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:
Sep. 25, 1990
Filed:
Apr. 09, 1987
Applicant:
Inventors:
Assignee:
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G / ; G03G / ;
U.S. Cl.
CPC ...
355327 ; 355219 ; 355326 ; 430 42 ; 430 45 ;
Abstract
In a method and apparatus of forming a muticolor picture by electrophotography, first color toner, second color toner and third color toner are allowed to stick onto a photosensitive material according to the conventional method. Then after the surface of the photosensitive material is discharged to decrease the surface potential thereof, a fourth color toner is allowed to stick onto the photosensitive material, whereby mixing of the fourth color with the first, second and third colors is prevented.