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US 4,208,200 AGranted
Filament coating system
AssigneeCorning Glass Works
InventorsStewart A. Claypoole, Merrill Lynn, Roger A. Miller
Life of this patent
Estimating the term…
Abstract
Disclosed is an optical waveguide coating system having means for cooling the hot filament prior to the time that the filament enters the coating apparatus. The cooling means comprises an elongated container through which the filament passes. A coolant jacket, which surrounds the container, lowers the temperature of the filament cooling liquid in the container.
Claims6
Apparatus for coating a glass optical waveguide filament drawn from a region of molten material comprising
- coating means for applying a layer of protective coating material to said filament, and
- filament cooling means disposed between said molten material and said coating means for reducing the temperature of said filament to a value that is not detrimental to said protective coating material, said cooling means comprising a reservoir through which said filament passes, said reservoir containing a coolant liquid having a high heat of vaporization, the portion of said reservoir from which said filament exits having wiping die means for preventing said liquid from flowing therefrom and for wiping excess liquid from said filament.
Dependencies are inferred from the claim text.