In one example, a printing fluid delivery system for a printer is described. The printing fluid delivery system includes a plurality of interconnected printing fluid supply modules forming a page-wide printing fluid manifold to supply printing fluid from one or more cartridges to one or more printheads along a print bar in a printer.

In one example, a printing fluid delivery system for a printer is described. The printing fluid delivery system includes a plurality of interconnected printing fluid supply modules forming a page-wide printing fluid manifold to supply printing fluid from one or more cartridges to one or more printheads along a print bar in a printer.

A printing unit includes: a sleeve and a print module received in the sleeve, the print module being slidably removable, in a first direction, from the sleeve. The print module includes a supply module and a replaceable printhead. The printhead is slidably removable, in a second direction, from the supply module, the first and second directions being non-parallel.

A printing unit includes: a sleeve and a print module received in the sleeve, the print module being slidably removable, in a first direction, from the sleeve. The print module includes a supply module and a replaceable printhead. The printhead is slidably removable, in a second direction, from the supply module, the first and second directions being non-parallel.

A printhead module includes: a monolithic substrate having alternate longitudinal slots and longitudinal ink supply channels defined through a thickness of the substrate and extending parallel with each other along a length of the substrate; and a plurality of rows of print chips mounted on a front face of the substrate, each row of print chips receiving ink only from a respective one of the ink supply channels. Each one of the longitudinal slots is configured to supply power and data only to a respective one of the rows of print chips.

A printhead module includes: a monolithic substrate having alternate longitudinal slots and longitudinal ink supply channels defined through a thickness of the substrate and extending parallel with each other along a length of the substrate; and a plurality of rows of print chips mounted on a front face of the substrate, each row of print chips receiving ink only from a respective one of the ink supply channels. Each one of the longitudinal slots is configured to supply power and data only to a respective one of the rows of print chips.

A printing system may comprise a page wide array printhead a capping station, and a number of modular caps comprising a housing to cover a nozzle array of a printhead and a cap coupler coupled to the housing to couple the cap to the nozzle array in which the modular caps are adapted to be coupled to and removed from the nozzle array of the printhead and stored in the capping station.

A liquid ejecting apparatus includes a liquid ejecting unit that ejects a liquid supplied to an internal flow path; a pump that feeds the liquid to the liquid ejecting unit; a discharge route that communicates with the internal flow path; and a closing valve disposed in the discharge route. The closing valve has an object that is biased to close the discharge route, and the object open the discharge route, due to an external force, during feeding of the liquid by the pump.

An ejection surface extends in a first direction as a scanning direction and a second direction orthogonal to the first direction and is externally exposed. A plurality of nozzles opens at the ejection surface. A plurality of partial channels is located inside the ejection surface, and at bottom surfaces on a side of the ejection surface, the nozzles open. The plurality of nozzles is arranged in a direction intersecting with the first direction in plural rows to constitute a plurality of nozzle rows. The number of the nozzles arranged in each row is greater than the number of the plural rows. Between the nozzles in each nozzle row, the nozzles in other nozzle rows appear as seen in the first direction. A position of openings in the bottom surfaces of the partial channels differs across at least some of the nozzles in each nozzle row.

The disclosed embodiments include a printer having a printing area configured to receive distinct mediums, and printer heads arranged relative to the printing area. The printer heads are collectively configured to print independent images onto the distinct mediums. The printer heads include at least one shared printer head configured to simultaneously print portions of the independent images onto each of two adjacent mediums.