| US 7,583,282 B2 | ||
| Image printing apparatus and image printing method | ||
| Kazumichi Yamauchi, Tokyo (Japan); Satoshi Sakata, Tokyo (Japan); Akira Okamoto, Tokyo (Japan); Kenji Yamamoto, Tokyo (Japan); and Kazutoshi Yoshimura, Tokyo (Japan) | ||
| Assigned to Konica Minolta Business Technologies, Inc., (Japan) | ||
| Filed on Sep. 14, 2006, as Appl. No. 11/521,049. | ||
| Claims priority of application No. 2006-000624 (JP), filed on Jan. 05, 2006; and application No. 2006-177725 (JP), filed on Jun. 28, 2006. | ||
| Prior Publication US 2007/0153077 A1, Jul. 05, 2007 | ||
| Int. Cl. B41J 2/435 (2006.01) | ||
| U.S. Cl. 347—234 [347/229; 347/248] | 26 Claims |
| 1. An image printing apparatus for printing images on front and back surfaces of a sheet, comprising:
an image printing section which forms the image for the front surface of the sheet as well as an image of a reference mark
on a photosensitive member at one portion in a region outside an image region and transfers the images formed on the photosensitive
member onto the front surface of the sheet;
a fixing unit which fixes the transferred images on the sheet;
a sensor which detects the reference mark by scanning at least two scanning lines of the reference mark after fixing printed
on the front surface of the sheet;
an arithmetic operating section which obtains a shrinkage factor of the sheet on the basis of a size of one and only one reference
mark before fixing and a size of the one and only one reference mark after fixing and calculates a position and magnification
of the image to be printed on the back surface on the basis of the shrinkage factor; and
a control section which performs control operation to print the image on the back surface of the sheet on the basis of the
calculated position and the calculated magnification.
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