Patents by Inventor Sadayuki Ito

Sadayuki Ito 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).

  • Resin-sealing apparatus
    Patent number: 6457963
    Abstract: The invention provides a resin-sealing apparatus that is operated with a low pressure and with a low clamping force without void generation and that is favorable for shortening the molding time and reduction of sealing resin consumption. In the resin-sealing apparatus of the present invention, a resin injection inlet of a pot has an opening at the center of the cavity surface of a cavity of a bottom mold that is a component of a mold unit, and a plunger for injecting molten resin in the pot from the opposite side to the resin injection inlet side is provided slidably and airtightly with the inside wall of the pot.
    Type: Grant
    Filed: August 8, 2000
    Date of Patent: October 1, 2002
    Assignee: Sony Corporation
    Inventors: Masato Tawara, Toshiyuki Ebara, Kazuhiko Hatakawa, Sadayuki Ito
  • Flexible magnetic disk cassette and a recording and/or reproducing apparatus for the same
    Patent number: 4581669
    Abstract: A recording and/or reproducing apparatus and a magnetic disk cassette having a flexible magnetic disk and a cover for containing the magnetic disk. The cover has a driving hole for driving the flexible magnetic disk from outside of the cover, a recording opening for exposing a recording surface of the flexible magnetic disk, and a cut-out portion provided on one side of the cover for detecting correct installation of the flexible magnetic disk cassette into a recording and/or reproducing apparatus. A shutter is slidably provided on the cover for selectively exposing the recording surface through the recording opening and the cut-out portion when the flexible magnetic disk is ready for use. The recording and/or reproducing apparatus for the flexible magnetic disk cassette includes a driving member engaged with the flexible magnetic disk through the driving hole of the cover for rotating the flexible magnetic disk.
    Type: Grant
    Filed: August 25, 1983
    Date of Patent: April 8, 1986
    Assignee: Sony Corporation
    Inventors: Akira Tsuji, Sadayuki Ito, Kazumi Fujimoto
  • Flexible magnetic disk cassette and a recording and/or reproducing apparatus for the same
    Patent number: 4517617
    Abstract: A recording and/or reproducing apparatus and a magnetic disk cassette having a flexible magnetic disk and a cover for containing the magnetic disk. The cover has a driving hole for driving the flexible magnetic disk from outside of the cover, a recording opening for exposing a recording surface of the flexible magnetic disk, and a cut-out portion provided on one side of the cover for detecting correct installation of the flexible magnetic disk cassette into a recording and/or reproducing apparatus. A shutter is slidably provided on the cover for selectively exposing the recording surface through the recording opening and the cut-out portion when the flexible magnetic disk is ready for use. The recording and/or reproducing apparatus for the flexible magnetic disk cassette includes a driving member engaged with the flexible magnetic disk through the driving hole of the cover for rotating the flexible magnetic disk.
    Type: Grant
    Filed: August 13, 1981
    Date of Patent: May 14, 1985
    Assignee: Sony Coporation
    Inventors: Akira Tsuji, Sadayuki Ito, Kazumi Fujimoto