Patents by Inventor David P. Zettel

David P. Zettel has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Polymer foam plank with densified skin, method and apparatus for producing a densified skin on a foam plank
    Patent number: 7201958
    Abstract: A method and apparatus for making a densified skin polymer foam plank comprising providing a polymer foam having a plurality of cells and heating an outer surface of the foam at a heating station. The heating step collapses and melts the cells adjacent the outer surface to form the densified skin having a density greater than a density of the foam before the heating step. Additionally, the method and apparatus may further include extruding the polymer foam from an extruder.
    Type: Grant
    Filed: February 2, 2004
    Date of Patent: April 10, 2007
    Assignee: Pregis Innovative Packaging Inc.
    Inventors: Jeffrey J. Stimler, David P. Zettel, Said K. Farha
  • Polymer foam plank with densified skin, method and apparatus for producing a densified skin on a foam plank
    Publication number: 20040157050
    Abstract: A method and apparatus for making a densified skin polymer foam plank comprising providing a polymer foam having a plurality of cells and heating an outer surface of the foam at a heating station. The heating step collapses and melts the cells adjacent the outer surface to form the densified skin having a density greater than a density of the foam before the heating step. Additionally, the method and apparatus may further include extruding the polymer foam from an extruder.
    Type: Application
    Filed: February 2, 2004
    Publication date: August 12, 2004
    Inventors: Jeffrey J. Stimler, David P. Zettel, Said K. Farha
  • Polymer foam plank with densified skin, method and apparatus for producing a densified skin on a foam plank
    Patent number: 6716379
    Abstract: A method and apparatus for making a densified skin polymer foam plank comprising providing a polymer foam having a plurality of cells and heating an outer surface of the foam at a heating station. The heating step collapses and melts the cells adjacent the outer surface to form the densified skin having a density greater than a density of the foam before the heating step. Additionally, the method and apparatus may further include extruding the polymer foam from an extruder.
    Type: Grant
    Filed: February 3, 2000
    Date of Patent: April 6, 2004
    Assignee: Pactiv Corporation
    Inventors: Jeffrey J. Stimler, David P. Zettel, Said K. Farha
  • Polymer foam plank with densified skin, method and apparatus for producing a densified skin on a foam plank
    Publication number: 20030008127
    Abstract: A method and apparatus for making a densified skin polymer foam plank comprising providing a polymer foam having a plurality of cells and heating an outer surface of the foam at a heating station. The heating step collapses and melts the cells adjacent the outer surface to form the densified skin having a density greater than a density of the foam before the heating step. Additionally, the method and apparatus may further include extruding the polymer foam from an extruder.
    Type: Application
    Filed: February 3, 2000
    Publication date: January 9, 2003
    Inventors: Jeffrey J Stimler, David P Zettel, Said K Farha