Particle spray apparatus and method

Details Particle spray apparatus and method Particle spray apparatus and method

1994-10-11

1996-12-10

Weldon, Kevin

Fluid sprinkling, spraying, and diffusing

Processes

Including electrostatic charging

239105, 239698, 239705, 239707, B05B 503

Patent

active

055823475

ABSTRACT:
A particle spray apparatus includes a spray gun having a deflector connected with a housing assembly. An electrode arrangement extends from the housing assembly into the deflector and is exposed to the flow of air with particles entrained therein to electrostatically charge the particles. The electrode arrangement is exposed to a flow of fluid to remove contaminants which may accumulate around components of the electrode arrangement. Accumulation of particles on an end surface of the deflector is discouraged by a flow of fluid from a chamber in the deflector through a porous member. The flow of fluid from the chamber is also conducted through a porous electrode sheet which extends along the porous member. Due to the relatively high voltage conducted through the electrode arrangement, an arc may tend to form in a passage along which fluid is conducted to the electrode arrangement. To prevent this from occurring, the passage through which fluid is conducted to the electrode arrangement is relatively long.

REFERENCES:
patent: 3964683 (1976-06-01), Gimple
patent: 4106697 (1978-08-01), Sickles
patent: 4228961 (1980-10-01), Itoh
patent: 4462061 (1984-07-01), Mommsen
patent: 4819879 (1989-04-01), Sharpless et al.
patent: 4987001 (1991-01-01), Knobbe et al.
patent: 5056720 (1991-10-01), Crum et al.

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