Method and apparatus for electrostatic coating of articles with

Details Method and apparatus for electrostatic coating of articles with Method and apparatus for electrostatic coating of articles with

1986-04-15

1987-11-17

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

Electrostatic type

With electrogasdynamic generator in spray device

239705, 239426, 239524, 361227, B05B 500, B05B 708, B05B 126, H05F 300

Patent

active

047068906

ABSTRACT:
A spraying gun for electrostatic spraying of coating material on an article contains a discharge electrode which is disposed entirely outside the region where the coating material flows. The coating material is accelerated through an annularly shaped and axially extending channel in which the coating material is electrically charged by friction between itself and the insulated walls that define the channel. A gas conduit extends from the discharge electrode and reaches into the annular feed channel of the coating material. Location of the gas conduit between the discharge electrode and the feed channel allows the gas flowing in the gas conduit toward the feed channel to serve the dual purposes of preventing coating material from flowing to and settling on the discharge electrode and providing an electrically conductive path through which undesired electrical charges which develop on the walls of the feed channel discharge to the discharge electrode.

REFERENCES:
patent: 3802625 (1974-04-01), Buser et al.
patent: 3903321 (1975-09-01), Schaad
patent: 4004733 (1977-01-01), Law
patent: 4090666 (1978-05-01), Peck
patent: 4316582 (1982-02-01), Kobayashi et al.
patent: 4399945 (1983-08-01), Ruud
patent: 4659019 (1987-04-01), Talacko

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