Graphite element for use in a furnace for drawing optical fiber

Details Graphite element for use in a furnace for drawing optical fiber Graphite element for use in a furnace for drawing optical fiber

1981-09-28

1983-08-23

Lindsay, Jr., Robert L.

Glass manufacturing

Processes

With shaping of particulate material and subsequent fusing...

65 2, 65 12, 373134, C03B 3707, C03B 3709

Patent

active

044001908

ABSTRACT:
A furnace for drawing optical fiber includes a graphite element of generally cylindrical shape with a reduced central cross-sectional configuration having a flange at opposite ends thereof and having an axial hole therethrough including a central internal element chamber for receiving a glass preform, means for heating the reduced central cross-sectional configuration, and, hence, the central internal element chamber, so that an optical fiber can be drawn from the preform. The invention relates to providing a relationship between the internal diameter of the central internal element chamber and the inner diameter of the exhaust tubes so as to minimize gas turbulence within the central internal element chamber and thereby control the diameter of an optical fiber being drawn. The relationships can be such that the internal diameter of the central internal element chamber and the inner diameters of an input exhaust tube and an exit exhaust tube are substantially equal. The transitions from an enlarged hole to the central internal element chamber can be by way of tapers.

REFERENCES:
patent: 4030901 (1977-06-01), Kaiser
patent: 4174842 (1979-11-01), Partus

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