II. CONTROLLING THE FIXING TEMPERATUREA. Controlling the Area of Heating (fixing roller)The upper fixing roller is heated by two heaters: main heater (H1) and sub heater(H2).The copier’s main and sub heaters are halogen lamps with different thermaldistribution characteristics. (Figure 6-201)The surface temperature of the fixing roller is maintained even by varying the periodin which these two heaters are turned ON while at the same time preventing overheatingof the ends.q Main heater (H1) thermal distributionw Sub heater (H2) thermal distributione Upper fixing roller external viewFigure 6-2016-2CHAPTER 6 FIXING SYSTEMCOPYRIGHT © 1997 CANON INC. CANON NP6330 REV.0 MAY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)IntensityIntensityqwe
