Open loop fuser control

Details Open loop fuser control Open loop fuser control

1980-01-10

1982-07-20

Reynolds, B. A.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219216, 219501, 323299, 323300, H05B 102

Patent

active

043408079

ABSTRACT:
A controller having dedicated fuser circuitry and a processor for controlling the fuser heating element. The dedicated fuser circuitry interconnects an input voltage source to the processor through a low voltage power supply to provide a reference signal and a sample DC voltage signal representative of the input voltage source. The processor provides a digital signal to activate a triac connected to the fuser heating element. The triac, selectively gates the input voltage source across the heating element. A plurality of ranges of digital signals and a plurality of corresponding triac activation rates are provided for variations in input voltage. A digital signal related to a particular value of the input voltage source lies within one of the plurality of ranges determining the particular activation rate of the triac.

REFERENCES:
patent: 3553428 (1971-01-01), McGhee
patent: 3781516 (1973-12-01), Tsilibes et al.
patent: 3878358 (1975-04-01), Barton et al.
patent: 3921058 (1975-11-01), Tanaka et al.
patent: 3961236 (1976-06-01), Rodek et al.
patent: 4093908 (1978-06-01), Evans
patent: 4130753 (1978-12-01), Wade
patent: 4168476 (1979-09-01), Petrizio
patent: 4282422 (1981-08-01), Payne et al.

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