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.

Date of Patent:
Sep. 11, 1990

Filed:

Apr. 22, 1988
Applicant:
Inventors:

Yoshiaki Takano, Osaka, JP;

Norihiko Suzuki, Osaka, JP;

Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355326 ; 355245 ;
Abstract

An image forming apparatus including an electrostatic latent image support member, a device for forming the electrostatic latent image on the support member, first and second developing devices for containing first and second developers, respectively, first and second prevention devices for preventing developing operations of the first and second developing devices, respectively, a region designating device for designating, in the electrostatic latent image, first and second regions to be developed by the first and second developers, respectively and a control device for actuating the first and second prevention devices in response to a signal from the region designating device so as to prevent the developing operations of the first and second developing devices.


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