Abstract: A paperboard carton having a self-locking bottom for holding heavy produce and the like which may be made with minimum waste and cutout material. The minor or width flaps have an inwardly folding flap locking segment which, then folded, defines a generally rectangular opening centrally located along the outer edge of the minor flaps. The major or width flaps have a flap locking slit formed therein. An assembly flap hingedly formed in the major flap may be folded inwardly to create an assembly slot along a portion of the flap locking slit.

Abstract: A carton for produce and the like has a bottom closure provided by pairs of major flaps and minor flaps hingedly connected to the carton body side walls and end walls, respectively. The major flaps have L-shaped slots cutout adjacent each end of the major flap, each slot providing a pair of generally perpendicular slot legs with one leg terminating adjacent the hinge line connecting the major flap to a side wall of the carton body and the other leg extending longitudinally of the major flap to provide a locking edge generally parallel to such hinge line with the edge terminating at an end abutment. Each minor flap has a fold line segregating an end portion of the minor flap and a cutout segment disposed centrally along the outer end of such end portion, this segment defining spaced locking corners at its opposite ends with projecting tabs on the end portion disposed laterally of the segment ends.