| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To set the pressure contact force of a delivery driven roller with respect to a delivery driving roller to the optimum according to the thickness of an image forming paper sheet and to improve the stacking performance for the image forming paper sheets different in thickness by restraining lowering of pressure contact force of the delivery driven roller with respect to the delivery driving roller. <P>SOLUTION: The downstream end of the paper delivery path is provided with three delivery driven rollers 30a, 30b, 30c selectively switched to come into pressure contact with a single delivery driving roller 360, thereby straightening the curl state of the image forming paper sheet and a switching means for switching the delivery driven rollers according to the thickness of the image forming paper sheet transported to the paper delivery path. The diameters R11, R12, R13 of the respective driven rollers are set to the same diameter (R11=R12=R13), and the distances L11, L12, L13 from the center O of a rotating member 30d to the centers of the respective delivery driven rollers are varied (L11>L12>L13). <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
