THAYER

HOPPER FLOW AID DEVICES - NAMELY, MECHANICAL APPARATUS WHICH VIBRATES, AGITATES OR AERATES BULK MATERIALS TO FACILITATE FLOW; VOLUMETRIC FEEDERS IN THE NATURE OF CONVEYORS - NAMELY, SCREW FEEDERS, [ ROTARY VANE FEEDERS, ] VIBRATORY FEEDERS AND CONVEYOR BELT FEEDERS FOR CONTROLLING THE DELIVERY OF BULK MATERIALS; [ BAG HOLDERS FOR USE IN HOLDING BAGS IN POSITION TO BE FILLED FROM A HOPPER; ] AND MATERIAL SHUTOFF VALVES

BATCH SCALES, WEIGH FEEDERS, BELT SCALES, [ CHECKWEIGHERS - NAMELY, APPARATUS COMPRISING SCALES WITH ASSOCIATED CONVEYORS FOR DETECTING AND RESPONDING TO VARIATIONS FROM SET VALUES IN THE WEIGHTS OF MATERIALS IN CONTAINERS; ] [ BAG AND DRUM FILLING SCALES, ] WEIGHING SCALES AND ACCESSORIES THEREFOR - NAMELY, CONTROLLERS, RECORDERS, PRINTERS, METERS, ALARMS