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Title:
SPIRAL COSMETIC APPLICATOR
Document Type and Number:
WIPO Patent Application WO/2020/127707
Kind Code:
A1
Abstract:
The invention relates to an applicator (2) for applying a cosmetic product to the eyelashes and/or eyebrows, comprising a monobloc applicator member (8) made of a non-thermoplastic material, the applicator member (8) comprising: a core (10) extending along a longitudinal axis (X), the core (10) comprising at least one helical groove (16, 17) extending along the longitudinal axis (X) around the latter and forming more than one turn around the longitudinal axis of the core (X); at least one row of applicator elements (18; 18a, 18b;18c, 18d) extending from the core, helically around the longitudinal axis of the core (X), along the helical groove (16, 17), in particular parallel to the latter.

Inventors:
OUNACEUR AMINE (FR)
SCHREIBER CAMILLE (FR)
THENIN AUDREY (FR)
Application Number:
PCT/EP2019/086275
Publication Date:
June 25, 2020
Filing Date:
December 19, 2019
Export Citation:
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Assignee:
OREAL (FR)
International Classes:
A45D40/26; A46B9/02; B22F3/105; B29C64/153; B33Y10/00; B33Y80/00
Domestic Patent References:
WO2014207673A12014-12-31
WO2016050790A12016-04-07
WO2018007758A12018-01-11
WO2017212123A12017-12-14
WO2009141098A12009-11-26
WO2008113939A22008-09-25
WO2016050790A12016-04-07
WO2015106816A12015-07-23
WO2014126830A22014-08-21
WO2014126837A22014-08-21
Foreign References:
US20170027303A12017-02-02
US20080115798A12008-05-22
FR3006566A12014-12-12
FR3004905A12014-10-31
Attorney, Agent or Firm:
TANTY, François (FR)
Download PDF:
Claims:
Claims

1. Applicator (2) for applying a cosmetic product to the eyelashes and/or eyebrows, comprising a monobloc applicator member (8) made of at least a non thermoplastic material, the applicator member (8) comprising:

- a core (10) extending along a longitudinal axis (X), the core (10) comprising at least one helical groove (16, 17) extending along the longitudinal axis (X) around the latter and forming more than one turn around the longitudinal axis of the core (X),

- at least one row of applicator elements (18; 18a, 18b;18c, 18d) extending from the core, helically around the longitudinal axis of the core (X), along the helical groove (16, 17), in particular parallel to the latter.

2. Applicator according to Claim 1, wherein the applicator member (8) is obtained by additive manufacturing, in particular on the basis of a preestablished digital model by solidification of a raw material, slice by slice, from one end of the applicator member (8) to the other.

3. Applicator according to Claim 1 or 2, wherein the row of applicator elements forms a plurality of turns around the longitudinal axis of the core, in particular more than 3 turns, better still more than 5 turns, even better still between 6 turns and 15 turns, even better still between 6 turns and 12 turns around the core.

4. Applicator according to any one of the preceding claims, wherein the core (10) comprises at least two helical grooves (16, 17) extending around the longitudinal axis of the core (X), in opposite directions and with the same pitch, the two grooves (16, 17) preferably being parallel to one another.

5. Applicator according to Claim 4, wherein the applicator elements (18; 18a, 18b; 18c, 18d) extend in at least two helical rows around the longitudinal axis of the core, the rows being parallel to the grooves (16, 17).

6. Applicator according to any one of the preceding claims, wherein the applicator elements (18; 18a, 18b; 18c, 18d) extend in one or more helical rows forming spirals around the longitudinal axis of the core (X), and applicator elements (18; 18a, 18b; 18c, 18d) extending from adjacent spirals along the longitudinal axis of the core (X) are not superposed at their bases, when the applicator member (8) is seen end-on.

7. Applicator according to any one of the preceding claims, wherein the applicator member (18; 18a, 18b; 18c, 18d) comprises two types of applicator element (18a, 18b), the applicator member (8) comprising first applicator elements (18b) in the form of spikes and second applicator elements (18a) taking a different form to the first applicator elements, in particular in the form of teeth, loops and/or comprising one or more surface reliefs, for example one or more protuberances and/or an enlarged head.

8. Applicator according to Claim 7, wherein the or each row of applicator elements (18; 18a, 18b) comprises alternating first applicator elements (18b) and second applicator elements (18a).

9. Applicator according to Claim 7 or 8, wherein the second applicator elements (18a) extend in a plane transverse to the longitudinal axis of the core (X) being inclined at their base relative to a radius starting from the core, in particular making an angle of between 0 and 90°, better still between 5 and 30°, even better still between 10 and 20°.

10. Applicator according to any one of Claims 7 to 9, wherein the second applicator elements (18a) are perpendicular at their base to the surface of the core (10) from which they extend.

11. Applicator according to any one of Claims 7 to 10, wherein the first applicator elements (18b) are inclined at least partially towards the same longitudinal end (13; 11) of the applicator member (8).

12. Applicator according to any one of Claims 7 to 11, wherein the first applicator elements (18b) are inclined relative to the radial axis (R) of the core at their base by an angle a of between 0 and 90°, better still between 5 and 30°, even better still between 10 and 20°.

13. Applicator according to any one of Claims 7 to 12, wherein the distal ends of the second applicator elements (18a) define the envelope surface (S) of the applicator member (8).

14. Applicator according to any one of Claims 1 to 6, wherein the applicator member (8) comprises only a single type of applicator elements (18; 18c, 18d) of the same shape, in particular the shape of teeth, of a loop and/or comprising one or more surface reliefs, for example one or more protuberances and/or an enlarged head.

15. Device for packaging and applying a product to the eyelashes and/or eyebrows, comprising an applicator according to any one of the preceding claims and a container containing the product.

16. Method for producing an applicator according to any one of Claims 1 to 14, wherein a blank of the applicator member or the applicator member itself is produced in successive layers with relative movement of the part already built in the direction away from the build zone.

17. Method for making up the eyelashes and/or eyebrows using an applicator according to any one of Claims 1 to 14, wherein the product is applied by bringing the applicator into contact with the eyelashes and/or eyebrows.

Description:
Description

Title: Spiral cosmetic applicator

The present invention relates to an applicator for applying a cosmetic product to the eyelashes or eyebrows, notably a makeup or care product, for example mascara, and to corresponding packaging and application devices. The invention also relates to a method for producing such an applicator and to the associated makeup method.

Technical field

International application WO 2008113939 describes a method for producing an applicator for applying a cosmetic product to the eyelashes and/or eyebrows, by additive manufacturing. The applicator comprises an applicator member comprising a core and teeth extending from the core. The teeth do not have relief and each extend in a plane transverse to the longitudinal axis of the core.

International application WO 2016/050790 discloses an applicator for applying a cosmetic product, comprising a moulded applicator member comprising a core and applicator elements extending from the core, the core comprising at least two helical grooves extending along the longitudinal axis of the core.

Application W02008/113939 describes an applicator for applying a cosmetic product, produced by additive manufacturing, comprising a plurality of grooves extending helically around the core over at least one turn.

There is a need to further improve applicators for applying a product, notably mascara, to the eyelashes and/or eyebrows, in order to improve the performance thereof, and, if need be, allow particular makeup effects to be obtained.

Summary of the invention

The invention aims to meet this objective and the subject thereof, according to one of its aspects, is an applicator for applying a cosmetic product to the eyelashes and/or eyebrows, comprising a monobloc applicator member made of at least one non thermoplastic material, the applicator member comprising:

- a core extending along a longitudinal axis, the core comprising at least one helical groove extending along the longitudinal axis, around the latter and forming more than one turn around the longitudinal axis of the core, - at least one row of applicator elements extending from the core, helically around the longitudinal axis of the core, along the helical groove, in particular parallel to the latter.

The term“ applicator element” denotes individualizable projecting elements intended to come into engagement with the eyelashes and/or eyebrow.

The“ longitudinal axis of the core” denotes the line connecting all of the centres of mass of the cross sections of the core. The longitudinal axis may be a central axis, or even an axis of symmetry for the core, notably when the core has a circular cross section or a cross section in the overall shape of a regular polygon. The longitudinal axis of the core may be rectilinear or curved and may be contained in a plane, which may be a plane of symmetry for some or even for all of the cross sections of the core. Preferably, the longitudinal axis of the core is rectilinear. As an alternative, this core may have one or more curves.

The term“ monobloc” means that the applicator member is made as a single piece. The applicator member may be made of a single non-thermoplastic material. As an alternative, the applicator member may comprise several materials, notably parts made of different materials fused together at their join during production so as to form just one single part. For example, the core comprises a centre of a flexible material covered with a casing of a more rigid material, the two materials being fused together at their joins.

The invention makes it possible to obtain, on the applicator member, in particular along the groove, at least one zone that forms a reservoir, the contents of said zone not being emptied during the extraction of the applicator, thus producing, after wiping, a surplus of product along the entire length of the core and on all sides. This surplus of product allows the eyelashes and/or eyebrows to be loaded with a large and satisfactory amount of product from the first application.

The groove forms a twist around the core. As the makeup is applied, the groove is gradually emptied of its contents. The eyelashes and/or eyebrows are thus properly covered with product without the user having to reload the applicator too frequently by reinserting it into the container.

The depth of the grooves can be varied in order to adjust the level to which the applicator is loaded with product after passing through the wiping member. The fact that the groove and the row of applicator elements make more than one turn about the longitudinal axis of the core means that there is a proliferation of applicator elements around the core allowing good loading of the eyelashes.

The applicator may comprise a stem to which the applicator member is secured, notably comprising a housing in which an end piece of the applicator member is held. Preferably the end piece extends along the longitudinal axis of the core.

Preferably, the applicator does not have a plane of symmetry.

The applicator member is preferably obtained by additive manufacturing. The fact that the applicator is obtained by additive manufacturing means that it is obtained in a single step, wherein the various elements constituting the applicator are made from the same material as each other without the need to use a mould.

The applicator member may be obtained on the basis of a preestablished digital model by solidification of a raw material, slice by slice, from one end of the applicator member to the other, in particular from its distal end to its proximal end or, preferably, from its proximal end to its distal end.

Preferably, the applicator member is made parially of a material selected from semi-crystalline thermoplastic materials, in particular a polyamide such as nylon 12. These materials make it possible to obtain parts having good mechanical strength and thermal resistance.

As an alternative, the applicator member is made of a material selected from materials which can be polymerized by irradiation with light, in particular photo- crosslinkable materials, materials which can be polymerized by catalysis, or materials which can be polymerized by application of heat, in particular thermo-crosslinkable materials. This allows production by an additive manufacturing process in which the material is solidified by irradiation with light, in particular using a laser, by localised catalysis or by localised application of heat.

As a further alternative, the applicator member is made of a material selected from ceramics or metals.

Preferably, the applicator member may have envelope surface of circular section.

The envelope surface may have any shape. Preferably, the envelope surface is cylindrical. As an alternative, the envelope surface section has a continuously variable dimension along the longitudinal axis of the core, in particular decreasing towards the ends of the applicator member, and possibly passing through one or more extrema. This notably facilitates the application of the cosmetic product to the eyelashes at the corner of the eye. The envelope surface is defined by the distal end of at least some of the applicator elements. For example, the envelope surface may have, seen from the side of the applicator member, a shape that is substantially polygonal, oval, in particular circular, ogival, oblong or a peanut shape.

The core may have, in cross section, a circular or polygonal shape

The core may be solid or hollow.

The core may comprise longitudinal openings. The latter allow product accumulation. This the autonomy of the application and its capacity for holding cosmetic product is increased. The openings may also allow a degree of flexibility of the core.

Preferably, the core comprises at least two helical grooves extending around the longitudinal axis of the core over more than one turn, in opposite directions and with the same pitch, the two grooves preferably being parallel to one another. Such grooves allow the formation of reserves of cosmetic product of the core.

Preferably, the or each helical groove forms a plurality of turns around the longitudinal axis of the core, in particular between 2 and 60 turns, better still between 3 and 40 turns over the entire length of the applicator member.

As a variant, the core is cylindrical.

The applicator elements may take the form of spikes or teeth.

The term“teeth” is understood as meaning applicator elements having at least one flattened cross section. The teeth can be as described in Patent Applications FR 3006566 and FR 3004905.

The applicator elements may each be solid or hollow.

Preferably, the row of applicator elements forms a plurality of turns around the longitudinal axis of the core, in particular between 2 and 60 turns, better still between 3 and 40 turns over the entire length of the applicator member. Such a number of turns allows the applicator member to have an appearance of being furnished with applicator elements and gives the impression that the applicator elements are arranged at random. The or each row may comprise a number of applicator elements between 2 and 500 elements, better still between 5 and 300.

The applicator elements may extend in at least two helical rows around the longitudinal axis of the core, in particular in the case where the core comprises at least two grooves, wherein the rows may be parallel to the grooves.

Preferably, the applicator elements in each row have their bases aligned with one another along a helix parallel to the groove or grooves.

The applicator member may comprise a row of applicator elements extending along the groove.

Preferably, consecutive applicator elements of a row are all spaced apart by the same distance, defined between the axes of extension of two consecutive applicator elements at their base, of between 0.1 mm and 5 mm, better still between 0.5 mm and 1 mm.

Preferably, the applicator elements extend in one or more helical rows forming spirals around the longitudinal axis of the core, and applicator elements extending from adjacent spirals along the longitudinal axis of the core are not superposed at their bases, when the applicator member is seen end-on, that is to say along its longitudinal axis.

Preferably, the applicator elements each extend along an axis of extension that is perpendicular to the longitudinal axis of the applicator member and/or towards a first longitudinal end of the applicator member, in particular the distal end.

The applicator elements may have the same shape or different shapes.

The applicator member may comprise two types of applicator element. Preferably, the applicator member comprises first applicator elements in the form of spikes and second applicator elements taking a different form to the first applicator elements, in particular in the form of teeth, loops and/or comprising one or more surface reliefs, for example one or more protuberances and/or an enlarged head. Preferably, the applicator elements of each type are all oriented in the same way relative to the radial axis of the core at their base.

The or each row of applicator elements may comprise alternating first applicator elements and the second applicator elements. This allows both good separation of the eyelashes and/or eyebrows, in particular by the spikes, and good loading of the eyelashes and eyebrows with cosmetic product, in particular by the applicator elements comprising at least one protuberance. As an alternative, each row of applicator elements contains a single type of applicator element, the adjacent rows of applicator elements comprising respective applicator elements which are different or otherwise. Preferably, the applicator elements are all oriented in the same way relative to the radial axis of the core at their base.

Preferably, the second applicator elements each comprise a body and one or more protuberances extending from the body.

Preferably, the body of the second applicator elements has a circular or polygonal cross section.

The body of the second applicator elements may extend along an axis of extension that is rectilinear or not. The axis of extension of the body of the second applicator elements may have a curved end portion, in particular in the form of a hook. The hook preferably extends perpendicular to the longitudinal axis of the core or toward the first end of the applicator member.

The body of the second applicator elements may comprise an enlarged distal end. The enlarged distal end is preferably flattened in a flattening plane. The flattening plane of the enlarged distal end is, preferably, a plane transverse to the longitudinal axis of the core. For example, the enlarged end of the body has the shape of a disc, a cross or a V.

The enlarged distal end may have a rounded shape, at least towards the outside. For example, the distal end may have the shape of a disc or umbrella. As an alternative, it may have a head with outwardly-oriented edges that are chamfered so as to limit outwardly- projecting comers. This results in a distal end with no projecting elements, making any contact between the applicator member and the eyelids gentler. The user will necessarily find this reassuring, and will be encouraged bring the application member right up close to the eye, allowing the cosmetic product to be applied to the base of the eyelashes, or encouraged to press the application member more firmly against the eyelashes and/or eyebrows, more effectively loading the eyelashes with cosmetic product.

The enlarged distal end may be solid.

As an alternative, the enlarged distal end is hollow. Its hollow aspect may give the applicator elements a degree of flexibility. It also makes it possible to collect product by surface tension and thus to increase the autonomy of the applicator and/or to increase the loading capacity of the applicator, without otherwise losing any capacity for separating and combing the eyelashes. The hollow at the distal end may comprise an opening outwards. Preferably, the enlarged distal ends of the second applicator elements are all solid, or the enlarged distal ends of the second applicator elements are all hollow.

At least one protuberance may extend from the distal half of the body of the second applicator element. This provides a reserve of product at a height on the applicator element, in other words at a non-zero distance from the core, making it more easily accessible to the eyelashes and/or eyebrows.

Preferably, the protuberances extend along axes of extension making at their base a non-zero angle with the axis of extension of the body of the corresponding applicator element, in particular making an angle of between 45 and 90°, preferably not perpendicular to the axis of extension of the corresponding body, better still between 60 and 75°. The protuberances may be oriented radially outwards or, preferably towards the longitudinal axis of the applicator member. This can facilitate penetration of the eyelashes between the applicator elements and improve catching of the eyelashes by the protuberances, which may help to smooth the product along their surface.

The protuberances each extend along an axis of extension which is rectilinear or curved.

At least two protuberances of a second applicator element, preferably of each second applicator element, may extend along axes of extension located, at the base of the protuberances, in different planes containing the longitudinal axis of the body. These planes may make an angle of between (but not including) 0 and 180° between them, preferably between 45 and 125°.

At least two protuberances of a second applicator element, preferably of each second applicator element comprising protuberances, may extend from opposite faces of the body.

At least two protuberances of a second applicator element, preferably of each second applicator element, may extend along axes of extension located, at the base of the protuberances, in the same longitudinal plane of the body.

At least two protuberances of a second applicator element, preferably of each second applicator element, may extend from the body at different heights on the latter relative to the base thereof. The two protuberances extending at different heights on the body may extend along axes of extension located at the base of the protuberances, in the same longitudinal plane of the body or in different longitudinal planes. The second applicator elements may each comprise at least three protuberances, one of which extends towards one end of the applicator member and the other two extending laterally with respect to the core and extending from opposite faces of the body.

The second applicator elements may form a loop comprising, or not comprising, surface reliefs. The loop may be connected to the core by two ends spaced apart from one another.

The loop may be open or closed.

The term“ open loop” means that the contour of the loop has an opening forming an opening. This may be positioned at a non-zero distance from the core, for example in the central portion, so as to separate the applicator element into two separate parts each connected to the core by one of the two connection feet. The opening may be positioned elsewhere, for example at the connection to the core such that the applicator element is connected to the core by a single foot.

The fact that the loop is open may allow eyelashes to pass through the opening and/or confer greater flexibility on wiping.

The opening may have a width less than or equal to 0.3 mm, better still less than or equal to 0.2 mm, even better still less than or equal to 0.1 mm.

Preferably, the second applicator elements are each symmetrical relative to a median plane. The second applicator elements may have or be without an axis of symmetry.

Preferably, the second applicator elements extend in a plane transverse to the longitudinal axis of the core, being inclined at their base relative to a radius starting from the core, in particular making an angle of between 0 and 90°, better still between 5 and 30°, even better still between 10 and 20°. This in particular makes it possible to limit the amount of space without applicator elements, in particular when the applicator is seen end-on, i.e. looking along the longitudinal axis of the core.

Preferably, the second applicator elements are perpendicular at their base to the surface of the core from which they extend.

As an alternative, the second applicator elements each have an axis of extension inclined at least partially towards the same longitudinal end of the applicator member. This in particular makes it possible to limit the amount of space without applicator elements when the applicator is seen from the side, i.e. looking perpendicular to the longitudinal axis of the core. The first applicator elements are, preferably, inclined at least partially towards the same longitudinal end of the applicator member.

The first applicator elements may be inclined relative to the radial axis of the core at their base by an angle of between 0 and 90°, better still between 5 and 30°, even better still between 10 and 20°. This in particular makes it possible to limit the amount of space without applicator elements, in particular when the applicator is seen end-on, i.e. looking along the longitudinal axis of the core.

Preferably, the first applicator elements have a circular or polygonal cross section.

The first applicator elements may extend along an axis of extension that is rectilinear or not. Their distal end may be curved and comprise a hook.

As an alternative, the first applicator elements have any other shape, in particular the shape of a tooth or a V shape. The distal end of the applicator elements without protuberances may be enlarged, preferably flattened in a flattening plane transverse to the longitudinal axis of the core. For example, the enlarged end of the body has the shape of a disc, a cross or a V.

The height of at least one applicator element, measured from the core, may be between 0.2 mm and 5 mm, even between 0.5 mm and 3 mm. The“ height of an applicator element” means the distance, measured along the axis of extension of the applicator element, between its free end and its base via which it is connected to the core.

Preferably, the height of the second applicator elements varies, for example in a monotonous manner, along the longitudinal axis of the core. According to one alternative, the height of the second applicator elements is constant along the longitudinal axis of the core. The height of the second applicator elements may decrease in the direction of the distal and proximal ends of the applicator member.

Preferably, the height of the first applicator elements varies, for example in a monotonous manner, along the longitudinal axis of the core. According to one alternative, the height of the first applicator elements is constant along the longitudinal axis of the core. The height of the first applicator elements may decrease in the direction of the distal and proximal ends of the applicator member, which may facilitate passing through the wiping member. Preferably, the distal ends of the second applicator elements define the envelope surface of the applicator member.

Preferably, the distal ends of the first applicator elements define a secondary envelope surface inscribed within the envelope surface of the applicator member. The secondary envelope surface may be spaced apart from the envelope surface of the applicator member, in cross section, by a constant distance.

As an alternative, the applicator member comprises only a single type of applicator elements of the same shape, in particular the shape of teeth, of a loop and/or comprising one or more surface reliefs, for example one or more protuberances and/or an enlarged head. Preferably, the applicator elements are as described above with reference to the second applicator elements.

A further subject of the invention is a device for packaging and applying a product to the eyelashes and/or eyebrows, comprising an applicator as defined above and a container containing the product.

The gripping member of the applicator may constitute a cap for closing the container. As an alternative, the gripping member of the applicator constitutes the container containing the product, the core is hollow and the applicator member comprises at least one opening for supplying the applicator member with product.

The container may comprise a wiping member suitable for wiping the stem and the applicator member.

The product is preferably a mascara.

A further subject of the invention is a method for producing an applicator according to the invention, as defined above, wherein a blank of the applicator member or the applicator member itself is produced in successive layers with relative movement of the part already built in the direction away from the build zone.

Such a method allows a monobloc applicator member to be produced, wherein the various elements constituting the applicator member are made from the same material as each other without the need to use a mould.

Such a method also allows the development of new forms of applicator member which in particular are impossible to produce by injection moulding because of the presence of undercuts.

The method may comprise: (i) production of a digital model of the applicator member,

(ii) solidification of a flowable raw material as a function of the digital model.

The raw material may be liquid, in particular a photo-crosslinkable or powdery material.

In the case of a photo-crosslinkable raw material, in step (ii), the raw material may be solidified slice by slice, by irradiation of the photo-crosslinkable raw material.

In the case of a powdery raw material, step (ii) can be performed by sintering the powdery raw material layer by layer.

The method of production by additive manufacturing may be a method of filament deposition printing (FDM), stereolithography (SLA), Multi Jet Fusion (MJF), Selective Laser Sintering (SLS) or Digital Light Processing (DLP), in particular CLIP (Continuous Liquid Interface Production), preferably MJF.

Preferably, the production process is a Multi Jet Fusion technique. This method may comprise the steps consisting of:

a) depositing a layer of powdery material on a printing substrate, b) dispensing one or more coalescence agents and coalescence modifiers onto parts of the layer which are determined on the basis of the digital model of the applicator member,

c) applying energy to the layer of powdery material, in particular by irradiation with infrared or near infrared light, so as to cause at least partial fusion of the parts on which the coalescence agent or agents have been applied,

d) cooling the layer of powdery material to solidify the fused parts, e) repeating steps a) to d), the layer of powdery material previously deposited forming the printing substrate, in order to produce continuously, in by successive layers, solid parts and adhering to one another so as to form the application member.

The powdery material may be a material in powder form selected from a semi crystalline thermoplastic material, in particular a polyamide such as nylon 12 or PA220, preferably pure, metal, composite, ceramic, glass, resin or polymer.

The coalescence agent or agents may be a compound of an ink type comprising carbon black, such as for example the ink compound CM997A available in particular from the Hewlett-Packard Company. The coalescence agent or agents may additionally comprise an infrared and/or near infrared and/or visible light absorber, in particular the ink compounds CE039A and CE042A available in particular from the Hewlett-Packard Company.

The coalescence modifying agent or agents may be a colloidal ink, a dye-based ink or a polymer-based ink. The coalescence modifying agent or agents may comprise solid compounds or compounds in solution, in particular may be a saline solution. The coalescence modifying agent or agents may be the ink compound CM996A or CN673A available in particular from the Hewlett-Packard Company. Preferably, the layer of powdery material has a thickness of between 90 and 110 microns.

Preferably, the printing plate has a dimension ranging from 10 cm x 10 cm, to 100 cm x 100 cm.

The method for producing the applicator may be as described in international application W02015106816.

As an alternative, the method for production by additive manufacturing comprises:

a) localized irradiation by a light source, notably a laser, in a predefined build zone, of a fluid photo-crosslinkable material contained in a vat so as to from one or more polymerized solid parts in the polymerizable material in said build zone, the polymerized solid part or parts being attached to a substrate, the irradiation site or sites in the predefined build zone being determined on the basis of the digital model of the applicator member, b) moving the substrate and the polymerized solid parts attached to the latter relative to the light source, in the direction away from the build zone so as to release the polymerized solid parts from the build zone, the build zone once again filling up with fluid photo-crosslinkable material,

c) repeating steps a) and b) so as to continuously produce, in successive layers, solid parts, adhering to one another, so as to form the applicator member.

The vat comprises, preferably, a surface in fluid communication with a source of polymerization inhibitor, step a) being performed while forming or keeping a fluid zone between the predefined build zone and said surface, in which fluid zone the polymerization of the fluid photo-crosslinkable material is inhibited by the polymerization inhibitor.

Preferably, the polymerization inhibitor is oxygen.

Preferably, the fluid zone has a height of less than or equal to 1 mm, preferably between 500 pm and 0.01 pm, better still between 100 pm and 10 pm. Preferably, the localized irradiation and the movement of the substrate are continuous, the fluid zone and the build zone having at their interface a polymerization gradient such that the production of the applicator member is substantially continuous. This makes it possible to limit the presence of visible strata as found in methods for production by additive manufacturing that produce the object layer by layer.

The method comprises, preferably, an additional step of heating the applicator member formed. This allows hardening of the structure of the applicator member produced and smooths out its surface.

The method comprises, preferably, an additional step of heating the applicator member formed. This improves polymerization of the material of the applicator member produced. The method for producing the applicator may be as described in international applications WO2014126830 and WO2014126837.

The invention also relates to a method for making up the eyelashes and/or eyebrows using an applicator according to the invention as defined above, in which the product is applied by bringing the applicator into contact with the eyelashes and/or eyebrows.

Brief description of the drawings

The invention may be better understood from reading the following detailed description of non-limiting implementation examples thereof, and with reference to the appended drawing, in which:

[Fig 1] shows an application and packaging device according to the invention, [Fig 2] is a side view of an applicator member of an applicator according to the invention,

[Fig 3] is a perspective view of the applicator member of Figure 2,

[Fig 4] is an end-on view along IV of the applicator member of Figure 2 or 3, [Fig 5] shows the detail V of the applicator member of Figures 2 and 3,

[Fig 6] shows an applicator element of the applicator member of Figure 2,

[Fig 7] is a view along VII of the applicator element of Figure 6,

[Fig 8] shows a cross section along VIII- VIII of Figure 2,

[Fig 9] shows a longitudinal section along IX-IX of Figure 2,

[Fig 10] is a view of a detail according to X of Figure 7, [Fig 11] is a schematic perspective representation in profile of an alternative applicator member of an applicator according to the invention,

[Fig 12] is a view of a detail of the applicator member of Figure 11,

[Fig 13] is a cross section through the applicator member of Figure 11,

[Fig 14] a and b show an applicator element of the applicator member of Figures 11 to 13,

[Fig 15] shows an envelope surface of the applicator member of Figures 11 to 14,

[Fig 16] shows an envelope surface of the applicator member of Figures 11 to 14,

[Fig 17] is a cross section through the applicator member of Figures 11 to 16, [Fig 18] is a cross section through the applicator member of Figures 11 to 16, [Fig 19] is a schematic perspective representation in profile of an alternative applicator member of an applicator according to the invention,

[Fig 20] is an end-on view of the applicator member of Figure 19,

[Fig 21] shows an applicator element of the applicator member of Figures 19 and

20,

[Fig 22] shows the envelope surface of the applicator member of Figures 19 and

20,

[Fig 23] shows a cross section through the applicator member of Figures 19 and

20,

[Fig 24] is a schematic perspective representation of an alternative applicator member of an applicator according to the invention,

[Fig 25] is an end-on view of the applicator member of Figure 24,

[Fig 26] shows a detail of the applicator member of Figures 24 and 25,

[Fig 27] shows an applicator element of the applicator member of Figures 24 and 25,

[Fig 28] is a schematic perspective representation of an alternative applicator member of an applicator according to the invention,

[Fig 29] is an end-on view of the applicator member of Figure 28,

[Fig 30] shows a detail of the applicator member of Figures 28 and 29,

[Fig 31] shows, in cross section, the applicator member of Figures 28 and 29, [Fig 32] a to f show steps in the production of the applicator member according to the invention,

[Fig 33] shows a device for producing the applicator member according to the production steps of Figures 32a-f,

[Fig 34] shows a first step of an alternative method for producing the applicator member according to the invention, and

[Fig 35] shows a second step of the alternative method for producing the applicator member according to Figure 34.

Detailed description

Figure 1 shows a packaging and application device 1 produced in accordance with the invention, comprising an applicator 2 and an associated container 3 containing a product P to be applied to the eyelashes and/or eyebrows, for example mascara or a care product.

The container 3 comprises, in the example in question, a threaded neck 4 and the applicator 2 comprises a closure cap 5 designed to be fastened on the neck 4 so as to close the container 3 in a sealed manner when it is not in use, the closure cap 5 also constituting a gripping member for the applicator 2.

The container 3 may also be produced differently.

The container 3 also comprises a wiping member 6, for example inserted into the neck 4.

The applicator 2 comprises a stem 7 of longitudinal axis Y, which is attached at its upper end to the closure cap 5 and at its lower end to an applicator member 8. The latter comprises a core 10 bearing applicator elements 18 that extend from the core 10 and all around the latter.

This wiping member 6, which may be any wiping member, comprises, in the example in question, a lip designed to wipe the stem 7 and the applicator member 8 when the applicator 2 is withdrawn from the container 3. The lip defines a wiping orifice 6a having a diameter adapted to that of the stem.

The wiping member 6 may be made of elastomer.

The wiping member 6 may comprise a wiping orifice 6a with a circular shape, optionally with slots. The diameter of the wiping orifice 6a of the wiping member 6 is for example between 2.5 and 6 mm, being for example around 3.5 mm or 5 mm.

The wiping member 6 may optionally have undulations, allowing the wiping orifice to widen more easily when the applicator member 8 passes through.

The wiping member may also be adjustable, if appropriate.

In the example illustrated, the stem 7 has a circular cross section, but it would not constitute a departure from the scope of the present invention if the stem 7 had a different cross section, it then being possible to fasten the cap 5 on the container 3 in some other way than by screwing, if necessary. The wiping member 6 is adapted to the shape of the stem 7 and to that of the applicator member 8, if appropriate.

Preferably, and as in the example in question, the longitudinal axis Y of the stem 7 is rectilinear and coincident with the longitudinal axis of the container 3 when the applicator 2 is in place thereon, but it would not constitute a departure from the scope of the present invention if the stem 7 were not rectilinear, forming for example an elbow.

If need be, the stem 7 may have an annular narrowing at its portion that is positioned opposite the lip of the wiping member 6, so as not to mechanically stress the latter unduly during storage.

The stem 7, to which the applicator member 8 is fixed, may be at least partially, and in particular completely, flexible, in particular in the vicinity of the applicator member.

The applicator member 8 may be fixed to the stem 7 by any means, and in particular by force-fitting, snap-fastening, adhesive bonding, welding, stapling or crimping, in a corresponding housing provided at the end of the stem 7.

As shown in Figure 2, the applicator member 8 may comprise an end piece 9 for fastening it in a corresponding housing in the stem 7.

One example of an applicator member according to the invention will now be described with reference to Figures 2 to 9.

The applicator member 8 comprises a core 10 and a plurality of applicator elements 18 extending from the core 10.

The core 10 is elongate along a longitudinal axis X. The longitudinal axis X is rectilinear but, as an alternative, could have any other shape, in particular curved. The longitudinal axis X is central, but this could be different.

The length H of the core 10 is, for example, between 15 mm and 27 mm. As shown in Figures 8 and 9 in particular, the core 10 comprises two grooves 16 and 17 each turning around the longitudinal axis of the core X following respective helices 13 and 15. The two helices 13 and 15 are opposite one another relative to the longitudinal axis X and have the same pitch. The helices 13 and 15 run around the axis X over more than one turn, in particular over more than 6 turns, for example over substantially 8 turns.

The applicator member 8 comprises two rows of applicator elements 18 extending around the core, each following the helical path of one of the two helices 13 and 15. These rows extend between the two grooves 16 and 17, preferably at the same distance from the latter. This does not have to be the case. For example, according to one alternative, the applicator member 8 comprises rows of applicator elements that do not follow the helical path of the grooves 16 and 17. The rows of applicator elements 18 may be helical but extend along helical grooves 16 and 17.

As an alternative, the core is a solid cylinder and the rows of applicator elements 18 extend helically or along the longitudinal axis of the core X.

Each row comprises, for example, between 2 and 500 applicator elements, better still between 5 and 200 applicator elements.

The application elements are aligned with each other at their base along the corresponding row.

Each row comprises two types of applicator element, alternating with one another:

- applicator elements 18a comprising a body 20 and protuberances 22 extending laterally from the body 20, and

- applicator elements 18b in the form of spikes.

The applicator elements 18b comprise a circular section and taper towards their distal end. As shown in Figure 9, the applicator elements 18b may all be inclined towards the distal end 11 of the applicator member 8 relative to a radius at their base, by the same angle a of between 0° and 90°, better still between 5 and 30°, even better still between 10 and 20°, for example substantially equal to 15°.

The bodies 20 of the applicator elements 18a may be in the form of spikes with a circular section and tapering towards their distal end. As shown in Figure 8, the bodies 20 of the applicator elements 18a may extend along an axis of extension C in a plane transverse to the longitudinal axis of the core 10. The axes of extension may all be inclined relative to the radial axis R at their base by the same angle b of between 5° and 25°, for example substantially equal to 15°. The bodies 20 of the applicator elements 18a may thus be transverse to the longitudinal axis X of the core and inclined relative to the radial axis R at their base.

The applicator elements 18a comprise several protuberances 22 extending along three sides of the body 20. As shown in Figure 8, the applicator elements 18a may comprise one or more protuberances 22a and 22b each extending along an axis of extension P contained in a transverse plane of the core 10, and one or more protuberances 22c each extending along an axis of extension contained in a longitudinal plane of the core towards the distal end 11 of the applicator member 8. The protuberances 22a and 22b may extend on either side of the body 20. None of the applicator elements 18 comprise protuberances extending towards the proximal end 13 of the applicator member 8.

As shown, the protuberances 22 are all of substantially identical shape, but this does not have to be the case.

The protuberances 22a and 22b extend from the body at the same height h and are symmetrical with one another relative to a median plane M. As can be seen in Figure 7, the protuberances 22c extend from their base at a height on the body that is different to that of the protuberances 22a and 22b. The difference in height d on the body 20 of the protuberances 22c and 22a or 22b may be between 0 and 1.5 mm.

In the case where the applicator elements comprise several protuberances 22a, respectively 22b or 22c extending from the same side of the body, the latter may be identical and be connected to the body at different heights h along the latter. In the example shown, the protuberances 22a or 22b extending from the same side of the body 20 are spaced apart by a height h a of between 0.05 and 2 mm, better still between 0.1 mm and 1mm. The protuberances 22c extending from the same side of the body 20 are spaced apart by a height h a of between 0.1 and 3 mm, preferably between 0.5 and 1 mm. The height h, is greater than the height h a .

The height L of the body, measured from the core along the rectilinear part C a of the axis of elongation C, from the base of the applicator element 20 p to its distal end 20 d , may be between 0.2 mm and 5 mm, preferably between 0.5 mm and 3 mm.

The axes of extension P of the protuberances 22a, 22b and 22c all make for example, as shown, an angle g with the axis of extension C of the body of between 45° and 135°, preferably other than 90°. In the example shown, the protuberances extend partially in the direction of the base of the corresponding applicator element 18a, the angle g being for example substantially equal to 65°.

Each applicator element 18a is symmetrical relative to a median plane M but this does not have to be the case.

Preferably, the applicator elements 18a comprise protuberances 22 extending over the upper half of the applicator element so as to constitute reserves of product at a height.

As shown in Figure 10, all of the protuberances 22 of the applicator elements 18a are such that, for all of the cross sections T of the protuberance 22, moving in the direction from the base 23 of the protuberance 22 towards its distal end 24, each point on the outer surface of the protuberance is connected to at least one point on the outer surface of the protuberance of each subsequent cross section by a vector V p oriented perpendicular to the longitudinal axis X and/or oriented towards the distal end 11 of the applicator member 8. Thus, in the case shown, the point B2 on the outer surface of the protuberance 22c of cross section T2 is connected to the point B 1 on the outer surface of the protuberance 22c of cross section Ti by the vector V p having a vectoral component Vpperp perpendicular to the longitudinal axis X and a vectoral component Vppar oriented towards the distal end 11 of the applicator member 8.

The applicator elements 18a define, by their distal ends, an envelope surface Si, shown in Figure 3, in which the applicator member 18 is inscribed. The envelope surface Si is of substantially cylindrical shape, with the exception of its distal end which has a smaller diameter.

The applicator elements 18b may define, by their distal ends, an additional envelope surface S2, shown in Figure 4, inscribed within the envelope surface Si and having the same shape. The distance e between the additional envelope surface S2 and the envelope surface Si may be constant, and in particular between 0 and 3 mm, for example substantially equal to 0.5 mm. Thus, the applicator elements 18b may be smaller than the adjacent applicator elements 18a, the distance between the distal ends of adjacent applicator elements 18a and 18b, in projection along an axis transverse to the core 10, being equal to the distance e. In the embodiment described above, the protuberances 22 all have the same shape, but this does not have to be the case. For example, the protuberances 22c have a different shape to the protuberances 22a and 22b, in particular owing to their different orientations relative to the core.

Other embodiments of the invention are described below with reference to Figures 11 to 31. They differ from the first embodiment by virtue of the shape of the applicator elements 18 and their arrangement on the core 10.

Only the differences between these embodiments and the first embodiment are described.

In the example shown in Figures 11 to 16, each applicator element 18a comprises a body 20 and two protuberances 22a and 22b extending laterally from the body 20. The body 20 comprises an enlarged distal end 20b.

The enlarged distal end 20b of each body 20, as shown in Figure 14a, may be rounded, in particular in the form of a disc

Preferably, the distal end is flattened along a plane of symmetry Mo of the applicator element as shown in Figure 14b, in such a way that it does not project laterally beyond the base. In this example, the applicator element is delimited in profile view by two parallel planes Mi; M2. The latter are spaced apart by a distance D which is smaller than or equal to the largest dimension of the base of the applicator element. However, this does not have to be the case and the distal end 20b could be not flattened.

The applicator elements 18a extend along axes of extension Y which are all inclined relative to the radial axis R at their base, in particular by the same angle b. The axes of extension Y may extend in a plane transverse to the longitudinal axis X or, preferably, be inclined relative to such a transverse plane.

The applicator elements 18b are all inclined relative to the radial axis R at their base, in particular by the same angle a. The applicator elements 18b may extend in a plane transverse to the longitudinal axis X or, preferably, be inclined relative to such a transverse plane.

The length d of the enlarged distal part 22, measured along the axis of elongation Y, is for example greater than or equal to 0.1 mm, better still 0.5 mm.

The ratio d/l , where l denotes the total height of the body 20, is for example between 15% and 50%. The applicator elements 18a each comprise two protuberances 22a and 22b each extending along an axis of extension P contained in the same plane, in particular oriented circumferentially around the core. The protuberances 22a and 22b extend on either side of the body 20.

The protuberances 22a and 22b, as shown, are all of substantially identical shape. They have a constant cross section and a rounded distal end. As an alternative, the cross section may vary, in particular decreasing towards their distal end.

The protuberances 22a and 22b extend from the body at the same height h, being symmetrical to one another relative to the axis of extension Y.

The axes of extension P of the protuberances 22a and 22b each make an external angle g with the axis of extension Y of the body of between 45° and 135°. In the example shown, the protuberances extend in the direction of the free end of the corresponding applicator element 18a, the angle g being substantially equal to 120°.

The applicator elements 18a comprise protuberances 22a; 22b extending over the distal half of the applicator element, in such a way as to constitute reserves of product at a distance from the core.

Preferably, each applicator element 18a is symmetrical relative to a median plane M, but this does not have to be the case.

In the example in question, as can be seen in particular in Figures 15 to 17, the free ends of the applicator elements 18a define an envelope surface S I of the applicator member 8, the longitudinal axis of which is rectilinear and coincident with the longitudinal axis X of the core 10. The envelope S I has symmetry of revolution about this axis X, and in particular has the shape of a peanut, i.e. an elongate cylindrical shape narrowing at its centre, as can be seen in particular in Figure 6. The envelope surface S 1 has, in the example shown, a cross section that varies over the entire length of the applicator member 8, with in particular three local minima, at points corresponding substantially to the distal end of the applicator member, to the middle of the length H of the applicator member 8 and to the proximal end of the applicator member.

The applicator elements 18b are substantially identical to the additional applicator elements described with reference to the first embodiment.

They differ from those described above in that the angle a is between 0° and 10°, for example substantially equal to 5°. In the embodiment of Figures 19 to 23, the applicator member 8 comprises only one type of applicator element 18 extending from the core 10.

The applicator elements 18 each comprise a body 20 and two protuberances 22 projecting on the surface of the body 20. The latter comprises a rectilinear portion 20a extending from its base and a bent distal end 20b, preferably in the form of a hook.

Preferably, the body 20 extends along an axis of elongation C with a rectilinear part at the rectilinear portion 20a and a curved part at the bent distal end 20b of the body 20. The axis of elongation C may have a curve with a radius of curvature r of between 0.2 and 2 mm, preferably substantially equal to 0.3 mm.

Preferably, the distal end 20b of the body extends in an arc of a circle of angular extent l of between 90° and 180°, better still between 135° and 180°, for example substantially equal to 150°.

Preferably, the rectilinear portion 20a has a cross section that decreases from the base towards the distal end 20b.

Preferably, the axis of elongation C extends in a plane transverse to the longitudinal axis of the core.

The protuberances 22 are also bent. They extend along an axis of extension P contained in the same plane as the body 20, in particular in a plane transverse to the longitudinal axis X of the core 10. The protuberances 22 preferably extend from the same side of the body 20 as the distal end 20b. They extend at different heights on the body 20, starting from the rectilinear portion 20a of the body.

Preferably, the axes of extension P of the protuberances are curved and have a radius of curvature r p substantially identical to that r of the distal end 20b. Preferably, the protuberances extend in an arc of a circle of angular extent l r which is less than the distal end 20b.

Preferably, the distal end 20a and the protuberances 22 extend laterally from the body 20 over the same distance d from the rectilinear part of the axis of elongation C.

As shown in Figure 23, the applicator elements 18 preferably extend radially, i.e. the rectilinear part of their axis of elongation C is substantially coincident with a radius Y starting from the axis X at their base.

As can be seen in Figures 19 and 20, the applicator elements 18 are arranged in two helical rows entwined around the longitudinal axis X of the core. The distal ends 20b of the applicator elements 18c of the first row are, preferably, oriented on a side of the rectilinear portion 20a of the body opposite to that of the applicator elements 18d of the second row. This enhances the effect of proliferation of the applicator elements on the core when viewed end-on, as shown in Figure 20.

In the example in question, as can be seen in particular in Figure 22, the free ends of the applicator elements 18 define an envelope surface S of the applicator member 8, the longitudinal axis of which is rectilinear and coincident with the longitudinal axis X of the core 10. The envelope S has symmetry of revolution about this axis X, having in particular a cross section reaching a maximum at its centre, i.e. having a portion with a section that increases from the proximal end towards the distal end, and then a portion with a section that decreases as far as the distal end. The envelope surface S 1 has, in the example shown, a cross section that varies over the entire length of the applicator member 8.

In the embodiment shown in Figures 24 to 27, the applicator member 8 comprises applicator elements 18a in the form of a loop and applicator elements 18b in the form of spikes.

The applicator elements 18a extend from the core via two rectilinear feet 20a connected to one another at their distal ends by a rounded portion 20b. The rounded portion 20b comprises, on its surface oriented outwards, reliefs 40 in the form of several bosses separated from one another by a recess. Such reliefs allow the formation of reserves of product.

The applicator elements 18a extend radially in a longitudinal plane of the core

10.

The applicator elements 18b extend radially.

In this embodiment, the applicator elements 18a and 18b are not alternating within the helical rows. The applicator member 8 comprises two entwined helical rows, one of the rows being a row of applicator elements 18a in the form of loops as described above, and the other row being a row of applicator elements 18b in the form of spikes.

In the embodiment shown in Figures 28 to 31, the applicator member 8 comprises applicator elements 18a in the form of a loop and applicator elements 18b in the form of spikes. The applicator elements 18a extend from the core via two feet 20a connected to one another at their distal ends by a rounded portion 20b, as shown in Figure 31. The feet 20a are undulating but could, as an alternative, be rectilinear.

The applicator elements 18a extend in a transverse plane of the core 10.

The applicator elements 18b in the form of spikes extend radially. The applicator elements 18a may extend along an axis of elongation C that makes a non-zero angle b with a radius at the base of the applicator element 18a, as shown in Figure 31.

In this embodiment, the applicator elements 18a and 18b are not alternating within the helical rows. The applicator member 8 comprises four entwined helical rows. Two of the rows are rows of applicator elements 18a in the form of loops as described above, extending over the strands of material 12 and 14 respectively from the core 10 between the grooves 16 and 17, and the two other rows are rows of applicator elements 18b in the form of spikes extending in the grooves 16 and 17 respectively, as shown Figures 28 and 30.

The invention is not limited to the embodiments described above. In particular, the shapes of applicator elements of the various embodiments may be combined with the various arrangements of applicator elements on the core described above.

The applicator elements may have shapes other than those described above.

For example, the applicator element may comprise one or more protuberances in the form of a spout oriented outwards or towards the core and being connected to the core by flat, concave or convex surfaces, in the form of a triangle connected to the body by one of its edges, in the form of a boss of the body, in the form of a hook oriented towards the base or outwards, in the form of a loop or in the form of a mushroom.

The applicator element may again have an enlarged distal end in the form of a half-disc. The enlarged distal end may be solid or hollow.

The applicator elements may take the form of teeth comprising or not comprising one or more projecting reliefs, spikes having one or more bends, in the form of a V or an X or having a V or an X at the end, or in the form of an open loop.

The applicator elements may be without an axis of symmetry.

In the examples shown, the applicator elements 18a of the applicator members are all of one or two types. The applicator member may comprise more than two different types of applicator elements. The application member 8 may be produced by means of a device for production by additive manufacturing, on the basis of a digital model of the applicator member 8.

The digital model faithfully represents the application member 8 in three dimensions, and may be generated using computer-assisted design software such as SolidWorks 3D.

As shown in Figures 32a-f and 33, the production device 50 may comprise a printing substrate 51, a powdery material dispenser 53 for depositing a layer of powdery material 63 on the printing substrate 51, a first agent dispenser 55 for depositing one or more coalescence agents 65 on the layer of powdery material 63, a second agent dispenser 57 for supplying one or more coalescence modifying agents 67 and a source of energy 59.

During production, the powdery material dispenser 53 deposits a first layer of powdery material 63 over the whole surface of the printing substrate 51 as shown in Figure 32a, moving the material dispenser 53 along the axis Yd. One or more coalescence agents 65 and/or coalescence modifiers 67 are then deposited on the parts of the layer 63, as shown in Figure 32a, by moving the associated dispensers along the axis Yd. The parts of the layer 63 on which the agents 65 and the modifiers 67 are deposited are determined according to the digital model created beforehand.

Once the coalescence agents 65 and coalescence modifiers 67 have been deposited, they penetrate the layer 63 at least partially, as can be seen in Figure 32b. Finally, energy is applied to the whole of the layer 63 using the source 51. Applying this energy causes at least partial fusion of the parts on which the coalescence agent or agents 65 have been applied, thus allowing, once the layer has cooled, the molten parts to solidify as shown in Figure 32c. The modifiers 67 make it possible to obtain distinct edges of the fused zones by preventing fusion of the peripheral zones. After the layer of material 63 has been treated, as described above, a new layer 73 of powdery material is deposited on the layer 63 treated previously, as shown in Figure 32d. The process explained above may then be repeated to generate the three-dimensional applicator member layer by layer as shown in Figures 32d-f.

During production, the substrate 51 moves along the axis z in such a way that, as new layers of material are deposited, a predefined gap is maintained between the surface of the layer deposited most recently and the dispensers 55 and 57. As an alternative, the substrate 51 does not move along the axis z and the dispensers 55 and 57 may move along this axis. Preferably, the applicator member 8 is produced by means of this device from its proximal end 13, i.e. the end intended to be attached to the stem 7, to its distal end 11. The reverse is also possible.

Such a production method, suitable for making the applicator, is described in particular in international application W02015106816

As an alternative, the applicator member 8 is produced using a different device for production by additive manufacturing, in particular by light irradiation of a photo- crosslinkable material, as shown in Figures 34 and 35. In the example in question, the production device may comprise a light source 40, a vat 42 arranged above the light source 40 and a substrate 46. The vat 42 is at least partially transparent to the radiation emitted by the light source. It contains a liquid photo-crosslinkable material 44.

During production, the light source 40 is operated in accordance with the digital model to crosslink the liquid material 44 in a build zone between the substrate 46 and the plate 42, following a pattern dependant on the digital model. The cross-linked parts of the liquid material 44 are solid. Before production, as shown in Figure 34, the substrate 46 is immersed in the liquid material 44 and the build zone is in contact with the substrate 46, in such a way that the liquid material 44 is crosslinked on the substrate 46, becoming attached to the latter. During production, as shown in Figure 35, the substrate 46 is moved away from the light source 40 at the speed of production of the applicator member 8, such that the crosslinked parts are produced in successive layers, each crosslinked layer becoming attached to the one before.

The vat 42 may have a surface 48 between the substrate 46 and the light source 40 which is in fluid communication with a source of polymerization inhibitor, in particular a source of oxygen. The polymerization inhibitor makes it possible to keep the liquid material 44 in liquid form by preventing it from polymerizing by light irradiation, in a fluid zone of non-zero thickness. This fluid zone extends from the surface 48 to the build zone and allows the liquid to flow to the build zone. Preferably, the fluid zone has a height of between 10 pm and 100 pm.

It may be that the interface between the fluid zone and the build zone is not distinct but may be formed with a polymerization gradient. In this case, the substrate 46 is moved continuously and the irradiation by the light source 40 is continuous. Preferably, the applicator member 8 is produced using this device, from its proximal end 13 to its distal end 11. The reverse is also possible.

After the applicator member 8 has been produced, it is detached from the substrate 46 and heated to harden and smooth out the structure.

Such a production method, suitable for making the applicator, is described in particular in international applications WO2014126830 and WO2014126837.

As an alternative, the applicator member 8 is produced using a different device for production by additive manufacturing, in particular by filament deposition printing (FDM), stereolithography (SLA) or Selective Laser Sintering (SLS).

The invention is not limited to the exemplary embodiments described above.

The device may comprise a reservoir of product and the applicator may be mounted by its proximal end 13 on the reservoir. In this case, the applicator comprises a hollow core and at least one opening for supplying the applicator with cosmetic product.