Stackable aperture masks
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United States of America Patent
Stats
-
Jan 17, 1995
Grant Date -
N/A
app pub date -
Sep 21, 1992
filing date -
Sep 21, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A shadow mask for use in forming a television tube having a plurality of openings therein with the mask grade side having an average centerline roughness R.sub.ag, which is less than cone side average centerline roughness R.sub.ac so that when a plurality of aperture masks are stacked with the grade side of one mask in contact with the cone side of an adjacent mask, the greater roughness of the cone side provides sufficient spacing between the shadow masks to allow gasses to enter between the stacked masks to permit batch annealing of the stack of masks without having the stacked masks adhere to one another during the annealing process.
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Cited Art Landscape
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