Brush for applying a product to the eyelashes and/or eyebrows

1. A brush configured for applying a product to the eyelashes and/or eyebrows, comprising:

a core extending along a longitudinal axis of the brush, comprising a portion of the core carrying bristles that have a proximal end intended to be fixed to a stem and a distal end, the portion of the core carrying the bristles having a rectilinear proximal portion that extends along more than or equal to ⅔ of the length of the portion of the core carrying the bristles from the proximal end of the portion of the core carrying the bristles, and having at least one bend made at the distal end of the portion of the core carrying the bristles, and

bristles held by the core, the bristles having free ends that define an envelope surface, the envelope surface having at least one cutout, wherein the cutout has a longitudinal axis that is parallel to the longitudinal axis of the brush,

wherein the proximal rectilinear portion and a distal rectilinear portion of the core form an angle of between 20° and 30°, between one another,

wherein the cutout has, in cross section, a flat bottom or a bottom that is convex towards in a direction towards an outside of the brush;

wherein the cutout has a width w, measured at a bottom of the cutout, that is constant along at least a portion of its length; and

wherein the cutout comprises connected sidewalls and a bottom wall, each wall being formed by the bristles.

2. The brush according to claim 1 , wherein the portion of the core carrying the bristles comprises a rectilinear distal portion made between the bend and the distal end of the core.

3. The brush according to claim 1 , wherein the rectilinear proximal portion, made between the bend and the proximal end of the portion of the core carrying the bristles, extends along a length L p , of between ⅔ L and 11/12 L, where L denotes the length of the portion of the core carrying the bristles.

4. The brush according to claim 1 , wherein the bend is made in a plane containing the longitudinal axis of the core, the envelope surface comprising a cutout, the axis of which extends in said plane.

5. The brush according to claim 1 , wherein the cutout has, in cross section, a flat bottom or a bottom that is convex towards in a direction towards an outside of the brush.

6. The brush according to claim 1 , wherein the bottom of the cutout has, in longitudinal section, a profile that is concave towards in a direction towards an outside of the brush.

7. The brush according to claim 1 , wherein the envelope surface S has a plurality of cutouts.

8. The brush according to claim 7 , wherein the cutouts are distributed evenly around the core.

9. The brush according to claim 1 , wherein the brush is chamfered at its distal and proximal ends.

10. The brush according to claim 1 , wherein the core is fixed by its proximal end to a stem.

11. A packaging and application device comprising a container containing a product to be applied and a brush according to claim 1 .

12. The brush according to claim 1 , wherein the cutout has a length L 2 , where L 2 ≥L/2, where L is the length of the portion of the brush carrying the bristles.

13. The brush according to claim 1 , wherein the cutout has a width w, measured at a bottom of the cutout, that is constant along at least a portion of its length.

14. The brush according to claim 1 , wherein the cutout has a width, measured at a bottom of the cutout, that is between 1 mm and 4 mm.

15. The brush according to claim 1 , wherein a bottom of the cutout is spaced apart from the core.

16. The brush according to claim 1 , wherein the cutout is at a distance from the longitudinal axis of the core, said distance being variable along the length of the cutout.

17. The brush according to claim 1 , wherein the cutout comprises connected sidewalls and a bottom wall, each wall being formed by the bristles.

18. A method for manufacturing a brush according to claim 1 , comprising the following steps of:

producing a brush blank having a rectilinear core,

cutting the bristles so as to form one or more cutouts, and then

bending the core.

19. The method according to claim 18 , wherein the envelope surface of the blank, after cutting and before the core has been bent, has a shape other than a cylinder of revolution.

20. A brush configured for applying a product to the eyelashes and/or eyebrows, comprising:

a core extending along a longitudinal axis of the brush, comprising a portion of the core carrying bristles that have a proximal end intended to be fixed to a stem and a distal end, the portion of the core carrying the bristles having a rectilinear proximal portion that extends along more than or equal to ⅔ of the length of the portion of the core carrying the bristles from the proximal end of the portion of the core carrying the bristles, and having at least one bend made at the distal end of the portion of the core carrying the bristles, and

bristles held by the core, the bristles having free ends that define an envelope surface, the envelope surface having at least one cutout, wherein the cutout has a longitudinal axis that is parallel to the longitudinal axis of the brush and wherein the cutout is bordered by stiff flanks.

21. A method for applying a product to the eyelashes and/or eyebrows, the method comprising placing a brush of claim 1 or claim 20 head-on with respect to a face and applying the product on the eyebrows and/or eyelashes.