Sheet-bundle processing apparatus in which sheets are aligned using variable pressing force

摘要

A sheet processing apparatus has at least one sheet receiving tray for accommodating sheets; a sheet discharge device for discharging the sheets onto the sheet receiving tray; an aligning device that presses end surfaces of the sheets accommodated in the sheet receiving tray to align the sheets; and a processing device for binding the sheets accommodated in the sheet receiving tray, wherein the pressing force in the widthwise direction of the sheets exerted by the aligning device is changed in accordance with the change in mode of the process when the processing device performs the process.