| 摘要 |
Level (i.e., uniform diameter along the length thereof) and tapered (varying diameter along the length thereof) brush bristles include a central core having an outer wall and a pair of internal, semi-cylindrical passages separated by a central dividing wall. A plurality of spokes, or ribs, extend radially outwardly from the outer wall of the central core in planes other than the plane of the central dividing wall and also are spaced equidistant from each other about the circumference of the outer wall. Applicator brushes employing the aforementioned bristles also form a part of this invention.
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