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:
Dec. 31, 2002
Filed:
Jan. 11, 2001
Applicant:
Inventor:
Hidetoshi Yamashita, Numazu, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G 1/508 ; G03G 1/501 ;
U.S. Cl.
CPC ...
G03G 1/508 ; G03G 1/501 ;
Abstract
An image forming apparatus includes an image bearer bearing a static image and an exchangeable type developing apparatus for developing the static image on the image bearer. The developing apparatus includes a developing chamber having a developing roller in an opening opposite to the image bearer, and a containing chamber containing a developer to be supplied to the developing chamber. A detection electrode is disposed outside the developing device and in which a voltage is induced. A detection device detects an amount of the developer in the containing chamber on the basis of an induced voltage in the detection electrode.