A large array or pagewidth printhead fabricated from printhead elements or subunits. The printhead subunits are butted together at either adjacent channel elements or adjacent heater elements to form a pagewidth printhead. The butting element, either heater or channel element, is slightly...http://www.google.de/patents/US5755024?utm_source=gb-gplus-sharePatent US5755024 - Printhead element butting
