Patents by Inventor Franke Atsma

Franke Atsma 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).

  • Yarn for an artificial turf ground cover, artificial turf ground cover and playing field including such a yarn and method for producing such a yarn
    Patent number: 7611763
    Abstract: A yarn for strands of an artificial turf ground cover, including a tape filament (4) having a core layer (8) and two outer layers (9) of a different material than the core layer (8), each on one of two opposite sides of the core layer. The core layer (8) contains at least polyester or polyolefin material, and the outer layers (9) contain high-density polyethylene. An artificial turf ground cover and a playing field including such a yarn and a method for producing such a yarn are also described. The high-density polyethylene has a relatively small coefficient of friction with the human skin and the yarn has a good shape recovery after deformation in spite of containing HDPE in outer layers.
    Type: Grant
    Filed: May 28, 2003
    Date of Patent: November 3, 2009
    Assignee: Lankhorst Indutech B.V.
    Inventors: Franke Atsma, Durk Wildschut
  • Yarn for an artificial turf ground cover, artificial turf ground cover and playing field including such a yarn and method for producing such a yarn
    Publication number: 20070166507
    Abstract: A yarn for strands of an artificial turf ground cover, including a tape filament (4) having a core layer (8) and two outer layers (9) of a different material than the core layer (8), each on one of two opposite sides of the core layer. The core layer (8) contains at least polyester or polyolefin material, and the outer layers (9) contain high-density polyethylene. An artificial turf ground cover and a playing field including such a yarn and a method for producing such a yarn are also described. The high-density polyethylene has a relatively small coefficient of friction with the human skin and the yarn has a good shape recovery after deformation in spite of containing HDPE in outer layers.
    Type: Application
    Filed: May 28, 2003
    Publication date: July 19, 2007
    Inventors: Franke Atsma, Durk Wildschut