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. 29, 2016
Filed:
Jan. 29, 2014
Shigenori Yaguchi, Shizuoka, JP;
Koichi Sakata, Shizuoka, JP;
Hitoshi Iwatsuki, Shizuoka, JP;
Toyoaki Tano, Shizuoka, JP;
Hiroyuki Kishida, Shizuoka, JP;
Kenichi Mashiko, Shizuoka, JP;
Hiroshi Tohmatsu, Shizuoka, JP;
Shigenori Yaguchi, Shizuoka, JP;
Koichi Sakata, Shizuoka, JP;
Hitoshi Iwatsuki, Shizuoka, JP;
Toyoaki Tano, Shizuoka, JP;
Hiroyuki Kishida, Shizuoka, JP;
Kenichi Mashiko, Shizuoka, JP;
Hiroshi Tohmatsu, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A carrier is provided. The carrier includes a particulate magnetic core, and a cover layer located on the surface of the particulate magnetic core and including a resin and a filler. When determined from observation of cross-section of the carrier, the shape factor SF2 of the carrier is from 120 to 160, the ratio of the average domain diameter of the particulate magnetic core to the number average particle diameter of the filler is from 1:1 to 1:0.003, and the area ratio of the filler in the cover layer is from 30 to 85%.