Dispensing spout with rupturable breathing diaphragm and closure therefor

Claim 1

IN A SPOUT-TYPE CONTAINER CLOSURE, A GENERALLY TUBULAR POURING SPOUT OF RESILIENTLY FLEXIBLE MATERIAL FORMED WITH A BORE TERMINATING IN A MOUTH OPENING THROUGH THE OUTER END OF THE SPOUT, A CLOSURE DIAPHRAGM SPACED INWARDLY OF THE SPOUT FROM SAID MOUTH OPENING AND EXTENDING IN A RADIAL PLANE ACROSS SAID BORE, SAID DIAPHRAGM BEING INTEGRAL WITH AND CONSTITUTING A HOMOGENOUS PORTION OF, THE MATERIAL FORMING THE SPOUT, SAID DIAPHRAGM BEING PERIPHERALLY CONNECTED WITH THE INNER WALL OF SAID BORE ALONG A WEAKENED TEAR LINE SPACED INWARDLY OF THE SPOUT FROM ITS MOUTH, SAID WEAKENED TEAR LINE PROVIDED WITH A PLURALITY OF FINE OPENINGS TO PERMIT THE CONTAINER TO BREATHE WHILE SAID CLOSURE DIAPHRAGM REMAINS PERIPHERALLY CONNECTED, A RESILIENTLY FLEXIBLY PULL TAB HAVING A ROOT PORTION CONNECTED WITH SAID DIAPHRAGM CLOSELY ADJACENT SAID WALL AND SAID WEAKENED TEAR LINE, SAID TAB, EXCEPT FOR ITS ROOT PORTION, BEING DISCONNECTED FROM SAID WALL AND SAID DIAPHRAGM, AND HAVING A FREE END NORMALLY PROJECTING OUTWARDLY THROUGH AND BEYOND THE MOUTH OF THE SPOUT, AND BEING NORMALLY DISPOSED AT ANGLE TO SAID DIAPHRAGM AND BEING DISPOSED FOR RESILIENT FLEXING TOWARD SAID RADIAL PLANE OF SAID DIAPHRAGM INTO THE MOUTH OF THE SPOUT, THE RESILIENCY OF THE TAB, UPON BEING RELEASED, CAUSING IT TO RESUME ITS NORMAL POSITION WITH ITS FREE END OUTWARD OF AND BEYOND THE MOUTH OF THE SPOUT.