A metallic container end closure is provided which includes a channel or groove in a predetermined location in at least one of an inner panel wall, outer panel wall, or chuckwall, and which is formed by a shaping tool. An apparatus and method for spin-forming the end closure with the improved geometry...http://www.google.es/patents/US7743635?utm_source=gb-gplus-sharePatente US7743635 - Method and apparatus for forming a reinforcing bead in a container end closure
Method and apparatus for forming a reinforcing bead in a container end closure
