Electrostatic coating apparatus

Details Electrostatic coating apparatus Electrostatic coating apparatus

1975-09-22

1977-07-26

Stein, Mervin

Coating apparatus

With means to apply electrical and/or radiant energy to work...

Electrostatic and/or electromagnetic attraction or...

118626, 239 15, B05B 504

Patent

active

040375617

ABSTRACT:
An apparatus for electrostatically coating conductive articles with powder. A mixture of powder and air is delivered through a passage of uniform cross-section and a short section of rotating tube to a rotating bell of nonconductive material having a surface angle with the axis of 50.degree. to 90.degree.. The powder is directed from a nozzle over the bell surface and the entraining air is dissipated laterally. The powder is discharged from the bell into an electrostatic field where the particles acquire a charge and are attracted to and deposited on the grounded articles. A pneumatic jet pump for entraining the powder particle in an air stream has a nozzle and venturi so related that the expanding air from the nozzle blends with the expanding portion of the venturi.

REFERENCES:
patent: 2571608 (1951-10-01), Plagge
patent: 2764125 (1956-09-01), Juvinall
patent: 2808343 (1957-10-01), Simmons
patent: 2893894 (1959-07-01), Ransburg
patent: 2961581 (1960-11-01), Grave et al.
patent: 3021077 (1962-02-01), Gauthier
patent: 3048498 (1962-08-01), Juvinall et al.
patent: 3082956 (1963-03-01), Point
patent: 3121024 (1964-02-01), Wampler et al.
patent: 3248606 (1966-04-01), Fraser
patent: 3263127 (1966-07-01), Point et al.

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