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:
Apr. 23, 2013
Filed:
Jan. 21, 2011
Soichiro Mase, Handa, JP;
Soichiro Mase, Handa, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya-shi, Aichi-ken, JP;
Abstract
An image forming apparatus includes: a photosensitive drum; a development roller; a transfer roller; a drum driving unit that includes a forwardly and reversely rotatable motor; a forward transport unit; a reverse transport unit; and a transfer potential control unit that is configured to control a surface potential of the transfer roller to have a reverse polarity to that of the developer on the photosensitive drum during the forward rotation of the motor and control the surface potential of the transfer roller to be a potential that has the same polarity as the developer on the photosensitive drum and is equal to or higher than a surface potential of the photosensitive drum during the reverse rotation of the motor.