Patent ID: 8135493
Filing Date: 2012-03-13
Classification: B65H

Abstract:
1. A sheet stacking apparatus comprising: an upper discharge port and a lower discharge port, located below the upper discharge port, each capable of discharging a sheet; a stacking portion having an upper tray and a lower tray, located below the upper tray, each capable of stacking sheets discharged from one of the upper and lower discharge ports and moving vertically; and a controller which controls the vertical motion of the upper tray and the lower tray, wherein the controller is capable of setting a first mode and a second mode in which a lower limit position of the upper tray stacked with sheets discharged from the upper discharge port is different, the lower limit position of the upper tray in the first mode is above the lower discharge port, the lower limit position of the upper tray in the second mode is a position in which the upper tray or sheets stacked on the upper tray blocks the lower discharge port, and the controller executes change-over between the first mode and the second mode depending on an information of a selected stacking mode.