A printhead is provided for an inkjet printer. The printhead includes a wafer assembly defining a plurality of spaced apart groups of ink supply channels. A plurality of groups of ink ejection nozzle arrangements is provided in fluid communication with respective ink supply channel groups. Each group...http://www.google.de/patents/US7278713?utm_source=gb-gplus-sharePatent US7278713 - Inkjet printhead with ink spread restriction walls
