GLASS TUBE
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United States of America Patent
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Issued Date -
Aug 14, 2014
app pub date -
Jun 28, 2012
filing date -
Jul 1, 2011
priority date (Note) -
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Abstract
Two conventional thick-walled, drawn, fused quartz tubes 1,2 are arranged the one within the other. At their forward end of them, each is gripped in a collet 3,4. These forward collets are supported for travel along a track 5 by a distance equivalent to the length of the tubes. A heating, and drawing, station 6 is arranged a short distance back in the length of the tubes from an initial position of the forward chucks. At its furthest end, the outer tube is gripped by a tensioning collet 8, itself supported on the track. The collets are arranged to be driven along the track by respective stepper motors 9,10,11.
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