Multi-wall bulk pak shipping container

Claim 1

A LOCKED END DRUM-LIKE SHIPPING CONTAINER FREE FROM EXTERNAL STRAPPING AND FORMED FROM FOLDABLE SHEET MATERIAL AND COMPRISING TELESCOPED INNER AND OUTER OPEN ENDED SLEEVES AND IDENTICAL END CLOSURES DISPOSED IN LOCKED ENGAGEMENT WITH EACH END OF THE SLEEVES, THE SLEEVES AND THE END CLOSURES BEING IMMOBILIZED IN FIXED RELATION TO EACH OTHER ONLY BY INTEGRAL COOPERATING MEANS ASSOCIATED WITH THE OUTER SLEEVE AND END CLOSURES AND DISPOSED WHOLLY INTERNALLY OF THE SLEEVES OF THE CONTAINER, THE OUTER SLEEVE INCLUDING A SERIES OF WALL PANELS IN FOLDABLY CONNECTED TUBULAR RELATION AND SECURING END FLAPS FOLDABLY CONNECTED TO BOTH ENDS OF EACH WALL PANEL AND SUBSTANTIALLY COTERMINOUS IN WIDTH THEREWITH, THE SECURING FLAPS INFOLDED IN FLATWISE CONTACTING RELATION TO THE INNER SURFACES OF THE RESPECTIVE WALL PANELS OF THE OUTER SLEEVE WITH THE FREE TERMINAL END EDGES THEREOF DIRECTED TOWARDS THE OPPOSITE ENDS OF THE CONTAINER, THE INNER SLEEVE HAVING END EDGES AND CORRESPONDING IN CONFIGURATION TO THE OUTER SLEEVE WITH END PORTIONS THEREOF DISPOSED INTERIORLY AND IN PARALLEL RELATION TO THE OUTER SLEEVE SECURING FLAPS, THE END CLOSURES EACH HAVING A CLOSURE PANEL WITH SIDE EDGES DEFINED BY SCORE LINES AND CONFORMING TO THE ENDS OF THE OUTER TUBULAR SLEEVE INTERIORLY OF THE INFOLDED SECURING FLAPS OF THE OUTER TUBULAR SLEEVE, SAID CLOSURE PANELS EACH INCLUDING A PLURALITY OF FLANGES HINGED TO THE SIDE EDGES THEREOF AND SUBSTANTIALLY COEXTENSIVE IN WIDTH THEREWITH AND DISPOSED BETWEEN AND IN FLATWISE CONTACTING RELATION TO THE OUTER SLEEVE SECURING FLAPS AND END PORTIONS OF THE INNER SLEEVE, THE CLOSURE PANEL FLANGES HAVING END EDGES DETERMINED BY A FOLD LINE OPPOSITE THE HINGE CONNECTION TO THE CLOSURE PANEL WITH SAID END EDGES DISPOSED INWARDLY OF THE OUTER SLEEVE SECURING FLAP FREE END EDGES LOCKING FLAPS HINGEDLY CONNECTED BY THE FOLD LINE TO THE END EDGES OF THE CLOSURE PANEL FLANGES AND SECURED IN FLATWISE RELATION TO THE OUTER SURFACE OF THE ENDS OF THE CLOSURE FLANGES, SAID LOCKING FLAPS HAVING FREE END EDGES ALIGNED AND IN EDGEWISE ABUTTING RELATION TO THE OUTER SLEEVE SECURING FLAPS FREE END EDGES AND IMMOBILIZING THE END CLOSURE FROM MOVEMENT OUTWARDLY OF THE ENDS OF THE CONTAINER, THE INNER END EDGES OF THE CLOSURE FLANGES BEING DIMINISHED IN WIDTH TO PERMIT INSERTION BETWEEN THE OUTER SLEEVE SECURING FLAPS AND INNER SLEEVE, THE INNER SLEEVE END EDGES EACH BEING IN ABUTTING RELATION TO THE INNER FACE OF THE RESPECTIVE CLOSURE PANEL THEREBY IMMOBILIZING THE END CLOSURES FROM MOVEMENT INWARDLY OF THE CONTAINER.