Abstract: A system for package weight control. The system includes a digital for receiving material sufficient in volume to at least equal a desired net weight of product. At least one conveyor is mounted for conveying the material from a like number of feeders disposed at one end of the conveyor to the hopper disposed at the other end of the conveyor. Each feeder may dispense substantially similar volumes of material at spaced locations on each conveyor as the conveyors are advanced through predetermined incremental distances. The accumulated weight of the material on each conveyor belt is measured and a first digital signal representing the accumulated weight is generated and stored by a control. Each new accumulation on each belt likewise is measured and a second ditigal signal and so on representative of the accumulation is generated and stored.

Abstract: Glass tablets which are to be introduced seriatim into an elongated melting chamber of a crucible having orifices for extrusion of glass filaments are stored in a magazine and are fed onto the first section of a first vibrating trough whose sections have different inclinations. The last section of the first trough discharges tablets into the receptacle of a weighing device which accumulates a predetermined number of tablets and thereupon discharges the accumulated batch of tablets onto the first section of a second vibrating trough the last section of which discharges tablets into an elongated hopper registering with the open top of the melting chamber. At least the last section of the second trough is inclined downwardly toward the hopper to such an extent that tablets leaving the preceding section of the second trough are accelerated during travel in the last section and enter the hopper at timely spaced intervals.