Funnel for cathode ray tube
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United States of America Patent
Stats
-
Nov 25, 2003
Grant Date -
Nov 21, 2002
app pub date -
Apr 17, 2002
filing date -
Apr 17, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
On an inner wall of a side wall portion of a funnel, a pair of protrusions are integrally formed as glass buildups at positions separated by a predetermined distance from an anode button toward a side of a neck tube. The pair of the protrusions are formed symmetrically on both sides of a virtual baseline extending to an seal edge surface and the neck tube through the center of the anode button. The virtual baseline is an intersection between a virtual plane including a tube axis and the inner wall, and passes through approximately the center of the seal edge surface in the lengthwise side.
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