Abstract: A corona discharge device including a pair of electrically conductive electrodes arranged in spaced electrically insulated relationship with one of the electrodes comprised of a plurality of juxtaposed conductive members supported for individual longitudinal movement toward and away from the other electrode. Each individual conductive member can be identical to each other conductive member and can be provided with longitudinally offset end portions facing the other electrode, with the juxtaposed conductive members having alternating directions for the offset end portions and with the lower end of each end portion enclosed by an insulator.

Abstract: A corona discharge device includes a roll formed of a conductive material and a plurality of segments mounted on a support and arranged in spaced relation from the surface of the roll in an alignment generally parallel to the roll's rotational axis. Each segment includes a hollow insulator having an outer surface adapted to be disposed adjacent to said roll and a wall extending away therefrom. The conductive body is disposed within said insulator and in an opposed relation to said outer surface. The conductive means is coupled to the conductive body and extends outwardly from said insulator for being coupled to said support means for movement of said segment away from said roll. An insulating material can be used to fill the remaining portion of said insulator and to surround said conductive means.