Method for the manufacture of hollow fused quartz or fused silica ingots
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United States of America Patent
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Jul 15, 1980
Issued Date -
N/A
app pub date -
Feb 16, 1979
filing date -
Feb 16, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The method of manufacturing an ingot includes the steps of rotating a housing having an inner surface which defines an opening therethrough, the housing containing a layer of insulating material between the housing outer surface and the inner surface, depositing particulate material across the inner surface, and heating the particulate material above its melting point, the rotational movement of the housing holding the molten particulate material by centrifugal force on the inner surface for forming an ingot. The particulate material is deposited on the housing inner surface by gravity from an elongated, slotted tube, by rotating the tube until the slot faces downward.
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