Folding box

Claim 1

A FLAT FOLDING BOX OF BUCKLING-STIFF CARD-BOARD MATERIAL AND OF THE KIND TO BE OPENED INTO A RIGHT-ANGLED PARALLELEPIPEDON PACKAGE AND HAVING FOUR PAIRWISE, CONGRUENT AND OPPOSITE ELONGATED SIDE WALL PANELS OF EQUAL LENGTHS HINGED TO EACH OTHER ALONG FOUR PARALLEL LONGITUDINAL SCORE LINES DEFINING THE LONG SIDES OF SAID PANELS, SAID PAIRS OF SAID OPPOSITE SIDE WALL PANELS BEING BROAD AND NARROW RELATIVE TO EACH OTHER, SAID PAIR OF SAID BROADSIDE PANELS BEING INTERCONNECTED ALSO THROUGH AN END WALL PANEL HINGED TO EACH BROAD SIDE PANEL ALONG A TRANSVERSE SCORE LINE DEFINING ONE SHORT SIDE THEREOF, THE LENGTH AND WIDTH OF SAID END PANELS CORRESPONDING TO THE WIDTHS OF THE BROAD-SIDE AND NARROW-SIDE WALL PANELS RESPECTIVELY, THE ADJACENT ENDS OF SAID NARROW-SIDE WALL PANELS AND SAID END WALL PANELS BEING INTERCONNECTED THROUGH CORNER PORTIONS, EACH SAID CORNER PORTION BEING HINGED TO BOTH THE NARROW-SIDE WALL PANEL AND THE END WALL PANEL ALONG THE ENTIRE WIDTHS OF SAID PANELS BY END SCORE LINES DEFINING THE SHORT SIDE OF THE CORRESPONDING PANEL, SAID NARROW-SIDE WALL PANELS AND SAID END WALL PANELS EACH HAVING A CENTRAL SCORE LINE PARALLEL TO THE LONG SIDE THEREOF AND EXTENDING FOR THE ENTIRE LENGTH THEREOF AND ACROSS THE CORRESPONDING SECTION OF THE ADJACENT CORNER PORTION SO THAT SAID NARROW-SIDE WALL PANELS TOGETHER WITH SAID END WALL PANELS AND SAID CORNER PORTIONS ARE OUTWARDLY FOLDABLE UPON THEMSELVES IN AN INSIDE FACE-TOINSIDE FACE MANNER FOR FLAT-FOLDING SAID FOLDING BOX IN A PLANE PARALLEL TO SAID BROAD SIDE WALL PANELS, SAID CORNER PORTIONS BEING EACH PROVIDED WITH TWO DIAGONAL SCORE LINES EXTENDING EACH FROM AN INDIVIDUAL ADJACENT BROAD SIDE WALL PANEL CORNER ACROSS THE CORRESPONDING SECTION OF THE CORNER PORTION, SAID CORNER PORTIONS BEING OUTWARDLY FOLDABLE UPON THEMSELVES ABOUT SAID DIAGONAL SCORE LINES IN AN INSIDE FACE-TO-INSIDE FACE MANNER THEREBY TO PERMIT UNFOLDING OF THE DOUBLE-FOLDED END AND NARROWSIDE WALL PANELS INTO A FLAT STATE WHEN SETTING-UP THE FLAT FOLDING BOX, SAID CORNER PORTIONS ALSO BEING EACH PROVIDED WITH A CENTRAL APERTURE FOR FACILITATING THE DOUBLEFOLDING THEREOF ABOUT SAID DIAGONAL SCORE LINES, AND EACH SAID CENTRAL APERTURE BEING DEFINED BY CUT LINES PARALLEL TO SAID END SCORE LINES.