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:
Aug. 10, 2004
Filed:
Jun. 04, 2001
Tomomi Kakeshita, Shizuoka, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention provides an image forming apparatus and method for determining a remaining amount of developer contained in a cartridge including a developer container for containing developer, a developer amount detecting device for detecting an amount of the developer contained in the developer container, and a calculating device for calculating a display level of a remaining amount of the developer. At least the developer container is detachably mountable to a main body of an image forming apparatus as a unit. The calculating device calculates the display level on the basis of a detection amount of the developer amount detecting device and predetermined information regarding a developer remaining amount in the container upon generation of a white void image.