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:
May. 27, 2008
Toyotsune Inoue, Osaka, JP;
Takahisa Nakaue, Osaka, JP;
Akihiro Watanabe, Osaka, JP;
Masashi Fujishima, Osaka, JP;
Shoichi Sakata, Osaka, JP;
Yukihiro Mori, Osaka, JP;
Toyotsune Inoue, Osaka, JP;
Takahisa Nakaue, Osaka, JP;
Akihiro Watanabe, Osaka, JP;
Masashi Fujishima, Osaka, JP;
Shoichi Sakata, Osaka, JP;
Yukihiro Mori, Osaka, JP;
Kyocera Mita Corporation, , JP;
Abstract
A developing device uses a two-component developer including at least carriers and toners. The toners are supplied to an image bearing member bearing an electrostatic latent image so that a toner image is developed from the electrostatic latent image. The developing device has a developing roller arranged to oppose the image bearing member; and a magnetic roller arranged to oppose the developing roller. The magnetic roller retains the two-component developer to supply toners to the developing roller. The developing roller and the magnetic roller are rotationally driven in directions to be opposite from one another at an opposed position, and a magnetic pole of the magnetic roller and a magnetic pole of the developing roller have magnetic polarities different from one another at the opposed position. A surface roughness of the magnetic roller is greater than a surface roughness of the developing roller.