Patents by Inventor Jun WAKATABE

Jun WAKATABE 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).

  • Lower thread supply device of sewing machine
    Patent number: 11286598
    Abstract: A lower thread supply device of a sewing machine includes a bobbin, a bobbin case, a magnetic force member, and a magnetic force change portion. The bobbin has a cylindrical portion for inserting into a spindle of a shuttle, a shuttle side flange portion, and a front surface side flange portion which is magnetic, and a lower thread is wound around an outer circumference of the cylindrical portion between the shuttle side flange portion and the front surface side flange portion. The bobbin case has a non-magnetic cover portion having a front surface side part and a side wall part, housing the bobbin and transmitting a magnetic force. The magnetic force member is arranged at the front surface side of the bobbin case and attracts the front surface side flange portion of the bobbin by a magnetic force via the bobbin case.
    Type: Grant
    Filed: March 15, 2020
    Date of Patent: March 29, 2022
    Assignees: JUKI CORPORATION, TOWA JAPAN Corporation
    Inventors: Takeshi Asami, Jun Wakatabe, Kazuyuki Yada
  • LOWER THREAD SUPPLY DEVICE OF SEWING MACHINE
    Publication number: 20200291562
    Abstract: A lower thread supply device of a sewing machine includes a bobbin, a bobbin case, a magnetic force member, and a magnetic force change portion. The bobbin has a cylindrical portion for inserting into a spindle of a shuttle, a shuttle side flange portion, and a front surface side flange portion which is magnetic, and a lower thread is wound around an outer circumference of the cylindrical portion between the shuttle side flange portion and the front surface side flange portion. The bobbin case has a non-magnetic cover portion having a front surface side part and a side wall part, housing the bobbin and transmitting a magnetic force. The magnetic force member is arranged at the front surface side of the bobbin case and attracts the front surface side flange portion of the bobbin by a magnetic force via the bobbin case.
    Type: Application
    Filed: March 15, 2020
    Publication date: September 17, 2020
    Applicants: JUKI CORPORATION, TOWA JAPAN Corporation
    Inventors: Takeshi ASAMI, Jun WAKATABE, Kazuyuki YADA