Patents by Inventor Hajime Itagaki
Hajime Itagaki 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: 11952651Abstract: An Fe-based amorphous alloy ribbon reduced in iron loss, less deformed, and highly productive in a condition of a magnetic flux density of 1.45 T is provided. One aspect of the present disclosure provides an Fe-based amorphous alloy ribbon having first and second surfaces, and is provided with continuous linear laser irradiation marks on at least the first surface. Each linear laser irradiation mark is formed along a direction orthogonal to a casting direction of the Fe-based amorphous alloy ribbon, and has unevenness on its surface. When the unevenness is evaluated in the casting direction, a height difference HL×width WA calculated from the height difference between a highest point and a lowest point in a thickness direction of the Fe-based amorphous alloy ribbon and the width WA which is a length of the linear irradiation mark on the first surface is 6.0 to 180 ?m2.Type: GrantFiled: June 24, 2020Date of Patent: April 9, 2024Assignee: PROTERIAL, LTD.Inventors: Hajime Itagaki, Morifumi Kuroki, Makoto Sasaki, Shin Nakajima
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Patent number: 11802328Abstract: An Fe-based amorphous alloy ribbon reduced in an iron loss in a condition of a magnetic flux density of 1.45 T is provided. One aspect of the present disclosure provides an Fe-based amorphous alloy ribbon. The Fe-based amorphous alloy ribbon has continuous linear laser irradiation marks on at least one surface. The linear laser irradiation marks are formed along a direction orthogonal to a casting direction of the Fe-based amorphous alloy ribbon. Each linear laser irradiation mark has unevenness on its surface. When the unevenness is evaluated in the casting direction, a difference HL between a highest point and a lowest point in the thickness direction of the Fe-based amorphous alloy ribbon is 0.25 ?m to 2.0 ?m.Type: GrantFiled: June 24, 2020Date of Patent: October 31, 2023Assignee: PROTERIAL, LTD.Inventors: Hajime Itagaki, Morifumi Kuroki, Makoto Sasaki, Shin Nakajima
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Method of producing laminated amorphous alloy ribbon holding spool and method of producing iron core
Patent number: 11728076Abstract: A method of producing a laminated amorphous alloy ribbon holding spool. The method includes providing amorphous alloy ribbon holding spools, each of which is wound with a single layer amorphous alloy ribbon, unwinding the single layer amorphous alloy ribbon from each of the amorphous alloy ribbon holding spools, making the single layer amorphous alloy ribbon travel with a laser being radiated thereto, to thereby simultaneously prepare single layer amorphous alloy ribbons having laser irradiation mark formed thereon, laminating the single layer amorphous alloy ribbons having the laser irradiation mark formed thereon to, thereby prepare a laminated amorphous alloy ribbon, and winding up the laminated amorphous alloy ribbon on a spool.Type: GrantFiled: November 18, 2021Date of Patent: August 15, 2023Assignee: Proterial, Ltd.Inventors: Hajime Itagaki, Atsuhiro Noguchi, Morifumi Kuroki, Makoto Sasaki -
Patent number: 11613799Abstract: One embodiment of the present invention provides an Fe-based amorphous alloy ribbon for an Fe-based nanocrystalline alloy, the Fe-based amorphous alloy ribbon being a cooled body of a molten metal that has been applied to a surface of a chill roll, wherein the Fe-based amorphous alloy ribbon includes a recess having a depth of 1 ?m or more in a 0.647 mm×0.647 mm region located in a central part, in the ribbon width direction, of a ribbon surface, which is a cooled surface, in which a maximum area of the recess having a depth of 1 ?m or more is 3000 ?m2 or less; and a method of manufacturing the same.Type: GrantFiled: March 28, 2018Date of Patent: March 28, 2023Assignee: HITACHI METALS, LTD.Inventors: Hajime Itagaki, Motoki Ohta
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Patent number: 11521782Abstract: A transformer includes an iron core formed by using an Fe-based amorphous alloy ribbon and a winding wound around the iron core. The ribbon includes dotted line laser radiation traces arranged on at least a first surface in a casting direction. Each of the dotted line laser radiation traces is formed by arranging laser radiation marks on the first surface along a width direction. A spot space is from 0.10 mm to 0.50 mm. In a case in which a line space is d1 (mm), and the spot space is d2 (mm), a number density D of the laser radiation marks (D=(1/d1)×(1/d2)) is from 0.05 marks/mm2 to 0.50 marks/mm2. An iron loss of the ribbon in a single sheet is 0.150 W/kg or less at a frequency of 60 Hz and a magnetic flux density of 1.45 T.Type: GrantFiled: September 29, 2020Date of Patent: December 6, 2022Assignee: Hitachi Metals, Ltd.Inventors: Shin Nakajima, Hajime Itagaki
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Publication number: 20220375666Abstract: An Fe-based amorphous alloy ribbon reduced in an iron loss in a condition of a magnetic flux density of 1.45 T is provided. One aspect of the present disclosure provides an Fe-based amorphous alloy ribbon. The Fe-based amorphous alloy ribbon has continuous linear laser irradiation marks on at least one surface. The linear laser irradiation marks are formed along a direction orthogonal to a casting direction of the Fe-based amorphous alloy ribbon. Each linear laser irradiation mark has unevenness on its surface. When the unevenness is evaluated in the casting direction, a difference HL between a highest point and a lowest point in the thickness direction of the Fe-based amorphous alloy ribbon is 0.25 ?m to 2.0 ?m.Type: ApplicationFiled: June 24, 2020Publication date: November 24, 2022Inventors: Hajime ITAGAKI, Morifumi KUROKI, Makoto SASAKI, Shin NAKAJIMA
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Publication number: 20220364212Abstract: An Fe-based amorphous alloy ribbon reduced in iron loss, less deformed, and highly productive in a condition of a magnetic flux density of 1.45 T is provided. One aspect of the present disclosure provides an Fe-based amorphous alloy ribbon having first and second surfaces, and is provided with continuous linear laser irradiation marks on at least the first surface. Each linear laser irradiation mark is formed along a direction orthogonal to a casting direction of the Fe-based amorphous alloy ribbon, and has unevenness on its surface. When the unevenness is evaluated in the casting direction, a height difference HL×width WA calculated from the height difference HL between a highest point and a lowest point in a thickness direction of the Fe-based amorphous alloy ribbon and the width WA which is a length of the linear irradiation mark on the first surface is 6.0 to 180 ?m2.Type: ApplicationFiled: June 24, 2020Publication date: November 17, 2022Inventors: Hajime ITAGAKI, Morifumi KUROKI, Makoto SASAKI, Shin NAKAJIMA
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METHOD OF PRODUCING LAMINATED AMORPHOUS ALLOY RIBBON HOLDING SPOOL AND METHOD OF PRODUCING IRON CORE
Publication number: 20220172868Abstract: A method of producing a laminated amorphous alloy ribbon holding spool. The method includes providing amorphous alloy ribbon holding spools, each of which is wound with a single layer amorphous alloy ribbon, unwinding the single layer amorphous alloy ribbon from each of the amorphous alloy ribbon holding spools, making the single layer amorphous alloy ribbon travel with a laser being radiated thereto, to thereby simultaneously prepare single layer amorphous alloy ribbons having laser irradiation mark formed thereon, laminating the single layer amorphous alloy ribbons having the laser irradiation mark formed thereon to, thereby prepare a laminated amorphous alloy ribbon, and winding up the laminated amorphous alloy ribbon on a spool.Type: ApplicationFiled: November 18, 2021Publication date: June 2, 2022Inventors: Hajime Itagaki, Atsuhiro Noguchi, Morifumi Kuroki, Makoto Sasaki -
Publication number: 20220168846Abstract: A method of producing an amorphous alloy ribbon. The method includes radiating a laser to an amorphous alloy ribbon, while the amorphous alloy ribbon travels or is travelling, to thereby form laser irradiation marks on the amorphous alloy ribbon. Further, when the amorphous alloy ribbon has a traveling speed of S1 m/sec and the laser has a scanning speed of S2 m/sec, the S1 is 0.1 m/sec or more and 30 m/sec or less, the S2 is 1 m/sec or more and 800 m/sec or less, and S2/S1 is 3.0 or more.Type: ApplicationFiled: November 18, 2021Publication date: June 2, 2022Inventors: Hajime Itagaki, Atsuhiro Noguchi, Morifumi Kuroki, Makoto Sasaki
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Publication number: 20210098175Abstract: A transformer includes an iron core formed by using an Fe-based amorphous alloy ribbon and a winding wound around the iron core. The ribbon includes dotted line laser radiation traces arranged on at least a first surface in a casting direction. Each of the dotted line laser radiation traces is formed by arranging laser radiation marks on the first surface along a width direction. A spot space is from 0.10 mm to 0.50 mm. In a case in which a line space is d1 (mm), and the spot space is d2 (mm), a number density D of the laser radiation marks (D=(1/d1)×(1/d2)) is from 0.05 marks/mm2 to 0.50 marks/mm2. An iron loss of the ribbon in a single sheet is 0.150 W/kg or less at a frequency of 60 Hz and a magnetic flux density of 1.45 T.Type: ApplicationFiled: September 29, 2020Publication date: April 1, 2021Inventors: Shin NAKAJIMA, Hajime ITAGAKI
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Publication number: 20210057133Abstract: One aspect of the invention provides an Fe-based amorphous alloy ribbon having a free solidified surface and a roll contact surface, in which the Fe-based amorphous alloy ribbon has plural laser irradiation mark rows each formed from plural laser irradiation marks on at least one surface of the free solidified surface or the roll contact surface, a line interval is from 10 mm to 60 mm, which is a centerline interval in a middle section in a width direction, between mutually adjacent laser irradiation mark rows, a spot interval is from 0.10 mm to 0.50 mm, which is an interval between center points of the plural laser irradiation marks in each of the plural laser irradiation mark rows, and the number density D (=(1/d1)×(1/d2), d1: line interval, d2: spot interval) of the laser irradiation marks is from 0.05 marks/mm2 to 0.50 marks/mm2.Type: ApplicationFiled: March 29, 2019Publication date: February 25, 2021Applicant: HITACHI METALS, LTD.Inventors: Hajime ITAGAKI, Motoki OHTA, Morifumi KUROKI, Makoto SASAKI
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Publication number: 20200377981Abstract: One embodiment of the present invention provides an Fe-based amorphous alloy ribbon for an Fe-based nanocrystalline alloy, the Fe-based amorphous alloy ribbon being a cooled body of a molten metal that has been applied to a surface of a chill roll, wherein the Fe-based amorphous alloy ribbon includes a recess having a depth of 1 ?m or more in a 0.647 mm×0.647 mm region located in a central part, in the ribbon width direction, of a ribbon surface, which is a cooled surface, in which a maximum area of the recess having a depth of 1 ?m or more is 3000 ?m2 or less; and a method of manufacturing the same.Type: ApplicationFiled: March 28, 2018Publication date: December 3, 2020Applicant: HITACHI METALS, LTD.Inventors: Hajime ITAGAKI, Motoki OHTA
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Patent number: 10661334Abstract: The invention provides a method of producing an amorphous alloy ribbon, the method including a step of producing an amorphous alloy ribbon by discharging a molten alloy through a rectangular opening of a molten metal nozzle having a molten metal flow channel along which the molten alloy flows, the opening being an end of the molten metal flow channel, onto a surface of a rotating chill roll, in which, among wall surfaces of the molten metal flow channel, a maximum height Rz(t) of a surface t, which is a wall surface parallel to a flow direction of the molten alloy and to a short side direction of the opening, is 10.5 ?m or less.Type: GrantFiled: October 26, 2016Date of Patent: May 26, 2020Assignee: HITACHI METALS, LTD.Inventors: Hiroshi Shibasaki, Takayuki Motegi, Hajime Itagaki, Jun Sunakawa, Yoshio Bizen
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Patent number: 10450638Abstract: The present invention achieves an object of continuously supplying a melt from a melt nozzle over a long period of time by adjusting the contents of Mn and S in an Fe—B—Si—C-type amorphous alloy ribbon. An amorphous alloy ribbon of the present invention includes a composition containing Fe, Si, B, C, Mn, S, and inevitable impurities, the composition containing, with respect to 100.0 atm % of the total amount of Fe, Si, B, and C, 3.0 atm % or more and 10.0 atm % or less of Si, 10.0 atm % or more and 15.0 atm % or less of B, and 0.2 atm % or more and 0.4 atm % or less of C, the amorphous alloy ribbon having a content ratio of Mn of more than 0.12 mass % and less than 0.15 mass %, and a content ratio of S of 0.0036 mass % or more and less than 0.0045 mass %, the amorphous alloy ribbon having a thickness of 10 ?m or more and 40 ?m or less, and a width of 100 mm or more and 300 mm or less.Type: GrantFiled: November 20, 2015Date of Patent: October 22, 2019Assignee: HITACHI METALS, LTD.Inventors: Morifumi Kuroki, Kenichiro Hara, Hajime Itagaki
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Publication number: 20180334737Abstract: The present invention achieves an object of continuously supplying a melt from a melt nozzle over a long period of time by adjusting the contents of Mn and S in an Fe—B—Si—C-type amorphous alloy ribbon. An amorphous alloy ribbon of the present invention includes a composition containing Fe, Si, B, C, Mn, S, and inevitable impurities, the composition containing, with respect to 100.0 atm % of the total amount of Fe, Si, B, and C, 3.0 atm % or more and 10.0 atm % or less of Si, 10.0 atm % or more and 15.0 atm % or less of B, and 0.2 atm % or more and 0.4 atm % or less of C, the amorphous alloy ribbon having a content ratio of Mn of more than 0.12 mass % and less than 0.15 mass %, and a content ratio of S of 0.0036 mass % or more and less than 0.0045 mass %, the amorphous alloy ribbon having a thickness of 10 ?m or more and 40 ?m or less, and a width of 100 mm or more and 300 mm or less.Type: ApplicationFiled: November 20, 2015Publication date: November 22, 2018Inventors: Morifumi KUROKI, Kenichiro HARA, Hajime ITAGAKI
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Patent number: 9604278Abstract: The invention provides a method of producing an amorphous alloy ribbon, the method including a step of producing an amorphous alloy ribbon by discharging a molten alloy through a rectangular opening of a molten metal nozzle having a molten metal flow channel along which the molten alloy flows, the opening being an end of the molten metal flow channel, onto a surface of a rotating chill roll, in which, among wall surfaces of the molten metal flow channel, a maximum height Rz(t) of a surface t, which is a wall surface parallel to a flow direction of the molten alloy and to a short side direction of the opening, is 10.5 ?m or less.Type: GrantFiled: March 7, 2013Date of Patent: March 28, 2017Assignee: HITACHI METALS, LTD.Inventors: Hiroshi Shibasaki, Takayuki Motegi, Hajime Itagaki, Jun Sunakawa, Yoshio Bizen
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Publication number: 20170044648Abstract: The invention provides a method of producing an amorphous alloy ribbon, the method including a step of producing an amorphous alloy ribbon by discharging a molten alloy through a rectangular opening of a molten metal nozzle having a molten metal flow channel along which the molten alloy flows, the opening being an end of the molten metal flow channel, onto a surface of a rotating chill roll, in which, among wall surfaces of the molten metal flow channel, a maximum height Rz(t) of a surface t, which is a wall surface parallel to a flow direction of the molten alloy and to a short side direction of the opening, is 10.5 ?m or less.Type: ApplicationFiled: October 26, 2016Publication date: February 16, 2017Applicant: HITACHI METALS, LTD.Inventors: Hiroshi SHIBASAKI, Takayuki MOTEGI, Hajime ITAGAKI, Jun SUNAKAWA, Yoshio BIZEN
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Publication number: 20150050510Abstract: The invention provides an amorphous alloy ribbon consisting of Fe, Si, B, C, and unavoidable impurities, in which a content of Si is from 8.5 atom % to 9.5 atom %, and a content of B is from 10.0 atom % to less than 12.0 atom % when a total content of Fe, Si, and B is 100.0 atom %, a content of C relative to the total content of 100.0 atom % is from 0.2 atom % to 0.6 atom %, and the ribbon has a thickness of from 10 ?m to 40 ?m and a width of from 100 mm to 300 mm.Type: ApplicationFiled: March 7, 2013Publication date: February 19, 2015Applicant: HITACHI METALS, LTD.Inventors: Takayuki Motegi, Daichi Azuma, Hajime Itagaki, Yoshio Bizen
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Publication number: 20150027592Abstract: The invention provides a method of producing an amorphous alloy ribbon, the method including a step of producing an amorphous alloy ribbon by discharging a molten alloy through a rectangular opening of a molten metal nozzle having a molten metal flow channel along which the molten alloy flows, the opening being an end of the molten metal flow channel, onto a surface of a rotating chill roll, in which, among wall surfaces of the molten metal flow channel, a maximum height Rz(t) of a surface t, which is a wall surface parallel to a flow direction of the molten alloy and to a short side direction of the opening, is 10.5 ?m or less.Type: ApplicationFiled: March 7, 2013Publication date: January 29, 2015Applicant: HITACHI METALS, LTD.Inventors: Hiroshi Shibasaki, Takayuki Motegi, Hajime Itagaki, Jun Sunakawa, Yoshio Bizen
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Publication number: 20030163345Abstract: By receiving a plurality of pieces of program information from program providers looking for sponsors, broadcasting the plurality of pieces of program information as an auction program simultaneously (by thumbnail display or frame-by-frame forwarding), making viewers notify an auction program provider of programs they find interesting and notifying the sponsors of the audience rating of each program in real time, an auction program provider device, a sponsor selection method and a sponsor selection program can be provided such that each sponsor can become the sponsor of a program in which the target customers of the sponsor match the viewers of the program.Type: ApplicationFiled: July 26, 2002Publication date: August 28, 2003Applicant: FUJITSU LIMITEDInventors: Hajime Itagaki, Hiroki Monzaki, Yoichi Yokota