In multi-nozzle ink jet printing for divisional-printing or color-printing information on a single paper with ink of a same color or of different colors ejected from a plurality of nozzles which are mounted on a carriage, a unique method is provided for the prevention of unregistered printing of an image...http://www.google.de/patents/US4626867?utm_source=gb-gplus-sharePatent US4626867 - Method of preventing unregistered printing in multi-nozzle ink jet printing
