公开(公告)号：US09086555B2

公开(公告)日：2015-07-21

申请号：US14094308

申请日：2013-12-02

Applicant: FUJIKURA LTD. ,  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Akira Namazue ,  Yukiko Take ,  Takashi Matsuzawa ,  Ken Osato ,  Naoki Okada ,  Yusuke Yamada

IPC: G02B6/44

CPC classification number: G02B6/4403 ,  G02B6/44 ,  G02B6/448 ,  Y10T29/49826

Abstract: It is an object of the present invention to suppress a coating resin from being shaved off in an event where optical fibers are sent out from a coating dice. When a Young's modulus of ultraviolet curable resins 13 located on outermost layers of optical fibers 3 is 300 MPa or more, and the Young's modulus is 300 MPa to 600 MPa, a plurality of the optical fibers 3 in which friction force measured by the following measurement method is 0.3 N or less are arranged in parallel to one another, these respective optical fibers 3 are fixed to one another intermittently along a longitudinal direction thereof, and adhered portions 5 are formed.

Abstract translation: 本发明的一个目的是在从涂层骰子送出光纤的情况下抑制涂层树脂被刮掉。 当位于光纤3的最外层的紫外线固化树脂13的杨氏模量为300MPa以上，杨氏模量为300MPa〜600MPa时，通过以下测定测定摩擦力的多根光纤3 方法相互平行地排列为0.3N以下，这些各自的光纤3沿其长度方向间歇地固定，形成有粘接部5。

公开(公告)号：US20240418952A1

公开(公告)日：2024-12-19

申请号：US18697954

申请日：2022-09-30

Applicant: Fujikura Ltd.

Inventor： Noriaki Yamashita ,  Itaru Ishida ,  Ken Osato

IPC: G02B6/44

Abstract: An optical fiber ribbon includes optical fibers disposed in a disposition direction perpendicular to a longitudinal direction of the optical fiber ribbon and connection parts each disposed between and connecting two or more of the optical fibers adjacent in the disposition direction. The connection parts are disposed intermittently in the longitudinal direction and the disposition direction. The optical fiber ribbon has a first high-density region and a low-density region adjacent in the longitudinal direction. Two or more of the connection parts, having different positions from each other in the longitudinal direction and the disposition direction, are disposed in the first high-density region. A number density of the connection parts in the low-density region is lower than a number density of the connection parts in the first high-density region.

公开(公告)号：US20240219665A1

公开(公告)日：2024-07-04

申请号：US18425709

申请日：2024-01-29

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: A fixing structure includes: an optical fiber group constituted by a plurality of optical fibers; a tubular member through which the optical fiber group is passed; a reticulated tube, one end part of the reticulated tube being disposed on an outer periphery of the tubular member, the optical fiber group being inserted through an extended section of the reticulated tube extending out from the tubular member; and a fixing member that fixes the tubular member which has the reticulated tube disposed on the outer periphery thereof.

公开(公告)号：US20240168230A1

公开(公告)日：2024-05-23

申请号：US18427345

申请日：2024-01-30

Applicant: Fujikura Ltd.

Inventor： Soichiro Kaneko ,  Koji Tomikawa ,  Ken Osato ,  Noriaki Yamashita

IPC: G02B6/255 ,  G02B6/245 ,  G02B6/25 ,  G02B6/44 ,  G02B6/46

CPC classification number: G02B6/2555 ,  G02B6/245 ,  G02B6/25 ,  G02B6/2551 ,  G02B6/44 ,  G02B6/4403 ,  G02B6/46 ,  G02B6/255

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, wherein connecting portions of the optical fiber ribbon 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 holding state where the holder is holding the optical fibers.

公开(公告)号：US11899266B2

公开(公告)日：2024-02-13

申请号：US17632681

申请日：2020-05-12

Applicant: FUJIKURA LTD.

Inventor： Yoshie Murakoshi ,  Akira Namazue ,  Ken Osato

IPC: G02B6/44

CPC classification number: G02B6/448 ,  G02B6/4403

Abstract: [Problem] When a surface of the optical fiber ribbon is rough, the microbending loss is increased due to the irregularities formed on the surface of the optical fiber ribbon.
[Solution] An intermittently connected optical fiber ribbon of the present disclosure, includes: a plurality of optical fibers arranged in a predetermined direction; and connecting portions that intermittently connect two adjacent ones of the optical fibers. A peripheral cover portion formed of resin configuring the connecting portions is formed on a periphery of the optical fibers. An arithmetic mean roughness Ra of a surface of the peripheral cover portion is 0.41 μm or lower.

公开(公告)号：US11892694B2

公开(公告)日：2024-02-06

申请号：US17841262

申请日：2022-06-15

Applicant: FUJIKURA LTD. ,  NIPPON TELEGRAPH AND TELEPHONE CORPORATION

Inventor： Akira Namazue ,  Ken Osato ,  Naoki Okada ,  Yusuke Yamada ,  Daisuke Kakuta ,  Hisaaki Nakane ,  Shinya Hamaguchi

IPC: G02B6/44 ,  G02B6/25 ,  G02B6/255 ,  G02B6/36

CPC classification number: G02B6/4404 ,  G02B6/2551 ,  G02B6/2555 ,  G02B6/441 ,  G02B6/4403 ,  G02B6/443 ,  G02B6/4405 ,  G02B6/448 ,  G02B6/4482 ,  G02B6/3636 ,  G02B6/4489

Abstract: Provided is an optical fiber ribbon capable of achieving higher density and reduction in diameter and accurately placing optical fibers in V-shape grooves in a fusion machine without failure. The optical fiber ribbon 1 includes three or more of optical fibers 2 arranged in parallel and connecting portions 3 connecting adjacent two optical fibers 2 together, the connecting portions 3 being intermittently provided in each of a ribbon longitudinal direction and a ribbon width direction. The connecting portions 3 are each formed in such a manner as to fill resin into a gap S formed between adjacent two optical fibers 2, and both surfaces of the respective connecting portions 3 are each formed into a recess having a concave shape curved toward a center of the gap S to separate from lines 4,5 each connecting contact points of the optical fibers 2 when being placed on a horizontal surface.

公开(公告)号：US20230418013A1

公开(公告)日：2023-12-28

申请号：US18464463

申请日：2023-09-11

Applicant: Fujikura Ltd.

Inventor： Akira Namazue ,  Shogo Shimizu ,  Go Taki ,  Okimi Mukai ,  Ken Osato

IPC: G02B6/44

CPC classification number: G02B6/443 ,  G02B6/4431

Abstract: An optical fiber cable includes: a sheath including recesses and protrusions that are alternately disposed in a circumferential direction on an outer circumferential surface of the sheath; a core that includes optical fibers and is accommodated in the sheath; tensile strength members embedded in the sheath; and a ripcord that is embedded in the sheath. A marking portion protruding outward in a radial direction is disposed in the sheath. The ripcord is disposed between the marking portion and the core.

公开(公告)号：US11835778B2

公开(公告)日：2023-12-05

申请号：US17642378

申请日：2020-08-11

Applicant: FUJIKURA LTD.

Inventor： Tomoaki Kaji ,  Akira Namazue ,  Ken Osato

IPC: G02B6/44 ,  B29C48/154 ,  B29C48/09 ,  B29C48/00 ,  B29K105/00 ,  B29L11/00

CPC classification number: G02B6/4432 ,  B29C48/0021 ,  B29C48/09 ,  B29C48/154 ,  B29K2105/0026 ,  B29K2105/0097 ,  B29L2011/0075

Abstract: An optical fiber cable production method includes: feeding a core including optical fibers; winding a reinforcing wrap around the core and forming an overlapping portion in which end portions of the reinforcing wrap overlap each other at a portion of the reinforcing wrap in a circumferential direction; and performing extrusion molding of a sheath on an outside of the reinforcing wrap. The overlapping portion extends in a longitudinal direction of the optical fibers. In the performing extrusion molding, a resin that forms the sheath is inserted into a portion of the overlapping portion.

公开(公告)号：US11782228B2

公开(公告)日：2023-10-10

申请号：US17268313

申请日：2020-12-04

Applicant: Fujikura Ltd.

Inventor： Akira Namazue ,  Shogo Shimizu ,  Go Taki ,  Okimi Mukai ,  Ken Osato

IPC: G02B6/44

CPC classification number: G02B6/443 ,  G02B6/4431

Abstract: An optical fiber cable includes: a sheath including recesses and protrusions that are alternately disposed in a circumferential direction on an outer circumferential surface of the sheath; a core that includes optical fibers and is accommodated in the sheath; and tensile strength members embedded in the sheath. The core is interposed between the tensile strength members in a transverse cross-sectional view. In the transverse cross-sectional view, the tensile strength members are embedded in portions of the sheath facing outward from the core in a first direction in which the two tensile strength members face each other in the transverse cross-sectional view.

公开(公告)号：US20230251450A1

公开(公告)日：2023-08-10

申请号：US18013324

申请日：2021-06-15

Applicant: FUJIKURA LTD.

Inventor： Hironori Sato ,  Akira Namazue ,  Ken Osato

IPC: G02B6/44

CPC classification number: G02B6/448

Abstract: An optical cable includes optical fiber units each of which includes intermittently-coupled optical fiber ribbons. In at least one of the optical fiber units, in a cross section perpendicular to a longitudinal direction of the at least one of the optical fiber units, a length of a vector GU is shorter than a largest length of vectors MG of the intermittently-coupled optical fiber ribbons forming the at least one of the optical fiber units, where, in each of the intermittently-coupled optical fiber ribbons, each of the vectors MG is a vector starting from M and ending at G, M is a midpoint between optical fibers at both ends of the each of the intermittently-coupled optical fiber ribbons, and G is a center of gravity of the each of the intermittently-coupled optical fiber ribbons, and the vector GU is a resultant vector of the vectors MG.