Patents by Inventor Mitsuhiro Shiokawa

Mitsuhiro Shiokawa 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 producing multiple layers conjugate fibers
    Patent number: 4019844
    Abstract: An apparatus for producing a multiple layer conjugate fiber having a housing with a rotary cylinder plug and a stationary spinning plate. The housing is provided with at least two polymer feed inlets and the rotary cylinder plug contains at least two grooves along the outer periphery and passageways in communication with the grooves which open out at the lower surface of the rotary plug. The spinning plate contains a plurality of spinning orifices that are positioned and lined up with the passageways of the rotary cylinder plug. Means are provided for forming a limited space or multiple laminar chamber.
    Type: Grant
    Filed: July 2, 1975
    Date of Patent: April 26, 1977
    Assignee: Toray Industries, Inc.
    Inventors: Masafumi Ogasawara, Masanori Akita, Kazuhiko Saito, Yoshikazu Kikuchi, Mitsuhiro Shiokawa