| 摘要 |
A sheet processing apparatus according to the invention includes a sheet feeding tray capable of aligning and storing plural sheets, a discharging member that discharges a sheet at the top of a bundle of the sheets aligned from the sheet feeding tray, and a retracting member that moves the sheet at the top of the sheet bundle in a direction opposite to a direction of the discharge. When plural pieces of plural types of sheets are stored in the sheet feeding tray, the sheet processing apparatus controls the operations of the discharging member and the retracting member, discharges, for each of the types, a sheet located at the top of the sheet feeding tray and retracts the remaining sheets, performs alignment again at a point when the discharge and the retraction are finished for all the types, and repeats the operations to sequentially discharge the sheets of the respective types.
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