| 摘要 |
A post-processing device includes a sheet-bundle forming unit that stacks plural sheets and forms a sheet bundle; a binding unit that forms a cut in the sheet bundle, forms a tongue in the sheet bundle by cutting part of the sheet bundle into a predetermined shape so that a first end remains uncut and continues to the sheet bundle, and binds the sheet bundle by folding the tongue and inserting a second end of the tongue into the cut; a transport unit that transports the sheet bundle; a stack unit that stacks the sheet bundle; and a position change unit that changes a position of binding processing performed on the sheet bundle so that the tongue formed in the sheet bundle stacked on the stack unit does not contact another tongue formed in another sheet bundle stacked on the stack unit.
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