Patents by Inventor Hideo Izumichi

Hideo Izumichi 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 for producing stabilized yarn for producing carbon fiber
    Patent number: 4814129
    Abstract: A process for producing a stabilized yarn for producing a carbon fiber is disclosed. It includes a step for thermally stabilizing a yarn by travelling a continuous fiber through the heated inside of a thermal stabilization furnace. The yarn stabilizing step is characterized in that a tension applied to the continuous fiber at a final stage of stabilizing process is higher than that applied to the continuous fiber at an initial stage of stabilizing process. An apparatus for carrying out the process is also disclosed. According to the present invention, a thermal stabilization fiber having a higher strength and a finer radius can be produced.
    Type: Grant
    Filed: June 12, 1986
    Date of Patent: March 21, 1989
    Assignee: Nikkiso Co., Ltd.
    Inventors: Koichi Imai, Hideo Izumichi