Charging device with separate pressure and vacuum air flows

Details Charging device with separate pressure and vacuum air flows Charging device with separate pressure and vacuum air flows

1999-05-10

2000-05-30

Pendegrass, Joan

Electrophotography

Internal machine environment

Forced air circulation

361229, G03G 2100, G03G 1502

Patent

active

060700262

ABSTRACT:
A charging device includes a housing defining a chamber, the chamber having a floor, the floor having disposed therein an elongated slot pressure port and a plurality of circular hole vacuum ports. Four air flow conduits are disposed under the chamber floor to provide separate pressure air flows and vacuum air flows through the chamber. These four air flow conduits comprise two pressure conduits and two vacuum conduits. The two pressure conduits and two vacuum conduits are respectively connected at one of their ends by two turn-around connectors. Separate pressure air supply connections and vacuum air supply connections are applied to the respective other ends of the two pressure conduits and two vacuum conduits. As a result, pressure air is applied at both ends of the pressure conduit adjacent to the floor, thus causing pressure air flow through the pressure port and into the chamber. Simultaneously, vacuum air is applied at both ends of the vacuum conduit adjacent to the floor, thus causing vacuum air flow to be extracted from the chamber through the vacuum ports. The pressure air flow and the vacuum air flow combine to provide continuous air flow through the chamber.

REFERENCES:
patent: 3862420 (1975-01-01), Banks et al.
patent: 5128720 (1992-07-01), Creveling
patent: 5170211 (1992-12-01), Haupt et al.

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