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

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, BAG HOLDERS, AND MATERIAL SHUT-OFF VALVES