Optical fiber cord, manufacturing method thereof, and manufacturing apparatus thereof
AssigneeFujikura Ltd.
InventorsKazunaga Kobayashi, Masahiro Kusakari, Takeshi Honjyou, Keiji Ohashi
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Abstract
The manufacturing apparatus for optical fiber cord is provided with an extrusion machine, a cooling chamber, an intermediate pulling device, a heating chamber, a final pulling device, and a winding machine wherein the machines, the devices and the chambers are disposed in this order. One or more optical fiber cores and one or more reinforcing fibers are sheathed with thermoplastic resin by the extrusion machine. The thermoplastic resin is solidified by cooling so as to be a resin sheath. The sheathed fibers are annealed by the heating chamber so that its residual stress is relieved.
Claims10
A manufacturing method for optical fiber cord, comprising:
- (1) sheathing one or more optical fiber cores and one or more reinforcing fibers running in parallel thereto with thermoplastic resin by extrusion;
- (2) solidifying the thermoplastic resin by cooling;
- and
- (3) annealing the optical fiber cores, the reinforcing fibers and the thermoplastic resin sheath.
A manufacturing apparatus for optical fiber cord comprising:
- an extrusion machine;
- a cooling chamber disposed in the downstream of the extrusion machine;
- an intermediate pulling device disposed in the downstream of the cooling chamber;
- a heating chamber disposed in the downstream of the intermediate pulling device;
- a final pulling device disposed in the downstream of the heating chamber;
- and
- a winding machine disposed in the downstream of the final pulling machine.
An optical fiber cord comprising:
- one or more optical fiber cores and one or more reinforcing fibers running in parallel thereto and a resin sheath covering the optical fiber cores and the reinforcing fibers;
- wherein the resin sheath is formed by extrusion-forming the optical fiber cores and the reinforcing fibers with thermoplastic resin, solidifying the thermoplastic resin by cooling after the extrusion-forming and annealing after the solidifying.
Dependencies are inferred from the claim text.