| 摘要 |
PROBLEM TO BE SOLVED: To easily and beautifully open a packaging box of a wrap-around or side-open system while facilitating the correspondence to material quality by combining one zipper opening part and three perforation parts to connect them so as to take a round. SOLUTION: A zipper opening part 11 is provided in the top surface of a packaging box in the width direction thereof and a perforation part 21 is provided in the bottom surface 20 of the box in the width direction thereof. Further, the end parts 12, 13 of the zipper opening part 11 and the end parts 34, 35 of the perforation part 21 are respectively connected by perforation parts 32, 33. When the packaging box is opened, at first, the zipper opening part 11 is opened and, next, the perforation parts 32, 33 provided in respective length surfaces 30, 31 are opened from the end parts 11, 13 of the zipper opening part 11. Finally, the perforation part 21 provided in the bottom surface 20 is opened. By this constitution, the end parts 12, 13 of the zipper opening part 11 and the end parts 34, 35 of the perforation part 21 can be cut off along the periphery of the packaging box.
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