Patents by Inventor Masahiro Tomamoto
Masahiro Tomamoto 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: 10781036Abstract: A glass roll includes a glass film formed by a downdraw method. The glass film is wound into a roll using a winding roller in a state in which front and back glass surfaces of the glass film formed in the forming operation are exposed, and during the winding operation, the glass film is superposed on a separable protective sheet. The protective sheet extends beyond both sides in a width direction of the glass film. The protective sheet can further be wound on an outer peripheral surface of the glass film by winding only the protective sheet from a trailing end of the glass film in a winding direction of the glass film.Type: GrantFiled: July 10, 2014Date of Patent: September 22, 2020Assignee: NIPPON ELECTRIC GLASS CO., LTD.Inventors: Masahiro Tomamoto, Michiharu Eta, Hidetaka Oda, Tatsuya Takaya, Yasuo Yamazaki, Hiroshi Takimoto, Shinichi Ishibashi, Keiji Takagi, Daisuke Nagata, Takahide Nakamura, Toru Sakurabayashi, Katsutoshi Fujiwara, Mitsuharu Noda, Yasuhiko Ogiso, Takahide Fujii
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Publication number: 20200140314Abstract: A method for manufacturing an alkali-free glass substrate capable of manufacturing an alkali-free glass substrate having a higher strain point by decreasing the ?-OH value of the glass is provided. The method for manufacturing an alkali-free glass substrate is a method for continuously manufacturing a SiO2—Al2O3—RO (RO is one or more of MgO, CaO, BaO, SrO, and ZnO) based alkali-free glass substrate, which includes a step of preparing a raw material batch containing a tin compound and substantially not containing an arsenic compound or an antimony compound, a step of electric melting the prepared raw material batch in a melting furnace capable of conducting electric heating by a molybdenum electrode, and a step of forming the molten glass into a plate shape by a downdraw method.Type: ApplicationFiled: December 7, 2017Publication date: May 7, 2020Applicant: NIPPON ELECTRIC GLASS CO., LTD.Inventors: Masahiro TOMAMOTO, Hitoshi KANAYA, Toru HASEGAWA, Toru SAKURABAYASHI
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Patent number: 9931816Abstract: A glass roll reliably prevents a glass film from breaking from an end surface of the glass film as an origin of breakage. The glass roll is formed by winding the glass film into a roll while superposing the glass film on a protective sheet. The glass film is formed by an overflow downdraw method to have a thickness of 1 ?m or more and 200 ?m or less, and has each end surface in a width direction formed as a cut surface cut by laser splitting.Type: GrantFiled: September 30, 2009Date of Patent: April 3, 2018Assignee: NIPPON ELECTRIC GLASS CO., LTD.Inventors: Masahiro Tomamoto, Michiharu Eta, Hidetaka Oda, Tatsuya Takaya, Yasuo Yamazaki, Hiroshi Takimoto, Shinichi Ishibashi, Keiji Takagi, Daisuke Nagata, Takahide Nakamura, Toru Sakurabayashi, Katsutoshi Fujiwara, Mitsuharu Noda, Yasuhiko Ogiso, Takahide Fujii
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Publication number: 20170072675Abstract: A method of producing a glass film includes forming an inorganic thin film on a surface of a supporting glass so that a surface of the inorganic thin film after being formed has a surface roughness Ra of 2.0 nm or less after film formation, and forming a glass film laminate by laminating a glass film having a surface roughness Ra of 2.0 nm or less on the surface of the inorganic thin film in a state of being in contact with each other. The method also includes carrying out treatment involving heating with respect to the glass film laminate, and peeling off the glass film from the supporting glass after the treatment involving heating.Type: ApplicationFiled: November 29, 2016Publication date: March 16, 2017Applicant: Nippon Electric Glass Co., Ltd.Inventors: Masahiro TOMAMOTO, Tatsuya TAKAYA, Hiroshi TAKIMOTO, Nagatoshi ORIGUCHI
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Patent number: 9156230Abstract: A glass film laminate includes a supporting glass and a glass film peelably laminated to the supporting glass. A contacting surface of the glass film and a contacting surface of the supporting glass directly contact each other without an adhesive therebetween. The contacting surface of the supporting glass includes a first region and a second region with a surface roughness smaller than a surface roughness of the first region. An adhesive force between the supporting glass and the glass film is greater at the second region than at the first region.Type: GrantFiled: January 11, 2011Date of Patent: October 13, 2015Assignee: NIPPON ELECTRIC GLASS CO., LTD.Inventors: Masahiro Tomamoto, Takahide Fujii, Hiroshi Takimoto
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Patent number: 9061933Abstract: Provided is a method of producing a tempered glass sheet, comprising applying tempering treatment to a glass sheet by increasing the content of SiO2 in terms of mass in a surface region of a glass sheet through application of thermal treatment to the glass sheet to 1.03 or more times that in an interior region positioned at a depth of 1 ?m from a surface of the glass sheet.Type: GrantFiled: August 21, 2012Date of Patent: June 23, 2015Assignee: NIPPON ELECTRIC GLASS CO., LTD.Inventors: Hiroshi Komori, Masahiro Tomamoto, Yoshinari Kato
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Publication number: 20140319001Abstract: A glass roll includes a glass film formed by a downdraw method. The glass film is wound into a roll using a winding roller in a state in which front and back glass surfaces of the glass film formed in the forming operation are exposed, and during the winding operation, the glass film is superposed on a separable protective sheet. The protective sheet extends beyond both sides in a width direction of the glass film. The protective sheet can further be wound on an outer peripheral surface of the glass film by winding only the protective sheet from a trailing end of the glass film in a winding direction of the glass film.Type: ApplicationFiled: July 10, 2014Publication date: October 30, 2014Inventors: Masahiro TOMAMOTO, Michiharu ETA, Hidetaka ODA, Tatsuya TAKAYA, Yasuo YAMAZAKI, Hiroshi TAKIMOTO, Shinichi ISHIBASHI, Keiji TAKAGI, Daisuke NAGATA, Takahide NAKAMURA, Toru SAKURABAYASHI, Katsutoshi FUJIWARA, Mitsuharu NODA, Yasuhiko OGISO, Takahide FUJII
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Patent number: 8806894Abstract: A manufacturing method for a glass roll includes forming a glass film by a downdraw method, winding the glass film into a roll using a winding roller in a state in which front and back glass surfaces of the glass film formed in said forming operation are exposed, and during said winding operation, superposing the glass film on a separable protective sheet. The protective sheet extends beyond both sides in a width direction of the glass film. The method may further include winding the protective sheet on an outer peripheral surface of the glass film by winding only the protective sheet from a trailing end of the glass film in a winding direction of the glass film.Type: GrantFiled: September 30, 2009Date of Patent: August 19, 2014Assignee: Nippon Electric Glass Co., Ltd.Inventors: Masahiro Tomamoto, Michiharu Eta, Hidetaka Oda, Tatsuya Takaya, Yasuo Yamazaki, Hiroshi Takimoto, Shinichi Ishibashi, Keiji Takagi, Daisuke Nagata, Takahide Nakamura, Toru Sakurabayashi, Katsutoshi Fujiwara, Mitsuharu Noda, Yasuhiko Ogiso, Takahide Fujii
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Publication number: 20140166186Abstract: A glass film laminate includes a glass film and a supporting glass. The glass film and the supporting glass have surfaces in contact with each other, and each of the surfaces has a surface roughness Ra of 2.0 nm or less.Type: ApplicationFiled: February 20, 2014Publication date: June 19, 2014Applicant: Nippon Electric Glass Co., Ltd.Inventors: Tatsuya TAKAYA, Masahiro TOMAMOTO, Hiroshi TAKIMOTO, Hirokazu OKAMOTO
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Patent number: 8697241Abstract: A glass film laminate includes a glass film and a supporting glass. The glass film and the supporting glass have surfaces in contact with each other, and each of the surfaces has a surface roughness Ra of 2.0 nm or less.Type: GrantFiled: June 30, 2010Date of Patent: April 15, 2014Assignee: Nippon Electric Glass Co., Ltd.Inventors: Tatsuya Takaya, Masahiro Tomamoto, Hiroshi Takimoto, Hirokazu Okamoto
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Patent number: 8497006Abstract: Provided is a glass roll utilizing a flanged roll core, and reliably inhibiting a glass film from breaking from an end portion in a width direction thereof as an origin of breakage. A glass roll (1) is formed by winding a glass film (4) and a cushion sheet (5), under a state of being superposed, around a roll core (3) including a flange (2) at each end portion thereof, in which an end portion in a width direction of the glass film (4) is separated from the flange (2) on each side in the width direction of the glass film (4), and the cushion sheet (5) is extended beyond the end portion in the width direction of the glass film (4) to the flange (2) side, to thereby form an extension portion (5a).Type: GrantFiled: September 30, 2009Date of Patent: July 30, 2013Assignee: Nippon Electric Glass Co., Ltd.Inventors: Masahiro Tomamoto, Michiharu Eta, Hidetaka Oda, Tatsuya Takaya, Yasuo Yamazaki, Hiroshi Takimoto, Shinichi Ishibashi, Keiji Takagi, Daisuke Nagata, Takahide Nakamura, Toru Sakurabayashi, Katsutoshi Fujiwara, Mitsuharu Noda, Yasuhiko Ogiso, Takahide Fujii
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Patent number: 8413466Abstract: A glass for a display substrate composed of 50 to 70% SiO2, 10 to 25% Al2O3, 8.4 to 20% B2O3, 0 to 10% MgO, 6 to 15% CaO, 0 to 10% BaO, 0 to 10% SrO, 0 to 10% ZnO, 0 to 5% TiO2, 0 to 5% P2O5, 0.01 to 0.2% alkali metal, and from 0.01% to less than 0.4% ZrO2, as expressed in % by mass. The glass can have a ?-OH value of 0.20/mm or more and an area of 0.1 m2 or more. The glass is produced by mixing raw materials to provide the SiO2, Al2O3, B2O3, MgO, CaO, BaO, SrO, ZnO, TiO2, P2O5 and alkali metal contents, electrically melting the raw materials in a melting furnace constructed of a high zirconia refractory; and refining, homogenizing and forming the glass melt.Type: GrantFiled: March 19, 2012Date of Patent: April 9, 2013Assignee: Nippon Electric Glass Co., Ltd.Inventors: Tatsuya Takaya, Masahiro Tomamoto
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Publication number: 20130071666Abstract: Provided is a method of producing a tempered glass sheet, comprising applying tempering treatment to a glass sheet by increasing the content of SiO2 in terms of mass in a surface region of a glass sheet through application of thermal treatment to the glass sheet to 1.03 or more times that in an interior region positioned at a depth of 1 ?m from a surface of the glass sheet.Type: ApplicationFiled: August 21, 2012Publication date: March 21, 2013Inventors: Hiroshi KOMORI, Masahiro Tomamoto, Yoshinari Kato
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Patent number: 8241751Abstract: Provided is a glass roll formed by winding a glass film into a roll, in which a minimum winding radius of the glass film is optimized. Thus, the glass film is reliably prevented from breaking due to static fatigue, and is able to be stored for long periods. A glass roll (1), which is formed by winding a glass film (2) into a roll, has a configuration in which the glass film has a minimum winding radius (R) satisfying the following relation: R?(T/2)[(2.3/?)×E?1], where ? represents flexural strength of the glass film (2) obtained by a 3-point bending test, T represents a thickness of the glass film, and E represents a Young's modulus of the glass film.Type: GrantFiled: September 30, 2009Date of Patent: August 14, 2012Assignee: Nippon Electric Glass Co., Ltd.Inventors: Masahiro Tomamoto, Michiharu Eta, Hidetaka Oda, Tatsuya Takaya, Yasuo Yamazaki, Hiroshi Takimoto, Shinichi Ishibashi, Keiji Takagi, Daisuke Nagata, Takahide Nakamura, Toru Sakurabayashi, Katsutoshi Fujiwara, Mitsuharu Noda, Yasuhiko Ogiso, Takahide Fujii
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Publication number: 20120178612Abstract: A glass for a display substrate composed of 50 to 70% SiO2, 10 to 25% Al2O3, 8.4 to 20% B2O3, 0 to 10% MgO, 6 to 15% CaO, 0 to 10% BaO, 0 to 10% SrO, 0 to 10% ZnO, 0 to 5% TiO2, 0 to 5% P2O5, 0.01 to 0.2% alkali metal, and from 0.01% to less than 0.4% ZrO2, as expressed in % by mass. The glass can have a ?-OH value of 0.20/mm or more and an area of 0.1 m2 or more. The glass is produced by mixing raw materials to provide the SiO2, Al2O3, B2O3, MgO, CaO, BaO, SrO, ZnO, TiO2, P2O5 and alkali metal contents, electrically melting the raw materials in a melting furnace constructed of a high zirconia refractory; and refining, homogenizing and forming the glass melt.Type: ApplicationFiled: March 19, 2012Publication date: July 12, 2012Inventors: Tatsuya Takaya, Masahiro Tomamoto
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Publication number: 20120080403Abstract: A glass film laminate comprises a glass film (2) and a supporting glass (3) laminated to each other. At least one of the contacting surface of the glass film (2) and the contacting surface of the supporting glass (3) comprises a region with a relatively large surface roughness and a region with a relatively small surface roughness.Type: ApplicationFiled: January 11, 2011Publication date: April 5, 2012Inventors: Masahiro Tomamoto, Takahide Fujii, Hiroshi Takimoto
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Patent number: 8087263Abstract: A method of producing a glass having a SiO2—Al2O3—B2O3—RO based composition, where RO is at least one of MgO, CaO, BaO, SrO and ZnO, a melting temperature corresponding to 102.5 poise of 1570° C. or higher and an alkali content of 0.01 to 0.2% and a ZrO2 content of 0.01 to 0.3%, as expressed in % by mass. And, a method of producing a glass having a SiO2—Al2O3—B2O3- RO based composition, where RO is at least one of MgO, CaO, BaO, SrO and ZnO, a density of 2.5 g/cm3 or less, an average thermal expansion coefficient of 25 to 36×10?7/° C. in a temperature range of 30 to 380° C., a strain point of 640° C. or higher and an alkali content of 0.01 to 0.2% and a ZrO2 content of not less than 0.01% and less than 0.4%, as expressed in % by mass.Type: GrantFiled: July 22, 2010Date of Patent: January 3, 2012Assignee: Nippon Electric Glass Co., Ltd.Inventors: Tatsuya Takaya, Masahiro Tomamoto
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Patent number: 8056367Abstract: A situation where glass chip produced as a result of breakage of waste glass sheets floats in a cutting chamber when the waste glass sheets produced in glass sheet producing steps are collected is suppressed. Provided is a glass sheet production installation (1), in which a sheetshaped glass ribbon (B) is formed by supplying molten glass (A) into a forming body (2) and causing the molten glass (A) to flow downward on a conveyance path extending in an upper and lower direction from the forming body (2), and the glass ribbon (B) is cut into a predetermined dimension in a cutting chamber (6) provided on the conveyance path so that glass substrates (C) are produced.Type: GrantFiled: April 2, 2008Date of Patent: November 15, 2011Assignee: Nippon Electric Glass Co., Ltd.Inventors: Shusei Kin, Hidetaka Oda, Masahiro Tomamoto
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Publication number: 20110223386Abstract: Provided is a glass roll (1), which is formed by winding a long glass film (2) into a roll, in which the long glass film (2) includes both end edges (2a) in a width direction larger in thickness relative to a center portion (2b) in the width direction, and the long glass film (2) is wound into a roll so that the both end edges (2a) overlap one another while interposing a protective sheet (10) therebetween. Specifically, the long glass film (2) is formed by a downdraw method with selvage portions (2a) left in the both end edges in the width direction, and the long glass film (2) is wound into a roll so that the selvage portions (2a) overlap one another.Type: ApplicationFiled: March 7, 2011Publication date: September 15, 2011Inventors: Masahiro TOMAMOTO, Toru SAKURABAYASHI, Michiharu ETA
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Publication number: 20110217534Abstract: A glass for a display substrate composed of 50 to 70% SiO2, 10 to 25% Al2O3, 8.4 to 20% B2O3, 0 to 10% MgO, 6 to 15% CaO, 0 to 10% BaO, 0 to 10% SrO, 0 to 10% ZnO, 0 to 5% TiO2, 0 to 5% P2O5, 0.01 to 0.2% alkali metal, and from 0.01% to less than 0.4% ZrO2, as expressed in % by mass. The glass can have a ?-OH value of 0.20/mm or more and an area of 0.1 m2 or more. The glass is produced by mixing raw materials to provide the SiO2, Al2O3, B2O3, MgO, CaO, BaO, SrO, ZnO, TiO2, P2O5 and alkali metal contents, electrically melting the raw materials in a melting furnace constructed of a high zirconia refractory; and refining, homogenizing and forming the glass melt.Type: ApplicationFiled: May 13, 2011Publication date: September 8, 2011Inventors: Tatsuya Takaya, Masahiro Tomamoto