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:
Aug. 04, 1987
Filed:
Jul. 25, 1986
Applicant:
Inventors:
Yoshio Inoue, Kanagawa, JP;
Matsuyuki Aoki, Kanagawa, JP;
Assignee:
Fuji Xerox Co., Ltd., Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355 / ; 355 / ; 118691 ;
Abstract
In a toner concentration detecting device wherein developer is carried by a roll from a developer flowpath to a detection station for optical detection thereof, a restriction element is provided adjacent the roll between the developer flowpath and detection station to limit the thickness of the developer adhered to the roll. A scraper is provided downstream of the detection station for cleaning the roll, and the roll itself is covered with a non-magnetic material to provide a substantially smooth outer surface.