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:
Sep. 30, 2003
Filed:
Sep. 12, 2001
Matsushita Electric Industrial Co., Ltd, Osaka, JP;
Abstract
A color-image forming apparatus minimizes displacement in toner images due to irregularities in the thickness of an inter-stage transfer belt. The pattern detector detects a registration reference pattern formed on the belt. Accepting information on displacement over one cycle of travel of the belt from the pattern detector, the displacement amount calculator detects information on displacement in a print range which the toner images formed in a plurality of image-forming stations are transferred thereto. The displacement amount calculator then calculates a mean value of displacement in the range. The central processing unit (CPU) controls the image-forming timing determined by a plurality of exposure units, according to the result calculated by the displacement amount calculator.