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The grid for a corona is formed with hexagonal openings to allow maximum open area with closest packing of holes while realizing greater mechanical strength for curve forming than with previous patterns.
English (United States)
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Hexagon Pattern Corona Grid
The grid for a corona is formed with hexagonal openings to allow maximum
open area with closest packing of holes while realizing greater mechanical
strength for curve forming than with previous patterns.
Fig. 1 is a three-bay corona 10 which includes a grid screen 12 attached over
the central bay between attachment ridges 14 and 15. Grid 12 may be stamped
or etched with the hexagonal hole pattern, as best seen in Fig. 2, which permits
maximum strength while allowing relatively easy formation into a curved
configuration. The hole pattern is preferably angled such as at about 15 degrees
relative to side shoulders 20 and 21 to aid in reduction of node buildup.
Shoulder 20 includes an extension nub 22 to facilitate electrical connections
while shoulder 21 includes a series of slots, such as 23, attachment to the corona
housing, as shown in Fig. 2. That is, a flexible outer strip 25 has a series of
extensions 26 to pass through slots 23 into the interior strip 28 via the pronged
slot 29 and thence into a receiving aperture, such as 30, in the frame wall 14 of
corona 10. Edge 20 of grid 12 likewise is retained between snap-in strips but
without inclusion of slots.
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