Patents by Inventor Yoshio Aratani

Yoshio Aratani 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).

  • Potentially bulky yarn
    Patent number: 4382992
    Abstract: A potentially bulky, processed yarn which is a substantially non-interlaced multifilament yarn of a thermoplastic synthetic fiber satisfying the characteristic values of R.sub.max /R.ltoreq.2.5, .DELTA.S.sub.5 .gtoreq.1.5, .DELTA.S.sub.50 .ltoreq.3.0, Y.gtoreq.1.3 and X.sub.T --X.ltoreq.1.0, where R.sub.max is maximum tension fluctuation width, R is average tension fluctuation width of a normal portion, .DELTA.S.sub.5 is difference in maximum shrinkage among each filament of a sample having a length of 5 cm, .DELTA.S.sub.50 is difference in maximum shrinkage among each filament of a sample having a length of 50 cm, X.sub.T is maximum tension, X is average tension and Y is degree of bulkiness/dry heat shrinkage.
    Type: Grant
    Filed: July 21, 1980
    Date of Patent: May 10, 1983
    Assignee: Toray Industries, Inc.
    Inventors: Yukio Otaki, Masatoshi Mineo, Kiyoshi Nakagawa, Shiro Nishiumi, Yoshio Aratani
  • Process for producing a potentially bulky yarn
    Patent number: 4263368
    Abstract: A process for producing a potentially bulky yarn which is a substantially non-interlaced multifilament yarn of a thermoplastic synthetic fiber satisfying the characteristic values of R.sub.max /R.ltoreq.2.5, .DELTA.S.sub.5 .gtoreq.1.5, .DELTA.S.sub.50 .ltoreq.3.0, Y.gtoreq.1.3 and X.sub.T -X.ltoreq.1.0, where R.sub.max is maximum tension fluctuation width, R is average tension fluctuation width of a normal portion, .DELTA.S.sub.5 is difference in maximum shrinkage among each filament of a sample having a length of 5 cm, .DELTA.S.sub.50 is difference in maximum shrinkage among each filament of a sample having a length of 50 cm, X.sub.T is maximum tension, X is average tension and Y is degree of bulkiness/dry heat shrinkage.
    Type: Grant
    Filed: January 5, 1979
    Date of Patent: April 21, 1981
    Assignee: Toray Industries, Inc.
    Inventors: Yukio Otaki, Masatoshi Mineo, Kiyoshi Nakagawa, Shiro Nishiumi, Yoshio Aratani
  • Textured polyester yarns and process for the production thereof
    Patent number: 4084622
    Abstract: A textured polyester yarn having improved variation in dyeability along its length is composed of a plurality of individual filaments each having thick and thin sections randomly distributed along the filament axis, said yarn having an Uster evenness value of 1.0 to 10.0%, a T index of 3 to 30 and a variation in reflected light intensity in a continuous dyeing test of .+-.0.15 to .+-.0.80 and said yarn preferably having not-untwisted portions containing genuine twists of a fixed direction intermittently retained at random along its length. The yarn is produced by false twisting a polyester yarn composed of a plurality of individual filaments each having variation in cross-sectional area along its length, in which the thick sections have a birefringence of 15 to 80.times.10.sup.-3 and the thin sections have a birefringence of 90 to 200+10.sup.-3, at a temperature of not lower than 180.degree. C and under a twisting tension of 0.05 to 0.8 g/d with a variation with respect to the average twisting tension of .+-.
    Type: Grant
    Filed: March 28, 1977
    Date of Patent: April 18, 1978
    Assignee: Toray Industries Inc.
    Inventors: Kiyoshi Nakagawa, Yukio Otaki, Masatoshi Mineo, Yoshio Aratani, Yoshio Tatsuoka, Haruhiko Kusakabe