a carrier 593 the carrier is supported by a displacement mechanism 594 which displaces the rib 592 into abutment with the printhead 516 when the printhead 516 is inoperative conversely when the printhead 516 is operational the displacement mechanism 594 is operable to retract the rib 592 out of abutment with the printhead 516 the printhead sub assembly 508 includes a printhead support molding 596 on which the printhead 516 is mounted the molding 596 together with an insert 599 arranged in the molding 596 defines a passage 598 through which the print media 542 passes when an image is to be printed thereon a groove 700 is defined in the molding 596 through which the capping mechanism 590 projects when the capping mechanism 590 is in its capping position an ink feed arrangement 702 is supported by the insert 599 beneath the cap portion 574 the ink feed arrangement 702 comprises a spine portion 704 and a casing 706 mounted on the spine portion 704 the spine portion 704 and the casing 706 between them define ink feed galleries 708 which are in communication with the ink supply channels 514 in the chassis 510 for feeding ink via passages 710 fig7.