Patents by Inventor Jurgen Foedrowitz

Jurgen Foedrowitz 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).

  • Process and device for the manufacture of non woven webs from filaments
    Patent number: 4163305
    Abstract: Non woven webs are produced from filaments by laying down the said filaments in the form of cone sections on a moving surface with simultaneous spreading out to a filament veil with the use of rotating deflectors coming into contact with the filaments on one side only. The deflecting area of the deflectors has a plane shape. The filaments used are drawn, partially drawn or undrawn. A non woven web with particularly good properties is obtained when the axis of the bundle of filaments and the deflecting surface of the deflector form an angle of from 10.degree. to 80.degree.. To produce the web a simple and reliable device is used.
    Type: Grant
    Filed: December 19, 1975
    Date of Patent: August 7, 1979
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Valentin Semjonow, Jurgen Foedrowitz