PRINTING METHOD ONTO PARTS WHICH, UPON PACKING OF CONTENTS IN FINISHED BAG BODY, BECOME FRONT AND BACK FACES AND BOTH SIDE FACES OF BAG BODY, IN FLAT BAG-MAKING SYNTHETIC RESIN TUBE BODY; AND PRODUCTION METHOD IN WHICH, IN PROCESS OF FORMING BAG BODY BY USING SYNTHETIC RESIN TUBE BODY, FINE HOLES ARE PROVIDED WITHIN SIDE FACE WIDTH OF TUBE BODY

摘要

PROBLEM TO BE SOLVED: To form innumerable fine holes by irradiation with laser light in the process of: while injecting air into a flat bag-making synthetic resin tube body to inflate it, forming prescribed gusset widths in both side faces; then flattening it again; and winding it.;SOLUTION: In a printing method onto parts which, upon packing of contents in a finished bag body, become the front and back faces and both side faces of the bag body, in a flat bag-making synthetic resin tube body, during the production process of the flat bag-making synthetic resin tube body, while creases are put in the body circumferential direction center of a part which becomes one side face in the inflated tube body and the body circumferential direction center of a part which becomes the other side face, and the tube body is flattened again, fine holes are formed in a single row or multiple rows along the longitudinal side face of a tube body 10 by a laser light irradiation device 27 which is arranged in the middle of the process of winding the tube body flattened again in a roll shape.;SELECTED DRAWING: Figure 5;COPYRIGHT: (C)2017,JPO&INPIT