Abstract: Electrostatic spraying apparatus comprises a rotary spraying head and a multiple electrode arrangement which includes two high voltage electrodes one of which has an uninsulated portion, and a grounded electrode. A paint flow space is defined between the uninsulated portion and the grounded electrode as well as the remainder of the one high voltage electrode and the grounded electrode. The second high voltage electrode is spaced outwardly from the grounded electrode and has an insulating layer both on its outer side and on its side facing the grounded electrode.

Abstract: An electrostatic sprayer for spraying water-based paints has two or more electrodes mounted on an insulating holder and disposed in the path of the spray between the object to be coated and the outlet of the sprayer. The electrodes are at varying distances from the sprayer outlet and are connected to different potentials.

Abstract: An electrostatic spray apparatus wherein a charging chamber is formed as an enlargement in the conduit feed to the spray nozzle. The charging electrode is disposed axially of the conduit with a pointed end located at the exit end of the enlargement and facing upstream of a particle stream flow and opposed to a counterelectrode end located at the inlet side of said enlargement. The counterelectrode may be an obtuse end of an elongated element or may be formed as a grid extending across the conduit or as an annular element formed about a wall of the conduit. Optionally shown are a plurality of enlarged charging chambers, as annular element forming a constricted flow path and a charging electrode second end extending beyond the spray nozzle. Means introduce an air flow into the particle stream at both the nozzle and at the charging chamber.