Patents by Inventor Kinzo Miyamoto

Kinzo Miyamoto 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 of making polypropylene printing plate using paper matrix
    Patent number: 4297263
    Abstract: A method of making a polypropylene printing plate using a paper matrix in which a roll and an opposing member are prepared, a paper matrix is attached to one of the roll and opposing member, a crystalline ethylene-propylene copolymer having a MFI (melt flow index) of 3.about.10, containing ethylene less than 20% by weight and tensile yield strength of 220.about.330 kg/cm.sup.2 is continuously fed under molten state between the roll and the opposing member, and then the crystalline ethylene-propylene copolymer is pressed and cooled to be hardened.Further, a reproducing printing plates consists of a crystalline ethylene-propylene copolymer whose melt flow index is selected in a range of 3.about.10, which contains ethylene less than 20 weight % and which has the tensile yield strength of 220.about.330 kg/cm.sup.2.
    Type: Grant
    Filed: March 24, 1976
    Date of Patent: October 27, 1981
    Assignees: Mitsui Toatsu Chemicals Inc., Kabushikikaisha Asahi Shinbunsha
    Inventors: Kinzo Miyamoto, Takayasu Tanaka, Yoshimi Inoue