Abstract: A grounded insulated electrostatic supply tank comprised of a conductive tank that has several liners to fully insulate a waterborn fluid in the tank from ground. The interior of the tank and a sealed lid are coated with an insulating liner. An intermediate lining is placed in the tank and third interior insulating inner liner is inserted in the tank and has a lip that wraps around the upper rim of the tank and is sealed between the lid and the tank. Electrostatic spray equipment is connected to the tank by a coaxial hose having an inner non-conductive hose and preferably, an outer hose that is conductive. Inner non-conductive hose extends through the lid into an insulating teflon pick-up tube that extends to near the bottom of the tank. Depleted waterborn fluid in the tank is grounded after use by a manual probe or by a piston operated automatic grounding system.

Abstract: A side injection plural component spray gun having one or more injector assemblies mounted for injecting a catalyst into a main component at the most forward position of the spray gun. In one embodiment, the injecting assembly has an injection jet connected to the air path for injecting a catalyst into the air stream just before it exits a port for shaping the main component into a fan shaped pattern. The injection jet is constructed to minimize adverse effects on the air stream for shaping the spray pattern. In a second embodiment, dual injection assemblies inject catalyst for delivery through both shaping air ports on either side of the fan shaped pattern of the main component or allows injection of a third component. These embodiments minimize the build-up of catalyst on the walls and passageways of the spray gun minimizing the need for maintenance of the gun and preventing clogging and corrosion of passageways.

Abstract: A system for improving the viscosity of coating materials comprised of coaxial hoses inserted in a coating material supply hose. A heating fluid is continuously circulated through the coaxial hoses to heat a thin film of coating material in the supply hose. The heating fluid, preferably deionized water, heats the coating material to a preselected temperature to provide optimum viscosity for highest coating efficiency. An emulsifier added to the heating fluid improves heat retention and flow rates by improving lubricity. The coaxial hose heating system is connected to the coating material through a coupling and distributor block that allows easy removal for repair, replacement or use without the hose heater.