Patents by Inventor Yo Ito

Yo Ito 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: 4698272
    Abstract: An extra-low iron loss grain oriented silicon steel sheet comprises a base metal of silicon steel and a thin coat of nitride or carbide of Ti, Zr, Hf, V, Nb, Ta, Mn, Cr, Mo, W, Co, Ni, Al, B and Si and strongly adhered to a finished surface of the base metal through a mixed layer of the base metal and the thin coat, and has excellent electrical and magnetic properties as well as good compressive stress dependence of magnetostriction and lamination factor.
    Type: Grant
    Filed: February 21, 1986
    Date of Patent: October 6, 1987
    Assignee: Kawasaki Steel Corporation
    Inventors: Yukio Inokuti, Yo Ito
  • Patent number: 4690855
    Abstract: A substrate for print circuit board comprising a steel sheet, a forsterite film layer formed on at least one surface of the steel sheet, and an insulating film layer formed on the forsterite film layer by baking a coating solution mainly consisting of a phosphate and colloidal silica. A print circuit board having a conductive pattern on the insulating film layer of the substrate for print circuit board, and methods of manufacturing the substrate and the print circuit board. One of typical methods of manufacturing the substrate for print circuit board comprises steps of applying an annealing separator mainly consisting of MgO on the steel sheet and annealing it to form a forsterite film layer, applying and baking a coating solution mainly consisting of the phosphate and colloidal silica onto the forsterite film layer to form an insulating film layer. The print circuit board is obtained by bonding the conductive pattern to the insulating film layer and annealing at a temperature range of not lower than 300.
    Type: Grant
    Filed: September 10, 1986
    Date of Patent: September 1, 1987
    Assignee: Kawasaki Steel Corporation
    Inventors: Yukio Inokuti, Shigeko Ikeda, Toshihiko Funahashi, Yo Ito
  • Patent number: 4579608
    Abstract: Grain oriented silicon steel sheets having a very low iron loss W.sub.17/50 of lower than 0.90 W/kg, in which Si content is 2-4%, are produced by containing at least one of Se and S in an amount of 0.010-0.035% and at least one of Sb, As, Bi and Sn in an amount of 0.010-0.080% as inhibitor, making a final gauge to be 0.15-0.25 mm, forsterite coating formed on the steel sheet surfaces in the final annealing to be 1-4 g/m.sup.2 per one surface and a secondary crystallized grain size to be 1-6 mm.
    Type: Grant
    Filed: December 1, 1983
    Date of Patent: April 1, 1986
    Assignee: Kawasaki Steel Corporation
    Inventors: Yoh Shimizu, Hiroshi Shishido, Yo Ito, Hiroshi Shimanaka
  • Patent number: 4576658
    Abstract: A method for obtaining grain-oriented silicon steel sheet with a very high magnetic flux density and a very low core loss by setting specific conditions for the decarburization and primary recrystallization annealing step within the series of steps performed for the manufacture of the grain-oriented silicon steel sheet. This method consists of setting the rate of temperature rise in the decarburization and primary recrystallization annealing step at no less than 10.degree. C./sec, dividing the decarburization and primary recrystallization annealing step into a first half and a second half, and restricting the temperature, time, and ratio P.sub.H.sbsb.2.sub.O /P.sub.H.sbsb.2 of the partial pressure of H.sub.2 O to the partial pressure of H.sub.2 of the atmosphere for each of these two halves within certain predefined ranges.
    Type: Grant
    Filed: November 30, 1984
    Date of Patent: March 18, 1986
    Inventors: Yukio Inokuti, Yasuhiro Kobayashi, Yo Ito
  • Patent number: 4565240
    Abstract: Pressure is exerted on the interior of casting rolls with a negative crown so that the rolls may maintain a true cylindrical surface without any crown when the continuous casting operation is initiated. When the cylindrical surface of the rolls is heated by molten metal as the continuous casting operation continues, the interior pressure of the rolls is decreased, whereby the rolls may maintain a true cylindrical surface without any crown.
    Type: Grant
    Filed: July 25, 1985
    Date of Patent: January 21, 1986
    Assignees: Kawasaki Seitetsu Kabushiki Kaisha, Ishikawajima-Harima Jukogyo Kabushiki Kaisha
    Inventors: Kiyoshi Shibuya, Takahiro Kan, Yo Ito, Hiroshi Shimanaka, Yoshiaki Tanaami
  • Patent number: 4546814
    Abstract: A process and an apparatus for producing rapidly solidified metallic tapes by a double-roll system are disclosed, wherein molten metal is poured into a kissing region defined between a fixed cooling roll and a movable cooling roll through a nozzle located thereabove and rapidly solidified at the kissing region to form a metallic tape. In this case, pushing forces added to the movable cooling roll by hydraulic cylinders at driving and operational sides are controlled by adding to or subtracting from a standard pushing force an adjusting quantity of the pushing force as a function of a difference between a roll gap at the driving side and a roll gap at the operational side.
    Type: Grant
    Filed: May 23, 1983
    Date of Patent: October 15, 1985
    Assignee: Kawasaki Steel Corporation
    Inventors: Kiyoshi Shibuya, Masao Yukumoto, Takahiro Kan, Yo Ito
  • Patent number: 4518029
    Abstract: A double roll type method and apparatus for producing a thin metallic sheet by pouring a molten metal of a desired composition into a kissing region between two cooling rolls rotating in opposite directions, and rapidly cooling and solidifying the molten metal while it passes through the kissing region. The thin sheet which has come out of the kissing region is forcibly deflected by gas from a gas applying head and by a pair of pinch rolls so as to make close contact with one of the two cooling rolls over a predetermined region in the circumferential direction of the roll.
    Type: Grant
    Filed: November 26, 1982
    Date of Patent: May 21, 1985
    Assignee: Kawasaki Steel Corporation
    Inventors: Kiyoshi Shibuya, Takahiro Kan, Yo Ito
  • Patent number: 4505745
    Abstract: A method of producing amorphous mother alloy is disclosed, which comprises charging raw material, carbonaceous reducing agent and secondary material into a smelting furnace and then smelting to produce Fe-B-Si series molten metal having a B-Si composition range which lies within an area represented by the trapezoidal area abcd shown in FIG. 2 of the accompanying drawings. The amorphous mother alloy is used to produce an amorphous starting material by diluting with molten steel.
    Type: Grant
    Filed: August 18, 1983
    Date of Patent: March 19, 1985
    Assignee: Kawasaki Steel Corporation
    Inventors: Takao Hamada, Nobuo Tsuchiya, Yo Ito, Toshihiro Inatani, Yoshiyasu Takada, Mitsuo Sumito, Toshimitsu Koitabashi, Hideshi Katayama
  • Patent number: 4469533
    Abstract: Grain oriented silicon steel sheets or strips having high magnetic induction and ultra-low iron loss can be obtained by the intermediate annealing cycle containing a rapid heating and rapid cooling just before final cold rolling, wherein a first cold rolled sheet is rapidly heated from 500.degree. C. to 900.degree. C. at a heating rate of at least 50.degree. C./sec and the steel sheet heated in the intermediate annealing is rapidly cooled from 900.degree. C. to 500.degree. C. at a cooling rate of at least 5.degree. C./sec.
    Type: Grant
    Filed: August 18, 1983
    Date of Patent: September 4, 1984
    Assignee: Kawasaki Steel Corporation
    Inventors: Yukio Inokuti, Yo Ito, Hiroshi Shimanaka
  • Patent number: 4397691
    Abstract: Fe-B molten metal for producing amorphous alloys are produced in a low cost by using a vertical furnace wherein beds packed with a carbonaceous solid reducing agent are formed and two or three stages of tuyeres are provided in the lower portion of said furnace, feeding a preliminarily reduced powdery iron ore into the furnace through the upper stage of tuyeres together with hot air and feeding boron oxide or boric acid into the furnace through the lower stage of tuyeres together with hot air and, if necessary blowing hot air into the furnace through the lowest stage of tuyeres. In stead of the above described vertical furnace, a usual blast furnace provided with one or two stages of tuyeres at the lower portion of said furnace is used. In this case, sintered iron ore, pellet-formed iron ore or lump iron ore is fed from the top of the furnace and powdery boron oxide or boric acid is fed through the tuyeres.
    Type: Grant
    Filed: July 22, 1982
    Date of Patent: August 9, 1983
    Assignee: Kawasaki Steel Corporation
    Inventors: Takao Hamada, Nobuo Tsuchiya, Toshihiro Inatani, Yoshiyasu Takada, Mitsuo Sumito, Eiji Katayama, Toshimitsu Koitabashi, Kyoji Okabe, Yo Ito
  • Patent number: 4001052
    Abstract: Hot-rolled low-carbon steel strip with an excellent press-workability capable of forming a smooth pressed surface consisting essentially of up to 0.12 wt. % carbon, up to 0.01 wt. % nitrogen, up to 0.0094 wt. % boron, and other specific optional ingredients, the B(%)/N(%) ratio being 0.3 to 0.94. The micrograin size number, JIS, of ferrite in the steel strip as hot-rolled is 7 to 9. The steel strip is made by hot-rolling while controlling the temperatures at the entry and delivery ends of a hot-strip finishing mill.
    Type: Grant
    Filed: November 13, 1974
    Date of Patent: January 4, 1977
    Assignee: Kawasaki Steel Corporation
    Inventors: Yoshio Nakazato, Masatoshi Nakazawa, Nobuo Ohashi, Yo Ito
  • Patent number: 3950191
    Abstract: Steel sheets having an excellent enamelability are produced by adjusting the carbon, silicon, manganese, aluminum, oxygen and boron contents in a molten steel to be not more than 0.020% of carbon, not more than 0.03% of silicon, not more than 0.50% of manganese, not more than 0.010% of aluminum, nor more than 0.050% of oxygen, boron within a range of 0.003-0.020% being in such an amount B(%).times.0(%) of more than 1.times.10.sup..sup.-5 and the remainder being inevitable impurities and iron, and hot rolling the resulting steel, cold rolling the steel and subjecting to a recrystallization annealing in a conventional manner.
    Type: Grant
    Filed: October 21, 1974
    Date of Patent: April 13, 1976
    Assignee: Kawasaki Steel Corporation
    Inventors: Kenji Ito, Isao Takahashi, Yo Ito, Takuo Imai, Fumio Kosumi, Hideo Kuguminato