Printing mechanism having wide format printing zone

1. A printing mechanism comprising:

an elongate support structure;

a plurality of ink distribution structures mounted end-to-end on the support structure; and

a plurality of printhead modules mounted on respective ink distribution structures, each printhead module having a printhead integrated circuit mounted on a carrier, each printhead integrated circuit having a plurality of nozzle arrangements incorporating micro-electromechanical actuators for ejecting ink from respective ink chambers;

wherein the printhead integrated circuits are mounted to the support structure via the printhead modules and ink distribution structures so that the nozzle arrangements define a printing zone having a wide format length and a width of about 0.5 mm.

2. A printing mechanism as claimed in claim 1 , wherein the wide format length of the printing zone is at least 914 mm.

3. A printing mechanism as claimed in claim 1 , further comprising:

a plurality of print engine controllers mounted on the support structure, each print engine controller being electrically connected to a number of the printhead integrated circuits and being configured to control operation of the number of the printhead integrated circuits by transmitting data signals thereto; and

busbars mounted on the support structure for transmitting electrical power to the print engine controllers and the printhead integrated circuits.

4. A printing mechanism as claimed in claim 3 , wherein the print engine controllers incorporate a plurality of integrated circuits supported on respective printed circuit boards.

5. A printing mechanism as claimed in claim 4 , wherein each printhead module includes a flexible connector interconnecting the respective printhead integrated circuit to the respective print engine controller.

6. A printing mechanism as claimed in claim 5 , wherein:

the support structure has an elongate chassis, the printed circuit boards being supported on a first side of the chassis and the ink distribution structures being supported on a second side of the chassis;

the busbars are interposed between the printed circuit boards and the first side of the chassis; and

the flexible connectors connect the print engine controllers on the first side of the chassis to the printhead integrated circuits on the second side of the chassis.

7. A printing mechanism as claimed in claim 6 , wherein the support structure further has a channel member mounted on the second side of the chassis, the ink distribution structures mounted in a channel defined by the channel member.

8. A printing mechanism as claimed in claim 7 , wherein each ink distribution structure defines a plurality of ink reservoirs that extend through the ink distribution structure such that ink reservoirs extend a length of the channel member when the ink distribution structures are mounted in the channel.

9. A printing mechanism as claimed in claim 8 , further comprising an ink connection assembly mounted to an endmost ink distribution structure for connecting a plurality of ink conduits in fluid communication with respective ink reservoirs in the endmost ink distribution structure.