Structure of a pouring spout for paper box, paper box with spouting opening and manufacturing method of such a spouting opening

摘要

IN ORDER TO MAKE THE STRUCTURE OF THE POURING SPOUT (1) SIMPLE BY THE USE OF A PARTIAL COVERING FILM (11), COVER THE INNER PERIPHERAL SURFACE (4) AROUND THE POURING HOLE (3) OF THE LAMINATE BASE MATERIAL (2) PROPERLY, AND PREVENT THE CONTENTS FROM INFILTRATING INTO THE INNER PERIPHERAL SURFACE AROUND THE POURING HOLE OF THE LAMINATE BASE MATERIAL (2), THE PRESENT INVENTION COMPRISES THE STEPS OF ATTACHING THE INNER WATERPROOF LAYER (7) AND THE PARTIAL COVERING FILM (11) ON THE OUTER WATERPROOF LAYER (6) AT THE PORTION AROUND THE POURING HOLE (3), INSIDE THE POURING HOLE HAVING PENETRATED THROUGH THE LAMINATE BASE MATERIAL AND THE OUTER WATERPROOF LAYER, BORING A POURING SPOUT ON THE ATTACHED PORTION, AND ATTACHING A TAB TAPE (10) TO SAID PARTIAL COVERING FILM IN A WAY CAPABLE OF TEARING OFF, SO TO COVER THE POURING SPOUT. (FIGURE 1 & 3)