Patents by Inventor Ingo Efflander

Ingo Efflander 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 and apparatus for the production of polyester yarn
    Patent number: 6149847
    Abstract: Polyester yarn is made by melt spinning the polyester filaments which are then cooled at least to solidification and heated by counterflow with prestretching to a crystallinity in excess of 24%. The prestretched filaments are gathered and stretched to after-stretching at a temperature of 80.degree. C. to 250.degree. C. to a final titer of 1.0 dtex to 7.5 dtex with a stretching ratio of 1:1.5 to 1:1.15. The yarn is then wound up at a rate of 5000 to 8000 m/min.
    Type: Grant
    Filed: April 2, 1999
    Date of Patent: November 21, 2000
    Assignee: Krupp Uhde GmbH
    Inventors: Rudolf Geier, Ingo Efflander, Jurgen Hartig