Patent ID: 6273305
Filing Date: 2001-08-14
Classification: B65D

Abstract:
A self-closing valve for a packaging container, which comprises (a) a marginal region (20) by which the valve (10) is peripherally secured to a housing (12) so as to close an opening (13) in the same, (b) a valve head (22) having an openable dispensing aperture (70) and movable axially in relation to the marginal region between an advanced, dispensing position in which the aperture is open and product is dispensed under pressure and a retracted, inoperative position in which the aperture is closed and the valve head forms a seal, and (c) a connecting wall (24) which is imperforate and flexible, characterized in that the connecting wall (24) comprises first and second portions (56, 57) serially arranged between the marginal region (20) and the valve head (22) and joined together at a V-form elbow (58), the first portion (56) extending inwardly from the marginal region to the elbow, the second portion (57) extending generally axially from the elbow to peripheral attachment with the valve head, and the connecting wall being of increased wall thickness at the elbow whereby during operation of the valve the elbow may keep its identity and act resiliently as a spring for returning the valve head to its retracted position.