US Patent 7914131 Inkjet printhead assembly having releasably attached printhead modules

An inkjet printhead assembly includes an elongate ink feed structure defining a plurality of longitudinally extending ink supply passages and a plurality of spaced apart sets of ink outlets in fluid communication with respective ink supply passages. A plurality of printhead modules are releasably attached to the ink feed structure. Each printhead module is in fluid communication with a respective set of ink outlets, and each printhead module includes an elongate printhead chip configured to eject ink supplied from the ink feed structure. Each printhead chip is obliquely angled with respect to a longitudinal axis of the ink feed structure. A capping arrangement configured to cap nozzles on each printhead chip.