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:
Apr. 24, 2007
Filed:
Oct. 28, 2004
Yuta Tachibana, Toyokawa, JP;
Teruhiko Fujikura, Aichi-ken, JP;
Kou Yamada, Toyohashi, JP;
Konica Minolta Business Technologies, Inc., Chiyoda-Ku, Tokyo, JP;
Abstract
A controller of a color copier according to the invention includes a drive controller section, a pattern generation section, and a velocity information acquisition section. The drive controller section changes the phase relationship in rotation angle between a drive roller driving the transfer belt and individual photosensitive drums of a plurality of imaging sections. The pattern generation section forms registered marks on the transfer belt by using the plurality of imaging sections before and after the drive controller section changes the phase relationship. The velocity information acquisition section acquires at least one of a velocity fluctuation component of individual photosensitive drums and a velocity fluctuation component of the transfer belt in accordance with the result of sensing by a mark sensor for two registered marks formed by the pattern generation section.