Patent ID: 7082272

Claim:
A fixing apparatus comprising: a heat roller composed of magnetic material; a first control circuit for supplying a current to a first coil for heating the heat roller; a second control circuit for supplying a current to a second coil for heating the heat roller; an IH control circuit for controlling the first and second control circuits; a first temperature sensor for sensing a temperature of a first area of the heat roller, the first area being heated by the first coil; a second temperature sensor for sensing a temperature of a second area of the heat roller, the second area being heated by the second coil; and a host CPU for sending instructions to the IH control circuit for controlling power values to be sent to the first and second coils; wherein the IH control circuit controls the first and second control circuits in accordance with instructions from the host CPU, and wherein the host CPU is arranged so as to determine the power values to the first and the second coils in accordance with outputs from the first and second temperature sensors.