Patents by Inventor Douwe DROS

Douwe DROS 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 for high speed stranding of aramid yarns
    Patent number: 11204477
    Abstract: A method for stranding aramid yarn around an endless core includes a stranding step that involves a stranding apparatus having at least one yarn bobbin. The bobbin revolves around its own axis and the bobbin revolves around the core, wherein the yarn unwinds from the bobbin and winds around the core. The yarn is a continuous aramid yarn provided with 0.05 to 0.95 wt %, based on the weight of the aramid, of a finish including an organophosphorus compound. The organophosphorus compound is a compound of the formula X1X2X3P?O. X1, X2, and X3 are independently selected from Y1-, Y1-O—, and M-O. Y1 is a branched or straight-chain C1-C20 alkyl, aryl or alkenyl. M is selected from Li, Na, K, or ammonium. At least one of X1, X2, or X3 is selected from Y1- or Y1-O—.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: December 21, 2021
    Assignee: TEIJIN ARAMID B.V.
    Inventors: Huibert Kwint, Douwe Dros, Hendrik Swierenga, Sonja Sas
  • METHOD FOR HIGH SPEED STRANDING OF ARAMID YARNS
    Publication number: 20160025947
    Abstract: A method for stranding aramid yarn around an endless core includes a stranding step that involves a stranding apparatus having at least one yarn bobbin. The bobbin revolves around its own axis and the bobbin revolves around the core, wherein the yarn unwinds from the bobbin and winds around the core. The yarn is a continuous aramid yarn provided with 0.05 to 0.95 wt %, based on the weight of the aramid, of a finish including an organophosphorus compound. The organophosphorus compound is a compound of the formula X1X2X3P?O. X1, X2, and X3 are independently selected from Y1-, Y1-O—, and M-O. Y1 is a branched or straight-chain C1-C20 alkyl, aryl or alkenyl. M is selected from Li, Na, K, or ammonium. At least one of X1, X2, or X3 is selected from Y1- or Y1-O—.
    Type: Application
    Filed: March 13, 2014
    Publication date: January 28, 2016
    Inventors: Huibert KWINT, Douwe DROS, Hendrik SWIERENGA, Sonja SAS