Patent ID: 7205512

Claim:
A fixing device using induction heating for causing alternating current to pass through an electromagnetic induction coil, which is arranged so as to be close to an endless member having a metal layer of a conductive material, to cause said endless member to generate heat to heat a member to be fixed, wherein said electromagnetic induction coil comprises a litz wire that includes a plurality of twisted single wires, each of said single wires being a conductor coated by a first insulating coating, and wherein said litz wire which comprises the plurality of single wires is coated by a second insulating coating, wherein a bonding of turns of said electromagnetic induction coil to each other and a bonding of said electromagnetic induction coil to a core to be wound, are carried out by an adhesive material mixed with mica, and wherein a central portion in an axial direction of a thermal load of said endless member, which is heated by said electromagnetic induction coil, is different from a central portion in an axial direction of said endless member.