Patents by Inventor Kenji Yasunaka

Kenji Yasunaka 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: 6080260
    Abstract: When producing a laminated metal sheet, the air bubbles taken in when laminating can be lessened so that a laminated metal sheet with low rate of air bubbles can be obtained. For this purpose, in a production method of a laminated metal sheet comprising the steps of laminating of plastic film 2 on at least one side of a metal sheet strip 1, the plastic film is heated to a temperature of between the glass transition temperature of the plastic film and a temperature at which the thermal shrinkage of the film attains 3% when the plastic film is kept for 30 minutes at a constant temperature, and just after the heating, the plastic film is brought into pressure contact with the metal sheet, by which laminated metal sheet in which air bubbles are hard to be taken in when laminating, and the rate of air bubbles is low can be obtained.
    Type: Grant
    Filed: April 30, 1998
    Date of Patent: June 27, 2000
    Assignee: Toyo Kohan Co., Ltd.
    Inventors: Kenji Yasunaka, Keisuke Takesue, Kenichi Miyata
  • Patent number: 6017599
    Abstract: A laminate of an oriented resin film and a metal sheet substrate is used in the manufacture of can stock, the intensity of orientation of the resin film being greater along the bottom of the can and lesser along the can side wall. This construction is obtained by locally cooling, during lamination, that part of the heated metal substrate which will become the bottom wall of the resultant can.
    Type: Grant
    Filed: February 1, 1996
    Date of Patent: January 25, 2000
    Assignee: Toyo Kohan Co., Ltd.
    Inventors: Yoshiki Sakamoto, Kenji Yasunaka, Atsuo Tanaka, Satoshi Iketaka
  • Patent number: 5992493
    Abstract: A method for a production of a laminated metal sheet which can reduce the ratio of pinholes being caused in a synthetic resin film (the incidence of pinholes) upon deep draw forming of the laminated metal sheet involves superimposing the heated metal sheet on the synthetic resin film unwound from a film roll, passing the heated metal sheet and the synthetic resin film through a pair of laminating rolls to laminate the two together, the laminating process being carried out in a laminating chamber in which the concentration of fine particles having a mean particle diameter exceeding 3 .mu.m is kept below 100 pieces/ft.sup.3.
    Type: Grant
    Filed: April 30, 1998
    Date of Patent: November 30, 1999
    Assignee: Toyo Kohan Co., Ltd.
    Inventors: Kenji Yasunaka, Keisuke Takesue, Tadashi Fujii
  • Patent number: 3982314
    Abstract: Tin coated steel sheet used for seamless steel containers by applying of a coating at least one material selected from the group consisting of nickel, cobalt, copper, nickel oxide, cobalt oxide, copper oxide, tin oxide, copper-tin compound, cobalt-copper compound, cobalt-copper compound, cobalt-nickel compound, nickel-copper compound, cobalt-tin compound, nickel-tin compound and nickel-sulfur compound, onto one or both of the surface of cold rolled and cleaned steel strip or sheet. The coated steel strip or sheet is then coated with tin, and the tin coating may then be flow-melted subsequently.
    Type: Grant
    Filed: July 9, 1975
    Date of Patent: September 28, 1976
    Assignee: Kozo Yoshizaki
    Inventors: Keiji Ariga, Tadashi Nemoto, Kenji Yasunaka