| 摘要 |
PROBLEM TO BE SOLVED: To provide a sheet postprocessing device applying load to a narrow range of a sheet bundle folding part by making the width of a roller smaller than that of a sheet bundle. SOLUTION: In the sheet postprocessing device having a middle folding roller 47 for folding a sheet while the sheet passes through a nip, paired additional folding rollers 49, 51, 53 for folding additionally a folded sheet bundle and a folding means 45 folding the sheet, the additional folding rollers 49, 51, 53 are arranged in the same direction as the sheet carrying direction, and the width of the additional folding rollers 49, 51, 53 is set smaller than that of the sheet. COPYRIGHT: (C)2007,JPO&INPIT
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