Foil for closing easily openable packages

Claim 2

A closing foil for forming an openable closure over the mouth of a package of the type wherein a foil is laid over the open mouth of the package and adhered to the package, said closing foil comprising two contacting layers, the interior layer being formed with a weakened tear line of arrow-point-like configuration at the beginning of the tear area, the exterior layer being formed with weakened tear lines extending into said tear area and at least one continuing weakened tear line extending around but spaced inwardly from the periphery of the exterior layer to define one edge of the torn material to be removed, said exterior layer being also formed with a graspable tongue for initiating the tearing, said tongue being defined by cut lines which merge with said weakened lines in the exterior layer, at least one end of said narrow-point-like tear line in the interior layer ending at the continuing weakened line in the exterior layer, the two layers being sealingly adhered to each other such that weakened tear lines in each of said layers are sealingly covered by and adhered to non-weakened parts of the other layer, the part of the exterior layer forming said tongue not being connected to the interior layer.

Claim 3

A closing foil as claimed in claim 1 wherein both ends of the arrow-point-like tear lines in the interior layer end at weakened tear lines in the exterior layer.

Claim 4

A closing foil as claimed in claim 1 wherein all weakened tear lines are cut through the layer in which they are formed.

Claim 5

A closing foil as claimed in Claim 1 wherein each layer comprises metal foil and a coating of weldable plastic, the plastic coatings of the two metal foils facing each other.

Claim 6

A closing foil as claimed in claim 1 wherein the exterior layer is of greater surface extent than the interior layer such that a border of tHe exterior layer extends beyond and around the periphery of the interior layer for attachment of the foil to the edge of the mouth of the package.

Claim 7

A closing foil as claimed in claim 5 wherein said continuing weakened tear line in the exterior layer extends in a closed configuration located inwardly from the periphery of the exterior layer so as to form a completely removable portion, and wherein said interior layer is of such size and configuration as to extend slightly beyond said continuing weakened line but short of the outer periphery of the exterior layer, and wherein said tongue is formed by a cut portion in the exterior layer, the end of one edge of the tongue merging with said continuing weakened line and the other edge of the tongue terminating in a weakened line spaced inwardly from but generally parallel to said continuing weakened line so as to define therebetween the width of at least the beginning of a strip to be torn from both layers, the arrow-point-like weakened tear line of the interior layer ending at one of its ends at said continuing weakened line and at its other end at a weakened line merging with the other edge of said tongue, the two layers being tightly adhered along a narrow path extending slightly to each side of said continuing weakened line and in a broader area encompassing said arrow-point-like weakened line, and the merger areas of the edges of said tongue.