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. 12, 2014
Filed:
Feb. 24, 2010
Atsushi Otani, Moriya, JP;
Akihiko Sakai, Abiko, JP;
Keita Takahashi, Abiko, JP;
Hirotaka Seki, Tokyo, JP;
Shoji Takeda, Tokyo, JP;
Satoru Yamamoto, Abiko, JP;
Shigeo Hata, Toride, JP;
Atsushi Otani, Moriya, JP;
Akihiko Sakai, Abiko, JP;
Keita Takahashi, Abiko, JP;
Hirotaka Seki, Tokyo, JP;
Shoji Takeda, Tokyo, JP;
Satoru Yamamoto, Abiko, JP;
Shigeo Hata, Toride, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
This invention provides an image forming apparatus to which a distributed control system is applied and which improves error detection accuracy in each control unit. To accomplish this, the image forming apparatus includes a master control unit which controls the overall image forming apparatus, a plurality of sub-master control units which control a plurality of functions required to implement image formation, and a plurality of slave control units which control loads required to implement the plurality of functions. Each slave control unit includes a monitoring unit which monitors the operation of the other active slave control unit and performs an error diagnosis when the slave control unit is inactive.