PLASTIC SHEET WITH FOLDING RULED LINE, ITS PRODUCTION METHOD, FOLDING RULED LINE BLADE, AND PACKAGING CONTAINER USING THE PLASTIC SHEET

摘要

PROBLEM TO BE SOLVED: To easily line a folding rule readily foldable and hardly breaking at the folding part of a plastic sheet. SOLUTION: A folding ruled line 2 is formed by longitudinally and alternately providing a deep groove 3 which is formed by pressing with a flat protrusion such that the tip of a saw blade is cut off and a linear cut-in part 4 cut by the blade tip of a recess between the flat protrusions. The protrusion part of the folding ruled line blade for forming the folding ruled line 2 is formed in a truncated six-sided pyramid form partially cutting the tip portion of the blade having the oblique sides symmetric back and forth from side to side or of the blade comprising the oblique sides and vertical sides. The recess for forming the cut-in part 4 is made to be a dimple between the protrusions. COPYRIGHT: (C)2005,JPO&NCIPI