Ejection apparatus for printhead

摘要

An ejection apparatus for ejecting material from a liquid at a plurality of ejection locations ( 4 ) disposed in a row, has a plurality of channels ( 11 ) through each of which liquid flows in use to or from a respective ejection location at an open end of the channel. An ejection electrode ( 7 ) is disposed at each ejection location by means of which an electric field is created in use to cause the ejection of material from the liquid. An electrically conductive path ( 12 ) exists to each ejection electrode for supplying a voltage to the ejection electrode ( 7 ) in use. The channels ( 11 ) are isolated from one another and the electrically conductive paths ( 12 ) are separated from the channels over substantially the whole of their length.