Patents by Inventor Albert George Patchell

Albert George Patchell 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).

  • Method of producing banded fibers from a thermoplastic sheet
    Patent number: 3950475
    Abstract: Interconnected fibres banded by cross-sectional orientation and morphology differences, in an array which can be bundled up to separate the fibres at least partially. A thermoplastic sheet emboding areas of different degrees of fibrillation is cold drawn to initiate longitudinally extending cracks in the areas of lower resistance to fibrillation such that the cracks terminate at the areas of higher resistance to fibrillation. The sheet is then further drawn at a higher temperature to open the cracks and to cause the cracks to propagate through the areas of higher resistance to fibrillation. Both drawing steps are performed without lateral extension.
    Type: Grant
    Filed: January 17, 1973
    Date of Patent: April 13, 1976
    Assignee: Smith & Nephew Polyfabrik Limited
    Inventors: James Dow, Ronald Lloyd, Albert George Patchell