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:
May. 10, 2005
Filed:
Apr. 05, 2001
Hideki Matsumoto, Mishima, JP;
Kazushige Sakurai, Mishima, JP;
Takeo Shoji, Shizuoka-ken, JP;
Toshiyuki Karakama, Shizuoka-ken, JP;
Toru Oguma, Mishima, JP;
Katsuhiro Kojima, Shizuoka-ken, JP;
Hideki Matsumoto, Mishima, JP;
Kazushige Sakurai, Mishima, JP;
Takeo Shoji, Shizuoka-ken, JP;
Toshiyuki Karakama, Shizuoka-ken, JP;
Toru Oguma, Mishima, JP;
Katsuhiro Kojima, Shizuoka-ken, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A developing device usable with a main assembly of an electrophotographic image forming apparatus includes a developing member for supplying a developer to an electrophotographic photosensitive member for developing an electrostatic latent image formed on the electrophotographic photosensitive member, a first electrode, and a second electrode. An electrical signal is generated in accordance with an electrostatic capacity between the first electrode and second electrode when the first electrode or the second electrode is supplied with a voltage from the main assembly of the electrophotographic image forming apparatus, and is measured by the main assembly of the electrophotographic image forming apparatus to detect a remaining amount of the developer.