Semi-erected carton

Claim 1

A CARTON FORMED OF A SINGLE BLANK HAVING RECTANGULAR PANELS FOR FORMING THE FRONT, BACK, END AND BOTTOM WALLS, AND A COVER PANEL HINGED TO THE BACK PANEL, SEALING FLAP EXTENSIONS ON AT LEAST ONE OF SAID BOTTOM AND COVER PANELS, THE END PANELS PROJECTING FROM THE FRONT AND BACK WALLS AND BEING FOLDABLE TO FORM THE ENDS OF THE CARTON, THE PANELS PROJECTING FROM THE BACK WALL BEING FOLDED TO FORM THE INNER LAYERS OF THE END WALLS, THE BOTTOM SEALING FLAPS BEING FOLDED THEREOVER AND THE PANELS PROJECTING FROM THE FRONT CARTON WALL BEING FOLDED OVER BOTH THE BOTTOM SEALING FLAPS AND THE INNER LAYER AND BEING GLUED THERETO, THE PANELS FORMING SAID RESPECTIVE INNER LAYERS EACH HAVING AN ANGULARLY DISPOSED SLIT THEREIN EXTENDING RESPECTIVELY FROM AT LEAST TWO OF THE REAR CORNERS OF THE CARTON, AND THE SEALING FLAPS AT SAID CORNERS EACH HAVING AN EDGE PORTION POSITIONED ADJACENT ONE SIDE OF EACH OF SAID SLITS, THE GLUED SURFACE OF THE OUTER END WALL PANEL CONTACTING THE SURFACE OF ONE OF SAID SEALING FLAPS AND THE SURFACE OF SAID INNER PANEL IN THE SAME PLANE THEREBY FORMING A TIGHT CORNER JOINT.