Corrugated cartons having crushrelieved flaps

Claim 1

A CARTON FORMED OF TRIPLE-WALL CORRUGATED PAPER BOARD MATERIAL, SAID CARTON BEING FORMED FORM A BLANK HAVING TRANSVERSE SCORE LINES EXTENDING ALONG ONE SURFACE THEREOF TO FORM THE WALLS FO THE CARTON, LONGITUDINAL SCORE LINES EXTENDING ALONG SAID ONE SURFACE THEREOF, TRANSVERSE SLOTS EXTENDING FROM THE LONGITUDINAL EDGES OF SAID BLANK TO SAID LONGITUDINAL SCORE LINES TO DEFINE THE FLAPS OF THE CARTON AT EACH OF THE OPPOSITE SIDES THEREOF, AND A CRUSHED RELIEF ZONE EXTENDING ALONG SAID ONE SURFACE CONTIGUOUS TO THE SIDE OF EACH LONGITUDINAL SCORE LINE WHICH IS ADJACENT TO SAID FLAPS TO FACILITATE INFORDING OF SAID FLAPS THE PORTION OF THE BLANK CONTIGUOUS TO THE OTHER SIDE OF SAIUD LONGITUDINAL SCORE LINE HAVING A NORMAL THICKNESS OF BOARD MATERIAL, THE EXPSOED BOTTOM PORTION OF SAID CRUSHED RELIEF ZONE BEING DISPOSED BENEATH THE PLANE OF SAID ONE SURFACE OF THE BLANK AND ABOVE THE BOTTOM-MOST PORTION OF SAID LONGITUDINAL SCORE LINE, SAID EXPOSED BOTTOM PORTION BEING BLENDED TOWARD SAID ONE SURFACE ALONG THE AREA OF SAID CRUSHED RELIEF ZONE DISPOSED OPPOSITE TO SAID LONGITUDINAL SCORE LINE.