A multiple printhead cartridge color thermal ink jet printer having apparatus for measuring the offsets between the multiple printhead cartridges each of which includes a nozzle array of one or more columns of nozzles, each column being parallel to the media axis of the printer. The cartridges are individually...http://www.google.es/patents/US5276467?utm_source=gb-gplus-sharePatente US5276467 - Alignment system for multiple color pen cartridges
Alignment system for multiple color pen cartridges
