Dispensing container manufacturing apparatus and methods
AssigneeColgate-Palmolive Company
InventorWinston G. Rockefeller
Life of this patent
Estimating the term…
Abstract
Collapsible toothpaste and like dispensing containers having flexible body walls and externally threaded discharge necks are formed by wrapping a sheet of flexible material about a mandrel and fastening overlapping side edges together to provide a tubular body shell having a longitudinal seam, and then inserting and clamping one end of the formed body shell between nested mechanically interengaged inner and outer head structure elements.
Claims15
A method of making a collapsible tube body from a flat flexible sheet of composite metal-synthetic plastics material of predetermined dimensions that bears a finish coating on the side that is to be the outer surface of the tube body, which comprises the steps of positioning said sheet in a predetermined location across the mouth of an upwardly open forming die below a mandrel having a surface contour corresponding to the desired shape of the tube body with the longitudinal edges of the sheet substantially parallel to the mandrel axis, lowering the mandrel for clamping a longitudinally extending intermediate portion of said sheet against the mandrel surface with the side of said sheet that is to be the interior of said tube body contacting the mandrel surface and then displacing said mandrel and sheet downwardly into said forming die and wrapping said sheet substantially entirely around said mandrel with said longitudinal edges in predermined overlap, applying heat and pressure to said overlapped longitudinal edges while said mandrel holds the sheet in said die to form a longitudinally continuous body seam, and then removing the mandrel from said forming die and sliding the body off said mandrel. pg,31
Apparatus for making a collapsible tube body from a flat flexible sheet of composite metal-synthetic plastics material of predetermined dimensions that bears a finish coating on the side that is to be outer surface of the tube body, comprising a movably mounted mandrel having a surface contour corresponding to the desired shape of the tube body, die means having an open mouth adjacent said mandrel, means for locating said sheet in predetermined position across said mouth with the longitudinal edges of the sheet substantially parallel to the mandrel axis, means for clamping a longitudinally extending intermediate portion of said sheet against the mandrel surface with the side of said sheet that is to be the interior of said tube body contacting the mandrel surface, means for moving the mandrel and said clamped sheet into said die means to wrap said sheet substantially entirely around said mandrel with said longitudinal edges in predetermined overlap, and means for applying heat and pressure to said overlapped longitudinal edges while the mandrel holds the sheet in said die means to form a longitudinally continuous body seam.
Dependencies are inferred from the claim text.