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:
Apr. 10, 1990
Filed:
Jan. 09, 1989
Applicant:
Inventors:
Hidetoshi Tanaka, Yokohama, JP;
Yoshikuni Tohyama, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355245 ; 355260 ;
Abstract
An image forming apparatus including at least first and second developing devices for developing latent images formed on an image bearing member. The first and second developing devices contain developers of different colors, respectively. The second developing device contains a developer of a predetermined color and is fixedly mounted in the image forming apparatus. The first developing device contains a developer of a color other than the predetermined color and is detachably mountable in the image forming apparatus. Only the first developing device is exchangeable.