Patent ID: 9315356
Filing Date: 2016-04-19
CPC Classification: B31F,B42B,B65H,G03G

Claim Text:
1. A sheet processing apparatus comprising: a conveying unit configured to convey sheets; a stacking unit configured to stack the conveyed sheets to form a sheet stack; and a binding unit configured to include a pair of toothed jaws of an upper tooth jaw and a lower tooth jaw arranged to face each other, and bind the sheet stack by pressing the sheet stack between the pair of toothed jaw, wherein at least one of the upper tooth jaw and the lower tooth jaw includes a base, a top-land portion, and side edges between the base and the top-land portion, wherein ridgelines between four sides of the top-land portion and the side edges are rounded, and a rounding radius of the top-land portion is larger than a rounding radius of the side edges.