B - Operations – Transporting – 05 – B
Patent
B - Operations, Transporting
05
B
32/16.9
B05B 5/03 (2006.01) B05B 5/04 (2006.01) B05B 5/16 (2006.01) B05B 7/08 (2006.01)
Patent
CA 1284271
ABSTRACT OF THE DISCLOSURE Electrostatic liquid spray coating apparatus including a frusto-conical rotary atomizing cup of insulative material driven by an air turbine, is provided with a ring-shaped semi-conductive charging electrode for contact charging liquid coating material supplied to the rear of the cup as it contacts the electrode prior to atomization at the forward edge of the cup. An insulative support body, housing a turbine and its associated air bearing and cup drive shaft, has a reduced diameter intermediate section which provides an annular cavity in which are located liquid coating and solvent flow control valves. The support body is mounted to a rear bracket by several parallel spaced apart insulative columns, one of which is hollow to accommodate a high voltage insulated cable for energizing the charging electrode via a stationary conductor. A semi-conductive ring on the cup exterior is electrically connected to the ring-shaped charging electrode on the cup interior via a series of semi-conductive pins extending through the wall of the cup between the ring-shaped conductor and charging electrode. A dump valve is mounted on the bracket between the columns.
534978
Knobbe Alan J.
Murphy James C.
Sharpless John
Shuster Donald E.
Wacker Robert L.
Corporation Nordson
Macrae & Co.
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