Patents by Inventor Ikushi Nakashima

Ikushi 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).

  • Patent number: 5982592
    Abstract: A recording and playback device utilizing magnetic tape, such as a tape cassette, as a recording medium includes a magnetic head arranged to contact one side of the magnetic tape and a stabilizer arranged positioned directly opposed the magnetic head corresponding to the opposite side of the magnetic tape such that the magnetic tape move along a path interposed between the stabilizer and the magnetic head. The stabilizer includes a tape slider surface in contact with the side of the tape opposite the magnetic head contacting side. Further, the tape slider surface of the stabilizer may be formed with a recessed portion and tape surface scraper portions. According to this structure vibration of the magnetic tape in the vicinity of the magnetic head is greatly reduced such that a head servo for control of the magnetic head may accurately position the magnetic head even in devices utilizing a very small track pitch.
    Type: Grant
    Filed: November 14, 1996
    Date of Patent: November 9, 1999
    Assignee: Sony Corporation
    Inventors: Kengo Saito, Ikushi Nakashima, Toshio Kano, Takashi Sato, Shinji Masugi
  • Patent number: 5872692
    Abstract: A recording/reproducing apparatus in which recording/reproducing characteristics for the magnetic tape may be stabilized and data errors may be reliably prevented form occurrence. The recording/reproducing apparatus has a magnetic head 81 in which a pair of magnetic core halves 83A, 83B of a magnetic material are abutted to each other via a gap material g to form a magnetic core. Magnetic tape guide units 82A, 82B are provided in the vicinity of the magnetic head 81. The magnetic tape guide units 82A, 82B are formed with magnetic tape suction openings 82b, 82b closed by a magnetic tape 88 adapted for having a sliding contact with the tape slide surface 82a. The magnetic tape suction openings 82b, 82b suck the magnetic tape 88 running on the tape slide surfaces 82a, 82a of the magnetic tape guide units 82A, 82B.
    Type: Grant
    Filed: May 16, 1997
    Date of Patent: February 16, 1999
    Assignee: Sony Corporation
    Inventors: Kengo Saito, Ikushi Nakashima, Osamu Koizumi, Masanori Sato, Shinji Masugi, Noriko Nakazawa
  • Patent number: 5847906
    Abstract: A recording/reproducing apparatus in which recording/reproducing characteristics for the magnetic tape may be stabilized and data errors may be reliably prevented form occurrence. The recording/reproducing apparatus has a magnetic head 81 in which a pair of magnetic core halves 83A, 83B of a magnetic material are abutted to each other via a gap material g to form a magnetic core. Magnetic tape guide units 82A, 82B are provided in the vicinity of the magnetic head 81. The magnetic tape guide units 82A, 82B are formed with magnetic tape suction openings 82b, 82b closed by a magnetic tape 88 adapted for having a sliding contact with the tape slide surface 82a. The magnetic tape suction openings 82b, 82b suck the magnetic tape 88 running on the tape slide surfaces 82a, 82a of the magnetic tape guide units 82A, 82B.
    Type: Grant
    Filed: May 16, 1997
    Date of Patent: December 8, 1998
    Assignee: Sony Corporation
    Inventors: Kengo Saito, Ikushi Nakashima, Osamu Koizumi, Masanori Sato, Shinji Masugi, Noriko Nakazawa