Fluid sprinkling – spraying – and diffusing – Electrostatic type – Fixed member deflects exiting material
Patent
1979-05-07
1980-10-21
Saifer, Robert W.
Fluid sprinkling, spraying, and diffusing
Electrostatic type
Fixed member deflects exiting material
239707, 239105, 361226, B05B 502
Patent
active
042289610
ABSTRACT:
An electrostatic powder painting gun head in which a needle electrode is provided at a central portion in the proximity of a cylindrical powder ejection port made of insulator, an annular strip electrode is disposed outside of the powder ejection port, also a gas injection port for forming a gas flow layer along the surface of the annular strip electrode is provided, and further there is provided a high voltage power supply for applying a predetermined voltage between the needle electrode and the annular strip electrode. Powder ejected from the powder ejection port can be surely charged by making all the ejected powder cross with a monopolar corona discharge current flowing from the needle electrode towards the annular strip electrode, the powder can be deposited even onto a concave portion of a body to be painted without generating a Faraday cage effect, and also accumulation of charged powder paint particles onto the surface of the annular strip electrode disposed outside of the powder ejection port can be prevented.
REFERENCES:
patent: 3698635 (1972-10-01), Sickles
patent: 4011991 (1977-03-01), Masuda
Onoda Cement Co. Ltd.
Saifer Robert W.
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