Apparatus and method for dispensing electrically conductive coat

Details Apparatus and method for dispensing electrically conductive coat Apparatus and method for dispensing electrically conductive coat

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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