CORRUGATED PAPERBOARD BOX, SCORELINE FORMING METHOD FOR FORMING SCORELINE IN CORRUGATED PAPERBOARD SHEET, AND SCORELINE FORMING DEVICE FOR FORMING SCORELINE IN CORRUGATED PAPERBOARD SHEET

摘要

Provided is a cardboard box in which it is easy to box products, and that has excellent matching accuracy of flaps. A groove-shaped normal fold line (15), which is obtained by a back liner (2) side being recessed such that an upper flap (11) bends to the inside of a peripheral wall (31), is formed between the upper flap (11) and the peripheral wall (31) of the cardboard box. A groove-shaped reverse fold line (16), which is obtained by a front liner (1) side being recessed such that the upper flap (11) bends to the outside of the peripheral wall (31), is formed parallel to the normal fold line (15) on the upper flap (11) side with respect to the normal fold line (15). A weak fold line (24), which is obtained by the back liner (2) side being recessed, is formed parallel to the reverse fold line (16) opposite the normal fold line (15) so as to sandwich the reverse fold line (16).