Patent ID: 7187534

Claim:
A corona producing device comprising: a plurality of corona producing elements arranged in an array; the elements being directed at and spaced from a charge retentive surface; the elements further being arranged in the array profile that reduces shielding effects; a power source connected to the at least one plurality of corona producing elements; and supports to which the at least one plurality of corona producing elements are attached; wherein the elements include an array of pins projecting toward the charge retentive surface, pins at edges of the array projecting less than pins toward a center of the array; the array of pins comprises a first line of pins with pins projecting further toward the charge retentive surface in accordance with their proximity to a center of the first line of pins; and bores into which the pins are inserted and in which the pins are held and the depth of pin insertion can be varied to adjust the degree to which the pins project toward the charge retentive surface.