Patent ID: 8490898
Filing Date: 2013-07-23
Classification: B05B,Y10T

Abstract:
1. An electrostatic spraying device comprising a capillary spray electrode comprising a conductive capillary comprised of a spraying end, a fluid conduit housed within the capillary that leads to the spraying end and a reference electrode, the conductive capillary spray electrode and the reference electrode being connected, in use, across a voltage source in order to establish an electric field between the electrodes that causes fluid passing through the conduit in the conductive capillary spray electrode to be sprayed from the spraying end of the conductive capillary spray electrode, wherein the tip of the conductive capillary spray electrode spraying end has a cross-section along its longitudinal axis that is rounded and has a focus that defines a point at which the electric field is focused on the spraying end, wherein the focus is provided by a projection extended from a front surface of the spraying end in a direction parallel to the longitudinal axis of the capillary spray electrode, the projection tip being rounded with a radius of curvature less than that of the capillary spray electrode.