Plastic bag construction

Details Plastic bag construction Plastic bag construction

1989-02-01

1990-06-05

Garbe, Stephen P.

Manufacturing container or tube from paper; or other manufacturi

Container making

Pliable container

383 10, 383 35, 383908, 493194, 493926, B31B 164, B31B 4904, B31B 118, B65D 3308

Patent

active

049310330

ABSTRACT:
A method of making plastic bags in an in-line production stream having hand holes reinforced by double ply plastic material in which the molecular orientation of the plastic material extends across the bags and generally parallel to the upper ends of the bags. The method includes forming a longitudinal gusset along the upper ends of the bags in the machine direction of the plastic extrusion, slitting the inner fold line of the gusset, sealing the inner slit ends longitudinally to the adjacent front and back walls of the bags, forming transverse seals to close the side edges of the bags and separating the bags along the transverse seals.

REFERENCES:
patent: 2695646 (1954-11-01), Van Wyk
patent: 3023947 (1962-03-01), McDuffie
patent: 3240420 (1966-03-01), Membrino
patent: 3276672 (1966-10-01), Heimos
patent: 3497130 (1970-02-01), Stahl
patent: 4036116 (1977-07-01), Tetenborg et al.
patent: 4216899 (1980-08-01), Kamp

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