Patent ID: 7279663
Filing Date: 2007-10-09
Classification: G03G,H05B,Y10T

Abstract:
1. A fixing device comprising: a heating roller made of a magnetic metal; a coil which includes a plurality of wires; an exciting circuit that applies a high-frequency current to the coil; and a core which is arranged inside the heating roller; wherein the core has two grooves, each of the grooves being formed on a surface of the core and runs along a longitudinal direction of the core, the two grooves being placed so as to be opposed to each other with the core being sandwiched therebetween in a direction, the direction being perpendicular to the longitudinal direction of the core, and wherein the coil is wound on the surface of the core, and parts of the coil are buried in the two grooves, and wherein two end portions of the coil, which serve as outgoing line portions of the coil going out of and returning to the core, are taken out of the core and attached to each other.