| 摘要 |
PROBLEM TO BE SOLVED: To provide a storage box of a wrap film which is excellent in sharpness of a film wherein an initial cut can be made lightly into the film and after once the cut is made, cutting can continuously propagate without stopping. SOLUTION: A virtual line connecting between tips of respective blade tips at a center of a cutting part (k) is linear, and a virtual line connecting between respective blade tips at both ends of the cutting part (k) comprises a plurality of curves or lines inclined toward a bottom plate more gently as they approach both ends of the cutting part (k). In addition, blade edges at both outermost ends protrude by 2 to 15 mm from a position of the blade edge at the center toward the bottom plate 2.
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