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. 12, 2009
Filed:
Feb. 28, 2007
Nobuo Komiya, Yokohama, JP;
Takayuki Namiki, Yokohama, JP;
Nobuo Komiya, Yokohama, JP;
Takayuki Namiki, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus, which uses a developing device including: a developer carrying member; a developer containing portion; an agitating member agitating a developer; a developer amount detecting member outputting a signal for detecting the remaining amount of the developer contained in the developer containing portion, the image forming apparatus including a main body controller detecting the remaining amount using a first detecting unit that sets a reference value as a reference for detecting the remaining amount by the signal, and thereafter calculates the remaining amount based on an amount of change in the signal from the reference value, and a second detecting unit that detects the remaining amount based on a band of fluctuation in the signal corresponding to a rotational period of the agitating member.