| 摘要 |
PROBLEM TO BE SOLVED: To provide a sheet post-processing device capable of strengthening a fold with a sufficient pressure without generating curl or crease at or near the fold. SOLUTION: This sheet post-processing device comprises a saddle stitching unit for saddle stitching a bundle of sheets, a center folding unit for folding the center part to form folds, first and second rollers moving along a fold direction to strengthen the fold while nipping and pressing the folds of the bundle of the sheets transferred from the center folding unit, and a drive part for moving the first and second rollers along the fold direction from a stand-by position separated from ends of the bundle of the sheets. The first and second rollers are isolated from each other at the stand-by position, and approach to each other to nip the folds at an area, where there is a fold of the bundle of the sheets. COPYRIGHT: (C)2009,JPO&INPIT
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