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:
Jul. 09, 1996
Filed:
Feb. 24, 1994
Applicant:
Inventor:
Fumito Ide, Zama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355208 ; 355246 ;
Abstract
A developing device incorporated into a copying machine of the present invention has a developer/toner supplying section in which a developing tank and a toner cartridge are independently and detachably formed. A toner density sensor for controlling toner density of developer is provided in the developing device. The toner density sensor is used to detect a developer drawing defect and maintain a predetermined value of toner density during the copying operation when developer is supplied from the developer/toner supply section.