公开(公告)号：US11592634B2

公开(公告)日：2023-02-28

申请号：US17260792

申请日：2019-09-03

Applicant: Fujikura Ltd.

Inventor： Shinnosuke Sato ,  Mizuki Isaji ,  Koji Tomikawa ,  Ken Osato

IPC: G02B6/44

Abstract: An optical fiber cable includes: optical fiber units each having optical fibers; a wrapping tube that wraps around the optical fiber units; a filling disposed inside the wrapping tube; and a sheath that covers the wrapping tube. The optical fiber units includes outer units that are disposed at an outermost layer of the optical fiber units. The outer units are twisted in an SZ shape around a cable central axis of the optical fiber cable. The filling is sandwiched between one of the outer units and the wrapping tube in a cross-sectional view.

公开(公告)号：US11262515B2

公开(公告)日：2022-03-01

申请号：US16340626

申请日：2017-11-17

Applicant: FUJIKURA LTD.

Inventor： Masatoshi Ohno ,  Shinnosuke Sato ,  Mizuki Isaji ,  Kouji Tomikawa ,  Akira Namazue ,  Ken Osato

IPC: G02B6/44

Abstract: An optical fiber cable includes a core that includes an assembled plurality of optical fibers; an inner sheath that accommodates the core therein, a pair of tension members that are embedded in the inner sheath and that are disposed on opposite sides of the core, and an outer sheath that covers the inner sheath. The inner sheath is formed with a dividing portion that divides an inner peripheral surface and an outer peripheral surface of the inner sheath in a circumferential direction. The dividing portion extends along a longitudinal direction in which the optical fiber cable extends.

公开(公告)号：US20190025156A1

公开(公告)日：2019-01-24

申请号：US16068549

申请日：2016-07-14

Applicant: FUJIKURA LTD.

Inventor： Hiroyuki Takahashi ,  Mizuki Isaji

IPC: G01M11/00 ,  G01N21/892

Abstract: A method for inspecting an intermittent connection type optical fiber ribbon includes: accumulating one-dimensional images in a width direction of the intermittent connection type optical fiber ribbon, arranged intermittently with connection parts that connect adjacent optical fibers by repeatedly capturing images of the intermittent connection type optical fiber ribbon along the width direction while moving the intermittent connection type optical fiber ribbon in a longitudinal direction; and creating a two-dimensional image of the intermittent connection type optical fiber ribbon by aligning the one-dimensional images in a second direction orthogonal to a first direction where pixels configuring the one-dimensional image are aligned.

公开(公告)号：US09541722B2

公开(公告)日：2017-01-10

申请号：US14889058

申请日：2014-04-28

Applicant: FUJIKURA LTD. ,  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Yoshie Sajima ,  Takashi Matsuzawa ,  Mizuki Isaji ,  Ken Osato ,  Naoki Okada ,  Hisaaki Nakane ,  Yusuke Yamada ,  Daisuke Kakuta ,  Shinya Hamaguchi ,  Yukihiko Shibata

IPC: G02B6/44

CPC classification number: G02B6/4404 ,  G02B6/4495 ,  G02B6/4498

Abstract: An optical fiber ribbon includes a plurality of optical fiber cores arranged in parallel spaced from each other; and a tape forming member having a coating portion covering an outer circumference of the optical fiber cores, and a coupling portion, integrally formed with the coating portion, intermittently coupling adjacent optical fiber cores, wherein the coating portion has an opening portion to expose a part of surfaces of the optical fiber cores, and at least a part of the coating portion is continuous in a longitudinal direction of the optical fiber cores.

Abstract translation: 光纤带包括彼此平行布置的多个光纤芯; 以及具有覆盖光纤芯的外周的涂布部分的带形成部件和与涂覆部分一体形成的连接部分，间断地连接相邻的光纤芯，其中涂覆部分具有露出部分的开口部分 所述光纤芯的表面的至少一部分在所述光纤芯的长度方向上连续。

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.

公开(公告)号：US20230161125A1

公开(公告)日：2023-05-25

申请号：US18156658

申请日：2023-01-19

Applicant: Fujikura Ltd.

Inventor： Shinnosuke Sato ,  Mizuki Isaji ,  Koji Tomikawa ,  Ken Osato

IPC: G02B6/44

CPC classification number: G02B6/443 ,  G02B6/4434 ,  G02B6/449

Abstract: An optical fiber cable includes: optical fiber units each comprising optical fibers, and twisted together in an SZ shape; a wrapping tube that wraps around the optical fiber units; fillings disposed inside the wrapping tube, wherein the fillings include at least one first filling and at least one second filling that are located between two adjacent optical fiber units; and a sheath that covers the wrapping tube. The first filling is in contact with the wrapping tube. The second filling is located more radially inward than the first filling in a radial direction.

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.

公开(公告)号：US11221457B2

公开(公告)日：2022-01-11

申请号：US16753164

申请日：2018-07-23

Applicant: FUJIKURA LTD.

Inventor： Shizuka Sekine ,  Mizuki Isaji ,  Kouji Tomikawa ,  Ken Osato

IPC: G02B6/44

Abstract: An intermittent connection-type optical fiber ribbon including: optical fibers aligned in a width direction of the intermittent connection-type optical fiber ribbon; and a connection part disposed between two separation spaces that are aligned in a lengthwise direction of the intermittent connection-type optical fiber ribbon and that separate adjacent ones of the optical fibers. A percentage content of the air bubbles is equal to or less than 15.5%. The percentage content of the air bubbles is a proportion of a total area of the air bubbles contained in the connection part to an area of the connection part in a section acquired by cutting the intermittent connection-type optical fiber in the width direction.

公开(公告)号：US20200292771A1

公开(公告)日：2020-09-17

申请号：US16753164

申请日：2018-07-23

Applicant: FUJIKURA LTD.

Inventor： Shizuka Sekine ,  Mizuki Isaji ,  Kouji Tomikawa ,  Ken Osato

IPC: G02B6/44

Abstract: An intermittent connection-type optical fiber ribbon including: optical fibers aligned in a width direction of the intermittent connection-type optical fiber ribbon; and a connection part disposed between two separation spaces that are aligned in a lengthwise direction of the intermittent connection-type optical fiber ribbon and that separate adjacent ones of the optical fibers. A percentage content of the air bubbles is equal to or less than 15.5%. The percentage content of the air bubbles is a proportion of a total area of the air bubbles contained in the connection part to an area of the connection part in a section acquired by cutting the intermittent connection-type optical fiber in the width direction.

公开(公告)号：US20190227248A1

公开(公告)日：2019-07-25

申请号：US16312669

申请日：2017-07-31

Applicant: FUJIKURA LTD. ,  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Mizuki Isaji ,  Masatoshi Ohno ,  Shinnosuke Sato ,  Kouji Tomikawa ,  Akira Namazue ,  Ken Osato ,  Naoki Nakagawa ,  Yuji Aoyagi ,  Shigekatsu Tetsutani

IPC: G02B6/44

Abstract: An optical fiber cable includes: a core comprising gathered optical fibers; an inner sheath housing the core; a wire body embedded in the inner sheath; tension members embedded in the inner sheath, wherein the core is interposed between the tension members; a reinforcing sheet that covers the inner sheath; and an outer sheath that covers the reinforcing sheet, wherein in the inner sheath, ti