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. 29, 1986
Filed:
Dec. 01, 1983
Applicant:
Inventors:
Kazushi Yamamoto, Higashiosaka, JP;
Toyoki Tanaka, Yamatokoriyama, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355 / ; 355 71 ;
Abstract
An electrophotographic copying machine includes a device for removing charges of portions of a latent image bearing element which are unnecessary for forming a latent image. The device includes a light source, the latent image bearing element, and a light shade plate which is positioned between the light source and the latent image bearing element. The light source is positioned at the focus point of a fresnel lens. The device can be applied to a type of electrophotographic copying machine having a three-layered latent image bearing element.