Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness
Patent
1979-01-29
1981-09-01
Thibodeau, Paul J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including variation in thickness
5449, 206522, 428178, 428198, B32B 312, B32B 306
Patent
active
042872502
ABSTRACT:
Devices for packaging and/or cushioning products and objects, the devices including permeable elastomeric sheets sealed together at predetermined locations to form separate and discrete chambers, or intercommunicating chambers, inflated initially with a gaseous medium comprising a gas other than air, oxygen or nitrogen which has a very low diffusion rate from each chamber through the elastomeric sheets, ambient air diffusing more readily through the sheets into each inflated chamber to provide a total pressure therein which is the sum of the partial pressure of the air in the chamber and the partial pressure of the gas in the chamber. Not only does the air diffusing into a chamber increase the total pressure therein above the initial inflation pressure of the gas, but the air in the chamber inhibits outward diffusion of the gas from the chamber or compensates for any loss of pressure caused by such outward diffusion of the gas.
REFERENCES:
patent: 2997291 (1961-08-01), Stultz
patent: 3047040 (1962-07-01), Gross
patent: 3366523 (1968-01-01), Weber
patent: 3410004 (1968-11-01), Finn
patent: 3760056 (1973-09-01), Rudy
Bogert Robert C.
Thibodeau Paul J.
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