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. 23, 2005
Filed:
Apr. 23, 2004
Tadayuki Ueda, Kokubunji, JP;
Hiroyuki Maruyama, Kanagawa, JP;
Jun Onishi, Hino, JP;
Konica Minolta Business Technologies, Inc., Tokyo, JP;
Abstract
There is described an image-forming apparatus having a rotation system constituted by a driving roller, a driven roller and a transfer belt, threaded on both the driving roller and the driven roller. The apparatus includes: a motor to drive the rotation system, a rotational axis of the motor being coupled to the driving roller directly or through a power transmission element disposed between them; a first rotational-velocity controlling section to control a first rotational velocity of the motor; a velocity detecting section to detect a second rotational velocity of the driving roller or the driven roller; and a second rotational-velocity controlling section to also control the first rotational velocity of the motor, based on a detected signal detected by the velocity detecting section. The second rotational-velocity controlling section employs either a feedback controlling method or a feed-forward controlling method to control the first rotational velocity.