Patents by Inventor Ritaro Konuma

Ritaro Konuma 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: 5993720
    Abstract: A method for manufacturing a container having a tubular-shaped intermediate barrel portion that is covered with a flexible film. The tubular-shaped intermediate barrel portion is disposed on a mandrel that functions as a die core. The mandrel is installed with the tubular-shaped intermediate barrel portion to an upper die and a lower die. One end of the intermediate barrel portion covers the mandrel with flexible film. Molten polymer material is injected into the upper and lower dies, forming solid portions at opposite ends of the pipe-shaped barrel portion.
    Type: Grant
    Filed: September 6, 1996
    Date of Patent: November 30, 1999
    Assignees: Kabushiki Kaisha Hosokawa Yoko, Kabushiki Kaisha Polymer Systems
    Inventors: Ritaro Konuma, Yoji Tanaka
  • Patent number: 5873970
    Abstract: A container is provided with: a main body formed in the shape of a pipe of flexible film, at least back end of which is closed; a reinforcing member disposed at the tip section of the main body for holding the form of the tip section and having a discharge aperture for discharging content contained in the main body; and a lid for closing the discharge aperture of the reinforcing member.
    Type: Grant
    Filed: August 27, 1997
    Date of Patent: February 23, 1999
    Assignees: Kabushi Kaisha Hosokawa Yoko, Kabushi Kaisha Polymer Systems
    Inventors: Ritaro Konuma, Yoji Tanaka
  • Patent number: 5593066
    Abstract: A container including a cylindrical main body having front and rear end portions opposite each other and being axially collapsible along the longitudinal axis thereof to discharge contents therein through the first end portion. The rear end portion is sealed, and a reinforcing member having a discharge aperture extending therethrough is secured to the front end portion of the cylindrical main body. Additionally, a lid is disposed on the reinforcing member to cover the discharge aperture.
    Type: Grant
    Filed: September 28, 1995
    Date of Patent: January 14, 1997
    Assignees: Kabushiki Kaisha Hosokawa Yoko, Kabushiki Kaisha Polymer Systems
    Inventors: Ritaro Konuma, Yoji Tanaka