Method for providing a laminate web with a firm edge strip

Details Method for providing a laminate web with a firm edge strip Method for providing a laminate web with a firm edge strip

1977-02-03

1978-03-21

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156258, 156306, B29D 2310, B32B 3100

Patent

active

040802353

ABSTRACT:
A laminated web comprising an internal base layer of paper faced with external thermoplastic layers is cut longitudinally into a plurality of separate webs each of which is then used in a packaging machine and formed into a tubular configuration with an overlapped edge seam. In order to prevent a "wicking" action at the internal base paper layer located on the inside of the package tube which could take place when the package is filled with a liquid, a mode of cutting the web into the separate strips is utilized wherein one of the plastic outer layers along one edge of each strip projects laterally beyond the edge of the internal paper layer and the edge of the opposite outer plastic layer. When each web is thereafter formed into a tube in the packaging machine by the overlapped seam technique, the laterally projecting edge portion of the plastic layer is then adhered to the adjacent plastic layer thus effectively sealing off the edge of the internal paper layer from the liquid contents of the package.

REFERENCES:
patent: 3488248 (1970-01-01), Long
patent: 3531350 (1970-09-01), Rausing et al.
patent: 3762028 (1973-10-01), Swearingen et al.
patent: 3770540 (1973-11-01), Fuchs et al.

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