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The number of hardware elements and adjustments for assembling and mounting a corona unit are minimized by an arrangement of molded blocks with snap-on configurations.
English (United States)
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The number of hardware elements and adjustments for assembling and
mounting a corona unit are minimized by an arrangement of molded blocks with
Corona housing 10 is formed of metal with end block retention slots 11-14.
End blocks 15 and 16 have molded locking lugs, such as 17 and 18, which
receive retention slots, such as 11 and 13, to retain and locate housing 10
relative to blocks 15 and 16. Housing 10 is deflected outwardly so as to allow a
snap-over locking between slots 11-14 and the appropriate lugs on 15 and 16.
End blocks 15 and 16 are molded wqith location pins such as 20,21 (not
visible), 22 and 23. Pins 20-23 are piloted into respective frame plate holes 24-
27. By controlling tolerances of the mounting pins 20-23 and receiving holes 24-
27, the corona assembly, once assembled, requires no adjustment relative to
other machine elements.
Tab 30 on housing 10 retains the corona relative to the machine elements by
means of a mounting screw 31. Tab 30 and screw 31 provide machine frame
plate grounding for the corona unit. End blocks 15 and 16 are hollow such that a
corona wire assembly can be passed through the open channel interior 35 of
block 15 and located in a receiving slot (not shown) in end block 16.
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