Cardboard tray for fruit

Claim 1

A TRAY FORMED FROM A GENERALLY RECTANGULAR BLANK OF MATERIAL COMPRISING A PAIR OF PERIPHERAL ELEMENTS FOLDED AND ERECTED TO FORM PARALLEL SIDE WALLS AND A RECTANGULAR BASE, SAID PERIPHERAL ELEMENTS BEING FOLDED BACK ON THEMSELVES IN FACING RELATION ALONG FOLD LINES PARALLEL TO THE BASE TO FORM SIDE WALLS OF DOUBLE THICKNESS, SAID PAIR OF PERIPHERAL ELEMENTS EACH INCLUDING A PROJECTING END PORTION EXTENDING PERPENDICULARLY FROM THE ERECTED SIDE WALLS TOWARDS A CORRESPONDING END PORTION OF THE OTHER OF THE PAIR OF PERIPHERAL ELEMENTS, EACH SAID END PORTION PARTIALLY INCLUDING PERIPHERAL ELEMENTS FOLDED BACK ON THEMSELVES TO FORM WALLS OF DOUBLE THICKNESS AND A SINGLE THICKNESS OF MATERIAL COMPLETING EACH SAID END PORTION, SAID END PORTIONS FORMING AN END WALL FOR SAID TRAY IN WHICH THE PORTIONS OF SINGLE THICKNESS THEREOF OVERLAP ONE ANOTHER IN FACING RELATION AND TOGETHER WITH THE PORTIONS OF DOUBLE THICKNESS PROVIDE TWO THICKNESSES OF MATERIAL FOR SAID END WALL ALL ALONG THE LENGTH OF THE END WALL, SAID BLANK INCLUDING AN END PANEL EXTENDING FROM THE BASE BEYOND THE END WALL AND COEXTENSIVE IN LENGTH THEREWITH, MEANS SECURING THE SAID OVERLAPPED PORTIONS OF SINGLE THICKNESS AND THE END PANEL TOGETHER IN OPERATIVE POSITION, A PAIR OF WINGS FOLDABLY CONNECTED TO THE UPPER EDGE OF SAID END PANEL, EACH WING INCLUDING A TONGUE HINGED TO THE OUTER EDGE THEREOF, SAID BLANK BEING PROVIDED WITH A SLOT IN THE FOLD LINE DEFINING THE UPPER EDGE OF EACH SIDE WALL, SAID TONGUES EACH BEING ENGAGED IN A CORRESPONDING ONE OF SAID SLOTS WITH THE TONGUES FOLDED DOWNWARDLY RELATIVE TO THE WINGS AND WITH THE END PANEL OVERLYING THE ENTIRE END WALL IN FACING RELATION AND SAID WINGS ARE FOLDED THEREOVER SUCH THAT SAID WINGS ARE PARALLEL TO SAID BASE, SAID TONGUES BEING EFFECTIVE TO SECURE THE END PANEL TO THE SIDE WALLS AND THEREBY CAUSE THE END PANEL TO REINFORCE THE END WALL AND PROVIDE A THIRD THICKNESS OF MATEIAL THEREFOR ALONG THE ENTIRE LENGTH THEREOF.