Spray-coating device

Details Spray-coating device Spray-coating device

1988-07-20

1990-04-10

Leung, Philip H.

Electricity: electrical systems and devices

Electric charging of objects or materials

Particulate matter

361235, H01T 1900

Patent

active

049165712

ABSTRACT:
A spray-coating device for spraying liquid or powdered coating material on articles includes a transformer for stepping up an alternating voltage and a voltage multiplier circuit for converting the output of the transformer to a high DC output for driving a charging electrode in the spray-coating device. The alternating voltage for the transformer is obtained from a controllable source of alternating voltage which produces a sinusoidal voltage whose frequency is constantly adjusted such that the voltage and current flowing through the transformer are in phase with one another. This assures that the transformer is operated at its resonant frequency.

REFERENCES:
patent: 4306271 (1981-12-01), Weber
patent: 4745520 (1988-05-01), Hughey
patent: 4747012 (1988-05-01), Maeba et al.

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