A method of determining a characteristic of a printing cartridge includes the step of actuating a number of capacitive sensors within an array of such sensors with an actuating formation positioned on the printing cartridge. The actuating formation represents data relating to a characteristic of the...http://www.google.fr/patents/US7055927?utm_source=gb-gplus-shareBrevet US7055927 - Method of identifying printing cartridge characteristics with capacitive sensors
Method of identifying printing cartridge characteristics with capacitive sensors
