Process for electrostatic coating with pulverized material and a

Details Process for electrostatic coating with pulverized material and a Process for electrostatic coating with pulverized material and a

1979-02-01

1982-03-23

Newsome, John H.

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

118624, 118630, 118634, 118621, 427195, B05B 508, B05D 106

Patent

active

043212816

ABSTRACT:
This invention relates to a process for electrostatically coating a substantially axially symmetrical object with pulverized material, characterized by supporting said object maintained at a temperature below the melting point of said pulverized material in an electrostatic coating chamber having a substantially axially symmetrical shape and equipped with silent discharge plate electrodes on the inside of said chamber; feeding electrically charged pulverized material into said chamber; electrostatically coating said object with said pulverized material by the action of silent discharge from said electrodes; and removing surplus pulverized material from specific parts of said object by suction.
This invention further relates to an apparatus used for electrostatically coating a substantially axially symmetrical object with pulverized synthetic resin, which comprises (i) an electrostatic coating chamber where said pulverized synthetic resin is coated on the surface of said object maintained at a temperature below the melting point of said resin; and (ii) a device for removing surplus pulverized resin from specific parts of said object by suction to electrostatically coat the desired parts only.

REFERENCES:
patent: 2442986 (1948-06-01), Ransburg
patent: 2625590 (1953-01-01), Peeps
patent: 3442251 (1969-05-01), Perkel
patent: 3561135 (1971-02-01), Fulford
patent: 3646909 (1972-03-01), Cole et al.
patent: 3976031 (1976-08-01), Itoh
patent: 3991710 (1976-11-01), Gourdine et al.

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