Patents by Inventor Yutaka Nakama

Yutaka Nakama 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).

  • Coating method using extrusion die having predetermined gap
    Patent number: 5922408
    Abstract: A first downstream lip 25 and a second downstream lip 26 are formed with coating work surfaces 34, 35 facing a web 21 and making contact with coating liquid 22A, 22B, a ratio h/G between a gap G defined between the downstream end X of the coating work surface of the first downstream lip and the web. A film thickness h of a lower layer coating film 33A which is extruded from a fist slot part 27 located upstream from the first downstream lip, and which has not yet been dried, is set in the following range:0.4<h/G<0.5.
    Type: Grant
    Filed: April 4, 1997
    Date of Patent: July 13, 1999
    Assignee: Kao Corporation
    Inventors: Yutaka Nakama, Eiten Chin
  • Device and method for coating a web with a liquid
    Patent number: 5418004
    Abstract: In an extrusion type coating device 10, an upstream lip 12 of a coating head 11 is provided with a chamfer with a slot side edge B thereof as a start point. A contact line L drawn from the upstream lip 12 to a downstream lip 13 defines an angle .theta. with a line segment OB with respect to a point O of contact between the contact line and the upstream lip 12 such that the angle .theta. is O<.theta.<45 degrees.
    Type: Grant
    Filed: November 23, 1993
    Date of Patent: May 23, 1995
    Assignee: Kao Corporation
    Inventors: Eiten Chin, Toshiharu Numata, Toshiki Takeuchi, Yutaka Nakama