Patent ID: 6511164
Filing Date: 2003-01-28
Classification: B41J

Abstract:
Spraying control system for an electrically conducting liquid emitted in the form of a pressurized jet through at least one nozzle, comprising means for separating the liquid jet into drops, means for electrically charging said drops, means for applying an electrical deflection field to said charged drops, a first and a second monolithic element each with a continuous surface, laid out such that the continuous surfaces are facing each other and define a space between them in which the pressurized jet is emitted through said at least one nozzle, said first and second monolithic elements including conducting means with means of making electrical connections to electrical potentials used to set up continuous potentials on said continuous surfaces to obtain said electrical charge of the drops and said electrical deflection field, and electronic control means for said potentials, wherein the continuous surface of the first monolithic element is conducting and has electrical connection means to one of said potentials, and the continuous surface of the second monolithic element is composed of one face of an insulating support, this face being equipped with conducting tracks with means for making electrical connections at potentials chosen among said potentials, with a resistive coating with a resistance per square mm between 5 M&OHgr; and 100 M&OHgr;, extending continuously over said face, the system further comprising means for checking intensities of electrical currents that can circulate on said continuous surfaces.