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:
Jan. 03, 1989
Filed:
Aug. 27, 1987
Kazuhiro Mizude, Toyonaka, JP;
Mita Industrial Co., Ltd., Osaka, JP;
Abstract
An automatic exposure device for a photocopying machine. A signal indicative of exposure light intensity and a signal indicative of the received light intensity from an original are obtained by initially exposing two types of original documents the densities of which are different from each other. A proper exposure light intensity is established corresponding to the density of the original document to be copied on the basis of the above-obtained intensities. If the exposure light intensity changes in accordance with the density of an original document and the exposure light intensity to be changed should exceed an upper limit value or be less than a lower limit value, that limit value is established as the proper exposure light density.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile