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:
Oct. 22, 1996
Filed:
Dec. 30, 1994
Applicant:
Inventor:
Hiroshi Shiba, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355246 ; 355208 ; 355214 ;
Abstract
A density control device includes an image forming unit for forming a sample image having a predetermined density onto a recording medium, a density detecting unit for detecting the density of the surface of the recording medium, and a control unit for causing the density detecting unit to detect a first density of an area where no sample image is formed on the recording medium and a second density of an area where any sample image is formed, and determining the operation conditions of the image forming unit, based on a contrast value between the first density and the second density which have been detected.