Brush for applying a cosmetic product and make-up device comprising it

DETAILED DESCRIPTION It has therefore become desirable to have use of brushes that allow the eyelashes to be engaged fully by the brush in order to spread out the product correctly and separate the lashes properly.
Another object of the invention is to provide a brush which is still simple and economical to apply and practical to use.
The present invention is based on the discovery of novel brushes for applying a cosmetic product which, when used to apply mascara to the eyelashes, make it possible to obtain a make-up effect with a great deal of curling and lengthening and with a product spread out along the entire length of the lash.
These brushes are, moreover, very easy to handle and allow make-up to be applied with ease to the corner of the eye.
An object of the invention is to provide a brush comprising a straight wand defining a major axis (X--X); a flexible core which defines the length of the brush, this core comprising a first end and a second end, the first end being secured to the wand; a plurality of bristles inserted radially into this core, the end of the bristles defining an envelope surface of the brush, this envelope surface having a first end and a second end, the brush being characterized in that the core describes a curve (C) in a plane of curvature (P) and in that the envelope surface of the brush over at least part of its length has a cross section of elongate shape in the direction of an axis of greatest length (Z--Z) perpendicular to the plane of curvature (P).
The cross-section of the envelope surface is intended to mean a section through the envelope surface on a plane perpendicular to the core.
Preferably the curve (C) is more or less circular.
That part of the brush which is in the concave part f the curve (C) forms a hollow.
That part of the brush which is on the opposite side forms the back of the brush.
As the cross-sections of the envelope surface of the brush are elongate, in the direction of the axis of greatest length, in the direction perpendicular to the plane (P) of twisting of the core, the brush according to the invention has two broad flattened faces, one being in the hollow of the brush and the other in the back of the brush