Corona charging of plastic and apparatus therefor
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United States of America Patent
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Sep 24, 1991
Grant Date -
N/A
app pub date -
Apr 18, 1990
filing date -
Apr 18, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A corona charging method and apparatus is disclosed for charging discrete and relatively isolated three-dimensional surfaces of various compositions having a generally exposed surface from which the three dimensional surface extends. The applied charge serves to significantly enhance the wetting and bonding properties of the respective surfaces and is conducted with a relatively concentrated corona emission from discharge electrodes connected to a high voltage source and directed toward the three dimensional surfaces overlying an air gap. The exposed and more accessible surfaces can be treated concomitantly with a field effect diffusion of corona from additional electrodes directed generally toward the exposed surfaces of the composition.
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