SHEET PROCESSING APPARATUS AND IMAGE FORMING APPARATUS

摘要

A staple-less binding unit including a pair of upper and lower teeth binds a sheet bundle which is discharged to an intermediate processing tray by a sheet discharge portion and whose one edge abuts against a rear edge stopper. A control portion switches a binding mode of the staple-less binding unit that implements the binding process on the sheet bundle in a first binding mode of binding the sheet bundle without any staple such that the pair of upper and lower teeth bite across an edge of the sheet bundle and in a second binding mode of binding the sheet bundle without any staple such that the pair of upper and lower teeth do not bite across any edge of the sheet bundle.

主权项

1. A sheet processing apparatus controlled by a control portion, the sheet processing apparatus comprising:
a sheet stacking portion configured to stack sheets; and a sheet binding unit having first and second concavo-convex binding teeth disposed such that they engage with each other and performing a binding process by forming a plurality of concavo-convex dents extending in a predetermined direction on a bundle of sheets stacked on the sheet stacking portion by the first and second binding teeth, the sheet binding unit selectively performing a first binding mode of forming the plurality of concavo-convex dents on the sheet bundle by biting the sheet bundle by the first and second binding teeth such that the first and second binding teeth bite across at least one edge of two edges of the sheet bundle and a second binding mode of forming the plurality of concavo-convex dents by biting the sheet bundle by the first and second binding teeth such that the first and second binding teeth bite across none of edges of the sheet bundle.