Dispensing – Automatic control – Delivery from source controlled by quantity in discharging...
Patent
1983-07-22
1985-08-20
Rolla, Joseph J.
Dispensing
Automatic control
Delivery from source controlled by quantity in discharging...
222 63, 222271, 222318, 222413, 198671, 198954, 7386173, G01F 1120
Patent
active
045359156
ABSTRACT:
A main screw feeder having a main screw housing set at an incline from the base of a bin. The main screw housing has two outlets, the advanced outlet and the recycle outlet. The advance outlet communicates with a metering screw housing in which twin screws of identical pitch are rotated in synchronous, intermeshed revolution. The delivery outlet for the metering screw housing communicates with the processing stages. The recycle outlet is positioned at an elevation higher than the advance outlet and discharges to the bin. A flow measuring device measures the return flow of granulated or powdered material expelled from the recycle outlet. The flow measuring device projects a prestressed cable into the recycle path of the return flow. A device for measuring any deflection of the cable and fluctuations in the tension thereon produce a signal which is a function of the return flow and which is used to control the speed of the main screw feeder.
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Rolla Joseph J.
Shaver Kevin P.
The Western Company of North America
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