Powder charging apparatus 

Patent No. 6,482,253

Issued: November 19, 2002
Filed: September 28, 2000

Inventor: Dunn; John P. (147 W. Gray St., Apt. 508, Elmira, NY 14901)

This invention relates to an apparatus and method to electrostatically charge or neutralize particles conveyed in a pneumatic stream. More particularly the invention is drawn to an apparatus that has at least two longitudinal chambers separated from each other with a plate electrode. Within each chamber is at least one corona charging electrode with multiple discharge points and at least one power level zone. The apparatus divides a single gas stream into multiple streams where corona discharge polarizes or neutralizes particles with a similar or dissimilar polarity causing coalescing or separation of the particles as they exit the charging chambers.

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