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:
Dec. 23, 1997
Filed:
Jan. 31, 1997
Kazuki Miyamoto, Yokohama, JP;
Naoyuki Ohki, Yokohama, JP;
Masaki Nakano, Ebina, JP;
Takahiro Ushiro, Kawasaki, JP;
Yasuo Fukazu, Kawasaki, JP;
Atsushi Chaki, Yokohama, JP;
Shinichi Takata, Kawasaki, JP;
Kazuhiro Ohyoshi, Wako, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image forming apparatus such as a copier with a detachable process cartridge is provided with a first memory for storing the number of copying operations; a count renewing unit for increasing the count of the first memory and a second memory in the process cartridge, at each copying operation, a comparator for comparing the counts in the first and second memories, and a controller for determining a process condition specific to the process cartridge in case the counts do not mutually coincide. The service life of the process cartridge can be more precisely judged, and the process condition can be more appropriately determined for each process cartridge.