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. 25, 1978
Filed:
Nov. 04, 1976
Leon M Winthaegen, Maasbree, NL;
Mathias J Vola, Sittard, NL;
Oce-van der Grinten, N.V., Venlo, NL;
Abstract
In an electrophotographic copying apparatus in which an imagewise exposed photoconductive plate moving to a developing station passes a light source and a light shield which are arranged for selectively exposing parts of the photoconductive plate outside the area of the copy image, the light shield is made slightly light transmitting, such as by making it of a glass or plastic having a light transmittance of 2.5 to 25%, so that the light source and shield serve the dual functions of fully exposing nonimage parts of the plate and weakly exposing its image area, thus improving the contrast and tone reproduction in the developed image.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile