Patents by Inventor Kei KOIWAI

Kei KOIWAI 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).

  • Prepreg lamination apparatus, method of laminating prepregs and method of molding composite material
    Patent number: 11679570
    Abstract: According to one implementation, a prepreg lamination apparatus includes first and second rollers, a table, and a feed structure. The first roller sends out a first prepreg tape which is a part of material of an FRP. The second roller sends out a second prepreg tape which is another part of the material of the FRP. The table is for laminating the first and second prepreg tapes directly or indirectly. The feed structure is adapted to feed out the first and second prepreg tapes in a feeding direction by moving the first and second rollers relatively to the table while performing at least one of movement of the first roller relatively to the second roller, and rotation of at least one of the first and second rollers relatively to the table around an axis which is not parallel to each of rotation axes of the first and second rollers.
    Type: Grant
    Filed: July 29, 2021
    Date of Patent: June 20, 2023
    Assignee: SUBARU CORPORATION
    Inventors: Daisuke Hirabayashi, Kazuyuki Aoki, Kei Koiwai, Tomoyoshi Kuniya
  • Fiber width adjustment device, fiber width adjustment method and composite material molding method
    Patent number: 11548241
    Abstract: According to one implementation, a fiber width adjustment device includes: a feeder and an adjuster. The feeder feeds a tape material in a length direction of the tape material. The tape material consists of fibers for a fiber reinforced resin after or before the fibers are impregnated with a resin. The adjuster has a path for the tape material. The path is formed by at least a bottom and a pair of wall surfaces. The interval of the wall surfaces decreased gradually. The width of the tape material which passed the path is changed by adjusting a part of the path. The tape material passes through the part of the path while contacting with the bottom and the wall surfaces.
    Type: Grant
    Filed: October 11, 2019
    Date of Patent: January 10, 2023
    Assignees: SUBARU CORPORATION, FUKUI PREFECTURAL GOVERNMENT
    Inventors: Natsumi Yasukochi, Kei Koiwai, Shigekazu Uchiyama, Kazumasa Kawabe, Keiichi Kondo, Hirofumi Iyo
  • PREPREG LAMINATION APPARATUS, METHOD OF LAMINATING PREPREGS AND METHOD OF MOLDING COMPOSITE MATERIAL
    Publication number: 20220072813
    Abstract: According to one implementation, a prepreg lamination apparatus includes first and second rollers, a table, and a feed structure. The first roller sends out a first prepreg tape which is a part of material of an FRP. The second roller sends out a second prepreg tape which is another part of the material of the FRP. The table is for laminating the first and second prepreg tapes directly or indirectly. The feed structure is adapted to feed out the first and second prepreg tapes in a feeding direction by moving the first and second rollers relatively to the table while performing at least one of movement of the first roller relatively to the second roller, and rotation of at least one of the first and second rollers relatively to the table around an axis which is not parallel to each of rotation axes of the first and second rollers.
    Type: Application
    Filed: July 29, 2021
    Publication date: March 10, 2022
    Applicant: SUBARU CORPORATION
    Inventors: Daisuke HIRABAYASHI, Kazuyuki AOKI, Kei KOIWAI, Tomoyoshi KUNIYA
  • FIBER WIDTH ADJUSTMENT DEVICE, FIBER WIDTH ADJUSTMENT METHOD AND COMPOSITE MATERIAL MOLDING METHOD
    Publication number: 20200190700
    Abstract: According to one implementation, a fiber width adjustment device includes: a feeder and an adjuster. The feeder feeds a tape material in a length direction of the tape material. The tape material consists of fibers for a fiber reinforced resin after or before the fibers are impregnated with a resin. The adjuster has a path for the tape material. The path is formed by at least a bottom and a pair of wall surfaces. The interval of the wall surfaces decreased gradually. The width of the tape material which passed the path is changed by adjusting a part of the path. The tape material passes through the part of the path while contacting with the bottom and the wall surfaces.
    Type: Application
    Filed: October 11, 2019
    Publication date: June 18, 2020
    Inventors: Natsumi YASUKOCHI, Kei KOIWAI, Shigekazu UCHIYAMA, Kazumasa KAWABE, Keiichi KONDO, Hirofumi IYO