| 摘要 |
An image formation controlling device controls, on the basis of the width of a recording sheet on which previous image formation has been effected and a detected temperature at the longitudinal end portions of the heater, the heat fixing operation in the next image forming operation, and having an end offset avoiding mode for inhibiting the image forming operation until the detected temperature drops below a preset reference temperature when the width of a recording sheet used in the next image forming operation is broader than the width of the recording sheet on which the previous image formation has been effected and the detected temperature is higher than the reference temperature. Also provided is a performance priority mode for executing the image forming operation without inhibiting the image forming operation during the end offset avoiding mode thereof and the end offset avoiding mode selectively changeable over.
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