IP Library › Granted Patent US 6,957,654
Granted Patent B2
US 6,957,654 · App. 10/134,829 · Granted Oct 25, 2005

Mascara brush with dual lumen bristle fibers

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Quick Facts
Patent No.
US 6,957,654
App. No.
10/134,829
Granted
Oct 25, 2005
Kind
B2
Abstract

An improve mascara brush has a typical twisted wire core containing bristles having a double lumen cross-section. The bristles are generally circular in shape, and hollow, with a dividing web across the midpoint of the bristle, thereby defining two longitudinal lumens extending along the length of the bristle. In other embodiments, the bristle is oval, square, rectangular or another polygonal shape.

Claims (4)

1. A brush for applying mascara to eyelashes, comprising:

a twisted wire core holding a plurality of radially extending nylon bristles to form a brush at an end of the core, said bristles being substantially hollow and having a longitudinal web dividing an interior of said bristles into two longitudinal lumens, said longitudinal lumens extending through at least a substantial portion of said bristles; and said bristles have a diameter of between about 0.004 inch to about 0.0099 inch and a durometer of about 92 Shore D to about 120 Rockwell R and a bristle density of between about 10 to about 40 bristles per turn.

2. A brush in accordance with claim 1 , wherein said bristles have a diameter of between about 0.004 inch to about 0.006 inch.

3. A brush in accordance with claim 1 or 2 , wherein said bristles have a bristle density of between about 15 to about 30 bristles per turn.