| 摘要 |
PROBLEM TO BE SOLVED: To make an opening easily openable for a tissue paper carton for taking out sheets of tissue paper with incision lines surrounded by middle incision lines and incision lines at both ends and provided at the upside of the carton for cutting the opening made easily openable with a small force, and to make the edges of the opening smooth in touching and neat in external appearance without giving any harm to fingers on touching. SOLUTION: Each of middle incision lines A is formed of a double perforation wherein cut parts of inside perforation 3a having narrow intervals between the cut parts and the cut parts of outside perforation 3b provided close to the outside of the inside perforation 3a are arranged in zigzag, and the interior angle between a straight line connecting the end of the cut part of the inside perforation 3a and the end of the cut part of the outside perforation 3b closest to the cut part of the inside perforation and the inside perforation 3a is made to be an obtuse angle.
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