초록 ▼

An easy-open composite container has a membrane-type closure and includes a laminated tubular body member of composite materials having a predetermined laminated strength. The body member includes a bodywall portion and a liner portion positioned inside the bodywall portion and forming an inside sur

An easy-open composite container has a membrane-type closure and includes a laminated tubular body member of composite materials having a predetermined laminated strength. The body member includes a bodywall portion and a liner portion positioned inside the bodywall portion and forming an inside surface of the body member. An outwardly-rolled rim portion is formed at the upper area of an open upper end of the tubular body member and the liner portion forms a top surface of the body member open upper end and an outside surface of the outwardly rolled rim portion. A cut extends circumferentially around a segment of the outside surface of the rim portion and extends radially-inwardly through at least a part of the liner portion. A membrane closure covers the open upper end of the body member and has an outwardly extending tab portion positioned over the cut in the rim portion of the body member. A bond is formed between the top surface of the body member open upper end and the membrane member for hermetically closing such open upper end. This bond has a predetermined strength greater than the laminated strength of the tubular body member and sufficient to prevent leakage caused by internal pressure within the container. With the above construction, the composite container can be easily opened by pulling the pull tab portion of the membrane closure member which causes radial delamination of a segment of the body member rim portion at the cut in the rim portion to provide an easy start for removing the membrane member with the delaminated rim portion segment from the remainder of the body member rim portion of the container.

대표청구항 ▼

[What is claimed is:] [1.]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 f

[What is claimed is:] [1.]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.