A recording head includes a liquid ejecting outlet, a liquid passage communicating with the ejection outlet, and a heat generating resistor for supplying heat to the liquid in a heat acting portion in the liquid to create a bubble in the liquid passage to eject the liquid through the ejection outlet....http://www.google.de/patents/US6022100?utm_source=gb-gplus-sharePatent US6022100 - Liquid jet recording head having internal structure for controlling droplet ejection and ink flow
