Powder feed device for powder dispensing apparatus

Details Powder feed device for powder dispensing apparatus Powder feed device for powder dispensing apparatus

1978-06-12

1980-01-29

Valenza, Joseph E.

Fluid sprinkling, spraying, and diffusing

Electrostatic type

With fluid entrainment

361213, 406 86, B05B 502

Patent

active

041857836

ABSTRACT:
A powder feed device for supplying a powder dispensing apparatus such as a powder spray gun of an electrostatic powder deposition system. Entrained powder is extracted from a fluidization tank and transported through a half-inch diameter tube or hose to the dispensing apparatus. To prevent clumps of powder and/or powder adhering to the walls of the tube or hose while permitting reduced air flow speed of about 2 to 3 m/s an electric field is provided in the tube or hose and applied by an outer conductor extending around the tube or hose and an inner wire conductor inside the tube or hose extending in the direction of the flow of entrained powder, which conductors are connected across an AC voltage source. The electric field may operate constantly or intermittently.

REFERENCES:
patent: 3048498 (1962-08-01), Juvinall et al.
patent: 3698636 (1972-10-01), Szasz
patent: 3740612 (1973-06-01), Gauthier et al.

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