Method and apparatus for coating the interior surface of hollow,

Details Method and apparatus for coating the interior surface of hollow, Method and apparatus for coating the interior surface of hollow,

1989-02-09

1991-01-22

Lawrence, Evan

Coating processes

Electrical product produced

Integrated circuit, printed circuit, or circuit board

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

Patent

active

049870017

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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Frei Ag--catalogue excerpt.
Nordson Corporation--"Tribomatic Powder Spray Gun"--catalogue excerpt (p. 3, duplicated).

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