An ink jet printhead with an array of nozzles unit cells 1. Each of the unit cells having one or more heaters 10 configured to form a gas bubble 12 in ejectable liquid held in the nozzle chamber. The generation of the bubble 12 causes the ejection of a drop 16 of an ejectable liquid (such as ink) through...http://www.google.de/patents/US7841704?utm_source=gb-gplus-sharePatent US7841704 - Inkjet printhead with small nozzle spacing
