Method for forming a composite container including a reversely curled body member

Abstract

An improved composite container is disclosed including a tubular fibrous body wall having at its upper end a reversely curled portion the upper extremity of which is radially inwardly compressed in such a manner as to form an annular external locking projection by means of which a synthetic plastic closure cap may be fastened to close the container. Preferably the closure member is connected with the container by a tearable tamperproof connection including a radially inwardly directed annular rib that is locked beneath the annular body projection to maintain the closure cap on the container. A method is also disclosed for forming the container body, including the steps of radially outwardly curling the upper end of the body member, radially inwardly compressing the upper extremity of the reversely curled portion, and mounting a synthetic plastic snap-type closure member on the compressed curled end. In one embodiment, a circumferential recess is formed (for example, by skiving) in the outer surface of the tubular fibrous body wall prior to the reverse curling step, whereby the upper extremity of the reversely curled portion is radially inwardly compressed into the recess.

Dependencies are inferred from the claim text.