An inkjet printing system and method that enables printing to continue after an ink supply has been depleted without damaging the printhead associated with the depleted ink supply. The method detects whether less than a predetermined reserve amount of ink remains in a depleted ink supply and, if so,...http://www.google.de/patents/US6607262?utm_source=gb-gplus-sharePatent US6607262 - Reserving ink for printer servicing purposes
