Weigh feeder

Details Weigh feeder Weigh feeder

1977-06-06

1980-03-25

Rolla, Joseph J.

Dispensing

Automatic control

Constant weight, volume or pressure control by output

222 63, 198504, 177165, 73DIG1, G01G 1314, G01G 2314

Patent

active

041946499

ABSTRACT:
A digital weigh feeder includes a conveyor belt for transporting material thereon. The conveyor belt has an average tare weight. A digital weight transmitter provides at least first and second outputs having first and second frequencies respectively. The ratio of the first and second frequencies is indicative of the weight of material on the belt. A weight processor digitally computes a scaled ratio of the first and second frequencies. An auto tare circuit digitally computes the average tare weight of the conveyor belt. The computed average tare weight is substracted from the computed scaled ratio of the first and second frequencies to obtain a reading of the actual weight of material on the belt.

REFERENCES:
patent: 3390731 (1968-07-01), Schierbeek
patent: 3621713 (1971-11-01), Wirth et al.
patent: 3724720 (1973-04-01), Bullivant
patent: 3888321 (1975-06-01), Wiiki et al.
patent: 4071102 (1978-01-01), Van Ostenbridge et al.

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