Photocopying – Contact printing – Light boxes
Patent
1993-01-27
1995-09-05
Grimley, A. T.
Photocopying
Contact printing
Light boxes
219216, 355285, G03G 2100, G03G 1520
Patent
active
054483395
ABSTRACT:
The present invention is aimed at providing a control system for a thermal fixing apparatus having an excellent fixing ability even at an initial stage of a copying process when applied to a high speed copying machine and ensuring a longer life of a surface layer member of the roller, while maintaining the economical benefit derived from the provision of a heater only in a heat roller. The fixing apparatus includes a heater roller 101 and a press roller 102. At least one of the rollers is driven by a motor 103 while in contact with the other so that both rollers are rotated together. A surface temperature of the heater roller 101 is detected by a thermometer 104 and is used for controlling a heating level of a heater 106 by a controller 105. A standby stage controller 110 stops the rotation of the motor 103 if it is determined that the surface temperature of the press roller detected by a thermometer 107 is higher than the upper limit temperature, and outputs a command for rotating the motor 103 if it is determined that the surface temperature of the press roller is lower than the lower limit temperature.
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Hayashi Sei-ichi
Kokaji Norio
Nakagawa Yuuichi
Nishiguchi Mamoru
Yokozawa Michiaki
Grimley A. T.
Iwatsu Electric Co. Ltd.
Lee Shuk Y.
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