Dispensing unit and method of producing the same

Claim 1

AN INTEGRAL ONE-PIECE SELF-CLOSING DISPENSING UNIT OF RESILIENT PLASTIC MATERIAL COMPRISING, A CLOSURE WALL HAVING AN INNER SURFACE AND AN OUTER SURFACE AND A DISPENSING OPENING THEREIN, AND A CLOSURE FLAP JOINED INTEGRALLY WITH SAID CLOSURE WALL ALONG ONE EDGE OF SAID DISPENSING OPENING FOR CLOSING SAID OPENING, SAID CLOSURE FLAP BEING ADAPTED TO OCCUPY A FIRST UNSTRESSED POSITION EXTENDING INWARDLY THROUGH SAID DISPENSING OPENING AND BEYOND SAID INNER SURFACE, SAID CLOSURE FLAP ALSO BEING CAPABLE OF BEING FLEXED AND ANGULARLY MOVABLE FROM SAID FIRST POSITION THROUGH SAID DISPENSING OPENING AND TO A SECOND POSITION WHEREIN SAID CLOSURE FLAP CLOSES SAID DISPENSING OPENING, SAID CLOSURE FLAP BEING THEREAFTER ANGULARLY MOVABLE TO A THIRD POSITION EXTENDING OUTWARDLY FROM SAID OUTER SURFACE TO OPEN SAID DISPENSING OPENING, THE MOVEMENT OF SAID CLOSURE FLAP FROM SAID FIRST POSITION TO SAID SECOND POSITION CREATING STRESSES IN SAID RESILIENT PLASTIC MATERIAL URGING SAID CLOSURE FLAP TOWARD SAID SECOND POSITION CLOSING SAID DISPENSING OPENING.