Fluid sprinkling – spraying – and diffusing – Processes – Including electrostatic charging
Patent
1996-05-15
1998-03-10
Morris, Lesley D.
Fluid sprinkling, spraying, and diffusing
Processes
Including electrostatic charging
239708, 239305, 118629, 427483, B05B 5025
Patent
active
057251509
ABSTRACT:
A method and system for supplying electrically conductive coating materials to an electrostatic dispenser with a parallel arrangement of subsystems selectably coupled to the dispenser by a four-port system voltage blocking valve, which electrically isolates the subsystems. The subsystems each include first and second piston cylinders that alternatingly receive a selected coating material from a corresponding manifold and supply the coating material to the dispenser by a subsystem voltage blocking valve, which isolates the dispenser from the manifold, when coupled to the dispenser. The first and second piston cylinders of each subsystem also alternatingly receive a solvent from the corresponding manifold and direct the solvent to a waste receptacle by a corresponding subsystem voltage blocking valve when the subsystem is not coupled to the dispenser. The solvent removes previously supplied coating material from the non-selected subsystem and readies the non-selected subsystem for supplying a next selected coating material to the dispenser.
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Allen Harold T.
Feldman Edward T.
Howe Varce E.
Kazkaz Ghaffar
McPherson, Jr. Jerry L.
Bech Donald J.
Buckman Thomas W.
Illinois Tool Works Inc.
Morris Lesley D.
O'Brien John P.
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