Patents by Inventor Toyoaki Tanaka

Toyoaki Tanaka 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).

  • Patent number: 4902463
    Abstract: Disclosed is an elastic absorbent which comprises a substantially homogeneous mixture of pulverized cellulose pulp and staple fibers of a split yarn obtained by splitting a tape-form oriented laminate comprising at least one layer of a synthetic resin having a high melting point and at least one layer of a synthetic resin having a low melting point, in which the layer of the synthetic resin having a low melting point is at least partially exposed to the surface. Another elastic absorbent comprises an intermediate layer of a powdery polymeric water-absorbing agent, which is interposed between upper and lower layers, each of the upper and lower layers comprising a substantially homogeneous mixture of pulverized cellulose pulp and staple fibers of the same split yarn as mentioned above.
    Type: Grant
    Filed: January 31, 1989
    Date of Patent: February 20, 1990
    Assignee: Showa Denko Kabushiki Kaisha
    Inventors: Toyoaki Tanaka, Katuzi Ohira, Akira Nakamura, Ryosuke Kamei, Akihiro Hashimoto
  • Patent number: 4822668
    Abstract: Disclosed is an elastic absorbent which comprises a substantially homogeneous mixture of pulverized cellulose pulp and staple fibers of a split yarn obtained by splitting a tape-form oriented laminate comprising at least one layer of a synthetic resin having a high melting point and at least one layer of a synthetic resin having a low melting point, in which the layer of the synthetic resin having a low melting point is at least partially exposed to the surface. Another elastic absorbent comprises an intermediate layer of a powdery polymeric water-absorbing agent, which is interposed between upper and lower layers, each of the upper and lower layers comprising a substantially homogeneous mixture of pulverized cellulose pulp and staple fibers of the same split yarn as mentioned above.
    Type: Grant
    Filed: April 30, 1987
    Date of Patent: April 18, 1989
    Assignee: Showa Denko Kabushiki Kaisha
    Inventors: Toyoaki Tanaka, Katuzi Ohira, Akira Nakamura, Ryosuke Kamei, Akihiro Hashimoto
  • Patent number: 4504432
    Abstract: A monofilament of a thermoplastic resin having a high tenacity is produced by a process in which a monofilament is melt spun at a temperature of 220.degree. C. to 310.degree. C. from a thermoplastic resin through a nozzle having a cross-sectional area S (mm.sup.2) satisfying the following equations: ##EQU1## wherein I is a maximum cross-sectional secondary moment max (Ix, Iy) (i.e., the maximum secondary moment in the cross-sectional secondary moments with respect to the main x axis and y axis passing through the center of the gravity of the cross-section); and, then, is subjected to a multi-stage stretching under the conditions satisfying the following equations: ##EQU2## wherein i is a number of stretching stages, e is a base of natural logarithm (i.e., 2.71828), V.sub.1 is the first take-off linear velocity (m/min), V.sub.i+1 is the final take-off linear velocity (m/min) at the i-stretching stage, DR.sub.Ti is the total stretching ratio at the i-stretching stage, DR.sub.Tiw is the DR.sub.
    Type: Grant
    Filed: January 23, 1984
    Date of Patent: March 12, 1985
    Assignee: Showa Denko Kabushiki Kaisha
    Inventors: Ryosuke Kamei, Toyoaki Tanaka, Takeshi Sano, Masataka Kotani