Patents by Inventor Itsuji Koyama

Itsuji Koyama 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 finishing coated papers
    Patent number: 4277524
    Abstract: An aqueous coating composition containing thermoplastic synthetic resin emulsion is applied to a paper web to form a coating layer and dried at a temperature to maintain the coating layer below the glass transition temperature of the thermoplastic synthetic resin emulsion. The coated paper web is passed on a finishing roll having a mirror-like metal surface heated to a temperature above the glass transition temperature of the emulsion. The surface of the coating layer of the coated paper web is brought into pressing contact with the finishing roll and heated to a temperature above the glass transition temperature of the emulsion, while the coated paper web is passed on the finishing roll. The coated paper web is cooled until the temperature of the surface of the coating layer is reduced to a level not exceeding the glass transition temperature of the emulsion by 30.degree. C.
    Type: Grant
    Filed: December 26, 1979
    Date of Patent: July 7, 1981
    Assignee: Mitsubishi Paper Mills, Ltd.
    Inventors: Hideiku Nakajima, Itsuji Koyama, You Kusama, Yutaka Ashie