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:
Aug. 17, 2010
Filed:
Mar. 16, 2007
Yuji Matsuda, Tokyo, JP;
Yasuhisa Ehara, Kanagawa, JP;
Kazuhiko Kobayashi, Tokyo, JP;
Joh Ebara, Kanagawa, JP;
Noriaki Funamoto, Tokyo, JP;
Seiichi Handa, Tokyo, JP;
Hiromichi Matsuda, Kanagawa, JP;
Yuji Matsuda, Tokyo, JP;
Yasuhisa Ehara, Kanagawa, JP;
Kazuhiko Kobayashi, Tokyo, JP;
Joh Ebara, Kanagawa, JP;
Noriaki Funamoto, Tokyo, JP;
Seiichi Handa, Tokyo, JP;
Hiromichi Matsuda, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An imaging apparatus is disclosed that includes plural image carriers on which different-colored toner images are formed, the image carriers being driven and rotated to transfer the different-colored toner images onto one of an endless transfer member that is driven to rotate in contact with the image carriers or a transfer material that is carried by the endless transfer member. The imaging apparatus includes a phase calculating unit that extracts a periodic rotational variation component of each of the image carriers from a combination of periodic rotational variation components generated within said imaging apparatus and calculates a rotational phase of each of the image carriers based on the extracted periodic rotational variation component, and a rotational phase adjusting unit that adjusts a rotation stop phase of each of the image carriers based on the calculated rotational phase.