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:
May. 19, 2015
Filed:
Sep. 06, 2012
Yoshimichi Ikeda, Numazu, JP;
Yoshimichi Ikeda, Numazu, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
An apparatus includes a first rotation member, a second rotation member that rotates while being in indirect contact with the first rotation member via a medium or being in direct contact with the first rotation member without the medium, a first drive motor that drives the first rotation member, and a second drive motor that drives the second rotation member. In addition, a first control unit controls the first drive motor to cause the first rotation member to rotate at a constant rotation frequency, a second control unit controls the second drive motor, and a rotation frequency detection unit detects a rotation frequency of the second drive motor. The second control unit is configured to control a rotation frequency of the second drive motor based on the detected rotation frequency of the second drive motor such that the second rotation member is driven to accompany the first rotation member.