Dispensing – With conveying conduit jacket and/or inert atmosphere...
Patent
1980-11-25
1987-05-26
Rolla, Joseph J.
Dispensing
With conveying conduit jacket and/or inert atmosphere...
2224021, 53403, 53432, 53470, 141 3, 141 20, B65B 3100
Patent
active
046678557
ABSTRACT:
Valves connected to dip tubes in conventional pressurized "aerosol"-type containers for dispensing materials which react or cure upon dispensing (e.g. moisture-curable polyurethanes), are protected against premature failure by introducing a small amount of dry, inert gas into the dip-tube shortly after charging the container. The gas (e.g. nitrogen) acts as a barrier to prevent contact between the product in the container and the valve mechanism prior to use of the product. Preventing such contact avoids premature hardening of product in the valve mechanism caused by reaction of product with moisture.
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patent: 3387425 (1968-06-01), Flanner
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Kirk Othmer, "Encyclopedia of Chemical Technology", 3rd Edition, vol. 3 (1978), pp. 582-587.
Baker William L.
Handren Frederick R.
Rolla Joseph J.
W. R. Grace & Co.
Wasatonic John J.
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