Package for material capable of flow

Claim 1

An opening means on a parallelepipedic package for filling material which is capable of flow, having when formed into a container four longitudinal side walls, a bottom and a top transverse end wall (6,6') comprising carrier material (22) such as cardboard, which is coated on exterior and interior sides with plastic material (23, 24), at least one selected side wall having a longitudinal sealing seam (4, 5), and at least one selected end wall having a transverse sealing seam (7) both seams having an outwardly projecting free edge and meeting at a selected corner of the package, said opening means comprising a pouring spout formed at the corner where said selected walls meet by a double-layer triangular flap, one layer connected to the selected side wall by a side base score line and the other layer connected to said selected end wall by an end base score line, said score lines meeting each other at two junctions, the two junctions of said base score lines being connected to the selected corner between said transverse and longitudinal sealing seams by two inclined score lines (12), the interior of said flap communicating between the base lines with the interior of the package, perforated lines (8, 8a, 8b) extending through both layers of the triangular flap adapted to form the opening of said pouring spout, each of the perforated lines beginning at a common starting point (14) in said longitudinal sealing seam between said selected corner and said side base score line to form the front tip (17) of the pouring spout and crossing the inclined score lines and said end base score line and, extending through said transverse sealing seam and terminating at a terminus approximately in the middle of the said one end wall (6, 6'), characterized in that, said transverse sealing seam extends in a continuous straight line along the entire transverse end wall, and between said starting point and said terminus, the perforated line (8, 8a, 8b) has only two straight sections separated by a single bend point (10), said bend point being positioned adjacent the inclined score lines, the section adjoining the starting point being disposed at a first acute angle to the transverse sealing seam, the section adjoining the terminus being at a second acute angle to said transverse seam, which angle is smaller than said first angle, and a continuous cut line (21) is provided at the starting point (14) through the free edge of said longitudinal seam.