Carton with tear-open end closure

Claim 1

A PAPERBOARD CARTONU BLANK SUITABLE CUT AND SCORED TO PROVIDE A SERIES OF GENERALLY RECTANGULAR CARTON WALLS HINGEDLY CONNECTED AT THEIR LATERAL EDGES BY PARALLEL SCORE LINES, SAID SERIES INCLUDING FRONT AND REAR WALLS, A PAIR OF SIDE WALLS, AND GLUE PANEL HINGED TO A LATERAL EDGE OF ONE OF SAID WALLS; A FIRST OUTER CLOSURE PANEL HINGEDLY CONNECTED TO ONE OF SAID SIDE WALLS; SECOND OUTER CLOSURE PANEL HINGEDLY CONNECTED TO THE REMAINING SIDE WALLS; SAID FIRST AND SECOND OUTER CLOSURE PANELS EACH HAVING A GENERALLY LONGITUDINALLY DISPOSED LINE OF WEAKNESS EXTENDING SUBSTANTIALLY THE LENGTH THEREOF AND DEFINING A POTENTIAL TEAR PATH THEREIN; SAID FIRST AND SECOND OUTER CLOSURE PANELS, WHEN THE BLANK IS SET UP TO FORM A CARTON, BEING FOLDABLE ABOUT SAID HINGED CONNECTIONS INTO OVERLAPPED AND ADHERED RELATIONSHIP IN THE AREA BETWEEN SAID LINES OF WEAKNESS TO FORM A TEAR STRIP WHEREOF A SUBSTANTIAL PORTION IS OF MULTI-PLY THICKNESS; A FIRST AND A SECONMD INNER CLOSURE PANEL HINGED TO AN EDGE OF SAID FRONT AND BACK WALLS, RESPECTIVELY, AND ALSO EACH HINGELDY CONNECTED ALONG SCORE LINES TO EACH OF SAID OUTER CLOSURE PANELS. EACH OF SAID INNER CLOSURE PANELS HAVING A PAIR OF DIAGONALLY DISPOSED FOLD LINES EACH EXTENDING FROM AN END OF THE HINGE LINE JOINING SAID INNER CLOSURE PANEL WITH A WALL TO A CONVERGENCE POINT ON THE EDGE OF SAID INNER CLOSURE PANEL OPPOSITE SAID LAST-MENTIONED HINGE LINE TO FORM IN SAID INNER CLOSURE PANEL A TRIANGULAR PANEL SECTION AND A PAIR OF ADJACENT TRIANGULAR WING SECTIONS; SAID TRIANGULAR WING SECTIONS BEING FOLDABLE INWARDLY ALONG SAID DIAGONALLY DISPOSED FOLD LINES TO BE POSITIONED BETWEEN SAID TRIANGULAR PANEL SECTION AND SAID OUTER CLOSURE PANELS; SAID FRONT WALL HAVING A LINE OF PERFORATION THEREIN EXTENDING BETWEEN A POINT ADJACENT AN END OF THE LONGITUDINAL WEAKNESS LINE OF SAID FIRST OUTER CLOSURE FLAP TO A POINT ADJACENT THE CORRESPONDING END OF THE LONGITUDINAL WEAKNESS LINE OF SAID SECOND OUTER CLOSURE FLAP AND DEFINING A PUSH-IN OPENING TAB IN SAID FRONT WALL, SAID TAB BEING CONNECTED TO SAID FIRST INNER CLOSURE PANEL ALONG THE HINGE LINE FORMING THE JUNCTION BETWEEN SAID FIRST INNER CLOSURE PANEL AND SAID FRONT WALL.