초록 ▼

A method is provided of manufacturing an easy-open container. A bodywall layer strip is positioned on a wider liner layer strip to define first and second edge portions on the side of the wider liner layer which extends transversely beyond the bodywall layer side edges. These layers are fed to a man

A method is provided of manufacturing an easy-open container. A bodywall layer strip is positioned on a wider liner layer strip to define first and second edge portions on the side of the wider liner layer which extends transversely beyond the bodywall layer side edges. These layers are fed to a mandrel and the first liner layer edge portion is folded-over onto an outside surface of the bodywall layer and a high strength bond is formed therebetween. The resulting layers are spirally wound on the mandrel to form a continuous tube having a spiral seam with the bodywall layer side edges forming a butt joint and with each of the first and second liner layer edge portions extending through the butt joint and out of the spiral seam. The second liner layer edge portion is positioned on the first folded-over liner layer edge portion and a low strength bond is formed therebetween. A flexible label layer is spirally wound onto the tube on the mandrel with its longitudinal edges in overlapped relationship. The label layer is positioned in superimposed bridging relation to the spiral seam and the liner layer edge portions and in superimposed relation to the remainder of the bodywall layer so that the overlapped label layer edges are adjacent to but not directly superimposed thereon. A low strength bond is formed between the overlapped label layer edges and a high strength bond is formed between the superimposed label layer and the second liner layer edge portion and the superimposed label layer and bodywall layer. The thus wound continuous tube is then cut into individual container lengths.

대표청구항 ▼

[ What is claimed is:] [1.] A method of manufacturing an easy-open container comprising the steps of:providing a flexible barrier liner layer in strip form and a paperboard bodywall layer in strip form and of a width narrower than the liner layer;positioning the bodywall layer in superimposed positi

[ What is claimed is:] [1.] A method of manufacturing an easy-open container comprising the steps of:providing a flexible barrier liner layer in strip form and a paperboard bodywall layer in strip form and of a width narrower than the liner layer;positioning the bodywall layer in superimposed position on the liner layer so as to define longitudinal first and second edge portions on each side of the wider liner layer which extend transversely beyond the bodywall layer side edges;feeding the superimposed liner layer and bodywall layer to a mandrel, while folding-over the first liner layer edge portion onto an outside surface of the bodywall layer in superimposed position thereon and forming a high strength bond therebetween;spirally-winding the resulting liner layer and bodywall layer on the mandrel to form a continuous tube having a spiral seam with the bodywall layer side edges forming a butt joint and with each of the first and second liner layer edge portions extending through the butt joint and out of the spiral seam, while positioning the second liner layer edge portion in superimposed position on the first folded-over liner layer edge portion and forming a low strength bond therebetween;spirally-winding a flexible label layer in strip form onto the spirally-wound continuous tube on the mandrel with its longitudinal edges in overlapped relationship and positioning the label layer in superimposed bridging relation to the spiral seam and the superimposed first and second liner layer edge portions on the outside surface of the bodywall layer and in superimposed relation to the remainder of the bodywall layer so that the overlapped label layer edges are adjacent to but not directly superimposed thereon, while forming a low strength bond between the overlapped label layer edges and a high strength bond between the superimposed label layer and the second liner layer edge portion and the superimposed label layer and bodywall layer; andcutting the thus wound continuous tube with the label layer thereon into individual container lengths.