EASY OPENING PACKING BAG

PURPOSE: To provide an easy opening packing bag excellent in filling aptitude and largely opened to easily take out content by providing cut tapes with predetermined width to both inner surface layers of the packing bag from the upper end edge of the bag to the lower end edge thereof and tearing the bag along the inside end surfaces of the cut tapes to open the bag. CONSTITUTION: Cut tapes 15, 15a each having a heat-sealable resin laminated to both surfaces thereof are thermally welded to both inner surface layers of a packing bag 10 obtained by heat-sealing a laminated material based on a plastic film from the upper end edge of the bag to the lower end edge thereof. At a time of opening, the packing bag 10 is torn downwardly along the inside end surfaces t, t of the cut tapes 15, 15a to be largely opened. The cut tapes 15, 15a are parallel to the side edge 10a of the packing bag 10 and thermal welding is applied to the part outside the center line S of the packing bag 10. The cut tapes 15, 15a are pref. welded so that the surface side cut tape 15 of the packing bag 10 is slightly shifted to the side end 10a with respect to the rear surface side cut tape 15a thereof.