WO2020127826A1

WO2020127826A1 - Applicator comprising an applicator member produced by additive manufacturing

Info

Publication number: WO2020127826A1
Application number: PCT/EP2019/086446
Authority: WO
Inventors: Amine OUNACEUR; Camille Schreiber; Audrey THENIN
Original assignee: L'oreal
Priority date: 2018-12-19
Filing date: 2019-12-19
Publication date: 2020-06-25
Also published as: FR3090299A1; FR3090299B1

Abstract

The invention relates to an applicator (2) for applying a cosmetic product, comprising an applicator member (8) obtained by additive manufacturing, comprising: - a core (10) extending along an axis (X), - applicator elements (18) extending from the core (10), applicator elements (18a) each comprising o an elongate body (20), o a protuberance (22) extending laterally from the body (20), at least partially in the direction of a first longitudinal end (11, 13) of the applicator member, all of the protuberances being such that, for every cross section of the protuberance, moving in the direction from the base (23) of the protuberance toward its end (24), each point on the outer surface of the protuberance in this section is connected to a point on the outer surface of the protuberance in every other section, considered in the direction from the section toward the end of the protuberance, by a vector oriented perpendicular to the axis (X) and/or toward the first end.

Description

APPLICATOR COMPRISING AN APPLICATOR MEMBER PRODUCED BY ADDITIVE MANUFACTURING

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

Technical field

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

International applications WO 2013/003442 and WO 2015/110853 describe applicators for applying a cosmetic product to the eyelashes and/or eyebrows, having applicator elements with a body in the form of a spike and at least one protuberance.

International application WO 2017/098134 describes an applicator for applying a cosmetic product to the eyelashes and/or eyebrows, having protuberances in the form of a loop, extending on the surface of the core, and rectilinear protuberances. The latter may have secondary protuberances extending from them, transversely with respect to the longitudinal axis of the core.

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

Summary of the invention

The invention aims to meet this objective, and its subject according to one of its aspects is an applicator for applying a cosmetic product, comprising an applicator member obtained by additive manufacturing, the applicator member comprising:

- a core extending along a longitudinal axis, and

- a plurality of applicator elements extending from the core, the applicator elements each comprising:

o a body of elongate shape, and o at least one protuberance extending laterally from the body, at least partially in the direction of a first longitudinal end of the applicator member,

all of the protuberances being such that, for every cross section of the protuberance, each point located on the outer surface of the protuberance in this section is connected to at least one point on the outer surface of the protuberance in every other cross section, considered in the direction from the section toward the distal end of the protuberance (“subsequent” cross section), by a vector oriented perpendicular to the longitudinal axis of the core and/or oriented toward the first longitudinal end of the applicator member.

“ Applicator elements” denotes individualizable projecting elements designed to come into engagement with the eyelashes and/or eyebrows.

“A vector oriented perpendicular to the longitudinal axis of the core and/or oriented toward the first longitudinal end of the applicator member” means that the vector is defined by a component oriented perpendicular to the longitudinal axis of the core and/or a component oriented toward the first longitudinal end of the applicator member.

“ Cross sections of the protuberance” means the sections perpendicular to the axis of extension of the protuberance.

Ίh the direction of the first longitudinal end of the applicator member” means that

- for all of the cross sections of the protuberance, moving in the direction from the base of the protuberance toward its distal end, each point on the outer surface of the protuberance is connected to at least one point on the outer surface of the protuberance of each subsequent cross section by a vector oriented perpendicular to the longitudinal axis of the core and/or oriented toward the distal end of the applicator member or

- for all of the cross sections of the protuberance, moving in the direction from the base of the protuberance toward its distal end, each point on the outer surface of the protuberance is connected to at least one point on the outer surface of the protuberance of each subsequent cross section by a vector oriented perpendicular to the longitudinal axis of the core and/or oriented toward the proximal end of the applicator member.

Thus, none of the applicator elements comprise protuberances extending toward the second end of the applicator member and none of the protuberances comprise a portion extending toward the second end of the applicator member with respect to the base of said portion.

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

This also makes it possible to develop new forms of applicator, particularly ones which are impossible to produce by injection molding because of the presence of undercuts.

The presence of protuberances on at least some applicator elements facilitates loading of the applicator with cosmetic product, by increasing the surface area of the applicator and by creating reserves of product, in particular where the protuberances join the corresponding applicator element. This improves loading of the eyelashes with product as the latter is applied. This also makes it possible“lift” the level where the composition collects on the applicator part, by affording surfaces suitable for the collection thereof at a certain radial distance from the central part.

Moreover, the fact that the protuberances are as described above limits the extension of the protuberances laterally or toward a single side of the brush, making it possible to leave, if desired, free spaces between the applicator elements to facilitate penetration of the eyelashes between the latter. Loading of the eyelashes with product as the latter is applied is thereby improved, while allowing good handling and separation of the eyelashes and smoothing of the product on their surface.

Preferably, the applicator member is monobloc.“ Monobloc” means 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 a plurality of materials, notably parts made from different materials fused together at their join during production thereof such as to form only a single component. For example, the core comprises a center of a flexible material covered with a casing of a more rigid material, the two materials being fused together at their joins.

The applicator may comprise a stem to which the applicator member is secured, notably comprising a housing in which an end piece of the applicator member is held. Preferably, the end piece extends along the longitudinal axis of the core, 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 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, notably from its distal end to its proximal end or, preferably, from its proximal end to its distal end. When the first longitudinal end of the applicator member is the distal end, 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 its proximal end to its distal end, and when the first longitudinal end of the applicator member is the proximal end, 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 its distal end to its proximal end.

The fact that the protuberances are as described above means that, during production by additive manufacturing, in particular by a method of printing by Digital Light Processing (DLP), all of the portions of the protuberances solidified slice by slice are attached to the core by the applicator element. A portion that is not, at a moment in the production of the applicator by a method of printing 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 production in accordance with the digital model.

Lastly, the presence of at least one protuberance on the body of the applicator elements provides at least one reserve of product at a certain radial distance from the core, allowing the eyelashes and/or eyebrows to be loaded without them having to be engaged at a depth within the applicator member.

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

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

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

The envelope surface may have any shape. Preferably, the envelope surface is cylindrical.

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

Preferably, the envelope surface is defined by the distal end of the applicator elements comprising at least one protuberance.

The core extends along a longitudinal axis.

The expression“longitudinal axis of the core” denotes the line connecting all of the centers of gravity of the cross sections of the core. The longitudinal axis may be a central axis, or even an axis of symmetry for the core, notably when the core has a circular cross section or a cross section in the overall shape of a regular polygon. The longitudinal axis of the core may be rectilinear or curved and may be contained in a plane, which may be a plane of symmetry for some or even for all of the cross sections of the core. Preferably, the longitudinal axis of the core is rectilinear and coincident with the longitudinal axis of a stem supporting the applicator member.

Preferably, the longitudinal axis of the core is rectilinear. As an alternative, this axis may have one or more curves.

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

The core may be solid or hollow. The core may comprise longitudinal openings. The latter allow product accumulation. 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.

Preferably, the core comprises 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, in particular between 2 and 60 turns, better still between 3 and 40 turns over the entire length of the applicator member.

As an alternative, the core is cylindrical.

The applicator elements may be in the form of spikes or of teeth; preferably, the applicator elements borne by the core are in the form of spikes.

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

The applicator elements may be distributed over the core in at least one row, better still two rows of applicator elements.

Preferably, the row or rows of applicator elements extend(s) helically around the longitudinal axis of the core, preferably over at least one turn, better still over a plurality of turns, in particular between 2 and 60 turns, better still between 3 and 40 turns.

The applicator elements may each be solid or hollow.

Preferably, the bodies of the applicator elements comprising at least one protuberance each have an axis of extension:

extending in a plane transverse to the longitudinal axis of the core, or inclined at least partially toward the first longitudinal end of the applicator member.

The fact that the bodies of the applicator elements are not inclined toward the second end of the applicator member promotes penetration of the eyelashes and/or eyebrows between the applicator elements of the applicator member. During production of the applicator member by additive manufacturing, this also prevents the material from solidifying without it being attached to the core by a bridge of material. Preferably, the applicator elements comprising at least one protuberance each comprise a plurality of protuberances extending laterally from the body. This makes it possible to improve the separation of the eyelashes and to enjoy several reserves of product, notably along the height of the applicator elements.

The applicator elements comprising at least one protuberance may each comprise between 2 and 15 protuberances, preferably between 2 and 9 protuberances, even better still between 2 and 6 protuberances.

Preferably, the applicator member comprises applicator elements without protuberances. Preferably, the applicator elements without protuberances are inclined at least partially toward the first longitudinal end of the applicator member. This in particular makes it possible to limit the amount of space without applicator elements when the applicator is seen from the side, i.e. looking perpendicular to the longitudinal axis of the core.

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

Preferably, the applicator elements without protuberances have a circular or polygonal cross section.

Preferably, the applicator elements without protuberances are spikes. Preferably, they taper from their base toward their distal end. Such applicator elements allow good separation of the eyelashes.

The applicator elements without protuberances may extend along an axis of extension that is rectilinear or not. Their distal end may be curved and have a hook.

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

As an alternative, all of the applicator elements each comprise:

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

The applicator elements of the row may be aligned following the helix defined by the corresponding groove.

The rows of applicator elements may comprise applicator elements with at least one protuberance alternating with applicator elements without protuberances. This allows both good separation of the eyelashes and/or eyebrows, in particular by the applicator elements without protuberances, and good loading of the eyelashes and eyebrows with cosmetic product, in particular by the applicator elements comprising at least one protuberance.

As an alternative, all of the applicator elements comprise a body and at least one protuberance as mentioned.

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

The height of at least one applicator element, measured from the core, may be between 0.3 mm and 5 mm, or even between 0.5 mm and 3 mm.

“ Height of an applicator element” denotes the distance measured along the axis of extension of the applicator element between its free end and its base via which it is attached to the core.

Preferably, the height of the applicator elements comprising at least one protuberance varies, for example in a monotonous manner, along the longitudinal axis of the core. As an alternative, the height of the applicator elements comprising at least one protuberance is constant along the longitudinal axis of the core. The height of the applicator elements comprising at least one protuberance may decrease in the direction of the distal and proximal ends of the applicator member.

Preferably, the height of the applicator elements without protuberances varies, for example in a monotonous manner, along the longitudinal axis of the core. As an alternative, the height of the applicator elements without protuberances is constant along the longitudinal axis of the core. The height of the applicator elements without protuberances may decrease in the direction of the distal and proximal ends of the applicator member, which may facilitate passing through the wiping member.

Preferably, the distal ends of the applicator elements comprising at least one protuberance define the envelope surface of the applicator member.

Preferably, the distal ends of the applicator elements without protuberances define a secondary envelope surface inscribed within the envelope surface of the applicator member. The secondary envelope surface may be spaced apart from the envelope surface of the applicator member, in cross section, by a constant distance.

The applicator member may comprise applicator elements with or without protuberances at their distal end.

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

Preferably, the body of the applicator elements with protuberances tapers from its base toward its distal end over substantially the whole of its length.

Preferably, the body of each applicator element comprising at least one protuberance is such that, for all of the cross sections of the body, moving in the direction from the base of the body toward its distal end, each point on the outer surface of the body is connected to at least one point on the outer surface of the body of each subsequent cross section by a vector oriented perpendicular to the longitudinal axis of the core and/or oriented toward the first longitudinal end of the applicator member.

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

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

Preferably, all of the protuberances are such that, for every cross section of the protuberance, moving in the direction from the base of the protuberance toward its distal end, each point located on the outer surface of the protuberance in this section is connected to each point on the outer surface of the protuberance in every other cross section, considered in the direction from the cross section of the protuberance toward the distal end of the protuberance, in the same longitudinal plane of the protuberance and on the same side of the protuberance as said point located on the outer surface of the protuberance, by a vector oriented perpendicular to the longitudinal axis of the core and/or oriented toward the first longitudinal end of the applicator member.

Preferably, all of the protuberances of the applicator elements extend from the body stretching laterally with respect to the core and/or toward the first end of the applicator member.

“ Stretching laterally with respect to the core” means that the protuberances stretch along an axis extending at least partially in a plane transverse to the core.

“ Stretching toward the first end of the applicator member” means that the protuberances stretch along an axis extending at least partially toward the first end of the applicator member.

“All of the protuberances of the applicator elements extending from the body stretching laterally and/or toward the same end of the applicator member” means that none of the protuberances stretches, even partially, toward the second end of the applicator member.

At least one protuberance may extend from the distal half of the body of the applicator element. This provides a reserve of product at a height on the applicator element, making it more easily accessible to the eyelashes and/or eyebrows. Preferably, the protuberances extend along axes of extension making at their base a non-zero angle with the axis of extension of the corresponding body, in particular making an angle of between 45 and 90°, preferably not perpendicular to the axis of extension of the corresponding body, better still between 60 and 75°. The protuberances may be oriented radially outward or, preferably toward the longitudinal axis. Such an orientation of the protuberances makes it possible to catch the eyelashes, improving separation of the eyelashes and/or eyebrows and the application of the cosmetic product with the applicator.

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

At least two protuberances of an applicator element, preferably of each applicator element comprising protuberances, may extend along axes of extension extending, at the base of the protuberances, from different longitudinal planes of the body. Said longitudinal planes of the body may form an angle of between 0 and 180° between them, preferably between 45 and 125°. At least two protuberances of an applicator element, preferably of each applicator element comprising protuberances, may extend from opposite faces of the body.

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

At least two protuberances of an applicator element, preferably of each applicator element comprising protuberances, may extend from the body at different heights on the latter relative to the base thereof. The two protuberances extending at different heights on the body may extend along axes of extension extending at the base of the protuberances in the same longitudinal plane of the body or in different longitudinal planes.

The applicator elements may each comprise at least three protuberances, one of which extends stretching toward the end of the applicator member and two extending stretching laterally with respect to the core, and extending from opposite faces of the body.

Preferably, the applicator elements are each symmetrical relative to a median plane. The applicator elements comprising at least one protuberance may be without an axis of symmetry.

Preferably, the applicator elements comprising at least one protuberance extend in a plane transverse to the longitudinal axis of the core, being inclined at their base relative to the radial axis of the core at their base, in particular making an angle of between 0 and 90°, better still between 5 and 30°, even better still between 10 and 20°.

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

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

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

The product is preferably a mascara.

A further subject of the invention is a method for producing an applicator according to the invention, as defined above, wherein a blank of the applicator member or the applicator member itself is produced in successive layers with relative movement of the part already built in the direction away from the build zone, all of the protuberances extending from the body in such a way that, during production, the portions of the protuberances built are always attached to the core by a bridge of material.

None of the protuberances comprises a portion extending toward the part of the applicator member already built with respect to the base of said portion.

The applicator member may be produced starting from its distal part and the applicator elements may be without protuberances extending at least partially toward the distal end.

The applicator member may be produced starting from its proximal part and the applicator elements may be without protuberances extending at least partially toward the proximal end.

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

Such a method also allows the development of new forms of applicator member, particularly ones which are impossible to produce by injection molding because of the presence of undercuts. The method may comprise:

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

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

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

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

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

The production method by additive manufacturing may be a process of filament deposition printing (FDM), stereo lithography (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 so as to solidify the fused parts, e) repeating steps a) to d), the layer of powdery material previously deposited forming the printing substrate, so as to produce continuously, in successive layers, solid parts adhering to one another so as to form the applicator member.

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

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

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

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

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

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

a) localized irradiation by a light source, notably a laser, in a predefined build zone, of a fluid photo-crosslinkable material contained in a vat so as to 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 release the polymerized solid parts from the build zone, the build zone once again filling up with fluid photo-crosslinkable material,

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

The vat preferably comprises 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, even between 100 pm and 10 pm. Preferably, the localized irradiation and movement of the substrate 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 method preferably comprises an additional step of heating the applicator member formed. This improves polymerization of the material of the applicator member produced.

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

Brief description of the drawings

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

[Fig 1] shows an application and packaging device according to the invention, [Fig 2] is a schematic representation, in profile, of an applicator member of an applicator according to the invention,

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

[Fig 4] is a view along IV of the applicator member of figure 2 or 3,

[Fig 5] is a view of a detail according to V of the applicator member of figures

1 to 4,

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

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

[Fig 8] is a view in cross section along VIII- VIII in figure 2,

[Fig 9] is a view in cross section along IX-IX in figure 2, [Fig 10] is a view of a detail according to X of figure 7,

[Fig 11] shows an alternative form of an applicator element of an applicator according to the invention,

[Fig 12] shows an alternative form of an applicator element of an applicator according to the invention,

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

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

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

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

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

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

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

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

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

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

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

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

[Fig 25] shows an alternative form of an applicator element of an applicator according to the invention, [Fig 26] shows an alternative form of an applicator element of an applicator according to the invention,

[Fig 27] shows an alternative form of an applicator element of an applicator according to the invention,

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

[Fig 29] shows an alternative form of an applicator element of an applicator according to the invention,

[Fig 30] shows an alternative form of an applicator element of an applicator according to the invention,

[Fig 31] shows an alternative form of an applicator element of an applicator according to the invention,

[Fig 32] shows an alternative form of an applicator element of an applicator according to the invention,

[Fig 33] shows an alternative form of an applicator element of an applicator according to the invention,

[Fig 34] shows an alternative form of an applicator element of an applicator according to the invention,

[Fig 35] shows an alternative form of an applicator element of an applicator according to the invention,

[Fig 36] shows an alternative form of an applicator element of an applicator according to the invention,

[Fig 37] shows an alternative form of an applicator element of an applicator according to the invention,

[Fig 38] shows an alternative form of an applicator element of an applicator according to the invention,

[Fig 39] shows an alternative form of an applicator element of an applicator according to the invention,

[Fig 40] shows an alternative form of an applicator element of an applicator according to the invention,

[Fig 41] shows an alternative form of an applicator element of an applicator according to the invention, [Fig 42] shows an alternative form of an applicator element of an applicator according to the invention,

[Fig 43] shows an alternative form of an applicator element of an applicator according to the invention,

[Fig 44] shows an alternative form of an applicator element of an applicator according to the invention,

[Fig 45] shows an alternative form of an applicator element of an applicator according to the invention,

[Fig 46] shows an alternative form of an applicator element of an applicator according to the invention,

[Fig 47] shows an alternative form of an applicator element of an applicator according to the invention,

[Fig 48] shows an alternative form of an applicator element of an applicator according to the invention,

[Fig 49] shows an alternative form of an applicator element of an applicator according to the invention,

[Fig 50] a to f show steps in the production of the applicator member according to the invention,

[Fig 51] shows a device for producing the applicator member according to the production steps of figures 50a-f,

[Fig 52] shows a first step of an alternative method for producing the applicator member according to the invention, and

[Fig 53] shows a second step of the alternative method for producing the applicator member according to figure 52.

Detailed description

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

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

The container 3 may also be produced differently.

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

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

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

The wiping member 6 may be made of elastomer.

The wiping member 6 may comprise a wiping orifice 6a with a circular shape, optionally with slots.

The diameter of the wiping orifice 6a of the wiping member 6 is for example between 2.5 and 6 mm, being for example around 3.5 mm or 5 mm.

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

The wiping member may also be adjustable, if appropriate.

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

Preferably, and as in the example in question, the longitudinal axis Y of the stem 7 is rectilinear and coincident with the longitudinal axis of the container 3 when the applicator 2 is in place thereon, but it would not constitute a departure from the scope of the present invention if the stem 7 were not rectilinear, forming for example an elbow. If need be, the stem 7 may have an annular narrowing at its portion that is positioned opposite the lip of the wiping member 6, so as not to mechanically stress the latter unduly during storage.

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

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

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

One example of an applicator member according to the invention is described in relation to figures 2 to 9 below.

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

The core 10 is elongate along a longitudinal axis X. The longitudinal axis X is rectilinear but, as an alternative, could have any other shape, in particular curved. The longitudinal axis X is central, but this does not have to be the case.

The length H of the core 10 is, for example, between 15 mm and 27 mm.

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

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

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

Each row comprises, for example, between 20 and 150 spikes, better still between 50 and 100 spikes.

The applicator elements are aligned with one another at their base along the corresponding row.

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

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

applicator elements 18b without protuberances.

The applicator elements 18b without protuberances may be in the form of spikes with a circular section and tapering toward their distal end. As shown in figure 9, the applicator elements 18b may be inclined toward the distal end 11 of the applicator member 8 relative to the radial axis at their base, by an angle a of between 5° and 25°, for example substantially equal to 15°.

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

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

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

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

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

The height L of the body, measured from the core along the rectilinear part C_a of the axis of elongation C, from the base of the applicator element 20_p to its distal end 20_d, may be between 0.2 mm and 5 mm, for example between 0.5 mm and 3 mm.

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

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

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

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

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

The applicator elements 18b may define, by their distal ends, an additional envelope surface S2, shown in figure 4, inscribed within the envelope surface Si and having the same shape. The distance e between the additional envelope surface S2 and the envelope surface Si may be constant, and in particular between 0 and 3 mm, for example substantially equal to 0.5 mm. Thus, the applicator elements 18b may be smaller than the adjacent applicator elements 18a, the distance between the distal ends of adjacent applicator elements 18a and 18b, in projection along an axis transverse to the core 10, being equal to the distance e.

In the embodiment described above, the protuberances 22 all have the same shape, but this does not have to be the case. For example, the protuberances 22c may have a different shape to the protuberances 22a and 22b, in particular owing to their different orientations relative to the core.

Figures 11 to 27 show shapes of protuberances 22c which differ from those of the embodiments of figures 1 to 10.

The protuberances shown in figures 11 to 19 could also extend in a different plane transverse to the longitudinal axis C of the core while still being oriented laterally to the longitudinal axis X and/or in the direction of the distal end 11 of the applicator member.

As shown in figures 11 to 14, the protuberance 22c may form a fin facing the base 30 or the distal end 32 of the body; the fin may be connected to the core 10 by flat, concave or outwardly convex surfaces. For example, the protuberance 22c may comprise two flat surfaces connected to one another and to the body to form a fin oriented toward the base 30 of the body 20, as shown in figure 11, or oriented toward the distal end 32 of the body, as shown in figure 12, or the protuberance 22c may comprise a concave surface and a convex surface to form a fin oriented toward the base 30 of the body 20, as shown in figure 13, or toward the distal end 32 of the body, as shown in figure 14.

As shown in figure 15, the protuberance 22c may be of triangular shape, and joined to the body by one of its apexes.

The protuberance 22c may form a boss on the body, as shown in figure 16.

As shown in figures 17 and 18, the protuberance 22c may form a hook oriented toward the base 30 of the body 20, as shown in figure 18, or toward the distal end 32 of the body, as shown in figure 17.

The protuberance 22c may take the form of a loop extending in a plane transverse to the axis C, as shown in figure 19.

As shown in figures 20 to 22, the protuberance 22c may comprise, when seen end-on and/or from the side, an enlarged end 24 which is flattened or not flattened, oriented perpendicular to the axis C, as shown in figure 20, or making an angle with the latter, as shown in figure 21.

The protuberance 22c may have a curved axis of extension P. The protuberance 22c may in this case extend, at its end, laterally to the longitudinal axis X, as shown in figure 23.

The protuberance 22c may form a loop extending in a plane transverse to the axis of extension C, as shown in figure 24.

Figure 25 shows an alternative protuberance 22a or 22b extending partially toward the distal end 11 of the applicator member. The protuberance 22a has a curved axis of extension in such a way that its distal end is oriented toward the distal end 11 of the applicator member. In this embodiment, the applicator elements 18a may be without protuberances 22c extending from their base toward the distal end 11 of the applicator member.

In the embodiment described above, the applicator elements 18a comprise protuberances 22 extending in two different transverse planes of the axis of extension C, but this does not have to be the case. For example, the applicator elements may only comprise one or several protuberances 22c as shown in figures 11 to 22, or protuberances 22a and 22c only, or comprise protuberances 22 extending in three different transverse planes as shown in figure 49, or comprise one or more protuberances oriented in a plane transverse to the axis of extension C making a non-zero, non-perpendicular angle with the longitudinal axis X of the core as shown in figures 47 and 48.

In the embodiment described above, the applicator elements 18a comprise several protuberances 22 extending one above the other on the body, but this does not have to be the case. The applicator elements 18a may comprise only one protuberance in a transverse direction of the body 20.

In the embodiment described above, the body 20 of the applicator elements is in the shape of spikes extending along a rectilinear axis C. However, it may have any other shape that can be produced by additive manufacturing, for example

a flattened shape as shown in figures 32, 36, 37, 40, 41, 43 and 45, a shape enlarged at its distal end in the direction transverse to the longitudinal axis X, as shown in figures 26 to 29, 32 and 39, and/or to its base, as shown in figures 32, 36-38, 41, 43 and 45,

a shape extending along a curved axis of extension C, as shown in figures 30 and 42, 44 and 46, for example in the shape of a hook at its distal end as shown in figures 42 and 44,

a shape comprising one or more bends, as shown in figures 28, 29, 31 to 38 and 45,

a shape extending for example in the shape of a V, as shown in figure 38, or an X, or having a V or an X at the end, as shown in figures 28 and 29, a shape extending in the shape of an arrow, the tip being oriented toward the distal end 32 of the body, as shown in figure 39, or toward the base 30, as shown in figure 40, and/or

a shape forming a loop, as shown in figures 30 and 46.

As shown in figures 30, 33 to 35 and 46, the body 20 may be solid or hollow.

Preferably, the body 20 of the applicator elements 18a is such that, for all of the cross sections T of the body, moving in the direction from the base 30 of the body 20 toward its distal end 32, each point on the outer surface of the body is connected to at least one point on the outer surface of the body of each subsequent cross section by a vector V oriented perpendicular to the longitudinal axis X and/or oriented toward the distal end 11 of the core 10. The body thus does not comprise a portion extending toward the proximal end 13 of the core. The invention is not limited to the embodiments described above. Other shapes of protuberances and bodies are envisageable, as are other arrangements of protuberances on the body. The embodiments described above may be combined, unless explicitly stated otherwise. The applicator member may comprise only one type of applicator element with at least one protuberance. The bodies of the applicator elements may not all have the same shape.

In the embodiment described above, the applicator elements and the protuberances are without portions extending toward the proximal end 13 of the core and at least one protuberance extends at least partially toward the distal end 11 of the applicator member. As an alternative, the applicator elements and the protuberances are without portions extending toward the distal end 11 of the applicator member and at least one protuberance extends at least partially toward the proximal end 13 of the applicator member.

The applicator member 8 may be produced by means of a device for production by additive manufacturing, on the basis of a digital model of the applicator member 8.

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

As shown in Figures 50a-f and 51, 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 50a, moving the material dispenser 53 along the axis Yd. One or more coalescence agents 65 and/or coalescence modifiers 67 are then deposited on the parts of the layer 63, as shown in figure 50a, by moving the associated dispensers along the axis Yd. The parts of the layer 63 on which the agents 65 and the modifiers 67 are deposited are determined according to the digital model created beforehand. Once the coalescence agents 65 and coalescence modifiers 67 have been deposited, they penetrate the layer 63 at least partially, as can be seen in figure 50b. Lastly, 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, thus allowing, once the layer has cooled, the fused parts to solidify as shown in figure 50c. The modifiers 67 make it possible to obtain distinct edges of the fused zones by preventing fusion of the peripheral zones. After the layer of material 63 has been treated, as described above, a new layer 73 of powdery material is deposited on the layer 63 treated previously, as shown in figure 50d. The method explained above may then be repeated to generate the three-dimensional applicator member layer by layer, as shown in figures 50d-f.

During production, the substrate 51 moves along the axis z in such a way that, as new layers of material are deposited, a predefined gap is maintained between the surface of the layer deposited most recently and the dispensers 55 and 57. As an alternative, the substrate 51 does not move along the axis z and the dispensers 55 and 57 may be able to 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 attached to the stem 7, to its distal end 11. The reverse is also possible.

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

As an alternative, the applicator member 8 is produced using a different device for production by additive manufacturing, in particular by light irradiation of a photo- crosslinkable material, as shown in figures 52 and 53. In the example in question, the production device may comprise a light source 40, a vat 42 arranged above the light source 40, and a substrate 46. The vat 42 is at least partially transparent to the radiation emitted by the light source. It contains a liquid photo-crosslinkable material 44.

During production, the light source 40 is operated in accordance with the digital model to crosslink the liquid material 44 in a build zone between the substrate 46 and the plate 42, in a pattern dependant on the digital model. The crosslinked parts of the liquid material 44 are solid. Before production, as shown in figure 52, 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 53, the substrate 46 is moved away from the light source 40 at the speed of production of the applicator member 8, such that the crosslinked parts are produced in successive layers, each crosslinked layer becoming attached to the one before.

The vat 42 may comprise a surface 48 between the substrate 46 and the fight source 40 which is in fluidic communication with a source of polymerization inhibitor, notably 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 toward the build zone. Preferably, the fluid zone has a height of between 10 pm and 100 pm.

It may be that the interface between the fluid zone and the build zone is not distinct but may be formed with a polymerization gradient. In this case, the substrate 46 is moved continuously, and irradiation by the light source 40 is continuous.

Preferably, the applicator member 8 is produced by means of this device, from its proximal end 13 to its distal end 11 The reverse is also possible.

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

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

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

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

The device may comprise a reservoir of product and the applicator is mounted via its proximal end 13 on the reservoir. In this case, the applicator comprises a hollow core and openings for supplying the applicator with cosmetic product.

Claims

1. Applicator (2) for applying a cosmetic product (P), comprising an applicator member (8) obtained by additive manufacturing, the applicator member (8) having a first and a second longitudinal end (11, 13), the applicator member (8) comprising:

- a core (10) extending along a longitudinal axis (X), and

- a plurality of applicator elements (18, 18a, 18b) extending from the core (10), the applicator elements (18a) each comprising:

o a body (20) of elongate shape, and

o one or several protuberances (22, 22a, 22b, 22c) extending laterally from the body (20), at least one protuberance (22a, 22c) extending at least partially in the direction of the first longitudinal end (11, 13) of the applicator member, all of the protuberances (22, 22a, 22b, 22c) of the applicator elements (18a) being such that, for every cross section of the protuberance (22, 22a, 22b, 22c), each point on the outer surface of the protuberance (22, 22a, 22b, 22c) in this section is connected to at least one point on the outer surface of the protuberance (22, 22a, 22b, 22c) in every other cross section, considered in the direction from the section toward the distal end of the protuberance, by a vector (V_p) oriented perpendicular to the longitudinal axis (X) of the core and/or oriented toward the first longitudinal end (11, 13) of the applicator member (8), wherein the applicator member (8) is obtained on the basis of a pre- established digital model by solidification of a raw material, slice by slice, from a second longitudinal end (11, 13) of the applicator member to the first longitudinal end (11, 13) of the applicator member.

2. Applicator (2) for applying a cosmetic product (P), having an applicator member (8) obtained by additive manufacturing, the applicator member (8) having a first and a second longitudinal end (11, 13), the applicator member (8) comprising:

- a core (10) extending along a longitudinal axis (X), and

o a body (20) of elongate shape, and o several protuberances (22, 22a, 22b, 22c) extending laterally from the body (20), at least one protuberance (22a, 22c) extending at least partially in the direction of the first longitudinal end (11, 13) of the applicator member, all of the protuberances being such that, for every cross section of the protuberance (22, 22a, 22b, 22c), each point on the outer surface of the protuberance (22, 22a, 22b, 22c) in this section is connected to at least one point on the outer surface of the protuberance (22, 22a, 22b, 22c) in every other cross section, considered in the direction from the section toward the distal end of the protuberance, by a vector (V_p) oriented perpendicular to the longitudinal axis (X) of the core and/or oriented toward the first longitudinal end (11, 13) of the applicator member (8).

3. Applicator (2) for applying a cosmetic product (P), having an applicator member (8) obtained by additive manufacturing, the applicator member (8) having a first and a second longitudinal end (11, 13), the applicator member (8) comprising:

a core (10) extending along a longitudinal axis (X), and

a plurality of applicator elements (18, 18a, 18b) extending from the core (10), the applicator elements (18a) each comprising: o a body (20) of elongate shape, and o one or several protuberances (22, 22a, 22b, 22c) extending laterally from the body (20), at least one protuberance (22a, 22c) extending at least partially in the direction of the first longitudinal end (11, 13) of the applicator member, all of the protuberances (22, 22a, 22b, 22c) of the applicator elements (18a) being such that, for every cross section of the protuberance (22, 22a, 22b, 22c), each point on the outer surface of the protuberance (22, 22a, 22b, 22c) in this section is connected to at least one point on the outer surface of the protuberance (22, 22a, 22b, 22c) in every other cross section, considered in the direction from the section toward the distal end of the protuberance, by a vector (V_p) oriented perpendicular to the longitudinal axis (X) of the core and/or oriented toward the first longitudinal end (11, 13) of the applicator member (8), wherein the applicator elements (18, 18a, 18b) are distributed over the core (10) in at least one row, the row of applicator elements extending helically around the longitudinal axis of the core over a plurality of turns between 3 and 40 turns.

4. The applicator as claimed in claim 2 or 3, wherein the applicator member (8) is obtained on the basis of a pre-established digital model by solidification of a raw material, slice by slice, from a second longitudinal end (11, 13) of the applicator member to the first longitudinal end (11, 13) of the applicator member.

5. The applicator as claimed in claims 1 or 3, wherein the applicator elements comprising the or several protuberances (18a) each comprise a plurality of protuberances (22, 22a, 22b, 22c) extending laterally from the body (20).

6. The applicator as claimed in claims 1 or 2, wherein the applicator elements (18, 18a, 18b) are distributed over the core (10) in at least one row, better still two rows of applicator elements.

7. The applicator as claimed in claim 6, wherein the row or rows of applicator elements extend(s) helically around the longitudinal axis of the core, preferably over at least one turn, better still over a plurality of turns, in particular between 5 and 30 turns, better still between 8 and 20 turns.

8. The applicator as claimed in any one of the preceding claims, wherein the core comprises 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.

9. The applicator as claimed in any one of the preceding claims, wherein the bodies (20) of the applicator elements comprising the or several protuberances (18a) each have an axis of extension (C):

- extending in a plane (M) transverse to the longitudinal axis (X) of the core, or

- inclined at least partially toward the first longitudinal end (11, 13) of the applicator member.

10 The applicator as claimed in any one of the preceding claims, wherein the body (20) of each applicator element comprising the or several protuberances (18a) is such that, for all of the cross sections of the body (20), moving in the direction from the base (30) of the body toward its distal end (32), each point on the outer surface of the body is connected to at least one point on the outer surface of the body in every other cross section, considered in the direction from the section toward the distal end of the protuberance, by a vector ( V,,) oriented perpendicular to the longitudinal axis (X) of the core and/or oriented toward the first longitudinal end (11, 13) of the applicator member.

11. The applicator as claimed in any one of the preceding claims, wherein all of the protuberances (22, 22a, 22b, 22c) of the applicator elements (18a) extend from the body (20) stretching laterally with respect to the core (10) and/or toward the first end (11, 13) of the applicator member.

12. The applicator as claimed in any one of the preceding claims, wherein the or several protuberances (22, 22a, 22b, 22c) extends from the distal half of the body (20) of the applicator element (18a).

13. The applicator as claimed in any one of the preceding claims, wherein the protuberances (22, 22a, 22b, 22c) extend along axes of extension (P) making at their base a non-zero angle g with the axis of extension of the corresponding body, in particular making an angle g of between 45 and 90°, preferably not perpendicular to the axis of extension of the corresponding body, better still between 60 and 75°.

14. The applicator as claimed in any one of the preceding claims, wherein the applicator elements comprising the or several protuberances (18a) each comprise a plurality of protuberances (22, 22a, 22b, 22c) extending laterally from the body (20), at least two protuberances (22, 22a, 22b, 22c) of an applicator element (18a), preferably of each applicator element comprising protuberances (18a), extending along axes of extension (P) extending, at the base of the protuberances (23), from different longitudinal planes of the body.

15. The applicator as claimed in any one of the preceding claims, wherein the applicator elements comprising the or several protuberances (18a) each comprise a plurality of protuberances (22, 22a, 22b, 22c) extending laterally from the body (20), at least two protuberances (22, 22a, 22b, 22c) of an applicator element (18a), preferably of each applicator element comprising protuberances (18a), extending along axes of extension (P) extending, at the base of the protuberances (23), from different longitudinal planes of the body.

16. The applicator as claimed in any one of the preceding claims, wherein the applicator elements comprising at least one protuberance (18a) extend in a plane transverse to the longitudinal axis of the core, being inclined at their base (30) relative to the radial axis (R) of the core (10) at their base (30), in particular making an angle b of between 0 and 90°, better still between 5 and 30°, even better still between 10 and 20°.

17. The applicator as claimed in any one of the preceding claims, wherein the applicator member (8) comprises applicator elements without protuberances (18b).

18. The applicator as claimed in claim 17, wherein the applicator elements without protuberances (18b) are inclined at least partially toward the first longitudinal end (11, 13) of the applicator member.

19. Device (1) for packaging and applying a product (P) to the eyelashes and/or eyebrows, comprising an applicator (2) as claimed in any one of the preceding claims and a container (3) containing the product (P).

20. A method for producing an applicator as claimed in any one of claims 1 to 16, wherein a blank of the applicator member (8) or the applicator member (8) itself is produced in successive layers with relative movement of the part already built in the direction away from the build zone, all of the protuberances (22, 22a, 22b, 22c) extending from the body (20) in such a way that, during production, the portions of the protuberances built are always attached to the core (10) by a bridge of material.

21. A method for making up the eyelashes and/or eyebrows using an applicator as claimed in any one of claims 1 to 18, wherein the product is applied by bringing the applicator into contact with the eyelashes and/or eyebrows.