METHODS FOR CLOSING CONTAINERS

摘要

A packing container is closed by using a double seam (152) to secure over the container body (70) a cover (74) of smaller diameter than is usual, creating a radial space (104) around the cover chuck wall (122) into which the body sidewall (72) is deformed to form a neck (76). The cover is intially placed on the body to form a sealable interface (142) therebetween, this interface being preserved throughout the seaming process. The body and/or the cover may be of plastics or metal or a laminated material. In an aseptic packaging process, a primary seal is created at the interface (42) under sterile conditions, seaming subsequently being carried out under non-sterile conditions.