Patent ID: 6196450
Filing Date: 2001-03-06
Classification: B65D

Abstract:
An easy-open composite container having a membrane-type closure and comprising:a laminated tubular body member of composite materials having a predetermined laminated strength and defining inside and outside surfaces and an open upper end, said body member including a body wall portion and a liner portion positioned inside said body wall portion and forming said body member inside surface;an outwardly-rolled rim portion formed at an upper area of said open upper end of said tubular body member and wherein said liner portion forms a top surface of said body member open upper end and an outside surface of said outwardly-rolled rim portion;a cut extending circumferentially around a segment of said outside surface of said rim portion and extending radially-inwardly through at least a part of said liner portion;a membrane closure member of substantially a shape corresponding to said body member open upper end and having a pull tab portion extending-outwardly from an outer circumferential area thereof, said membrane closure member being positioned on said top surface of said body member open upper end with said pull tab portion over said cut in said rim portion; anda bond between said top surface of said body member open upper end and said membrane member for hermetically closing said open upper end, said bond having a predetermined strength greater than laminated strength of said tubular body member and sufficient to prevent leakage caused by internal pressure within said container;whereby, said composite container can be easily opened by pulling said pull tab portion of said membrane closure member which causes radial delamination a segment of said rim portion of said body member at said cut segment to provide an easy start for removing said membrane member with the delaminated rim portion segment from the remainder of said body member rim portion.