Abstract: A carton and a blank for forming same has self-locking end closure flaps which are hingedly coupled to adjacent end edges of the side walls of the carton. Each flap of one pair of opposed end closure flaps has two elongated slots oriented at acute angles relative to the fold line between the respective panel and flap. Each flap of the other pair of opposed end closure flaps has angular side edges oriented at acute angles relative to the fold line between the respective panel and flap and a pair of tabs extending from those angular side edges. When fully assembled, the tabs are received in respective slots and overlie interior surfaces of the one pair of end closure flaps.

Abstract: An octagonal-shaped paperboard bulk bin particularly suited for use with heavy, palletized loads of meat products and the like is formed of alternating, upstanding side panels and corner panels. Each corner panel includes a foldably connected, horizontally disposed rectangular flap which is initially folded inwardly such that each flap is in overlapping relationship to the interior of the bin. An octagonal sheet having slots at opposite corners receives a portion of each corner panel therethrough to provide a bottom for the bin and to rigidify the bin construction during assembly and use.