Method and device for heater control in drying apparatus

Details Method and device for heater control in drying apparatus Method and device for heater control in drying apparatus

2005-08-02

2005-08-02

Campbell, Thor S. (Department: 3742)

Electric heating

Heating devices

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

C219S482000

Reexamination Certificate

active

06924466

ABSTRACT:
A device and method for controlling a heater of a drying machine is disclosed, which includes a plurality of switches, each switch having a plurality of input terminals being supplied with different input voltages and an output terminal, and each switch connecting any one of the input terminals with the output terminal according to a switching control signal, and a heater connected to the output terminal of each switch and varying its temperature according to the voltage being supplied therein.

REFERENCES:
patent: 3942265 (1976-03-01), Sisler et al.
patent: 4675511 (1987-06-01), Sherrill
patent: 5249255 (1993-09-01), Fuqua et al.
patent: 5329098 (1994-07-01), Howard et al.
patent: 5895597 (1999-04-01), Sherrill
patent: 5925273 (1999-07-01), Sherrill
patent: 7328290 (1995-12-01), None
patent: 9024198 (1997-01-01), None
patent: 1994-0015072 (1994-07-01), None
patent: 1994-0018519 (1994-08-01), None

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