Method for severing and sealing thermoplastic materials

Details Method for severing and sealing thermoplastic materials Method for severing and sealing thermoplastic materials

1988-11-23

1990-04-03

Weston, Caleb

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156515, B32B 3118

Patent

active

049137611

ABSTRACT:
A process and apparatus for severing and simultaneously sealing a plurality of plies of thermoplastic material to form bags for storing foods therein is provided. A severing and sealing element fabricated from a long range ordered alloy is used. The use of that alloy provides increased element life at higher operating temperatures while significantly reducing odor and off-flavor problems in the bags.

REFERENCES:
patent: 2711779 (1955-06-01), Carland
patent: 4396449 (1983-08-01), Tumminia
patent: 4612165 (1986-09-01), Liu et al.
patent: 4647427 (1987-03-01), Liu

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