Fluid sprinkling – spraying – and diffusing – Electrostatic type – With automatic safety feature
Patent
1987-07-13
1989-04-11
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Electrostatic type
With automatic safety feature
239698, 239707, 239708, B05B 502
Patent
active
048198790
ABSTRACT:
An electrostatic particle spray gun having, in one preferred embodiment, a conical deflector of insulative material mounted in the nozzle in the particle path for forming a conical particle spray pattern. A resistive sheet connected to a high voltage electrostatic supply is sandwiched between the forward and rearward ends of the deflector, leaving only the perimeter of the sheet exposed at the peripheral region of the conical deflector. The perimeter of the resistive sheet functions as a multi-point circular electrode for charging the particles such that improved coating transfer efficiencies are achieved. Also, because of the resistive nature of the resistive sheet, the sheet constitutes a resistor in the electrical current path between the center of the sheet where it connects to a high voltage terminal and the circular periphery of the sheet which serves as the multiple point charging electrode, thereby minimizing unsafe electrical discharges should the electrode inadvertently approach a grounded object.
REFERENCES:
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patent: 3086711 (1963-04-01), Point
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patent: 3985297 (1976-10-01), Itoh
patent: 4027050 (1977-05-01), Haig
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patent: 4735360 (1988-04-01), Kirchner et al.
Control-A-Cloud Literature, Finishing Show, Cincinnati, OH, Fall 1987.
Crum Gerald W.
Knobbe Alan J.
Sharpless John
White Kenneth A.
Burkhart Patrick N.
Kashnikow Andres
Nordson Corporation
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