Patent ID: 7368687

Claim:
A heating apparatus comprising: one or more revolving hot members; one or more heating means for heating at least one zonal portion in at least one direction of revolution of at least one of the hot member or members; one or more temperature detection means for detecting at least one temperature of at least one of the heating means; and one or more temperature control means for controlling at least one output of at least one of the heating means based on temperature detection data from at least one of the temperature detection means; wherein taking at least one circumferential speed of at least one of the hot member or members to be v [mm/s]; and taking at least one temperature control delay time of at least one of the temperature control means to be tc [s]; at least one of the temperature detection means is installed L [mm] upstream in at least one direction of revolution of at least one of the hot member or members from at least one heating location of at least one of the heating means; where L=v·tc.