Patents by Inventor Charles Princell

Charles Princell 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).

  • Polymeric foam tube insulations and method for continuously producing such a tube
    Patent number: 7854240
    Abstract: The foam tube for pipe insulations has an external surface and an internal surface. The internal surface is provided with an adhesively bonded layer of fibers. The fibers are a material having a melt temperature that is higher than that of the polymeric foam. The fibers are adhesively bonded to the internal surface such as to stand up from the internal surface. The fibers are substantially uniformly distributed over the internal surface providing a surface coverage of 2 to 20 percent. Further, the fibers have a linear density of 0.5 to 25 dtex and a length of 0.2 to 5 mm. With this fiber layer the polymeric foam tube has an improved thermal resistance and thermal conductivity.
    Type: Grant
    Filed: July 18, 2003
    Date of Patent: December 21, 2010
    Assignee: Armacell Enterprise GmbH
    Inventors: Mika Meller, Juerg Weibel, Stephen C. Davis, Scott A. White, Charles Princell
  • Polymeric foam tube insulations and method for continuously producing such a tube
    Publication number: 20070107795
    Abstract: The foam tube for pipe insulations has an external surface and an internal surface. The internal surface is provided with an adhesively bonded layer of fibers. The fibers are a material having a melt temperature that is higher than that of the polymeric foam. The fibers are adhesively bonded to the internal surface such as to stand up from the internal surface. The fibers are substantially uniformly distributed over the internal surface providing a surface coverage of 2 to 20 percent. Further, the fibers have a linear density of 0.5 to 25 dtex and a length of 0.2 to 5 mm. With this fiber layer the polymeric foam tube has an improved thermal resistance and thermal conductivity.
    Type: Application
    Filed: July 18, 2003
    Publication date: May 17, 2007
    Applicant: Armacell Enterprise GmbH
    Inventors: Mika Meller, Juerg Weibel, Stephen Davis, Scott White, Charles Princell