| 摘要 |
PROBLEM TO BE SOLVED: To provide a decurl device capable of properly removing curl caused on a paper after passing through a fixing device in accordance with type of paper. SOLUTION: When a clutch part 744a is turned on while a gear part 744b is rotated in the direction of arrow mark D, a gear 742 for a front annular body, a clutch roller shaft 741, and a gear 743 for a rear annular body are integrally rotated in the direction of arrow mark D. When the clutch part 744a is turned off while a pair of annular bodies 73 are rotated by a predetermined angle in the direction of arrow mark H, a soft roller 71 is pressed against any of a first inner peripheral face 731 to a fourth inner peripheral face 734 of the annular body 73 to deform a part of a soft roller part 712 engaging with a hard roller part 722 elastically in various manners so that the soft roller part 712 is abutted on the hard roller part 722 by keeping predetermined nip pressure. Consequently, nip pressure applied on a paper is changed into various forms. COPYRIGHT: (C)2006,JPO&NCIPI
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