ES2650399T3 - Brush and packaging and application device comprising said brush - Google Patents

Abstract

Brush applicator for the application of a cosmetic product comprising a rod (4) and a single tuft of bristles supported by the rod, characterized by the fact that this single tuft of bristles comprises at least 500 bristles having a cross section larger dimension between 4/100 mm and 6/100 mm, and that the bristles are fixed by a clip in a housing (22) installed at the distal end (20) of the rod, or that the bristles are maintained by fastening or by adhesive at the bottom of a housing (22) installed on the distal end (20) of the rod

Description

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DESCRIPTION

Brush and packaging and application device comprising said brush

[0001] The present invention relates to brush applicators for the application of a cosmetic, makeup or care product, for example a product such as a nail polish or a nail care product, and packaging devices and of application comprising such applicators.

[0002] US 6 390 708 and FR 2 825 247 and FR 2 663 826 patent applications are intended for nail polish brush applicators or a mask brush for which the number of bristles is not specified.

[0003] The patent US 6 073 634 aims at a mask applicator comprising, for example, eight tufts of 200 bristles each, that is, 1600 bristles, with a diameter of 0.08 mm.

[0004] Known brushes have a tuft of bristles attached to the end of a rod and can lead to stretch marks when the product is applied, stretch marks that remain after drying.

[0005] To reduce this inconvenience, the bristle end is sharpened by grinding, but this operation increases manufacturing costs. In addition, the grinding operation is not always carried out in a reproducible and satisfactory manner.

[0006] There is, therefore, a need to benefit from brush applicators that particularly reduce the formation of stretch marks during application, without excessively increasing the manufacturing costs of the applicator.

[0007] The present invention is intended to respond in particular to this need.

[0008] This is achieved thanks to a brush applicator for the application of a product according to claim 1.

[0009] This small size of the bristles reduces the risk of stretch marks formation during application and avoids a bristle grinding operation.

[0010] The stretch marks eventually created by the bristles during application and product expansion can be filled more easily by the product thanks to its small width and the slight pressure exerted by the tuft.

[0011] The invention makes it possible to obtain a brush applicator that is easier to manufacture than a brush that undergoes a grinding operation, while obtaining a satisfactory application of the product, since the product can be advantageously deposited in a homogeneous layer and in a relatively important amount.

[0012] A brush applicator according to the invention can also, as appropriate, provide more flexibility to the application.

[0013] On the other hand, as the brush applicator comprises a large number of relatively thin bristles, the tuft of bristles may contain less material and more air between the bristles than a tuft of bristles of identical volume but comprising larger bristles in a smaller number This can allow to save materials and reduce manufacturing costs. The brush applicator can also retain more product by capillarity between the bristles and over the tuft.

[0014] A brush applicator according to the invention may contain identical or different bristles, and contain, for example, in addition to the 500 fine bristles mentioned above, thicker bristles that in cross-section have a larger dimension greater than 6.5 / 100 mm

[0015] However, preferably, the brush applicator only includes bristles that in cross-section have a larger dimension strictly less than 6.5 / 100 mm. This larger dimension can be advantageously less than or equal to 6/100 mm, even less than or equal to 5.5 / 100 mm, better still less than or equal to 5/100 mm, being for example greater than or equal to 4/100 mm .

[0016] The apparent length of the part of the bristles that exceeds the distal end of the rod can be between 5 and 20 mm, even between 10 and 17 mm, better between 12 and 14 mm.

[0017] In embodiments of the invention, the brush applicator includes between 500 and 3600 bristles, for example between 600 and 3000 bristles, particularly between 700 and 2000 bristles or between 750 and 1000 bristles, for example approximately 880 bristles. The "number of bristles" means the number of free ends on the brush applicator after it is manufactured. The bristles can come, for example,

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of a single tuft folded in two. The number of bristles of the tuft is, therefore, less than half the number of bristles of the brush applicator.

[0018] The section of at least one bristle may be substantially constant along the entire apparent length of the bristle or along at least half the length of the bristle from the free end of the bristle. Alternatively, the section of at least one bristle may vary along at least a portion of the apparent length of the bristle, even along its entire apparent length.

[0019] At least one bristle may have a non-sharpened free end. Preferably, no bristle has a free end that has undergone a grinding operation. Alternatively, at least one bristle may contain a sharp free end.

[0020] The bristles can be implanted in the rod.

[0021] The bristles can be fixed by a clip in a housing installed at the distal end of the rod. The bristles can be formed from a tuft folded over itself around the staple. The bristles can also be held by fastening or by adhesive at the bottom of the housing.

[0022] The housing may comprise a first and a second cylindrical part. The first part may be less far from the distal end of the rod than the second part, and have a larger diameter.

[0023] Alternatively, the first part may be conical and, in this case, have a minimum diameter larger than the diameter of the second part.

[0024] A rod having a housing that enlarges towards its free end, for example thanks to the presence of two cylindrical or frustoconical parts as defined above, may allow the bristle tuft to become less compact, not to press the bristles in your base and get a good product extension. The flow of the product along the rod and the bristles can also be slowed down, which can improve the autonomy of the brush applicator and decrease the risk of formation of a drop at the end of the brush applicator.

[0025] The rod may have a cross-section in a form chosen from the following list: circular, non-circular, oblong, oval, elliptical, polygonal, square, rectangular, reniform, crenellated or star-shaped, without this list being limiting

[0026] The rod may comprise in its perimeter one or several outer grooves, which extend along at least a part of its length. The rod may particularly contain at least one groove that favors the flow of the product present on the rod into a predetermined region of the bristle tuft.

[0027] The rod may comprise a cross section concentric to the cross section of the housing installed at its distal end.

[0028] The rod can be configured to favor the accumulation of the product on it and improve the autonomy of the brush applicator.

[0029] The rod may contain, for example, a sheath that creates, at least a part of the length of the rod, a space that allows a product stockpile to be formed.

[0030] The shape of the cross-section of a bristle can be chosen from the following non-limiting list: solid, hollow, particularly solid circular or hollow circular, polygonal, particularly square, triangular or rectangular, elliptical, horseshoe-shaped, of V, flat, cruciform. The tuft bristles may contain at least one capillary groove.

[0031] Modifying adjuvants of the surface state and / or surface tension can be incorporated into the bristle material, for example sliding agents, for example molybdenum bisulfide, PTFE or graphite.

[0032] The bristles may consist of a synthetic material, for example chosen from the following list: PA 6,12, polyester, Rilsan®, polyamide, polyether, polyamide-ether block, polyethylene, polytetrafluoroethylene, vinylidene polyfluoride, polyacetate , polyethylene terephthalate.

[0033] At least one bristle can be manufactured by extrusion of material.

[0034] At least two bristles may be of different diameters, shapes and / or materials. In this way, the rod can contain a mixture of bristles that have different diameters and / or shapes and / or that are of different materials.

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[0035] At least one sow can be wavy. The use of wavy bristles can make the tuft of bristles less compact. All the bristles can be wavy or, alternatively, the brush applicator can contain a mixture of wavy bristles and non-wavy bristles.

[0036] The tuft of bristles can be cut so that it has a particular shape, for example beveled.

[0037] The rod can be made of a thermoplastic material, particularly chosen from the group consisting of: polyolefins, particularly polyethylene or polypropylene, POM, polyamide, PET or PBT.

[0038] The rod may contain at one end a fixing member on a gripping member.

[0039] This fixing member may contain, for example, a nozzle intended to be inserted under pressure and / or fitted or otherwise fixed in the gripping member. The nozzle may contain a tubular skirt with a flange at its base.

[0040] The rod can be configured to cooperate tightly with a container containing the product to be applied.

[0041] The gripping member may contain fixing means on a container, for example a threading.

[0042] The applicator may contain a product stock, for example a nail polish, this product stock being for example contained in a storage attached to the tuft of bristles during application and / or in a space formed around the rod thanks to the presence of a sheath, for example, as previously mentioned.

[0043] The brush applicator can be configured to constitute a nail polish brush.

[0044] The invention also relates to a device for packaging and applying a cosmetic product comprising a brush applicator as defined above and a container containing the product to be applied.

[0045] The latter may be a product to be applied on the nails, for example a nail polish or a

nail care product. Alternatively, the product to be applied may be a lipstick, for

example.

[0046] The invention may be better understood by reading the following detailed description, of non-limiting embodiments thereof, and by examining the attached drawings, in which:

- Figure 1 is a schematic and partial axial section of a packaging and application device according to the invention,

- Figure 2 depicts the rod and the bristles of the device of Figure 1 in isolation,

- figure 3 schematically represents the distal end of the rod of figure 2,

- Figure 4 represents, schematically and in axial section, a rod according to an embodiment variant of the invention,

- Figure 5 depicts the distal end of the rod of Figure 4 in isolation in axial section,

- figure 6 is a view analogous to figure 5 of a variant embodiment,

- Figures 7 to 11 represent, schematically and partially, tufts of cut bristles,

- Figures 12 to 19 represent, in cross section, examples of section of the rod at the level of the housing that receives the bristles,

- figure 20 is a view analogous to figure 2 of the variant embodiment of figure 19,

- Figures 21 and 22 represent, in cross section, rod sections,

- Figures 23 and 24 are longitudinal sections analogous to Figure 1 of two embodiments,

- Figures 25 to 34 schematically represent examples of cross sections of

bristles according to the invention, and

- Figure 35 schematically represents an example of a wavy bristle.

[0047] In Figures 1 to 3 a packaging and application device 1 is shown comprising a container 2 with a product P for applying, for example a nail polish, and a brush applicator 3 comprising a rod 4 extended at a distal end 20 by bristles 6 for product application.

[0048] The bristles 6 supported by the rod have, in the example considered, a larger cross-sectional dimension strictly less than 6.5 / 100 mm, for example between 4/100 mm and 6/100 mm, for example 5/100 mm approximately.

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[0049] The apparent length L of the bristles that exceed the rod 4 is, for example, between 12 and 14 mm.

[0050] Brush applicator 3 includes a large number of bristles, particularly between 500 and 3600, namely approximately 880 bristles in the example considered.

[0051] The section of at least one bristle 6 can be substantially constant along the entire apparent length of the bristle.

[0052] At least one bristle 6 can have a non-sharpened free end, and preferably none of the bristles of the brush applicator has been subjected to grinding to sharpen its end.

[0053] The rod 4 includes at one end 9 a fixing member 10 intended to be housed in a gripping member 15 which in turn constitutes a closure cap of the container.

[0054] The fixing member 10 includes a nozzle 11 intended to be fitted or pressurized in the gripping member 15. The flange 12 may allow to obtain a tight seal of the container 2, when resting against the upper surface of the neck 16 of the container 2.

[0055] Of course, the fixing of the rod 4 in the gripping member 15 could be carried out in another way without going beyond the scope of the present invention, for example by fitting.

[0056] The rod 4 can also be manufactured in one piece with the gripper.

[0057] The gripping member 15 may be provided internally, as illustrated, with a threading 18 which allows the screwing into the neck 16 of the container 2.

[0058] In the example of Figures 1 to 3, the bristles 6 are received in a housing 22 installed at the distal end 20 of the rod 4. The tuft of bristles can be fixed particularly by means of a clip 25 in the housing 22, as illustrated in Figure 3, or by any other appropriate means, particularly by adhesive, welding, rod die cutting and / or by clamping.

[0059] An exemplary embodiment is illustrated in FIGS. 4 and 5 in which the bristles 6 are fixed by fastening at the bottom of a housing 22 having two cylindrical parts of different diameters, namely a first cylindrical part 26 of larger diameter and a second cylindrical part 27 of smaller diameter, which defines the bottom of the housing and in which the bristles are retained. Such a configuration allows to obtain a tuft of bristles that has a better performance during application, particularly a better product exposure.

[0060] Also alternatively, the housing 22 may contain, instead of the first cylindrical part, a truncated conical part of a minimum diameter greater than the diameter of the second part, as illustrated in Figure 6.

[0061] The bristle tuft 6 can be given any shape, for example by cutting the strand when the bristles are placed in place on the rod. The free end of the bristles 6 can be cut so that the end of the applicator is rectilinear, as illustrated in Figure 7, perpendicular to the axis of the rod 4, or with a concave curved shape as illustrated in the Figure 8, or convex as illustrated in Figure 9, beveled as illustrated in Figure 10, or even cut to the tip as illustrated in Figure 11.

[0062] The distal part 20 of the rod 4 can be made with different cross-sections at the level of the housing 22 intended to receive the bristles 6. Different examples of cross-section, among others, are shown in Figures 12 to 18.

[0063] The rod 4 may be particularly circular in section, as illustrated in Figure 12, oblong, as illustrated in Figure 13, particularly oval or elliptical, polygonal as illustrated in Figures 14 and 15, particularly square or rectangular, reniform as illustrated in Figure 16, crashed as illustrated in Figure 17 or crenellated as illustrated in Figure 18.

[0064] The rod 4 may contain at least one longitudinal groove 30 which ends for example in the longitudinal half of a larger side of the housing containing the bristles, as illustrated in Figures 19 to 21.

[0065] In the exemplary embodiment of Figure 21, the cross section of the rod is concentric with the cross section of the housing, such that the thickness of the rod at the level of the housing is constant throughout the perimeter of the housing.

[0066] As appropriate, as illustrated in Figures 22 and 23, the rod 4 may be surrounded by a sheath 32 which creates together with the rod 4 a space 33 in which the product can accumulate. This space

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33 may have a dimension that varies along the entire perimeter of the rod 4. In particular, the dimension of the space 33 may be greater than the level of the grooves 30, which may allow constituting more important product reserves in this position .

[0067] The brush applicator illustrated in Figures 22 and 23 can be used as follows. Before application, the container 2 can be agitated with the closure capsule 5 placed in place, which can have the effect of penetrating more product P into space 33. When the brush applicator separates from container 2, product P remains contained in space 33. The brush applicator can thus have a relatively large autonomy, which allows, for example, to apply the varnish on a nail in a single layer, without having to re-immerse the brush applicator in the container 2.

[0068] The product present in space 33 may thus come from container 2.

[0069] Alternatively, it may come from a product reservation attached to the brush applicator during application.

[0070] As an example, a brush applicator 3 comprising a reservoir 35 containing the product P, and a rod crossed by a product transport channel 36 towards the bristles 6 has been illustrated in Figure 24.

[0071] The bristles 6 can be very diverse in nature and particularly bristles having one of the cross sections illustrated in Figures 25 to 34 can be used. It can be, for example, a hollow and circular contour cross-section, as illustrated in Figure 25, of a solid and circular contour cross-section as illustrated in Figure 26, of a polygonal cross-section, as illustrated in Figures 27 to 29, for example square, triangular or rectangular, or even of an oblong cross section, for example of elliptical or oval contour as illustrated in Figure 30, or even flattened, as illustrated in Figure 31.

[0072] Alternatively, the bristle 6 may contain at least one capillary groove, as illustrated in Figures 32 to 34, said bristle having, for example, a generally circular cross-section, as illustrated in Figure 32 or V-shaped, as illustrated in Figure 33 or cruciform, as illustrated in Figure 34.

[0073] The tuft of bristles 6 may contain only identical bristles or, alternatively, a mixture of bristles having shapes, sections and / or dimensions, particularly a diameter, and / or different materials.

[0074] At least one sow can be corrugated, as illustrated in Figure 35.

[0075] At least one bristle can be manufactured by extrusion of material.

[0076] The bristles may be made of at least one synthetic material, for example chosen from the following list: PA 6.12, polyester, Rilsan®, polyamide, polyether, polyamide-ether block, polyethylene, polytetrafluoroethylene, vinylidene polyfluoride, polyacetate, polyethylene terephthalate.

[0077] Modifying adjuvants of the surface state and surface tension can be incorporated into the material of the bristles, for example sliding agents, for example molybdenum bisulfide, PTFE, graphite.

[0078] The invention is not limited to the embodiments described above and in particular the characteristics of the different embodiments can be combined.

[0079] The expression "comprising a" must be understood as a synonym for "comprising at least one", unless otherwise specified.

[0080] The expression "between" must be understood within the limits included, unless otherwise specified.

Claims (27)

5 10 fifteen twenty 25 30 35 40 Four. Five fifty 55 60 65 1. Brush applicator for the application of a cosmetic product comprising a rod (4) and a single tuft of bristles supported by the rod, characterized by the fact that this single tuft of bristles comprises at least 500 bristles that have a larger cross-sectional dimension between 4/100 mm and 6/100 mm, and that the bristles are fixed by a clip in a housing ( 22) installed at the distal end (20) of the rod, or that the bristles are held by attachment or by adhesive at the bottom of a housing (22) installed at the distal end (20) of the rod. 2. Brush applicator according to claim 1, comprising bristles whose largest cross-sectional dimension is less than or equal to 5.5 / 100 mm. 3. Brush applicator according to claim 1, comprising bristles whose largest cross-sectional dimension is less than or equal to 5/100 mm. 4. Brush applicator according to any of the preceding claims, wherein the apparent length (L) of the bristles is between 5 and 20 mm. 5. Brush applicator according to any of the preceding claims, wherein the apparent length (L) of the bristles is between 10 and 17 mm. 6. Brush applicator according to any of the preceding claims, wherein the apparent length (L) of the bristles is between 12 and 14 mm. 7. Brush applicator according to any of the preceding claims, comprising between 500 and 3600 bristles, between 600 and 3000 bristles, between 700 and 2000 bristles or between 750 and 1000 bristles. 8. Brush applicator according to any of the preceding claims, wherein the section of at least one bristle is substantially constant over the entire apparent length of the bristle. 9. Brush applicator according to any of the preceding claims, wherein at least one bristle has a non-sharpened free end, and preferably no bristle has a free end that has undergone a grinding operation. 10. Brush applicator according to any of the preceding claims, wherein the bristles are fixed by a clip in a housing (22) installed at the distal end (20) of the rod. 11. Brush applicator according to any of claims 1 to 9, wherein the bristles are held by attachment or by adhesive at the bottom of a housing (22) installed at the distal end (20) of the rod. 12. Brush applicator according to one of the two immediately preceding claims, wherein the housing (22) comprises a first cylindrical or truncated conical part (26) of larger minimum diameter and a second cylindrical part (27) of smaller diameter, wherein The second part defines the housing fund. 13. Brush applicator according to any one of the preceding claims, wherein the rod has a cross-section of form chosen from the following list: circular, non-circular, oblong, oval, elliptical, polygonal, square, rectangular, reniform, crenellated , in the form of a star, with one or more grooves (30) in its perimeter. 14. Brush applicator according to any of claims 1 to 12, wherein the rod has a cross section concentric to the cross section of a housing installed at the distal end (20) of the rod. 15. Brush applicator according to any of the preceding claims, wherein the shape of the cross section of a bristle is chosen from the following list: solid, hollow, solid circular, hollow circular, polygonal, square, triangular, rectangular, elliptical, horseshoe-shaped, V-shaped, flat, cruciform. 16. Brush applicator according to any of the preceding claims, wherein at least one bristle has a capillary groove. 17. Brush applicator according to any of the preceding claims, wherein at least one adjuvant modifying the surface state and / or surface tension is incorporated into the bristle material, for example a sliding agent, particularly molybdenum bisulfide, PTFE, graphite. 18. Brush applicator according to any of the preceding claims, wherein the bristles are constituted of a material chosen from the following list: PA 6.12, polyester, Rilsan®, polyamide, polyether, 5 10 fifteen twenty 25 30 polyamide-ether block, polyethylene, polytetrafluoroethylene, vinylidene polyfluoride, polyacetate, polyethylene terephthalate. 19. Brush applicator according to any of the preceding claims, wherein at least two bristles are of different diameters, shapes and / or materials. 20. Brush applicator according to any of the preceding claims, wherein at least one bristle is corrugated. 21. Brush applicator according to any of the preceding claims, wherein the rod includes a sheath (32) that creates, at least a part of the length of the rod, a space (33) that allows a product stockpile to be constituted . 22. Brush applicator according to any of the preceding claims, wherein the rod includes an end (9) comprising a fixing member (10) on a gripping member (15). 23. Brush applicator according to the preceding claim, wherein the fixing member includes a nozzle (11) intended to be inserted under pressure and / or fitted into the gripping member. 24. Brush applicator according to any one of the preceding claims, comprising a reserve (35) of product. 25. Brush applicator according to any of the preceding claims, which constitutes a nail polish brush. 26. Device for packaging and applying a cosmetic product, characterized in that it includes a brush applicator according to any of the preceding claims and a container (2) containing the product to be applied. 27. Device according to the preceding claim, wherein the product to be applied is a product to be applied on the nails, particularly a nail polish.