Impregnated vitreous (glassy) carbon graphite liner and heating

Details Impregnated vitreous (glassy) carbon graphite liner and heating Impregnated vitreous (glassy) carbon graphite liner and heating

1998-03-25

2000-04-04

Silverman, Stanley S.

Glass manufacturing

Apparatus made of special material

Metallic

6537413, 6537415, 423445R, C03B 1316

Patent

active

060446633

ABSTRACT:
The present invention provides an improvement to a fiber optic draw furnace for drawing an optical fiber from a preform. The fiber optic draw furnace has a heating element having a shape for enclosing and heating the preform, and has a graphite liner having a corresponding shape to the shape of the heating element for providing a barrier between the heating element and the preform. In the fiber optic draw furnace, either the graphite liner is a high density extruded graphite liner that is impregnated with vitreous carbon completely through its entire graphite liner matrix, or the heating element is a high density extruded graphite heating element that is impregnated with vitreous carbon completely through its entire graphite heating element matrix, or both.

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