Patents by Inventor William Donald Robinson

William Donald Robinson 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).

  • Inline solid state polymerization of PET flakes for manufacturing plastic strap by removing non-crystalline materials from recycled PET
    Patent number: 6376563
    Abstract: A process for preparing a PET flake mixture for use in connection with the fabrication of high-performance plastic strapping comprises the steps of initially collecting post-consumer and non-post-consumer PET materials having an initially wide range of relatively low intrinsic viscosity (IV) values with a relatively low average intrinsic viscosity (IV) value, and processing the same through solid state polymerization (SSP) so as to obtain a wide range of relatively high intrinsic viscosity (IV) values with a relatively high average intrinsic viscosity (IV) value. The initially collected materials are chopped into flakes and chunks, and the chunks are removed by a suitable destoner so as to render the remaining mixture comprised substantially entirely of flake materials or segments.
    Type: Grant
    Filed: December 26, 2000
    Date of Patent: April 23, 2002
    Assignee: Illinois Tool Works Inc.
    Inventors: William Donald Robinson, Gary L. Vadnais
  • Inline solid state polymerization of PET flakes for manufacturing plastic strap by removing non-crystalline materials from recycled PET
    Patent number: 6284808
    Abstract: A process for preparing a PET flake mixture for use in connection with the fabrication of high-performance plastic strapping comprises the steps of initially collecting post-consumer and non-post-consumer PET materials having an initially wide range of relatively low intrinsic viscosity (IV) values with a relatively low average intrinsic viscosity (IV) value, and processing the same through solid state polymerization (SSP) so as to obtain a wide range of relatively high intrinsic viscosity (IV) values with a relatively high average intrinsic viscosity (IV) value. The initially collected materials are chopped into flakes and chunks, and the chunks are removed by a suitable destoner so as to render the remaining mixture comprised substantially entirely of flake materials or segments.
    Type: Grant
    Filed: October 13, 1998
    Date of Patent: September 4, 2001
    Assignee: Illinois Tool Works Inc.
    Inventors: William Donald Robinson, Gary L. Vadnais
  • Inline solid state polymerization of PET flakes for manufacturing plastic strap by removing non-crystalline materials from recycled PET
    Publication number: 20010004645
    Abstract: A process for preparing a PET flake mixture for use in connection with the fabrication of high-performance plastic strapping comprises the steps of initially collecting post-consumer and non-post-consumer PET materials having an initially wide range of relatively low intrinsic viscosity (IV) values with a relatively low average intrinsic viscosity (IV) value, and processing the same through solid state polymerization (SSP) so as to obtain a wide range of relatively high intrinsic viscosity (IV) values with a relatively high average intrinsic viscosity (IV) value. The initially collected materials are chopped into flakes and chunks, and the chunks are removed by a suitable destoner so as to render the remaining mixture comprised substantially entirely of flake materials or segments.
    Type: Application
    Filed: December 26, 2000
    Publication date: June 21, 2001
    Applicant: ILLINOIS TOOL WORKS INC.
    Inventors: William Donald Robinson, Gary L. Vadnais