Photocopying – Contact printing – Light boxes
Patent
1992-10-08
1993-12-28
Braun, Fred L.
Photocopying
Contact printing
Light boxes
355282, G03G 1520, G03G 2100
Patent
active
052744230
ABSTRACT:
The present invention relates to an image forming apparatus such as a copying machine and the like, and more in particular to the temperature control at a fixing unit thereof. In the image forming apparatus according to the present invention, the temperature of the fixing unit is controlled to be kept at the first set point by the processor in normal operation, and when the temperature of the fixing unit rises to come to reach the second set point as a result of the troubles in the processor, the temperature is made to drop by resetting the processor or by cutting off the current to the fixing unit by the function of the breaking circuit of the current from the power source. Consequently, the temperature of the fixing unit never rises even when the processor gets out of order. As a result, it is possible not only to prevent thermal damages of parts caused by temperature rise at the fixing unit, but also to aim at improving the quality of prints as well as carrying out power saving.
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Braun Fred L.
Minolta Camera Kabushiki Kaisha
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