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. 06, 1977
Filed:
Nov. 17, 1975
Applicant:
Inventors:
Assignee:
Canon Kabushiki Kaisha, Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355 / ; 96 / ;
Abstract
An electrophotographic method by the use of a photosensitive screen having a number of tiny openings therein and by modulation of corona ion current, wherein a primary electrostatic latent image is first formed on the screen by application of electrostatic charge in conformity to an original image to be reproduced, thus a secondary electrostatic latent image is formed by modulating corona ion current for a plurality of times by the use of one and the same primary electrostatic latent image, and applying to the screen, alternately with the corona ion modulation, a corona ion current of a polarity capable of eliminating the charge polarity of the modulating corona ion current.