Method and apparatus for manufacturing reclosable plastic bags u

Details Method and apparatus for manufacturing reclosable plastic bags u Method and apparatus for manufacturing reclosable plastic bags u

1993-05-21

1995-01-24

Ball, Michael W.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

1563084, 156322, 493194, 493213, 493214, 493927, B31B 190, B32B 3102, B32B 3112, B32B 3126

Patent

active

053839897

ABSTRACT:
A method for manufacturing reclosable plastic bags or packages includes the step of presoftening the complete length of the zipper before it is introduced into the space between two plies of plastic sheet material, which form the sides of the plastic bag or package. The presoftening enables the zipper, which may comprise interlocked male and female profiles, to be fused together and completely flattened when a seal bar clamps thereacross to form a side seal area transverse to the zipper.

REFERENCES:
patent: 4909017 (1990-03-01), McMahon et al.
patent: 4957571 (1990-09-01), Cipolla
patent: 5322579 (1994-06-01), Van Erden

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