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. 04, 2014
Filed:
Aug. 23, 2012
Shigenori Yaguchi, Shizuoka, JP;
Kimitoshi Yamaguchi, Shizuoka, JP;
Toyoshi Sawada, Kanagawa, JP;
Hitoshi Iwatsuki, Shizuoka, JP;
Toyoaki Tano, Shizuoka, JP;
Hiroshi Tohmatsu, Shizuoka, JP;
Shigenori Yaguchi, Shizuoka, JP;
Kimitoshi Yamaguchi, Shizuoka, JP;
Toyoshi Sawada, Kanagawa, JP;
Hitoshi Iwatsuki, Shizuoka, JP;
Toyoaki Tano, Shizuoka, JP;
Hiroshi Tohmatsu, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A latent electrostatic image developing carrier including: core particles each having magnetism; and a coating layer covering each of the core particles, wherein the latent electrostatic image developing carrier has a shape factor SF-2 of 115 to 150 and has a bulk density of 1.8 g/cmto 2.4 g/cm, wherein the core particles have a shape factor SF-2 of 120 to 160 and have an arithmetic mean surface roughness Ra of 0.5 μm to 1.0 μm, and wherein the coating layer contains a resin and a filler and an amount of the filler contained in the coating layer is 50 parts by mass to 500 parts by mass per 100 parts by mass of the resin contained in the coating layer.