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:
Oct. 06, 2015
Filed:
Jul. 03, 2012
Hiromi Ogiyama, Tokyo, JP;
Tomokazu Takeuchi, Tokyo, JP;
Yasunobu Shimizu, Kanagawa, JP;
Kenji Sengoku, Kanagawa, JP;
Hiroyoshi Haga, Kanagawa, JP;
Hiromi Ogiyama, Tokyo, JP;
Tomokazu Takeuchi, Tokyo, JP;
Yasunobu Shimizu, Kanagawa, JP;
Kenji Sengoku, Kanagawa, JP;
Hiroyoshi Haga, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A transfer device including an image carrier; a transfer member disposed facing the image carrier; a transfer electrical field generator including a direct-current (DC) power source to generate a DC voltage and an alternating current (AC) power source to generate an AC voltage; and a controller. The transfer electrical field generator forms the transfer electrical field between the image carrier and the transfer member using the DC voltage and the AC voltage, to transfer the toner image on the image carrier, charged to a predetermined polarity, onto the recording medium. The controller controls the AC voltage source so that, the AC voltage output from the AC voltage source when a leading edge of the recording medium is positioned in the transfer electrical field is set larger than the AC voltage when the portion of the recording medium other than the leading edge is positioned in the transfer electrical field.