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. 06, 2016
Filed:
Aug. 27, 2015
Canon Kabushiki Kaisha, Tokyo, JP;
Hideaki Yonekubo, Suntou-gun, JP;
Hisashi Nakahara, Numazu, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A fixing device includes: a rotatable member; a helical coil; a magnetic core; and a controller for controlling the frequency of an AC current caused to flow through the coil. The AC current is caused to flow through the coil to cause an electroconductive layer of the rotatable member to generate heat through electromagnetic induction heating, thereby heating and fixing the toner image on the recording material by heat of the rotatable member. The controller controls the frequency in a period so that when the frequency is f and a resistance of the electroconductive layer with respect to a circumferential direction is R, f/R is substantially constant.