The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 03, 2004
Filed:
Aug. 27, 2002
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
An image forming apparatus has a plurality of image forming units for forming images in various colors, and transfers images formed by these image forming units onto a transfer belt an overlapping manner. The image forming apparatus includes a control unit for outputting a predetermined control signal in order to form a color-shift detecting pattern with respect to the transfer belt by employing a plurality of these image forming units, and a pattern detecting sensor for reading the color-shift detecting pattern formed on the transfer belt by this control unit. Under normal operation, the control unit controls forming operation of color-shift detecting patterns by using only commonly-used color image forming units, while the control unit does not form a color-shift detecting pattern by using a specific-color image forming unit.