7 MACHINES FOR CONVEYING, SPRAYING, DISPENSING OR APPLYING POWDERED COATINGS, LIQUID COATINGS OR ADHESIVE MATERIALS; NAMELY, SPRAY GUNS, APPLICATORS, PUMPS, CONTROL VALVES FOR CONTROLLING THE FLOW OF LIQUID WITHIN FLUID LINES, ELECTRIC, HYDRAULIC AND PNEUMATIC MOTORS, FILTER UNITS FOR REMOVING IMPURITIES FROM LIQUID COATINGS, UNITS FOR MOVING APPLICATOR GUNS WITH RESPECT TO A SURFACE TO BE COATED, HOPPERS FOR HOLDING PARTICULATE POWDER MATERIAL, OVERSPRAY RECOVERY MACHINES, POWDER COLLECTION MACHINES, CONTINUOUS COATING MACHINES, COATING SUPPLY MACHINES, THERMOPLASTIC MATERIAL APPLICATORS, BULK MELTING UNITS FOR MELTING AND DELIVERING LIQUID MATERIAL FROM BULK CONTAINERS TO AN APPLICATOR, COLD GLUE APPLICATORS, CAULK APPLICATORS AND WHEEL APPLICATORS