Cutlery
Patent
1976-02-03
1977-03-01
Blunk, Evon C.
Cutlery
302 40, 302 52, 302 57, 302 58, B65G 5314
Patent
active
040099121
ABSTRACT:
A pneumatic conveying system for a pulverant, powdery, or liquid product utilizes a high velocity stream of air to create, during normal operation, a zone of negative pressure within a transition chamber into which the product is fed from an inclined chute. The negative pressure condition in the transition chamber tends to suck the product into the air stream. A check valve door on the chute is opened by reason of the negative pressure to allow product feed and is automatically closed to prevent further product feed and blowback resulting from back pressure when the system is blocked. The product may be fed alternately from a pair of tanks of sufficiently small size so that switching from tank to tank occurs less than two minutes apart. The switching is controlled by introduction of low pressure air into one tank at a time which simultaneously closes the product inlet opening into the tank and opens the outlet opening.
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Blunk Evon C.
Nase Jeffrey V.
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