Snack food package

Claim 1

A snack food package comprising a stack of frangible, uniformly sized and shaped, chip-type snack food products, a protective liner adapted to support and protect the stack, and an enveloping pouch constructed of a foil laminate having low permeability to vapors and gases and which is resistant to greases and oils, said laminate comprising an inner, heat sealable ply and an outer, high strength ply of thermoplastic material, a pair of transverse lines of weakness formed in said foil laminate by thinning of the outer ply along a line which extends full width near the top of the laminate and which in the formed pouch have their various parts in general alignment, said lines of weakness being spaced a small distance apart, a fin seal extending lengthwise of the pouch and bonding the side edges of the laminate together, a full length pleat formed in a sidewall of the pouch and having an inner fold, said pouch encircling and closely conforming to the lateral periphery of said stack and protective member with the pleat maintained in flat condition, said pouch having transversely extending end heat seals, one closing the bottom of said pouch and another closing the top of said pouch at a location slightly above said lines of weakness, a cut made through the laminate intermediate the lines of weakness and near the end of the top heat seal toward which the inner fold of the pleat faces, and a sealed area around said cut which is adapted to block gas and vapor transmission from the cut in the laminate to the pouch interior.