Free-standing thermoplastic bag construction

Details Free-standing thermoplastic bag construction Free-standing thermoplastic bag construction

1981-02-13

1982-10-12

Garbe, Stephen P.

Envelopes, wrappers, and paperboard boxes

Wrapper

Bottle

229 61, B65D 3302

Patent

active

043534970

ABSTRACT:
The present invention relates to thermoplastic bag constructions capable of standing in an open and erect position without the extraneous support means normally employed with such bags. The bag is characterized by having a bottom gusset and heat sealed side seams which form the lateral bag edges. The individual walls of the bottom gusset are sealed to the adjacent bag walls utilizing a plurality of spaced apart vertical heat seals which are arranged in a predetermined pattern whereby when the bag is open the bag bottom assumes an elliptical configuration and is self-supporting as a result of the stiffening effect of the vertical heat seals.

REFERENCES:
patent: 448142 (1891-03-01), Paige
patent: 2086735 (1937-07-01), Neumiller
patent: 2533554 (1950-12-01), Byerly
patent: 2538920 (1951-01-01), Shumann
patent: 3380646 (1968-04-01), Doyen et al.
patent: 3437258 (1969-04-01), Kugler
patent: 3550839 (1970-12-01), Clayton et al.
patent: 3738565 (1973-06-01), Ackley et al.
patent: 3799914 (1974-03-01), Schmit et al.
patent: 3829007 (1974-08-01), Ellison
patent: 4041851 (1977-08-01), Jentsch

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