A liquid discharging method for a liquid discharge head having a plurality of discharge ports and a plurality of liquid flow paths communicated always with each of the discharge ports at one end, each having a bubble generating area, a bubble generating unit, a plurality of liquid supply ports, and a...http://www.google.de/patents/US6497475?utm_source=gb-gplus-sharePatent US6497475 - Liquid discharge method, head, and apparatus which suppress bubble growth at the upstream side
