公开(公告)号：US4903074A

公开(公告)日：1990-02-20

申请号：US336992

申请日：1989-04-12

申请人： William L. Lama ,  Robert P. Loce ,  Martin Pepe, Jr. ,  Eleanor Whitte ,  Robert P. Siegel ,  Antje B. Parker ,  Peter Watson

发明人： William L. Lama ,  Robert P. Loce ,  Martin Pepe, Jr. ,  Eleanor Whitte ,  Robert P. Siegel ,  Antje B. Parker ,  Peter Watson

IPC分类号： G03B27/62 ,  G03G15/00

CPC分类号： G03G15/60 ,  G03B27/625 ,  G03G2215/00185

摘要： A document feeder is provided for presenting documents to the platen of a copier for copying with a vacuum belt platen transport system having document transporting belts movable under a substantially planar vaccum plenum backing. Also included is a vacuum system for applying a partial vacuum to a document sheet being transported by the movable belts over the platen. Show-through and show-around problems are reduced by optically mtching the belts and the plenum backing. In the preferred embodiment, the background surface is slightly roughend and made to be approximately 92% reflective to light during image exposure. The belts are composed of a urethane material which is approximately 16% transmissive but provides a 91% reflectance when moving along the plenum surface.

摘要翻译： 提供了一种文件馈送器，用于将文件呈现在复印机的压板上，用于通过真空带压板输送系统进行复印，所述真空带压板输送系统具有可在基本上平面的真空充气背衬下移动的文档传 还包括真空系统，用于将部分真空施加到由可移动带在压板上传送的原稿上。 通过旋转皮带和充气背衬来减少显示和显示问题。 在优选实施例中，背景表面稍微变粗糙并且在图像曝光期间被制成大约92％的反射光。 皮带由氨基甲酸乙酯材料构成，其大约为16％透射性，但是当沿着气室表面移动时，它提供了91％的反射率。