MXPA97007284A - Brush for the application of a cosmetic product and make-up device that purchases it - Google Patents

Abstract

The present invention relates to a brush, characterized in that it comprises: a straight rod defining a main axis, a flexible core that defines the length of the brush, the core has a first end and a second end, the first end is secured to the straight rod, a plurality of hairs implanted radially inside the core, the hairs have ends defining a wrapping surface of the spout, the surrounding surface has a first end and a second end, wherein the brush surround has, on at least part of a length thereof, a cross section of elongated shape in a direction of a longer axis, perpendicular to the main axis, the core has a curve in a plane perpendicular to the axis of greater length, and where the hairs form a concave, exposed hollow portion and a dome porterior portion to help disperse a product that is placeable in the hairs of the portion hollow design and posteri

Description

BRUSH FOR THE APPLICATION OF A COSMETIC PRODUCT AND MAKEUP DEVICE THAT COMPRISES IT DESCRIPTION OF THE INVENTION The invention relates to a brush, in particular a brush to apply a cosmetic product on the keratin fibers, mainly to apply mascara on the eyelashes or a dye on the hair, as well as to a makeup device comprising this brush, having the brush a curved soul. Usually, a brush for the application of a cosmetic product comprises an elongated core formed by the helical winding of two branches of a metallic wire, which has been bent into a U before the branches are twisted, hairs implanted radially in this core and tight between these rolled branches. Such brushes can be of various shapes and comprise cutouts. In the case in which these brushes are used to apply a mask on the eyelashes, such shapes and cutouts are provided to allow the obtaining of a more or less loaded make-up, an elongation and a more or less important curvature of the eyelashes. Brushes are known which have the shape of a fragment of a bocel, these broaches being obtained by the twisting of a cylindrical brush in a circular arc of the soul. Such brushes have a convex face, a concave face and REF: 25625 two faces that are substantially flat. Such brushes are not easy to handle: indeed, if the user rotates between his fingers the rod of a brush of this type around its axis, to apply a product on the lashes for example, must permanently rectify the distance of the brush with respect to the lashes. With these brushes it is difficult to make up the corner of the eye without burrs on the eyelids and the fin of the nose. In addition, it has been found that a brush of this type loaded the tabs smoothing little. Brushes obtained by twisting the circle of the core of a cylinder-conical brush have the same drawbacks. Therefore, it seemed desirable to have brushes that allow the brush to take good care of the lashes to ensure a good smoothing of the product and a good separation of the lashes. The object of the invention is also to provide a brush that is still of simple and inexpensive application and of practical use. The applicant firm has unexpectedly discovered new brushes for the application of a cosmetic product, which, when used to apply a mask on the eyelashes, allow to obtain a very curved makeup, very elongated with a product distributed over the entire length of the eyelash. On the other hand, these brushes are very easy to manipulate and allow to easily make up the corner of the eye. The invention relates to a brush comprising a straight rod defining a main axis (X-X); a flexible soul, which defines the length of the brush, this soul comprising a first and second end, the first end being fixedly attached to the rod; hairs implanted radially in this core, the end of the hairs defining the surrounding surface of the brush, this envelope surface having first and second ends, characterized in that the core describes a curve (C) in a plane of curvature (P) and because the envelope surface of the brush has, over at least a part of its length, a cross-section of elongated shape along an axis of greater length (ZZ) perpendicular to the plane of curvature (P). A cross-section of the envelope surface is understood as a section of the envelope surface according to a plane perpendicular to the core. Preferably, the curve (C) is substantially circular. The part of the brush that is in the concavity of the curve (C) forms a hole. The part of the brush that is on the opposite side forms the back of the brush. The transverse sections of the brush surface being elongated, according to the axis of greatest length, in the direction perpendicular to the plane (P) of torsion of the core, the brush according to the invention has two broad and flattened faces, one in the hollow of the brush, the other on the back of the brush . The face located in the hollow of the brush is very close by its contour shape of the eyelashes. In addition, it comprises short hairs and therefore not very flexible. You can, therefore, take charge of the eyelashes over the entire width of the eyelid, load them with product, lengthen them and bend them. Since the distance between the two faces is smaller than the length of the brush, it can easily slide in the corner of the eye to make up the eyelashes, without burrs around the corner of the eye. The sides of the brush, which comprise longer hairs, and therefore more flexible, than the faces, but no less wide, allow a very effective combing and separation of the lashes. The back of the brush, exactly the same as the hole, allows to extend the makeup product or treatment taking over the tab over a large part of the length of the eyelash. When this dome is domed, it favors the curvature of the flange. The very accented and clearly different characteristics of the faces and sides give this brush a surprising dynamic behavior: when the user rotates the brush between his fingers, the eyelashes are alternately loaded and coated and then combed with unusual intensity. Preferably, the core is central with respect to each cross section. According to a first variation of the invention, it can be provided that the cross section has at least two sides along the axis of greatest length (Z-Z), these sides being substantially parallel to the axis (Z-Z). According to a second variant of the invention, it can be provided that the cross section has at least two sides along the axis of greatest length (Z-Z), these sides being convex in shape. According to this variant, it can be foreseen that the sides of the cross section have two excrements, the width of the section being according to the axis (Y-Y), perpendicular to the axis of greater length (Z-Z), in these ends substantially zero. Whatever the variant of the invention, it is preferred that the cross section has at least two sides along the axis (Y-Y), axis perpendicular to the axis of greatest length (Z-Z), these sides being convex in shape. Advantageously, the cross section has a maximum width (D) according to the axis of greatest length (Z-Z) and a maximum width (d) along the axis (Y-Y), verifying D and d the relation: D > l, 5d Even more preferably, D and d verify the relationship: D > 2d The greater length D may vary throughout the soul. In order to accentuate the makeup characteristics described above, brushes are preferred whose wraparound surface has an elongated cross section of at least 50% and preferably 75% of its length. Advantageously, the brushes according to the invention are provided in such a way that for each transversal section, the axis of greater length and the axis of greater width are perpendicular. For greater ease of handling, it is preferably provided that the ends of the core are aligned on the X-X axis. Another object of the invention is a method for manufacturing a brush as described above, characterized in that it comprises the following steps: (i) producing a starting brush comprising a straight rod defining a main axis (XX), a flexible core , which defines the length of the brush, this core comprising first and second limbs, the first end being fixedly attached to this rod, the core being straight and within the alignment of the rod, hairs being radially implanted in this core, defining the end of the hairs a wrapping surface of the starting brush; (ii) cutting the bristles of the starting brush so that the wrapping surface of the brush has at least a part of its length, a cross section of elongated shape along a longer axis (Z-Z); (iii) print to the core a principal torsion in the plane perpendicular to the axis of greatest length (Z-Z) and passing through the rod. Preferably in a fourth step: (iv) a secondary torsion is printed on the end of the core which is fixedly attached to the rod in order to align the second end of the core on the main axis (X-X). Preferably, proceeds in steps (i) and (ii) so that the core is central relative to the faces of the straight cut brush. Preferably, the starting brush is cut so that the wrapping surface has an elongated cross section of at least 50% and preferably over 75% of its length. According to a preferred embodiment of the invention, step (iii) is carried out in order to impart to the core a substantially circular main torsion. Furthermore, the bristles of the brushes according to the invention can be of any species: hairs of different lengths, of different diameters or of different sections and of different materials, hairs of sharp ends, in the form of a fork or of a pin head, or which has experienced all kinds of treatments known to the person skilled in the art. It can also be envisaged that the brush according to the invention comprises an alternation of rows of short hairs and long hairs, the long hairs being the only ones taken into account to define the wrapping surface of the brush. Such a variant of the invention makes it possible to accentuate the product loading of the flange by the brush of the invention. The helical winding of the two branches of the metal wire forming the core can be provided with a step to the right, as usually envisaged in the manufacture of make-up brushes, or with a step to the left as taught by the application for patent FR-A-2701198. To make a step brush to the left, the branches of the soul twist by turning to the left to form turns that rotate clockwise around the soul as it progresses from the rod to the end of the brush. The subject of the invention is also a makeup device comprising a mask reservoir and a mask application member as described above. Because of its particular shape, when the brush passes through a drainer, its sides are very well drained, while their faces are less drained. In particular, the faces slip in a non-symmetrical way due to their curvature. This particularity allows the user, using one or another of the faces, to perform a variable makeup on load and intensity over the entire length of the eyelid. You can adjust the flexibility of the hairs and the flexibility of the soul to favor or limit the runoff of the brush. In order to better understand the object of the invention, several brushes corresponding to the characteristics of this invention are described below, by way of example.

Figures 1, IA and 2A are perspective views of brushes that can be used to make a brush according to the invention. Figures IB and 2B are perspective views of brushes respectively according to ia and 2A that have been cut according to step (ii) of the method according to the invention. Figures IC and 2C are sections according to the IC-IC and IIC-IIC planes of the brushes shown respectively in Figures IB and 2B. The figures ID, 1E and 2D are perspective views of brushes according to the invention made following the process according to the invention, respectively from the brushes shown in FIGS. A and 2A. Figure 1E is the result of the figure ID by a 90 ° rotation about the X-X axis. Figure 3 is a sectional view of a device for eye makeup. The brush 100 shown in FIGS. 1 and 1A comprises a straight rod 101 defining a main axis X-X. At the end 101.1 of this rod 101, a web 102 (which is shown in the figures, even though it is inside the brush), is fixed by pressure connection, formed by a helical winding of two branches of a metallic wire. 103 that has been bent into a U before the branches twist. The axis of the core 102 is confused with the main axis X-X. The hairs 104 are radially implanted between the branches of the yarn 103. When the branches of the yarn 103 are twisted, the hairs are tightened and held between the propeller turns of the core 102. The ends of the hairs 104 define the surface 105 of the yarn. brush: it is a surface of convex revolution that has the shape of a rugby ball and whose extremities are constituted by two straight sections: disc 106.a, center 108.a and disc 106. b center 108. b. With the help of a razor to cut the hair, two parallel faces are cut flat on the brush of Figure A over almost the entire length (measured along the X-X axis) of the brush. The intersection (?) Of the surface 105 of the brush with the cutting plane is shown in FIG. A cut brush is obtained represented in figures IB and IC. For the elements of Figures IB and IC common with Figure IA, the references of Figures IB and IC are the same as those of Figure IA added by 10. The brush shown in Figures IB and IC comprises two parallel faces. between them and parallel to axis XX. These two faces are equidistant from the soul 112. The distance between the two faces is d. The two faces are joined by the rounded edges 120. In the area where the faces 119 have been cut, the sections of the brush that follow a plane perpendicular to XX are constituted by curves 115c, represented in Figure IC, substantially rectangular, great length D following the axis of greater length ZZ and greater width d measured according to the axis of greater width YY with D > l, 5d. The two faces do not extend to the ends 117a and 117b of the brush. In these extremities, the sections 116a, 116b of the brush are circular. The curve 115c is symmetrical with respect to the axes of greater length Z-Z and greater width Y-Y. The core 112 is printed, with the aid of an appropriate tool, for example by longitudinally tightening it around a metal cylinder, a first twist in the plane perpendicular to the faces 119, between sections 116.a and 116.b, in such a way that the soul has a shape substantially in an arc of a circle, then a second twist, in the same plane, between the tip 111.1 of the rod and the center 118.a of the section of the end of the brush, to align the center 118. b at the other end of the brush on the main axis XX as the first end 118.a. By this operation a brush 120 according to the invention shown in the figures ID and 1E is obtained. In these figures, the references assigned to elements analogous to those of figures IB and IC are those of figures IB and IC increased by 10.

The brush of figures ID and 1E is substantially in the form of an elongated spoon; the core 122 describes a curve Cl, substantially in the arc of a circle. However, its extremities 128.a and 128.b are aligned on the main axis X-X. The brush comprises two faces 129a, 129b forming a 129a on the back and the other 129b, the hollow of the spoon. These two faces are connected by rounded edges 120. The surface 125 of the brush is formed by a series of curves 115c, such as those shown in Figure IC, which evolve along the core 122; these curves are substantially rectangular, with axes of greater length (Z-Z) parallel to each other. At its ends 127a, 127b, the brush is formed by circular curves. Figure 2A is distinguished from Figure IA by the fact that the surface 205 of the cut starting brush has the shape of a truncated cone. With the help of a hair clipper, two rounded, secant faces are cut out in the brush of Figure 2A over the entire length (measured along the X-X axis) of the brush. A cut brush is obtained shown in Figures 2B and 2C. For the elements of Figures 2B and 2C common with Figure 2A, the references of Figures 2B and 2C are the same as those of Figure 2A increased by 10.

The brush shown in Figures 2B and 2C comprises two rounded and secant faces 219. These two faces are symmetrical with respect to the soul 212. The distance between the vertices of the two faces is d. d is sensibly constant from one end of the brush to the other. The two faces are connected by edges 220 ending at edges 220a. The sections of the brush following a plane perpendicular to XX are constituted by curves 215c, represented in figure 2C, which have substantially the shape of an eye, of great length D following the axis of greater length ZZ and greater width d measured following the axis of greater width YY. D grows from a first limb 216b to a second limb 216a with D > 2d on the curve 215c shown on FIG. 2C. The two cut faces extend to the sections of the limbs 216a and 216b of the brush. The curve 215c is symmetrical with respect to the axes of greater length Z-Z and greater width Y-Y. The core 212 is printed, with the aid of an appropriate tool, for example by longitudinally tightening it around a metal cylinder, a first twist in the plane perpendicular to the faces 219, between the sections 216.a and 216.b, in such a way that the Soul has a shape substantially in arc of circle, then a second twist, in the same plane, between the tip 211.1 of the rod and the center 218.a of the section of the tip of the brush, to align the center 218.b at the other end of the brush on the main axis XX as the first end 218.a. With this operation, a brush 200 according to the invention shown in Figure 2D is obtained. In this figure, the references assigned to elements analogous to those of FIGS. 2B and 2C are those of FIGS. 2B and 2C enlarged in FIGS.

. The brush of figure 2D has the shape of an elongated spoon; the web 222 describes a curve C2, substantially in the arc of a circle. However, its ends 228.a and 228.b are aligned on the main axis X-X. The surface 225 of the brush comprises two faces 229a, 229b, forming one: 229a, the back, and the other: 229b, the hollow of the spoon. These two faces are connected by an edge 230a. The surface 225 of the brush is formed by a series of curves 215c, such as those shown in Figure 2C, evolving along the web 222; these curves are substantially the shape of an eye, with longer axes (Z-Z) parallel to each other. In the two embodiments of the invention described above, starting brushes having the shape of a rugby ball and a frustoconical shape have been used, but a starting brush having a shape chosen from among a cylinder can also be used. a double cone joined by the bases of the two cones of identical size, a fish as described for example in the French patent application published under the number FR-A-2730910, a peanut, a shell, a tear. The device for eye makeup depicted in Figure 3 comprises a cylindrical reservoir 320, comprising a neck 324, threaded, topped by a sealing gasket 325 and filled with a mask 315. The tank 320 comprises in its neck a drainer 321, the maintenance of the squeegee inside the neck being ensured thanks to a ring 326 which cooperates with the landing separating the neck of the tank 320 itself. The squeegee 321 is constituted, in a known manner, of a flexible and elastic material. An applicator is intended to cooperate with the reservoir 320. This applicator is constituted by a gripping means 323 supporting the applicator member 330, comprising a rod 322 and an applicator member 301, identical to those shown in FIGS. 2D The gripping means 323 is in the form of a cap and comprises a thread 323a which cooperates with the thread 324a of the tank neck. The tight seal of the tank 320 is obtained by screwing the gripping means 323 on the neck 324 of the tank provided with its gasket 325. When the application member of the tank 330 is removed, the applicator member having the shape of a mask loaded brush it passes through the drainer 321. This drains the hairs from the back of the brush more importantly than the hairs of the brush hollow. The hairs on the sides of the brush are very drained. When applying on the eyelashes, the brush loads the product flanges on both sides, then extends the product, lengthens and curves the flange on its back and sides, combs on its sides. Being the hairs on the sides very long in relation to the rest of the hairs of the brush and being the comb of small thickness, the eyelashes are very well taken into account in the course of combing which is very effective. With regard to the globally convex brushes known from the prior art, the brush according to the invention offers the advantage of being very easy to use, of making up the integrity of the hairs of the eyelids without burrs, of allowing a very long, very curved makeup and very separate. It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention. Having described the invention as above, property is claimed as contained in the following:

Claims (18)

1. Brush comprising a straight rod that defines a main axis (X-X); a flexible core (122; 222) defining the length of the brush, said core comprising a first and second end, the first end being fixedly attached to the rod; hairs implanted radially in this core, the end of the hairs defining a wrapping surface (125; 225) of the brush, this envelope surface having first and second ends, characterized in that the core describes a curve (C) in a plane of curvature (P) and in that the envelope surface (125; 225) of the brush has, over at least a part of its length, a cross section (115c; 215c) of elongated shape along an axis of greater length (ZZ) perpendicular to the curvature plane (2).

2. Brush according to the preceding claim, characterized in that the cross section (115. c) has at least two sides (119) along the axis of greatest length (Z-Z), these sides being substantially parallel to the axis (Z-Z).

3. Brush according to claim 1, characterized in that the cross section (215. c) has at least two sides (219) along the axis of greatest length (Z-Z), these sides being convex.

4. Brush according to claim 3, characterized in that the sides (219) of the cross section (215. c) have two ends (220a), the width of the section (215. c) being along the axis (YY), perpendicular to the axis of greater length (ZZ), in these extremities noticeably null.

5. Brush according to any one of the preceding claims, characterized in that the cross section (115. c; 215.c) has at least two sides (120; 220) along the axis (YY), axis perpendicular to the axis of greatest length (ZZ) , these sides being convex.

6. Brush according to any one of the preceding claims, characterized in that the cross section has a maximum width (D) along the axis of greatest length (Z-Z) and a maximum width (d) along the axis (Y-Y), verifying D and d the relation: D > l, 5d

7. Brush according to the preceding claim, characterized in that D and d verify the relation: D > 2d

8. Brush according to any one of the preceding claims, characterized in that its wraparound surface has an elongated cross section over at least 50% of its length.

9. Brush according to the preceding claim, characterized in that its envelope surface has an elongated section on at least 75% of its length.

10. Brush according to any one of the preceding claims, characterized in that the cross section of the enclosing surface (125) is substantially in a circular arc at the ends (127a; 127b) of this enclosing surface.

11. Brush according to any one of the preceding claims, characterized in that the curve (^, C2) is substantially circular.

12. Brush according to any one of the preceding claims, characterized in that the ends (128a, 128b, 228a, 228b) of the core (122; 222) are aligned on the axis (X-X).

13. Method of manufacturing a brush according to any one of the preceding claims, characterized in that it comprises the following steps: (i) making a starting brush comprising a straight rod (101; 201) defining a main axis (XX), a core (102, 202) flexible, which defines the length of the brush, this core comprising a first and a second end, the first end being fixedly attached to this rod, the core being straight and within the alignment of the rod, being implanted hairs (104; 204) radially in this core, the end of the hairs defining a wrapping surface (105; 205) of the starting brush; (ii) cutting the bristles of the starting brush so that the surrounding surface (115, 215) of the brush has at least a part of its length, a cross section (115c, 215c) of elongated shape along an axis of greater length (ZZ); (iii) print to the core a principal torsion in the plane perpendicular to the axis of greatest length (Z-Z) and passing through the rod.

14. Process according to the preceding claim, characterized in that it comprises a fourth step: (iv) printing a secondary torsion to the end of the core that is fixedly attached to the rod in order to align the second end (118b; 218b) of the core on the main axis (XX).

15. Method according to any of claims 13 and 14, characterized in that the envelope surface (105; 205) of the starting brush is of revolution.

16. Method according to any one of claims 13 to 15, characterized in that the envelope surface (105; 205) of the starting brush is chosen from: u? cylinder, a cone fragment, a rugby ball, a buoy, a fish, a peanut, a shell, a tear.

17. Method according to any of claims 13 to 16 characterized in that the surface (105; 205) of the starting brush is convex.

18. Make-up device comprising a mask reservoir (320) and an application member (330) of the mask, characterized in that the application member is according to any one of claims 1 to 12.