Patents by Inventor Youichi Sakai

Youichi Sakai 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).

  • Liner for floppy disk jacket
    Patent number: 5122919
    Abstract: A liner for a floppy disk comprising a partially thermocompression-bonded nonwoven fabric composed of a cellulosic fiber and a polyester, core-sheath type conjugated fiber wherein the melting point of the sheath component is lower than that of the core component, in which the mixture ratio of the conjugated fiber decreases gradually from the inner part toward the outer part of the liner, and parts heat-bonded in a dot or in a line through the conjugated fiber are present in a large number in the non thermocompression-bonded parts.
    Type: Grant
    Filed: November 30, 1989
    Date of Patent: June 16, 1992
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Sigeru Takemae, Akira Aoki, Youichi Sakai