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, 1997
Filed:
Nov. 23, 1994
Masami Takeda, Kawasaki, JP;
Kimio Nakahata, Kawasaki, JP;
Masuo Yamazaki, Yokohama, JP;
Katsuhiko Nishimura, Yokohama, JP;
Hiromichi Yamada, Yokohama, JP;
Tatsuya Nakamura, Tokyo, JP;
Tohru Saitou, Yokohama, JP;
Tohru Kosaka, Machida, JP;
Takashi Shibuya, Kawasaki, JP;
Yasuo Yoda, Kawasaki, JP;
Masahide Hirai, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
This invention relates to a color image forming apparatus for forming a color image with dry developer, capable of preventing deterioration of image quality, resulting from contamination of optical components by the non-magnetic developer scattered from the developing unit. For this purpose there are provided, along the moving direction of an image bearing member effecting endless movement, charging means, optical means, first developing means utilizing developer containing a magnetic component, second developing means utilizing non-magnetic developer of a color different from that of the developer of the first developing means, and transfer means maintained in contact with or close to the image bearing member for transferring a developed image from the image bearing member to a recording material such as paper. A space containing the second developing means is enclosed by the shape of the first developing means, transfer means and image bearing member.