Multistep transverse welding process for producing bags from pla

Details Multistep transverse welding process for producing bags from pla Multistep transverse welding process for producing bags from pla

1974-10-17

1976-10-05

Coan, James F.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

93 8R, 93DIG1, 156290, B31B 2306

Patent

active

039837947

ABSTRACT:
A process and a device for producing bags from a strip of thermoplastic material wherein mated layers of foil strip are supplied to serially arranged bonding devices to provide bonded seams extending over the width of the layers at specific intervals corresponding to the width of the bags with said bonding devices being alternated with cooling means to lower the temperature of the bonded areas and thereafter advancing the material to a cutting device designed to separate the bags divided by the bonded seams from the chain of bags produced by the bonding operation.

REFERENCES:
patent: 2320326 (1943-05-01), Avery
patent: 2649674 (1953-08-01), Bartelt
patent: 3552278 (1971-01-01), Guenther
patent: 3553934 (1971-01-01), Johnson et al.
patent: 3692608 (1972-09-01), Risgaard

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