Cathode ray tube and method for punched electrode profile with predetermined angular range
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United States of America Patent
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Apr 1, 2003
Grant Date -
N/A
app pub date -
Oct 20, 2000
filing date -
Oct 22, 1999
priority date (Note) -
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Abstract
The profile lines of plate-like grid electrodes are formed by a first punching step and separation lines of the plate-like grid electrodes are formed by a subsequent punching step. The angle of a crossing portion formed by the profile line and the separation line is set to not less than 70 degrees and not more than 110 degrees. Due to such a constitution, burrs on the plate-like grid electrode which constitutes an electron gun of a color cathode ray tube can be reduced so that the quality of the cathode ray tube can be enhanced and the manufacturing time of the cathode ray tube can be shortened.
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