Patent ID: 6957810

Claim:
A sheet finisher for executing preselected processing with a sheet conveyed thereto, said sheet finisher comprising: a first processing tray configured to temporarily store the sheet and deliver said sheet; a first and a second path both extending downstream of said first processing tray in a same direction of sheet conveyance and configured to convey a first and a second sheet stack output from said first processing tray, respectively, said first path conveying said first sheet stack upward over a downstream portion of said first processing tray as said first sheet stack is output from said first processing tray while said second path conveying said second sheet stack downward over said downstream portion as said second sheet stack is output from said first processing tray; and switching means for selecting either one of said first path and said second path, wherein said switching means steers, when said second path is selected, the sheet stack to said second path along a circumference of a conveyor roller located at a most downstream side of said first processing tray.