CORRUGATED CARDBOARD SHEET WITH RULED LINE, RULED LIEN DIEING MEMBER, TEMPLATE FOR FORMING RULES AND RULE FORMING DEVICE

摘要

PROBLEM TO BE SOLVED: To ensure that the precise folding process is performed by forming a ruled line almost in parallel with the crest parts of a corrugated core of a corrugated cardboard sheet through squashing it from the face which becomes an inside during folding and forming the ruled line of deep groove parts and shallow groove parts alternately aligned in a straight line. ;SOLUTION: The corrugated cardboard sheet A comprises a corrugated core S2 provided between a first surface liner and a second surface liner S1 and a ruled line (a) for folding which is almost in parallel with the crest parts of the corrugated core S2 and formed by squashing the sheet A from a face which becomes the inside during folding. In addition, the rule (a) is constructed of deep groove parts (a1) and shallow groove parts (a2) alternately aligned in a straight line forming a groove. Thus the liner S1 at the deep groove part (a1) is squashed more deeply than is the liner S1 at the shallow groove part (a2) by making the deep groove parts (a1) and the shallow groove parts (a2) alternately continuous to each other. Thus the space between the deep groove part (a1) and the shallow groove part (a2) is stepped and the deep groove parts (a1) form a perforation pattern as a clear-cut rule (a).;COPYRIGHT: (C)2000,JPO