Patent ID: 6038120
Filing Date: 2000-03-14
Classification: G03G,H01T

Abstract:
A corona charger comprising:an insulative shield;an electrically biased grid electrode spaced from the shield;one or more substantially bare corona wires located between the grid electrode and the shield, the one or more corona wires being electrically biased with an AC voltage;an electrically biased highly conductive buried floor electrode having a surface located between the one or more corona wires and the shield; andan insulating layer between the one or more corona wires and the surface of the buried floor electrode that provides no exposure of the buried floor electrode in a direct line of sight from a corona wire, and wherein the insulating layer is at least 0.05 mm in thickness (h.sub.1) and has a resistivity of greater than 10.sup.10 ohm-cm and has a surface that directly faces the one or more corona wires without presence of a conductive member between the insulating layer surface and the one or more corona wires.