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:
Jul. 01, 2014
Filed:
Oct. 14, 2011
Shota Oba, Kanagawa, JP;
Takashi Ochi, Kanagawa, JP;
Shigeru Inaba, Kanagawa, JP;
Yoshitaka Nakajima, Kanagawa, JP;
Akihisa Maruyama, Kanagawa, JP;
Toshihiro Kanematsu, Kanagawa, JP;
Shota Oba, Kanagawa, JP;
Takashi Ochi, Kanagawa, JP;
Shigeru Inaba, Kanagawa, JP;
Yoshitaka Nakajima, Kanagawa, JP;
Akihisa Maruyama, Kanagawa, JP;
Toshihiro Kanematsu, Kanagawa, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
An image forming apparatus includes a rotating image carrier, a charging device, a latent image forming device, a developing device having a developer holder and developing a latent image as a visible image, a voltage application unit that generates a potential difference between the image carrier and the developer holder to form an electric field, by which toner is directed toward the latent image, in a developing region, and a transfer device that transfers the visible image of the image carrier to a medium, wherein the developer holder having a concavo-convex portion having a convex portion and a concave portion is provided in an outer surface thereof and formed such that the volume resistivity of a portion corresponding to the convex portion is set to be larger than the volume resistivity of a portion corresponding to the concave portion.