Patents by Inventor Akihiro Maekawa

Akihiro Maekawa 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: 7678450
    Abstract: To provide a sewing thread that is excellent in high-speed sewability and automatic sewing characteristics. A sewing thread includes a plurality of under-twisted yarns provided with upper-twist, the yarns each being composed of a sheath-core structure yarn composed of two or more multifilament yarns, wherein part of the sheath-core structure yarn protrudes as loops on a yarn surface, the loops being composed of 50 to 300 loops/m with 0.7 to less than 1.2 mm length and 10 or less loops/m with 1.2 mm or more length, and wherein the yarns have a strength of 4 to 6 CN/dtex.
    Type: Grant
    Filed: April 3, 2003
    Date of Patent: March 16, 2010
    Assignee: Toray Industries, Inc.
    Inventors: Haruki Kitamura, Toshihiko Kimura, Kazuo Umeda, Yoshikazu Tsuji, Naoki Yamaga, Akihiro Maekawa
  • Publication number: 20050202240
    Abstract: To provide a sewing thread that is excellent in high-speed sewability and automatic sewing characteristics. A sewing thread includes a plurality of under-twisted yarns provided with upper-twist, the yarns each being composed of a sheath-core structure yarn composed of two or more multifilament yarns, wherein part of the sheath-core structure yarn protrudes as loops on a yarn surface, the loops being composed of 50 to 300 loops/m with 0.7 to less than 1.2 mm length and 10 or less loops/m with 1.2 mm or more length, and wherein the yarns have a strength of 4 to 6 CN/dtex.
    Type: Application
    Filed: April 3, 2003
    Publication date: September 15, 2005
    Applicant: TORAY Industries, Inc.
    Inventors: Haruki Kitamura, Toshihiko Kimura, Kazuo Umeda, Yoshikazu Tsuji, Naoki Yamaga, Akihiro Maekawa
  • Patent number: 6854967
    Abstract: The invention relates to an electric injecting molder and an injection velocity and injection pressure controlling method for an electric injecting molder, and it is an object of the present invention to make it possible, in injection molding by an electric injection molder, to mold stable resin products having a minimized dispersion in the quality even if the operation environment varies. When an injection screw (23) disposed in an injection cylinder (22) is driven to move in forward and backward directions by an electric motor (29A) to inject resin material (3) in the injection cylinder (22) into a metal mold (1, 2) to fill the metal mold (1, 2), the electric motor (29A) is first velocity-controlled to fill the resin material (3) into the metal mold (1, 2), and, after the filling, the electric motor (29A) is pressure-controlled to replenish the resin material for shrinkage of the resin.
    Type: Grant
    Filed: October 30, 2001
    Date of Patent: February 15, 2005
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Kenji Tsutsui, Akihiro Maekawa, Tadashi Murata, Junji Murase
  • Publication number: 20020192322
    Abstract: The invention relates to an electric injecting molder and an injection velocity and injection pressure controlling method for an electric injecting molder, and it is an object of the present invention to make it possible, in injection molding by an electric injection molder, to mold stable resin products having a minimized dispersion in the quality even if the operation environment varies. When an injection screw (23) disposed in an injection cylinder (22) is driven to move in forward and backward directions by an electric motor (29A) to inject resin material (3) in the injection cylinder (22) into a metal mold (1, 2) to fill the metal mold (1, 2), the electric motor (29A) is first velocity-controlled to fill the resin material (3) into the metal mold (1, 2), and, after the filling, the electric motor (29A) is pressure-controlled to replenish the resin material for shrinkage of the resin.
    Type: Application
    Filed: June 26, 2002
    Publication date: December 19, 2002
    Inventors: Kenji Tsutsui, Akihiro Maekawa, Tadashi Murata, Junji Murase
  • Patent number: 6414452
    Abstract: A waveform control unit of a vibrating table comprises: an off-line compensation wave generator which generates an off-line compensation wave on the basis of the inverse characteristic of the vibrating table determined before performing an excitation and a target wave; and an on-line compensation wave generator which generates an on-line compensation wave on the basis of the inverse characteristic of the vibrating table during the excitation determined on the basis of the data of an excitation wave and a reproduced wave during the excitation and the target wave, and it switches the excitation wave to a mixed compensation wave based on the on-line compensation wave from the off-line compensation wave, during the excitation.
    Type: Grant
    Filed: October 4, 2000
    Date of Patent: July 2, 2002
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Yukihito Okuda, Akihiro Maekawa, Takaharu Hiroe, Makoto Sakuno