Patents by Inventor Ikuo Seki

Ikuo Seki 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).

  • Publication number: 20200123369
    Abstract: A thermoplastic fluororesin composite that is excellent in mechanical property and heat resistance, and an electric wire and a cable using the thermoplastic fluororesin composite are provided. A method of manufacturing a thermoplastic fluororesin composite includes: a step (double bond forming step) of kneading a mixture containing a fluoro-rubber, a compatibilizer and a crosslinking accelerator to form a double bond in the fluoro-rubber by dehydrofluorination reaction; a step (fluororesin kneading step) of kneading a first product generated in the double bond forming step and a fluororesin; and a step (dynamic crosslinking step) of kneading a second product generated in the fluororesin kneading step and a polyol crosslinker to dynamically crosslink the fluoro-rubber in the second product.
    Type: Application
    Filed: October 9, 2019
    Publication date: April 23, 2020
    Inventors: Ikuo SEKI, Takashi AOYAMA, Tomiya ABE, Ryutaro KIKUCHI
  • Patent number: 4770937
    Abstract: A fluorine-containing elastomeric electric insulating material is disclosed. The material is a vulcanized product of a composition comprising 100 parts by weight of a fluorine-containing elastomeric copolymer having a number average molecular weight of from 20,000 to 60,000, containing as major components a unit based on tetrafluoroethylene and a unit based on an .alpha.-olefin having 2 to 4 carbon atoms and exhibiting rubber elasticity at room temperature, 0.1 to 5 parts by weight of an organic peroxide and 0.1 to 20 parts by weight of a polyallyl compound.
    Type: Grant
    Filed: June 15, 1987
    Date of Patent: September 13, 1988
    Assignees: Hitachi Cable, Ltd., Asahi Glass Co., Ltd.
    Inventors: Hideki Yagyu, Ikuo Seki, Mituharu Morozumi, Yasumichi Ito, Rikichi Koike
  • Patent number: 4250522
    Abstract: A color separation condition determining apparatus which is useful for determining the operation conditions of the color separation step in a color printing process, comprises a scanning section, a masking circuit, an under-color removal circuit, clip circuits, gradation a correction circuit, color correction circuit, a matrix circuit and a color monitor using a color CRT. The invention further includes a method for correcting color signals in the above apparatus and a masking circuit therefor.
    Type: Grant
    Filed: January 17, 1979
    Date of Patent: February 10, 1981
    Assignee: Toppan Printing Co., Ltd.
    Inventors: Ikuo Seki, Masahiko Kato
  • Patent number: 4123171
    Abstract: A density measuring device for easily and quickly measuring the optical densities of original pictures which is characterized in that an original picture is scanned by a scanning device to obtain electrical signals of the original picture, the signals are then converted into secondary electrical signals corresponding to the optical density of the original picture by means of a logarithmic converting circuit, calibration signals generated by a calibration signal generator are added to the secondary electrical signals, and thus obtained combined signals are displayed on a wave-form monitor.
    Type: Grant
    Filed: September 16, 1976
    Date of Patent: October 31, 1978
    Assignee: Toppan Printing Co., Ltd.
    Inventors: Masahiko Kato, Hisao Katogi, Ikuo Seki
  • Patent number: 3972066
    Abstract: A method for image regulation of a color monitor in proof-viewing and an apparatus therefor which is characterized in that the image on the color monitor is caused to closely resemble the printed picture, and said method comprises the steps of: scanning separation films of primary colors to obtain primary color picture signals; obtaining secondary color picture signals from the NAM (Non-Additively Mixing) portions which are derived by detecting the maximum value of two of said primary color picture signals respectively; while obtaining a tertiary color picture signal from the NAM portion of said primary color picture signals; regulating said secondary and tertiary color picture signals by multiplying regulation factors; correcting the gradation of said primary color picture signals by said regulated secondary and tertiary color picture signals; and producing an image on a color monitor screen with said corrected primary color picture signals.
    Type: Grant
    Filed: December 19, 1974
    Date of Patent: July 27, 1976
    Assignees: Toppan Printing Co., Ltd., Hitachi Electronics Ltd.
    Inventors: Ikuo Seki, Masahiko Kato