Electrostatic spray coating apparatus

Claim 1

IN AN ELECTROSTATIC SPRAY COATING APPARATUS OF THE CHARACTER DESCRIBED FOR IMPARTING A COATING OF CHARGED PARTICLES OF A MATERIAL TO AN OBJECT AND HAVING A BODY OF INSULATED MATERIAL, A LIQUID MATERIAL INLET IN SAID BODY AND A GASEOUS PRESSURE FLUID INLET IN SAID BODY, THE COMBINATION WHICH COMPRISES A LIQUID DISCHARGING NOZZLE ON SAID BODY AT THE END THEREOF OPPOSITE END LIQUID INLET, A GASEOUS PRESSURE FLUID DISCHARGING NOZZLE ADJACENT SAID LIQUID DISCHARGING NOZZLE FOR ATOMIZING THE LIQUID DISCHARGING THEREFROM, PASSAGES IN SAID BODY IN FLOW COMMUNICATION WITH SAID LIQUID INLET AND SAID LIQUID NOZZLE AND WITH SAID GASEOUS INLET AND SAID GASEOUS NOZZLE, A SUBSTANTIALLY CUPSHAPED ELECTRICALLY CONDUCTIVE SPRAY NOZZLE FORMED OVER THE ENDS OF SAID LIQUID AND GASEOUS DISCHARGING NOZZLES DEFINING A MIXING CHAMBER FOR SAID ATOMIZED LIQUID PARTICLES AND FOR IMPARTING AN ELECTROSTATIC CHARGE THERETO BEFORE ENTERING THE ATMOSPHERE, AT LEAST ONE RESTRICTED ELECTRICALLY CONDUCTIVE JET ORIFICE IN SAID SPRAY NOZZLE LEADING TO THE ATMOSPHERE FOR PROJECTING THE CHARGED PARTICLES TO THE OBJECT TO BE COATED AND FOR FORMING THE CROSSSECTION OF SAID PROJECTION, AND HIGH TENSION CONDUCTOR MEANS FOR APPLYING SAID ELECTROSTATIC CHARGE TO SAID SPRAY NOZZLE AND SAID JET ORIFICE.