Electrogasdynamic coating device having composite non-conductive

Details Electrogasdynamic coating device having composite non-conductive Electrogasdynamic coating device having composite non-conductive

1975-07-16

1977-04-26

Envall, Jr., R. N.

Electricity: electrical systems and devices

Electric charging of objects or materials

Particulate matter

239 15, B05B 500

Patent

active

040203930

ABSTRACT:
Apparatus for applying powdered coating materials includes a channel portion wherein the powder coating material is passed around a conduit which delivers an air jet to the powder material, and where the powder material is ionized, and then forced through an outlet channel. The latter is made of nonconductive material, and includes a non-conductive insert disposed in the channel, with the dielectric constant of the insert being different from the dielectric constant of the material of the remainder of the channel. The ionized powder is directed by gas pressure through the channel toward a grounded object to be coated. The ionization electrode within the apparatus is hollow and an air jet is passed therethrough to aid in the dispersion of the powdered coated material.

REFERENCES:
patent: 3740612 (1973-06-01), Gauthier et al.
patent: 3757491 (1973-09-01), Gourdine
patent: 3903321 (1975-09-01), Schaad

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