Power supplying apparatus for use in an image forming apparatus

Details Power supplying apparatus for use in an image forming apparatus Power supplying apparatus for use in an image forming apparatus

1998-09-22

2000-05-16

Gaffin, Jeffrey

Electrical transmission or interconnection systems

Plural supply circuits or sources

307 75, 307114, H02J 100

Patent

active

06064124&

ABSTRACT:
In a power supplying apparatus for use in an image forming apparatus, when a first transistor is switched on, a first photo-triac coupler and a first triac switch on so that a fixing heater is powered on. After a predetermined time, a second transistor is switched on. A second photo-triac coupler and a second triac are thereby switched on so that the fixing heater is powered on. The first triac is then switched off. The first triac is connected in series to a resistor, so that when the first triac is switched on but the second triac remains off, the voltage applied to the fixing heater is sufficiently low in comparison with the voltage applied thereto when the second triac is switched on. Therefore, when the fixing heater is powered on by switching on the first transistor to switch on the first triac, a large power surge does not occur. When the second triac is switched on, a large power surge does not occur either since the fixing heater has already been powered on. Occurrence of power surges through the fixing heater is thereby reduced.

REFERENCES:
patent: 4791528 (1988-12-01), Suzuki et al.
patent: 4839698 (1989-06-01), Inuzuka et al.
patent: 5043595 (1991-08-01), Sugiyama
patent: 5285368 (1994-02-01), Ishikawa
patent: 5559660 (1996-09-01), Watson et al.
patent: 5600406 (1997-02-01), Aikawa et al.
patent: 5656187 (1997-08-01), Miyamoto et al.
patent: 5684685 (1997-11-01), Komatsu et al.
patent: 5814978 (1998-09-01), Ida
patent: 5881335 (1999-03-01), Yang

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