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:
Feb. 04, 2003
Filed:
Nov. 14, 2001
Toru Miyasaka, Hitachi, JP;
Kazushige Oonishi, Hitachi, JP;
Masahiko Saito, Kitaibaraki, JP;
Tadashi Okano, Hitachi, JP;
Shoji Takeya, Tokai-mura, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A color electrophotographic apparatus having a photosensitive member, an exposing device for forming an electrostatic latent image on the photosensitive member, four developing devices which attach toner on the photosensitive member and form a toner image and a transfer member for transferring the toner image onto a printing medium. The four developing devices include respectively a developing device for a yellow image, a magenta image, cyan image, and a black image. Each developing device includes a toner storing chamber for storing toner of a nonmagnetic one-component developer, a toner carrying member for forming a toner layer of the toner, a regulating member for regulating an amount of toner attached to the toner carrying member, a toner recovery chamber having an agitating member for agitating recovered toner, and a separating member for separating a toner supply chamber for the toner carrying member from the toner recovery chamber.