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. 14, 2009
Filed:
Mar. 19, 2007
Tatsuya Watahiki, Sagamihara, JP;
Tatsuya Watahiki, Sagamihara, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A rotation device includes a rotation member, rotation driving source, transmission mechanism, rotation pulse generation mechanism, target value arrangement mechanism, correction value computation mechanism, and control mechanism. The transmission mechanism decreases the rotation speed at a non-integer gear ratio. The target value arrangement mechanism includes a rotation unevenness provision mechanism to impart a plurality of kinds of sine-wave unevenness to the rotation speed target value. The correction value computation mechanism determines the correction value to adjust rotation fluctuation caused by a rotation axis eccentricity component of the rotation driving source and at least one noise component having a cycle relationship with a rotation cycle of the rotation member based on a time interval of a pulse train generated every rotation of the rotation member by the rotation pulse generation mechanism when the plurality of kinds of the rotation unevenness are imparted to the rotation speed target value.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile