Closure for flexible receptacle

Details Closure for flexible receptacle Closure for flexible receptacle

1978-01-16

1980-06-24

Sipos, John

Package making

Methods

Forming a cover adjunct or application of a cover adjunct to...

53480, 53483, B65B 712, B65B 5108

Patent

active

042088550

ABSTRACT:
To provide a hermetic seal for flexible receptacles such as plastic bags, pouches, or casings, the outside of the mouth of the receptacle is coated with a cold flowing resin so that when the receptacle is filled and its mouth gathered under pressure the resin will cold flow and fill the voids in the gathered folds. Preferably, the end of the gathered mouth is trimmed and then high pressure is applied to cause the resin to exude from the trimmed end. Next, a forming plunger is used to press the exudate into a smooth surface whereby a fused cap of resin is formed hermetically closing the bag's mouth. As an alternative, a clip or band can be placed around the gathered end under sufficient pressure to case cold flow of the resin thereby sealing the voids.

REFERENCES:
patent: 1044948 (1912-11-01), Ulmer
patent: 1208828 (1916-12-01), Planco
patent: 2346613 (1944-04-01), Rumsey, Jr.
patent: 2543229 (1951-02-01), Chapman
patent: 2628214 (1953-02-01), Pinkney
patent: 2746225 (1956-05-01), Cloud
patent: 3111796 (1963-11-01), Meissner
patent: 3113408 (1963-12-01), Kirkpatrick et al.
patent: 3197938 (1965-08-01), Laloff
patent: 3308936 (1967-03-01), Roland et al.
patent: 3358905 (1967-12-01), Soesbergen
patent: 3620774 (1971-11-01), Ford et al.
patent: 3896067 (1975-07-01), Kosaka et al.

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