticking pieces of inelastic film onto an adhesive film which elsewhere defines the elastic adhesive segments. The adhesive regions may, as an alternative, be defined by elastic adhesive segments and the non-stick regions may be defined by elastic non-stick segments.

The device may comprise at least one stress-relief part arranged on at least one side of the pulling part, coming into contact with the skin and configured to pull on the skin less than does the pulling part or even not to pull on the skin. The presence of at least one stress-relief part makes it possible to reduce the visibility of the folds still further.

The device preferably comprises two stress-relief parts arranged one on , each side of the pulling part. The or each stress-relief part may have a variable or constant width. The or each stress-relief part may have at least one adhesive region to adhere to the skin. The or each stress-relief part may be non-stretch, for example being non-elastomeric. The or each stress-relief part may be initially pleated and deployable in the direction of pulling. The or each stress-relief part may extend over at least one quarter, or better still at least half, or even the entire length of the pulling part,

A further subject of the invention is a cosmetic treatment method in which a device as defined hereinabove is applied to the skin in order to stretch it.

Second subject

In another of its aspects, a subject of the invention is a device for pulling the skin comprising:

a pulling part comprising at least two adhesive portions distant from one another in a direction of pulling,

at least one stress-relief part arranged on at least one side of the pulling part, coming into contact with the skin and being configured not to pull on the skin or alternatively to pull on the skin less than does the pulling part.

"Arranged on one side of the pulling part" is to be understood to mean extending on one same side of the pulling part beyond a straight line tangential to one same side of the regions of attachment to the skin, between which regions the pulling force is applied once the device is in place on the skin in order to perform its pulling function.

The device preferably comprises two stress-relief parts positioned one on each side of the pulling part.

The or each stress-relief part may have a variable or constant width.

The or each stress-relief part may have at least one adhesive region to adhere to the skin. The or each stress-relief part may be non-stretch, for example being non-elastomeric.

The or each stress-relief part may initially be pleated and deployable in the direction of pulling.

The or each stress-relief part may extend over the entire length of the pulling part, or even over the entire length of the device. In one example, the pulling part extends wholly between two stress-relief parts positioned one on each side of the pulling part.

The pulling part is preferably in the form of a single strip, which may be of constant width, for example ranging between 1 and 20 mm.

The pulling part may be continuously adhesive between said adhesive portions. As a alternative and for preference, the adhesive portions are disjointed.

The palling part is preferably elastically deformable, and may be so either uniformly or otherwise.

A further subject of the invention is a cosmetic treatment method in which a device as defined hereinabove is applied to the skin. The pulling part may be stretched out before it is affixed to the skin. The pulling force for example ranges between 0.1 and 50 N.

The stress-relief part or parts may be applied to the skin at the same time as the pulling part. As an alternative, the stress-relief part or parts are applied to the skin after the pulling part has been affixed to the skin.

The device may be covered by a makeup composition as appropriate.

Third subject

In another of its aspects, one subject of the invention is a skin cosmetic treatment method in which:

a region of skin is pretreated to alter its firmness and/or its behaviour towards an adhesive and/or its adhesive properties,

a film that adheres to the skin is applied to or formed on the skin, this film at least partially covering the pretreated region or being positioned adjacent thereto.

What should be meant by "positioned adjacent thereto" is that it is positioned close enough that the pretreatment has an impact visible to the naked eye on the effect of the film. For example, the distance between the pretreated region and the film may be less than 10 mm, for example may range from 1 to 10 mm. When the adhesive properties of the skin are altered, at least two, or better still at least three, regions are formed which have different adhesive properties and which are at least partially covered by the film. It is thus possible to form on the skin for example at least two or three adhesive or non-stick segments.

When the firmness of the skin is altered, at least one region of improved firmness is created on the skin, or better still, a plurality of disjointed regions of improved firmness are created.

The pretreatment alters the effect that the pull of the film will have on the skin, allowing this film to apply its force to the skin in a way that will reduce the appearance of unattractive folds.

The skin may be pretreated by creating multiple non-stick and/or firm regions and then an adhesive film may be applied. The non-stick and/or firm regions alter the effect that the film has on the skin, allowing it to apply its pulling force in a better way.

The stretching of the skin may alter the condition of the skin in order to limit the extent of the aforementioned first and second phenomena. The pretreatment of the skin may be aimed at breaking up the action of the film so that it has a greater effect on certain parts of the skin and at making the skin less inclined to pucker by giving it greater mechanical strength.

The pretreatment may be carried out in such a way that the pulling force of the film is concentrated on the natural fine lines and wrinkles of the skin. The pretreatment may be situated in such a way as to target or avoid certain features in the skin, for example

fine lines and wrinkles, scars, pores, etc.

blemishes, blackheads,

spots, raised regions, etc.

The film may at least partially cover the pretreated region, for example may cover at least 50% of the pretreated region or even 100% thereof.

The pretreatment may occur at at least two disjointed places on the skin which are spaced apart, for example as a succession of segments separated from one another.

The film may be adhesive and the pretreatment may comprise applying a non-stick coating to the skin, for example in a succession of segments. Thus, the film at least partially covers the non-stick coating.

The film may be continuously adhesive, preferably elastically deformable and continuously adhesive. The pretreatment of the skin may comprise applying an adhesive to the skin in a pattern, notably in several spaced-apart segments. The film which is then applied to the skin may be adhesive or non-stick.

The pretreatment may comprise applying to the skin at least one coat of a non-stick coating in a pattern, notably in several segments spaced apart. In this case, the film is adhesive and preferably elastically deformable.

The pretreatment of the skin may comprise applying to the skin at least one element that alters the firmness of the skin. For example, several skin firming segments are formed on this skin or applied to this skin.

The pretreatment may pull the skin and the film sustain this pull. In this case, the film is preferably inextensible.

The film may be elastically deformable.

The film may be formed by the in-situ application of a film-forming composition.

The pretreatment may comprise applying a continuous coat of adhesive to the skin then applying a firming or non-stick element or compound to this coat of adhesive.

The pretreatment may comprise applying a plurality of adhesive segments to the skin.

The pretreatment may comprise applying a plurality of rigid segments to the skin.

The pretreatment may comprise applying a plurality of rigid and non-stick segments to the skin and the method may comprise applying an elastically deformable film to the region thus pretreated.

The pretreatment may comprise applying a pretreatment means to the skin, giving the skin firmness, and the method may comprise applying an elastically deformable film near the pretreatment means but without covering it. As an alternative, the film covers the pretreatment means.

The pretreatment may comprise applying a pretreatment means that confers firmness to the skin and the method may comprise applying a film to the pretreatment means, without completely covering it.

The pretreatment may or may not create a pull on the skin. When the pretreatment creates a pull on the skin, the film may sustain the pull applied during the pretreatment, or even apply a greater amount of pull.

In another of its aspects, a further subject of the invention is a skin cosmetic treatment kit comprising:

a) an adhesive film to be applied to the skin or a film-forming composition capable of forming a film able to pull on the skin, b) a means of prehearing the skin chosen, for example, from compositions that alter the adhesive properties of the skin and/or its firmness and films that firm the skin or alter its adhesive properties.

Components a) and b) of the kit may be offered to the user within one and the same package.

The kit may, as appropriate, comprise an applicator member or tool for applying the pretreatment means in a preset pattern, for example a succession of spaced-apart segments.

In order to combat the first phenomenon mentioned hereinabove, the direction of pulling of the pulling part is preferably directed in the direction orthogonal to the orientation of the fine lines or wrinkles, for example horizontally, and in order to counter the second phenomenon, the direction of pulling is preferably oriented in the direction orthogonal to the direction of relaxation, for example vertically.

The invention makes it possible to alter the shape of the face or neck by pulling, at the same time reducing the formation and/or visibility of undesirable folds.

The invention may make it possible more particularly to treat the ageing of the face and of the neck.

The pulling part, notably the adhesive and/or non-stick segments, and/or the film may be at least partially transparent or may even be completely transparent.

The invention may be better understood from reading the detailed description which will follow of some exemplary nonlimiting embodiments thereof and from studying the accompanying drawing in which:

Figure 1 , which has already been described, illustrates the prior art, Figure 2 depicts, in a view from beneath, one example of a device according to the first subject of the invention,

Figure 3 depicts, schematically and in longitudinal section, one example of a pulling part before and after stretching,

Figure 4 illustrates the effect on the skin of the pulling part of Figure 3 ,

Figures 5 and 6 illustrate, schematically and in partial longitudinal section, two other examples of pulling parts,

Figures 7 and 8 depict two of many examples of how adhesive regions may be arranged on the pulling part,

Figure 9 is a view similar to Figure 3 of a pulling part according to another embodiment of the invention, before and after stretching, Figure 10 is a view similar to Figure 4 illustrating the effect of the device of Figure 9 on the skin,

Figures 11 and 12 are views similar to Figures 5 and 6 of alternative forms of the pulling part,

- Figure 13 depicts, in a view from beneath, an alternative form with stress-relief parts,

Figure 14 is a cross section on XIV-XIV of Figure 13,

Figures 15 and 16 are views similar to Figure 13 of alternative forms of embodiment,

- Figure 17 is a cross section on XVIT-XViT of Figure 16,

Figure 18 is a view similar to Figure 13 of another alternative form of embodiment,

Figure 19 is a partial and schematic perspective view of another exemplary embodiment,

- Figure 20 is a partial and schematic longitudinal section on XX-XX of

Figure 19,

Figure 21 depicts, in perspective from above, another exemplary embodiment,

Figure 22 is a cross section on ΧΧΠ-ΧΧΪΙ of Figure 21 ,

- Figure 23 depicts, in a view from above, another example of a device according to the first subject of the invention,

- Figure 23A is a section on ΧΧΓΠΑ-ΧΧΠΙΑ of Figure 23 ,

Figures 23B and 23C are views similar to Figure 23 A, of alternative forms of embodiment,

- Figure 24 is a view similar to Figure 13 of another alternative form of embodiment,

Figure 25 is a partial and schematic longitudinal section on XXV-XXV of Figure 24,

Figure 26 illustrates the use of a device according to the first subject of the invention on the arm,

Figures 27 and 28 are longitudinal schematic and partial sections of other examples of devices produced according to the first subject of the invention,

Figure 29 depicts, in a view from beneath, one example of a device according to the second subject of the invention,

- Figures 30 and 31 are cross sections on IfX-XII and IV-IV of Figure 29, respectively,

Figures 32 to 35 are views similar to Figure 29, of alternative forms of embodiment, Figure 36 is a cross section on DC-DC of Figure 35,

Figure 37 is a view similar to Figure 29, of another alternative form of embodiment,

Figure 38 is a partial and schematic perspective view of another exemplary embodiment,

Figure 39 is a partial and schematic longitudinal section on ΧΠ-ΧΠ of

Figure 38,

Figure 40 is a perspective depiction of another exemplary embodiment, Figure 41 is a cross section on XIV-XIV of Figure 40,

- Figure 42 depicts, in a view from above, another example of a device according to the invention,

Figure 43 is a partial and schematic longitudinal section on XVI-XVI of Figure 34B,

Figure 44 is a cross section illustrating an alternative form of embodiment of the invention,

Figures 47 A to 47C illustrate the application of an example of a device according to the second subject of the invention to the skin,

- . Figures 48A to 48C are views similar to Figures 47A to 47C, for a different result on the skin,

- Figures 49A and 49B are figures similar to Figures 47A to 47C, for a different result on the skin,

Figure 50 depicts schematically and in longitudinal section one example of a pulling part before and after stretching,

Figure 51 illustrates the effect on the skin of the pulling part of Figure 50,

Figures 52 and 53 illustrate partially and schematically in longitudinal section two other examples of pulling parts,

Figures 54 and 55 depict two of many examples of arrangements of adhesive regions on the pulling part,

- Figure 56 is a view similar to Figure 50 of a pulling part according to another exemplary embodiment of the invention,

Figure 57 is a view similar to Figure 51 illustrating the effect of the device of Figure 56 on the skin,

Figures 58 and 59 arc views similar to Figures 52 and 53 of alternative forms of embodiment of the pulling part,

Figure 60 illustrates the use of the device of the arm, Figures 61 and 62 are schematic and partial longitudinal sections of other examples of pulling parts produced in accordance with the second subject of the invention,

Figure 63 is a perspective depiction of one example of a film, separately,

Figures 64 to 66 illustrate examples of pretreatment,

Figures 67A to 67C and 68A to 68C illustrate other examples of pretreatment, and

Figures 69 to 71 illustrate examples of how the film can be positioned in relation to the pretreated region.

The skin movements desired through use of the invention can vary according to circumstance. For example, they range between 2 mm and 5 mm for a treated skin length of 10 mm. Thus, if a skin length of 5 cm, for example under the chin, is to be treated, one might seek to cause the skin to move by 1 cm to 2.5 cm.

First subject

Figure 2 depicts one example of a device 10 according to the invention.

This device consists of a pulling part 11 which is elongated along an axis X which coincides with the direction in which the device pulls on the skin. As an alternative, the device 10 may, as described later on, comprise at least one stress- relief part.

Pulling part

The pulling part 11 comprises a flexible film 20 which is coated with adhesive 19 on its face intended to come into contact with the skin in order to define several regions of attachment 13 with the skin.

The fil 20 may be continuously elastically deformable but may equally have differing elastic properties, notably according to the location along the axis X, as described later on.

As illustrated in Figure 2, the pulling part 1 1 is covered with the adhesive

19 nonuniformly and comprises sections 23, in the longitudinal direction, which are not covered with adhesive. For example, the pulling part 11 comprises an alternation of adhesive sections 24 and of non-stick sections 23, from one longitudinal end to the other. The presence of non-stick sections 23 allows the skin to slip locally relative to the device 10, and thus reduce the formation of pronounced folds. The width W of an adhesive section 24 ranges for example between 1 and 20 mm. The length L of an adhesive section 24 for example ranges between 0.1 and 5 mm.

In order to create a non-stick section it is possible for adhesive not to be applied locally. It is also possible for the adhesive to be covered with an element or compound which affects its adhesion, for example which cancels it.

The pulling part 11 may have varyious configurations without departing from the scope of the present invention.

The pulling part 11 may be produced with an extensile or inextensilc film or with a film that breaks up the pull over several regions through the effect of using segments which are differentiated either in terms of elasticity or in terms of adhesion as above, or both.

In this situation, there are three possible configurations:

a) the non-stick segments are elastic and the adhesive segments are inelastic,

b) the non-stick segments are not elastic and the adhesive segments are elastic,

c) the adhesive segments and the non-stick segments are elastic.

What is meant by segments which are inelastic is segments which arc inelastic or which are markedly less elastic than the segments termed elastic.

The inelastic segments are, for example, rigid, in the sense that under the pull applied by the user in order to stretch the skin, their length does not change visibly. For example, for the same pulling force, the elastic region stretches by 40% or more whereas the inelastic region stretches by less than 10%. The elastic modulus is, for example, four times higher.

In all three cases, the succession of differentiated segments means that the skin can be made to fold into a given shape and, in particular, that the skin can be given folds which are broken down into multiple small and less visible folds.

Configuration a) above is preferred, because if the pull is concentrated over a given region and this region does not adhere to the skin, the skin is free to move and adopt the most favourable form. Otherwise, that is to say when the pulling region is adhesive, the skin is locked in the situation it adopted at the time of application. If unattractive folds have formed at this stage, they tend to be kept in this form.

Figures 3 and 4 illustrate the effect of a pulling part produced using an alternation of non-stick elastic segments 65 and of inelastic adhesive segments 66.

It may be seen that very small folds have formed under the non-stick elastic segments 65. If the elastic segments correspond to a combined length L _e for a total length L, the total extension E (in %) of the pulling part, which is concentrated in the elastic segments, leads to an extension of each segment by a factor greater than E.

Thus, each elastic segment experiences an extension E _e :

E _e =E.I-/L _e .

If, at the moment the forces are released, contraction is total, the contraction of the skin will be C _e :

C _c -1-(1/(1 +E _e )

namely

C _e -1-(1/(1+L _e (L. The small folds are concentrated under the non-stick elastic segments with a uniform distribution.

For a pulling part alternating non-stick elastic segments measuring 2 mm along the X axis with adhesive inelastic segments measuring 2 mm along the X axis and subjected to a total extension E of 20%, each segment of skin positioned under a non-stick elastic segment of the device is contracted by C _e ^™ 29%, namely about 580 um. Given the shape that a fold can adopt, this means that its width is around 1 mm, for a depth of 300 um. The length of the folding may be the width of the pulling part. It may also exceed the width of the pulling part. Because the depth is small (300 um), the extension beyond the width of the pulling part will be small. It will therefore be all the easier to conceal.

For a pulling part alternating 2 mm non-stick elastic segments with .1 mm adhesive inelastic segments and subjected to a total extension E of 20%, each segment of skin positioned under a non-stick elastic segment of the pulling part is contracted by C _c =25%, namely about 500 um. Given the shape that a fold can adopt, this means that its width is about 1 mm, for a depth of 250 um.

The elastic segments may be smaller. For a pulling part alternating non-stick elastic segments measuring 1 mm along the X axis with adhesive inelastic segments measuring 1 mm along the X axis and subjected to a total extension E of 20%, each segment of skin positioned under a non-stick elastic segment of the pulling part is contracted by C _e =29%, namely about 250 um. Given the shape that a fold can adopt, this means that it is about 500 um wide by 125 um deep. At this stage, the small skin folds that form barely extend beyond the width of the pulling part. Thus, the preferred solution in configuration a) is a high number of segments and a somewhat small width along the X axis of the non-stick elastic segments. The width along the X axis of the non-stick elastic segments is preferably chosen to be between 50 μη and 2 cm, preferably from 200 μ ^η ι to 5 mm.

The ratio of the width of the adhesive inelastic segments to the width of the non-stick elastic segments can vary from ¼ to 4/1.

The adhesive that defines the regions of attachment to the skin of the pulling part is preferably powerful so as to obtain effective attachment with adhesive inelastic segments of small width. Adhesion may (in terms of detachment pressure) be somewhere between 1 ,000 Pa and 1 ,000,000 Pa.

The non-stick elastic regions of the pulling part may be smooth or may have a shape that encourages the skin to mould into a folded shape. For example, as illustrated in Figure 5, the pulling part may comprise non-stick clastic segments that comprise one or more protrusions 68 protruding towards the skin. These protrusions 68 may be identical on each segment 65 or their number and/or shape may vary according to the location on the pulling part 11.

The protrusions 68 may be in the form of a bead, as illustrated in Figure 6, or ribs, as illustrated in Figure 5.

Moreover, the non-stick elastic segments are not necessarily all identical to one another. In particular, the width of the segments may vary from one point on the pulling part to another, the segments near the ends for example being narrower than those near the middle. The elastic return force may vary from one point to another. For example, the segments near the ends may be produced so that they exert a weaker elastic return force than those near the middle.

The distribution of the adhesive inelastic segments may be non-uniform. The density of the adhesive inelastic segments may be higher near the ends. Two inelastic adhesive segments may be positioned at the two ends.

While the film is being pretensioned in configuration a) the pulling part 11 may be left free in the direction Y transverse to the axis X. Depending on the nature of the material used, the pulling part may undergo a narrowing.

The pulling part according to configuration a) may undergo pretensioning along the X axis orthogonal to the segments but possibly along an axis Y perpendicular to the axis X or at an angle, or may be pretensioned along two perpendicular axes.

Still in a special case, pretensioning may be uniform in all directions.

In a special case, the pretensioning imparted in the direction perpendicular to the axis X is such that the width of the pulling part remains constant. 1

It is possible to adapt the pulling part according to configuration a) so that the segments do not run across the entire width of the pulling part 11.

Several aligned or non-aligned adhesive spots 19 may be positioned across one and the same width of the pulling part 11 as illustrated in Figures 7 and 8. That may make pretensioning along the two axes X and Y easier.

The pull may be applied along more than two axes, the pull for example being isotropic and obtained using a circular film, not depicted, that has continuous or discontinuous adhesive regions in concentric annular patterns or in a spiral.

Figures 9 and 10 depict a pulling part 11 according to configuration b) above, comprising an alternation of adhesive elastic segments 76 and of non-stick inelastic segments 75, in the X direction.

Tiny folds form under the adhesive elastic segments 76. It may be noted in some cases that the pulling part becomes detached from the skin at the adhesive elastic segments 76. This phenomenon is limited by using adhesive elastic segments 76 of small width.

The preferred solutions in configuration b) are a high number of segments and a somewhat narrow width of adhesive elastic segments 76. The width W of the adhesive elastic segments 76 is preferably somewhere between 50 μπι and 2 cm, more preferably still from 200 μιη to 5 mm.

Also preferred in configuration b) is a rather narrow width of non-stick inelastic segments 75. The ratio of the width of these segments to the width of the non-stick elastic segments may vary from ¾ to 4/1.

It is also preferable for the adhesive used to be powerful so as to obtain effective attachment using adhesive elastic segments of small width. The adhesion (in terms of detachment pressure) may be somewhere between 1 ,000 Pa to 1,000,000 Pa.

The adhesive elastic regions of the pulling part 1 1 may be smooth or may have a shape that encourages the skin to mould into a folded shape. For example, as illustrated in Figure 1 1, the pulling part may have adhesive elastic segments comprising one or more protrusions 168 protruding towards the skin. These protrusions 168 may be identical on each adhesive elastic segment 76 or their number and/or shape may vary according to the location on the pulling part.

The protrusions 168 may be in the form of a bead, as illustrated in Figure 12, or of ribs as depicted in Figure 11.

The adhesive elastic segments are not necessarily all identical to one another. In particular, the width of the segments may vary from one point to another on the pulling part 1 1 , it being possible for the segments near the ends to be narrower than those near the middle. The elastic return force may vary from one point on the pulling part 1 1 to another. The segments near the ends may be produced so that they apply a weaker elastic return force than those near the middle.

The distribution of the non-stick inelastic segments may be non-uniform. The density of non-stick inelastic segments may be higher near the ends. Two inelastic non-stick segments are preferably positioned at the two longitudinal ends.

It is possible to adapt configuration b) so that the segments do not run along the entire width of the film. It is also possible to position several aligned or non-aligned adhesive spots across one and the same width. These arrangements are preferred for pretensionmg along the two axes X and Y.

In configuration c) above, all of the segments are elastic and the adhesive segments alternate with non-stick segments. Such a configuration corresponds, for example, to Figure 2 described above. The pull is applied substantially uniformly to the entire pulling part. Thus, naturally, this configuration may create folds of a significant size. However, this configuration does have a benefit because of the presence of non-stick elastic segments. Specifically, the skin is free to move under these regions, and may limit the substantial folds in a few minutes.

The adhesive elastic segments are not necessarily all identical to one another. In particular, the width of the segments can vary from one point to another on the pulling part. In particular, the segments near the ends may be narrower than those near the middle.

The elastic return force applied by the segments may vary from one point on the pulling part to another. In particular, the segments near the ends may be produced in such a way as to apply a weaker elastic return force than those near the middle.

The same is true of the non-stick elastic segments.

It is possible to adapt configuration c) so that the segments do not run along the entire width of the film. It is also possible across one and the same width to position several aligned or non-aligned segments. These arrangements are preferred for creating pretension along the two axes X and Y.

In another configuration, the pulling part has a succession of segments, all of which arc adhesive. In this case, certain segments are elastic and others are not.

The device may, notably in the pulling part, be porous to water and/or to vapour and may or may not be biocompatible.

The adhesive may be in a continuous or discontinuous film, particularly in particulate form. The adhesive may or may not be water sensitive.

The pulling part may be produced using a film made of an electroactive material. To do that, use may be made of materials of the dielectric elastomer type in order to create a device known variously by its English name of "actuator". For example, use is made of an acrylic polymer film called VHB by its manufacturer 3M. The film, for example 50 μιη thick, is treated on both faces with two conductive coatings based on carbon black powder, which act as electrodes. A voltage is applied in order to create an extension effect.

In general, notably for configurations a) to c) above, the pulling part may have the following characteristics:

capacity for elongation: from 10% to 2000% and preferably from 10% to 1000%,

- instantaneous recovery >70% and preferably >80%. The measurement is taken with an extensometer at 0.1 mm/s. Then, after a tension of at least 10%, the tension is released and the recovery of the length of the film (with respect to the initial length) is measured.

recovery after 300 s>80% and preferably >90%. The measurement protocol is the same, but after waiting 300 s.

- elastic modulus: from 200 kPa to 200 MPa.

By way of indication, by way of a film from which to create the pulling part, use may be made of a film of the PLASTO make, which is characterized by a Young's modulus of 10 to 15 MPa and a maximum capacity for elongation in excess of 200%.

The force applied by the pulling part 11 along the axis X ranges, for example, between 0.1 and 50N.

When the adhesive is present on the device 10 upon first use thereof, it may be protected prior to the affixing of the device to the skin by a removable protective sheet, not depicted, such as silicone paper. The adhesive is preferably hypoallergenic. The adhesive may be a pressure sensitive adhesive known as a PSA.

Figure 13 depicts a device 10 comprising stress-relief parts 12 on each side of the pulling part 11.

In the example of Figure 13, each stress-relief part 12 extends over the entire length of the device 1 , on one side of the pulling part 11.

Each stress-relief part 12 may have a width WW, measured perpendicular to the axis X, which is constant as illustrated, but this situation could differ, as will be specified later on.

The stress-relief part or parts 12 may, as illustrated, comprise no adhesive and thus not adhere to the skin, simply covering it. The stress-relief part or parts 12 may be formed by areas of the film 20, as illustrated in Figures 13 and 14, the film 20 elsewhere serving to form the pulling part ! !..

The thickness of the stress-relief parts 12 may be greater than that of the film 20 in the pulling part, so as to exhibit lower elongation along the axis X than the pulling part 11 when the device 10 is stretched along the axis X when the pulling part 11 is stretchable.

The film 20 may thus have an increase in thickness at the stress-relief parts 12. The increase in thickness of the film 20 may be connected to a treatment of the film 20 so as locally to alter its thickness, or to the makeup of the film 20 which may differ at the pulling part and at the stress-relief parts 12. For example, the film 20 may have at least one additional coat or layer at the stress-relief parts, making it thicker.

Figure 14 depicts a film 20 which is not as Thick in the pulling part. The difference in thickness of the film 20 forms a recess which preferably faces towards the skin when the device is in place. That has the benefit that the visible exterior surface is without discontinuity on the visible side.

The or each stress-relief part 12 may also be attached to the film 20 from which the pulling part 11 is formed, for example being affixed by adhesive bonding or welding to the pulling part 1 1 , while extending beyond the film 20.

Figures 16 and 17 depict an exemplary embodiment in which the lateral parts 12 are attached to the pulling part 11, for example on the exterior side, the opposite side to the adhesive 19. The use of added-on stress-relief parts 12 may make it possible to use different materials for the pulling part 11 and for the stress- relief part or parts 12, notably materials that have a lower level of elongation along the axis X than the material from which the pulling part 1 1 is made.

Each stress-relief part 12 defines a region in which the device 10 rests against the skin and applies to the ski a pull which is weaker than the pull applied by the pulling part or even applies no pull at all.

Each stress-relief part 12 makes it possible to relieve the stresses that occur at the periphery of the pulling part and/or to contain the folds and/or to physically camouflage any residual folds.

Each stress-relief part 12 is preferably situated along the edges of the pulling part 11.

Each stress-relief part 12 may have a rectangular or some other shape.

Thus, the width WW of each stress-relief part 12, measured perpendicular to the axis X, may increase and then decrease in the direction along the longitudinal axis X, as illustrated in Figure 18. The or each stress-relief part 12 may be produced from a material which, as a result of the material and/or of its thickness, is somewhat insensitive to extension, or even does not extend at all when subjected to tension, or from a non-elastomeric material sensitive to extension but which, as a result of the material and/or its thickness, exhibits no return force.

It is also possible, for producing the or each stress-relief part 12, to use a material which is initially present in excess, before the device 10 is laid on the skin, as illustrated in Figures 19 and 20.

The or each stress-relief part 12 may have pleats or corrugations 28 which disappear when the pulling part 11 is stretched. The ratio I^ _x /L^ _t , where denotes the length after deployment and denotes the length in the pleated state, prior to deployment along the axis X, ranges for example between 1.5 and 1.05. As the pulling part 11 extends, the entire device 10 is stuck down onto the skin. The pulling part 1 1 pulls on the skin. However, the or each stress-relief part 12 is not stretched because the extension has done nothing more than unpleat the excess material.

The or each stress-relief part 12 may have non-zero elasticity, but an elasticity that is lower than that of the pulling part 11.

When the device comprises two stress relief parts 12, these may be symmetric with respect to one another about a mid-plane of the pulling part 11.

Notably, when the stress-relief part or parts 12 are adhesive, the device 10 may be produced in such a way that the pulling part 1 1 can be applied initially, followed in a second step by the stress-relief part or parts 12.

For example, the device 10 may be produced in such a way as to allow the or each stress-relief part 12 to be turned up out of the way while the pulling part 1 1 is being applied, with or without pretension, and then for the or each stress-relief part 12 to be applied to the skin, once the skin has been pulled, as illustrated in Figures 21 and 22.

The or each stress-relief part 12 is, for example, connected to the pulling part 11 with the possibility of folding along a line parallel to the axis X, for example situated along the longitudinal edge of the pulling part 11.

The or each stress-relief part 12 may produce a non-zero pull but a pull which is nonetheless weaker than the pull applied by the pulling part 11.

For that, it is possible either to use a material which, because of the material and/Or its thickness, is less sensitive to extension than is the pulling part 11 , or to use a material which is sensitive to extension but which, through the material and/or its thickness, has a return force weaker than that of the pulling part, or to use a material present in excess, but the excess of which is not enough to l ad to a complete absence of pull.

The pall om the skin by the or each stress-relief part 12 may decrease with increasing distance away from the pulling part 1 , either through the effect of the segmentation of the force or through the effect of the force gradient.

The or each stress-relief part 12 may be a film that breaks up the pull, comprising a plurality of spaced-apart adhesive regions and/or an alternation along the X axis of stretchable regions 31 and of regions 32 which are nonstretch or less stretchy, as illustrated in Figure 24.

In order to create the regions 32 which are nonstretch or less stretchy it is possible, for example, to attach to a stretchable film 41 pieces of a film 42 which is nonstretch or less stretchy, as illustrated in Figure 25, for example rectangular pieces.

In general, use is preferably made of a material, for the stress-relief part, which is thicker than that of the pulling part, for example of a thickness greater than or equal to 60 μπι and/or which has little inclination to pucker because it is somewhat rigid.

In one special case of the invention, the stress-relief part is as one with the pulling part, as illustrated in Figure 14 in particular.

In another example, the or each stress-relief part 12 is produced with a first film which covers the entirety of a second film used to produce the pulling part 11 , as illustrated in Figures 23 and 23 A.

A system may allow the pulling part 1 1 to extend elastically without stretching or contracting the stress relief region. This system for example as illustrated in Figure 23B comprises a slideway 44 allowing relative sliding between the stress-relief parts 12 and the pulling part 1 1. The slideway 44 is, for example, moulded or extruded with the film that forms the stress-relief parts 12.

In an alternative form illustrated in Figure 23C, the slideway is replaced by a coat 49 of an adhesive or of a gel.

In the example of Figure 23 A, the stress-relief parts 12 are produced with a first film 51 which covers the entirety of a second film 52 from which the pulling part 1 1 is made. The materials of the two films 51 and 52 are chosen so that the extend and/or return force of the second film 51 is imparted to the first while losing intensity. For example, the first film 51 is made of a material that is less elastomeric than the second.

The exterior surface of the device 10, which is situated on the opposite side to the skin when the device 10 is affixed to this skin, preferably has a surface finish which allows makeup products such as foundations to stick. The exterior surface may notably have a surface roughness for example comparable to that of the skin. The exterior surface may be textured, for example on account of the use of one or more non-smooth films for creating a relief by impression or by some other means. Applications

The devices according to the invention can be used on all parts of the body, notably those subject to the first and second phenomena detailed in the introduction, for example the neck, the face, but also the chest, the stomach, the buttocks, the arms and the legs in order for example to treat ptosis above the knee and the curve of the calves.

For example, in the case of the arms, the device according to the invention is affixed, with pretensioning, to the upper part of the arm as illustrated in Figure 26.

Examples of the pulling part

Example 1

This example is illustrated in Figure 27.

A strip 6 cm long by 2.4 cm wide is cut from a polyurethane adhesive film 100 of the PLASTO make, ref.: PI 171 and 25 μηι thick. This strip is elastic and adhesive on its anterior face.

Segments 101 measuring 2.4 cm long by 2 mm wide are cut from an inelastic adhesive strip of the 3M make, ref.: Scotch® Magic™.

These adhesive segments are stuck to the anterior face of the elastic strip spacing them 2 mm apart and in such a way that they have their adhesive face on the opposite side to the elastic strip. A silica powder 102, which cancels the adhesiveness of the regions onto which it is dusted, is then dusted alternately.

Thus, on its anterior face, the strip has an alternation of adhesive segments

2 mm wide and of non-stick segments 2 mm wide. Moreover, by pulling on the strip, it may be seen that only the non-stick segments are elastic.

This example illustrates configuration a).

Example 2

This example is illustrated in Figure 28.

A strip 105 measuring 6 cm long by 2,4 cm wide is cut from an adhesive polyurethane film 25 μιη thick of the PLASTO make (ref.: PI 171). This elastic strip is adhesive on its anterior face.

Segments 106 measuring 2.4 cm long by 2 mm wide are cut from an inelastic adhesive strip of the make 3M (ref.: Scotch® Magic™).

These adhesive segments are stuck to the anterior face of the elastic strip spacing them 2 mm apart. Thus, on its anterior face, the strip 105 has an alternation of adhesive segments 2 mm wide and non-stick segments 2 mm wide. Moreover, by pulling on the strip it can be seen that only the adhesive segments are elastic.

This example illustrates configuration b).

Comparative example 3

The same adhesive film as was used in examples 1 and 2 is used except that it is not altered by the addition of segments. Thus, the film is elastic and adhesive. Tests

When applied to various regions and in various scenarios corresponding to the first and second phenomena, it is seen that the best results in terms of folds are obtained with example 1 , then 2. These yield better results than example 3.

Second subject

Stress-relief part(s)

Figure 29 depicts an example of a device 10 according to the invention comprising a pulling part 11 elongated along an axis X and at least one stress-relief part 12, in this instance two stress-relief parts 12 positioned one on each side of the pulling part 11.

The pulling part 1 1 comprises a film 20 which is coated with adhesive on its face intended to come into contact with the skin, to define at least two regions 13 of attachment to the skin which are preferably, as illustrated, situated near the longitudinal ends 14 thereof.

The pulling part 11, which comprises the intermediate region 15 of the film

20 extending between the regions 13 of attachment along the axis X, may be elastically deformable, the film 20 for example being formed of an elastomeric material, for example a thermoplastic elastomer. The width t of the intermediate region 15 corresponds, in the example illustrated, to that of the attachment regions 13.

In the example of Figure 29, each stress-relief part 12 extends over the entire length of the device 10, on one side of the pulling part 11.

Each stress-relief part 12 may have a width W, measured at right angles to the axis X, which is constant, as illustrated, but the situation may differ, as will be specified later on. The greatest width Δ of the device is, for example, at least twice the width t of the pulling part 11.

The stress-relief parts 12 are formed, in the example considered, by those portions of the film 20 which extend beyond the intermediate region 15, the latter being of rectangular shape, the long sides coinciding with the tangents D pressed against the attachment regions 13.

The adhesive 19 is, for example, present on the device 10 upon first usethereof and may be protected prior to affixing to the skin by a removable protective sheet, not depicted, such as a silicone paper. As an alternative, the film 20 is initially devoid of adhesive 19 and the latter is applied by the user, either to the film 20 or to the skin before the film 20 is positioned thereon. The adhesive 19 is preferably hypoallergenic. The adhesive 19 may be a pressure sensitive adhesive known

The stress-relief part or parts 12 may, as illustrated, comprise no adhesive, and thus not adhere to the skin, simply covering it.

The stress-relief part or parts 12 may be formed by regions of the film 20, as illustrated in Figures 29 and 30, the film 20 elsewhere serving to produce the pulling part 1 1.

The thickness of the stress-relief parts 12 may exceed that of the film 20 in the intermediate region 15, so as to exhibit lower elongation along the axis X than the pulling part 11 when the device 10 is stretched along the axis X when the pulling part 11 is stretchable.

The film 20 may thus have an increase in thickness at the stress-relief parts 12. The increase in thickness of the film 20 may be connected with a treatment of the film 20 so as locally to alter its thickness, or with the makeup of the film 20 which may differ in the intermediate region 15 and at the stress-relief parts 12. For example, the film 20 may have at least one additional coat or layer at the stress- relief parts, to make it thicker. This additional coat or layer is for example formed by folding the film 20 onto itself and attaching it thereto or by superposing on a first layer which, in its central region, constitutes the intermediate part 15, a second layer of the same material or of a different material.

Figure 30 depicts a film 20 which is not as thick in the intermediate region 15. As may be seen in Figure 31 , the difference in thickness of the film 20 forms a recess 20a which preferably faces towards the skin when the device is in place. The benefit of this is that the visible exterior surface 20b has no discontinuity on the visible side.

The or each stress-relief part 12 may further be attached to the film 20 from which the pulling part 1 1 is formed, for example being fixed by adhesive bonding or welding to the pulling part 1 1, at the same time extending beyond the film 20.

Figures 35 and 36 depict one exemplary embodiment in which the pulling part 11 is in the form of a strip-like film 20, for example of constant width, the lateral parts 12 being added on to this film, for example on the exterior side, the opposite side to the adhesive 19. The use of added-on stress-relief parts 12 may make it possible to use different materials for the pulling part 11 and for the stress- relief part or parts 12, notably materials having a lower degree of elongation along the axis X than the material from which the pulling part 11 is made.

The distribution of the adhesive regions on the pulling part 11 may be varied.

As illustrated in Figure 32, the pulling part 11 may be uniformly covered with the adhesive 19, which may thus extend without discontinuity between the longitudinal ends 14. In this case, the skin may advantageously be pretreated to create regions where the pulling part 11 will have its adhesive power locally decreased. Such a pretreatment may comprise the step involving applying to the skin a compound that reduces adhesion, for example in pulverulent form. This application may be done in the form of a succession of segments.

In other examples, as illustrated in Figure 33, the pulling part 1 1 is covered with the adhesive 19 nonuniformly, and comprises at least one section 23, in the longitudinal direction, which is not covered with adhesive. For example, the pulling part 1 1 comprises an alternation of adhesive sections 24 and non-stick sections 23, from one longitudinal end to the other. The presence of non-stick sections 23 allows the skin to slide locally with respect to the device 10, thus reducing the formation of pronounced folds.

Each stress-relief part 12 defines a region where the device 10 is applied to the skin and applies to the skin a pull which is weaker than the pull applied by the pulling part or even applies no pull at all.

Each stress-relief part 12 makes it possible to relieve the stresses that arise at the periphery of the pulling part and/or to contain the folds and/or physically camouflage residual folds.

Each stress-relief part 12 is preferably situated along the edges of the pulling part 1 1. The junction between a stress-relief part 12 and the pulling part 11 may be in a straight line parallel to the direction of pulling.

Each stress-relief part 12 may have a rectangular or some other shape.

Thus, the width W of each stress-relief part 12, measured perpendicular to the axis X, may increase and then decrease with progress along the longitudinal axis X, as illustrated in Figure 37.

The or each stress-relief part 12 may be made from a material which, through the material and/or its thickness, is somewhat insensitive to extension, or even which does not extend when subjected to pulling, or from a non-el astomeric material sensitive to extension but which, because of the material and/or its thickness, exhibits no return force. Alternatively, it is possible to use, for the or each stress-relief part 12, a material which is initially present in excess, before the device 10 is laid on the skin, as illustrated in Figures 38 and 39.

The or each stress-relief part 12 may have pleats or corrugations 28 which disappear when the pulling part 11 is stretched. The ratio Lmax Linh, where denotes the length after deployment and Lj _n<t denotes the length in the pleated state, prior to deployment along the axis X, ranges for example between 1 .5 and 1.05. As the pulling part 11 extends, the entire device 10 is stuck down onto the skin. The pulling part 1 1 pulls on the skin. However, the or each stress-relief part 12 is not stretched because all the extension has done is to unpleat the excess material.

The or each stress-relief part 12 may have nonzero elasticity, but an elasticity that is lower tha that of the pulling part 11.

When the device comprises two stress-relief parts 12, these may be symmetric with respect to one another about a midplane of the pulling part 1 1.

Notably when the stress-relief part or parts 2 arc adhesive, the device 10 may be produced in such a way as to allow the pulling part 1 1 to be applied first of all followed, in a second step, by the stress-relief part or parts 12.

For example the device 10 may be produced in such a way as to allow the or each stress-relief part 12 to be turned up out of the way while the pulling part 11 is being applied, with or without pretension, and then allow the or each stress-relief part 12 to be applied to the skin once the skin has been pulled, as illustrated in Figures 40 and 41.

The or each stress-relief part 12 is, for example, connected to the pulling part 11 with the possibility of folding along a line parallel to the axis X, for example situated along the longitudinal edge of the pulling part 11.

The or each stress-relief part 12 may produce a pull that is nonzero but nonetheless weaker than the pull applied by the pulling part 11.

For that, use may either be made of a material which, through the material and/or its thickness, is less sensitive to extension than is the pulling part 1 1, or be made of a material that is sensitive to extension but which, through the material and/or its thickness, has a return force weaker than that of the pulling part, or use may be made of a material present in excess but the excess of which is not enough to lead to a total absence of pull.

The pull produced by the or each stress-relief part 12 on the skin may reduce with distance away from the pulling part 1 1 , either through the effect of the segmentation of the force or through the effect of the force gradient.

The or each stress-relief part 12 may be a film that breaks up the pull, comprising a plurality of spaced-apart adhesive regions 39, as illustrated in Figure 34 A for example, and/or an alternation along the axis X of stretchable regions and of non-stretch regions 32, as illustrated in Figure 34B.

In order to produce the non-stretch or less stretchy regions 32 it is, for example, possible to affix pieces of a non-stretch or less stretchy film 42 to a stretchable film 41, as illustrated in Figure 43, the pieces being for example rectangular pieces of film.

In general, use is preferably made of a material, for the stress-relief part, which is thicker than that of the pulling part, for example with a thickness greater than or equal to 60 μπι, and/or of a material with little tendency to pucker because it is somewhat rigid.

In one special case of the invention, the stress-relief part is as one with the pulling part, as illustrated in Figure 30 in particular.

In another example, the or each stress-relief part 12 is produced with a first film which covers the entirety of a second film used to produce the pulling part 11. In this case, as illustrated in Figures 42 and 44, a system allows the pulling part 11 to extend elastica ly without stretching or contracting the stress relief region. This system for example comprises a slideway 44 allowing relative sliding between the stress-relief parts 12 and the pulling part 11. The slideway 44 is, for example, moulded or extruded with the film that forms the stress-relief parts 12.

In an alternative form illustrated in Figure 45, the slideway is replaced by a coat 49 of an adhesive or of a gel.

In another example, illustrated in Figure 46, the stress-relief parts 12 are produced using a first film 51 which covers the whole of a second film 52 constituting the pulling part 11. The materials of the two films 51 and 52 are chosen so that the extension and/or return force of the second film 51 is imparted to the first, losing intensity. For example, the first film 51 is made of a material that is less elastomeric than the second.

The exterior surface of the device 10, situated on the opposite side to the skin when the device 10 is affixed thereto, preferably has a surface finish that allows makeup products such as foundations to stick. The exterior surface may notably have a surface roughness, for example comparable to that of the skin. The exterior surface may be textured, for example through the use of one or more non-smooth films or by the creation of a relief using impression or some other method.

Pulling part

The pulling part 11 may have various configurations without departing rom the scope of the present invention, The pulling part 11 may comprise an extensile or inextensible film or a film that breaks up the pull over several regions through the effect of the use of segments which are differentiated either in terms of elasticity or in terms of adhesion or both.

The skin movements desired through use of the invention can vary according to circumstance. For example, they range between 2 mm and 5 mm for a treated skin length of 10 mm. Thus, if a skin length of 5 cm, for example under the chin, is to be treated, one might seek to cause the skin to move by 1 cm to 2.5 cm.

The device 10 can be applied over approximately 2 cm in order to have a first anchorage on the skin, as illustrated in Figure 47A.

The device 10 is then pulled on the side by at least 1 cm. A fold is naturally created in the skin on the outside of the first anchor point, as illustrated in Figure 47B.

Next, the other part of the device is applied to the skin, for example over about 2 cm in order to form a second anchor point on the skin, as illustrated in Figure 47C.

In Figures 47 A to 47C the device 10 is depicted in tight dotted line and the wide dashes are used to identify movements.

It can be seen that a fold appears under the pulling part, this being embodied in the form of one or two big folds approximately a few millimetres deep, and at least the width of the pulling part.

To limit this defect, it is possible, for producing the pulling part, to use an elastic and adhesive film which is pretensioned prior to application.

The method is as follows. The pulling part is pretensioned over approximately 1 cm, as illustrated in Figure 48 A, then the pulling part is applied to the skin as illustrated in Figure 48B.

On releasing the pretension in the pulling part, the skin under the pulling part contracts and generates a pulling effect on the skin opposite, as illustrated in Figure 48C.

Although one might expect that the tension would distribute itself uniformly under the pulling part to form a number of very small barely noticeable folds, it is in fact found that the tension generates a few significant folds. This phenomenon is due to the mechanical properties of the skin. The skin seems more disposed to forming a small number of large folds than a large number of very small folds.

Pretensioning the pulling part makes it possible to use devices of smaller sizes because the useful surface area used to apply tension to the skin is greater in proportion to the size of the pulling part. The return force connected with the elasticity of the pulling part may be taken into consideration. The weaker this force the more desirable it is for the film to be pretensioned before it is applied.

In some cases, the skin and the pulling part tend to pucker, notably when the skin is not very well toned, as illustrated in Figures 4 A and 49B.

In this case in particular, the pulling part may advantageously comprise differentiated segments as illustrated in Figure 50 with, for example, an alternation of segments having different properties, in the direction of pulling. For example, some of the segments are adhesive and others are not.

In this situation there are three possible configurations:

a) the non-stick segments are elastic and the adhesive segments arc inelastic, b) the non-stick segments are not elastic and the adhesive segments are elastic, c) the adhesive segments and the non-stick segments are elastic.

What is meant by "inelastic segments" is segments which are inelastic or which are markedly less elastic than the segments termed elastic segments.

The inelastic segments are, for example, rigid in that under the pull applied by the operator their length does not change visibly.

In all three cases, the succession of differentiated segments allows the skin to be made to fold into a given shape and, in particular, means that the skin can be made to adopt folds which are broke down into numerous small folds. Being not very visible, this folding becomes acceptable.

Configuration a) above is the preferred configuration because if the pull is concentrated in a given region and this region docs not adhere in the skin, the skin is free to move and adopt the most favourable shape. Otherwise, that is to say when the pulling region is adhesive, the skin is locked in the situation it adopted at the time of application. If unattractive folds have become formed at that stage, they tend to be kept in that form.

Figure 51 illustrates the effect of a pulling part produced with an alternation of non-stick elastic segments 65 and inelastic adhesive segments 66.

It may be seen that very small folds have formed under the non-stick elastic segments 65.

If the elastic segments correspond to a combined length L _e for a total length L then the total extension E (in %) of the pulling part, which is concentrated in the elastic segments, leads to an extension of each segment by a factor greater than E.

Thus, each elastic segment undergoes an extension E _e :

E _s — E,L/L _e » If, as the forces are released, the contraction is total, the contraction of the skin will be C _c :

C _e =l-(1/(1+E _e ),

namely

C _e =l-(1/(1+ L.E))

The small folds are concentrated under the non-stick elastic segments with uniform distribution.

For a film with an alternation of non-stick elastic segments measuring 2 mm along the axis X and adhesive inelastic segments measuring 2 mm along the axis X, and subjected to a total extension E of 20%, each segment of skin positioned under a non-stick elastic segment of the device is contracted by C _e =29%, namely about 580 μπι. Given the shape that a fold can adopt, this means that its width is about 1 mm, for a depth of 300 μιη. The length of the fold may be the width of the pulling part. It may also extend beyond the width of the pulling part. Because the depth is small (300 μηι), it will extend beyond the width of the pulling part by only a small amount and will therefore be all the easier to conceal.

For a film with an alternation of 2 mm non-stick elastic segments and 1 mm adhesive inelastic segments and subjected to a total extension E of 20%, each segment of skin positioned under a non-stick elastic segment of the pulling part is contracted by C _e =25%, namely about 500 μτη. Given the shape that a fold can adopt, this means that its width is about 1 mm, for a depth of 250 μπι.

The elastic segments may be smaller. For a pulling part with an alternation of 1 mm non-stick elastic segments and 1 mm adhesive inelastic segments and subjected to a total extensio E of 20%, each segment of skin positioned under a non-stick elastic segment of the film is contracted by C _e =29%, namely about 250 μπι. Given the shape that a fold can adopt, this means that it is about 500 μπι wide, by 125 μιη deep. At this stage, the small folds that form barely extend beyond the width of the pulling part.

Thus the preferred solutions in configuration a) are a high number of segments and a somewhat narrow width of the non-stick elastic segments along the axis X.

The width of the non-stick elastic segments along the axis X is preferably chosen between 50 μηι and 2 cm, preferably from 200 μιη to 5 mm.

The ratio of the width of the adhesive inelasti c segments to the width of the non-stick elastic segments may vary from ¼ to 4/1.

The adhesive that defines the regions of attachment to the skin of the pulling part is preferably powerful so as to obtain effective attachment with somewhat narrow adhesive inelastic segments. The adhesion may (in terms of detachment pressure) be somewhere between 1 ,000 Pa and 1 ,000,000 Pa. The measurements are taken by pulling at a constant rate of 0.1 mm/s. The force necessary to pull off is measured.

The non-stick elastic regions of the pulling part may be smooth or have a shape that encourages the skin to mould into a folded form. For example, as illustrated in Figure 52, the pulling part may comprise non-stick elastic segments comprising one or more protrusions 68 protruding towards the skin.

These protrusions 68 may be identical on each segment 65 or their number and/or shape may vary according to the location on the pulling part.

The protrusions 68 may be in the form of a bead, as illustrated in Figure 53, or of ribs, as illustrated in Figure 52.

Moreover, the non-stick elastic segments are not all necessarily identical to one another. In particular, the width of the segments may vary from one location on the pulling part to another, the segments near the ends for example being narrower than those near the middle. The elastic return force may vary from one point to another. For example, the segments near the ends may be produced so that they exert a weaker elastic return force than those near the middle.

The distribution of the adhesive inelastic segments may be nonuniform. The density of adhesive inelastic segments may be higher near the ends. Two inelastic adhesive segments may be positioned at the two ends.

While the film is being pretensioned in configuration a) the pulling part may be left free in the direction transverse to the axis X. Depending on the nature of the material used, the pulling part may undergo a narrowing.

The pulling part in configuration a) may undergo pretensioning along the axis X orthogonal to the segments but possibly along an axis Y perpendicular to the axis X or at an angle, or may be pretensioned along two perpendicular axes.

Still in a special case, the pretensioning may be uniform in all directions.

In one special case, the pretension applied in the direction perpendicular to the axis is such that the width of the pulling part remains constant.

It is possible to adapt the pulling part according to configuration a) so that the segments do not run over the entire width of the pulling part. Several segments, aligned or non-aligned, may be positioned over one and the same width as illustrated in Figures 54 and 55. That may make pretensioning along the two axes X and Y easier.

The pull may be applied along more than two axes, the pull for example being isotropic, obtained using a circular film with continuous or discontinuous adhesive regions in concentric rings or in a spiral. Figures 56 and 57 depict a pulling part according to configuration b) above.

Tiny folds are formed under the adhesive elastic segments 76. It may be noted that, in certain cases, there is detachment of the pulling part at the adhesive elastic segments 76. This phenomenon can be limited by using adhesive elastic segments which are not very wide.

The preferred solutions in configuration b) are a high number, for example between 3 and 100, of segments and a somewhat narrow width of the adhesive elastic segments 76. The width of the adhesive elastic segments 76 lies somewhere between 50 μπι and 2 cm, preferably from 200 μηι to 5 mm.

Also preferred in configuration b) is a somewhat narrow width of non-stick inelastic segments 75, the ratio of the width of these segments to the width of the non-stick elastic segments varying from ¼ to 4/1.

It will also be preferable for the adhesive used to be powerful in order to obtain effective attachment with adhesive elastic segments that are not very wide. Adhesion may (in terms of detachment pressure) be somewhere between 1 ,000 Pa to 1,000,000 Pa.

The adhesive elastic regions of the pulling part may be smooth or have a shape encouraging the skin to mould into a folded shape. For example, as illustrated in Figure 52, the pulling part may comprise adhesive elastic segments comprising one or more protrusions 168 protruding towards the skin.

These protrusions 168 may be identical on each adhesive elastic segment or their number and/or shape may vary according to the location on the pulling part.

The protrusions 68 may be in the form of a bead, as illustrated in Figure 59, or of ribs, as depicted in Figure 58.

The adhesive elastic segments are not necessarily all identical to one another. In particular, the width of the segments may vary from one point on the pulling part to another, it being possible for the segments near the ends to be narrower than those near the middle.

The elastic return force may vary from one point on the pulling part to another. The segments near the ends may be produced so that they apply a weaker elastic return force than those near the middle.

The distribution of the non-stick inelastic segments may be nonuniform. The density of the non-stick inelastic segments may be higher near the ends. Two inelastic non-stick segments may be positioned at the two ends.

It is possible to adapt configuration b) so that the segments do not run along the entire width of the film. It is also possible to place several aligned or non-aligned segments on one and the same width. These arrangements are preferred effective in creating pretension along the two axes X and Y. In configuration c), all of the segments are elastic and the adhesive segments alternate with the non-stick segments. Pulling is performed substantially uniformly over the entire pulling part. Thus, this configuration may naturally create folds of a large size. However, this configuration is of benefit because of the presence of non-stick elastic segments. Specifically, the skin is free to move under these regions and in a few minutes can limit the significant folds.

The adhesive elastic segments are not necessarily all identical to one another. In particular, the width of the segments may vary from one point on the pulling part to another, in particular, the segments near the ends may be narrower than those near the middle.

The elastic return force applied by the segments may vary from one point on the pulling part to another. In particular, the segments near the ends may be produced so that they exert a weaker elastic return force than those near the middle.

The same is true of the non-stick elastic segments.

It is possible to adapt configuration c) so that the segments do not run over the entire width of the film. It is also possible for several segments, aligned or non-aligned, to be positioned across one and the same width. These arrangements are preferred for creating pretension along the two axes X and Y.

In another configuration, the pulling part has a succession of segments, all adhesive. In this case, some segments are elastic and others are not.

The device may, notably in the pulling part, be porous to water and/or to vapour, and may or may not be biocompatible.

The adhesive may be a continuous or discontinuous film, particularly in particulate form. The adhesive may or may not be water-sensitive.

The film of the pulling part may be made of an electroactive material. The pulling part may have the following properties:

capacity for elongation: from 10% to 2000% and preferably from 10% to 1000%

- instantaneous recovery >70% and preferably >80%. The measurement is made using an extensometer at 0.1 mm/s. Then, after tension of at least 10%, the tension is released and the recovery of the length of the pulling part (in relation to the initial length) is measured.

recovery at T=300 s >80% and preferably >90%. The measurement protocol is the same, but after having waited 300 s.

elastic modulus: from 200 kPa to 200 MPa.

By way of indication, by way of a film from which to create the pulling part use may be made of films of the PLASTO mark which are characterized by ¾ Young's modulus of 10 to 15 MPa and a maximum capacity for elongation greater than 200%.

Applications

The devices according to the invention can be used on all parts of the body, notably those subject to the first and second phenomena detailed in the introduction, for example the neck, the face, but also the torso, the stomach, the buttocks, the arms and the legs in order for example to treat ptosis above the knee and the curve of the calf.

For example, in the case of the arms, the device according to the invention is affixed with pretension to the upper part of the arm as illustrated in Figure 60. Examples of pulling parts

Example 4

This example is illustrated in Figure 61.

A strip measuring 6 cm long by 2.4 cm wide is cut from an adhesive polyurethane film 100 of the PLASTO make ref.: PI 171 and 25 μιη thick. This strip is elastic and adhesive on its anterior face.

Segments 101 measuring 2.4 cm long by 2 mm wide are cut from an inelastic adhesive strip of the 3M make, ref.: Scotch® Magic™.

These adhesive segments are stuck to the anterior face of the elastic strip spacing them to 2 mm apart and so that they have their adhesive face on the opposite side to the elastic strip, as illustrated in Figure 61. A silica powder 102 is then applied alternately to cancel the adhesive power of the regions on which it has been applied.

Thus, on its anterior face, the strip carries an alternation of adhesive segments 2 mm wide and non-stick segments 2 mm wide. Moreover, by pulling the strip, it may be seen that only the non-stick segments are clastic.

This example illustrates configuration a).

Example 5

This example is illustrated in Figure 62.

A strip 105 measuring 6 cm long by 2.4 cm wide is cut from an adhesive polyurethane film 25 μτη thick of the PLASTO make (ref: PI 171). This strip is adhesive on its elastic anterior face.

Segments 106 measuring 2.4 cm long by 2 mm wide are cut from an inelastic adhesive strip of 3M make (ref.: Scotch® Magic™).

These adhesive segments are stuck to the anterior face of the clastic strip, spacing them 2 mm apart. Thus, the strip 105 on its anterior face carries an alternation of adhesive segments 2 mm wide and non-stick segments 2 mm wide. Moreover, by pulling the strip, it may be seen that only the adhesive segments are elastic.

This example illustrates configuration b).

Example 6

Use is made of the same adhesive film as was used in examples 4 and 5, except that it is not modified by the addition of segments. Thus, the film is both elastic and adhesive.

Tests

Applied to various regions and hi various scenarios corresponding to the first and second phenomena, it is found that the best results in terms of folds arc obtained with example 4, followed by example 5. These yield better results than example 6.

Examples with stress-relief parts

Example 7

A film is cut from a 25 μιη elastomeric adhesive strip made of polyurethane of the PLASTO make (ref.:Pl 171).

Two elastomeric adhesive strips as illustrated in Figure 40 described hereinabove are positioned on the two sides.

The pulling part is stretched and applied to the skin, taking care during this operation not to bring the stress relief regions into contact with the skin.

The stress relief regions are folded down.

Example 8

In another example, two thick nonelastomeric adhesive strips of the 3M make (Tegaderm™ roll, ref.: 16004) are positioned on the two sides of the pulling part. The same procedure as described above is followed.

Third subject Film

A film according to the invention is used to pull the skin directly or indirectly in at least one direction of pulling X'.

Figure 63 depicts one example of a film 1000. This film in the example illustrated is of rectangular shape but the invention is not restricted to any one particular shape.

A film 1000 according to the invention may have uniform or nonuniform properties and may notably have a succession of segments with different adhesive and/or elastic properties along the axis X'. Thanks to the pretreatment, the invention advantageously allows the use of a film with uniform properties, for example which is continuously coated wife adhesive on the face 1100 that is to be applied to the skin.

The film used is preferably extensible in an elastically deformable way, and advantageously allows an extension of at least 10% in the direction of pulling X ¹ which preferably coincides with the longitudinal axis of the film 1000. The capacity for elongation of the film 1000 ranges for example from 10% to 2000%.

The film 1000 may comprise a synthetic substrate covered with a coat of adhesive. The synthetic substrate is preferably made of a thermoplastic elastomcric material.

The total thickness of the film ranges for example between 1 and 200 μηι.

The side 1200 of the film 1000, which is the opposite side to the face 1 100 to be applied to the skin, preferably has a surface finish compatible with the application of a makeup product and/or an appearance imitating that of the skin.

The adhesive present on the application face 1 100 is preferably hypoallergenic. Its resistance to detachment ranges for example from 0.1 N/cm to 10 N/cm ² .

The adhesive may be a pressure sensitive adhesive known as a PSA.

In one special case of the invention, the film is formed in situ, being the result of a fluid film-forming composition that can be applied to and spread out on the skin and which forms a film as it dries or crosslinks. For example, the compound is a polymer such as an acrylic or methacrylic or acrylatc or methacrylate copolymer or copolymer of polyurethanes or of polyamides or of vinyl polymer or derivatives of natural compounds such as guar and cellulose.

In the example illustrated in Figure 63, the application face 1 100 is completely covered with adhesive but in alternative forms that have not been illustrated the adhesive is applied in a pattern and only partially covers the application face 1100.

The total length T of the film 1000 ranges for example between 1 and 10 cm and its width U between 1 and 20 mm.

Pretreatment

The pretreatment may, in one exemplary embodiment of the invention, consist in applying to the skin a composition, notably a fluid composition, capable of being absorbed into the skin or forming a film on the skin. This composition may be colourless or may be flesh coloured.

For example, use may be made of a composition containing a polymer, which may or may not be crosslinkable, particles, at least one lubricating compound chosen, for example, from oils, waxes, products with low surface tension, or at least one compound with adhesive properties.

The composition may be applied in a special pattern, for example in a succession of segments. For example, use is made of a pad with cutouts, a stencil or an applicator roller in order to apply the composition in an alternating pattern, as illustrated in Figure 64.

In this figure, it may be seen that the pretreatment means can be applied in the form of segments 2000, each of elongate shape along an axis Y' which is preferably substantially perpendicular to the direction of pulling X'.

Each segment 2000 is continuous, in the example illustrated, in the direction Y' but could, in an alternative, be produced in the form of a succession of spots in the direction Y'. The width W of a segment 2000 ranges for example between 0.05 and 5 mm.

The length L of a segment 2000 ranges for example between 1 and 20 mm. All the segments 2000 may have the same length, as illustrated, or as an alternative, a width that varies with distance in the direction X'.

A segment may be of constant or variable width.

The length L of the segments 2000 is preferably greater than or equal to the width U of the film 1000, to make it easier to position.

The pretreatment means is, for example a pulverulent or liquid product applied to the skin or pieces of film intended to afford firming and/or non-stick properties. For example, use may be made of inorganic or organic powders such as talc, alumina, silica, boron nitride, graphite, silicone powders, fluorinated compounds, polymers such as fragments of polyester, polyamidc, polystyrene.

Alternatively, a pretreatment composition may be applied uniformly and then, using a stamp or some object intended to remove the composition applied, such as a felt tip for example, the composition is forced to adopt a particular pattern, for example a succession of segments as illustrated in Figure 64.

Alternatively, the pretreatment composition can be applied uniformly and then, using an energy dispensing tool, the composition can be forced to adopt a particular pattern, for example a succession of segments as illustrated in Figure 64. For example, a composition is applied to the skin which composition, under UV radiation, becomes adhesive or stiffens. This composition is applied to the skin uniformly for example. It is then irradiated in a predetermined pattern, for example through a mask. In this way, a succession of adhesive segments can be formed. Any composition that has not been exposed to the radiation can be removed by rinsing, if need be. Next, the film is applied to the pretreated region. For example, a mixture of acrylic resin containing acrylic units that have not reacted and a photoinitiator is applied. The coating is irradiated under conditions such that a partial reactio is caused. After rinsing, the parts that have not been exposed are eliminated because they are water soluble. The parts that have been exposed are not eliminated and remain sticky because the reaction has not been complete.

The pretreatment can also be carried out in two stages. In a first stage, a first composition 2300 is, for example, applied continuously to the skin, for example in a strip, as illustrated in Figure 65. In a second stage, a firming or nonstick compound 2400 is applied to create a pattern on the first composition 2300, for example a succession of segments of increased rigidity or firmness and/or with non-stick properties. For example, an adhesive is applied uniformly then a powder such as talc is applied selectively and locally decreases the adhesive power, for example using a pad impregnated with powder.

The pretreatment means may be applied by transfer. For example, a pretreatment composition is arranged in a particular pattern on a transfer sheet which is applied to the skin. The transfer created for example forms a succession of regions the adhesive properties of which differ from that of the skin. If need be, the transfer shee is applied to a region already coated with an adhesive and the transfer decreases this adhesive power in certain regions, for example arranged in a succession of segments as in Figure 65.

In another exemplary embodiment of the invention, the pretreatment comprises application of a compound such as a film or a solid or flexible material, for example short lengths of film. This compound can be applied by transfer if appropriate.

It is also possible to apply the pretreatment means in such a way as to encourage the skin to move in a direction which preferably coincides with the ^' direction of pulling X' and makes such movement more difficult in a perpendicular direction.

For example, the pretreatment may comprise the application, as illustrated in Figure 66, of segments 2700 which make the skin firmer while at the same time maintaining a possibility of movement relative to one another in the direction of pulling X'. These segments 2700 for example have a shape that is elongated in the direction X'. Because of the imbricated arrangement of the segments 2700, the pull is applied with more difficulty in the perpendicular direction Y'. The segments 2700 for example consist of a rigid or nonextensible compound, for example a film that resists pulling, for example of a thickness greater than 60 μηι. Use may, for example, be made of a film of Scotch Magic™ of the 3M make.

The rigid film may have an elastic modulus at least 4 times higher than the elastic modulus of the dcformable adhesive film applied following the pretreatment. The segments 2700 may consist of a material that has a preferential resistance to pulling in one direction which preferably coincides with a direction perpendicular to the direction of stretching X'.

In general, the pretreatment may confer upon the skin properties such as: o non-stick properties.

In this case, the pretreatment may comprise the application, notably in s pattern, preferably in a succession of regions spaced apart:

of a low surface tension compound (PTFE for example or reactive silicones, and/or

of particles such as fibres, beads or platelets, for example cellulose fibres, talc, glass beads, perlite, diatoms, silica, titaniu dioxide, and/or

of lubricating compounds such as oily hydrophobic compounds, for example natural oils or waxes, hydrocarbon oils or waxes, triglycerides, fatty alcohols, Vaseline, alkanes, and/or

- of a compound capable of entering the skin to change its adhesion properties, for example a compound that changes the surface tension properties, or a product that alters the biology of the skin, such as a desquamation product or a skin thickener. For example, use is made of an oil or of a wax.

• Adhesion properties

In this case, the pretreatment may comprise the application of an adhesive compound, for example a polymer compound with a low glass transition temperature Tg, for example with a Tg < 0°C, for example AQ1350 by Eastman Chemical

and/or

of a nonslip compound, for example an elastomeric polymer compound, and/or

of a compound which will heighten or strengthen the adhesive power of the film, for example a suitable a solvent, and/or

of a compound able to enter the skin to change its adhesion properties. For example a silicone oil.

® Firming or softening properties

In this case, the pretreatment may comprise:

application of a firming pretreatment means as illustrated in Figure 66 which makes the skin easier to stretch in the direction of pulling than in the perpendicular direction, and

application of a compound able to enter the skin to change its firmness properties, for example a polymerizing compound, or one which leads to the formation of keratinization, or a softener, notably a moisturizer or emollient. When a rigid film is applied to the skin, this rigid film may have an elastic modulus at least 4 times higher than the elastic modulus of the deformable adhesive film applied following the pretreatment.

The pretreatment may apply no pull to the skin.

As an alternative, the pretreatment is implemented in such a way as to pull on the skin. In this case, the film may serve to sustain this pull over time.

Figure 67 A depicts a region of bare skin P and Figure 67B depicts this region after pretreatment with the formation of a pull, for example by pressure. The pretreated skin is then covered with a film that maintains the tension.

In Figure 68 A, the skin P is pretreated with the application of an adhesive.

The skin is then pinched as illustrated in Figure 68B, then the skin thus pinched is covered with a film 1 0 that maintains the tension, as depicted in Figure 68C.

Relative positionings of the pretreated region and of the film

The pretreatment region Z' may coincide precisely or approximately with the region .of application of the film 1000, as illustrated in Figure 69.

The pretreatment region Z', depicted with shading in Figures 69 to 72, may be just part of the region of application of the film 1000, as illustrated in Figure 70 or may extend beyond the region of application of the film 1000, as illustrated in Figure 71 or alternatively may not coincide with the region of application of the film, as illustrated in Figure 72.

Figures 71 and 72 show that the pretreatment region may extend over the sides of the film, with respect to the direction of pulling X'.

The pretreatment region may extend into fine lines or wrinkles that already exist, particularly those which are perpendicular to the direction of pulling.

The pretreatment region may apply to the skin but in such a way as to surround the fine lines or wrinkles that already exist, particularly those perpendicular to the direction of pulling.

The pretreatment may have an effect of pulling on the skin and/or may create fine lines or wrinkles at precise points.

The pretreating of the skin may be performed each time a film is applied.

As an alternative, the pretreatment is performed from time to time. Thus the film can be applied without having to perform the pretreatment every time.

Moreover, the pretreatment may have other benefits or functions, which are conferred by the pretreatment alone or in conjunction with the film:

- It may assist the user in locating where to apply the film, the pretreatment for example comprising one or more coloured guides. For example, a colorant may be added to the adhesive. It may assist the user in determining how much tension he or she needs to apply to the film, the pretreatment for example comprising one or more guides or indications on the degree of extension. A colorant may be added to the adhesive.

It may assist the user in tolerating the film, the pretreatment for example comprising the application of a calming or anti-irritant product,

it may help the film to maintain its condition or adhesion over time, the pretreatment for example having an anti-sebum action,

it may perform additional functions on the skin, the pretreatment for example having an antiblemish, antiwrinkle, exfoliating, thinning, colouring effect, it may give the film a function such as a contraction initiator in order to increase the effect that it has,

it may assist the user with detaching or replacing the film.

Preferred cases

By combining the pretreatment with an elastically deformable film the following are preferably performed:

a) A succession of non-stick segments is applied to the skin, for example in the layout illustrated in Figure 64. Thus, the film 1000 is anchored on the pretreated region of the skin. The film 1000 pulls on those regions of skin which are situated between the non-stick segments.

b) A succession of rigid segments is applied to the skin, for example in the layout illustrated in Figure 64. Thus, the film is anchored on the entire pretreated region of the skin but the pull is preferential on those regions which are situated between the rigid segments.

c) A succession of rigid and non-stick segments is applied to the skin. Thus, the elastic film is anchored on the entire pretreated region but the pull is preferential in the regions situated between the rigid and adhesive segments.

d) The film 1000 is applied to a region of skin which is not covered by a pretreatment means but is close to a region of skin covered by a pretreatment means. In this case, the preferred situation is the situation in which the pretreatment gives the skin firmness.

e) The film 1000 is applied to a region of skin that is covered by a pretreatment means that extends beyond the sides of the film. In this case, the preferred situation is the situation in which the pretreatment gives the skin firmness.

Proposed examples

Example 9 A strip measuring 6 cm long by 2.4 cm wide is cut from a 25 μπι thick adhesive polyurethane film of the PLASTO make (ref.:P1171). This strip is adhesive on its anterior face. It is also elastically deformable.

An adhesive composition formed of 10% AQ 1350 by the company Eastman Chemicals is applied to a sheet of parchment paper 6 cm long and 3 cm wide. After drying, a talcum powder is applied to the sheet, taking care to ensure that the powder forms parallel segments 2 mm wide and 3 cm long. Each segment is separated from the next by 2 mm. Thus, 15 segments are created over the 6 cm of length of the sheet of parchment paper.

The same adhesive composition of AQ 1350 as was mentioned hereinabove is applied to the skin at the neck, along the sides. Following application, the sheet of parchment paper is applied to the region. Following application, the sheet is removed. The segments formed of talc are transferred to the composition applied to the skin.

Next, the adhesive film is stretched out so that it measures 8 cm long and is affixed in such a way as to cover the region which has received the sheet of parchment paper, the two ends of the film extending 1 cm beyond this region. Comparative example 9

The same experiment is performed but without pretreating the skin.

It is found that the results in terms of the pull applied to the neck are equivalent but far fewer big folds of skin are observed in the case with the pretreatment, making the result far more attractive.

Example 10

Segments measuring 2.4 cm long by 2 mm wide are cut from an inelastic adhesive strip of the 3M make (ref: Scotch® Magic™).

These adhesive segments arc stuck to the skin of the neck so that they are parallel, and over a length of 6 cm.

Then, using the same method as was used in example 9, an adhesive film made of polyurethane of the PLASTO make is applied.

Comparative example 10

The same experiment is performed without the pretreatment.

It is found that the results in terms of the pull applied to the neck are equivalent but far fewer large folds of skin are observed in the case with pretreatment, making the result far more attractive.

The invention is not restricted to the examples illustrated.

The features of the various examples can be combined in alternative forms which have not been illustrated. Examples 1 and 2 can be carried out with stress- relief parts. The expression "comprising a/an/one" is to be understood as "comprising at least a/an/one".