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:
Nov. 05, 1985
Filed:
Jun. 01, 1984
Applicant:
Inventors:
Matsuyuki Aoki, Ebina, JP;
Shuji Tanaka, Ebina, JP;
Assignee:
Fuji Xerox Co., Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355 / ; 355 / ; 118691 ;
Abstract
A developer density detecting apparatus in a copying machine including a detector roll assembly rotatably supported adjacent to a developing roll. The detector roll assembly comprises a sleeve and a plurality of magnets attached to the inner peripheral surface of the sleeve. The magnets are arranged to have different polarity alternately and terminates in the same polarity at both peripheral ends. A conductive glass is provided for receiving toners from the detector roll assembly. Mounted on the conductive glass is a photoelectrical detector for detecting developer density from the toners adhered to the conductive glass.