Patents Assigned to Changing Paradigms, LLC
  • Method and apparatus for stamping a metal sheet with an apertured design having rolled edges
    Patent number: 6233989
    Abstract: A metal container lid having an apertured design with rolled edges is stamped by a method and apparatus incorporating a cushioning pad between a die and the metal sheet, which is then stamped with a perforating punch.
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: May 22, 2001
    Assignee: Changing Paradigms, LLC
    Inventor: Raymond Z. Blinstrubas