Straight parallelepiped casing is obtained from sheet of flexible material such as pre-cut and bent cardboard, and hollow parallelepiped and articulated lid are mounted at edges, and two longitudinal fins are also provided

摘要

The straight parallelepiped casing is obtained from a sheet of a flexible material such as pre-cut and bent cardboard. The hollow parallelepiped and an articulated lid are mounted at the edges. The two longitudinal fins are provided, which constitute the side walls, two cross fins that constitute a quadrangular casing. The two longitudinal fins are equipped with two inclined folded lines starting from respective corners of the quadrangular casing that run into each point on the edge of the longitudinal fins.