Chemistry: electrical current producing apparatus – product – and – Having specified venting – feeding or circulation structure – Venting structure
Patent
1980-01-21
1981-03-17
Walton, Donald L.
Chemistry: electrical current producing apparatus, product, and
Having specified venting, feeding or circulation structure
Venting structure
429152, 427411, 296233, H01M 212
Patent
active
042568137
ABSTRACT:
A vent for thin, flat laminar batteries comprising a paper strip enclosed along its length by a gas-permeable, liquid impermeable thermoplastic composition. One or more of the vents can be incorporated into a frame structure which also serves to provide internal and external sealing. For this purpose, the vents are sealed to frames comprising closed loops of thermoplastic material, dimensioned to correspond to the external and internal dimensions of the battery. Methods of making vents comprising the steps of laminating paper with a thermoplastic material and forming the laminate into thermoplastic tubes filled with a paper core.
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Ericson John W.
Polaroid Corporation
Walton Donald L.
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