公开(公告)号：US09809000B2

公开(公告)日：2017-11-07

申请号：US14886379

申请日：2015-10-19

Applicant: NISCA CORPORATION

Inventor： Mamoru Kubo

IPC: B31F5/02 ,  G03G15/00 ,  B31F1/07 ,  B42F3/00 ,  B42B4/00 ,  B42B5/00

CPC classification number: B31F5/02 ,  B31F1/07 ,  B31F2201/00 ,  B42B4/00 ,  B42B5/00 ,  B42F3/00 ,  G03G15/6541 ,  G03G15/6544 ,  G03G2215/00827 ,  G03G2215/00848 ,  G03G2215/00852

Abstract: The present invention is to provide a binding processing apparatus that prevents easy unbinding regardless of thickness of a sheet bundle to be bound and that lessens influence of damage on sheets. In the present sheet binding processing apparatus, a pair of pressurizing faces for pressure-nipping a sheet bundle are formed to have tooth forms each having a convex shape and a concave shape, the tooth forms being engaged with each other along a predetermined tooth width, and the tooth forms are shaped so that an engagement depth between a tooth top and a tooth root is varied along a tooth width direction toward a sheet end edge.