Cardboard box with corners locked by tabs - has outer tab pushed through aperture left by inner tab

摘要

The box is made from cardboard, and the corners are formed by folding a flap in (5) at each end. The ends (3) are folded upwards, perpendicular to the base (1), and the sides (2) similarly erected. Each flap has a tab (8), formed by a U-shaped slit with the four-the side forming a hinge (10). A similar tab (9) is formed in each side, near the corner. When erected, these tabs coincide and the outer tab (9) pushes through the aperture left by the inner tab (8). The assembly is locked by pressing the inner tab back into its aperture (11). The remaining tab is flattened by a top flap (4) folded down.