Patent ID: 8215751

Claim:
An inkjet printer comprising: (a) a carriage that receives a print cartridge, the carriage comprising: (i) a holding receptacle having a wall, wherein the holding receptacle is configured to receive the print cartridge; and (ii) a spring disposed on the wall of the holding receptacle to provide a biasing force in a direction that pushes the print cartridge away from the wall of the holding receptacle and which biasing force must be manually overcome in order to properly install the print cartridge in the holding receptacle of the carriage; (b) an electrical connector for making electrical connection with an electrical contact of the print cartridge; (c) a controller electrically connected to the electrical connector; and (d) a microswitch including an open position and a closed position, wherein when the print cartridge is properly installed in the holding receptacle of the carriage, the microswitch is in its closed position, and wherein when the print cartridge is not properly installed in the holding receptacle of the carriage, the microswitch is in its open position.