Bulk shipping container

Claim 1

A bulk package comprising, in combination: an outer box structure formed from a wall-forming blank of material of suitable wall thickness scored to provide a series of walls integrally connected together at hinged corner joints which are spaced successively longitudinally of the blank and having free ends adapted to be connected together at a corner with two of the resulting walls at said ends disposed in angular relationship, means for connecting said walls together at said corner including relatively angularly disposed attaching flanges carried integrally by the respective walls at said corner to which they are connected by corner folds being of substantially the same thickness as said wall and extending outwardly from said folds, bottom closure flaps hinged to the lower free edges of said walls and arranged to close the lower end of said outer box structure, an inner sleeve structure laminated to the interior of said outer box structure and formed from a wall forming blank of material of wall thickness considerably greater than the wall thickness of said outer box structure, said blank forming said inner sleeve being scored to provide a series of walls integrally connected together at hinged corner joints which are spaced successively longitudinally of the blank and have free ends laminated to the interior of the free ends of said outer box structure, one of said attaching flanges integral with one of said box corner walls extending into flat contact with the interior surface of one of said inner sleeve corner walls, and the other of said attaching flanges integral with the other of said outer box structure corner walls extending into overlapping flat contact with the exterior surface of said one of said outer box corner walls to thereby close said corner.