Patent ID: 6776301
Filing Date: 2004-08-17
Classification: B65D

Abstract:
A cap for mating with a pour spout on a flexible package in order to close the package, the cap comprising:a top wall; an outer wall extending downwardly from the top wall and having a connection adapted to recloseably mate with the pour spout; an inner wall extending downwardly from an inner portion of the top wall substantially concentrically with the outer wall; the inner wall and the inner portion of the top wall defining a cavity with an open bottom and a gas escape path; an insert valve mounted within a bottom of the cavity forming a seal with the inner wall, the insert valve having one or more apertures extending therethrough, a top surface of the insert valve, the inner wall, and the inner portion of the top wall defining a chamber within the cavity, the chamber being in fluid communication with the gas escape path; a septum seated flush on the top surface of the insert valve within the chamber and flush with and sealing the apertures, the septum adapted to at least partially unseat from the insert valve in response to an increase in gas pressure within the package and reseat on the insert valve when pressure on both sides of the insert valve equalizes.