Patent ID: 8596633
Filing Date: 2013-12-03
Classification: B65H

Abstract:
1. A sheet processing apparatus that forms asperity on a sheet bundle, which includes plural sheets, so as to bind the sheet bundle, comprising: a pair of rotating members, each having concave and convex portions on the outer periphery, configured to nip the sheet bundle and rotate with the respective phases of the concave and convex portions aligned to mesh with each other to form the asperity on the sheet bundle; a moving portion that moves at least one of the pair of the rotating members in a thickness direction of the sheet bundle; and a controlling portion configured to control the moving portion so that the moving portion moves at least one of the pair of rotating members in the thickness direction of the sheet bundle so as to nip the sheet bundle or separate from the sheet bundle during relative movement between the pair of rotating members and the sheet bundle to bind the sheet bundle.