Patents by Inventor Tomio Oki

Tomio Oki 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: 5384180
    Abstract: The present invention relates to a recording medium which has an electroconductive layer which exhibits strong stable resistance to humidity and water, and provides high precision visual images and color reproduction of superior quality. The electroconductive substrate comprises an electroconductive layer on at least one side, wherein the electroconductive layer contains an electroconductive pigment, a normal salt and a binder; the binder contains 20 to 85 weight % of starch and the normal salt is maintained at 10 to 100 parts by weight with respect to 100 parts by weight of said electroconductive pigment. The recording medium comprises a recording layer which is formed on the electroconductive layer described above, and may contain silicone resin particles therein for further improvement of high prevision visual images.
    Type: Grant
    Filed: August 27, 1993
    Date of Patent: January 24, 1995
    Assignee: Tomoegawa Paper Co., Ltd.
    Inventors: Tomio Oki, Kiyoshi Iwamoto
  • Patent number: 5234746
    Abstract: A conductive substrate and electrostatic recording media which incorporates such a conductive substrate are disclosed. The disclosed conductive substrate and recording media are applicable to electrostatic recording processes, electrophotographic printing processes and the like, and demonstrate excellent resistance to damage by water and other environmental factors. The conductive substrate of the present invention includes a substrate layer with at least one surface thereof having a conductive layer formed thereover. The above mentioned conductive layer has as a principle component an acryl type copolymer formed from polymerizable vinyl monomer of the type shown in chemical structural diagram 1 below in an amount of 10 to 45% by weight of the acryl type copolymer, and at least one other type of polymerizable vinyl monomer, ##STR1## such that in chemical structural diagram 1, R.sub.1 represents a hydrogen atom or a methyl group, R.sub.2 represents an alkylene group, R.sub.3, R.sub.4 and R.sub.
    Type: Grant
    Filed: May 16, 1991
    Date of Patent: August 10, 1993
    Assignee: Tomoegawa Paper Co., Ltd.
    Inventors: Kiyoshi Iwamoto, Tomio Oki, Keno Kamimura
  • Patent number: 5122411
    Abstract: An electrostatic recording material comprising a conductive having on at least one side thereof an electroconductive layer and a recording layer in this order is disclosed, wherein said support is made of fabric having a weaving density of at least 30 yarns/cm and a weaving interstice of not more than 150 .mu.m. The recording material exhibits satisfactory recording characteristics and excellent durability, while having a feeling inherent to the fabric.
    Type: Grant
    Filed: August 1, 1990
    Date of Patent: June 16, 1992
    Assignee: Tomoegawa Paper Co., Ltd.
    Inventors: Kiyoshi Iwamoto, Tomio Oki, Yoshiaki Kaburaki, Keno Kamimura