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:
Dec. 07, 2010
Filed:
Oct. 22, 2007
Jun Mochizuki, Abiko, JP;
Jun Mochizuki, Abiko, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus according to an exemplary embodiment of the invention includes a first image forming portion, a second image forming portion, a secondary transfer device, a transfer power supply, a controller. The first and second image forming portions include image bearing members, chargers, development devices, and transfer members. The first charger charges the first image bearing member in the same polarity as a predetermined polarity. The second charger for charging the second image bearing member in a polarity opposite the predetermined polarity. The controller controls the transfer power supply such that the transfer voltage applied to the second transfer member in the second image forming portion is not changed nor turned on and off in a period during which the toner image is transferred to the intermediate transfer member in the first image forming portion.