Patent ID: 8840037
Filing Date: 2014-09-23
Classification: B05B,H01J

Abstract:
1. An electrospray apparatus for dispensing a controlled volume of liquid as one or more electrospray pulses, the apparatus comprising: an emitter having a spray area from which liquid can be sprayed, an electric field generator comprising at least two electrodes and a voltage power source connected to the electrodes, for applying an electric field to liquid in, on or adjacent to the emitter, whereby, in use, liquid is drawn to the spray area by electrostatic forces and one or more discrete pulses of electrospray are produced whilst a constant electric field is applied, wherein the amount of liquid in each electrospray pulse is dependant on any one or more of electric field strength, liquid viscosity, liquid conductivity and emitter geometry and independent of the time for which the constant electric field is applied.