Electrostatic process for coating electrically conductive object

Details Electrostatic process for coating electrically conductive object Electrostatic process for coating electrically conductive object

1977-06-10

1979-10-02

Smith, Ronald H.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

118621, 118622, 118627, 427 27, 427 33, B05D 106

Patent

active

041699033

ABSTRACT:
The object is electrically charged to have a first polarity. A dispersion in air of powdered coating is similarly charged to have a like, first polarity and is clouded about the object. The metal object is then suddenly provided with an opposite charge to have an opposite, second polarity, whereupon particles from the cloud are uniformly attracted to and deposited on the object. The powder composition and the technique for fusing the deposited powder to provide a continuous coating may be the same as are in current commercial use.

REFERENCES:
patent: 2538562 (1951-01-01), Gustin et al.
patent: 3113037 (1963-12-01), Watanabe
patent: 3376156 (1968-04-01), Whitaker et al.
patent: 3547078 (1970-12-01), Linneborn
patent: 3593678 (1971-07-01), Miller
patent: 3904930 (1975-09-01), Waldron et al.

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