Patent ID: 8657283
Filing Date: 2014-02-25
Classification: B65H,G03G

Abstract:
1. A sheet stacking apparatus comprising: a first discharge unit configured to discharge a sheet; a first stacking unit on which the sheet discharged by the first discharge unit is stacked; a second discharge unit disposed below the first discharge unit and configured to discharge a sheet; a second stacking unit on which the sheet discharged by the second discharge unit is stacked; a first elevating unit configured to elevate the first stacking unit; an alignment unit configured to align a position of the sheet being stacked on the second stacking unit in a width direction perpendicular to a sheet discharging direction; a moving unit configured to move the alignment unit to one of an alignment position where a sheet is to be aligned, a retracting position retracted above the alignment position and an intermediate retracting position between the alignment position and the retracting position; a determining unit configured to determine a position of the first stacking unit in a vertical direction; and a control unit configured to control the moving unit based on a determination of the determining unit.