Patents by Inventor Fumihiro Tsutsumi

Fumihiro Tsutsumi 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).

  • Method and apparatus for measuring metal exposure in resin covering portion in metal container and constituent member thereof
    Patent number: 4846936
    Abstract: Disclosed is a method for measuring the metal exposure in a resin covering area of a metal container or a constituent member thereof, which comprises contacting the resin covering area of the metal container or the constituent member thereof with a measuring electrode through an electrolytic solution, relatively moving the resin covering area and the measuring electrode in a certain direction while always holding the electrolytic solution between the measuring electrode and the resin covering area, measuring a leak current between the metal substrate of the metal container or constituent member at predetermined pitches and detecting the metal exposure of the resin covering area as leak currents at respective parts discriminately.According to this measuring method, the degree of the metal exposure can be easily measured as the leak current at respective parts discriminately, and statistical processing of the measured leak current values can be easily performed.
    Type: Grant
    Filed: August 12, 1987
    Date of Patent: July 11, 1989
    Assignee: Toyo Seikan Kaisha, Ltd.
    Inventors: Michiko Tsurumaru, Yukio Suzuki, Fumihiro Tsutsumi, Masato Ashina, Hironori Kobayashi