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:
Mar. 17, 2015
Filed:
May. 02, 2011
Eijiro Atarashi, Toride, JP;
Eijiro Atarashi, Toride, JP;
Canon Kabushiki Kaisha, , JP;
Abstract
An image forming apparatus which can individually detect contact fusion of relays in a circuit configuration in which the relays are connected to respective both ends of a fixing heater. A first relay and a second relay are each connected between a power source and the fixing heater. The presence or absence of an input voltage to the fixing heater is detected on paths from the first relay to the fixing heater and from the second relay to the fixing heater. When the input voltage is detected in a state in which the first relay is on and the second relay is off, it is determined that the second relay has failed. When the input voltage is detected in a state in which the first relay is off and the second relay is on, it is determined that the first relay has failed.