Patents by Inventor Kumiko Tachibana
Kumiko Tachibana 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: 11372155Abstract: An optical fiber comprises a glass fiber; a primary resin layer coating an outer periphery of the glass fiber; and a secondary resin layer coating an outer periphery of the primary resin layer, and a pH of the primary resin layer is greater than a pH of the secondary resin layer.Type: GrantFiled: April 17, 2018Date of Patent: June 28, 2022Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kumiko Tachibana, Noriaki Iwaguchi, Takashi Fujii
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Patent number: 11022549Abstract: An optical fiber inspecting device is disclosed. The optical fiber inspecting device includes a first light-emitting unit that irradiates an optical fiber with a first light beam, the optical fiber including a glass fiber and a coating resin and moving in an axial direction, and a first light-receiving unit that receives scattered light resulting from the first light beam scattered in the optical fiber, and converts the scattered light to an electrical signal. An optical axis of the first light-receiving unit passes through an irradiation position where the first light beam strikes the optical fiber, and the first light beam and the optical axis of the first light-receiving unit diagonally intersect each other, thereby preventing the first light beam from directly entering the first light-receiving unit.Type: GrantFiled: December 23, 2019Date of Patent: June 1, 2021Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Hiroshi Kohda, Kumiko Tachibana, Takashi Fujii
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Publication number: 20210088719Abstract: An optical fiber comprises a glass fiber; a primary resin layer coating an outer periphery of the glass fiber; and a secondary resin layer coating an outer periphery of the primary resin layer, and a pH of the primary resin layer is greater than a pH of the secondary resin layer.Type: ApplicationFiled: April 17, 2018Publication date: March 25, 2021Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kumiko TACHIBANA, Noriaki IWAGUCHI, Takashi FUJII
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Publication number: 20200132598Abstract: An optical fiber inspecting device is disclosed. The optical fiber inspecting device includes a first light-emitting unit that irradiates an optical fiber with a first light beam, the optical fiber including a glass fiber and a coating resin and moving in an axial direction, and a first light-receiving unit that receives scattered light resulting from the first light beam scattered in the optical fiber, and converts the scattered light to an electrical signal. An optical axis of the first light-receiving unit passes through an irradiation position where the first light beam strikes the optical fiber, and the first light beam and the optical axis of the first light-receiving unit diagonally intersect each other, thereby preventing the first light beam from directly entering the first light-receiving unit.Type: ApplicationFiled: December 23, 2019Publication date: April 30, 2020Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Hiroshi KOHDA, Kumiko TACHIBANA, Takashi FUJII
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Patent number: 10551307Abstract: An optical fiber inspecting device is disclosed. The optical fiber inspecting device includes a first light-emitting unit that irradiates an optical fiber with a first light beam, the optical fiber including a glass fiber and a coating resin and moving in an axial direction, and a first light-receiving unit that receives scattered light resulting from the first light beam scattered in the optical fiber, and converts the scattered light to an electrical signal. An optical axis of the first light-receiving unit passes through an irradiation position where the first light beam strikes the optical fiber, and the first light beam and the optical axis of the first light-receiving unit diagonally intersect each other, thereby preventing the first light beam from directly entering the first light-receiving unit.Type: GrantFiled: March 24, 2017Date of Patent: February 4, 2020Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Hiroshi Kohda, Kumiko Tachibana, Takashi Fujii
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Publication number: 20190049372Abstract: An optical fiber inspecting device is disclosed. The optical fiber inspecting device includes a first light-emitting unit that irradiates an optical fiber with a first light beam, the optical fiber including a glass fiber and a coating resin and moving in an axial direction, and a first light-receiving unit that receives scattered light resulting from the first light beam scattered in the optical fiber, and converts the scattered light to an electrical signal. An optical axis of the first light-receiving unit passes through an irradiation position where the first light beam strikes the optical fiber, and the first light beam and the optical axis of the first light-receiving unit diagonally intersect each other, thereby preventing the first light beam from directly entering the first light-receiving unit.Type: ApplicationFiled: March 24, 2017Publication date: February 14, 2019Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Hiroshi KOHDA, Kumiko TACHIBANA, Takashi FUJII
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Patent number: 10197724Abstract: An optical fiber comprises a glass fiber having a core and a cladding with which the core is covered, and a coating resin layer with which the glass fiber is covered, the coating resin layer having a colored layer of a thickness of 10 ?m or more, wherein a change rate of a yellow index of the coating resin layer after aging due to temperature and humidity under an environment of 85° C. and 85% RH for 30 days is 5 or less per day.Type: GrantFiled: December 25, 2014Date of Patent: February 5, 2019Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kumiko Tachibana, Takashi Fujii
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Publication number: 20180364437Abstract: An optical fiber comprises a glass fiber; and a coating resin layer coating an outer periphery of the glass fiber, the coating resin layer comprises a cured product of an ultraviolet curable resin composition containing a urethane oligomer, a monomer, and a photopolymerization initiator, and the urethane oligomer contains a one-end non-reactive oligomer having a (meth)acryloyl group at one end and having an alkoxy group having 3 to 18 carbon atoms at the other end.Type: ApplicationFiled: June 14, 2018Publication date: December 20, 2018Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kumiko TACHIBANA, Masaji OOKIDO, Takashi FUJII
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Patent number: 9964700Abstract: An optical fiber comprises a glass fiber, and a coating resin layer with which the glass fiber is covered, the coating resin layer has a plurality of layers, the plurality of layers includes a first layer being in contact with the glass fiber, and a longest diameter at ?40° C. of a void formed in the first layer is 100% or more and 300% or less of a longest diameter at 23° C. thereof, or a longest diameter at ?40° C. of a void formed in the first layer is 100% or more and 600% or less of a longest diameter at 23° C. thereof, and a Young's modulus of the first layer is 0.3 MPa or less.Type: GrantFiled: December 2, 2015Date of Patent: May 8, 2018Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kumiko Tachibana, Takashi Fujii, Noriaki Iwaguchi
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Patent number: 9891381Abstract: Provided is a coated optical fiber excellent in both characteristics of the microbending loss resistance and the low-temperature characteristic. The coated optical fiber 1 comprises an optical fiber 10 that has a cladding layer composed of glass formed on an outer periphery of a glass core, a primary coating layer 20 that coats an outer periphery of the optical fiber 10, and a secondary coating layer 30 that coats an outer periphery of the primary coating layer 20, wherein the primary coating layer 20 has a Young's modulus of 1.2 MPa or less, the secondary coating layer 30 has a Young's modulus of 700 MPa or more, and the primary coating layer 20 contains tin in a content of 70 ppm or less.Type: GrantFiled: April 10, 2014Date of Patent: February 13, 2018Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Noriaki Iwaguchi, Masuo Iida, Kumiko Tachibana, Takashi Takada, Takashi Fujii
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Publication number: 20170307814Abstract: An optical fiber comprises a glass fiber having a core and a cladding with which the core is covered, and a coating resin layer with which the glass fiber is covered, the coating resin layer having a colored layer of a thickness of 10 ?m or more, wherein a change rate of a yellow index of the coating resin layer after aging due to temperature and humidity under an environment of 85° C. and 85% RH for 30 days is 5 or less per day.Type: ApplicationFiled: December 25, 2014Publication date: October 26, 2017Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kumiko TACHIBANA, Takashi FUJII
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Publication number: 20170242209Abstract: There is provided an optical fiber in which no color peeling occurs at the time of separation into a single optical fiber from an optical fiber ribbon and a resin coating layer is sufficiently cured. An optical fiber comprises a glass fiber and a resin coating layer that covers the outer periphery of the glass fiber, wherein the resin coating layer has a colored layer having a thickness of 10 ?m or more and 0.06 to 1.8% by mass of titanium element is contained in the resin coating layer, and an optical fiber ribbon comprises a plurality of the optical fibers arranged in parallel, the plurality of the optical fibers being connected by a connecting material.Type: ApplicationFiled: October 17, 2014Publication date: August 24, 2017Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kumiko TACHIBANA, Takashi FUJII
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Publication number: 20170184785Abstract: An optical fiber comprises a glass fiber, and a coating resin layer with which the glass fiber is covered, the coating resin layer has a plurality of layers, the plurality of layers includes a first layer being in contact with the glass fiber, and a longest diameter at ?40° C. of a void formed in the first layer is 100% or more and 300% or less of a longest diameter at 23° C. thereof, or a longest diameter at ?40° C. of a void formed in the first layer is 100% or more and 600% or less of a longest diameter at 23° C. thereof, and a Young's modulus of the first layer is 0.3 MPa or less.Type: ApplicationFiled: December 2, 2015Publication date: June 29, 2017Inventors: Kumiko TACHIBANA, Takashi FUJII, Noriaki IWAGUCHI
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Patent number: 9632241Abstract: An optical fiber capable of achieving both of the ZSA property and the rapid curability is provided. The optical fiber includes a glass optical fiber 13, a primary coating layer 16 that coats an outer periphery of the glass optical fiber 13, and a secondary optical fiber 17 that coats an outer periphery of the primary coating layer 16. Young's modulus of the primary coating layer 16 is 1.2 MPa or less and Young's modulus of the secondary coating layer 17 is 800 MPa or more. Sulfur content of the surface of the glass optical fiber 13 is 0.2% by atom or more. Sulfur is not present in the vicinity of the outer periphery of the primary coating layer 16.Type: GrantFiled: November 7, 2014Date of Patent: April 25, 2017Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Noriaki Iwaguchi, Masuo Iida, Kumiko Tachibana, Takashi Fujii
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Patent number: 9557477Abstract: A coated glass fiber 1 comprising a glass fiber 10 and one or more coating layers each composed of an ultraviolet curable resin on the outer circumference of the glass fiber 10, wherein the ultraviolet curable resin constituting at least one of the coating layers is formed of an ultraviolet curable coating material containing a silane coupling agent and a photoacid generator. The coated optical fiber 1 coated optical fiber having a high dynamic fatigue coefficient since adhesion between the surface of the glass fiber and the resin coating layer is satisfactory.Type: GrantFiled: June 21, 2013Date of Patent: January 31, 2017Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kumiko Tachibana, Takashi Fujii, Takashi Takada, Noriaki Iwaguchi
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Patent number: 9551828Abstract: The present invention relates to an optical fiber containing a glass fiber and a resinous coating layer that covers a periphery of the glass fiber, in which the resinous coating layer contains an ethanol of 10 mg or less or a methanol of 2 mg or less per gram of the resinous coating layer.Type: GrantFiled: November 12, 2015Date of Patent: January 24, 2017Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kumiko Tachibana, Masuo Iida, Takashi Fujii
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Publication number: 20160306109Abstract: An optical fiber capable of achieving both of the ZSA property and the rapid curability is provided. The optical fiber includes a glass optical fiber 13, a primary coating layer 16 that coats an outer periphery of the glass optical fiber 13, and a secondary optical fiber 17 that coats an outer periphery of the primary coating layer 16. Young's modulus of the primary coating layer 16 is 1.2 MPa or less and Young's modulus of the secondary coating layer 17 is 800 MPa or more. Sulfur content of the surface of the glass optical fiber 13 is 0.2% by atom or more. Sulfur is not present in the vicinity of the outer periphery of the primary coating layer 16.Type: ApplicationFiled: November 7, 2014Publication date: October 20, 2016Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Noriaki IWAGUCHI, Masuo IIDA, Kumiko TACHIBANA, Takashi FUJII
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Publication number: 20160139332Abstract: The present invention relates to an optical fiber containing a glass fiber and a resinous coating layer that covers a periphery of the glass fiber, in which the resinous coating layer contains an ethanol of 10 mg or less or a methanol of 2 mg or less per gram of the resinous coating layer.Type: ApplicationFiled: November 12, 2015Publication date: May 19, 2016Inventors: Kumiko TACHIBANA, Masuo IIDA, Takashi FUJII
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Patent number: 9169156Abstract: The present invention relates to an optical fiber containing a glass fiber and a coating layer in contact with the outer circumference of the glass fiber, and a method for manufacturing the optical fiber, in which the coating layer contains silane coupling agents represented by the following formulae (1) and (2): in the formulae, R1 represents a group capable of reacting with an acryl group or an acryl group, and R2 to R8 are each the same or different and represent an alkyl group.Type: GrantFiled: April 9, 2014Date of Patent: October 27, 2015Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kumiko Tachibana, Takashi Fujii, Noriaki Iwaguchi
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Patent number: 9134495Abstract: A coated glass fiber 1 comprising a glass fiber 10 and a resin coating layer containing an inner layer 20 and an outer layer 30 provided on the outer circumference of the glass fiber 10, wherein the resin constituting the inner layer 20 is formed by curing a urethane-based ultraviolet curable resin composition containing a surfactant in an amount of 0.1 to 1.0% by weight and Young's modulus thereof is from 0.3 to 10 MPa. The coated optical fiber has a good water immersion resistance.Type: GrantFiled: June 10, 2013Date of Patent: September 15, 2015Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kumiko Tachibana, Takashi Fujii, Takashi Takada, Noriaki Iwaguchi