Heating unit, auxiliary power unit, fixing unit, and image...

Details Heating unit, auxiliary power unit, fixing unit, and image... Heating unit, auxiliary power unit, fixing unit, and image...

2006-10-24

2006-10-24

Philogene, Haissa (Department: 2828)

Electrophotography

Control of electrophotography process

Control of fixing

C369S089000, C315S112000, C315S116000, C345S212000

Reexamination Certificate

active

07127189

ABSTRACT:
A main controller controls a capacitor charger to charge a capacitor as necessary. A sub-controller controls a power saving mode and stops a power supply to the main controller when shifting to the power saving mode. A charge control circuit compares a terminal voltage of the capacitor with a predetermined value by a comparator circuit. If the terminal voltage is lower than the reference value, an AND circuit takes a logical product of an output signal of the comparator circuit and a power saving signal indicating the shift to the power saving mode, and outputs a control signal indicating an instruction to charge the capacitor, to the capacitor charger.

REFERENCES:
patent: 4980811 (1990-12-01), Suzuji et al.
patent: 6278103 (2001-08-01), Takami
patent: 6346800 (2002-02-01), Mano et al.
patent: 6741239 (2004-05-01), Iwasaki
patent: 2000-315567 (2000-11-01), None
patent: 2002-304088 (2002-10-01), None
patent: 2002-357966 (2002-12-01), None
patent: 2003-140484 (2003-05-01), None

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