Patent ID: 7866651

Claim:
A sheet processing apparatus which processes sheets comprising: a sheet process tray on which sheets to be processed are stacked; a sheet transport portion which transports processed sheets on the sheet process tray; a pressing member which is provided upstream of the sheet transport portion with respect to a sheet transport direction and which moves in the sheet transport direction while pressing the processed sheets, so as to transport the processed sheets in cooperation with the sheet transport portion; and a controller which operates the pressing member, wherein the controller performs control such that when the number of sheets in a processed sheet bundle on the sheet process tray is less than a predetermined number, the pressure member is not operated, and that when the number of sheets in the processed sheet bundle is larger than the predetermined number, the pressure member is operated, and wherein the controller controls the sheet transport speed of the pressing member when selectively operating the pressing member such that the sheet transport speed of the pressing member is equal to the sheet transport speed of the sheet transport portion.