Venting-type closure assembly

Claim 1

A VENTING-TYPE CLOSURE CAP ASSEMBLY FOR SEMI-RIGID CONTAINERS COMPRISING: (A) A CAP HAVING: (1) A CENTRAL PORTION, AND (2) A PERIPHERAL SKIRT EXTENDING DOWNWARDLY FROM THE CENTRAL PORTION AND ADAPTED TO ENCLOSE THE OUTER SURFACE OF THE NECK OF A CONTAINER; (B) AN INSERT FORMED OF A RESILIENT MATERIAL TO BE USED WITH SAID CAP FOR SEALING SAID CONTAINER COMPRISING: (1) A CENTRAL BASE SECTION, THE UPPER SURFACE OF WHICH IS ADAPTED TO SEAT TIGHTLY WITHIN SAID CAP; (2) A GENERALLY FLAT ANNULAR PROJECTION DISPOSED ADJACENT THE PERIPHERY OF THE LOWER SURFACE OF SAID BASE SECTION AND POSITIONED TO CONTACT THE UPPER RIM OF SAID CONTAINER; (3) AN ANNULAR INWARDLY INCLINED LIP DISPOSED ADJACENT AND DEPENDING FROM SAID LOWER SURFACE AND SPACED FROM SAID PROJECTION, AND FURTHER ADAPTED FOR NORMAL CONTACT WITH THE INNER EDGE OF THE UPPER TIM OF SAID CONTAINER; AND (C) AN ANNULAR BEAD ON THE INNER SURFACE OF SAID PERIPHERAL SKIRT DEFINING A SPIRAL OF AT LEAST ONE TURN ADAPTED TO TAKE UP SAID CAP ASSEMBLY, CONTACT SAID ANNULAR PROJECTION OF SAID INSERT ON SAID UPPER RIM, AND PROVIDE A PATH FOR AIR TO ENTER SAID CONTAINER.