Glass base material elongation method
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United States of America Patent
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Aug 18, 2015
Grant Date -
Jan 23, 2014
app pub date -
Jun 20, 2013
filing date -
Jul 18, 2012
priority date (Note) -
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Abstract
Provided is a glass base material elongation method for elongating a glass base material with a large diameter to manufacture a glass rod with a smaller diameter, the method comprising, when elongating a glass base material that has a transparent glass tapered portion at one end of a trunk portion and a glass tapered portion including a non-transparent glass portion at the other end of the trunk portion, prior to the elongation, fusing a hanging dummy to an end of the transparent glass tapered portion, setting the hanging dummy in communication with a feeding mechanism, inserting the glass base material into a heating furnace beginning with the other end, and performing elongation.
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