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Title:
APPLICATOR FOR APPLYING A COSMETIC PRODUCT TO EYELASHES AND/OR EYEBROWS
Document Type and Number:
WIPO Patent Application WO/2020/127756
Kind Code:
A1
Abstract:
Applicator for applying a cosmetic product to the eyelashes and/or eyebrows. Applicator (2) for applying a cosmetic product (F) to the eyelashes and/or eyebrows, comprising a monoblock applicator member (8), the applicator member (8) comprising: - a core (10) that extends along a longitudinal axis (X), - a plurality of applicator elements (18; 18a) extending from the core, the applicator elements (18; 18a) each forming a loop and each comprising at least one surface relief (24).

Inventors:
SCHREIBER CAMILLE (FR)
THENIN AUDREY (FR)
OUNACEUR AMINE (FR)
Application Number:
EP2019/086336
Publication Date:
June 25, 2020
Filing Date:
December 19, 2019
Export Citation:
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Assignee:
OREAL (FR)
International Classes:
A46B1/00; A46B9/02; A46D1/00
Domestic Patent References:
WO2017098134A12017-06-15
WO2018210695A12018-11-22
WO2017098134A12017-06-15
WO2015106816A12015-07-23
WO2014126830A22014-08-21
WO2014126837A22014-08-21
Foreign References:
DE202011050794U12011-09-30
Attorney, Agent or Firm:
TANTY, François (FR)
Download PDF:
Claims:
Claims

1. Applicator (2) for applying a cosmetic product (F) to the eyelashes and/or eyebrows, comprising a monoblock applicator member (8), the applicator member (8) comprising:

a core (10) that extends along a longitudinal axis (X),

a plurality of applicator elements (18; 18a) extending from the core, the applicator elements (18; 18a) each forming a loop and each comprising at least one surface relief (24).

2. Applicator according to Claim 1, wherein the applicator member (8) is obtained by a method of additive manufacturing.

3. Applicator according to either of Claims 1 and 2, wherein the applicator elements (18; 18a) each have an axis of elongation (Y) extending in a longitudinal plane (M) of the core and/or a transverse plane (M') of the core (10).

4. Applicator according to any one of the claims, wherein the applicator elements (18; 18a) each comprise a central portion (22) and at least one branch connected at the base to the core, better still two separate branches (20a; 20b) connected at the base to the core, thus connecting the central portion (22) to the core (10).

5. Applicator according to Claim 4, wherein the central portion (22) of the applicator element (18; 18a) has the surface relief or reliefs (24).

6. Applicator according to any one of the preceding claims, wherein the applicator elements (18; 18a) form a flat loop in a plane of elongation, notably in a longitudinal plane (M) of the core.

7. Applicator according to any one of the preceding claims, wherein the applicator elements (18; 18a) have at least one plane of symmetry, notably a plane (M) longitudinal to the longitudinal axis of the core, better still two planes of symmetry, notably a plane (M') transverse to the longitudinal axis (X) of the core and a plane (M) longitudinal to the longitudinal axis of the core.

8. Applicator according to any one of the preceding claims, wherein the applicator elements (18; 18a) comprise at least one part, notably the central portion (22), which is flattened in a flattening plane.

9. Applicator according to any one of the preceding claims, wherein the surface relief or reliefs (24) are reliefs protruding from the surface of the applicator element (18; 18a), notably from the central portion (22) of the applicator element (18; 18a).

10. Applicator according to any one of the preceding claims, wherein the surface relief or reliefs (24) are outwardly convex, notably in the form of bosses.

11. Applicator according to the preceding claim, wherein each applicator element (18; 18a), notably each central portion (22), has at least two surface reliefs (24) in the form of outward bosses, which between them define a hollow zone (25).

12. Applicator according to any one of Claims 1 to 8, wherein the surface relief or reliefs (24) comprise, in a front view of the applicator element, an undulating form with a succession of arches of alternating concavity (22a-c).

13. Applicator according to any one of the preceding claims, wherein the distal part (25) of the applicator element (18; 18a) is wider than the base of the applicator element, in particular the branches (20a; 20b) diverge, from the base to the central portion (22) of the applicator element (18; 18a).

14. Applicator according to any one of Claims 1 to 12, wherein the distal part (25) of the applicator element has the same width as or is less wide than the base of the applicator element, in particular the branches (20a; 20b) are parallel or converge, from the base to the central portion (22) of the applicator element (18; 18a).

15. Applicator according to any one of the preceding claims, wherein the core (8) has at least one helical groove (16; 17) turning around the longitudinal axis (X) of the core (8), preferably at least two helical grooves (16; 17) of opposite hand and of the same pitch, turning around the longitudinal axis (X) of the core (8).

16. Applicator according to the preceding claim, wherein the applicator elements (18) are distributed over the core (8) in at least one row, better still at least two rows, wherein the row or rows of applicator elements preferably extend helically around the longitudinal axis (X) of the core, in particular following a helix (13; 15) with the same pitch as the helical groove or grooves (16; 17).

17. Applicator according to any one of the preceding claims, wherein the applicator member comprises applicator elements without surface reliefs, notably in the form of spikes, extending from the core.

18. Applicator according to Claim 17 or 18, wherein the or at least one row of applicator elements has only applicator elements in the form of loops comprising at least one surface relief, such a row preferably alternating with a row of applicator elements without surface reliefs on the core.

19. Device for packaging and applying a product to the eyelashes and/or the eyebrows, comprising an applicator (2) according to any one of the preceding claims and a container (3) containing the product (F).

20. Method for producing an applicator according to any one of Claims 1 to 18, wherein a blank of the applicator member or the applicator member itself is produced in successive layers from a digital model of the applicator or applicator member.

Description:
Description

Title: APPLICATOR FOR APPLYING A COSMETIC PRODUCT TO EYELASHES AND/OR EYEBROWS

Technical field

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

Prior art

It is known from application DE202011050794 to use a cosmetic product applicator comprising applicator elements in the form of loops without reliefs.

International application WO2017/098134 describes a method for the production, by additive manufacturing, of an applicator for applying a cosmetic product to the eyelashes and/or eyebrows, and the corresponding applicator. The applicator comprises an applicator member comprising a core and teeth extending from the core. Some of the teeth take the form of loops without reliefs and extend in a plane transverse to the longitudinal axis of the core.

There is a need to further improve applicators for applying a cosmetic 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.

Presentation of the invention

The invention aims to meet this objective, and its subject according to one of its aspects is an applicator for applying a cosmetic product to the eyelashes and/or eyebrows, comprising a monoblock applicator member, the applicator member comprising:

- a core that extends along a longitudinal axis,

- a plurality of applicator elements extending from the core, the applicator elements each forming a loop and each comprising at least one surface relief.

The expression “ applicator element’ denotes individualizable protruding elements intended to come into engagement with the eyelashes and/or eyebrows.

The application elements may be separated from each other. “ Surface relief means a protruding or recessed motif. The surface relief may be formed on the external or internal surface of the loop. When the relief is formed on the internal surface of the loop, it is oriented towards the cavity of the loop. The relief is preferably external.

“ Longitudinal axis of the core” denotes the line connecting all 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 the cross sections of the core. Preferably, the longitudinal axis of the core is rectilinear. As an alternative, this axis may have one or more curves.

“ Monoblock” is understood to mean that the applicator member is made as a single piece. The applicator member may be made of a single material. As an alternative, the applicator member may comprise several materials, notably parts made of different materials fused together where they join during their production such as to form just one single component. For example, the core comprises a centre made of a flexible material covered with a casing made of a more rigid material, the two materials being fused together at their joins.

The fact that the applicator elements comprise at least one relief allows better catching of the eyelashes, facilitating application of the cosmetic product and separation of the eyelashes. The relief may also, in particular when present on the external surface of the applicator element, constitute an additional zone for accumulation of product. These zones allow the eyelashes and/or eyebrows to be better loaded with cosmetic product.

Furthermore, the cavity formed by the loop of the applicator element constitutes a zone for accumulation of cosmetic product. This increases the autonomy of the applicator and allows the eyelashes and/or eyebrows to be properly loaded with product.

The applicator may comprise a stem to which the applicator member is fixed, 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, which may be rectilinear or curved.

Preferably, the applicator is symmetrical with respect to its longitudinal axis. The applicator may be without a plane of symmetry.

The applicator member is preferably obtained by an additive manufacturing method.

The fact that the applicator is obtained by additive manufacturing means that it can be obtained in a single step, the various elements constituting the applicator being 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 pre-established digital model by solidification of a raw material, slice by slice, from a second longitudinal end of the applicator member to the first longitudinal end of the applicator member.

Preferably, the applicator member is made at least partly of a material selected from semi crystalline thermoplastic materials, in particular a polyamide such as Nylon 12. These materials give parts of good mechanical and thermal strength.

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 means of an additive manufacturing method in which the material is solidified by irradiation with light, notably using a laser, by localized catalysis or by localized application of heat.

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

The applicator member may have an envelope surface of cross section that varies along all or part of the length of the applicator member. The cross section of the envelope surface may reduce on approach to at least one of the proximal and distal ends of the applicator member, preferably on approach to the distal end of the applicator member. This notably facilitates the application of cosmetic product to the eyelashes at the corner of the eye. Preferably, the envelope surface is defined by the distal ends of at least some of the applicator elements, in particular applicator elements in the form of loops comprising at least one surface relief.

The core may have a cross section of circular or polygonal shape, for example square, rectangular or triangular.“Cross section” is understood to mean any section produced in a plane orthogonal to the longitudinal axis of the core. The core may have a constant cross section from its proximal end to its distal end. As an alternative, the core has a cross section of variable shape and/or dimension along its longitudinal axis. For example, the cross section may reduce on approach to a distal and/or proximal end. Preferably, the section reduces on approach to the distal end of the applicator member.

The core may be solid or hollow.

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

The core may comprise at least one helical groove turning around the longitudinal axis of the core, preferably at least two helical grooves of opposite hand and of the same pitch, turning around the longitudinal axis of the core. Such grooves allow the formation of reserves of cosmetic product on the core.

Preferably, the helical groove or grooves extend around the longitudinal axis over at least one turn, preferably over a plurality of turns, notably between 2 and 60 turns, or, better, between 3 and 40 turns over the entire length of the applicator member.

According to another embodiment, the core is cylindrical.

The applicator elements may each have an axis of elongation defined by the line connecting the centres of mass of the cross sections of the applicator element. The axis of elongation may be oriented radially to the core.

The axis of elongation may define an axis of symmetry for the applicator element.

The axis of elongation may extend in a longitudinal plane of the core and/or a transverse plane of the core.

As an alternative, the axis of elongation extends at least partially in a plane that is inclined with respect to a plane perpendicular to the longitudinal axis of the core. In this case, the axes of elongation may all extend in the direction of one same end of the core.

As an alternative, the axis of elongation extends at least partially in a plane that is inclined with respect to a plane longitudinal to the core. This notably makes it possible to limit the amount of space without applicator elements when the applicator is seen from the side, i.e. looking perpendicularly to the longitudinal axis of the core.

Preferably, the axes of elongation all extend in the direction of one same end of the core. This makes it possible, during production by additive manufacturing, notably by Digital Light Processing (DLP), for all the portions of the body, which are solidified slice by slice, to be attached to the core by the applicator element. A portion that is not, at some point in the manufacture of the applicator by DLP, attached to the core could shift as a result of the production method being carried out in a liquid bath, and this would not allow manufacture in accordance with the digital model. The height of the applicator elements may vary along all or part of the length of the applicator member. This may reduce on approach to at least one of the proximal and distal ends of the applicator member, preferably on approach to the distal end of the applicator member.

As an alternative, the height of the applicator elements is constant along the longitudinal axis of the core.

The height of the applicator elements may be between 0.2 mm and 5 mm, preferably between 0.5 mm and 3 mm.

The applicator elements may have at least one plane of symmetry, notably a plane longitudinal to the longitudinal axis of the core, better still two planes of symmetry, notably a plane transverse to the longitudinal axis of the core and a plane longitudinal to the axis of the core.

The applicator elements may each comprise a central portion and at least one branch connected at the base to the core, better still two separate branches connected at the base to the core, thus connecting the central portion to the core.

The applicator elements may form a flat loop in a plane of elongation, notably in a plane longitudinal to the core.

The loop may be open or closed.

“ Open loop” means that the contour of the loop has an interruption 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 the base of one of the two branches. The two parts are facing one another and form between them a cavity having a quasi-closed contour.

The opening may be positioned elsewhere, for example at the join to the core such that the applicator element is joined to the core by a single base.

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 branches are substantially rectilinear and the central portion is not rectilinear, notably having one or more curves. Preferably, the central portion extends over the distal half of the corresponding applicator element, preferably over the distal third of the corresponding applicator element.

The applicator elements may comprise at least one part, notably the central portion, which is flattened in a flattening plane.

Preferably, the surface relief or reliefs are on the central portion of the applicator element. The fact that the surface relief or reliefs are on the central portion means that they extend over the distal half of the applicator element, rendering them more easily accessible to the eyelashes and/or the eyebrows.

The applicator elements, notably the central portion of the applicator elements, may each comprise at least one, better still a plurality of, surface reliefs. The number of surface reliefs per applicator element may be between 1 and 30, better still between 1 and 10, for example between 2 and 5.

The surface relief or reliefs may be protruding reliefs, notably protruding from the central portion of the applicator element.

Preferably, the surface relief or reliefs extend from a surface of the applicator element that is oriented towards the outside of the loop, notably a surface extending perpendicularly to the axis of elongation, the reliefs extending preferably parallel to the axis of elongation towards the outside of the loop.

The height of the surface relief or reliefs, measured along the axis of elongation, may be between 0.05 mm and 3 mm, better still between 0.25 mm and 1 mm.

The surface relief or reliefs may extend from the surface of the applicator element perpendicularly to said surface.

The surface relief or reliefs may have an outwardly convex shape.

The surface relief or reliefs which are outwardly convex may take the form of bosses. Each applicator element, notably each central portion, may comprise at least two surface reliefs in the form of outward bosses, which between them define a hollow zone. The hollow zone allows accumulation of the product at a distance offering easy access to the eyelashes. The hollow zone may have an outwardly concave shape or not. The hollow zone may be in the form of a groove, or a slot. The hollow zone may have a maximum depth of between 0.05 mm and 3 mm, even between 0.25 mm and 1 mm.

“ Maximum depth'’ means the distance, measured along the axis of elongation, between the highest point on the surface with reliefs and the lowest point thereon.

Preferably, at least two surface reliefs are identical.

Preferably, each surface relief is symmetrical with respect to the plane of elongation of the applicator element.

Preferably, the relief or reliefs notably in the form of bosses have a rounded shape, in particular when they extend towards the outside. The presence of rounded reliefs may also ensure gentler contact of the applicator member with the eyelids or eyelashes, in particular when they have rounded edges. That may encourage the user to bring the applicator member right up close to the eye, allowing the cosmetic product to be applied to the base of the eyelashes, or encourage her or him to press the applicator member more firmly against the eyelashes and/or eyebrows, making it possible to achieve a better loading of cosmetic product onto the eyelashes.

The relief or reliefs in the form of bosses may have an outer edge of semi-circular shape, in a front view of the applicator element, with a radius of curvature of between 0.05 mm and 1.5 mm. The relief or reliefs in the form of bosses may have a surface in the shape of a spherical cap or a quadric with symmetry of revolution, in particular an ellipsoid.

“ Front view” means a view along an axis perpendicular to the plane of elongation of the applicator element.

As an alternative, the relief or reliefs in the form of bosses have at least one chamfered edge. The relief or reliefs in the form of bosses may, in a front view of the applicator element, take the form of a trapezium, a rectangle or triangle.

The surface relief or reliefs may comprise a portion of their surface which is conical or cylindrical with symmetry of revolution.

As an alternative, the surface relief or reliefs may, in a front view of the applicator element, have an undulating form with a succession of arches of alternating concavity. Thus, the outwardly concave arch or arches allow accumulation of product and the outwardly convex arch or arches allow gentle application of the product.

In a front view of the applicator element, the arch or arches may each have a radius of curvature of between 0.05 mm and 2 mm. In a front view of the applicator element, the arch or arches may be in the form of a portion of a circle, in particular a semi-circle.

Each applicator element, notably each central portion, may comprise, in a front view of the applicator element, at least two arches of alternating concavity. Preferably, at least two arches have an identical radius of curvature.

The arch or arches may extend along a portion of the applicator element extending substantially perpendicularly to the axis of elongation thereof, notably on the central portion.

The applicator elements may comprise a distal part that is wider than the base of the applicator element, in particular the branches may diverge, from the base to the central portion of the applicator element.

The“distal part” corresponds to the part that extends from 1/4 of the length of the applicator element, from the base via which the applicator element connects to the core, as far as its distal end. The distal part may be more limited and correspond to the part that extends from half, or, better, 2/3 of the length, or even from 3/4 or 4/5 of the length of the applicator element; in particular, the distal end may correspond to the central portion.

As an alternative, the distal part of the applicator element has the same width as or is less wide than the base of the applicator element, in particular the branches may be parallel or converge, from the base to the central portion of the applicator element.

The branches each extend along an axis of extension. The axes of extension of the branches may each make an angle with the axis of elongation of the corresponding applicator element. Said angle may be between 5° and 80°, better still between 10° and 60°, even better still between 10 and 45°.

The branches may each have a circular or polygonal cross section. Preferably, the section is circular. The section may be constant along the axis of extension. As an alternative, the section may be non-constant, in particular reducing in the direction of the central portion. Preferably, the applicator element has a section that is variable along the loop. The section may have one or more maxima, especially in the central portion.

As an alternative, the section is constant along the loop.

The height of the applicator elements, measured from the core along the axis of elongation, may be between 0.2 mm and 5 mm, preferably between 0.5 mm and 3 mm. In one embodiment, all of the applicator elements are in the form of a loop and each comprise at least one surface relief.

As an alternative, the applicator member comprises additional applicator elements without surface reliefs and/or taking a form other than a loop, in particular the form of a spike, extending from the core.

The additional applicator elements may each have an axis of elongation extending in a plane transverse to the longitudinal axis of the core. This axis of elongation may be oriented radially, i.e. along a radial axis of the core.

As an alternative, the additional applicator elements are 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 in a front view of the applicator, i.e. looking along the longitudinal axis of the core.

As an alternative, the axis of elongation extends at least partially in a plane that is inclined with respect to a plane transverse to the longitudinal axis of the core.

The additional applicator elements may have a circular or polygonal cross section.

Preferably, the additional applicator elements are spikes. Preferably, they have a cross section that reduces on approach to the free end thereof. This allows good separation of the eyelashes.

The additional applicator elements may extend along an axis of elongation that is rectilinear or non-rectilinear. For example, their distal portion is curved.

As an alternative, the additional applicator elements have any other form, notably the form of a V. The distal end of the additional applicator elements may likewise be enlarged, preferably flattened in a longitudinal flattening plane of the core. For example, the enlarged end has the form of a disk, a half-disk, an X or a V.

The height of the additional applicator elements may vary along all or part of the length of the applicator member. It may decrease towards one of the distal and proximal ends of the core. Preferably, the height of the additional elements reduces towards the distal end of the core.

In an alternative, the height of the additional applicator elements is constant along the longitudinal axis of the core. The applicator elements may be distributed over the core in at least one row of applicator elements, preferably at least two rows of applicator elements.

Preferably, the row or rows of applicator elements extend helically around the longitudinal axis of the core, in particular following a helix with the same pitch as the helical groove or grooves, and preferably at the same distance from the two helical grooves when two grooves are present.

The helical row or rows of applicator elements may extend around the longitudinal axis over at least one turn, preferably a plurality of turns, preferably between 2 and 60 turns, preferably 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 aspect 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.

Preferably, the row or rows of applicator elements each extend between the turns of the groove or grooves of the core, in particular at an equal distance from the latter.

As an alternative, the row or rows of applicator elements each extend along the groove or grooves of the core.

As a further alternative, at least one row of applicator elements extends between the turns of the groove or grooves, and at least one row of applicator elements extends along the groove or one of the grooves.

Preferably, the applicator elements are distributed in at least two helical rows around the longitudinal axis of the core and are intercalated with one another.

The or at least one row of applicator elements may comprise only applicator elements in the form of loops comprising at least one surface relief. Preferably, such rows of applicator elements in the form of loops alternate with rows of additional applicator elements on the core. This allows both good separation of the eyelashes and/or eyebrows, notably by the additional applicator elements, and good loading of the eyelashes and eyebrows with cosmetic product, notably by the applicator elements in the form of loops comprising one or more surface reliefs.

The or at least one row of applicator elements may comprise applicator elements in the form of loops comprising at least one surface relief alternating with additional applicator elements. Preferably, the 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.

In another embodiment, the applicator elements extend along at least two rows parallel to the longitudinal axis of the core, better still four rows, preferably between five and twelve rows, for example nine rows. Each row may comprise a number of applicator elements between 2 and 20 elements, preferably between 5 and 15, for example 7.

At least some of the distal ends of the applicator elements may define an envelope surface of the applicator member. Preferably, the envelope surface is defined by the distal end of the applicator elements in the form of loops comprising at least one surface relief.

The envelope surface may have a rectilinear longitudinal axis coincident with the longitudinal axis of the core.

The envelope surface may be symmetrical in revolution about the longitudinal axis of the core and have a circular cross section.

The cross section of the envelope surface may reduce on approach to at least one of the proximal and distal ends of the applicator member, preferably on approach to the distal end of the applicator member.

A further subject of the invention is a method for the production of 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 from a digital model of the applicator or of the applicator member.

Such a method allows an applicator to be produced in a single step, the various elements of the applicator being 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 which in particular are impossible to produce by injection moulding in monoblock fashion because of the presence of undercuts.

The method may comprise:

(i) production of a digital model of the applicator,

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

The raw material is preferably a powdery material. In this case, step (ii) can be performed by sintering the powdery raw material layer by layer. As an alternative, the raw material is liquid, and in particular is a photo-crosslinkable material. In step (ii), the raw material may be solidified slice by slice, by irradiation of the photo-crosslinkable raw material.

The method of production by additive manufacturing may be a process 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 method 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 successive layers, solid parts adhering to one another so as to form the applicator member.

Preferably, the powdery material is a semi-crystalline thermoplastic material in powder form, in particular a polyamide such as Nylon 12 or PA2200. As an alternative, the powdery material is a metallic material, a composite, ceramic, glass or resin.

The coalescence agent or agents may be a composition of an ink type comprising carbon black, such as for example the ink composition CM997A available notably from the Hewlett-Packard Company. The coalescence agent or agents may additionally comprise an absorber of infrared and/or near infrared and/or visible light, in particular the ink compositions 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, notably may be a saline solution. The coalescence modifying agent or agents may be the ink composition CM996A or CN673A available notably 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 of production by additive manufacturing comprises:

a) localized irradiation by a light source, in particular a laser, in a predefined build zone, of a fluid photo-crosslinkable material contained in a vat so as to form 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 free 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) in order to produce continuously, in successive layers, solid parts which adhere together so as to form the applicator member.

The vat comprises, preferably, a surface in fluidic 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 which is 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 movement of the support are continuous, wherein the fluid zone and the build zone at their interface have a polymerization gradient such that production of the applicator member is substantially continuous. This makes it possible to limit the presence of visible strata as found in methods of production by additive manufacturing that produce the object layer by layer. The method preferably comprises an additional step of heating the applicator member formed. This makes it possible to harden the structure of the applicator member produced and to smooth out its surface.

The method for producing the applicator may be as described in international applications WO2014126830 and WO2014126837.

The invention also concerns a makeup method for 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] figure 1 shows an application and packaging device according to the invention,

[Fig 2] figure 2 is a schematic perspective representation, in profile, of an applicator member of an applicator according to the invention,

[Fig 3] figure 3 is a front view, i.e. a view on III, of the applicator member of Figure 2,

[Fig 4] figure 4 is a view of a detail of the applicator member of Figures 1 to 2, [Fig 5] figure 5 shows an applicator element of the applicator member of Figures 1 to 4,

[Fig 6] figure 6 shows an applicator element of the applicator member of Figures 1 to 4,

[Fig 7] figure 7 is a view in cross section of the applicator member of Figures 1 to 4,

[Fig 8] figure 8 is a schematic perspective representation, in profile, of an alternative applicator member of an applicator according to the invention,

[Fig 9] figure 9 shows an envelope surface of the applicator member of Figure

8,

[Fig 10] figure 10 is a longitudinal section through the applicator member of Figures 8 and 9, [Fig 11] figure 11 shows an applicator element of the applicator member of Figures 8 to 10,

[Fig 12] figure 12 shows an applicator element of the applicator member of Figures 8 to 10,

[Fig 13] figure 13 shows an alternative form of applicator elements of an applicator according to the invention,

[Fig 14] figure 14 shows an alternative form of applicator elements of an applicator according to the invention,

[Fig 15] figure 15 shows an alternative form of applicator elements of an applicator according to the invention,

[Fig 16] figure 16 shows an alternative form of applicator elements of an applicator according to the invention,

[Fig 17] figure 17 shows an alternative form of applicator elements of an applicator according to the invention,

[Fig 18] figure 18 shows an alternative form of applicator elements of an applicator according to the invention,

[Fig 19] figure 19 shows an alternative form of applicator elements of an applicator according to the invention,

[Fig 20] figure 20 shows an alternative form of applicator elements of an applicator according to the invention,

[Fig 21] figure 21 shows an alternative form of applicator elements of an applicator according to the invention,

[Fig 22] figure 22 shows an alternative form of applicator elements of an applicator according to the invention,

[Fig 23] figure 23 shows an alternative form of applicator elements of an applicator according to the invention,

[Fig 24] figure 24 shows an alternative form of applicator elements of an applicator according to the invention,

[Fig 25] figure 25 shows an alternative form of applicator elements of an applicator according to the invention,

[Fig 26] figure 26 shows an alternative form of applicator elements of an applicator according to the invention, [Fig 27] figure 27 shows an alternative form of applicator elements of an applicator according to the invention,

[Fig 28] figure 28 shows an alternative form of applicator elements of an applicator according to the invention,

[Fig 29A] figure 29A shows a step in the production of the applicator member according to the invention,

[Fig 29B] figure 29B shows a step in the production of the applicator member according to the invention,

[Fig 29C] figure 29C shows a step in the production of the applicator member according to the invention,

[Fig 29D] figure 29D shows a step in the production of the applicator member according to the invention,

[Fig 29E] figure 29E shows a step in the production of the applicator member according to the invention,

[Fig 29F] figure 29F shows a step in the production of the applicator member according to the invention,

[Fig 30] figure 30 shows steps in the production of the applicator member according to the invention,

[Fig 31] figure 31 shows steps in an alternative production method for producing the applicator member according to the invention, and

[Fig 32] figure 32 shows steps in an alternative production method for producing the applicator member according to the invention.

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 cosmetic product F to be applied to the eyelashes and/or the eyebrows, for example mascara or a care product.

The container 3, in the example concerned, comprises a threaded neck 4, and the applicator 2 comprises a gripping member 5 which also forms a closure cap for the container 2. This is arranged to be fixed to the neck 4 such as to close the container 3 in a sealed fashion when not in use.

The container 3 may also be produced differently. The applicator 2 has a stem 7 of longitudinal axis X t , which is attached at its upper end to the closure cap 5 and at its lower end to an applicator member 8 according to the invention. The latter has a core 10 bearing applicator elements 18 that extend from the core 10 and all around the latter.

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

This wiping member 6, which may be any wiping member, comprises, in the example in question, a lip arranged such as 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.

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 were to have a different section, it then being possible to fix the cap 5 on the container 3 in some other way than by screwing. The wiping member 6 is adapted to the shape of the stem 7 and to that of the applicator member 8.

Preferably, and as in the example in question, the longitudinal axis X t 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, notably completely, flexible, in particular in the vicinity of the applicator member. The applicator member 8 is fixed to the stem 7 by any means, and notably 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 fixing it in a corresponding housing of the stem 7.

One example of an applicator member according to the invention is described in relation to Figures 2 to 9 below. The applicator member 8 has a core 10 and a plurality of applicator elements 18 extending from the core 10.

One example of an applicator member according to the invention will now be described with reference to Figures 2 to 6.

The applicator member 8 has 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 may have another shape, for example curved. The longitudinal axis X is central, but this does not have to be the case.

The length H of the core 10 may for example be between 15 mm and 27 mm.

As shown in particular in Figures 2 and 4, the core 10 comprises two grooves 16 and 17 each turning around the longitudinal axis of the core X following two respective helices 13 and 15. The two helices 13 and 15 are of opposite hand to one another relative to the longitudinal axis X, and have the same pitch. The helices 13 and 15 extend around the axis X over more than one turn, in particular over more than 6 turns, for example over 9 turns. The applicator member 8 may comprise two rows of applicator elements 18. The rows of applicator elements 18 extend 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, as an 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 the helical grooves 16 and 17.

Each row has, for example, between 2 and 500 applicator elements, better still between 5 and 300 applicator elements.

The distance D e between two consecutive applicator elements of the same row may be between 0.05 mm and 2 mm, preferably between 0.2 mm and 1.4 mm. The applicator member comprises two types of applicator elements:

- applicator elements 18a in the form of loops, each comprising several surface reliefs 24, and

- applicator elements 18b in the form of spikes.

The applicator elements 18b in the form of spikes extend along a row alternating with a row of applicator elements 18a.

The applicator elements 18b have, for example, a circular section and taper towards their distal end. As shown in Figures 4 and 6, they may each extend along an axis of elongation Y b coincident with a radial axis.

In an alternative that is not shown, the applicator elements 18b are inclined towards one end of the applicator member 8 relative to a radial axis at their base, by an angle of between 5° and 25°, for example substantially equal to 15°.

The applicator elements 18a extend from the core via two rectilinear branches 20a and 20b connected to the core 10 at their base and connected to one another at their distal ends by a central portion 22. In the example shown, the central portion 22 has a rounded internal edge 22a, in particular in the form of an arch, and an external surface 22b with protruding reliefs 24. The latter have an identical shape, taking the form of outwardly convex bosses, numbering three in this case. The reliefs 24 have a rounded shape and each has a cross section in the shape of a half-disc, in a front view of the applicator element. The rounded aspect of the bosses makes the applicator somewhat gentle. In a front view of the applicator element, the reliefs 24 each have a radius of curvature r ci of between 0.05 mm and 1.5 mm. The bosses make between them hollows forming reserves of product that are easily accessible to the eyelashes. The hollows are in the form of grooves with a depth d of between 0.05 mm and 3 mm.

The depth d corresponds to the distance between the highest point Ml on the central portion and the lowest point M2 thereon in projection along the axis of elongation of the element.

As shown in Figure 5, the distal ends of the bosses 24a-c are all at the same height relative to the axis of elongation. This height corresponds to the height L, measured from the core, of the projection of the vertex of each boss on the axis of elongation. This distance corresponds substantially to the height of the applicator element 18a. As shown in Figure 4, the applicator elements 18a each extend along an axis of elongation Y. The axes of elongation Y extend radially.

The branches 20a and 20b diverge towards the central portion 22. They extend along axes of extension P a and P b , respectively.

The axes of extension P a and P b each make an angle Pa and pb with the axis of elongation Y of the applicator element 18a. The angles p a and P b may each be between 10° and 80°. They may be substantially equal. In the example shown, the angles p a and P b are substantially equal to 10°. The branches 20a and 20b are spaced apart at their base by a non-zero distance.

The applicator element 18a has a distal part 25 that is wider than the base of the applicator element. The distal part 25 has a maximum length d in the central portion 22 that is greater than the maximum amount of space D taken up on the core by the bases of the two branches 20a and 20b.

The applicator elements 18a are symmetrical with respect to the axis of elongation Y, a longitudinal plane of the core M and a transverse plane of the core M'.

The applicator elements 18a each form a loop extending in a plane, notably a longitudinal plane of the core M.

The branches of the applicator elements 18a have a substantially rectangular section over their entire extent. However, this may not be the case. For example, they may have a circular or oval section over at least part of their extent.

The applicator elements 18a each have a section of variable dimension along the loop. In the example shown, the section has one or more maxima in the central portion. As an alternative, the section is constant along the loop.

The height L of the applicator elements 18a and 18b, measured from the core along the axis of elongation, may be between 0.2 mm and 5 mm, even between 0.5 mm and 3 mm. The applicator elements 18b of one row each have a height lower than the height of the applicator elements 18a of the neighbouring row.

The applicator elements 18a extend in a closed loop so as to form a cavity 26. Such a cavity allows a reserve of product to be formed.

The cavity 26 has a maximum width w greater than or equal to 0.1 mm, preferably between 0.2 mm and 4 mm, better still between 0.5 mm and 1.5 mm. The ratio w/d is for example between 10% and 90%, preferably between 25% and 80%. The cavity 26 has a height L c measured along the axis of elongation of between

0.1 mm and 4.9 mm.

The ratio L c /L is for example between 10% and 90%, preferably between 25% and 80%. The loop make take forms other than the arch shown in Figures 4 and 5.

In the embodiment shown in Figures 7 to 9, the applicator member 8 comprises applicator elements 18 each extending from the core via two rectilinear branches 20a and 20b connected to the core 10 at their base and connected to one another at their distal ends by a central portion 22.

The applicator elements 18 each extend along an axis of elongation Y. The axis Y extends perpendicularly to the longitudinal axis X of the core.

The applicator elements 18 are symmetrical with respect to their axis of elongation Y.

The applicator elements 18 extend perpendicularly to the core.

The applicator elements 18 extend from the core in several parallel rows. In the example shown, the number of rows is substantially equal to 9. In the case of N rows, these rows are distributed over the core with a spacing between two neighbouring rows equal to 360°/N. Each row has, for example, between 2 and 15 applicator elements, better still between 5 and 10 applicator elements. In the example shown, each row has 8 applicator elements.

In the example in question, as can be seen notably in Figure 8, at least part of the distal 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 said axis X, is elongate and has a circular section. The envelope surface S has, in the example shown, a cross section the dimension of which varies over the entire length of the applicator member 8. The cross section of the surface reduces on approach to the distal end of the applicator member.

The branches 20a and 20b each extend along an axis of extension Pa and Pb, respectively. The axes of extension Pa and Pb make an angle g of between 0° and 80° with the axis of elongation Y. In the example shown, the angle g is substantially equal to 5°.

The central portion 22 has, in front view of the applicator element, surface reliefs in the form of an undulation 24. The undulation consists of a series of arches, three in the example in question, namely two outwardly convex arches 24a and 24c and an outwardly concave central arch 24b connecting the two convex arches 24a and 24c. In a front view of the applicator element, the arches 24a-c have a radius of curvature r C 2 of between 0.05 mm and 2 mm. The central arch 24b defines an outwardly concave cavity 25 which is open in a direction T coincident with the axis of elongation Y of the applicator element 18. The cavity 25 has a depth d of between 0.05 mm and 3 mm, even between 0.25 mm and 1 mm. In the example shown, the depth d corresponds to twice the radius of curvature r C 2.

The applicator elements 18 each comprise a central portion 22 which is flattened in a flattening plane. The flattening plane is the plane of elongation of the applicator element. The central portion 22 extends between two planes longitudinal to the core, Mi and M2, parallel to one another and spaced apart by a distance less than or equal to the greatest thickness of the bases D2 of the applicator element.

The applicator elements 18 extend in a closed loop so as to form a cavity 26. Such a cavity allows a reserve of product to be formed.

The cavity 26 has a maximum width w of between 0.1 mm and 7.8 mm.

The ratio w/d is for example between 10% and 90%, preferably between 25% and 80%.

The cavity 26 has a height L c measured along the axis of elongation of between

0.1 mm and 4.9 mm.

The ratio L c /L is for example between 10% and 90%, preferably between 25% and 80%. Figures 13 to 28 show shapes of applicator elements 18 which differ from that of the embodiments of Figures 1 to 12.

The applicator elements may comprise one or more protuberances 30 extending over a portion of the applicator element 18, notably over the external surface of the branches 20a and 20b, as shown in Figures 13 and 14. In these examples, the protuberances 30 extend in a plane transverse to the longitudinal axis of the core 10, but this does not have to be the case.

The branches 20a and 20b of the applicator elements may converge towards the central portion 22. In this case, the central portion 22 has a length L which is less than the distance D between the branches 20a and 20b, as shown in Figures 16 and 17.

The applicator element 18, in particular the central part, may comprise one or more reliefs in the form of outwardly concave bosses 24a-c, as shown in Figure 15. Such reliefs form outwardly open cavities 25a-c, thus forming reserves that are easily accessible to the eyelashes. In the example shown in Figure 18, each applicator element 18 has a serrated shape. The applicator element is formed by a succession of outwardly concave pointed arches 21a-c, teeth being formed at the junction between two arches. In the example shown, the applicator element 18 describes, starting from the core 10, a first pointed arch 21a which is joined to a second arch 21b, forming a first tooth 23a, this second arch 21b itself being joined to a third arch 21c forming a tooth 23b.

The applicator member 18 has a shape that is symmetrical with respect to its axis of elongation Y.

At their junction, the two arches 21c form a tooth 23c which defines the vertex of the applicator element in a loop 20 and is situated on the axis of elongation Y.

In the examples shown above, the applicator element 18 extends as a closed loop. As an alternative, the loop is open, as will be described with reference to Figures 19 to 27.

The applicator element 18 may have in the loop an opening 50 located at a non-zero distance from the core, notably in the central portion as shown in Figures 19 and 20 and 28. In these examples, the opening 50 is located at the centre of the central portion. The applicator member 18 is thus composed of two portions that are symmetrical with respect to its axis of elongation. The opening 50 may have a width e 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.

The opening 50 may be located at the join between the applicator element and the core, as shown in Figures 21 to 27.

In the example of Figure 21, reliefs 24 are present on the external surface of the central portion 22 of the applicator element 18. In this example, the reliefs 24 comprise a plurality of identical periodic motifs 24a-d which protrude from the external surface of the central portion 22. Each of the motifs 24a-d has a rectangular shape. These reliefs between them form outwardly open cavities 25a-c which are rectangular in shape. As an alternative, these reliefs 24a-f are present over the entire external surface of the applicator element 18, as shown in Figure 22.

Figure 27 shows an exemplary embodiment in which annular grooves 32 are formed in the applicator element 18. Such grooves may allow a reserve of product to be formed. In the example shown, the applicator element has a section the dimension of which reduces on approach to the free end of the applicator element 18. Figure 25 shows another embodiment in which the applicator element 18 is defined by a succession of broken lines 33, giving it a zigzag shape, teeth being formed at the junction between two broken lines. This zigzag shape defines several outwardly open cavities 25, allowing an accumulation of product at an easily accessible distance. Moreover, the teeth allow good separation of the eyelashes.

Figure 26 shows an example of an applicator element of non-constant section. In this example, the applicator element 18 has a wide base 31 and a wide free end 33, for example of frustoconical shape. The applicator element has, starting from the core, a first trapezium 35 connected to a second trapezium at its upper base 35b. The second trapezium is connected, at its upper base 37b, to a portion 39 in the form of an arc of a circle, with a section that reduces all along said portion. Lastly, the portion 39 is connected to a trapezium 41 defining the free end 33.

Figures 23 and 24 show examples of an applicator element 18 as an open loop in which the central part 22 has sinusoidal undulations. In the example shown in Figure 23, the applicator element has a shape that tapers along the loop towards the free end of the applicator element 18.

The applicator member 8 may be produced using 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 applicator member 8 in three dimensions, and may be generated using computer-assisted design software such as SolidWorks 3D.

As shown in Figures 29A-F and 30, 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 29A, by moving the material dispenser 53 along the axis Y'. One or more coalescence agents 65 and/or coalescence modifiers 67 are then deposited on parts of the layer 63, as shown in Figure 29a, by moving the associated dispensers along the axis Y'. The parts of the layer 63 on which the agents 65 and modifiers 67 are deposited are determined as a function of the digital model previously formed. Once the coalescence agents 65 and coalescence modifiers 67 have been deposited, the latter at least partially penetrate the layer 63 as shown in Figure 29B. Finally, energy is applied to the entire 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; once the layer has cooled, these fused parts may then solidify as shown in Figure 29C. The modifiers 67 make it possible to obtain sharp edges of the fused zones by preventing fusion of peripheral zones. After the material layer 63 has been treated as described above, a new layer 73 of powdery material is deposited on the layer 63 previously treated, as shown in Figure 29D. The process explained above may then be repeated to generate the three- dimensional applicator member layer by layer, as shown in Figures 29D-F.

During production, the substrate 51 moves along the axis Z' such 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 using this device from its proximal end 13, i.e. that intended to be connected 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 31 and 32. In the example concerned, 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 crosslinked parts of the liquid material 44 are solid. Before production, as shown in Figure 31, 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 32, 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 preceding layer.

The vat 42 may have a surface 48 between the substrate 46 and the light source 40 which is in fluidic communication with a source of polymerization inhibitor, in particular a source of oxygen. The polymerization inhibitor allows the liquid material 44 to be maintained in liquid form, by preventing its polymerization by the light irradiation, in a fluid zone of thickness not equal to zero. This fluid zone extends from the surface 48 to the build zone and allows the liquid to flow towards 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 sharp, but may be formed with a gradient of polymerization. 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, notably 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 has a hollow core and at least one opening for supplying the applicator with cosmetic product.