| 摘要 |
PROBLEM TO BE SOLVED: To provide a strip-like unsealing structure for a paper-made container such as a paper box which can be neatly torn without peeling even if the structure is provided perpendicular to the direction of fibers of the paper. SOLUTION: The strip-like unsealing structure (10) has two perforated cut lines (1) provided in parallel by a cutting edge on a portion to be opened on the paper box or the like. The shape of one of the cut lines is a lying Y-shape in which one of cut lines (a) at the branch is at the right angle with respect to the lateral cut line (b) and the other cut line (c) makes an angle of 135°from the lateral cut line (b). The cut line directed at the right angle is placed to face outward from the strip, thereby forming an irregular Y-shape. The cut lines in the irregular Y-shape are successively connected in the same direction so that their lateral lines are arranged on the same line via joints (t) interposed. COPYRIGHT: (C)2004,JPO
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