Electrostatic spraying device

A cartridge for the storage of a liquid suitable for electrostatic spraying, which cartridge comprises:

• (a) a cartridge body containing a reservoir of an electrostatically sprayable liquid;
• (b) a capillary structure which comprises a hollow tube having a convoluted inner surface and being formed of a polymeric material which is impermeable to the liquid, the capillary structure at one end contacting the reservoir of the liquid and at the other end terminating in an atomization tip, the capillary structure being such that when oriented substantially vertically and with the atomization tip uppermost, the capillary action is sufficient to transport the liquid to the atomization tip;
• and
• (c) means for providing an electrical connection to a high voltage source.

An electrostatic spraying device which comprises

• a cartridge comprising (a) a cartridge body containing a reservoir of an electrostatically spraying liquid, (b) a capillary structure which comprises a hollow tube having a convoluted inner surface and being formed of a polymeric material which is impermeable to the liquid, the capillary structure at one end contacting the reservoir of the liquid and at the other end terminating in an atomization tip, the capillary structure being such that when oriented substantially vertically and with the atomization tip uppermost, the capillary action is sufficient to transport the liquid to the atomisation tip, and (c) means for providing an electrical connection to a high voltage source;
• a housing into which the cartridge is adapted to be removably located with the capillary structure extending in a substantially vertical direction;
• and
• the high voltage source located within the housing for application of an electrostatic potential to the electrical connection on said cartridge.