US Patent 7296698 Stackable shelf

A blank for a stackable shelf and the shelf formed from it. The blank comprises a substantially rectangular shelf member having attached walls. Each of the sidewalls has an integral extension which extends into and is detachable from the shelf member. The height of the integral extension is greater than the height of the side wall. Each of the integral extensions has a transverse score line which divides the extension into an upper and a lower section. The height of the lower section is substantially equal to the height of said side wall.