Abstract: The present invention relates to a blank and a box obtained from such a cardboard or corrugated-cardboard blank, comprising a succession of four leaves that are connected together in pairs by first folding lines, specifically two end leaves that are separated by two intermediate leaves, and comprising on each side a set of rectangular flaps. One intermediate leaf comprises at least one opening adjacent to a first folding line joining to an end leaf, the adjacent end leaf comprising, on its peripheral edge opposite the first folding line, at least one tab which has a shape complementary to the opening, is located in line with the opening and is connected to the leaf by a second folding line parallel to the first folding lines.

Abstract: The present invention relates to a blank and a box obtained from such a cardboard or corrugated-cardboard blank, comprising a succession of four leaves that are connected together in pairs by first folding lines, specifically two end leaves that are separated by two intermediate leaves, and comprising on each side a set of rectangular flaps. One intermediate leaf comprises at least one opening adjacent to a first folding line joining to an end leaf, the adjacent end leaf comprising, on its peripheral edge opposite the first folding line, at least one tab which has a shape complementary to the opening, is located in line with the opening and is connected to the leaf by a second folding line parallel to the first folding lines.

Abstract: The invention concerns an impact-absorber device comprising at least one mechanical member absorbing by deformation the energy generated by an impact in a given direction, wherein said member is made from thin plate, having a cross-section in a plane perpendicular to the direction of impact in the shape of at least two triangles each having a common vertex. Applications to rail vehicles, for example.