Cosmetic product applicator including helical furrows and cosmetic item including such an applicator

Abstract

A cosmetic product applicator including a straight stick extending according to a main axis with a longitudinal direction, the stick including an external surface over which furrows are formed. Over at least one longitudinal portion of the stick, the external surface of the stick includes at least two helical furrows, one of the two furrows having a right-hand pitch and the other one having a left-hand pitch, the furrows meeting several times over the longitudinal portion of the stick, such an applicator having furrows with opposite pitches improving combing and separating of the eyelashes (or other hairs) when applying a cosmetic product. The presence of furrows having opposite pitches allows for an efficient use of the applicator both with the right hand and with the left hand, with an identical or similar make-up quality. The applicator is well-suited to be used in a “mascara pen” type mascara item.

1 - 18 . (canceled) 
     
     
         19 . A cosmetic product applicator comprising:
 a straight stick extending according to a main axis with a longitudinal direction;   the stick including an external surface over which furrows are formed;   the stick beings cylindrical and straight; and   over at least one longitudinal portion of the stick the external surface of the stick includes at least two helical furrows;   a first of said two furrows having a right-hand pitch, and a second of said furrows having a left-hand pitch;   the furrows meeting several times over said longitudinal portion of the stick, each furrow forming an angle comprised between 88° and 50° with respect to the main axis.   
     
     
         20 . The cosmetic product applicator according to  claim 19 , further comprising:
 exactly two, three, four, five, or six furrows.   
     
     
         21 . The cosmetic product applicator according to  claim 19 , wherein:
 each furrow forms an angle comprised between 85° and 67° with respect to the main axis.   
     
     
         22 . The cosmetic product applicator according to  claim 19 , wherein:
 each furrow forms an angle comprised between 85° and 82° with respect to the main axis.   
     
     
         23 . The cosmetic product applicator according to  claim 19 , wherein:
 the stick is axisymmetrically cylindrical and has a diameter comprised between 2 mm and 8 mm.   
     
     
         24 . The cosmetic product applicator according to  claim 19 , wherein:
 the stick is axisymmetrically cylindrical and has a diameter comprised in the range of 3 mm.   
     
     
         25 . The cosmetic product applicator according to  claim 19 , wherein:
 at least one furrow has a variable pitch.   
     
     
         26 . The cosmetic product applicator according to  claim 19 , wherein:
 wherein the helical furrows extend in a rectilinear manner over a helix.   
     
     
         27 . The cosmetic product applicator according to  claim 19 , wherein:
 at least one helical furrow extends according to a sinusoidal trajectory, undulating around a helix.   
     
     
         28 . The cosmetic product applicator according to  claim 19 , wherein:
 each furrow has a width, at the surface of the stick, comprised between 0.1 mm and 1 mm.   
     
     
         29 . The cosmetic product applicator according to  claim 19 , wherein:
 each furrow has a width, at the surface of the stick, comprised between 0.3 mm and 0.8 mm.   
     
     
         30 . The cosmetic product applicator according to  claim 19 , wherein:
 each furrow has a depth comprised between 0.1 mm and 1 mm.   
     
     
         31 . The cosmetic product applicator according to  claim 19 , wherein:
 each furrow has a depth comprised between 0.3 mm and 0.8 mm.   
     
     
         32 . The cosmetic product applicator according to  claim 19 , wherein:
 the furrows have a triangular, square, rectangular, flared, or rounded cross-section.   
     
     
         33 . The cosmetic product applicator according to  claim 19 , wherein:
 the furrows have a semi-circular cross-section.   
     
     
         34 . The cosmetic product applicator according to  claim 19 , wherein:
 the furrows have a cross-section that includes a bottom having a restricted section forming a cavity with a restricted section which extends along the furrow.   
     
     
         35 . The cosmetic product applicator according to  claim 19 , wherein:
 the furrows have a cross-section that includes a bottom having an edge which extends along the furrow.   
     
     
         36 . The cosmetic product applicator according to  claim 19 , further comprising:
 at least one striation formed at the surface of the stick, the at least one striation being longitudinal or helical with a pitch greater than or equal to that of the furrows.   
     
     
         37 . The cosmetic product applicator according to  claim 36 , further comprising:
 exactly one, two, three, or four striations.   
     
     
         38 . The cosmetic product applicator according to  claim 36 , wherein:
 each striation has a cross-section whose surface area is comprised between one fifth and half the surface area of the cross-section of each furrow.   
     
     
         39 . The cosmetic product applicator according to  claim 19 , wherein:
 the applicator includes a longitudinal portion with a smooth end.   
     
     
         40 . A cosmetic item comprising:
 a reservoir containing a liquid or semi-liquid cosmetic product;   a guide tube extending according to the longitudinal direction in said reservoir; and   an applicator according to  claim 19  mounted movable in longitudinal translation in said guide tube between a retracted position in which the applicator is entirely or partially contained in the guide tube and a deployed position in which a portion of the applicator that is contained in the guide tube in the retracted position projects from one end of the guide tube, the stick having an end longitudinal portion having a constant and identical cross-section, within a functional clearance margin, to the cross-section of the guide tube, the guide tube including at least one aperture enabling the passage of the cosmetic product from the reservoir towards the applicator.   
     
     
         41 . The cosmetic product applicator according to  claim 19 , wherein:
 said applicator being made of metal, plastic, ceramic, Bakelite, glass, or paper.