Westvaco Corporation

Robert A Farrell

Christopher J Parks

Todd H Huffman

Hampton E Forbes, Jr

William R Rigby

Paperboard packaging for non-refrigerated liquid products and for dry products contains a buried polyvinyl alcohol copolymer (PVOH) barrier layer which has a low oxygen permeability particularly at low relative humidity, and outer heat-sealable surfaces which provide good resistance to moisture penetration and a means for fabricating the packaging.

Method for making paperboard packaging containing a PVOH barrier

Paperboard packaging containing a PVOH barrier

A composite material package in the configuration of a fluid confining tray or bowl is fabricated with a corrugated paperboard structural substrate and internally sealed with a blow mold applied film of polymer.

Rigid insulated food tray

A bottle type container is fabricated by blow molding a continuous wall liner of thermoplastic polymer integrally to the interior wall surface of an oppositely matched pair of paperboard cladding jackets. Paperboard cladding jackets respective to each pair are joined substantially edge-to-edge along the meeting seam exclusively by the continuous liner wall lap. For container stability when resting on a flat surface, at least one folded ridge is formed in the bottom edge panel of both jackets.

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Silver Spring, MD, United States of America

Robert A Farrell