Applicator for a cosmetic product, in particularly mascara, and method of manufacturing such an applicator

Patent metadata

Field	Value
Publication number	US-9468281-B2
Application number	US-201514667047-A
Country	US
Kind code	B2
Filing date	Mar 24, 2015
Priority date	Mar 25, 2014
Publication date	Oct 18, 2016
Grant date	Oct 18, 2016

Abstract

An applicator for a cosmetic product, in particular mascara, comprises a twisted core and fibres that extend from the core being held by the core, the core having a distal end and a proximal end, the fibres forming an envelope (E) with their free end, characterised in that the envelope (E) has curved faces (F 1 -F 4 ) with at least one slope, or inclination, from the distal end to the proximal end, the slope or inclination changing direction from one face (F 1, F 3 ) to the other (F 2, F 4 ) so that the envelope (E) has hollows alternating with raised parts around the core.

First claim

We claim:

1. Applicator for a cosmetic product, in particular mascara, comprising a twisted core and fibres that extend from the core being held by said core, said core having a distal end and a proximal end, said fibres forming an envelope (E) with their free end, characterised in that said envelope (E) has curved faces (F 1 -F 4 ) with at least one slope, or inclination, from said distal end to said proximal end, said slope or inclination changing direction from one face (F 1 , F 3 ) to the other (F 2 , F 4 ) so that said envelope (E) has hollows alternating with raised parts around said core.

2. Applicator according to claim 1 , wherein said faces (F 1 -F 4 ) are delimited by unconnected lateral edges.

3. Applicator according to claim 2 , wherein the direction of said slope, or inclination, is inverted alternately around said core, from one face (F 1 , F 3 ) to the other (F 2 , F 4 ).

4. Applicator according to claim 2 , wherein the core has a region situated between its distal end and its proximal end, known as the intermediate region, which in particular is substantially equidistant from said distal and proximal ends, the envelope (E) comprising a pair of curved faces (F 1 , F 3 ) that have a concave undulation from the distal end to said intermediate region and a convex undulation from said intermediate region to the proximal end, and a pair of curved faces (F 2 , F 4 ) that have a convex undulation from the distal end to said intermediate region and a concave undulation from said intermediate region to the proximal end.

5. Applicator according to claim 1 , wherein the direction of said slope, or inclination, is inverted alternately around said core, from one face (F 1 , F 3 ) to the other (F 2 , F 4 ).

6. Applicator according to claim 5 , wherein the core has a region situated between its distal end and its proximal end, known as the intermediate region, which in particular is substantially equidistant from said distal and proximal ends, the envelope (E) comprising a pair of curved faces (F 1 , F 3 ) that have a concave undulation from the distal end to said intermediate region and a convex undulation from said intermediate region to the proximal end, and a pair of curved faces (F 2 , F 4 ) that have a convex undulation from the distal end to said intermediate region and a concave undulation from said intermediate region to the proximal end.

7. Applicator according to claim 1 , wherein the envelope (E) comprises a pair of curved faces (F 2 , F 4 ) which are substantially convex from the distal end to the proximal end of the core, and a pair of curved faces (F 1 , F 3 ) which are substantially concave from the distal end to the proximal end of the core.

8. Applicator according to claim 1 , wherein the core has a region situated between its distal end and its proximal end, known as the intermediate region, which in particular is substantially equidistant from said distal and proximal ends, the envelope (E) comprising a pair of curved faces (F 1 , F 3 ) that have a concave undulation from the distal end to said intermediate region and a convex undulation from said intermediate region to the proximal end, and a pair of curved faces (F 2 , F 4 ) that have a convex undulation from the distal end to said intermediate region and a concave undulation from said intermediate region to the proximal end.

9. Applicator according to claim 1 , wherein each of the curved faces (F 1 -F 4 ) is generated by a straight line, known as the generatrix line, said generatrix line being orthogonal to the core and orthogonal to the plane of symmetry of said face (F 1 -F 4 ).

10. Applicator according to claim 1 , wherein the envelope (E) has a transverse cross-section in a plane substantially orthogonal to the core, the shape of which is a polygon, along the entire length of said core, from said distal end to said proximal end.

11. Applicator according to claim 10 , wherein said shape is a quadrilateral.

12. Applicator according to claim 1 , wherein said envelope (E) has chamfers on all or part of its faces (F 1 -F 4 ), at the distal end of said core.

13. Applicator according to claim 12 , wherein said envelope (E) comprises at least two opposed faces (F 1 , F 3 ) with chamfers symmetrical in relation to said core.

14. Applicator according to claim 1 , wherein said envelope (E) is a helical envelope.

15. Method for manufacturing an applicator for a cosmetic product, in particular mascara, said method comprising:
a step of positioning a plurality of fibres between longitudinal portions of a spindle, then
a first step of twisting said spindle in order to form a twisted spindle with fibres extending radially around it, the ends of said fibres forming a cylindrical envelope extending in a longitudinal direction of extension around said spindle, then
a step of cutting the fibres, so that said fibres form an envelope (E) with their free end, said envelope (E) having curved faces (F 1 -F 4 ) with at least one slope, or inclination, from said distal end to said proximal end, said slope or inclination changing direction from one face (F 1 , F 3 ) to the other (F 2 , F 4 ) so that said envelope (E) has hollows alternating with raised parts around said core.

16. Applicator for a cosmetic product, in particular mascara, obtained by the method according to the claim 15 .

17. Container for a cosmetic product, in particular mascara, capable of containing an applicator according to claim 1 .

Assignees

• Albea Services

Inventors

• Schreiber Camille
• Rutigliano Anne
• Lhoyer Patrick

Classifications

• A46B9/028

  Bristle profile, the end of the bristle defining a surface other than a single plane or deviating from a simple geometric form, e.g. cylinder, sphere or cone · CPC title

• A46B9/02

  Position or arrangement of bristles in relation to surface of the brush body, e.g. inclined, in rows, in groups · CPC title

• A46B9/026

  where the surface of the brush body or carrier is not in one plane, e.g. not flat (A46B9/005 takes precedence) · CPC title

• A45D40/26

  Appliances specially adapted for applying pasty paint, e.g. using roller, using a ball · CPC title

• A46D3/05

  for fixing the bristles between wires, tapes, or the like · CPC title