Packing container for liquid contents

Abstract From the Canadian patent

The invention relates to a packing container which is intended for liquid contents and is of the type which comprises a container body with at least one straight side wall and an upper end wall which ls Joined to the said side wall along a folding line so as to form a relatively sharp transition between the package side and the end wall . The said upper end wall is provided with a hole penetrating the package wall which preferably is of triangular shape and which with one of its points reaches up to the lateral edge betweeD the upper end wall of the package and its side wall . The hole is covered from the inside by a tbin plastic film and from the hole, emanate two diverging perforation …