Parallellepipedic package

Claim 1

A package composed of a flexible, relatively stiff carton material and having a substantially parallelepiped shape comprising side walls provided with upward extensions, the extensions of the front and back walls being brought together and secured along a zone adjacent their upper edges to form a tab extending across the top of the package and beyond the lateral sides thereof, the lateral ends of said tab being folded down so that the front and back extensions form the top of the package, and so that twin-walled triangular flaps are formed extending laterally and outwardly from the top of the package, said flaps being folded downwardly against the outside of the side walls of the package, one of said twin-walled triangular flaps being provided with weakened tear lines adjacent the outer end thereof to permit the end portion of said flap to be removed after raising said flap upwardly, thus providing a pouring spout when the said flap is raised to open the package said weakened tear lines extending from a central point of the inner wall of said flap symmetrically outward to the outer edges of said flap and then obliquely inwardly along the outer wall of said flap toward said tab, said inwardly extending tear lines terminating near the free edge of that portion of said tab which overlies said flap, a vent hole provided in the top of the package and removable means for covering said vent hole, the side walls of the package being flexibly depressed inwardly when the package was filled and sealed so that the level of contents of the package is higher than if the package had vertical walls, whereby when the covering means is removed from the vent hole at least one of the package walls will flex outwardly and the conTents will have a lower level in the package than prior to opening the package and when said flap is raised the end portion thereof may be removed to provide a pouring spout for removing the contents without spillage.