Printing mechanism having elongate modular structure

A printing mechanism comprising:

• an elongate support structure;
• a plurality of ink distribution structures mounted on the support structure;
• 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;
• a plurality of flexible connectors each connected to a respective printhead integrated circuit;
• a plurality of print engine controllers mounted on the support structure, each print engine controller being configured to control operation of a number of the printhead integrated circuits by transmitting data signals thereto via the flexible connectors;
• and
• busbars mounted on the support structure for transmitting electrical power to the print engine controllers and the printhead integrated circuits.