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:
Mar. 14, 1989
Filed:
Jul. 26, 1988
Yutaka Komiya, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A copying machine including a photoelectric converter to photoelectrically convert an original image, a reference density signal generator to generate reference density signals, an A/D converter to A/D convert the signal produced by the photoelectric converter based on the reference signals from the reference density signal generator, a regional value allotment circuit which generates regional value signals for two values sequentially in synchronism with a picture element read by the photoelectric converter, a selector to select the regional value or regional value allotment, and an output device to output a reproduced signal from the selected regional value allotment signal coming from the regional value allotment circuit and the converted signal coming from the A/D converter in order to obtain a copy having desired intermediate tone.