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    • 2. 发明授权
    • Document handler vacuum belt platen transport system
    • 文件处理机真空带压板输送系统
    • US4825255A
    • 1989-04-25
    • US155350
    • 1988-02-12
    • Thomas C. Iaia, Jr.William J. McLaughlinRobert P. Siegel
    • Thomas C. Iaia, Jr.William J. McLaughlinRobert P. Siegel
    • G03B27/64G03G15/00
    • G03G15/60G03B27/64G03G2215/00185
    • A document handler 20 for presenting documents to the platen 23 of a copier 10 for copying with a vacuum belt platen transport system 23 having plural unapertured, thin, low-frictional, document transporting belts 35 with substantial exposed spaced 35a between the edges of the belts, the belts being movable under a substantially planar vacuum plenum backing and imaging background surface 33a overlying the platen, and a vacuum system 33 for applying a partial vacuum to a document sheet being transported by the movable belts; wherein the vacuum plenum surface 33a has multiple vacuum apertures 53 located under and overlaid by the edges of the belts 35, the belts extending in rows under the belt edges across the surface, but not extending into the exposed spaces between the belts. The belts are opaque and white and optically conceal the overlaid vacuum apertures 53. The surface also has multiple vacuum grooves 54 extending transversely in closely spaced parallel rows across the exposed spaces between the edges of adjacent belts but not passing under the belts. The vacuum grooves connect with the vacuum apertures for applying a partial vacuum to a document on the belts in the exposed spaces between the belts, but not applying a partial vacuum under the belts except at the outer edges, so that the belts are substantially riding on ungrooved and unapertured and non-vacuum areas of the vacuum plenum surface to substantially reduce frictional drag between said belts and this surface. Additional vacuum channeling 58 may be provided along a registration edge for additional vacuum holding force together with a vacuum edge seal 72 overlayed by the document edge.
    • 用于将文件呈现到复印机10的压板23上用于复印的文件处理器20,该真空带压板输送系统23具有多个未被打印的,薄的,低摩擦的文档传送带35,其带之间具有大致暴露的间隔开的35a 所述带可在基本上平面的真空增压背衬和覆盖所述压板的成像背景表面33a上移动;以及真空系统33,用于将部分真空施加到由所述可移动带传送的文件片; 其中真空压力室表面33a具有位于带35的边缘下方并由其覆盖的多个真空孔53,该带在带边缘下方的行中延伸穿过表面,但不延伸到带之间的暴露空间中。 皮带是不透明和白色的,并且光学地隐藏重叠的真空孔53.表面还具有多个真空槽54,该真空槽54在紧邻的带的边缘之间的暴露的空间中以紧密间隔开的平行排横向延伸,但不通过皮带下方。 真空槽与真空孔连接,用于将部分真空施加到带之间的暴露空间中的带上的文件上,但是除了外边缘之外不在皮带外部施加部分真空,使得带基本上骑在 非压缩和非真空区域,以显着减少所述带和该表面之间的摩擦阻力。 可以沿着配准边缘提供额外的真空通道58,用于附加的真空保持力以及由文件边缘覆盖的真空边缘密封件72。