Abstract: A headpiece for a collapsible tube is a unitary member made up of two different plastics, each plastic providing a different property for the headpiece. The headpiece is formed by extruding on top of one another a first torus like annulus of a first plastic and a second torus like annulus of a second plastic. The two plastic annuli are simultaneously molded to form the headpiece. One plastic forms, primarily, the outer portion of the headpiece and the other plastic forms, primarily, the inner portion of the headpiece.The machine for molding the plastic head includes a work table rotatably indexed from station to station at which various operations are performed. The mandrel which holds the cylindrical body, to which the head is molded, is movable from an inboard position to an outboard position so that operations can be performed relative to it. The molding operation is performed at the inboard position. The loading, extruding, capping and ejection operations are performed at the outboard position.

Abstract: One end of a collapsible cylinder having an impermeable side wall is shaped to form an impermeable shoulder and neck liner on which a polyethylene head can be molded. The end of the collapsible cylinder is crimped by a plurality of arms which are swung down simultaneously to form the end of the cylinder into a plurality of pleats, each pleat having a shoulder portion and a neck portion. Each arm carries a prism like member which creases and partially folds over the pleats. This crimped cylinder is then removed to another location where a shoulder forming block descends axially on it to form the shoulder including a re-entrant edge at the outer periphery of the shoulder. A series of truncated, pie-shaped blocks are brought in radially to contact the pleats and complete the folding over of the pleats. The intermediate product thus formed is ready to have the plastic head molded onto it.