A printhead for an inkjet printer. The printhead comprising a wafer assembly defining a plurality of ink supply channels; and plural groups of ink ejection nozzle arrangements extending from the wafer assembly, each group of ink ejection nozzle arrangements sharing a common ink supply channel. Each group...http://www.google.de/patents/US7874644?utm_source=gb-gplus-sharePatent US7874644 - Inkjet printhead with shared ink spread restriction walls
