Fluid sprinkling – spraying – and diffusing – Electrostatic type – With automatic safety feature
Patent
1998-02-25
1999-06-01
Kashnikow, Andres
Fluid sprinkling, spraying, and diffusing
Electrostatic type
With automatic safety feature
239704, 239708, 118671, 324452, B05B 500, G01N 2760
Patent
active
059081627
ABSTRACT:
A powder spray coating system includes a spray gun for spraying powder in a spray pattern onto a part. The spray gun includes an electrode connected to a power supply, the electrode charging powder as the powder is dispensed from the gun toward the part. A first current sensor measures gun current from the power supply to the electrode. An ABI probe or ion collector is mounted with the gun for collecting free ions produced by the electrode. The collector has a forward portion positioned near the spray pattern and spaced from the electrode. A second current sensor measures return current from the ion collector. A regulating assembly regulates the return current from the ion collecting device. A controller is connected to the first and second current sensors and to the regulating assembly for operating the regulating assembly in accordance with a predetermined setting representing the difference between the gun current and the return current. The system automatically adjusts the position or effective position of the forward tip of the ABI probe relative to tip of the gun as parts of different shapes and geometry pass before the gun.
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Matsushita Electric, Patent Abstracts of Japan, vol. 017., No. 620 (E-1460), Nov. 16, 1993; relating to Japanese Patent Publication No. 05191689, published Jul. 30, 1993.
Crum Gerald W.
Guskov Sergey V.
Klein Richard G.
Kashnikow Andres
Nordson Corporation
O'Hanlon Sean P.
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