Apparatus for transverse sealing layers of elongated thermoplast

Details Apparatus for transverse sealing layers of elongated thermoplast Apparatus for transverse sealing layers of elongated thermoplast

1984-10-26

1986-04-29

Wityshyn, Michael

Adhesive bonding and miscellaneous chemical manufacture

Surface bonding means and/or assembly means therefor

With stretching or tensioning means

156553, 1565835, 493193, 493205, 493208, B30B 506

Patent

active

045855080

ABSTRACT:
An apparatus for transversely sealing layers of thermoplastic material wherein platen-equipped upper and lower cross bar conveyors are provided for the sealing, there is provided means for jogging the thermoplastic web material incident to heat-up of the platens to prevent scorching of the web and means for stretching the layered web during sealing to overcome the tendency for differential longitudinal shrinkage.

REFERENCES:
patent: 3107585 (1963-10-01), Nystrand
patent: 3147168 (1964-09-01), Bateman
patent: 4198259 (1980-04-01), van der Meulen
patent: 4419167 (1983-12-01), Hay, II et al.

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