Abstract: Metal discs, preferably circular, are cut to a precise diameter and drawn to a preform with a channel and skirt for an aerosol valve mounting cup. The preform then undergoes further forming operations at the stations in a press system. “Bumping” is carried out on the skirt edge at a station, to eliminate non-burr trimming of the cup edge, save material and obtain a carefully controlled skirt height and a substantially even skirt edge with minimized earring. The resultant cup terminating skirt edge is characterized by reformed metal. A further coaxing or pinch-cut operation may be performed on the cup skirt.

Abstract: A method of severing laminates (10) of the type having a metal layer (11) and a synthetic plastics layer (12). The method comprises forming a channel section indentation (13) in the laminate (10) along a line (14) on which the laminate (10) is to be severed, the indentation (13) being of such depth as to extend through the full thickness of the plastics layer (12) and through a part of the thickness of the metal layer (11), such that the plastics material along the line of the indentation (13) is substantially displaced laterally, and severing the laminate (10) along the line (14) of the indentation (13) in the metal layer (11). An apparatus for carrying out the method is disclosed as is the application of the method and apparatus to the production of container tops.