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:
Jun. 16, 2015
Filed:
May. 31, 2012
Yasunobu Shimizu, Kanagawa, JP;
Hiroyoshi Haga, Kanagawa, JP;
Tomokazu Takeuchi, Tokyo, JP;
Hiromi Ogiyama, Tokyo, JP;
Kenji Sengoku, Kanagawa, JP;
Junpei Fujita, Kanagawa, JP;
Yasunobu Shimizu, Kanagawa, JP;
Hiroyoshi Haga, Kanagawa, JP;
Tomokazu Takeuchi, Tokyo, JP;
Hiromi Ogiyama, Tokyo, JP;
Kenji Sengoku, Kanagawa, JP;
Junpei Fujita, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus includes an image carrier; a facing member facing the image carrier via a transfer position; a power supply to output a voltage between a first position on the image carrier side and a second position on the facing member side; a resistance detector to detect electrical resistance between the first position and the second position via the transfer position; and a controller to switch between a first transfer mode in which the power supply outputs a direct current voltage, and a second transfer mode in which the power supply outputs a superimposed voltage. When a toner image on the image carrier is transferred onto a recording medium at the transfer position, the controller selects either the first transfer mode or the second transfer mode. When the resistance detector detects the electrical resistance, the controller selects the first transfer mode.