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. 09, 2019
Filed:
Oct. 12, 2017
Masahiro Seki, Shizuoka, JP;
Hiroyuki Kishida, Shizuoka, JP;
Haruki Murata, Kanagawa, JP;
Shinya Nakagawa, Shizuoka, JP;
Kei Niwayama, Shizuoka, JP;
Saori Yamada, Shizuoka, JP;
Kohsuke Miyazaki, Shizuoka, JP;
Masahiro Seki, Shizuoka, JP;
Hiroyuki Kishida, Shizuoka, JP;
Haruki Murata, Kanagawa, JP;
Shinya Nakagawa, Shizuoka, JP;
Kei Niwayama, Shizuoka, JP;
Saori Yamada, Shizuoka, JP;
Kohsuke Miyazaki, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A carrier for a developer of an electrostatic latent image, the carrier including: core particles having magnetism; and a coating layer coating a surface of each of the core particles, wherein the coating layer includes two or more kinds of inorganic particles, at least one kind of inorganic particles among the two or more kinds of inorganic particles is inorganic particles A having conductivity and a peak particle diameter of from 300 nm through 1,000 nm, and surface roughness of the carrier calculated by Formula 1 below is from 1.10 m/g through 1.90 m/g,C−F  Formula 1where C is a BET specific surface area (m/g) of the carrier and F is a BET specific surface area (m/g) of the core particles.