Bottles and jars – Closures – With pressure-responsive valve
Patent
1977-07-05
1978-10-24
Norton, Donald F.
Bottles and jars
Closures
With pressure-responsive valve
215347, 215348, 428 64, 428167, B65D 5116
Patent
active
041217284
ABSTRACT:
This invention is directed to a liner for venting excessive internal pressure of an associated container, the liner including at least two plies of plastic material in which a first ply is formed of impermeable plastic and a second ply is deformable when subjected to a compressive force, the second ply including a plurality of indentations, the material in the areas of the indentations of the second ply are compressively deformed whereas second areas of the second ply are generally uncompressed or less compressed whereby when the liner is associated with a container and closure venting is permitted either through vents formed between a sealing lip of the container and the first or second areas depending upon the axial load of the closure relative to the container as determined by the torque involved in applying the closure to the container.
REFERENCES:
patent: 2265862 (1941-12-01), Rosentreter
patent: 2270714 (1942-01-01), Bellg
patent: 3045854 (1962-07-01), Patton
patent: 3786954 (1974-01-01), Shull
Tagalakis Peter
Woods James K.
Norton Donald F.
Selig Sealing Products
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