Patents by Inventor Katuyuki Naitou

Katuyuki Naitou 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).

  • Kneading degree adjusting device for twin extruder
    Patent number: 6238079
    Abstract: A cylinder 2 is formed with an upper guide bore 10a and a lower guide bore 10b at a position corresponding to a gate part B. Gate rods 7 are rotatably inserted through the guide bores 10a, 10b, respectively. Each of the gate rods 7 is formed with opening degree changing recesses in a form of an opencut adjacent to each other in an axial direction in order to constitute opening degree variable channels S in combination with opening degree variable channel forming parts 14 of two screws 3. Each of the recesses 11 consists of a first semicircular face 12 and a second semicircular face 13 in such a shape that an upstream side end of the first semicircular face 12 is diagonally cut.
    Type: Grant
    Filed: April 28, 2000
    Date of Patent: May 29, 2001
    Assignee: The Japan Steel Works, Ltd.
    Inventors: Satoru Watada, Katuyuki Naitou