Method for producing a screw metal closure with separate disc and ring from a single closure blank

摘要

A method of production for a 2-piece "combo" style closure (1') having a disk (10') constrained within a peripheral ring (20'). The "combo" style closure (1') is produced from a conventional one-piece closure shell (1) by severing the sidewall (20) adjacent to the top plate (10) by a punch to produce the ring (20') and disc (10') respectively, both having a cut edge.