Fluid sprinkling – spraying – and diffusing – Processes – Including electrostatic charging
Patent
1994-06-06
1996-07-23
Grant, William
Fluid sprinkling, spraying, and diffusing
Processes
Including electrostatic charging
239 69, 239690, 239691, 239708, B05B 516
Patent
active
055381863
ABSTRACT:
An apparatus for transferring electrically conductive coating material comprises a filling station having a first coupling element connected to a source of the coating material and a shuttle carrying a second coupling element which is movable with respect to the filling station between a paint transfer position in which the coupling elements engage and a neutral position physically spaced from the filling station. The shuttle, in turn, is connected to the reservoir of a piston pump which communicates with one or more air operated or air assist spray guns. A high-voltage power supply is connected to the metal body of the piston pump to charge the electrically conductive coating material immediately before it is supplied to the spray gun. A pneumatic/mechanical control system controls the operation of the shuttle, pump and electrostatic power supply to ensure that a voltage block is maintained between the source of coating material and the electrostatically charged coating material which is discharged from the spray gun.
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Grant William
Nordson Corporation
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