Electrostatic rotary atomizing liquid spray coating apparatus

Details Electrostatic rotary atomizing liquid spray coating apparatus Electrostatic rotary atomizing liquid spray coating apparatus

B - Operations, Transporting

05

B

32/16.9

B05B 5/04 (2006.01) B05B 5/03 (2006.01) B05B 5/053 (2006.01) B05B 7/08 (2006.01)

Patent

CA 2003301

Electrostatic liquid spray coating apparatus including a rotary atomizing cup of insulative material driven by in air turbine, is provided with a semi-conductive charging means extending through the cup, the inner portion of which is proximate the inner surface of the cup for contact charging liquid coating material supplied to the rear of the cup as it flows forwardly and outwardly over the rotating cup interior and contacts the changing means prior to atomization at the forward edge of the cup. A generally cylindrical 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 valves for controlling the flow of liquid coating and solvent to the cup. The charging means in the cup is energized via a stationary conductor which terminates in closely spaced proximity to the outer portion of the charging means on the cup exterior which is electrically connected to the inner portion of the charging means on the cup interior via a series of semi-conductive posts which form the portion of the charging means extending throuqh the wall of the cup between its inner and outer surfaces.

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