Tonejet Limited

Simon Roger Johnson

Andrew John Clippingdale

Guy Charles Fernley Newcombe

Daniel Richard Mace

A drop-on-demand printer having a row of ink ejection locations ( ) for ejecting plural ink droplets, each ejection location ( ) having an associated ejection electrode ( ) to which a voltage is applied for causing electrostatic ejection of the droplets from the respective ejection location ( ); a guard channel ( ) disposed between adjacent ejection locations ( ), each guard channel ( ) having an electrode ( ) disposed therein; and control means for applying a voltage to said guard channel electrodes ( ), said applied voltage being the average of the voltages applied in operation over a given time to the adjacent ejection location electrodes.

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Middlesex, United Kingdom

Simon Roger Johnson