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:
Apr. 22, 2008
Filed:
Aug. 11, 2006
Masayoshi Shimamura, Kanagawa, JP;
Yasuhide Goseki, Kanagawa, JP;
Yasutaka Akashi, Kanagawa, JP;
Kenji Fujishima, Kanagawa, JP;
Kazunori Saiki, Kanagawa, JP;
Satoshi Otake, Shizuoka, JP;
Naoki Okamoto, Shizuoka, JP;
Masayoshi Shimamura, Kanagawa, JP;
Yasuhide Goseki, Kanagawa, JP;
Yasutaka Akashi, Kanagawa, JP;
Kenji Fujishima, Kanagawa, JP;
Kazunori Saiki, Kanagawa, JP;
Satoshi Otake, Shizuoka, JP;
Naoki Okamoto, Shizuoka, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A developer carrier is capable of stably charging a toner over a long term without change in physical surface shape and composition. The developer carrier has at least a substrate and resin coating layer formed on a surface of the substrate. The resin coating layer includes at least graphitized particles (i) with a degree of graphitization p() of 0.20 to 0.95 and an indentation hardness HUT [] of 15 to 60 or graphitized particles (ii) with a degree of graphitization p() of 0.20 to 0.95 and an average circularity SF-of 0.64 or more.