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:
Sep. 20, 2005
Filed:
Feb. 24, 2003
Masao Uyama, Shizuoka, JP;
Masahide Kinoshita, Shizuoka, JP;
Atsushi Numagami, Kanagawa, JP;
Kazunari Murayama, Shizuoka, JP;
Seiji Yamaguchi, Shizuoka, JP;
Takahito Ueno, Shizuoka, JP;
Masao Uyama, Shizuoka, JP;
Masahide Kinoshita, Shizuoka, JP;
Atsushi Numagami, Kanagawa, JP;
Kazunari Murayama, Shizuoka, JP;
Seiji Yamaguchi, Shizuoka, JP;
Takahito Ueno, Shizuoka, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The image forming apparatus has a developer container containing a developer therein, a developer toner density detecting portion for detecting the permeability of the developer in the developer container to thereby detect toner density, and an engine controller for detecting whether the image forming apparatus has gone wrong, on the basis of the toner density detected by the developer toner density detecting portion. Thereby, it becomes possible to detect the failure of a developing apparatus reliably and early by an inexpensive construction.