Brush for applying a composition to the eyelashes or eyebrows

Abstract

A brush for applying a cosmetic composition (P) to the eyelashes and/or eyebrows, having a core, preferably made of plastics material, having a longitudinal axis (X), a plurality of rows of spikes disposed around the core and along the latter, where, for at least each of a number k of said rows, where k is greater than or equal to 2, at least three successive spikes in this row, of respective ranks p, p+1 and p+2, have elongation axes (Y) that make respective angles ap, ap+1 and ap+2 at their base with the longitudinal axis (X) of the core, where p is an integer between 1 and n−3, where n denotes the number of spikes in the row, at least two of the angles ap, ap+1 and ap+2 being different, at least one spike of the same rank p having a different orientation ap for at least two of these k rows.

1 . A brush for applying a cosmetic composition to the eyelashes and/or eyebrows, having:
 a core having a longitudinal axis,   a plurality of rows of spikes disposed around the core and along the latter, where, for at least each of a number k of said rows, where k is greater than or equal to 2, at least three successive spikes in this row, of respective ranks p, p+1 and p+2, have elongation axes that make respective angles a p , a p+1  and a p+2  at their base with the longitudinal axis of the core, where p is an integer between 1 and n−3, where n denotes the number of spikes in the row, at least two of the angles a p , a p+1  and a p+2  being different, at least one spike of the same rank p having a different orientation a p  for at least two of these k rows.   
     
     
         2 . The brush as claimed in  claim 1 , wherein, for at least two consecutive rows of spikes, at least a part of the spikes in one row crosses at least a part of the spikes in the other row, when the brush is viewed from the side, in a direction perpendicular to its longitudinal axis. 
     
     
         3 . The brush as claimed in  claim 1 , wherein the distances between the peaks of at least three consecutive spikes in at least one row are different. 
     
     
         4 . The brush as claimed in  claim 1 , wherein the rows are all parallel to the longitudinal axis of the core. 
     
     
         5 . The brush as claimed in  claim 1 , wherein the angles a p , a p+1  and a p+2  are all different, for at least E(n/2) different values of p, E denoting the entire part, n denoting the number of spikes in the row. 
     
     
         6 . The brush as claimed in  claim 1 , wherein, for at least two of the k rows, the number N f  of spikes oriented toward the front and the number N r  of spikes oriented toward the rear satisfies the relationship 0.3<N f /N r <2.5. 
     
     
         7 . The brush as claimed in  claim 1 , wherein, for at least two of the k rows, the number of successive spikes that are all oriented either toward the front or toward the rear is less than or equal to 6 for this row. 
     
     
         8 . The brush as claimed in  claim 1 , wherein the spacing at the base and/or at the peak of the spikes in at least two of the k rows is not constant. 
     
     
         9 . The brush as claimed in  claim 1 , wherein, for at least two of the k rows, the number N f  of spikes oriented toward the front and the number N r  of spikes oriented toward the rear satisfies the relationship N f /N r >1.1 or N r /N f >1.1. 
     
     
         10 . The brush as claimed in  claim 1 , wherein, when the brush is viewed from the side in a direction perpendicular to its longitudinal axis, at least a part of the spikes in one row crosses those in the adjacent row. 
     
     
         11 . The brush as claimed in  claim 1 , wherein, when the brush is viewed from the side in a direction perpendicular to its longitudinal axis, at least a part of the spikes in one row does not cross any spike in the adjacent row. 
     
     
         12 . The brush as claimed in  claim 1 , wherein the elongation axes of the spikes in at least two of the k rows are all contained in a single plane. 
     
     
         13 . The brush as claimed in  claim 1 , wherein, for at least two of the k rows the length of the spikes in the row varies. 
     
     
         14 . The brush as claimed in  claim 1 , wherein the longitudinal axis of the brush is rectilinear. 
     
     
         15 . The brush as claimed in  claim 1 , wherein, for at least two of the k rows the number of pairs of consecutive spikes in which the two spikes are both oriented toward the front or are both oriented toward the rear is less than or equal to 50% of the total number of pairs of consecutive spikes in the row. 
     
     
         16 . The brush as claimed in  claim 1 , wherein, for at least two of the k rows, the number of pairs of consecutive spikes in which the two spikes are oriented with opposite orientations toward the front and toward the rear, or vice versa, is less than or equal to 75% of the total number of pairs of consecutive spikes in the row. 
     
     
         17 . The brush as claimed in  claim 1 , wherein, for at least two of the k rows, the number n of spikes in the row is greater than or equal to 10. 
     
     
         18 . The brush as claimed in  claim 1 , wherein the number m of rows is between 6 and 20. 
     
     
         19 . The brush as claimed in  claim 1 , wherein, with f being the total number of spikes of the brush and q the total number of values of different orientations a p,y , the ratio q/f is greater than or equal to 50%, p being the rank within the row and y the number of the row. 
     
     
         20 . The brush as claimed in  claim 1 , wherein at least a part of the spikes have at least one edge. 
     
     
         21 . The brush as claimed in  claim 1 , wherein all of the spikes in at least two of the k rows have a flat face contained in a single plane for the row. 
     
     
         22 . The brush as claimed in  claim 1 , wherein, for at least two of the k rows, the distances between the peaks of consecutive spikes in one row are different for at least half of the pairs of consecutive spikes in this row. 
     
     
         23 . The brush as claimed in  claim 1 , wherein, for at least two of the k rows, the distances d i  and d i+1  between the peaks of three consecutive spikes of ranks i, i+1 and i+2 in a row satisfy d i < >d i+1 . 
     
     
         24 . The brush as claimed in  claim 1 , which has two rows of consecutive spikes with different configurations, the other rows of spikes being formed by the repetition of these two rows, with one alternating with the other around the longitudinal axis of the brush. 
     
     
         25 . The brush as claimed in  claim 1 , wherein the number of pairs of consecutive spikes within one row that have a width that, for the first spike in the pair, increases with respect to the preceding one and, for the second spike in the pair, decreases with respect to the preceding one, or, for the first spike in the pair, decreases with respect to the preceding one and, for the second spike in the pair, increases with respect to the preceding one, is greater than or equal to ⅓ of the total number of spikes in the row and less than or equal to ⅘. 
     
     
         26 . The brush as claimed in  claim 1 , wherein the orientations of the elongation axes of the spikes with respect to the longitudinal axis of the brush are between 70° and 110°. 
     
     
         27 . The brush as claimed in  claim 1 , wherein the standard deviation between the orientations a p  of the spikes within one row is between 5 and 15°. 
     
     
         28 . A device for packaging and applying a cosmetic composition to the eyelashes and/or eyebrows, having:
 a container containing the composition to be applied,   a brush as defined in  claim 1 .   
     
     
         29 . A method for cosmetically treating the eyelashes and/or eyebrows, involving applying a cosmetic composition to the eyelashes and/or eyebrows with the aid of a brush as claimed in  claim 1  or a device as claimed in  claim 28 .