公开(公告)号：US06634637B2

公开(公告)日：2003-10-21

申请号：US09977259

申请日：2001-10-16

申请人： Yuma Yoshida ,  Yoshihiro Wago ,  Yasuhiro Iwamoto ,  Hideki Sendo

发明人： Yuma Yoshida ,  Yoshihiro Wago ,  Yasuhiro Iwamoto ,  Hideki Sendo

IPC分类号： B65H352

CPC分类号： B65H3/5215 ,  B65H27/00 ,  B65H2401/10 ,  B65H2404/1115 ,  B65H2404/1312

摘要： A retard roller of non-ground surface type which is virtually free from adhesion of paper dust thereby to have an excellent friction coefficient sustain ability, and which is free from creaky noises at a relatively low sheet feeding speed; a retard roller of non-ground surface type having little variation in outer diameter; and a sheet feeder employing such a retard roller. The retard roller comprises a roller body and a shaft extending axially therethrough, the roller body having a textured roller surface comprising a multiplicity of island portions (10) and a sea portion (11) recessed from the island portions, the island portions and the sea portion each having a multiplicity of fine projections (12). The ratio S1/S2 of the total area S1 of the island portions to the area S2 of the sea portion preferably is 0.25 to 0.55. The fine projections preferably each have a height of 3 to 25 &mgr;m.

摘要翻译： 一种非地面型延迟辊，其基本上没有纸粉附着，因此具有优异的摩擦系数维持能力，并且在相对低的进纸速度下没有吱吱作响的噪音; 非地面型延迟辊外径差异小; 以及采用这种延迟辊的片材进给器。 延迟辊包括辊主体和轴向延伸穿过其中的轴，该辊主体具有纹理化的辊表面，该纹理辊表面包括多个岛部分（10）和从岛部分凹陷的海洋部分（11），岛部分和海 每个具有多个精细突起（12）的部分。 岛部的总面积S1与海部的面积S2的比S1 / S2优选为0.25〜0.55。 优选的是，每个凸起的高度优选为3〜25μm的高度。