Bottles and jars – Closures – Frangible member or portion
Patent
1976-09-24
1982-09-07
Norton, Donald F.
Bottles and jars
Closures
Frangible member or portion
215341, B65D 4134
Patent
active
043479391
ABSTRACT:
An improved container closure which is thermoformed from a sheet of two thermoplastic materials, where one of the materials, which constitutes the inner liner of the closure, is an expanded cellular plastic foam.
REFERENCES:
patent: 2423582 (1947-07-01), Coleman
patent: 2990078 (1961-06-01), Fields
patent: 3262625 (1966-07-01), Russell
patent: 3270904 (1966-09-01), Foster
patent: 3310191 (1967-03-01), Kern
patent: 3866845 (1975-02-01), Keeler
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