US 11,892,700 B2
Optical fiber unit and optical fiber cable
Akihisa Watanabe, Osaka (JP); Masakazu Takami, Osaka (JP); and Fumiaki Sato, Osaka (JP)
Assigned to SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
Appl. No. 17/641,896
Filed by SUMITOMO ELECTRIC INDUSTRIES, LTD., Osaka (JP)
PCT Filed Sep. 11, 2020, PCT No. PCT/JP2020/034490
§ 371(c)(1), (2) Date Mar. 10, 2022,
PCT Pub. No. WO2021/049626, PCT Pub. Date Mar. 18, 2021.
Claims priority of application No. 2019-165268 (JP), filed on Sep. 11, 2019.
Prior Publication US 2022/0326467 A1, Oct. 13, 2022
Int. Cl. G02B 6/44 (2006.01)
CPC G02B 6/4482 (2013.01) [G02B 6/441 (2013.01); G02B 6/4403 (2013.01); G02B 6/448 (2013.01)] 4 Claims
OG exemplary drawing
 
1. An optical fiber unit, comprising:
an optical fiber ribbon in which a plurality of optical fibers are arranged in parallel and connected to each other;
a colored bundle tape longitudinally wrapped around an optical fiber ribbon bundle in which a plurality of the optical fiber ribbons are stranded together; and
a colored bundle yarn spirally wound around the optical fiber ribbon bundle and the bundle tape, wherein
the colored bundle tape covers a whole periphery of the optical fiber ribbon bundle in a range of 25% or more and 100% or less,
the colored bundle tape covers a given area of the optical fiber ribbon bundle, and
the given area is 50% or more and 100% or less of the entire circumference of the optical fiber ribbon bundle in a cross sectional view.