Patent ID: 7631962

Claim:
A droplet ejection module, comprising: a liquid supply assembly including a self-contained liquid reservoir and a liquid outlet; a housing configured to connect to the liquid supply assembly and including a liquid channel configured to receive a liquid from the liquid outlet of the liquid supply assembly and to deliver the liquid to a droplet ejection body; and a droplet ejection body mounted within the housing and including one or more liquid inlets configured to receive the liquid from only the liquid supply assembly directly via the housing and fluidly coupled to one or more nozzles, the droplet ejection body including one or more actuators configured to selectively eject droplets from the one or more nozzles and one or more electrical contacts to receive one or more electrical signals to drive the one or more actuators wherein: the housing is connectable to the liquid supply assembly in a closed first position where the liquid is prevented from exiting the liquid outlet and entering the liquid channel; the housing is connectable to the liquid supply assembly in an open second position where the liquid is not prevented from exiting the liquid outlet and entering the liquid channel; and once the housing is connected to the liquid supply assembly in the closed first position, the housing can only be moved into the open second position and cannot be separated from the liquid supply assembly.