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:
Mar. 07, 2000
Filed:
Jul. 10, 1998
Applicant:
Inventors:
Akira Domon, Kashiwa, JP;
Yasushi Shimizu, Toride, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
399 27 ; 399254 ;
Abstract
A developing apparatus includes a developing container for storing a developing agent, a developing agent carrier which is disposed at the opening of the developing container, and carries the developing agent, a detection member which is disposed in the developing container and moves at a predetermined cycle, and a judging means for judging the residual amount of developing agent on the basis of changes in voltage induced at the detection member in the cycle.