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:
Sep. 11, 1990
Filed:
Apr. 11, 1989
Applicant:
Inventor:
Minoru Nakamura, Osaka, JP;
Assignee:
Minolta Camera Kabushiki Kaisha, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355208 ; 355207 ; 355246 ;
Abstract
A control apparatus for controlling concentration of toner incorporated in developing material in a developing unit by means of controlling a toner replenishment to supply the toner in accordance with a toner concentration detected by a toner concentration detecting sensor in a first state wherein the detecting signal of the sensor is normal and to supply the toner by a constant volume at the predetermined period in a second state wherein the detecting signal of the sensor is abnormal.