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:
Oct. 20, 1992
Filed:
Apr. 30, 1990
Koichi Tanigawa, Tokyo, JP;
Akihiko Takeuchi, Kanagawa, JP;
Yasumasa Otsuka, Kanagawa, JP;
Hiroto Hasegawa, Kanagawa, JP;
Toshiyuki Yoshihara, Tokyo, JP;
Takayasu Yuminamochi, Kanagawa, JP;
Eiichi Imai, Chiba, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus has a charging device for charging a photosensitive member containing an organic photoconducter, an exposure device, a developing device including a developer, a transfer device and a cleaning device. The photosensitive member employs an organic photoconductor and a polycarbonate resin layer which forms the surface of the photosensitive member. The developer device has a sleeve with a thin layer of an electrical coating material containing dispersed carbon particles. The developer contains insulating magnetic toner particles of relatively small particle size formed from a styrene-acrylic type copolymer or a polyester resin and a magnetic powder.