Method for manufacturing optical fiber and optical fiber
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United States of America Patent
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Nov 19, 2013
Grant Date -
Nov 10, 2011
app pub date -
Jul 15, 2011
filing date -
Apr 16, 2009
priority date (Note) -
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Abstract
A method for manufacturing an optical fiber in which a flow of a cooling gas within a cooling device is made to be an upward flow and the cooling gas is discharged to outside from an upper end of the cooling device by connecting the cooling device and a coating device in an airtight manner, and closing a flow of the cooling gas which flows toward a coating device within the cooling device using a meniscus of resin within the coating device. A temperature of the cooling gas is increased toward an upper portion of the cooling device from a lower portion of the cooling device by adjusting the flow rate of the cooling gas.
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