公开(公告)号：US20240319463A1

公开(公告)日：2024-09-26

申请号：US18578638

申请日：2022-04-25

Applicant: Fujikura Ltd.

Inventor： Noriaki Yamashita ,  Itaru Ishida ,  Ken Osato

IPC: G02B6/44

CPC classification number: G02B6/4403

Abstract: An optical fiber ribbon includes five or more optical fibers disposed in a disposition direction perpendicular to a longitudinal direction of the optical fiber ribbon and connection parts disposed intermittently in the longitudinal and disposition directions. Each of the connection parts is disposed between and connects adjacent ones of the optical fibers. The optical fiber ribbon has a first high-density region and a first low-density region disposed at different positions in the longitudinal direction and a second high-density region and a second low-density region disposed at different positions in the longitudinal direction. At least two of the connection parts having different positions from each other in the longitudinal and disposition directions are disposed in the first high-density region. At least another two of the connection parts having different positions from each other in the longitudinal and disposition directions are disposed in the second high-density region.

公开(公告)号：US20240231029A9

公开(公告)日：2024-07-11

申请号：US18397026

申请日：2023-12-27

Applicant: Fujikura Ltd.

Inventor： Yoshie Murakoshi ,  Akira Namazue ,  Ken Osato

IPC: G02B6/44

CPC classification number: G02B6/448 ,  G02B6/4403

Abstract: An optical fiber ribbon includes: optical fibers disposed side by side in a predetermined direction; and connecting portions that connect two adjacent ones of the optical fibers. A peripheral resin portion is formed on a periphery of the optical fibers. An arithmetic mean roughness Ra of a surface of the peripheral resin portion is 0.41 μm or lower. A ten-point mean roughness Rz of a surface of the peripheral resin portion is 1.4 μm or lower.

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.

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：US20240053562A1

公开(公告)日：2024-02-15

申请号：US18384439

申请日：2023-10-27

Applicant: Fujikura Ltd.

Inventor： Tomoaki Kaji ,  Akira Namazue ,  Ken Osato

IPC: G02B6/44 ,  B29C48/154 ,  B29C48/09 ,  B29C48/00

CPC classification number: G02B6/4432 ,  B29C48/154 ,  B29C48/09 ,  B29C48/0021 ,  B29K2105/0026

Abstract: An optical fiber cable includes: a core including optical fibers; a reinforcing wrap that surrounds the core; and a sheath that accommodates the core and the reinforcing wrap. The reinforcing wrap includes an overlapping portion. A first end portion of the reinforcing wrap overlaps a second end portion of the reinforcing wrap at a portion of the reinforcing wrap in a circumferential direction of the optical fiber cable in a cross-sectional view.

公开(公告)号：US20240053559A1

公开(公告)日：2024-02-15

申请号：US18264927

申请日：2022-04-27

Applicant: Fujikura Ltd.

Inventor： Shinnosuke Sato ,  Daisuke Hikima ,  Daiki Takeda ,  Ken Osato

IPC: G02B6/44

CPC classification number: G02B6/443

Abstract: An optical cable includes an optical fiber, an outer sheath that houses the optical fiber, and a tubular reinforcement sheet disposed between the optical fiber and the outer sheath. In a cross section perpendicular to a length direction of the optical cable, an adhesive strength between the tubular reinforcement sheet and the outer sheath in a first zone is stronger than an adhesive strength between the tubular reinforcement sheet and the outer sheath in a second zone.

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.

公开(公告)号：US20230178972A1

公开(公告)日：2023-06-08

申请号：US17925143

申请日：2021-02-16

Applicant: Fujikura Ltd.

Inventor： Go Taki ,  Ryo Inagaki ,  Ken Osato ,  Masayuki Ishioka

IPC: H02G7/06 ,  H02G1/02

CPC classification number: H02G7/06 ,  H02G1/02 ,  H02G7/20

Abstract: A bundling suspension wire includes: a suspension wire that includes a supporting wire and a coat coating the supporting wire; a hanger member that is suspended from the suspension wire and into which a cable is configured to be inserted; and wire threading cords that are inserted into the hanger 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.