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. 19, 2013
Filed:
Oct. 11, 2011
Yoichi Yamada, Shiojiri, JP;
Tomohiro Aruga, Shiojiri, JP;
Noboru Sakurai, Chino, JP;
Katsumi Okamoto, Shiojiri, JP;
Hiroshi Kato, Shiojiri, JP;
Masanao Kunugi, Nagano-ken, JP;
Takatomo Fukumoto, Shiojiri, JP;
Yoichi Yamada, Shiojiri, JP;
Tomohiro Aruga, Shiojiri, JP;
Noboru Sakurai, Chino, JP;
Katsumi Okamoto, Shiojiri, JP;
Hiroshi Kato, Shiojiri, JP;
Masanao Kunugi, Nagano-ken, JP;
Takatomo Fukumoto, Shiojiri, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A developing device includes a toner particle-bearing roller that bears toner particles on its surface and develops a latent image borne by an image-bearing member with those toner particles, the toner particle-bearing roller has a projection portion disposed on its surface, the projection portion having a top surface having a flat portion, and a width of the top surface being equal to or more than a volume average particle diameter of the toner particles.