Heat sealed paperboard carton having a patterned solvent-based polymer coating on one side only
First Claim
1. A composite material package blank formed from a paperboard web having a barrier coating of a thermoplastic polymer film uniformly applied to an inside surface thereof and an outside surface of said paperboard web is printed with aqueous or solvent based inks and includes selectively positioned areas of a patterned solvent based polymer material applied thereto.
1 Assignment
0 Petitions
Accused Products
Abstract
Folded paperboard food cartons having a barrier polymer coating only on the interior surface and sales graphics on a substantially unplasticized clay coated exterior surface are heat sealed at contiguous areas of overlapping flaps wherein the polymer coated interior surface is in direct contact with a small portion of the clay coated exterior surface or where it is desired to secure together two portions of the clay coated exterior surface. In such heat sealing areas, small and accurately located exterior clay coated carton surface areas are printed with a patterned solvent based polymer material that is precisely applied to such areas by a printing press.
51 Citations
12 Claims
- 1. A composite material package blank formed from a paperboard web having a barrier coating of a thermoplastic polymer film uniformly applied to an inside surface thereof and an outside surface of said paperboard web is printed with aqueous or solvent based inks and includes selectively positioned areas of a patterned solvent based polymer material applied thereto.
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7. A folded paperboard package manufactured from a paperboard web wherein said package is comprised of:
- interior and exterior surfaces and a vessel portion such that said interior surfaces include a coating of a substantially continuous thermoplastic film applied thereto;
said exterior surface having a uniformly calendered coating of mineral particulates supporting respective areas of press applied graphics and a solvent based patterned polymer material; and
, said vessel portion of said package having an interior volume closed by a cover portion such that said cover portion and vessel portion are connected by an integral hinge score and said cover portion being secured at an interior volume closure position by a fuse bond between said areas of pattern-applied solvent based polymer material and said interior surface film. - View Dependent Claims (8, 9, 10, 11, 12)
- interior and exterior surfaces and a vessel portion such that said interior surfaces include a coating of a substantially continuous thermoplastic film applied thereto;
Specification