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:
Nov. 03, 2015
Filed:
Dec. 12, 2014
Canon Kabushiki Kaisha, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An image heating apparatus, which is configured to heat an image formed on a recording material, includes a cylindrical rotatable member including a conductive layer, and a coil including a helically shaped portion helically wound along a generatrix direction of the rotatable member inside the rotatable member. The coil is configured to produce an alternating magnetic field for causing the conductive layer to generate heat by electromagnetic induction. The image heating apparatus further includes a magnetic core disposed in the helically shaped portion. The magnetic core includes a plurality of divided cores into which the magnetic core is divided in the generatrix direction. The number of turns of the coil per unit length at a region that corresponds to a boundary between the divided cores is larger than the number of turns of the coil at a region that does not correspond to the boundary.