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:
Mar. 27, 2012
Filed:
Mar. 18, 2009
Yuichiro Ueda, Zama, JP;
Kazuhiko Kobayashi, Tokyo, JP;
Takuya Uehara, Tokyo, JP;
Takuya Murata, Tokyo, JP;
Yuji Matsuda, Inagi, JP;
Takahiro Kamekura, Kawasaki, JP;
Toshiyuki Andoh, Sagamihara, JP;
Hiromichi Matsuda, Isehara, JP;
Hiroki Ohkubo, Yokohama, JP;
Yuichiro Ueda, Zama, JP;
Kazuhiko Kobayashi, Tokyo, JP;
Takuya Uehara, Tokyo, JP;
Takuya Murata, Tokyo, JP;
Yuji Matsuda, Inagi, JP;
Takahiro Kamekura, Kawasaki, JP;
Toshiyuki Andoh, Sagamihara, JP;
Hiromichi Matsuda, Isehara, JP;
Hiroki Ohkubo, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A belt drive control device includes: first and second detection devices which detect the angular displacement or velocity of a driven rotary member and the angular displacement or velocity of a drive rotary member, respectively; an extraction device which extracts, from the difference between the detection results of the first and second detection devices, the amplitude and phase of a variation component due to belt thickness variation; a control device which controls the rotation of the drive rotary member in accordance with the extracted amplitude and phase; first and second holding devices which hold the extracted amplitude and phase and normal ranges of the amplitude and phase, respectively; and first and second feedback devices which feed back the amplitude and phase to the rotation control, and performs feedback by using a substitution value for the amplitude or phase if the amplitude or phase is out of the normal range, respectively.