Patent ID: 8662379

Claim:
A planar format package blank having slits and fold lines along which the package blank is to be folded to form a box shaped package having a top, a bottom opposite the top and two opposite lateral walls connecting the top and the bottom, the package blank further comprising: longitudinal fold lines connecting the top and the bottom with lateral walls on each side of the bottom, a first transverse fold line in each end of the package blank extending through the top, the bottom and the lateral walls, a second transverse fold line in each end of the package blank extending through the bottom only, the second transverse fold line located longitudinally outside of the first transverse fold line in an unfolded state of the package blank, portions of the top, the bottom and the lateral walls producing a shock absorbing package end of double-layered material by folding the package blank double along the first transverse fold line, thus forming an end edge of the package, a portion of the bottom producing an end wall of single-layered material by raising the double-folded package blank along the second transverse fold line, wherein slits made in continuation of the second transverse fold line through the top and lateral walls and not through the bottom define extension portions foldable to extend supportively from both laterally facing ends of the single-layered end wall, one inside of each opposite lateral wall in the folded package, the package blank upon folding thus producing shock absorbing package ends wherein the end wall and double-layered portions of the top, the bottom and the lateral walls are structurally interlocked without bonding means.