Patents by Inventor Shigeo SUMIYAMA

Shigeo SUMIYAMA 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).

  • Publication number: 20200290106
    Abstract: A stamping method includes: punching out a product from a workpiece by using a die on which the conveyed workpiece is placed, a punch, and a back pressure portion; displacing the workpiece upward with respect to the die when the punch moves away from the die; before the product is punched out, providing a protrusion that protrudes downward and is located at a part of the workpiece, the part being on the upstream side in a workpiece conveying direction of a punch-out portion and aligned with the punch-out portion; and using the protrusion, which is displaced downstream in the conveying direction together with the workpiece, to push the product downstream in the conveying direction, so that the product is ejected to the outside.
    Type: Application
    Filed: March 5, 2020
    Publication date: September 17, 2020
    Applicant: TOYOTA BOSHOKU KABUSHIKI KAISHA
    Inventors: Shigeo SUMIYAMA, Yuta YAMAKITA, Taira ITO
  • Publication number: 20200290107
    Abstract: A stamping apparatus includes a die, a punch, a back-pressure device, a lift-up mechanism, and a delay device. A workpiece is mounted on the die. The punch is arranged to approach and recede from the die and configured to punch out a product from the workpiece. The back-pressure device includes a pushing member disposed in the die and urges the pushing member toward the punch to apply back pressure to the workpiece. The lift-up mechanism is configured to lift the workpiece above the die when the punch recedes from the die. The delay device is configured to delay lifting movement of the pushing member in relation to receding movement of the punch when the punch recedes from the die.
    Type: Application
    Filed: March 5, 2020
    Publication date: September 17, 2020
    Applicant: TOYOTA BOSHOKU KABUSHIKI KAISHA
    Inventors: Shigeo SUMIYAMA, Yuta YAMAKITA, Taira ITO