Opening arrangement for packing containers
AssigneeTetra Pak International AB
InventorLars Christer Carlsson
Life of this patent
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Abstract
An opening arrangement for packing containers made from laminated layers of plastics and paper wherein a weakening line is arranged in the wall structure of the container and defines an openable part that extends over an edge line forming the junction between a top and side wall. The weakening line is sealed off from the inside of the container by a cover layer impervious to liquid and which is joined to the inside of the container wall around the weakening line, and a strip of flexible material is located between the container wall and cover layer in such manner that it extends over the edge line to thereby provide a good pouring edge.
Claims7
In a packing container having a first wall and a second wall intersecting along an edge, an opening arrangement comprising a plurality of layers of sheet material, the outer layer having a weakening line extending across said first wall and over said edge and along said second wall in the shape of a lug hinged on said first wall, a cover layer on the interior of the container, and a flexible, resilient, normally flat strip interposed between said outer layer and said cover layer, said strip having a pouring opening therein positioned in said first wall and underlying said lug, said strip projecting over said edge, and seal means between said layers for preventing the discharge of the contents of said container except through said pouring opening when said lug is torn away from said walls along said weakening line.
Dependencies are inferred from the claim text.