Biconic coating die for making coated optical fibers

Details Biconic coating die for making coated optical fibers Biconic coating die for making coated optical fibers

1998-07-15

2000-02-29

Bareford, Katherine A.

Coating processes

Applying superposed diverse coating or coating a coated base

4271632, 4273898, 4274073, 4274347, 118405, 118420, 65447, 65529, B05D 118, B05D 136, B05D 506, B05C 312

Patent

active

060306645

ABSTRACT:
A method and apparatus for high velocity dual coating optical fibers includes passing the fiber to be coated through an entrance die into a coating reservoir, to which liquid coating material is supplied under pressure. The diameter of the die passage and the pressure of the fluid is sufficient to prevent air from entering the reservoir. The coated fiber is passed through a centering and sizing die wherein the recirculation of excess coating material is controlled to produce centering forces on the fiber at the high fiber velocity, and wherein the initial coating is sized. The fiber is then passed through a second coating reservoir into an exit die which sizes the second coating. Upon leaving the exit die, the coatings are cured.

REFERENCES:
patent: 4704307 (1987-11-01), Jochem et al.
patent: 5127361 (1992-07-01), Matsuda et al.

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