| 摘要 |
PROBLEM TO BE SOLVED: To allow a zipper inclined relative to a ridge line of a packing box to be continuously torn so as to make cut edges thereof smooth.SOLUTION: A packing box with a zipper comprises a zipper 11 having many cuts 12 intermittently arranged, where an opening direction of the zipper 11 is inclined relative to a ridge line 10 as a reference. The zipper 11 is constituted of: straight moving parts 13 in which the cuts 12 extend in the opening direction; edge receiving parts 14 that extend in parallel to the ridge line 10 as the reference and in a direction opposite to the opening direction, at a front end side of the straight moving parts 13; inducing parts 15 that extend in a direction orthogonal to the ridge line 10 as the reference at rear end sides of the straight moving parts 13; and curved parts 16 which join the above parts to one another. The edge receiving parts 14 and the inducing parts 15 form sharp angles relative to the straight moving parts 13, the straight moving parts 13 of adjacent cuts 12 are positioned on the same straight line, and extension lines of the inducing parts 15 of the cuts 12 at front side are designed to butt the edge receiving parts 14 of the cuts 12 at a rear side.SELECTED DRAWING: Figure 5 |
