Cutting/sealing device for plastic bag making machines

Details Cutting/sealing device for plastic bag making machines Cutting/sealing device for plastic bag making machines

1982-02-12

1984-05-22

Coan, James F.

Manufacturing container or tube from paper; or other manufacturi

Container making

Pliable container

1565831, 493203, 493470, B31B 164

Patent

active

044499620

ABSTRACT:
A plastic bag making machine of the type consisting of opposing vertically aligned upper and lower machine sections which move in unison toward and away from each other to cut and seal plastic film being conveyed between the two machine sections on a horizontal path possesses three main features. The first feature is a simplified holding and feeding mechanism on each machine section for advancing periodically worn out teflon film without the necessity for manipulating large numbers of screws and other devices. The second feature is that the cutting/sealing device can act on plastic film either in premolded tube form or longitudinally folded form while passing through the machine to produce plastic bags by cutting and sealing either form of film repeatedly. A third feature of the device is the provision of mechanism to prevent and compensate for buckling in two planes of heating and sealing bars on the upper and lower machine sections.

REFERENCES:
patent: 3078201 (1963-02-01), Christie
patent: 3334004 (1967-08-01), Faust et al.
patent: 3470795 (1969-10-01), Davis, Jr.
patent: 3902954 (1975-09-01), Lotto
patent: 3940305 (1976-02-01), Stenberg
patent: 4313781 (1982-02-01), Rovigo

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