Patents by Inventor Eiji Katou

Eiji Katou 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).

  • Device for cooling molten filaments in spinning apparatus
    Patent number: 5173310
    Abstract: A device for cooling molten filaments in a spinning apparatus is improved by using a heating wire type heater in which a pitch of the heating wires surrounding the cooling apparatus is made closer in the upstream (top) region of the extruded filament than in the downstream (bottom) region. Through use of the device the temperature of the cooling air blown from the cooling apparatus for a plurality of molten filaments extruded from a die is controlled so that the cooling is made progressively stronger from the upstream side (i.e., top side) to the downstream side (i.e., bottom side).
    Type: Grant
    Filed: January 8, 1991
    Date of Patent: December 22, 1992
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Eiji Katou, Akifumi Katou, Yoshihiro Yoshimura