Patent ID: 7380678
Filing Date: 2008-06-03
Classification: B65D

Abstract:
1. A lid assembly for closing an opening in a neck of a container, said lid assembly comprising an outer lid member and a planar, multilayered inner lid member, said outer lid member consisting of a top part and a cylindrical collar, said cylindrical collar defining inwardly-extending threads and a single inwardly-extending protrusion which is located below the inner lid member at a level of an upper edge of the neck of the container when the lid assembly is attached to the container, wherein the diameter of the inner lid is larger than an external diameter of the container neck, but simultaneously smaller than an internal diameter of the outer lid, said protrusion of the collar extending radially inwardly to an outer surface of the container neck, and wherein the inner lid has a hole for pressure equalization between the inside of the container and an area between the outer lid and the inner lid, and said planar, multilayered inner lid member consisting of a first layer for sealing against the upper edge of the container and made of a soft thermoplastic elastomer, a second layer having gas barrier properties, and a third layer consisting of thermoplastics which covers the second layer, said third layer making contact with the outer lid, wherein said third layer has a first relatively low friction coefficient with said outer lid and said first layer has a second relatively higher friction coefficient with the upper edge of the neck of the container, wherein during removal of the lid assembly from a container, the outer lid member is rotated relative to the neck of the container and said protrusion will exert an upward pressure against an edge of the inner lid member to cause the inner lid member to be pointwise separated from the upper edge of the neck as the outer lid member is rotated.