| 摘要 |
A temperature control method and apparatus for a fixing apparatus, in which a first roll contacting the back surface of a recording sheet and a second roll contacting the front surface of a recording sheet for fixing a recording sheet carrying a toner image are individually equipped with heating mechanism. The temperature control method and apparatus can suppress storage of the rolls with wasteful thermal energy to fix with less thermal energy. For this suppression, a target surface temperature y required for the second roll to reproduce a predetermined fixing property is computed from an actually measured temperature value X of the first roll so that only one of the heating means is driven on the basis of the result of comparison between the target surface temperature y and an actually measured temperature value Y of the second roll.
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