Patent ID: 8333684

Claim:
A method of producing a packaging bag from a multilayered sheet material which can be welded on one side, the method comprising the steps of: providing a front wall, a rear wall, a right-hand side gusset and a left-hand side gusset, and a closure element; welding the two side gussets, the front wall and the rear wall having essentially the same length to one another, wherein the side gussets are connected to the front wall and the rear wall over their entire length but not in the head portion, and wherein the weldable surface is directed towards the interior of the packaging bag; swinging the front wall or the rear wall or both away from the surface of the respective wall; cutting off and removing the cutoff regions of the side gussets; and removing said cutoff regions and following the removal of the cutoff regions, pivoting the rear wall into the original position; placing the closure element in position, and welding to the rear wall and the side gusset; pivoting the front wall into the original position and executing a welding operation in order to connect the front wall and the rear wall partially to one another thereby forming a head portion and bottom portion of the bag, said head portion located opposite the bottom and having an opening which can be closed by the closure element wherein said head portion is part of the front wall and the rear wall.