Patents by Inventor Fumio AKIYAMA

Fumio AKIYAMA 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).

  • Method for manufacturing oxidized fiber bundle, method for manufacturing carbon fiber bundle, and joining apparatus
    Patent number: 11598029
    Abstract: A manufacturing method and an apparatus enable high productivity. A method for manufacturing an oxidized fiber bundle includes joining an upstream precursor fiber bundle and a downstream precursor fiber bundle together with a joining fiber bundle, and oxidizing the joined precursor fiber bundles by feeding the joined precursor fiber bundles through an oxidization furnace. The joining includes applying an oiling agent to a joint area of a joining target precursor fiber bundle before joining the joining target precursor fiber bundle and the joining fiber bundle together. A quantity of the oiling agent adhering to the joint area is 0.15 to 0.85 wt %.
    Type: Grant
    Filed: February 19, 2020
    Date of Patent: March 7, 2023
    Assignee: TEIJIN LIMITED
    Inventors: Yosuke Nakamura, Fumio Akiyama
  • Method for manufacturing carbon fibers and fiber joining method
    Patent number: 10988862
    Abstract: A carbon fiber manufacturing method includes joining first and second target fiber bundles with a joining fiber bundle, and carbonizing the joined bundles by feeding them through one or more carbonization furnaces. The joining includes forming an overlap between a first end of the joining fiber bundle and a second end of the first target fiber bundle and jetting a fluid to the overlap to form a first entangled portion, and forming an overlap between a second end of the joining fiber bundle and a first end of the second target fiber bundle and jetting a fluid to the overlap to form a second entangled portion.
    Type: Grant
    Filed: January 31, 2017
    Date of Patent: April 27, 2021
    Assignee: TOHO TENAX CO., LTD.
    Inventors: Fumio Akiyama, Tadayuki Aoyama, Ichiro Kitano
  • METHOD FOR MANUFACTURING OXIDIZED FIBER BUNDLE, METHOD FOR MANUFACTURING CARBON FIBER BUNDLE, AND JOINING APPARATUS
    Publication number: 20200263330
    Abstract: A manufacturing method and an apparatus enable high productivity. A method for manufacturing an oxidized fiber bundle includes joining an upstream precursor fiber bundle and a downstream precursor fiber bundle together with a joining fiber bundle, and oxidizing the joined precursor fiber bundles by feeding the joined precursor fiber bundles through an oxidization furnace. The joining includes applying an oiling agent to a joint area of a joining target precursor fiber bundle before joining the joining target precursor fiber bundle and the joining fiber bundle together. A quantity of the oiling agent adhering to the joint area is 0.15 to 0.85 wt %.
    Type: Application
    Filed: February 19, 2020
    Publication date: August 20, 2020
    Applicant: TEIJIN LIMITED
    Inventors: Yosuke NAKAMURA, Fumio AKIYAMA
  • METHOD FOR MANUFACTURING CARBON FIBERS AND FIBER JOINING METHOD
    Publication number: 20190040551
    Abstract: A carbon fiber manufacturing method includes joining first and second target fiber bundles with a joining fiber bundle, and carbonizing the joined bundles by feeding them through one or more carbonization furnaces. The joining includes forming an overlap between a first end of the joining fiber bundle and a second end of the first target fiber bundle and jetting a fluid to the overlap to form a first entangled portion, and forming an overlap between a second end of the joining fiber bundle and a first end of the second target fiber bundle and jetting a fluid to the overlap to form a second entangled portion.
    Type: Application
    Filed: January 31, 2017
    Publication date: February 7, 2019
    Applicant: TOHO TENAX CO., LTD.
    Inventors: Fumio AKIYAMA, Tadayuki AOYAMA, Ichiro KITANO