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US 4,030,901 AGranted
Method for drawing fibers
AssigneeBell Telephone Laboratories, Incorporated
InventorPeter Kaiser
Life of this patent
Estimating the term…
Abstract
A method for drawing silica fibers utilizing an electrical resistance furnace includes the steps of heating a preform so that it begins to flow forming a fiber; pulling the fiber from the furnace; and flushing the preform and the fiber within the furnace with counteracting inert gas flows, the gas flows protecting the preform and the fiber from contamination. Apparatus used with the above-described method is also disclosed.
Claims1
A method for drawing fibers comprising the steps:
- heating a preform in a furnace so that the preform begins to flow forming a fiber,
- pulling the fiber from the furnace, and
- flushing the preform, the fiber and a heater within a chamber located in the furnace with counteracting inert gas flows, by injecting the gas from ports located at opposite ends of the furnace into the chamber and exhausting the gas from the chamber through a port located near the heater within the chamber, the gas flows protecting the preform and the fiber from contamination.
Dependencies are inferred from the claim text.