Method and apparatus for joining overlapping sheets of thermally

Details Method and apparatus for joining overlapping sheets of thermally Method and apparatus for joining overlapping sheets of thermally

1987-11-13

1990-01-16

Lesmes, George F.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156499, 156574, 156579, B32B 3126, B32B 3100

Patent

active

048941123

ABSTRACT:
A method and apparatus for joining overlapping sheets of thermally sealable material is disclosed. The method includes applying moving pressure to the sheets to define a moving compressed portion on the sheets, inserting heating means between the overlapping sheets and positioning and maintaining the heating means against an upstream face of the moving compressed portion so that the heating means and moving compressed portion move in unison. The sheets are heated by the heating means as such movement in unison takes place to form a liquified interfacial region between the sheets when the sheets are engulfed by the moving compressed portion. The sheets are joined to each other when the liquified interfacial region cools and solidifies. The heating means is sized and configured to cooperate and move in unison with a selected compressing means which compresses and moves the moving compressed portion along the sheets. The heating means is also sized and configured to heat the sheets as such movement in unison takes place so that the opposing surfaces of the sheets liquify to form the liquified interfacial region between the sheets.

REFERENCES:
patent: 2250602 (1941-07-01), Pierce
patent: 2484566 (1949-10-01), Hiller
patent: 2814710 (1957-11-01), Schuetze
patent: 2960592 (1960-11-01), Pierce
patent: 4146419 (1979-03-01), Neidhart
patent: 4238665 (1980-12-01), Tremarco
patent: 4642155 (1987-02-01), Ramsey
patent: 4695335 (1987-09-01), Lyall

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