Method of making a stand-up plastic bag

Details Method of making a stand-up plastic bag Method of making a stand-up plastic bag

1990-06-05

1992-01-14

Terrell, William E.

Manufacturing container or tube from paper; or other manufacturi

Container making

Pliable container

493189, 1563084, B31B 3764

Patent

active

050806432

ABSTRACT:
An improved method of making a stand-up plastic bag in which the side seam seals are formed at the same time as the gusset wall seals. The method includes the steps of supplying the film, folding the film to form the gusset, simultaneously forming the heat seals for the gusset walls and the side seams at one temperature, forming the heat seals to join the gusset walls together at a higher temperature, and separating the film into completed bags. The improved method provides greater efficiency and increased production rates.

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