A blank for producing a finished container which is divided into compartments suitable for holding piece items. The blank comprises at least five rectangular panels which can be folded along fault lines to form the container having a bottom, a top, and sides. One of the rectangular panels which forms the top of the container comprises a plurality of folding lines, hexagonal fields, and at least one compartment partition. The fields are formed by a combination of slits and folding lines.

A container formed from an integral piece of corrugated material includes projections extending from its upper side edges, and notches disposed on its lower side edges. The projections of one container are placed and sized to engage the notches of a similar container so that the containers engage when stacked. The engagement of the sides is such that the containers are unlikely to be inadvertently horizontally displaced, and have increased vertical weight bearing strength. The containers are apt for shipping and display cartons stacked on pallets accessed directly by end-user customers. The containers have four-layer sides to further bear vertical forces, to resist inadvertent collapse of the container or a stack of containers, and to increase horizontal rigidity.

A produce container comprises a bottom wall, a pair of opposing side walls, a front wall, and a back wall. The front and back walls are reinforced along their tops by partial rollovers, each of which comprises two flanges--a center flange and a major flange--hingedly attached to the wall being reinforced. Each rollover is formed by first folding the center flange slightly away from the major flange and then folding the major flange downward toward the corresponding wall. Folding the major flange captures the center flange and at the same time forms doubled, indexed stacking tabs whose tops are formed along the axis about which the major flap is folded. The corners where the side walls and front and back walls join are reinforced by corner structures, with the corner structures extending along a portion of each of the joining walls so that the corners are reinforced along each wall with at least two layers of vertically-corrugated paperboard. The corners are further reinforced by shoulders extending across the top of the container at the corners and affixed to the side walls and the front and back walls where they join. The shoulders extend a short distance inward toward the center of the box and, in addition to reinforcing the corners, serve to prevent stacked containers from nesting.

The present invention provides a stackable open-top container for use in shipping, storing and retail display of produce and other articles. The produce container of the present invention contains a bottom wall, two side walls, and two end walls. The concave ledges of the side walls contain curved scores. Each side wall contains two panels, each of which contains a mirrored curved score and two minor flaps. The curved scores cause the side walls to go into tension and create stacking shoulders for other containers. The minor flaps of the side walls surround the end walls to increase structural rigidity.

A stackable produce container is formed from a flat one-piece blank, typically of corrugated paper stock. The container has reinforced corners and is divided into compartments by transverse ribs which provide resistance to bulging under load and when exposed to high humidity.