Ceramic tube for high-intensity discharge lamp and method of producing the same
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United States of America Patent
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Apr 16, 2013
Grant Date -
May 19, 2011
app pub date -
Nov 12, 2010
filing date -
Nov 13, 2009
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a ceramic tube for a high-intensity discharge lamp, comprising a hollow member and a plug member. The hollow member contains a substantially cylindrical body and a closure for closing one end of the body, and the plug member is inserted into an insertion opening formed at the other end of the body. Before the insertion of the plug member, the insertion opening has a tapered portion with a diameter decreasing in the direction from the open end to the inside at least in an area into which the plug member is inserted. After the insertion of the plug member, an outer wall of the plug member is bonded to an inner wall of the insertion opening.
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