Patents by Inventor Mitsumasa Zobuchi

Mitsumasa Zobuchi 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).

  • Optical fiber end processing method and optical fiber end processing apparatus and optical fiber end
    Patent number: 8764317
    Abstract: An optical fiber end processing method includes fixing two portions of an optical fiber, heating and fusing the optical fiber between the two fixed portions, to form a first heat fusion region, heating and fusing the optical fiber fixed between the two fixed portions unit while fixing the two fixed portions, moving a heat fusion unit from a side of the first heat fusion region toward a base end side of the optical fiber, and pushing a heat fusion portion of the optical fiber in a direction of shortening a length of the heat fusion portion, to form a second heat fusion region continuous to the first heat fusion region and in which the air holes of the optical fiber disappear; and removing the first heat fusion region by cutting the optical fiber within the second heat fusion region after the second heat fusion forming.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: July 1, 2014
    Assignee: Hitachi Metals, Ltd.
    Inventors: Masao Tachikura, Noribumi Shiina, Tatsuo Teraoka, Yoshiyuki Hiramoto, Mitsumasa Zobuchi, Fumi Miyata
  • OPTICAL FIBER END PROCESSING METHOD AND OPTICAL FIBER END PROCESSING APPARATUS AND OPTICAL FIBER END
    Publication number: 20120170901
    Abstract: An optical fiber end processing method includes fixing two portions of an optical fiber, heating and fusing the optical fiber between the two fixed portions, to form a first heat fusion region, heating and fusing the optical fiber fixed between the two fixed portions unit while fixing the two fixed portions, moving a heat fusion unit from a side of the first heat fusion region toward a base end side of the optical fiber, and pushing a heat fusion portion of the optical fiber in a direction of shortening a length of the heat fusion portion, to form a second heat fusion region continuous to the first heat fusion region and in which the air holes of the optical fiber disappear; and removing the first heat fusion region by cutting the optical fiber within the second heat fusion region after the second heat fusion forming.
    Type: Application
    Filed: December 14, 2011
    Publication date: July 5, 2012
    Applicant: Hitachi Cable, Ltd.
    Inventors: Masao Tachikura, Noribumi Shiina, Tatsuo Teraoka, Yoshiyuki Hiramoto, Mitsumasa Zobuchi, Fumi Miyata
  • Optical fiber joints and method of joining optical fibers
    Patent number: 4529265
    Abstract: An optical fiber joint and a method of forming such optical fiber joint being reinforced by a reinforcement material, having a prescribed coefficient of thermal expansion, integrally molded thereon by applying heat so as to obtain a predetermined thermal gradient in the reinforcing material, whereby bends in the optical fiber core wire joints are suppressed and the transmission loss of the optical fiber is reduced.
    Type: Grant
    Filed: March 31, 1982
    Date of Patent: July 16, 1985
    Assignee: Hitachi Cable, Ltd.
    Inventors: Shigeo Toya, Koichi Abe, Mitsumasa Zobuchi