Carton having built-in pour spout

Claim 1

IN A CARTON FOR FLOWABLE MATERIAL, AN END WALL COMPRISING A TUCK AND A FLAP DIRECTLY OVER IT, THE TUCK BEING SLIT TO DEFINE A POUR SPOUT FORMED OF A CENTRAL PANEL AND SIDE WALLS, ONE END OF THE CENTRAL PANEL BEING CONNECTED TO THE TUCK ALONG A HINGE LINE, SAID FLAP BEING SLIT TO DEFINE A TONGUE OVERLYING THE CENTRAL PANEL OF THE SPOUT, ONE END OF THE TONGUE BEING CONNECTED TO THE FLAP ALONG A HINGE LINE DIRECTLY OVER THE HINGE LINE OF THE SPOUT, WHEREBY OUTWARD SWINGING MOVEMENT OF THE TONGUE LEAVES AN APERTURE IN THE FLAP THROUGH WHICH THE SPOUT MAY BE SWUNG TO AN OUTWARDLY PROJECTING OPERATIVE POSITION, THE SLITS DEFINING THE TONGUE BEING SHAPED TO DEFINE ALSO A PAIR OF OPPOSED EARS PROJECTING TOWARD EACH OTHER FROM THE SIDES OF SAID APERTURE, SAID EARS BEING POSITIONED IN THE PATH OF MATERIAL FLOWING OUTWARDLY THROUGH SAID SPOUT AND SERVING TO RETARD SAID FLOW.