| 摘要 |
PCT No. PCT/US95/12863 Sec. 371 Date Jul. 14, 1997 Sec. 102(e) Date Jul. 14, 1997 PCT Filed Oct. 18, 1995 PCT Pub. No. WO96/11771 PCT Pub. Date Apr. 25, 1990The roller and belt assembly for mounting on a spindle or drive shaft comprises a closed loop belt having an inner surface and an outer surface, the inner surface having an engaging material thereon, and the outer surface having an abrasive or bussing material thereon. The assembly further includes a cylindrical roller having an outer cylindrical surface, having a longitudinal axis and having a resilient, compressible material attached to and covering the outer cylindrical surface. Sliding and engaging structure is attached to the resilient, compressible material which, when the belt is rotated in the first direction, allows the belt to slidingly rotate around and about the longitudinal axis of the roller and, when the belt is rotated in a second direction, the sliding and engaging structure engages the engageable material on the inner surface of the belt and prevents the belt from rotating about the roller.
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