| US 7,574,167 B2 | ||
| Image forming apparatus | ||
| Akira Okamoto, Hino (Japan); Satoshi Sakata, Hino (Japan); Kenji Yamamoto, Hachioji (Japan); Kazumichi Yamauchi, Hachioji (Japan); and Kazutoshi Yoshimura, Hachioji (Japan) | ||
| Assigned to Konica Minolta Business Technologies, Inc., (Japan) | ||
| Filed on Sep. 11, 2006, as Appl. No. 11/519,119. | ||
| Claims priority of application No. 2005-347503 (JP), filed on Dec. 01, 2005. | ||
| Prior Publication US 2007/0127964 A1, Jun. 07, 2007 | ||
| Int. Cl. G03G 15/00 (2006.01) | ||
| U.S. Cl. 399—395 [399/306; 399/364; 399/401; 400/579] | 11 Claims |
| 1. An image forming apparatus which forms images on both sides of a transfer sheet, the image forming apparatus comprising:
an image forming device which forms an image on a front surface of the transfer sheet and then forms an image on a rear surface
of the transfer sheet;
a conveying device for conveying the transfer sheet to the image forming device in a conveyance direction; and
a control section for controlling the conveying device,
wherein the conveying device comprises:
paired registration rollers arranged in a direction perpendicular to the conveyance direction of the transfer sheet for being
hit by the transfer sheet; and
a tilting device which changes an inclination of the paired registration rollers from the direction perpendicular to the conveyance
direction,
wherein when forming an image on the front surface of the transfer sheet by the image forming device, the tilting device changes
the inclination of the paired registration rollers according to a first skew amount of a first side of the transfer sheet
representing a leading edge in the conveyance direction before the transfer sheet hits the paired registration rollers and,
after the transfer sheet hits the paired registration rollers, the control section controls so as to convey the transfer sheet
while keeping a state of the paired registration rollers whose inclination has been changed by the tilting device, and
wherein when forming an image on the rear surface of the transfer sheet by the image forming device, the tilting device changes
the inclination of the paired registration rollers according to a second skew amount of a second side of the transfer sheet
representing a leading edge in the conveyance direction before the transfer sheet hits the paired registration rollers, and,
after the transfer sheet hits the paired registration rollers, the control section controls so as to convey the transfer sheet
while keeping a state of the paired registration rollers whose inclination has been changed by the tilting device.
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