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公开(公告)号：US20210191061A1
公开(公告)日：2021-06-24
申请号：US16078586
申请日：2016-11-08
Applicant: FUJIKURA LTD.
Inventor： Mizuki Isaji , Soichiro Kaneko , Ken Osato
IPC: G02B6/44 , C03C25/1065 , C03C25/326
Abstract: A method for manufacturing an optical fiber ribbon includes: forming a colored layer on to each of a plurality of optical fibers and forming an optical fiber ribbon by curing a connecting material applied to a surface of the colored layer of each of the optical fibers to form connection parts that connect adjacent ones of the optical fibers. Forming the colored layer further includes: applying a coloring agent to the optical fibers and curing the coloring agent such that uncured resin remains on the surface of the colored layer. Forming the optical fiber ribbon further includes: applying the connecting material to the surface with the uncured resin and curing the connecting material and the uncured resin on the surface of the colored layer.
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公开(公告)号：US10705305B2
公开(公告)日：2020-07-07
申请号：US16334046
申请日：2017-09-08
Applicant: FUJIKURA LTD.
Inventor： Soichiro Kaneko , Tomoaki Kaji , Mizuki Isaji , Kouji Tomikawa , Ken Osato
Abstract: An optical fiber unit includes: a plurality of optical fibers; and at least two binding materials that bind the plurality of optical fibers. The two binding materials are wound around the plurality of optical fibers in an SZ shape and adhered to each other at reversed portions of the SZ shape to form an adhesive part. The adhesive part extends along a longitudinal direction where the optical fiber unit extends, and 0.15≤L/(P/2)≤0.8 is satisfied where L is a length of the adhesive part in the longitudinal direction and P is a binding pitch of the two binding materials in the longitudinal direction.
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公开(公告)号：US10634863B2
公开(公告)日：2020-04-28
申请号：US16326097
申请日：2017-09-11
Applicant: FUJIKURA LTD.
Inventor： Tomoaki Kaji , Soichiro Kaneko , Mizuki Isaji , Kouji Tomikawa , Ken Osato
Abstract: An optical fiber unit includes a plurality of optical fibers; and two binding materials that bind the optical fibers. The two binding materials are wound around the optical fibers in an SZ shape, and are adhered to each other at respective reversed portions that form an adhesive part. The adhesive part has a plurality of intersection points of center lines of the two binding materials.
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公开(公告)号：US20240329348A1
公开(公告)日：2024-10-03
申请号：US18580021
申请日：2022-04-19
Applicant: Fujikura Ltd.
Inventor： Shogo Shimizu , Soichiro Kaneko , Akira Namazue , Ken Osato
IPC: G02B6/44
CPC classification number: G02B6/4433 , G02B6/449
Abstract: An optical cable includes optical fiber units each including a bundle of optical fibers. The optical fiber units are twisted together in an S-Z configuration in which a twisting direction of the optical fiber units is reversed at a reversal part and an adjacent reversal part adjacent to the reversal part. A twisting angle, by which the optical fiber units are twisted in a circumferential direction between the reversal part and the adjacent reversal part, is 540 degrees or greater.
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公开(公告)号：US20240184076A1
公开(公告)日：2024-06-06
申请号：US18285952
申请日：2022-03-02
Applicant: Fujikura Ltd.
Inventor： Soichiro Kaneko , Masayuki Ishioka , Ken Osato
IPC: G02B6/48
CPC classification number: G02B6/48
Abstract: A conduit for laying a cable includes a suspension wire, one or more hangers held by the suspension wire and having an accommodation space that accommodates the cable, and a groove extending along an axial direction of the suspension wire. The groove has an opening connected to the accommodation space. The opening has a width smaller than a maximum width of an interior of the groove.
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Patent Agency Ranking
公开(公告)号：US11921336B2
公开(公告)日：2024-03-05
申请号：US17982661
申请日：2022-11-08
Applicant: FUJIKURA LTD.
Inventor： Go Taki , Masayuki Ishioka , Mizuki Isaji , Tomoaki Kaji , Soichiro Kaneko , Koji Tomikawa , Akira Namazue , Ken Osato
IPC: G02B6/44
CPC classification number: G02B6/443 , G02B6/4486
Abstract: An optical fiber protective unit includes: a reticulated tube; and a tubular member that is inserted through the reticulated tube and that is configured to accommodate a plurality of optical fibers. The reticulated tube is disposed on an outer periphery of the tubular member in a state folded in a longitudinal direction. Both end parts of the reticulated tube are located on the outer periphery of the tubular member.
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公开(公告)号：US20230273381A1
公开(公告)日：2023-08-31
申请号：US18016115
申请日：2021-08-25
Applicant: Fujikura Ltd. , NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Inventor： Soichiro Kaneko , Masatoshi Ohno , Akira Namazue , Ken Osato , Yusuke Yamada , Yuta Maruo , Akira Sakurai , Shigekatsu Tetsutani , Hiroaki Tanioka
IPC: G02B6/44
CPC classification number: G02B6/4429
Abstract: An optical fiber cable includes: a sheath; and a core including twisted optical fibers disposed in an accommodation space in the sheath. Each of the twisted optical fibers includes: a glass portion, a primary layer that covers the glass portion, and a secondary layer that covers the primary layer. A fiber pulling force when pulling out the twisted optical fibers is equal to or greater 15 N/10 m. A value of an index Q is less than 20.
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公开(公告)号：US20230053868A1
公开(公告)日：2023-02-23
申请号：US17982661
申请日：2022-11-08
Applicant: FUJIKURA LTD.
Inventor： Go Taki , Masayuki Ishioka , Mizuki Isaji , Tomoaki Kaji , Soichiro Kaneko , Koji Tomikawa , Akira Namazue , Ken Osato
IPC: G02B6/44
Abstract: An optical fiber protective unit includes: a reticulated tube; and a tubular member that is inserted through the reticulated tube and that is configured to accommodate a plurality of optical fibers. The reticulated tube is disposed on an outer periphery of the tubular member in a state folded in a longitudinal direction. Both end parts of the reticulated tube are located on the outer periphery of the tubular member.
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公开(公告)号：US20220317375A1
公开(公告)日：2022-10-06
申请号：US17634138
申请日：2020-07-13
Applicant: FUJIKURA LTD.
Inventor： Soichiro Kaneko , Koji Tomikawa , Ken Osato , Noriaki Yamashita
Abstract: An optical fiber arrangement method includes: preparing an intermittently connected optical fiber ribbon including optical fibers arranged side by side at a first pitch larger than a fiber diameter; holding a non-connecting region of the optical fiber ribbon with a holder, where connecting portions intermittently connect the optical fibers extending out from the holder to each other; changing a width of the optical fiber ribbon in an interior of the holder; and arranging the optical fibers, extending out from the holder, with intervals of the optical fibers changed from the first pitch to a second pitch smaller than the first pitch by removing the connecting portions in a state where the holder is holding the optical fibers.
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公开(公告)号：US20190212512A1
公开(公告)日：2019-07-11
申请号：US16326097
申请日：2017-09-11
Applicant: FUJIKURA LTD.
Inventor： Tomoaki Kaji , Soichiro Kaneko , Mizuki Isaji , Kouji Tomikawa , Ken Osato
Abstract: An optical fiber unit includes a plurality of optical fibers; and two binding materials that bind the optical fibers. The two binding materials are wound around the optical fibers in an SZ shape, and are adhered to each other at respective reversed portions that form an adhesive part. The adhesive part has a plurality of intersection points of center lines of the two binding materials.
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