Single faults in shift registers incorporated on monolithic printing heads can render inoperable large numbers of printing actuators, as data will either be stuck high or stuck low for subsequent shift register and actuator stages. This can reduce the effectiveness of other means of fault tolerance,...http://www.google.fr/patents/US5815179?utm_source=gb-gplus-shareBrevet US5815179 - Block fault tolerance in integrated printing heads
Block fault tolerance in integrated printing heads
