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:
Mar. 10, 2015
Filed:
Nov. 19, 2012
Hiromi Ogiyama, Tokyo, JP;
Tomokazu Takeuchi, Tokyo, JP;
Yasunobu Shimizu, Kanagawa, JP;
Kenji Sengoku, Kanagawa, JP;
Hiroyoshi Haga, Ohta-ku, JP;
Shinya Tanaka, Kanagawa, JP;
Hiromi Ogiyama, Tokyo, JP;
Tomokazu Takeuchi, Tokyo, JP;
Yasunobu Shimizu, Kanagawa, JP;
Kenji Sengoku, Kanagawa, JP;
Hiroyoshi Haga, Ohta-ku, JP;
Shinya Tanaka, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An image forming apparatus includes a controller and a transfer device including a power source to output a superimposed bias in which an AC voltage is superimposed on a DC voltage, a first electrode, a second electrode disposed opposite the first electrode with an image bearing member interposed therebetween to form a transfer electric field to transfer a toner image on the image bearing member to a recording medium. The controller including a CPU adjusts the transfer electric field and a transfer speed. One of the first electrode and the second electrode is connected to the power source, and the other is grounded. The controller adjusts the transfer speed such that in a case in which an oscillating electric field of the transfer electric field is strong, a maximum transfer speed is slower than the maximum transfer speed in a case in which the oscillating electric field is weak.