Patents Assigned to Global Control Corporation
  • Process for the manufacture of rods of thermoplastic material, having internal capillary ducts, for the preparation of pen nibs incorporating capillary ink ducts
    Patent number: 3933965
    Abstract: Pen nibs are made by extruding rods from fused thermoplastic material, with a cavity in the rod of star-shaped cross-sectional configuration. The extruded rod is then cooled and mechanically drawn to reduce its diameter about 50%, which closes the inner ends of the arms of the star and brings them together at the center of the rod, while leaving the outer ends of the arms relatively large. The resulting product is then sharpened at both ends for use as a pen nib.
    Type: Grant
    Filed: May 13, 1974
    Date of Patent: January 20, 1976
    Assignee: Global Control Corporation
    Inventors: Ermenegildo Gallone, Francesco Mazzier