US Patent 7895698 Applicator brush

An applicator brush for applying a material to a surface is provided having a brush head of a width X arranged along a central axis. The brush head includes a first set of bristles having proximal base ends attached to a ferrule and distal ends defining a first edge situated in a substantially straight first plane perpendicular to the central axis. The first set of bristles have a first width Y, wherein Y<X. A second set of bristles is provided having proximal ends attached to the ferrule and distal ends defining a second edge situated in a second plane having a second width (X-Y). A length of each bristle in the first and second sets is defined as a distance between its proximal attachment point and its distal end.