Patent ID: 7681785

Claim:
A stackable corrugated box made of a foldable corrugated blank, said foldable corrugated blank comprising: a base having a pair of opposed first edges and a pair of opposed second edges; a wall portion extending from each of the opposed first edges of the base, each of said wall portions comprising two parts, one first part being connected to the base by a first fold line, the second part being connected to the first part, each of said first and second parts being provided with flaps beyond a fold line extending substantially perpendicular to the first fold line, each of said first parts also including at least two spaced apart crush and knife cut features capable of flexing out positioned along the first fold line, which function as receptacles for stacking tabs, which flex outward, and which capture the stacking tabs on four sides without requiring the sidewalls to slope inward creating a tapered box; and a side wall portion extending from each of the second edges of the base, each sidewall portion connected to a respective second edge by a side fold line, wherein, when the corrugated box is erected, the side wall portions are folded perpendicular to the base and are connected via the flaps to upwardly directed walls defined by the first and second parts that have been folded perpendicular to said base, said upwardly directed walls being provided with at least two projecting tabs, and wherein, when the corrugated box is stacked on another similar corrugated box, the crush and knife cut features of the first part of the wall portion flex out to allow space for the projecting tabs from the other box placed below, and to capture the projecting tab on four sides without requiring the sidewalls to be sloped inward creating a tapered box.