Patents by Inventor Daisaku Akase

Daisaku Akase 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).

  • Production device and method for opened fiber bundle and prepreg production method
    Patent number: 6743392
    Abstract: An apparatus and method for producing a spread fiber bundle using a fiber-spreading device composed of a group of rollers and a base body reciprocated to be repetitively brought into contact with and kept away from a running fiber bundle, and a method for producing a prepreg. Fiber bundle can be stably and efficiently spread even in the case where the fiber bundle to be spread are filaments having a high elastic modulus such as carbon filaments or where the carbon fiber bundle conveying speed is higher.
    Type: Grant
    Filed: October 12, 2001
    Date of Patent: June 1, 2004
    Assignee: Toray Industries, Inc.
    Inventors: Kiyotsugu Tanaka, Hiroshi Ohtani, Hidetaka Matsumae, Seiji Tsuji, Daisaku Akase
  • Production device and method for opened fiber bundle and prepreg production method
    Publication number: 20030057585
    Abstract: An apparatus and method for producing a spread fiber bundle using a fiber-spreading device composed of a group of rollers and a base body reciprocated to be repetitively brought into contact with and kept away from a running fiber bundle, and a method for producing a prepreg. Fiber bundle can be stably and efficiently spread even in the case where the fiber bundle to be spread are filaments having a high elastic modulus such as carbon filaments or where the carbon fiber bundle conveying speed is higher.
    Type: Application
    Filed: October 12, 2001
    Publication date: March 27, 2003
    Inventors: Kiyotsugu Tanaka, Hiroshi Ohtani, Hidetaka Matsumae, Seiji Tsuji, Daisaku Akase
  • Method and apparatus for opening reinforcing fiber bundle and method of manufacturing prepreg
    Patent number: 6094791
    Abstract: The present invention provides a method and apparatus, in which a reinforcing fiber bundle consisting of a plurality of paralleled single fibers is or a plurality of mutually paralleled reinforcing fiber bundles respectively consisting of a plurality of paralleled single fibers are driven to run through a plurality of rolls while being bent to open the fiber, and in which the opened reinforcing fiber bundle is impregnated with resin to produce a prepreg, comprising vibrating at least one of the rolls in the axial direction of the roll, to open the reinforcing fiber bundle(s), pressing the reinforcing fiber bundle(s) to the peripheral surface of a roll located immediately downstream of the vibrating roll without vibrating the roll, and bringing the opened reinforcing fiber bundle(s) into contact with the peripheral surface of the non-vibrating roll with a contact length of not less than twice the contact length of the reinforcing fiber bundle(s) on the vibrating roll, for retaining the opened state of the rein
    Type: Grant
    Filed: December 18, 1998
    Date of Patent: August 1, 2000
    Assignee: Toray Industries, Inc.
    Inventors: Daisaku Akase, Hidetaka Matsumae, Tohru Hanano, Toshihide Sekido