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:
Jan. 17, 2017
Filed:
Oct. 20, 2015
Canon Kabushiki Kaisha, Tokyo, JP;
Munehito Kurata, Boise, ID (US);
Aoji Isono, Naka-gun, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image heating apparatus for heating an image includes a cylindrical rotatable member including an electroconductive layer; a helical coil provided in the rotatable member, the coil having a helix axis extending along a generatrix direction of the rotatable member; a magnetic core provided in the coil and having an end portion; and a controller configured to control a frequency of an AC current supplied to the coil; wherein the image is heated by heat of the rotatable member heated by electromagnetic induction heat generation of the electroconductive layer, wherein the controller sets the frequency to a first frequency corresponding to a size of a recording material, and wherein the controller sets the frequency to a second frequency higher than the first frequency when a print ratio of the image is larger than a predetermined value.