Glass base material elongating apparatus
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United States of America Patent
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Jul 21, 2015
Grant Date -
Apr 10, 2014
app pub date -
Oct 1, 2013
filing date -
Oct 5, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
In order to provide a glass base material elongating apparatus that can safely elongate a glass base material in an extendable top chamber without damaging a flange, provided is a glass base material elongating apparatus comprising a heating furnace; an extendable top chamber formed of a multilayer cylinder disposed above the heating furnace; a glass base material hanging mechanism that hangs a glass base material into the heating furnace and the extendable top chamber; and a top chamber lifting mechanism. A flange is formed on a top portion of an outermost tube of the multilayer cylinder, and the top chamber lifting mechanism includes a cylinder support member that supports the flange from below and a cylinder lifting member that lifts up the cylinder support member.
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