Electrostatic spray coating apparatus

Claim 1

AN ELECTROSTATIC SPRAY COATING APPARATUS COMPRISING, A BARREL OF NONCONDUCTING MATERIAL HAVING A BORE THEREIN, SAID BORE DEFINING A COATING MATERIAL CHAMBER AT THE FORWARD END OF THE BARREL; A PLUG IN SAID BORE CLOSING THE REAR OF SAID COATING MATERIAL CHAMER, AND SEALED AT ITS PERIPHERY WITH THE WALL OF THE BORE, AN ELECTRICAL CONDUCTOR PASSING THROUGH THE FORWARD WALL OF THE PLUG, AND A SEAL BETWEEN THE CONDUCTOR AND THE PLUG, SAID PLUG HAVING A RECESS IN THE REAR THEREOF; A CASING OF INSULATING MATERIAL FORMING A HIGH VOLATE CIRCUIT HOUSING CARRYING ELECTROCONDUCTIVE MEANS INCLUDING A RESISTOR AND EXTENDING FORWARDLY THROUGH SAID BORE TO SAID PLUG, SAID HOUSING AND RESISTOR EXTENDING INTO THE RECESS AND BEING SEALED WITH THE PLUG WALL, THE RESISTOR BEING CONNECTED WITH SAID CONDUCTOR; MEANS AT THE FRONT OF SAID BARREL DEFINING A COATING MATERIAL DISCHARGE ORIFICE CONNECTED WITH SAID COATING MATERIAL CHAMBER AND AN ATOMIZING AIR ORIFICE, A PASSAGE CONNECTING SAID ATOMIZING AIR ORIFICE WITH A SOURCE OF AIR AND A SPRAY CHARGING ELECTRODE OPERABLY ASSOCIATED WITH SAID COATING MATERIAL DISCHARGE ORIFICE AND CONNECTED WITH THE RESISTOR BY SAID CONDUCTOR.