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. 13, 1988
Filed:
Sep. 19, 1983
Applicant:
Inventors:
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03G / ;
U.S. Cl.
CPC ...
355 / ; 355 / ; 355 / ; 355 / ; 355 / ; 355 / ;
Abstract
A service life indicator for an image forming process cartridge which contains a consumable used for image formation and is detachably mountable into a main assembly for the image formation, comprises a switching device, adapted to be provided in the process cartridge, actuatable in response to consumption of the consumable, and a warning device, responsive to the switching device, for warning an operator of when the service life of the process cartridge has been consumed.