| 摘要 |
<p>PROBLEM TO BE SOLVED: To suppress a folding wrinkle to a sheet when contamination that is a mixture of paper powder generated by a handling roller and ink is transferred to a pair of folding rollers, when folding processing is performed by the pair of folding rollers to the printed sheet.SOLUTION: In a sheet folding device 60, when folding processing is performed by pairs of folding rollers (61, 62), (61, 65), (65, 68) to a printed sheet (P1), for example, at least one folding roller 62 of the pair of folding rollers 61, 62 has a small diameter part 62a at a position corresponding to a width of a handling roller (23) in a sheet width direction, and has a large diameter part 62b at a portion other than the small diameter part 62a.</p> |
