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:
Jul. 31, 2007
Filed:
Aug. 15, 2005
Yuji Matsuda, Tokyo, JP;
Hiromichi Matsuda, Kanagawa, JP;
Toshiyuki Andoh, Kanagawa, JP;
Nobuto Yokokawa, Saitama, JP;
Ryoji Imai, Kanagawa, JP;
Hiroshi Okamura, Kanagawa, JP;
Masato Yokoyama, Kanagawa, JP;
Kazuhiko Kobayashi, Tokyo, JP;
Yohei Miura, Chiba, JP;
Yuji Matsuda, Tokyo, JP;
Hiromichi Matsuda, Kanagawa, JP;
Toshiyuki Andoh, Kanagawa, JP;
Nobuto Yokokawa, Saitama, JP;
Ryoji Imai, Kanagawa, JP;
Hiroshi Okamura, Kanagawa, JP;
Masato Yokoyama, Kanagawa, JP;
Kazuhiko Kobayashi, Tokyo, JP;
Yohei Miura, Chiba, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
To compensate for the variation in the output signal from an encoder due to the variation in the thickness of an endless belt, an apparatus includes: a detector that detects a reference position on the endless belt; a correction-value calculating unit that calculates a correction value for each position on the endless belt based on the thickness; and a target-value calculating unit that adjusts a target value for controlling a driving motor based on the correction value corresponding to a distance from the reference position to the current position.