Electrostatic method for coating redistribution

Details Electrostatic method for coating redistribution Electrostatic method for coating redistribution

1989-11-13

1991-02-05

Lawrence, Evan

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

427 13, 427120, B05D 104

Patent

active

049903594

ABSTRACT:
A method for rendering uniform a coating applied to a substate is provided which redistributes a flowable non-uniformly applied coating with electrostatic forces after the coating has been deposited and before it solidifies. An electrostatic charging station charges the coating which, in the illustrated embodiment, is an insulative dip coating on a running length of rectangular conductive wire, as the wire emerges from a coating tank. The charged coating is passed to a coating redistribution station where shaped charged electrodes positioned to coincide with geometric high or low prints on the wire surface attract or repel coating material to cause it to flow from the more thickly to the more thinly coated regions. The redistributed coating is then dried at a drier station.

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patent: 4606928 (1986-08-01), Dunford et al.

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