Method and apparatus for coating articles

Details Method and apparatus for coating articles Method and apparatus for coating articles

1990-10-04

1992-12-22

Lawrence, Evan

Coating processes

Direct application of electrical, magnetic, wave, or...

Electrostatic charge, field, or force utilized

427181, 427185, 427236, 427238, 427239, 427477, 118622, 118630, 118312, 118317, B05D 106, B05D 722, B05B 512

Patent

active

051733250

ABSTRACT:
A method and apparatus for spraying a solid particulate powder onto the interior surface of tubular articles by intermittently pumping the powder from a fluidized bed of powder through a powder supply line containing an intermittently operated venturi pump and air amplifier, as well as a pair of constantly operated air diffusers and an electrostatic charging apparatus. A powder collection shroud adjacent at least one open end of the tubular article has a carefully regulated vacuum applied thereto in order to collect oversprayed powders.

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