Modular printhead assembly with releasable printhead modules

1. A modular printhead assembly comprising:

an elongate chassis;

an elongate ink reservoir assembly mounted on the chassis and defining a plurality of distinct elongate ink supply channels;

a plurality of printhead modules serially arranged along and releasably engaged with the ink reservoir, each printhead module having ink chambers in fluid communication with respective distinct supply channels; and

a plurality of spaced apart sets of tubular filling formations serially arranged along the elongate ink reservoir, each filling formation of a set being in fluid communication with one distinct ink supply channel.

2. A modular printhead assembly as claimed in claim 1 , wherein each set comprises a quartet of filling formations.

3. A modular printhead assembly as claimed in claim 1 , wherein each printhead module comprises a plurality of filling funnels configured to be releasably engaged with a respective set of filling formations.

4. A modular printhead as claimed in claim 3 , wherein a collar is arranged on each filling funnel to facilitate engagement of the funnels and the filling formations.

5. A modular printhead assembly as claimed in claim 1 , further comprising snap-fitting arrangements interposed between the printhead modules and the ink reservoir module to releasably engage the printhead module with the ink reservoir.

6. A modular printhead assembly as claimed in claim 1 , wherein each printhead module comprises a micro-electromechanical integrated circuit bonded by adhesive to a tape automated bond film, the micro-electromechanical integrated circuit also being electrically coupled to the tape automated bond film.

7. A modular printhead assembly as claimed in claim 6 , wherein each printhead module further comprises a micromolding to which the micro-electromechanical integrated circuit and tape automated bond film assembly is operatively attached.