Patent ID: 7268327
Filing Date: 2007-09-11
Classification: H05B

Abstract:
1. A image heating apparatus comprising: a coil for generating magnetic flux; a rotatable heat generation member having a heat generation portion, which generates heat by magnetic flux, for heating an image on a recording material; and movable magnetic flux blocking means for blocking the magnetic flux directed toward said heat generation member from said coil, said magnetic flux blocking means including first and second magnetic flux blocking portions, arranged in a moving direction of said movable magnetic flux blocking means, for blocking, at an end portion of said heat generation member with respect to a rotation axial direction, the magnetic flux directing from said coil toward said heat generation member, wherein a magnetic flux blocking length of said second magnetic flux blocking portion measured in the rotation axial direction is longer than a magnetic flux blocking length of said first magnetic flux blocking portion measured in the rotation axial direction, and a magnetic flux blocking length of said second magnetic flux blocking portion measured in the moving direction is longer than a magnetic flux blocking length of said first magnetic flux blocking portion measured in the moving direction; moving means for moving said magnetic flux blocking means.