Anti-contamination valve for powder delivery system

Details Anti-contamination valve for powder delivery system Anti-contamination valve for powder delivery system

1995-11-06

1997-12-23

Czaja, Donald E.

Coating apparatus

Projection or spray type

Applying solid particulate material

118308, 118326, B05C 1900

Patent

active

057003238

ABSTRACT:
A method and apparatus for isolating a portion of a powder delivery system from contamination includes an anti-contamination valve interposed between the discharge outlet of a sieve in the powder delivery system and the inlet to a powder feeder device communicating with one or more spray guns associated with a powder spray booth. The valve is movable between an open position in which powder discharged from the sieve is permitted to flow unobstructed to the powder feeder device, and a closed position which effectively seals or isolates that portion of the powder delivery system downstream from the sieve.

REFERENCES:
patent: 4254936 (1981-03-01), Schuurman
patent: 4710286 (1987-12-01), Mulder
patent: 4836499 (1989-06-01), Steele et al.
NLB Corp. Advertisement for "Posi-Flate" Butterfly Valves, PROCESSING Magazine, Aug. 1995.

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