Heating and fixing device with AC zero-cross detection circuit

Details Heating and fixing device with AC zero-cross detection circuit Heating and fixing device with AC zero-cross detection circuit

1995-08-28

1998-09-01

Beatty, Robert

Electrophotography

Diagnostics

Fixing

399 69, 219216, G03G 1520

Patent

active

058024212

ABSTRACT:
A heating and fixing device includes a heater for generating heat upon electric power supply thereto; a zero-cross detection device for detecting a zero-cross point of AC power supplied to the heater; electric power supply control device for controlling the electric power supply to the heater, wherein the electric power supply control device phase-controls the electric power supply to the heater in cooperation with the zero-cross detection device: and an abnormality detection device for detecting abnormality of the AC power in accordance with an output of said zero-cross detection device.

REFERENCES:
patent: 4493984 (1985-01-01), Yamauchi
patent: 4656338 (1987-04-01), Yagasaki et al.
patent: 5367369 (1994-11-01), Nakai et al.

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