Dispensing – Automatic control – Constant weight – volume or pressure control by output
Patent
1983-10-28
1986-06-17
Rolla, Joseph J.
Dispensing
Automatic control
Constant weight, volume or pressure control by output
222 63, 198505, 177121, G01G 1112
Patent
active
045951250
ABSTRACT:
An apparatus and method useful for continuously dispensing from a bulk storage bin or silo at a precise weight per unit time nonfree-flowing particulate material. A feeder capable of discharging from the back storage bin or silo a precise volume per unit time of the particulate material is positioned to deposit the material onto the conveyor of a continuous weigh scale which, like the feeder, is driven by variable speed drive motor under the control of a control circuit responsive to changes in bulk density of the particulate material sensed by the weigh scale. There is an adjustable speed ratio driving connection between the feeder and conveyor for causing the conveyor to be driven at a predetermined constant speed with respect to the speed of the feeder, and the control circuit is effective to cause shut off of the apparatus in the event that the bulk density of the particulate material exceeds predetermined minimum or maximum limits. A visual display indicates the cause of such shut down and the need for appropriate adjustment of the speed of the conveyor relative to that of the feeder.
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Pedersen Nils E.
Rolla Joseph J.
Schwalbach Joseph C.
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