Apparatus for fluidized bed-electrostatic coating of indefinite

Details Apparatus for fluidized bed-electrostatic coating of indefinite Apparatus for fluidized bed-electrostatic coating of indefinite

1979-11-14

1981-06-09

Kaplan, Morris

Coating apparatus

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

Electrostatic and/or electromagnetic attraction or...

B05B 502

Patent

active

042717833

ABSTRACT:
An elongate electrical conductor is continuously coated with electrostatically charged powder by passing the conductor upwardly through a tube into the upper portion of a container having a charged fluidized bed of the powder in a lower portion thereof. The tube extends upwardly through the bed and the tube height is adjusted relative to the upper surface of the bed to control the thickness of the powder coating. An array of electrodes having associated switches permits application of uniform coatings to conductors having a variety of shapes. Two or more conductors may be uniformly coated from the same fluidized bed in a container having a baffle which divides the upper portion into two or more compartments and spaced apart tubes extend upwardly into the different compartments.

REFERENCES:
patent: 3248253 (1966-04-01), Barford et al.
patent: 3336903 (1967-08-01), Point
patent: 3496413 (1970-02-01), Goodridge et al.
patent: 3566833 (1971-03-01), Beebe et al.
patent: 3817211 (1974-06-01), Brown et al.
patent: 3865079 (1975-02-01), Kellams et al.
patent: 3916826 (1975-11-01), Knudsen
patent: 4008685 (1977-02-01), Pierce et al.
patent: 4035521 (1977-07-01), Westervelt et al.
patent: 4069792 (1978-01-01), Nethersole et al.

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