A wiper according to the invention comprises two or more wiper blades arranged one behind the other in close proximity, where the two or more wiper blades are different from one another so as to have slightly different wiping swaths. The resulting wipers greatly increase the allowable alignment tolerance...http://www.google.es/patents/US5500660?utm_source=gb-gplus-sharePatente US5500660 - Wiper for inkjet printhead nozzle member
