Method for manufacturing a square bottom bag

Details Method for manufacturing a square bottom bag Method for manufacturing a square bottom bag

1978-12-13

1980-10-07

Coan, James F.

B31B 3702

Patent

active

042261724

ABSTRACT:
A method and apparatus for manufacturing a square bottom bag is disclosed herein. The method comprises the steps of driving a web in a first direction and bending the web upon itself across its width as it is driven in the first direction to assume a U-shaped configuration, supporting the main panels of the web in the open U-shaped configuration and folding the side closure forming panels towards one another to an overlapping relationship and securing the side closure panels in the overlapping relationship to form side walls of a bag.

REFERENCES:
patent: 1998904 (1935-04-01), Popov
patent: 2100739 (1937-11-01), Gilfillan
patent: 2166473 (1939-07-01), Lum et al.
patent: 2169638 (1939-08-01), Gilfillan
patent: 2942529 (1960-06-01), Piazze
patent: 3041941 (1962-07-01), Danielzig
patent: 3059547 (1962-10-01), Piazze
patent: 3435736 (1969-04-01), Reiche

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