Deaerating valve for bagging pulverulent products

Details Deaerating valve for bagging pulverulent products Deaerating valve for bagging pulverulent products

1978-11-13

1980-08-05

Schmidt, Frederick R.

Fluid handling

Line condition change responsive valves

Direct response valves

137550, 141 65, B65B 126

Patent

active

042157250

ABSTRACT:
A deaerating valve for bagging fluidized pulverulent products into sacks of the open-mouth type. The valve includes a filtering sheet housed on the inside of the sack to be filled, this sheet having a texture and a thickness such that it multiplies the suction effect through the valve and plays the role of a "wick" to drain the air into a large space. The dimensions of the sheet are considerable with respect to those of the deaerating valve; its surface area may attain that of the flat spread-out sack. The invention is useful in the removal of air from impermeable bags designed to receive a micromized pulverulent product.

REFERENCES:
patent: 773876 (1904-11-01), Lorillard
patent: 1977139 (1934-10-01), O'Brien
patent: 2821338 (1958-01-01), Metzger

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