Patents by Inventor Rokuro Sakai

Rokuro Sakai 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).

  • Apparatus for separating the filament bundle of fibrous material
    Patent number: 4380104
    Abstract: A fibrous material composed of multifilaments is forced out of a spinneret with a fluid to collide with an impingement plate thereby separating the filaments, said impingement plate having as its impinging surface a material which creates a negative electrical charge on the surfaces of the filaments of the fibrous material upon impingement. This greatly improves separation of the filaments and permits production of non-woven sheets with high uniformity.
    Type: Grant
    Filed: January 16, 1981
    Date of Patent: April 19, 1983
    Inventors: Seiichi Kamioka, Masahiko Manabe, Rokuro Sakai