Knock-down storage bin

Claim 1

A STORAGE BIN OPERABLE TO BE STACKED WITH SIMILAR STORAGE BINS, AND BEING FORMED OF, AND OPERATIVE TO BE KNOCKED DOWN TO, A FLAT CREASED PIECE OF STIFF IMPREGNATED PAPERBOARD COMPRISING A BOTTOM WALL AND SIDE WALLS INTEGRAL WITH THE BOTTOM WALL, SAID CRESES BEING FORMED BETWEEN THE BOTTOM WALL AND THE SIDE WALLS, EACH SIDE WALL BEING MOVABLE ABOUT A CREASE TO AND FROM AN UPRIGHT POSITION, TWO REINFORCEMENT RODS OF TRIANGULAR CROSS SECTION SECURED TO EACH SIDE WALL ON THE INTERIOR OF THE STORAGE BIN AND MOVABLE WITH THE SIDE WALLS, EACH REINFORCEMENT ROD BEING DISPOSED NEAR AN UPRIGHT EDGE OF THE SIDE WALL IN SUCH A MANNER THAT THE ADJACENT REINFORCEMENT RODS OF TWO ADJOINING SIDE WALLS IN THE UPRIGHT POSITION COMPLETE A TWO-PIECE CORNER POST OF TRIANGULAR CROSS SECTION HAVING ITS WIDEST SURFACE FACING THE INTERIOR OF THE STORAGE BIN, SAID POSTS IN THE UPRIGHT POSITION SURMOUNTING SAID BOTTOM WALL AND PROJECTING UPWARDLY BEYOND THE CONFINES OF ALL THE SIDE WALLS, A RIGID REINFORCING STRIP DISPOSED ON EACH SIDE WALL ON THE EXTERIOR OF THE STORAGE BIN ADJACENT THE UPPER EDGE OF THE SIDE WALL AND EXTENDING BETWEEN THE TWO CORNER POSTS, AND CONNECTING MEANS OPERABLE FOR RELEASABLY INTERCONNECTING THE TWO REINFORCEMENT RODS FORMING A CORNER POST.