Patents by Inventor Shuichi Nakamura
Shuichi Nakamura 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).
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Patent number: 11939641Abstract: A grain oriented electrical steel sheet includes the texture aligned with Goss orientation. In the grain oriented electrical steel sheet, when (?1 ?1 ?1) and (?2 ?2 ?2) represent deviation angles of crystal orientations measured at two measurement points which are adjacent on the sheet surface and which have an interval of 1 mm, the boundary condition BA is defined as [(?2??1)2+(?2??1)2+(?2??1)2]1/2?0.5°, and the boundary condition BB is defined as [(?2??1)2+(?2??1)2+(?2??1)2]1/2?2.0°, the boundary which satisfies the boundary condition BA and which does not satisfy the boundary condition BB is included.Type: GrantFiled: July 31, 2019Date of Patent: March 26, 2024Assignee: NIPPON STEEL CORPORATIONInventors: Shuichi Nakamura, Yusuke Kawamura, Shota Morimoto
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Patent number: 11884988Abstract: In a base sheet for a grain-oriented electrical steel sheet of the present invention, an amount of surface oxygen x per one surface of the base sheet and a value y of a peak (?R/R0 @1250 cm?1) of SiO2 on the surface of the base sheet obtained by infrared reflection spectroscopy satisfy y?1500x2.5 and y?0.24. A method of manufacturing the base sheet for a grain-oriented electrical steel sheet of the present invention includes: adjusting the amount of surface oxygen per one surface of a final-annealed grain-oriented silicon steel sheet to more than 0.01 g/m2 and 0.05 g/m2 or less, or more than 0.05 g/m2 and 0.10 g/m2 or less; and performing thermal oxidation annealing in an atmosphere in which an oxidation potential represented by a ratio PH2O/PH2 of water vapor pressure to hydrogen pressure is 0.0081 or less in a case where the amount of surface oxygen is more than 0.01 g/m2 and 0.05 g/m2 or less, or in an atmosphere in which the oxidation potential is 0.Type: GrantFiled: July 13, 2018Date of Patent: January 30, 2024Assignee: NIPPON STEEL CORPORATIONInventors: Shuichi Nakamura, Seiki Takebayashi, Yoshiyuki Ushigami, Shinsuke Takatani, Hiroyasu Fujii
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Patent number: 11851726Abstract: A grain oriented electrical steel sheet includes the texture aligned with Goss orientation. In the grain oriented electrical steel sheet, when (?1 ?1 ?1) and (?2 ?2 ?2) represent deviation angles of crystal orientations measured at two measurement points which are adjacent on the sheet surface and which have an interval of 1 mm, the boundary condition BA is defined as |?2??1|?0.5°, and the boundary condition BB is defined as [(?2??1)2+(?2??1)2+(?2??1)2]1/2?2.0°, the boundary which satisfies the boundary condition BA and which does not satisfy the boundary condition BB is included.Type: GrantFiled: July 31, 2019Date of Patent: December 26, 2023Assignee: NIPPON STEEL CORPORATIONInventors: Shuichi Nakamura, Yusuke Kawamura, Shingo Okada, Tomoaki Ito, Shinya Yano
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Publication number: 20230386727Abstract: This wound core is a wound core including a substantially rectangular wound core main body in a side view, wherein, in the wound core main body, first planar portions and corner portions are alternately continuous in a longitudinal direction, each corner portion has a curved shape in a side view of the grain-oriented electrical steel sheet, two or more bent portions having a second planar portion between the adjacent bent portions are provided, and in at least one of the first planar portion and second planar portion in the vicinity of the bent portion, the following Formula (1) is satisfied: (Nac+Nal)/Nt?0.010??(1) here, Nt is a total number of grain boundary determination locations in the first planar portion and second planar portion region adjacent to the bent portion, and Nac and Nal each are a number of determination location at which subgrain boundaries are able to be identified in a direction parallel to and direction perpendicular to the bent portion boundary.Type: ApplicationFiled: October 26, 2021Publication date: November 30, 2023Applicant: NIPPON STEEL CORPORATIONInventor: Shuichi NAKAMURA
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Publication number: 20230309214Abstract: An electronic device that is capable of keeping the impedance (ground impedance) between a printed circuit board and a shield case low. The electronic device includes a printed circuit board that has ground layer(s) which is conductive and is provided at a location in the thickness direction of the printed circuit board, and the shield case which is disposed on one side of the printed circuit board and consists of a hollow body that has conductivity. A through hole(s) passing through the ground layer is formed in the printed circuit board. A projecting portion(s), which is inserted into the through hole(s), is formed in a projecting manner in the shield case. In a state of being inserted in the through hole(s), the projecting portion(s) is electrically connected to the ground layer via solder.Type: ApplicationFiled: March 8, 2023Publication date: September 28, 2023Inventor: SHUICHI NAKAMURA
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Patent number: 11753691Abstract: A grain oriented electrical steel sheet includes the texture aligned with Goss orientation. In the grain oriented electrical steel sheet, when (?1 ?1 ?1) and (?2 ?2 ?2) represent deviation angles of crystal orientations measured at two measurement points which are adjacent on the sheet surface and which have an interval of 1 mm, the boundary condition BA is defined as |?2??1|?0.5°, and the boundary condition BB is defined as [(?2??1)2+(?2??1)2+(?2??1)2]1/2?2.0°, the boundary which satisfies the boundary condition BA and which does not satisfy the boundary condition BB is included.Type: GrantFiled: July 31, 2019Date of Patent: September 12, 2023Assignee: NIPPON STEEL CORPORATIONInventors: Shuichi Nakamura, Yusuke Kawamura
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Publication number: 20230084111Abstract: A grain oriented electrical steel sheet includes the texture aligned with Goss orientation. In the grain oriented electrical steel sheet, when a grain size RA?C, a grain size RA?C, and a grain size RA?C are defined in a transverse direction C, the grain sizes satisfy RA?C<RA?C and RA?C<RA?C.Type: ApplicationFiled: February 5, 2020Publication date: March 16, 2023Applicant: NIPPON STEEL CORPORATIONInventors: Shuichi NAKAMURA, Yusuke KAWAMURA
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Patent number: 11605988Abstract: A method for manufacturing a laminated iron core includes providing a plurality of annular iron core piece rows, each of which is configured by annularly arranging a plurality of divided iron core pieces including yokes and teeth, and the yokes of the annularly-adjacent divided iron core pieces in the annular iron core piece row are mutually different in shape. In the method, the annular iron core piece rows are laminated by changing a rotational angle of the newly laminated annular iron core piece row relatively to the lastly laminated annular iron core piece row laminated so that the divided iron core piece with a shape different from that of the divided iron core piece is laminated on the lastly laminated divided iron core piece.Type: GrantFiled: January 18, 2018Date of Patent: March 14, 2023Assignee: MITSUI HIGH-TEC, INC.Inventors: Shuichi Nakamura, Daisuke Momota
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Publication number: 20230071853Abstract: A grain oriented electrical steel sheet includes the texture aligned with Goss orientation. In the grain oriented electrical steel sheet, when a grain size RA?L, a grain size RA?L, and a grain size RA?L are defined in a rolling direction L, the grain sizes satisfy RA?L<RA?L and RA?L<RA?L.Type: ApplicationFiled: February 5, 2020Publication date: March 9, 2023Applicant: NIPPON STEEL CORPORATIONInventors: Shuichi NAKAMURA, Yusuke KAWAMURA
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Patent number: 11513450Abstract: An image forming apparatus includes: a photoconductor; an optical scanner configured to cause a plurality of light beams to scan simultaneously on a surface of the photoconductor; a pixel size calculator configured to calculate a pixel size corresponding to a scanning position of each of the light beams; a light-quantity value quantization converter configured to quantize a light-quantity value corresponding to the scanning position of each of the light beams; a storage configured to store conversion data for conversion from image density data into a light beam driving signal; a signal converter configured to perform, with the conversion data, conversion from the image density data into the light beam driving signal; a selector configured to select the conversion data, according to the pixel size calculator and the light-quantity value quantization converter; and a light source configured to emit the plurality of light beams, based on driving data obtained through conversion by a driving data converter with tType: GrantFiled: February 4, 2022Date of Patent: November 29, 2022Assignee: Canon Kabushiki KaishaInventor: Shuichi Nakamura
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Publication number: 20220372589Abstract: A grain oriented electrical steel sheet includes the texture aligned with Goss orientation. In the grain oriented electrical steel sheet, when (?1 ?1 ?1) and (?2 ?2 ?2) represent deviation angles of crystal orientations measured at two measurement points which are adjacent on the sheet surface and which have an interval of 1 mm, the boundary condition BA is defined as |?2??1|?0.5°, and the boundary condition BB is defined as [(?2??1)2+(?2??1)2+(?2??1)2]1/2?2.0°, the boundary which satisfies the boundary condition BA and which does not satisfy the boundary condition BB is included.Type: ApplicationFiled: July 31, 2019Publication date: November 24, 2022Applicant: NIPPON STEEL CORPORATIONInventors: Shuichi NAKAMURA, Yusuke KAWAMURA
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Patent number: 11450460Abstract: A grain-oriented electrical steel sheet includes: a base steel sheet; an intermediate layer arranged in contact with the base steel sheet; and an insulation coating arranged in contact with the intermediate layer to be an outermost surface, in which the intermediate layer has a local oxidized area when viewing a cross section whose cutting direction is parallel to a thickness direction, and a thickness of the intermediate layer in an area where the local oxidized area is included is 50 nm or more, and a thickness of the intermediate layer in an area where the local oxidized area is not included is less than 50 nm.Type: GrantFiled: July 13, 2018Date of Patent: September 20, 2022Assignee: NIPPON STEEL CORPORATIONInventors: Seiki Takebayashi, Shuichi Nakamura, Hiroyasu Fujii, Yoshiyuki Ushigami, Shinsuke Takatani
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Publication number: 20220269191Abstract: An image forming apparatus includes: a photoconductor; an optical scanner configured to cause a plurality of light beams to scan simultaneously on a surface of the photoconductor; a pixel size calculator configured to calculate a pixel size corresponding to a scanning position of each of the light beams; a light-quantity value quantization converter configured to quantize a light-quantity value corresponding to the scanning position of each of the light beams; a storage configured to store conversion data for conversion from image density data into a light beam driving signal; a signal converter configured to perform, with the conversion data, conversion from the image density data into the light beam driving signal; a selector configured to select the conversion data, according to the pixel size calculator and the light-quantity value quantization converter; and a light source configured to emit the plurality of light beams, based on driving data obtained through conversion by a driving data converter with tType: ApplicationFiled: February 4, 2022Publication date: August 25, 2022Inventor: Shuichi Nakamura
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Patent number: 11346005Abstract: A grain-oriented electrical steel sheet includes: a base steel sheet; an intermediate layer arranged in contact with the base steel sheet; and an insulation coating arranged in contact with the intermediate layer to be an outermost surface, in which the insulation coating has a crystalline phosphide-containing layer containing a crystalline phosphide in an area in contact with the intermediate layer when viewing a cross section whose cutting direction is parallel to a thickness direction.Type: GrantFiled: July 13, 2018Date of Patent: May 31, 2022Assignee: NIPPON STEEL CORPORATIONInventors: Seiki Takebayashi, Shuichi Nakamura, Hiroyasu Fujii, Yoshiyuki Ushigami, Shinsuke Takatani
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Publication number: 20220119905Abstract: A method for producing a grain oriented electrical steel sheet includes a decarburization annealing process where an oxidation degree PH2O/PH2 is controlled, an annealing separator applying process where a mass ratio of MgO and Al2O3 in an annealing separator is controlled, a final annealing process where an oxidation degree is controlled when atmosphere includes hydrogen or a dew point is controlled when atmosphere consists of inert gas, and an insulation coating forming process where a baking temperature and a heat treatment temperature are controlled.Type: ApplicationFiled: January 16, 2020Publication date: April 21, 2022Applicant: NIPPON STEEL CORPORATIONInventors: Shinsuke TAKATANI, Yoshiyuki USHIGAMI, Shuichi NAKAMURA, Shohji NAGANO, Shunsuke OKUMURA
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Publication number: 20220112573Abstract: A method for producing a grain oriented electrical steel sheet includes a decarburization annealing process where an oxidation degree PH2O/PH2 is controlled, an annealing separator applying process where a mass ratio of MgO and Al2O3 in an annealing separator is controlled, a final annealing process where an oxidation degree is controlled when atmosphere includes hydrogen or a dew point is controlled when atmosphere consists of inert gas, and an insulation coating forming process where a baking temperature and a heat treatment temperature are controlled.Type: ApplicationFiled: January 16, 2020Publication date: April 14, 2022Applicant: NIPPON STEEL CORPORATIONInventors: Shinsuke TAKATANI, Yoshiyuki USHIGAMI, Shuichi NAKAMURA, Shunsuke OKUMURA, Shohji NAGANO
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Publication number: 20220098694Abstract: A method for manufacturing a grain-oriented electrical steel sheet includes: a silicon steel material production process of producing a silicon steel material; a hot rolling process of obtaining a hot rolled sheet by subjecting the silicon steel material to hot rolling; a cold rolling process of obtaining a steel sheet of a final sheet thickness by subjecting the hot rolled sheet to a single cold rolling process or multiple cold rolling processes having intermediate annealing performed between the cold rolling processes; a decarburization annealing process of subjecting the steel sheet to decarburization annealing; and a final annealing process of applying an annealing separator containing alumina as a main component to the steel sheet and subjecting the steel sheet to final annealing. The silicon steel material contains: in terms of mass %, Si: 0.8 to 7.0%; C: 0.085% or less; acid-soluble Al: 0.010 to 0.065%; N: 0.004 to 0.012%; Mn: 1.00% or less; S: 0.050% or less; a total of 0.01 to 0.Type: ApplicationFiled: January 16, 2020Publication date: March 31, 2022Applicant: NIPPON STEEL CORPORATIONInventors: Yoshiyuki USHIGAMI, Shuichi NAKAMURA, Hiroyasu FUJII, Norikazu FUJII
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Publication number: 20220102035Abstract: A grain-oriented electrical steel sheet according to an aspect of the present invention includes an underlying steel sheet and a tension-insulation coating arranged on the surface of the underlying steel sheet, and a ten-point average roughness RzL in an L direction obtained when the tension-insulation coating is removed from the grain-oriented electrical steel sheet with an alkaline solution, and then the surface of the underlying steel sheet is measured in a rolling direction is 6.0 ?m or less.Type: ApplicationFiled: January 16, 2020Publication date: March 31, 2022Applicant: NIPPON STEEL CORPORATIONInventors: Shuichi NAKAMURA, Yoshiyuki USHIGAMI, Hiroyasu FUJII
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Publication number: 20220090267Abstract: A grain-oriented electrical steel sheet includes a base steel sheet which contains Si and Mn, an intermediate layer which is disposed on a surface of the base steel sheet and contains a silicon oxide as a main component, and an insulation coating which is disposed on a surface of the intermediate layer. A final-annealed film is not substantially present on a surface of the base steel sheet. In a surface layer region of grain-oriented electrical steel sheet, a Mn-depletion layer having a valley portion of a Mn content in which a Mn content is lower than an average Mn content of the base steel sheet in a region deeper than the surface layer region is provided, and a Mn-rich layer having a peak portion of a Mn content in which a Mn content is higher than that in the valley portion of the Mn content is provided in a region closer to a surface of the insulation coating than the Mn-depletion layer.Type: ApplicationFiled: January 16, 2020Publication date: March 24, 2022Applicant: NIPPON STEEL CORPORATIONInventors: Shinji YAMAMOTO, Yoshiyuki USHIGAMI, Shinsuke TAKATANI, Shuichi NAKAMURA
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Publication number: 20210388459Abstract: A method for manufacturing a grain-oriented electrical steel sheet includes: a silicon steel material production process of producing a silicon steel material; a hot rolling process of obtaining a hot rolled sheet by subjecting the silicon steel material to hot rolling; a cold rolling process of obtaining a steel sheet having a final sheet thickness by subjecting the hot rolled sheet to a single cold rolling process or to multiple cold rolling processes having intermediate annealing performed between cold rolling processes; a decarburization annealing process of subjecting the steel sheet to decarburization annealing using a decarburization annealing furnace including a heating area and a soaking area; and a final annealing process of applying an annealing separator having alumina as a main component to the steel sheet and subjecting the steel sheet to final annealing, wherein, in the decarburization annealing process, when X represents the Cr content of the silicon steel material in terms of mass %, an oxidaType: ApplicationFiled: January 16, 2020Publication date: December 16, 2021Applicant: NIPPON STEEL CORPORATIONInventors: Yoshiyuki USHIGAMI, Shuichi NAKAMURA, Hiroyasu FUJII