Closure for box with cantilever support

Claim 1

IN A BOX THAT HAS A TOP FORMED BY A BOTTOM FLAP, AN INTERMEDIATE FLAP COVERING THE BOTTOM FLAP, AND A TOP FLAP COVERING THE INTERMEDIATE FLAP, THE IMPROVEMENT WHICH COMPRISES OPENINGS THROUGH SAID FLAPS WITH A PORTION OF THE AREA OF EACH OPENING IN ALIGNMENT WITH A PORTION OF THE AREA OF EACH OF THE OTHER OPENINGS TO PROVIDE A DISCHARGE OUTLET FOR THE BOX, ALL OF THE OPENINGS EXTENDING ALL THE WAY TO A COMMON SIDE OF THE BOX, A TAB, AT LEAST A PART OF WHICH IS DISPLACED FROM ONE OF THE TWO UPPERMOST FLAPS TO FORM THE OPENING THROUGH THAT FLAP, THE TAB BEING HINGED TO THE FLAP FROM WHICH SAID PART IS DISPLACED AND BEING SUBSTANTIALLY LONGER THAN THE OPENING THROUGH THE BOTTOM FLAP AND BEING HINGED AT A LOCATION BACK FROM THE OPENING THROUGH THE BOTTOM FLAP, THE BOTTOM FLAP HAVING A PORTION BEYOND ITS OPENING AND ADJACENT TO THE HINGED CONNECTION OF THE TAB AND THAT SERVES AS A SUPPORT TO LIMIT DOWNWARD MOVEMENT OF THE TAB WHEN CLOSING THE DISCHARGE OPENING, THE OPENING THROUGH ONE OF THE FLAPS FOR A PORTION, AND ONLY A PORTION, OF THE LENGTH OF THAT OPENING BEING NARROWER THAN IS THE CORRESPONDING PORTION OF THE LENGTH OF THE TAB SO THAT THE SIDE EDGES OF THE TAB JAM AGAINST OR EXTEND UNDER THE EDGES OF THE NARROWER PORTION OF THE OPENING.