Method of manufacturing a self-support optical cable

Details Method of manufacturing a self-support optical cable Method of manufacturing a self-support optical cable

1998-01-30

2000-04-25

Vargot, Mathieu D.

Plastic and nonmetallic article shaping or treating: processes

Optical article shaping or treating

Optical fiber, waveguide, or preform

264 129, B29D 1100

Patent

active

060540702

ABSTRACT:
In a method of manufacturing a self-support optical cable, a support wire and an optical cable body arranged in parallel are fed with each other; a sheath into an eight figure shape is extruded by an extruder to collectively coat the outer circumferences of the support wire and the optical cable body with the sheath, and thereafter, the self-support optical cable is cooled before hardening while the cable passes through a plurality of guide wheels so that an excess length is given to the optical cable body. In this method, the guide wheels are disposed in a cooling water tank in a manner so that a guide wheel contacting with one side of the self-support optical cable with the sheath in a softened state and another guide wheel contacting with the other side of the self-support optical cable with the sheath in a softened state are disposed alternately in the feed-out direction, said excess length is controlled based on the tension of the support wire, or the tension of said optical cable body at an inlet portion of said extruder is reduced by a tension reducing device.

REFERENCES:
patent: 4585406 (1986-04-01), Ravela
patent: 4814116 (1989-03-01), Oestreich et al.
patent: 4861525 (1989-08-01), Oestreich
patent: 4893998 (1990-01-01), Schlaeppi et al.
patent: 5015063 (1991-05-01), Panuska et al.
patent: 5372757 (1994-12-01), Schneider

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