Patents by Inventor Tamotsu Nakashima

Tamotsu Nakashima 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).

  • False-twist yarn and process
    Patent number: 4122658
    Abstract: "Islands-in-a-sea" type composite filaments consisting of a relatively low melting point sea component and a plurality of higher melting point island components are false-twisted at a false-twisting temperature Q, wherein:P + 10 .ltoreq. Q < R(wherein P is the melting point of the sea component and R is the melting point of each of the island components) to obtain a false-twist yarn. The cross-sectional configuration of the composite filaments as a whole undergoes deformation, but the cross-sectional configuration of each of the island components in said filaments undergoes substantially no deformation.
    Type: Grant
    Filed: August 29, 1977
    Date of Patent: October 31, 1978
    Assignee: Toray Industries, Inc.
    Inventors: Atsumi Morioka, Tamotsu Nakashima
  • Melt-resistant synthetic fiber and process for preparation thereof
    Patent number: 3950589
    Abstract: A melt-resistant synthetic fiber is produced by adhering to said fiber a mixed aqueous solution of a melamine derivative compound and an acidic catalyst, and thereafter heat-treating in the presence of moisture, whereby the surface of said synthetic fiber is covered with a heat-resistant film.
    Type: Grant
    Filed: February 8, 1973
    Date of Patent: April 13, 1976
    Assignee: Toray Industries, Inc.
    Inventors: Masayuki Togo, Jiyuuro Takahashi, Tamotsu Nakashima, Shizuyoshi Ikenaga