Patent ID: 7109449
Filing Date: 2006-09-19
Classification: G03G,H05B

Abstract:
1. A heating apparatus, comprising: magnetic field generating means for generating an alternating magnetic field; a rotatable member disposed in the alternating magnetic field and capable of generating heat at a part with respect to a circumferential direction by electromagnetic induction; temperature detecting means for detecting a temperature of said rotatable member; comparison means for comparing an output of said temperature detecting means with a target temperature; and control means for controlling electric energy supply to said magnetic field generating means on the basis of a comparison result of said comparison means, wherein in at least one period during a stand-by state, said control means controls the electric energy supply to said magnetic field generating means while said rotatable member does not rotate, and in an image forming operation, said control means controls the electric energy supply to said magnetic field generating means on the basis of comparison between the target temperature and an average value of temperatures detected at circumferentially different positions of said rotatable member while said rotatable member is rotating.