Cardboard broadsheet for constructing a stackable box and the box resulting therefrom

Cardboard broadsheet for constructing a stackable box with angular supports consisting of a bottom and four side walls, characterised in that two opposite edges of the bottom (1) are extended by a first transverse strip (3) which is foldable with respect to the bottom (1) of the box and a second transverse strip (4) which is foldable with respect to the first transverse strip (3), each time according to folding lines (5 and 6) extending parallel to above said edges, whereby

• a) the first transverse strip (3) is extended along both its extremities by a wing which results in angular supports by folding each wing according to several parallel lines (11) extending perpendicularly to above said folding lines and resulting in small strips (7-10);
• b) the second transverse strip is extended along both sides of its central portion (13) by a wing consisting of parts (14 and 15) with a folding line (16) in between, resulting in glueing surfaces meant to be glued together, at the one hand with above said central portion, and at the other hand with above said first transverse strip.