Patents by Inventor Keiiti Tutikawa

Keiiti Tutikawa 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).

  • Slip sheet for a planographic printing plate, production process thereof and a protected planographic printing plate and laminate thereof
    Patent number: 7754411
    Abstract: The present invention provides a slip sheet that protects a planographic printing plate in which the coefficient of static friction between corresponding surfaces of the slip sheet that contact an image-forming surface of the planographic printing plate is 0.35 or less, the surface strength of the slip sheet is 15 or more, or the Clark stiffness of the slip sheet is 20 to 50. In a production process of the planographic printing plate, the image-forming surface and the slip sheet are adhered by suitably charging, and following their lamination, the charge rapidly dissipates resulting in favorable separation, discharge characteristics and storage characteristics in an automatic plate feeder. In addition, sticking between the slip sheet and the image-forming surface during heat treatment can also be prevented simultaneously. This slip sheet is particularly effective for planographic printing plates of the heat mode type and photon mode type on which images are formed by exposure to laser light.
    Type: Grant
    Filed: February 27, 2003
    Date of Patent: July 13, 2010
    Assignee: Tokushu Paper Mfg. Co., Ltd.
    Inventors: Keiiti Tutikawa, Katsuhiko Hidaka, Masao Akamatsu, Takeshi Kaneda
  • Lining board for lithographic plate and its manufacturing method. and protected lithographic plate and its stack
    Publication number: 20060014102
    Abstract: The present invention provides a slip sheet that protects a planographic printing plate in which the coefficient of static friction between corresponding surfaces of the slip sheet that contact an image-forming surface of the planographic printing plate is 0.35 or less, the surface strength of the slip sheet is 15 or more, or the Clark stiffness of the slip sheet is 20 to 50. In a production process of the planographic printing plate, the image-forming surface and the slip sheet are adhered by suitably charging, and following their lamination, the charge rapidly dissipates resulting in favorable separation, discharge characteristics and storage characteristics in an automatic plate feeder. In addition, sticking between the slip sheet and the image-forming surface during heat treatment can also be prevented simultaneously. This slip sheet is particularly effective for planographic printing plates of the heat mode type and photon mode type on which images are formed by exposure to laser light.
    Type: Application
    Filed: February 27, 2003
    Publication date: January 19, 2006
    Inventors: Keiiti Tutikawa, Katsuhiko Hidaka, Masao Akamatsu, Takashi Kaneda