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:
Jul. 21, 2009
Filed:
Oct. 30, 2006
Yoichi Yamada, Shiojiri, JP;
Tomohiro Aruga, Shiojiri, JP;
Noboru Sakurai, Chino, JP;
Masanao Kunugi, Nagano-ken, JP;
Katsumi Okamoto, Shiojiri, JP;
Hiroshi Kato, Shiojiri, JP;
Yoichi Yamada, Shiojiri, JP;
Tomohiro Aruga, Shiojiri, JP;
Noboru Sakurai, Chino, JP;
Masanao Kunugi, Nagano-ken, JP;
Katsumi Okamoto, Shiojiri, JP;
Hiroshi Kato, Shiojiri, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A developing device includes a container that contains toner particles that are for developing a latent image borne by an image bearing body, and a toner-particle bearing roller that has a helical groove portion on a surface thereof that is for bearing the toner particles, the helical groove portion having an inclination with respect to an axial direction and a circumferential direction of the toner-particle bearing roller and being formed having a uniform pitch in the axial direction.