| 摘要 |
A sheet finisher includes: a sheet stacker for stacking sheets outputted from an image forming apparatus to form a sheet bundle; a binder for binding the sheet bundle stacked on the sheet stacker; an ejection device for ejecting out of the sheet finisher at least one of the sheet bundle stacked on the sheet stacker and the sheet bundle which has been bound; an ejection tray for stacking the ejected sheet bundle or the bound sheet bundle sequentially; and a controller for controlling the ejection device to make the bound sheet bundle to wait on the sheet stacker, to make a sheet outputted from the apparatus which have not been bound to stack sequentially on the bound sheet bundle, and to make the bound sheet bundle and the sheet stacked on the bound sheet bundle as a unit to eject to the ejection tray.
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