Moisture proof bags provided with blow-in ports and method of ma

Details Moisture proof bags provided with blow-in ports and method of ma Moisture proof bags provided with blow-in ports and method of ma

1977-06-29

1979-01-02

Garbe, Stephen P.

Envelopes, wrappers, and paperboard boxes

File folder or file envelope

Hanging type

229DIG14, B65D 3114

Patent

active

041323475

ABSTRACT:
A bag adapted to be packed with cement or the like by blowing it into the bag through a foldable blow-in port comprises an outer layer of synthetic resin which is impervious to air and moisture and an inner layer of paper bonded to the outer layer by a layer of bonding agent. The surface of the layer of the bonding agent facing the paper layer is provided with a plurality of longitudinal grooves which act as exhaust passages for discharging the air blown into the bag.

REFERENCES:
patent: 2593328 (1952-04-01), Meaker
patent: 2778173 (1957-01-01), Taunton
patent: 3248041 (1966-04-01), Burke

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