Patent ID: 6971558
Filing Date: 2005-12-06
Classification: B65D

Abstract:
1. A closure comprising a self-closing valve, said self-closing valve including a flexible valve wall of a substantially cup-shaped configuration in a first non-dispensing closed at-rest position thereof, said cup-shaped valve wall having a dispensing aperture therein which is closed in said at-rest position, the substantially cup-shaped valve wall being deflected to a second substantially fully inverted upwardly directed dispensing position in response to increased product pressure in a container during which the dispensing aperture is opened, said substantially cup-shaped valve wall being united to an outboard flexible peripheral connecting wall of a predetermined undistorted exterior surface configuration in the first non-dispensing closed at-rest position of said cup-shaped valve wall, an energizing ring having an inboard annular surface in contacting bearing engagement against said connecting wall undistorted exterior surface in said first non-dispensing closed at-rest position of said cup-shaped valve wall, said peripheral connecting wall being axially displaced from said first non-dispensing closed at-rest position to the second aperture open dispensing position at which the connecting wall exterior surface becomes outwardly distorted, and said energizing ring inboard annular surface remains in contacting bearing engagement against said connecting wall exterior surface between said axially displaced at-rest closed position and aperture open dispensing position of said valve wall.