Patents by Inventor Jeffrey M. Seckora

Jeffrey M. Seckora 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).

  • Dual-chamber vacuum box
    Patent number: 5618568
    Abstract: A dual-chamber vacuum box for pinning a thermoplastic web to a cooling roll includes a primary vacuum chamber connected to a first vacuum source. The primary vacuum chamber has a first side located proximate a surface of the web at a line of contact between the web and the cooling roll and a second side opposite the first side. A secondary vacuum is chamber connected to a second vacuum source and is positioned adjacent the second side of the primary vacuum chamber. Apparatus is disposed between the primary and secondary vacuum chambers for creating a pressure variation along the line of contact between the web and the cooling roll.
    Type: Grant
    Filed: February 1, 1995
    Date of Patent: April 8, 1997
    Assignee: Extrusion Dies, Inc.
    Inventors: Vernon J. Krupa, Jeffrey M. Seckora, Brian M. Pitsch