| 摘要 |
PROBLEM TO BE SOLVED: To correctly form a fold by reliably correcting skew of a paper sheet to be carried at a high speed, for example, by eliminating skew of the paper sheet by a folding unit or the like. SOLUTION: A control means 100 to control the drive of a carrying roller 54 and a resist roller 601 and the change-over of the pressing and releasing of the carrying roller 54 controls to stop the drive of the carrying roller 54 after the elapse of the first predetermined time T3 after a sensor PSb detects the passage of a tip part of a paper sheet S to be carried into a post-processing unit by the carrying roller 54, re-start the drive of the carrying roller 54 after the elapse of the second predetermined time T4 longer than the first predetermined time T3, start the drive of the resist roller 601 after the elapse of the third predetermined time T5 longer than the second predetermined time T4, and move a driven roller 54B to the releasing position by a releasing means SD4. COPYRIGHT: (C)2005,JPO&NCIPI
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