| 摘要 |
Thermal stress arising in a carbon heater in a glass fiber drawing furnace is reduced, and breakage thereof is prevented. The therman stress arising in a carbon heater is reduced by configuring so that a cylindrical carbon heater is supported by means of two electrodes that are inserted into the interior of the drawing furnace body from two opposing locations, and at least one of the electrodes is inserted into a cylindrical slide bush affixed to the drawing furnace body and is supported thereby so as to be able to slide in the axial direction.
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