Cartons

Claim 1

A CLOSED CARTON FOR A LIQUID PRODUCT CONSISTING ESSENTIALLY OF A POLYGONAL BODY OF RIGID, SEALABLE PACKAGING MATERIAL HAVING A CLOSED BOTTOM SEALED WHOLLY WITHIN THE BOTTOM PORTION OF SAID BODY, SUBSTANTIALLY FLAT PARALLEL OPPOSITE SIDES AND ROUNDED CORNERS BETWEEN ADJACENT SIDES DEFINING AN OPEN UPPER END HAVING FREE EDGES OF SINGLE THICKNESS IN THE PLANE OF THE BODY AT THE BOTTOM AND TOP ENDS OF SAID BODY OVER WHICH THE BODY CONTENTS IS POURED; AND A FLANGED UNITARY RIGID CLOSURE LID OF SINGLE THICKNESS FOR SAID UPPER END; SAID TOP CLOSURE LID HAVING A CENTRAL FLAT SECTION OVERLYING SAID UPPER END AND HAVING NO EXPOSED PORTION THEREOF RECESSED WITH RESPECT TO A PLANE DEFINED BY SAID TOP END EDGES, SAID FLANGE OF SAID TOP CLOSURE BEING A CONTINUOUS FLAGE OF SINGLE THICKNESS EXTENDING DOWNWARDLY FROM THE PERIPHERY OF SAID CENTRAL SECTION AND BEING CONTINUOUSLY SEALED TO THE EXPOSED OUTER SURFACE OF SAID UPPER END, SAID CENTRAL SECTION INCLUDING A FOLDABLE FLAP INTEGRAL WITH SAID CENTRAL SECTION AND HINGED ACROSS ONE OF SAID CORNERS, WHEREIN A ROUNDED POURING LIP WILL BE FORMED BY THE SIDE EDGES AND INTERCONNECTING ROUNDED CORNER INCLUDING A PORTION OF THE SINGLE THICKNESS FREE EDGE OF THE BODY, SAID FOLDABLE FLAP HAVING SIDE FLANGES ON OPPOSITE SIDES OF THE POURING CORNER WHICH ARE SEPARABLE FROM THE CLOSURE FLANGE TO BE READILY MOVABLE TO AN OPEN POSITION OF SAID FLAP AND TO SNAP BACK ONTO THE BODY DURING CLOSING DUE TO THE RIGIDITY OF SAID CENTRAL SECTION BEHIND THE CREASE AT THE HINGE.