Ink cartridge for liquid electrographic imaging devices

A removable ink cartridge in a liquid replenishment system adapted to engage with a cartridge interface assembly in an ink cartridge bay on an electrographic imaging device, the removable ink cartridge comprising:

• an outer shell comprising a compartment containing a liquid ink, the outer shell having an asymmetrical cross section configured to engage with a corresponding structure in the ink cartridge bay;
• at least one valve fluidly coupled to the compartment, the at least one valve being adapted to engage with a corresponding valve at the cartridge interface assembly;
• a plurality of key slots located on the removable ink cartridge for receiving one or more key tabs that identify the ink cartridge, the key tabs being positioned to engage with a corresponding detector in the ink cartridge bay;
• an impeller located within the first compartment adapted to magnetically couple with an actuator in the cartridge interface assembly;
• and
• a valve access door extending across the valve in a closed position, the valve access door being rotatable to an open position in response to engagement of the ink cartridge with the cartridge interface assembly.