Patent ID: 7626602

Claim:
An electrostatic coating apparatus comprising: an enclosure for holding a mixture of gas and suspended particles comprising a first opening for discharging a first stream of the mixture of gas and suspended particles onto a medium and a second opening disposed adjacent to the first opening for discharging a second stream of the mixture of gas and suspended particles onto the medium; a first electrode forming a first electrostatic field thereabout, the first electrode disposed adjacent to the first stream such that the first electrostatic field imparts a charge to the first stream and the second stream; and a second electrode forming a second electrostatic field thereabout, the second electrode disposed adjacent to the second stream such that the second electrostatic field imparts a charge to the second stream and the first stream, wherein the enclosure further comprises a first gas-releasing device to further release the first stream of suspended particles onto the medium, and a second gas-releasing device to further release the second stream of suspended particles onto the medium, and wherein the first and the second gas-releasing devices are air knives with a slitted nozzle for creating a uniform sheet of air across the length of the slitted nozzle; and wherein the first opening and the second opening are of variable size and the gas-released devices are on a movable rack with a handle for the opening variation of the first opening and the second opening.