Heated roller temperature control system

Details Heated roller temperature control system Heated roller temperature control system

1989-02-24

1989-09-19

Paschall, M. H.

Electric heating

Heating devices

Combined with diverse-type art device

219497, 219494, 340589, H05B 102

Patent

active

048683680

ABSTRACT:
An automatic temperature control system for a heated roller constituting a fixing device. This control system has functions to sense the surface temperature of the heated roller, to compare with the sensed temperature and a target temperature suited for fixing toner image on a paper, and to determine a temperature gradient or a rate of temperature change with respect to time lapse of the heated roller, whereby a heater for heating the heated roller is turned on and off in accordance with the temperature state based on the comparison and the temperature gradient, that is whether the temperature of the heated roller is rising or falling. This temperature control for the heated roller is repeated on the basis of the surface temperature of the heated roller sampled by the system at fixed intervals.

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patent: 4496829 (1985-01-01), Black et al.
patent: 4524264 (1985-06-01), Takeuchi et al.
patent: 4551007 (1985-11-01), Elter

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