Patent ID: 8915571

Claim:
A colour ink printing system, comprising: a plurality of print head cartridges, each extending across a direction of print media propagation and spaced apart along the direction of print media propagation, each print head cartridge including a pagewidth printhead; a print head chassis defining a plurality of slots for removably receiving the plurality of print head cartridges, the print head chassis being actuable between a printing position, a transition position, and a maintenance position; and a maintenance chassis for supporting a plurality of maintenance cradles, the maintenance chassis being actuable between a storage position and an operational position, wherein: each of the plurality of print head cartridges is held stationary with respect to a platen on which print media is propagated to effect printing on the print media; the print head chassis includes a plurality of rows of ventilation slits, each row of ventilation slits being positioned adjacent a first side of a respective slot and extending a length of each print head cartridge, each ventilation slit having applied thereto a suction force for sucking ink aerosol particles away from a respective pagewidth printhead; and the print head chassis includes a plurality of rows of electrical contacts, each row of electrical contacts being positioned at a second side of each slot for engagement with a complementary row of electrical contacts on a respective print head cartridge, the second side being opposite the first side.