Patent ID: 8596631

Claim:
A sheet processing apparatus comprising: a sheet stacking unit configured to receive a sheet bundle; a binding unit configured to perform binding processing on the sheet bundle stacked in the sheet stacking unit; a folding unit configured to fold the sheet bundle that is subjected to binding processing by the binding unit; a conveyance unit configured to convey the sheet bundle folded by the folding unit; a press unit configured to press a fold line portion in the folded sheet bundle conveyed by the conveyance unit, wherein the press unit presses the fold line portion from a direction perpendicular to a surface of a front page of the sheet bundle while moving along the fold line portion; a grasping unit provided separately from the folding unit, the conveyance unit and the press unit and configured to include a pair of grasping members having a grasping surface of a predetermined length in a conveyance direction of the conveyance unit and to be switched between a first state in which the pair of grasping members grasps the folded sheet bundle to fix the folded sheet bundle in position and a second state in which the pair of grasping members does not grasp the folded sheet bundle; and a control unit configured to shift the grasping unit to the first state and to cause the press unit to press the sheet bundle.