초록 ▼

A sealed composite container for products is provided having a paperboard body ply with a liner ply adhered on the inner surface thereof. One end of the container is rolled outwardly to form a rim and exposing the inner surface of the liner ply, which comprises a heat sealable composition. A lid for

A sealed composite container for products is provided having a paperboard body ply with a liner ply adhered on the inner surface thereof. One end of the container is rolled outwardly to form a rim and exposing the inner surface of the liner ply, which comprises a heat sealable composition. A lid for the container, also having a layer of heat sealable composition, is placed adjacent to the exposed heat sealable composition of the container liner and heat sealed thereto. The heat seal has both an inner and an outer bead formed on either side of the heat sealed area, wherein the inner bead comprises a larger amount of the heat seal compositions than the outer bead. A method and apparatus for forming the heat seal is also provided.

대표청구항 ▼

[ That which is claimed:] [1.]1. A sealed composite container for products comprising:a tubular body member comprising at least one paperboard body ply and having an inner surface;a liner ply adhered to the inner surface of said tubular body member and comprising a barrier layer, at least one end of

[ That which is claimed:] [1.]1. A sealed composite container for products comprising:a tubular body member comprising at least one paperboard body ply and having an inner surface;a liner ply adhered to the inner surface of said tubular body member and comprising a barrier layer, at least one end of said body member and said liner ply being rolled outwardly to form a rim and exposing said liner ply; anda lid operatively positioned adjacent to said rim and heat sealed thereto, said lid comprising a barrier layer;wherein at least one of said lid and said liner ply further comprises a seal layer comprising a heat sealable composition, said seal layer forming a heat seal between said lid and said liner ply comprising an inner bead formed of the heat sealable composition and facing the interior of the container and an outer bead formed of the heat sealable composition on the opposite side of the heat seal from the inner bead, wherein said inner bead comprises a larger amount of the heat sealable compositions in cross section than said outer bead.