| 摘要 |
An image forming apparatus includes a fixing portion for fixing an unfixed image formed on a sheet. The fixing portion includes an endless belt, a heater contacting the inner surface of the belt and including first and second heat generators, and a pressor forming a fixing nip with the heater for nipping and feeding the sheet. The apparatus also includes a controller for controlling electric power supplied to the first and second heat generators. The controller controls the first and second heat generators independently from each other. The apparatus sets a plurality of feeding speeds of the sheet, and the controller changes the difference between the times at which electric power is supplied to the first and second heat generators in accordance with the sheet feeding speed.
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