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:
Jun. 28, 1983
Filed:
Feb. 06, 1981
Kohachi Uchida, Sagamihara, JP;
Tokyo Shibaura Denki Kabushiki Kaisha, Kawasaki, JP;
Abstract
An exposure apparatus for an electronic duplicator including a first light-receiving element for receiving light reflected by a reference reflector plate or by an original and a second light-receiving element for receiving light reflected from an image focusing point of a photosensitive medium. The doses of light received by these light-receiving elements are converted to voltage signals for comparison with a reference voltage level in a comparator. The output of the comparator is coupled through a control signal generator and a trigger pulse generator to a lamp driver for controlling the document illuminating lamp light intensity and is also coupled through the control signal generator and a transformer for controlling the bias voltage applied to a developing device.