Patents by Inventor Hitoshi Katsumata

Hitoshi Katsumata 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).

  • Process for producing cast-coated papers
    Patent number: 5043190
    Abstract: Cast-coated papers having high surface gloss, smoothness and high surface strength are produced by applying an aqueous pigment coating onto the surface of a base paper, drying the applied pigment coating to form a cast-coated layer, rewetting the pigment coating layer with a rewetting solution, pressing the rewetted pigment coating layer into contact with a heated, highly polished drum to impart a high gloss surface, the rewetting solution containing a dispersant and/or a release agent as its main components and having its pH adjusted to be between 2 and 4 by incorporation of at least one carboxylic acid selected from the group consisting of formic acid, acetic acid, tartatic acid, citric acid, lactic acid, succinic acid, malic acid and benzoic acid.
    Type: Grant
    Filed: April 24, 1990
    Date of Patent: August 27, 1991
    Assignee: Nippon Kakoh Saishi K.K.
    Inventors: Hitoshi Katsumata, Tetsuya Matsumoto, Hirosi Aizawa, Taiji Nakajima, Kouichi Nagai