Dispenser unit for refilling printing unit

1. A dispenser unit for dispensing ink to refill a supply of printing fluid in a printing unit, the dispenser unit comprising:

a body assembly;

a plurality of ink outlets provided on a bottom side of the body assembly, the plurality of ink outlets each for engaging with respective ink inlets of the printing unit;

a compressible ink storage volume provided within the body assembly, the compressible ink storage volume having a sealed end and an outlet end connected to no more than one of the plurality of ink outlets;

a plunger provided within the body assembly and abutting the sealed end of the compressible ink storage volume; and

a compressing actuator for compressing the plunger against the sealed end of the compressible ink storage volume, thereby facilitating a dispensing of ink from within the compressible ink storage volume into the printing unit via the ink outlet to which the outlet end of the compressible ink storage volume is connected.

2. A dispenser unit as claimed in claim 1 , wherein the compressing actuator is a gear and thread arrangement.

3. A dispenser unit as claimed in claim 2 , wherein the gear and thread arrangement comprises a helical geared thread provided about a circumference of a substantially circular plunger, and an elongate drive gear engaged with the helical geared threads.

4. A dispenser unit as claimed in claim 1 , wherein the ink outlet to which the outlet end of the compressible ink storage volume is connected is dependent on a type of ink stored within the compressible ink storage volume.

5. A dispenser unit as claimed in claim 1 , wherein the plurality of ink outlets apart from the ink outlet to which the outlet end of the compressible ink storage volume is connected are non-operational.

6. A dispenser unit as claimed in claim 1 , further comprising a sensor for sensing a position of the plunger.