A one-shot air purge apparatus for an inkjet cartridge for removing air accumulated within the cartridge. The inkjet cartridge comprises a print cartridge base and a replaceable ink receptacle. The replaceable ink receptacle comprises an ink supply coupled to an ink supply seal and a vacuum chamber coupled...http://www.google.com.au/patents/US5984462?utm_source=gb-gplus-sharePatent US5984462 - One shot air purge for replaceable ink supply
