A liquid recording apparatus ejects droplets of liquid onto a recording medium. The apparatus has multiple liquid emitters whose emissions are activated by multiple power pulses. The power pulses are controlled to maximize the number of emitters which can be simultaneously energized while keeping the...http://www.google.de/patents/US5917509?utm_source=gb-gplus-sharePatent US5917509 - Method and apparatus for interleaving pulses in a liquid recorder
