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. 02, 2013
Filed:
Jan. 21, 2010
Osamu Wada, Osaka, JP;
Tadashi Iwamatsu, Osaka, JP;
Takanori Kamoto, Osaka, JP;
Nobuyuki Yoshioka, Osaka, JP;
Natsuki Matsuura, Shibukawa, JP;
Nobuhiro Seki, Shibukawa, JP;
Masatomo Hayashi, Shibukawa, JP;
Osamu Wada, Osaka, JP;
Tadashi Iwamatsu, Osaka, JP;
Takanori Kamoto, Osaka, JP;
Nobuyuki Yoshioka, Osaka, JP;
Natsuki Matsuura, Shibukawa, JP;
Nobuhiro Seki, Shibukawa, JP;
Masatomo Hayashi, Shibukawa, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Kanto Denka Kogyo Co., Ltd., Tokyo, JP;
Abstract
A resin coated carrier is provided that can stably charge a toner having added thereto an external additive having a large particle size over a long period of time and can prevent blocking of a developer. The resin coated carrier satisfies the following formula (1):log()>2  (1)in which Ma is a weight average molecular weight of a silicone resin having the minimum weight average molecular weight, contained in a resin coating layer, and Mb is a weight average molecular weight of a silicone resin having the maximum weight average molecular weight, and