Liquid and air tight package

Claim 1

A fluid tight container comprising: an outer blank of a stiff material such as cardboard or the like, said outer blank having a plurality of wall panels, each panel having attached thereto a bottom closing flap and a top closing flap; an inner lining of a flexible material such as plastic, metal foil or the like, said lining being laminated over substantially the entire inner surface of said the wall panels and extending longitudinally beyond the outer periphery of said top and bottom closing flaps and including a portion extending laterally beyond the outer periphery of one side edge of the outer blank, this portion also extending laterally beyond the top and bottom closing flaps of the wall panel at said one side edge; the said portion of the lining being folded over said one side edge as well as over the side edges of the top and bottom closing flaps at said one side edge, and attached to the outer side of the outer blank; the inside of the outer blank at the side edge thereof opposite from said one side, including the top and bottom closing flaps located at said opposite side edge, being connected to the folded-over portion of the lining; and each of the portions of the lining located longitudinally beyond the top and bottom closing flaps being sealed together to close that respective end of the container by a flat transverse seal located substantially completely longitudinally beyond its respective closing flaps.