Patents by Inventor Do Jin Chung

Do Jin Chung 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: 6497034
    Abstract: A press machine for attachment of eyelets including a simple die configuration capable of allowing the user to easily carry out an eyelet attachment process on a table. The press machine includes a die that enables the dual operation of punching the sheet or fabric for the eyelet as well as attaching the eyelet.
    Type: Grant
    Filed: June 30, 2001
    Date of Patent: December 24, 2002
    Assignee: Qingdao Gyoha Plastics, Co., Ltd.
    Inventor: Do Jin Chung
  • Publication number: 20020138965
    Abstract: A press machine for attachment of eyelets including a simple die configuration capable of allowing the user to easily carry out an eyelet attachment process on a table. The press machine includes a die that enables the dual operation of punching the sheet or fabric for the eyelet as well as attaching the eyelet.
    Type: Application
    Filed: May 22, 2002
    Publication date: October 3, 2002
    Inventor: Do Jin Chung
  • Publication number: 20020073524
    Abstract: A press machine for attachment of eyelets including a simple die configuration capable of allowing the user to easily carry out an eyelet attachment process on a table. The press machine includes a die that enables the dual operation of punching the sheet or fabric for the eyelet as well as attaching the eyelet.
    Type: Application
    Filed: June 30, 2001
    Publication date: June 20, 2002
    Inventor: Do Jin Chung
  • Patent number: 6253434
    Abstract: A press machine for attachment of eyelets including a simple die configuration capable of allowing the user to easily carry out an eyelet attachment process on a table. The press machine includes a die having a rest room for receiving a washer fed from a washer box, a guide hole vertically formed through the rest room, and guide means for guiding the washer to the rest room, a table received in the rest room in such a fashion that it is vertically slidable, the table serving as a punch die for punching a cloth to be attached with eyelets while serving as a support for supporting the washer received in the rest room during an operation for attaching an eyelet to the cloth, a rack vertically mounted to a lower surface of the table in such a fashion that it is vertically slidable through the guide hole of the die in the rest room, a drive motor adapted to provide a drive force to the rack, the drive motor having a pinion engaged with the rack, and a control unit for controlling the drive motor.
    Type: Grant
    Filed: February 8, 1999
    Date of Patent: July 3, 2001
    Assignee: Qingdao Gyoha Plastics Co., Ltd.
    Inventor: Do Jin Chung
  • Patent number: 6006406
    Abstract: A press machine for attachment of eyelets including a simple die configuration capable of allowing the user to easily carry out an eyelet attachment process on a table. The press machine includes a die having a rest room for receiving a washer fed from a washer box, a guide hole vertically formed through the rest room, and guide means for guiding the washer to the rest room, a table received in the rest room in such a fashion that it is vertically slidable, the table serving as a punch die for punching a cloth to be attached with eyelets while serving as a support for supporting the washer received in the rest room during an operation for attaching an eyelet to the cloth, a rack vertically mounted to a lower surface of the table in such a fashion that it is vertically slidable through the guide hole of the die in the rest room, a drive motor adapted to provide a drive force to the rack, the drive motor having a pinion engaged with the rack, and a control unit for controlling the drive motor.
    Type: Grant
    Filed: February 9, 1999
    Date of Patent: December 28, 1999
    Assignee: Qingdao Gyoha Plastics Co., Ltd.
    Inventor: Do Jin Chung
  • Patent number: D442064
    Type: Grant
    Filed: February 9, 1999
    Date of Patent: May 15, 2001
    Assignee: Qingdao Gyoha Plastics Co., Ltd.
    Inventor: Do Jin Chung