Method and apparatus for the production of shear seals in therm

Details Method and apparatus for the production of shear seals in therm Method and apparatus for the production of shear seals in therm

1974-06-19

1976-06-01

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

53 39, 53285, 100226, 156306, 156306, 156583, 264248, 428172, B32B 3100

Patent

active

039606368

ABSTRACT:
A method and apparatus for the production of improved heat seals in thermoplastic materials which includes causing displacement of thermoplastic material in the area being sealed during the sealing operation. The displaced thermoplastic serves to reinforce that area of the seal which is normally weakened as a result of the heat sealing step.

REFERENCES:
patent: 2374504 (1945-04-01), Salfisberg
patent: 3078201 (1963-02-01), Christie
patent: 3405502 (1968-10-01), Badder
patent: 3673041 (1972-06-01), Schulz et al.
patent: 3783156 (1974-01-01), Kuroda

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