| 摘要 |
A sheet processing apparatus for processing a sheet bundle includes a stitching unit having a head portion for driving staples into the sheet bundle and an anvil portion for receiving and bending the staples driven by the head portion, a feeding device for feeding the sheet bundle to a stitching position between the head portion and the anvil portion, a transport device for transporting the stitching unit to a position perpendicular to a sheet bundle feeding direction, a guide member for guiding the sheet bundle to the stitching position, and a supplement guide member. The supplement guide member retracts to a position that does not hinder the movement of the stitching unit when the stitching unit moves, and guides the sheet bundle to the guide member without a leading edge of the sheet bundle touching the upstream edge of the guide member.
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