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:
Feb. 25, 1986
Filed:
Jul. 13, 1984
Applicant:
Inventors:
Masazumi Ito, Toyohashi, JP;
Yutaka Irie, Toyokawa, JP;
Yoshikazu Ikenoue, Toyokawa, JP;
Minoru Nakamura, Toyohashi, JP;
Assignee:
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355 / ; 355 55 ; 355 / ;
Abstract
There is disclosed an image density control apparatus for copying machines in which an area of a pattern image that is formed by projecting a reference pattern through an optical system is limited to a constant area irrespective of the copy magnification. Then the pattern image is developed and its toner density is detected to serve for controlling the image density. Accordingly, the image density is controlled with accuracy, irrespective of the copy magnification.