METHOD AND APPARATUS FOR SUPPRESSING FLOW INSTABILITIES IN AN OPTICAL FIBER DRAW SYSTEM

METHOD AND APPARATUS FOR SUPPRESSING FLOW INSTABILITIES IN AN OPTICAL FIBER DRAW SYSTEM

A furnace system includes a muffle defining a furnace cavity. A lower heater is coupled to the muffle and is configured to create a hot zone within the furnace cavity having a temperature of about 1900 C or greater. An upper muffle extension is positioned above the muffle and defines a handle cavity...

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Hauptverfasser: ROBERT CLARK MOORE, TAMMY M. HOFFMANN, JOHN MICHAEL JEWELL, NIKOLAOS PANTELIS KLADIAS, ERLING RICHARD ANDERSON
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
GLASS
MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
METALLURGY
MINERAL OR SLAG WOOL
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creator ROBERT CLARK MOORE
TAMMY M. HOFFMANN
JOHN MICHAEL JEWELL
NIKOLAOS PANTELIS KLADIAS
ERLING RICHARD ANDERSON
description A furnace system includes a muffle defining a furnace cavity. A lower heater is coupled to the muffle and is configured to create a hot zone within the furnace cavity having a temperature of about 1900 C or greater. An upper muffle extension is positioned above the muffle and defines a handle cavity. A downfeed handle is positioned within the handle cavity such that a gap is defined between an outer surface of the downfeed handle and an inner surface of the upper muffle extension. An upper heater is thermally coupled to the upper muffle extension and configured to heat the gap. A gas screen is positioned in the upper muffle extension and is configured to inject a process gas into the handle cavity.
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subjects CHEMISTRY
GLASS
MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
METALLURGY
MINERAL OR SLAG WOOL
title METHOD AND APPARATUS FOR SUPPRESSING FLOW INSTABILITIES IN AN OPTICAL FIBER DRAW SYSTEM
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