AC corona charger with buried floor electrode

Year	Description
1998	Invention patented by John W. May, Martin J. Pernesky, and George R. Walgrove on September 29th, 1998. Abstract: A corona charger and method and apparatus for corona charging features an insulative shield and an electrically biased grid electrode spaced from the shield. One or more substantially bare corona wires are located between the grid electrode and the shield. The corona wires are electrically biased with an AC voltage. An electrically biased highly conductive buried floor electrode forms a part of the charger and has a surface located between the one or more corona wires and the shield. An insulating layer is located between the corona wires and the surface of the buried floor electrode so that there is no exposure of the buried floor electrode in a direct line of sight from a corona wire.
Source: selected by the editor from original sources.

Invention: AC corona charger with buried floor electrode