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. 22, 2015
Filed:
Oct. 18, 2010
Naoyuki Yamamoto, Kashiwa, JP;
Naoyuki Yamamoto, Kashiwa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An apparatus includes: a coil; a heater, including an electroconductive layer of magnetism-adjusted alloy whose Curie temperature is lower than apparatus's durable temperature; a magnetic core directing a magnetic flux generated by the coil to the heater; a controller controlling electric power supply to the coil so that a temperature of the heater is a temperature sufficient to heat an image on a sheet, the Curie temperature being higher than the image heating temperature; and a blocker of non-magnetic metal having a resistivity smaller than that of the magnetism-adjusted alloy. The blocker opposes the coil with the heater therebetween. The blocker is in a first region where the coil opposes the heater, and a length L2 of the first region and a length L3 of a second region where the heater and blocker oppose each other, both regions measured in a rotational direction of the heater, satisfy L2/2≦L3.