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:
Dec. 22, 1987
Filed:
Dec. 18, 1985
Applicant:
Inventors:
Katsuyoshi Fujiwara, Osaka, JP;
Shunju Anzai, Nara, JP;
Assignee:
Sharp Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
355 69 ; 355 / ;
Abstract
A light exposure controller is provided for detecting a light amount reflected by an original document in a copying machine and controlling the light volume of a copy lamp illuminating the original document according to the detected light amount. The light exposure controller has an auto/manual control mode selector switch. When the automatic control mode is switched over to the manual mode, the light volume is set at a mean value of the light volume for the last automatic control mode copying operation.