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:
Feb. 13, 1979
Filed:
May. 23, 1977
Applicant:
Inventors:
Masamichi Hayashi, Aichi, JP;
Masami Nakane, Toyokawa, JP;
Assignee:
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355-8 ; 355 11 ;
Abstract
An electrophotographic copying apparatus incorporating therein an improved slit control device, which control device includes a blade member extending across the width of a photoreceptor drum. The width of the blade member in a direction normal to the axis of the photoreceptor drum is so arranged as to gradually increase toward its opposite ends in comparison with a generally uniform width in its central portion so as to form a slit which is wide in the central portion and gradually narrowed toward opposite ends, by which arrangement a sharp and definite image of an original is formed even on a photoreceptor drum of small diameter.