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Title:
BEVELED APPLICATION MEMBER WITH CONVEX SIDE PROFILE
Document Type and Number:
WIPO Patent Application WO/2018/224275
Kind Code:
A1
Abstract:
The present invention relates to a cosmetic application member (6) with longitudinal axis (X) having a bundle (20) of synthetic polymer fibers (41), the fibers (41) extending at least partially along the axis (X), and the bundle (20) having a central core (43) and an outer envelope (42), the bundle(20) continuing, in a direction away from its distal end (13), by delimiting an end face (26) which defines, in longitudinal section along the axis (X), a bevel of angle (β) at the distal end of the application member (6).

Inventors:
LEBRAND, Jean-Marc (9 Rue Pierre Dreyfus, Clichy, 92110, FR)
THENIN, Audrey (9 Rue Pierre Dreyfus, Clichy, 92110, FR)
DELATTRE, Camille (188 Rue Paul Hochart - BP553, Chevilly La Rue, Chevilly La Rue, 94550, FR)
Application Number:
EP2018/062852
Publication Date:
December 13, 2018
Filing Date:
May 17, 2018
Export Citation:
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Assignee:
L'OREAL (14 rue Royale, PARIS, PARIS, 75008, FR)
International Classes:
A46B9/02; A46B3/02
Foreign References:
DE202004020008U12005-02-24
EP1302127A22003-04-16
US20140257208A12014-09-11
FR3041512A12017-03-31
US20160135657A12016-05-19
FR2933281A12010-01-08
FR2836031A12003-08-22
EP1302127A22003-04-16
Other References:
"Asker Product Information, Asker Durometer type JA", 2016, KOBUNSHI KEIKI CO.
Attorney, Agent or Firm:
BOURDEAU, Françoise (D.I.P.I, 9 Rue Pierre Dreyfus, Clichy, 92110, FR)
Download PDF:
Claims:
CLAIMS

1. A cosmetic application member (6) with longitudinal axis (X) having a bundle (20) of synthetic polymer fibers (41), the fibers (41) extending at least partially along the axis (X), and the bundle (20) having a central core (43) defined by a first hardness, and an outer envelope (42) arranged around the central core (43) and formed by fibers (41) at least partially bonded to each other by a resin, the outer envelope (42) being defined by a second hardness, the ratio of the second hardness to the first hardness is between 1.2 and 100, the bundle (20) continuing, in a direction away from its distal end (13), by delimiting an end face (26), characterized in that the end face (26) defines, in longitudinal section along the axis (X), a bevel of angle (β) at the distal end of the application member (6).

2. The application member as claimed in claim 1, characterized in that the angle (β) is between 5° and 85°, preferably between 10° and 70°.

3. The application member as claimed in either one of the preceding claims, characterized in that the ratio of the second hardness to the first hardness is between 1.3 and 7.0, preferably between 1.9 and 7.0. 4. The application member as claimed in any one of the preceding claims, characterized in that the bundle (20) divides, in a direction away from its distal end (13), into a portion (23) of fibers (41) which are at least partially separable and of which the free ends define the end face (26). 5. The application member as claimed in any one of the preceding claims, characterized in that, on at least one portion of its height, it has a convex side profile (31), with the convexity directed toward the inside, when the application member is viewed from the front in a direction perpendicular to the axis X. 6. The application member as claimed in any one of the preceding claims, characterized in that the end face (26) is at least partially flat.

7. The application member as claimed in any one of the preceding claims, characterized in that the end face (26) is at least partially concave, with the concavity directed toward the inside of the application member. 8. The application member as claimed in any one of the preceding claims, characterized in that the end face (26) extends along the longitudinal axis (X) over a distance (1) greater than or equal to 2 mm, the distance (1) ranging in particular from 2 mm to 15 mm.

9. The application member as claimed in any one of the preceding claims, characterized in that the end face (26) is spaced apart, at at least one point, from the longitudinal axis (X) by a distance (k) greater than or equal to 2 mm, the distance (k) ranging in particular from 2 mm to 6 mm.

10. The application member as claimed in any one of the preceding claims, characterized in that it has, over at least one portion of its length measured along the longitudinal axis (X), a circular cross section.

11. A cosmetic applicator (6) comprising a holder (15) whereon at least one application member (3) as claimed in any one of the preceding claims is mounted.

12. The applicator as claimed in claim 11, comprising a stem (5) provided with at least one air uptake orifice (11).

13. A packaging and application device (1) comprising:

- a container containing a cosmetic product (P) to be applied,

- an applicator (3) as claimed in either one of claims 11 and 12.

14. A method for manufacturing an application member as claimed in any one of claims 1 to 10, comprising the steps consisting in:

a. producing a blank of an application member with longitudinal axis (X) formed by a bundle (20) of synthetic polymer fibers (41) having a central core (43) formed of fibers (41) that are at least partially extended along the axis (X) and an outer envelope (41) arranged around the central core (43) and formed by fibers (41) at least partially bonded to each other by a resin, the hardness of the outer envelope (41) being greater than the hardness of the central core (43),

b. grinding a portion of the blank, in particular perpendicularly to the axis (X) of the application member,

c. machining the distal end (33) of the application member (6), optionally by grinding perpendicular or tangent to the fibers (41),

d. optionally, cutting the fibers (41) so as to form the end face (26).

15. A cosmetic method for applying a product to a body surface, comprising the operations consisting in:

(i) providing an applicator (3) as claimed in either one of claims 11 and 12,

(ii) optionally, picking up a cosmetic product in a container (2) with the end face (26),

(iii) bringing the end face (26) into contact with the body surface,

(iv) spreading the product on the body surface by moving the applicator (3) over the body surface, optionally by modifying the inclination between the end face (26) and the body surface or by turning the application member (6) about its longitudinal axis (X).

Description:
Beveled application member with convex side profile

Field of the invention

The present invention relates to applicators for applying a cosmetic product to human keratin materials and more particularly, but not exclusively, to applicators for applying nail varnish, eyeliner, lip product or eyeshadow.

The invention also relates to a packaging and application device and to a makeup method.

The expression "cosmetic product" is understood to mean any product as defined in Regulation (EC) No 1223/2009 of the European Parliament and of the Council of November 30, 2009 on cosmetic products.

Prior art and objectives of the invention

Among known application devices, some have a container provided with a threaded neck on which there can be fixed a closure cap which bears a stem provided at its end with an applicator end piece that is generally produced by injection-molding thermoplastic material with a flocked coating. A wiping member is usually positioned in the neck in order to wipe off the stem and reduce the quantity of product taken up when the applicator is withdrawn.

Applicator pens, which are more practical to use, are also known. However, the performance of these pens is sometimes inferior to that which it is possible to obtain with complex shapes of known applicator end pieces that are produced by injection-molding or by machining a felt tip.

FR 2 933 281 describes an applicator comprising a stem and an applicator end piece that is borne by the stem, which is able to deform during use and which makes it possible, depending on the orientation selected, to draw two lines with different thicknesses.

FR 2 836 031 discloses an applicator having at least two tips.

There is a need for other applicators for drawing different lines depending on the orientation given to the applicator, which applicators are relatively easy to use and to manufacture.

There is a need for other more flexible and more accurate applicators. There is a need to make it easier to apply makeup to the skin, the nails or the eyelids for example.

The invention thus aims to further improve applicators for applying cosmetic product to keratin materials and it achieves this by virtue of a cosmetic application member with longitudinal axis X having a bundle of synthetic polymer fibers, the fibers extending at least partially along the axis X, and the bundle having a central core defined by a first hardness, and an outer envelope arranged around the central core and formed by fibers at least partially bonded to each other by a resin, the outer envelope being defined by a second hardness, the ratio of the second hardness to the first hardness is between 1.2 and 100, the bundle continuing, in a direction away from its distal end, by delimiting an end face and the end face defines, in longitudinal section along the axis X, a bevel of angle β at the distal end of the application member.

The bevel favors the application and transfer of the product, in particular of makeup onto keratin materials. By virtue of the invention, an application member is available that offers a reserve of product, in the central core in particular, and an application zone, less heavily laden with product, formed by the end face.

The boundary between the distal end of the bundle and the end face may be barely perceptible or even imperceptible, or on the contrary be marked by a clearly visible height of at least partially separable fibers. By judiciously choosing the extent of this boundary, it is possible to favor the quality of the spreading of the cosmetic product on a surface or, on the contrary, to favor the accuracy.

Main definitions

A "cross section of a component of axis JF is a section perpendicular to the axis X of the component.

The expression "longitudinal axis of a component" denotes the line connecting all the barycenters of the cross sections of a component.

The "hardness" of the central core and of the outer envelope is measured according to the method indicated in EP 1 302 127, in particular with an ASKER Type JISK 6301 A durometer, for example described in the brochure "Asker Product Information, Asker Durometer type JA" 2016, Kobunshi Keiki Co. The "central core" is preferably formed by a cylinder of axis X extending over the entire height of the bundle, the diameter of the cylinder preferably being less than 3 mm and more preferentially still less than 2 mm. Advantageously, the central core comprises less than 10% by weight of resin relative to its total weight, and more advantageously still less than 5% by weight of resin relative to its total weight.

The "outer envelope" is preferably formed by a ring of axis X extending over the entire height of the bundle, the difference in radius between the large circle and the small circle preferably being between 1 mm and 4 mm, and more preferentially between 1.5 mm and 2.5 mm. Advantageously, the outer envelope comprises more than 20% by weight of resin relative to its total weight, and more advantageously still more than 30% by weight of resin relative to its total weight.

"The end face defines, in longitudinal section along the axis X, a bevel of angle β at the distal end of the application member ' " means:

if the end face is flat: the angle β of the bevel is the smallest angle between the end face and the axis X,

if the end face is entirely concave or entirely convex, the angle β of the bevel is the smallest angle between the axis X and the cutting plane defined by the ends of the fibers delineating the contour of the end surface, if the end face comprises a concave portion or a convex portion, the angle β of the bevel is the smallest angle between the axis X and the cutting plane defined by the free ends of the fibers delineating the contour of this concave or convex portion. This contour may comprise a portion of the contour of the end face. Preferred embodiments

Preferably, the device according to the invention has one or more of the following features, taken alone or in combination:

The angle β is between 5° and 85°, and preferably between 10° and 70°. The bevel is optimum for a makeup result.

- The ratio of the second hardness to the first hardness is between 1.3 and 7.0, and preferably between 1.9 and 7.0. The product application quality is optimized. The bundle divides, in a direction away from its distal end, into a portion of fibers which are at least partially separable and of which the free ends define the end face. Preferably, the height of the free fibers measured along the axis X is between 1 mm and 1 cm, and more preferentially between 3 mm and 6 mm. This height provides both accuracy and spreading of the product.

The application member has, on at least one portion of its height, a convex side profile, with the convexity directed toward the inside, when the application member is viewed from the front in a direction perpendicular to the axis X. This structure creates a clearance which makes application easier. - The end face is at least partially flat. This cut may make it possible to benefit, if that is desired, from a relatively extensive end face, which may facilitate the making up operation, by enabling an application that is both rapid and accurate.

The end face is at least partially concave, with the concavity directed toward the inside of the application member. A concave shape is suitable in particular for the shape of the lower part of the eyes, eyelids or nails.

The end face extends along the longitudinal axis X over a distance greater than or equal to 2 mm, the distance ranging in particular from 2 mm to 15 mm. This distance is suitable for applying a product gently without impairing its texture.

The end face is spaced apart, at at least one point, from the longitudinal axis X by a distance greater than or equal to 2 mm, the distance ranging in particular from 2 mm to 6 mm. Thus, the surface of the end face is better suited to the making up operation.

- The application member has, over at least one portion of its length measured along the longitudinal axis X, a circular cross section. It may be easier to use.

Cosmetic applicator

The invention also relates to a cosmetic applicator comprising a holder whereon application member as defined previously is mounted.

Preferably, it comprises a stem provided with at least one air uptake orifice. The holder of the application member can form the reservoir containing the cosmetic product. The applicator can then be in the form of a felt containing the cosmetic product, the application surface joining up with the cosmetic product by the base part inserted into the holder, such that the cosmetic product is conveyed to the end surface by capillary action.

In a variant, the reservoir is separate from the applicator. The holder can be a stem mounted for example on a cap of a container containing the product to be applied such that the application member can be inserted into the container in order to be impregnated with cosmetic product.

Device

According to another of its aspects, in combination with the above, the invention further relates to a packaging and application device comprising:

- a container containing a cosmetic product to be applied,

- an applicator as defined previously.

The container may be provided with a wiping member for removing the excess product present on the stem and on the application member.

Method for manufacturing an application member

According to another of its aspects, in combination with the above, the invention further relates to a method for manufacturing an application member as defined above, comprising the steps consisting in:

a. producing a blank of an application member with longitudinal axis X formed by a bundle of synthetic polymer fibers having a central core formed of fibers that are at least partially extended along the axis and an outer envelope arranged around the central core and formed by fibers at least partially bonded to each other by a resin, the hardness of the outer envelope being greater than the hardness of the central core,

b. grinding a portion of the blank, in particular perpendicularly to the axis X of the application member,

c. machining the distal end of the application member, optionally by grinding perpendicular or tangent to the fibers, d. optionally, cutting the fibers so as to form the end face.

A subsequent step may consist in bending the longitudinal axis of the application member, so as to make it curvilinear. Make-up method

The invention also relates to a cosmetic method for applying a product to a body surface, comprising the operations consisting in:

(i) providing an applicator as defined above,

(ii) optionally, picking up a cosmetic product in a container with the end face,

(iii) bringing the end face into contact with the body surface,

(iv) spreading the product on the body surface by moving the applicator over the body surface, optionally by modifying the inclination between the end face and the body surface or by turning the application member about its longitudinal axis X.

Detailed description

The invention may be better understood from reading the detailed description which will follow of nonlimiting exemplary implementations thereof, and from studying the attached schematic and partial drawing in which: - figure 1 shows, in longitudinal section along the axis X, the structure of the fibers of a first applicator according to the invention, with a flat end face,

- figure 2 shows, in longitudinal section along the axis X, the structure of the fibers of a second applicator according to the invention, with a convex end face,

- figure 3 shows, in longitudinal section along the axis X, the structure of the fibers of a third applicator according to the invention, with a convex and flat end face,

- figure 4 illustrates the definition of the versine,

- figure 5 shows a front view of a fourth example of an application member according to the invention,

- figure 6 shows a front view of a fifth example of an application member according to the invention, - figure 7 shows a front view of a sixth example of an application member according to the invention,

- figure 8 shows a front view of a seventh example of an application member according to the invention, - figure 9 shows a side view of the member from figure 8,

- figure 10 shows a front view of the member from figure 8, after rotation of 45° about the axis X,

- figure 11 shows an applicator according to the invention,

- figure 12 shows a device according to the invention, - figure 13 shows an example of an applicator according to the invention with four application members,

- figure 14 shows an example of an applicator according to the invention with three application members.

In the rest of the description, identical elements or elements having identical functions bear the same reference signs. Their description is not repeated for each of the figures, only the main differences between the embodiments being mentioned.

The application member 6 with longitudinal axis X represented in the figures is intended to apply a product P to an area of the body, for example to the face or the nails. It is for example a blusher, a nail varnish or a foundation. The application member 6 represented in figure 1 has a bundle 20 of fibers 41 comprising a central core 43 formed of fibers 41 extended along the axis X and an outer envelope 42 arranged around the central core 43 and formed by fibers 41 at least partially bonded to each other by a resin.

The bundle 20 is for example composed of from 10 to 1200, and preferably from 50 to 200, fibers 41 having a diameter ranging, for example, from 4/100th to 1 mm and preferably from 6/100th to 17/100th of a mm, which are generally made of polyamide, for example of Nylon® 6, 6-6, 6-10, 6-12 or of Nylon® 11, of polyester, of polymethacrylate, of polyacetal or of cellulose acetate. The fibers may have a linear density of less than 1 denier, preferably between 0.5 and 0.9 denier, in particular 0.7 denier (or around 9 micrometers).

The material forming the fibers 41 may contain an agent that modifies their surface finish and/or their slip characteristics and/or that reduces their wettability with water and/or a solvent, or else an antistatic agent.

By way of example, the resin may be a polyurethane resin, an epoxy resin, a silicone resin or an aliphatic resin.

The bundle 20 forms a porous structure so as to enable internal capillary action loading of the application member 6.

The bundle 20 has a cylindrical portion 60 of revolution about the longitudinal axis X and a portion 61 that defines, on viewing the application member 6 from the front in a direction perpendicular to the axis X, a convex side profile directed toward the inside and delimited by the lateral surface 31. But other shapes are possible without departing from the scope of the present invention, notably a cylindrical shape with a non-circular section, notably a rectangular or triangular section, for the portion 60.

The application member 6 may be obtained from a blank produced according to the process indicated in patent EP 1 302 127.

The end face 26 may be produced by cuts in a one-piece cylindrical part, notably with the aid of a cutting tool that is movable and orientable in all spatial directions. It may be obtained by shearing the blank either by cutting, or by grinding, optionally with a trimming operation.

The portion 61 may have various shapes in cross section, and have for example, over at least one portion of its height, an oblong, polygonal or flattened cross section, amongst others. The portion 61 may have a portion 23 of separable fibers 41 extending from the distal end 13 of the bundle and the free ends 54 of which define the end face 26.

The bundle 20 is advantageously a one-piece bundle. The end face 26 may be defined either directly at the end of the bundle 20, or by the end of the portion 23.

The application member 6 may dip, by the free ends 54 of the fibers 41, into a container 2 containing a cosmetic product and be impregnated, by capillary action, with the cosmetic product, in particular with nail varnish. The bundle 20 may have a base part 22 enabling the fastening thereof to a holder 15. The portion 23 of at least partially separable fibers 41 may define an application part allowing the application of the cosmetic product by coming into contact with the keratin materials. In figure 1, the end face 26 is flat and has a contour formed by the edge with the lateral surface of the application member 3. It itself defines the bevel of angle β in longitudinal section of the application member 6 along the axis X. The angle β is 60° in the example shown.

In figure 2, the end face 26 is concave, with the concavity directed toward the inside of the application member. The cutting plane P, passing through the free ends 541 of the fibers defining the contour of the application member 6, determines the angle β of the bevel. The contour of the application member is formed by the edge with the lateral surface of the application member. The angle β is equal to 60°. The end face extends over a height 1 of 1 cm. In figure 3, the end face 26 is divided into two surfaces: a concave surface 261, with the concavity directed toward the inside of the application member, and a flat surface 262. The surfaces 261 and 262 have different contours that are not symmetrical to one another.

The contour of each of the surfaces 261, 262 is formed by edges with the lateral surface of the application member 3 and by a curved base line that acts as a junction between the two surfaces 261 , 262. This curved base line is defined by the line from which the tangent to the end face 26 varies abruptly.

The bevel has an angle β equal to 45°.

The versine ε (figure 4) is defined as being the distance from the highest point S of the end face 26 or of a portion 261 of the end face to a straight line D joining two diametrically opposed regions of the contour of the end face 26.

Preferably, according to the invention, the versine ε is less than or equal to 1.2 mm, better still 0.5 mm. The same applies in the case of a slightly convex surface, with the convexity directed toward the inside, the versine ε being measured between the bottom of the cavity and the straight line D. In figure 5, the end face 26 is flat and defines, in longitudinal section, a bevel having an angle β close to 45°.

In figure 6, the end face 26 is concave, with the concavity directed toward the inside of the application member, with a versine ε close to 0.8 mm. The bevel has an angle β close to 30°.

In figure 7, the end face 26 is concave, with the concavity directed toward the inside of the application member, with a versine close to 1.1 mm. The bevel has an angle β close to 40°.

In figures 8 to 10, the end face 26 has an end portion 251 located in a cutting plane perpendicular to the axis X and an end portion 252 that defines, in longitudinal section, a bevel having an angle equal to 20°. The end portion 252 is concave, with the concavity directed toward the inside of the application member, with a versine close to 0.2 mm. The boundary between the end portion 251 and the end portion 252 is formed by an edge 253.

The end face 26 may be wider than the bundle 20, the end face 26 preferably having a maximum width ω' greater than at least 1.2 times the width ω of the base 22 of the bundle 20, the width being measured perpendicularly to the longitudinal axis X.

The end face 26 may be symmetrical relative to a midplanc M containing the largest diameter Do and passing through the longitudinal axis X. This structure facilitates a symmetrical application of the product on a body surface. The application member 6 according to the invention represented in figure 1 1 has an overall cylinder of revolution shape of axis X. The end face 26 is flat and defines a bevel having an angle β equal to 40°.

The application member 6 has a mounting part 84 enabling the fastening thereof to a holder 15 and an end face 26 for the application of the cosmetic product on coming into contact with the keratin materials.

The appl ication member 6 can be fastened to the holder 15 by any suitable means. For example, the application member 6, in particular the mounting part 84, can be force-fitted into a corresponding housing 85 provided at the end of the holder 1 5. The mount ing part 84 can be inserted at least partially into the housing 85. In figure 11, the application member 6 may be bought into contact with a cartridge of cosmetic product ( not shown) housed in the holder 15. The base part 22 of the bundle 20 may be supplied ith product from its proximal end and the product may diffuse longitudinally along the axis X, by capillary action, until it reaches the end face 26. In figure 12, the applicator 3 has a stem 5 having a longitudinal axis Y coincident with the longitudinal axis of the application member 6. The stem 5 is provided at a distal end with an applicator 3 according to the invention and is provided at the other end with a gripping member 11, which likewise forms a cap for closing the container 2 in a sealed manner. The latter has a body 130 which is provided at the top with a threaded neck 14 onto which a gripping member 11 can be screwed in order to close the container 2 in a sealed manner.

The stem 5 is hollow and may have an air uptake orifice 11 , in order to improve the distribution of the cosmetic product on the end face 26, by optionally making it possible to suck up an excess of product. The air uptake may take place along the path 50 represented by arrows, from the air pocket 133, in order to compensate for the volume of product picked up. The air can circulate owing to orifices 94, for example diametrically opposed orifices, made in the body of the stem 5.

A plurality of application members according to the invention may be mounted on one and the same holder 15 as represented in figures 13 or 14. Figure 13 represents an applicator 3 of axis Y holder 15 holding four application members 61, 62, 63 and 64 of respective axes A, B, C and D. They can be positioned on the holder with a variable or fixed spacing Ae, protruding from one and the same side of the holder 15. The application members 61, 62, 63 and 64 may be flexible to the point of being able to visibly bend during normal use of the applicator. The end faces 265, 266, 267, 268 of the adjacent application members may optionally be spaced apart. Preferably, fibers 41 of two adjacent application members are tangent, at their ends 54, to the same contact plane Ci, C 2 , C 3 parallel to the axis X.

Figure 14 represents an applicator 3 comprising three application members 61 , 62 and 63 separated from one another for different uses. For example, each end surface 125, 225 and 325 has a bevel having a different angle β used for a specific use, such as line drawing, shading or spreading. The application members 61, 62, 63 and 64 may have identical or different hardnesses, fiber densities, lengths, sections and diameters.

By means of the invention, the product is transferred pleasantly from the applicator to the body surface, with new sensations on application.

A translational movement of the applicator makes it possible to bring a surface to be made up into contact with a product-laden zone, in particular a convex portion of the application member.

The person can effect a slight rotational movement of the applicator, in particular before the translational movement, after the applicator has been bought into contact with the surface to be made up.

The invention is not limited to the illustrative embodiments that have just been described, the features of which may be combined with one another within variants that are not illustrated. In particular, the shape of the end face 26 may be different from those represented and the length of the portion 23 of separable fibers may be different from those represented.