Abstract: A valve bag and an interconnected series of valve bags is disclosed which have alignment means on the bag. This is shown as a continuous tunnel along a first edge of the interconnected bags for guidance into an automatic bag filling machine, for example, onto a mandrel threading the tunnel. Each bag has a valve formed by overlapping portions of panels of one wall of a bag. Parts of the overlapping portions are sealed together and other parts are left open between two valve side edge lines to form a valve from the overlapping material.

Abstract: A valve bag and a series of interconnected valve bags is disclosed wherein the bag is constructed from first and second walls, with one wall having first and second overlapping panels. The valve is formed between unsealed portions of the overlapping panels, and other areas of the overlapping portions are sealed together. A tunnel is provided along a first edge of the series of bags so that the series may be guided into a bag filling machine. This tunnel is to be threaded by a mandrel to align the series of bags in the bag filling machine. As constructed, the valves in the bags are sealed closed, and only at the filling machine is the tunnel slit open by a cutter to expose the exterior opening of the valve so that the bag may be filled through this valve.