Patents by Inventor Fumihiko Nishizawa

Fumihiko Nishizawa 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).

  • Cooling drum for casting thin cast pieces and method and apparatus for forming dimples in peripheral surface of the drum
    Patent number: 5391856
    Abstract: A cooling drum for use in casting a thin cast strip is rotated about its axis while a laser beam having a wavelength of from 0.30 .mu.m to 1.07 .mu.m is irradiated onto a peripheral surface of the drum to form dimple therein. At this time, at least one of the oscillation period of the laser beam, the laser output and the divergence angle of the beam is controlled to assure that each dimple has a depth of no less than 50 .mu.m and a diameter of less than 500 .mu.m and the distance measured between the centers of each adjacent pair of dimples ranges from 1.05 times to 5 times the dimple diameter.
    Type: Grant
    Filed: September 9, 1992
    Date of Patent: February 21, 1995
    Assignee: Nippon Steel Corporation
    Inventors: Katsuhiro Minamida, Motoi Kido, Fumihiko Nishizawa