Electric heating – Metal heating – By arc
Reexamination Certificate
2006-04-05
2011-11-22
Paschall, Mark (Department: 3742)
Electric heating
Metal heating
By arc
C219S121360, C219S121570, C156S345470, C361S232000, C250S288000
Reexamination Certificate
active
08063336
ABSTRACT:
Static neutralization of a charged object is provided by applying an alternating voltage having a complex waveform, hereinafter referred to as a “multi-frequency voltage”, to an ionizing electrode in an ionizing cell. When the multi-frequency voltage, measured between the ionizing electrode and a reference electrode available from the ionizing cell, equals or exceeds the corona onset voltage threshold of the ionizing cell, the multi-frequency voltage generates a mix of positively and negatively charged ions, sometimes collectively referred to as a “bipolar ion cloud”. The bipolar ion cloud oscillates between the ionizing electrode and the reference electrode. The multi-frequency voltage also redistributes these ions into separate regions according to their negative or positive ion potential when the multi-frequency voltage creates a polarizing electrical field of sufficient strength. The redistribution of these ions increases the effective range in which available ions may be displaced or directed towards a charged object.
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Gefter Peter
Gehlke Scott
Ion Systems, Inc.
Paschall Mark
Uriarte Stephen R.
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