초록

Closure membrane for a packaging container which comprises a closure head (5) wherein at least one head plate ring (61) is formed on the closure head, preferably around its border, which extends essentially perpendicular with respect to the plane of the closure head (5).

대표청구항 ▼

1. A closure membrane for a packaging container comprising a closure head including:an internal surface facing towards an interior of the packaging container and an external surface facing outwardly therefrom, at least one slit formed in the closure head and capable of automatically and flexibly ope

1. A closure membrane for a packaging container comprising a closure head including:an internal surface facing towards an interior of the packaging container and an external surface facing outwardly therefrom, at least one slit formed in the closure head and capable of automatically and flexibly opening to dispense product in response to internal pressure in the container and capable of re-closing against escape of product when the internal pressure is later released and, at least one continuously projecting head plate ring integrally formed on the external surface of the closure head around the slit, the head plate ring extending generally perpendicularly to the plane of the closure head, whereby the head plate ring stiffens the closure head to promote termination of product flow when the slit recloses.