Patents by Inventor Yuka Miyamoto
Yuka Miyamoto 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: 9528187Abstract: A steel sheet for containers that has excellent film adhesion qualities, and has a Zr compound film formed thereupon by immersion in or electrolytic treatment with a solution containing Zr ions, F ions, and hydroxylic acid, the Zr compound film being applied in an amount such that the metal Zr content is 0.1-100 mg/m2 and the F content is no more than 0.1 mg/m2.Type: GrantFiled: September 14, 2011Date of Patent: December 27, 2016Assignee: JFE STEEL CORPORATIONInventors: Takeshi Suzuki, Norihiko Nakamura, Yuka Miyamoto, Yoichi Tobiyama
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Publication number: 20160289841Abstract: A manufacturing method for steel sheets for containers produces steel sheets with excellent film adhesion qualities. This steel sheet for containers has, on a steel sheet, a chemical conversion coating with a metal Zr content of 1-100 mg/m2, a P content of 0.1-50 mg/m2, and an F content of no more than 0.1 mg/m2, upon which is formed a phenolic resin layer with a C content of 0.1-50 mg/m2. Moreover, the manufacturing method for steel sheets for containers is a method for obtaining the steel sheet for containers wherein the chemical conversion coating is formed on the steel sheet by subjecting the steel sheet to immersion in or electrolytic treatment with a treatment solution containing Zr ions, phosphoric acid ions, and F ions; and subsequently, the steel sheet upon which the chemical conversion coating has been formed is immersed in, or undergoes topical application of, an aqueous solution containing phenolic resin, then dried.Type: ApplicationFiled: June 14, 2016Publication date: October 6, 2016Inventors: Takeshi SUZUKI, Norihiko NAKAMURA, Yuka MIYAMOTO, Yoichi TOBIYAMA
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Patent number: 9435034Abstract: A manufacturing method for steel sheets for containers produces steel sheets with excellent film adhesion qualities. In a method for manufacturing steel sheets upon which is formed a chemical conversion coating having a metal Zr content of 1-100 mg/m2 and F content of no more than 0.1 mg/m2, the chemical conversion coating is formed on the steel sheet by subjecting the steel sheet to immersion in or electrolytic treatment with a treatment solution containing Zr ions and F ions, and subsequently, the steel sheet upon which the chemical conversion coating has been formed is washed with water having a temperature of at least 80° C. and dried.Type: GrantFiled: September 14, 2011Date of Patent: September 6, 2016Assignee: JFE STEEL CORPORATIONInventors: Takeshi Suzuki, Norihiko Nakamura, Yuka Miyamoto, Yoichi Tobiyama
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Patent number: 9416460Abstract: Disclosed is a steel sheet for containers that maintains excellent corrosion resistance even when a surface treatment that replaces a chromate treatment has been conducted, and that has excellent film adhesion qualities and appearance. This steel plate for containers has, on at least one surface thereof, a chemical conversion coating including at least two coatings selected from a zirconium coating that contains zirconium and has a metal zirconium content of 0.1-9 mg/m2, a phosphate coating that contains phosphoric acid and has a phosphorous content of 0.1-8 mg/m2, and a phenolic resin coating that contains phenolic resin in an amount of 0.5-8 mg/m2 in terms of carbon, the percentage of the area of the surface of the chemical conversion coating layer having particles Of a prescribed size being 0.1-50%.Type: GrantFiled: September 14, 2011Date of Patent: August 16, 2016Assignee: JFE STEEL CORPORATIONInventors: Takeshi Suzuki, Norihiko Nakamura, Yuka Miyamoto, Yoichi Tobiyama
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Publication number: 20160145710Abstract: There is provided a high-carbon hot-rolled steel sheet and method for producing the same. The steel sheet has excellent hardenability consistently, even when annealed in a nitrogen atmosphere, and excellent workability. The steel sheet has a hardness in the range of 65 or less in terms of HRB and a total elongation El of 40% or more before a quenching treatment is performed.Type: ApplicationFiled: July 8, 2014Publication date: May 26, 2016Applicant: JFE STEEL CORPORATIONInventors: Yuka MIYAMOTO, Takashi KOBAYASHI, Chikara KAMI
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Publication number: 20160145709Abstract: There is provided is a high-carbon hot-rolled steel sheet and method for producing the same. The steel sheet has excellent hardenability consistently, even when annealed in a nitrogen atmosphere, and excellent formability. The steel sheet has a hardness in the range of 83 HRB or less and a total elongation of 30% or more before being subjected to a quenching treatment.Type: ApplicationFiled: July 8, 2014Publication date: May 26, 2016Applicant: JFE STEEL CORPORATIONInventors: Yuka MIYAMOTO, Takashi KOBAYASHI, Chikara KAMI, Hayato SAITO, Kaneharu OKUDA
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Patent number: 9169577Abstract: Provided are a Cr-free surface-treated steel sheet that has excellent humid resin adhesion and corrosion resistance and that exhibits no streak-like surface defects, a method for manufacturing such a surface-treated steel sheet, and a resin-covered steel sheet using such a surface-treated steel sheet. A surface-treated steel sheet includes a steel sheet; a corrosion-resistant coating, on at least one side thereof, that is composed of at least one layer selected from a Ni layer, a Sn layer, an Fe—Ni alloy layer, an Fe—Sn alloy layer, and an Fe—Ni—Sn alloy layer; and an adherent coating, on the corrosion-resistant coating, that contains Zr and at least one species selected from P derived from a phosphoric acid and C derived from a phenolic resin in a total mass ratio to Zr of 0.01 to 10.Type: GrantFiled: September 14, 2011Date of Patent: October 27, 2015Assignee: JFE Steel CorporationInventors: Yuka Miyamoto, Takeshi Suzuki, Norihiko Nakamura, Yoichi Tobiyama
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Publication number: 20150000801Abstract: A high-carbon hot rolled steel sheet with excellent hardenability and small in-plane anisotropy, and a method for manufacturing the steel sheet are provided. The steel sheet has a chemical composition including, by mass %, C: 0.20 to 0.48%, Si: not more than 0.1%, Mn: not more than 0.5%, P: not more than 0.03%, S: not more than 0.01%, sol. Al: not more than 0.10%, N: not more than 0.005% and B: 0.0005 to 0.0050%, the balance including Fe and inevitable impurities. The steel sheet includes a microstructure containing ferrite and cementite. The cementite has an average grain size of not more than 1.0 ?m. The steel sheet has an in-plane anisotropy of r value, ?r, of not more than 0.1 in absolute value.Type: ApplicationFiled: December 25, 2012Publication date: January 1, 2015Applicant: JFE STEEL CORPORATIONInventors: Yuka Miyamoto, Takashi Kobayashi, Nobuyuki Nakamura, Yoshimasa Funakawa
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Publication number: 20130228467Abstract: Provided are an apparatus for continuous electrolytic treatment of a steel sheet that is suitable for producing a surface-treated steel sheet and a method for producing the surface-treated steel sheet using the apparatus for continuous electrolytic treatment of a steel sheet. The apparatus includes N pairs of tabular electrodes having a length L and being arranged to respectively face two surfaces of a steel sheet. Each electrode includes n sections arranged in the longitudinal direction of the electrode and disposed on the surface of the electrode facing the steel sheet surface. Each section is constituted by a conductive portion including an electrode portion having a length T1 and a nonconductive portion made by making an electrode portion having a length T2 nonconductive, where n×N?10, 0.96?T2/(T1+T2)?0.05, and 0.9?T1/L?0.1.Type: ApplicationFiled: September 14, 2011Publication date: September 5, 2013Applicant: JFE STEEL CORPORATIONInventors: Yuka Miyamoto, Takeshi Suzuki, Hisato Noro, Masao Inose, Hiroki Iwasa, Norihiko Nakamura, Yoichi Tobiyama
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Publication number: 20130224517Abstract: Provided are a Cr-free surface-treated steel sheet that has excellent humid resin adhesion and corrosion resistance and that exhibits no streak-like surface defects, a method for manufacturing such a surface-treated steel sheet, and a resin-covered steel sheet using such a surface-treated steel sheet. A surface-treated steel sheet includes a steel sheet; a corrosion-resistant coating, on at least one side thereof, that is composed of at least one layer selected from a Ni layer, a Sn layer, an Fe—Ni alloy layer, an Fe—Sn alloy layer, and an Fe—Ni—Sn alloy layer; and an adherent coating, on the corrosion-resistant coating, that contains Zr and at least one species selected from P derived from a phosphoric acid and C derived from a phenolic resin in a total mass ratio to Zr of 0.01 to 10.Type: ApplicationFiled: September 14, 2011Publication date: August 29, 2013Applicant: JFE STEEL CORPORATIONInventors: Yuka Miyamoto, Takeshi Suzuki, Norihiko Nakamura, Yoichi Tobiyama
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Publication number: 20130216858Abstract: A steel sheet for containers that has excellent film adhesion qualities, and has a Zr compound film formed thereupon by immersion in or electrolytic treatment with a solution containing Zr ions, F ions, and hydroxylic acid, the Zr compound film being applied in an amount such that the metal Zr content is 0.1-100 mg/m and the F content is no more than 0.1 mg/m2.Type: ApplicationFiled: September 14, 2011Publication date: August 22, 2013Applicant: JFE STEEL CORPORATIONInventors: Takeshi Suzuki, Norihiko Nakamura, Yuka Miyamoto, Yoichi Tobiyama
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Publication number: 20130216714Abstract: Disclosed is a manufacturing method for steel sheets for containers that enables reliable, continuous manufacture of steel sheets, with excellent film adhesion qualities, for containers. The manufacturing method for steel sheets for containers is a method in which a film containing Zr is formed on the surface of the steel sheets by immersing, and/or subjecting to electrolytic treatment, the steel sheets in a solution containing Zr ions, F ions, and at least one reaction accelerating component selected from a group including Al ions, boric acid ions, Cu ions, Ca ions, metal Al, or metal Cu.Type: ApplicationFiled: September 14, 2011Publication date: August 22, 2013Applicant: JFE STEEL CORPORATIONInventors: Takeshi Suzuki, Yuka Miyamoto, Yoichi Tobiyama, Hisato Noro, Masao Inose
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Publication number: 20130209827Abstract: A steel sheet for containers that has excellent film adhesion qualities, and has; a chemical conversion coating formed by immersing or subjecting to electrolytic treatment a steel sheet in a solution containing Zr ions, F ions, with adhesion amount of 0.1 to 100 mg/m2 for metal Zr and no more than 0.1 mg/m2 for F; and a hydroxyl acid treatment layer formed on the chemical conversion coating, the layer having a C adhesion amount of 0.05 to 50 mg/m2.Type: ApplicationFiled: September 14, 2011Publication date: August 15, 2013Applicant: JFE STEEL CORPORATIONInventors: Takeshi Suzuki, Norihiko Nakamura, Yuka Miyamoto, Yoichi Tobiyama
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Publication number: 20130209830Abstract: A manufacturing method for steel sheets for containers produces steel sheets with excellent film adhesion qualities. This steel sheet for containers has, on a steel sheet, a chemical conversion coating with a metal Zr content of 1-100 mg/m2, a P content of 0.1-50 mg/m2, and an F content of no more than 0.1 mg/m2, upon which is formed a phenolic resin layer with a C content of 0.1-50 mg/m2. Moreover, the manufacturing method for steel sheets for containers is a method for obtaining the steel sheet for containers wherein the chemical conversion coating is formed on the steel sheet by subjecting the steel sheet to immersion in or electrolytic treatment with a treatment solution containing Zr ions, phosphoric acid ions, and F ions; and subsequently, the steel sheet upon which the chemical conversion coating has been formed is immersed in, or undergoes topical application of, an aqueous solution containing phenolic resin, then dried.Type: ApplicationFiled: September 14, 2011Publication date: August 15, 2013Applicant: JFE STEEL CORPORATIONInventors: Takeshi Suzuki, Norihiko Nakamura, Yuka Miyamoto, Yoichi Tobiyama
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Publication number: 20130209829Abstract: Disclosed is a steel sheet for containers that maintains excellent corrosion resistance even when a surface treatment that replaces a chromate treatment has been conducted, and that has excellent film adhesion qualities and appearance. This steel plate for containers has, on at least one surface thereof, a chemical conversion coating including at least two coatings selected from a zirconium coating that contains zirconium and has a metal zirconium content of 0.1-9 mg/m2, a phosphate coating that contains phosphoric acid and has a phosphorous content of 0.1-8 mg/m2, and a phenolic resin coating that contains phenolic resin in an amount of 0.5-8 mg/m2 in terms of carbon, the percentage of the area of the surface of the chemical conversion coating layer having particles Of a prescribed size being 0.1-50%.Type: ApplicationFiled: September 14, 2011Publication date: August 15, 2013Applicant: JFE STEEL CORPORATIONInventors: Takeshi Suzuki, Norihiko Nakamura, Yuka Miyamoto, Yoichi Tobiyama
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Publication number: 20130206285Abstract: A manufacturing method for steel sheets for containers produces steel sheets with excellent film adhesion qualities. In a method for manufacturing steel sheets upon which is formed a chemical conversion coating having a metal Zr content of 1-100 mg/m2 and F content of no more than 0.1 mg/m2, the chemical conversion coating is formed on the steel sheet by subjecting the steel sheet to immersion in or electrolytic treatment with a treatment solution containing Zr ions and F ions, and subsequently, the steel sheet upon which the chemical conversion coating has been formed is washed with water having a temperature of at least 80° C. and dried.Type: ApplicationFiled: September 14, 2011Publication date: August 15, 2013Applicant: JFE STEEL CORPORATIONInventors: Takeshi Suzuki, Norihiko Nakamura, Yuka Miyamoto, Yoichi Tobiyama
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Publication number: 20130130055Abstract: A coated steel sheet includes a corrosion-resistant coating composed of at least one layer selected from the group consisting of a Ni layer, a Sn layer, an Fe—Ni alloy layer, an Fe—Sn alloy layer, and an Fe—Ni—Sn alloy layer disposed on at least one surface of a steel sheet, and an adhesive coating disposed on the corrosion-resistant coating, the adhesive coating containing Zr and further containing at least one metal element selected from the group consisting of Co, Fe, Ni, V, Cu, Mn, and Zn, in total, at a ratio by mass of 0.01 to 10 with respect to Zr. The coated steel sheet has excellent humid resin adhesion and corrosion resistance, in which streaky surface defects do not occur.Type: ApplicationFiled: March 24, 2011Publication date: May 23, 2013Applicant: JFE STEEL CORPORATIONInventors: Yuka Miyamoto, Takeshi Suzuki, Hiroki Iwasa, Norihiko Nakamura, Masao Inose, Hisato Noro, Yoichi Tobiyama
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Patent number: 7250244Abstract: An image forming apparatus contains a photoconductor having a support and a photoconductive layer disposed thereon. I(S) at the surface of the photoconductor and I(S) at the interface of the photoconductive layer on the support side are 5.0×10?3 or less and the sum of I(S)s is 3.0×10?3 or more. I(S)s are determined according to following Equations 2 and 3 after subjecting a group of data of N samples of height x(t) [?m] of a profile curve at the surface or of one at the interface to discrete Fourier transform according to following Equation 1, the N samples being taken at intervals of ?t [?m] in a reference line direction. X ? ( n N · ? ? ? t ) = ? m = 0 N - 1 ? ? x ? ( m · ? ? ? t ) ? exp ? ( - ?2? · n N · ? ? ? t · m · ? ? ? t ) Equation ? ? 1 wherein n and m are each an integer; N is 2?, where ? is an integer.Type: GrantFiled: November 14, 2005Date of Patent: July 31, 2007Assignee: Ricoh Company, Ltd.Inventors: Yuka Miyamoto, Toshiyuki Kabata
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Publication number: 20060063079Abstract: An image forming apparatus contains a photoconductor having a support and a photoconductive layer disposed thereon. I(S) at the surface of the photoconductor and I(S) at the interface of the photoconductive layer on the support side are 5.0×10?3 or less and the sum of I(S)s is 3.0×10?3 or more. I(S)s are determined according to following Equations 2 and 3 after subjecting a group of data of N samples of height x(t) [?m] of a profile curve at the surface or of one at the interface to discrete Fourier transform according to following Equation 1, the N samples being taken at intervals of ?t [?m] in a reference line direction. X ? ( n N · ? ? ? ? t ) = ? m = 0 N - 1 ? ? ? x ? ( m · ? ? ? ? t ) ? exp ? ( - ?2? · n N · ? ? ? ? t · m · ? ? ? ? t ) Equation ? ? ? 1 wherein n and m are each an integer; N is 2?, where ? is an integer.Type: ApplicationFiled: November 14, 2005Publication date: March 23, 2006Inventors: Yuka Miyamoto, Toshiyuki Kabata
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Patent number: 7014967Abstract: An image forming apparatus contains a photoconductor having a support and a photoconductive layer disposed thereon. I(S) at the surface of the photoconductor and I(S) at the interface of the photoconductive layer on the support side are 5.0×10?3 or less and the sum of I(S)s is 3.0×10?3 or more.Type: GrantFiled: August 18, 2003Date of Patent: March 21, 2006Assignee: Ricoh Company, Ltd.Inventors: Yuka Miyamoto, Toshiyuki Kabata