Optical fiber graphite furnace featuring an automatic shutter do

Details Optical fiber graphite furnace featuring an automatic shutter do Optical fiber graphite furnace featuring an automatic shutter do

1998-07-07

1999-11-02

Vincent, Sean

Glass manufacturing

Fiber making apparatus

With measuring, controlling, sensing, timing, inspecting,...

65379, C03B 3707

Patent

active

059748389

ABSTRACT:
An optical fiber furnace having an access port for a preform is disclosed. The access port includes a gas pressure generation and sensing device and an automatic shutter door assembly. The gas pressure generation and sensing device responds to a sensed gas pressure built up around a new preform being inserted into the optical fiber furnace, for providing an automatic shutter door opening signal. The gas pressure generation and sensing device also responds to a sensed outwardly flowing purge gas pressure escaping around an exhausted preform being removed from the optical fiber furnace, for providing an automatic shutter door closing signal. The automatic shutter door assembly responds to the automatic shutter door opening signal, for opening the automatic shutter door assembly for inserting the new preform into the optical fiber furnace. The automatic shutter door assembly also responds to the automatic shutter door closing signal, for closing the automatic shutter door assembly after removing the exhausted preform from the optical fiber furnace.

REFERENCES:
patent: 3373007 (1968-03-01), Ticknor
patent: 4813989 (1989-03-01), Uchiyama
patent: 5032079 (1991-07-01), Tsuchiya et al.
patent: 5228893 (1993-07-01), Smithgall et al.
patent: 5470369 (1995-11-01), Tsuchiya et al.

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