Abstract: A printhead assembly includes a base having a pocket formed therein, a substrate having at least one fluid passage formed therethrough received within the pocket of the base, and a printhead die supported by the substrate and communicated with the at least one fluid passage of the substrate.

Abstract: A printhead assembly includes a base having a pocket formed therein, a substrate having at least one fluid passage formed therethrough received within the pocket of the base, and a printhead die supported by the substrate and communicated with the at least one fluid passage of the substrate.

Abstract: A fluid supply system for a printing device is disclosed. The fluid supply system includes an ink reservoir adapting member operatively disposed within an ink cartridge. The adapting member has an open end and an end opposed to the open end. The open end is adapted to have a filter disposed thereon. The opposed end is substantially angularly offset from the open end in a manner sufficient to substantially promote fluid and air migration toward a fluid conduit. A depth between the open end and the opposed end substantially varies along a length between two opposed sides of the adapting member. A predetermined area of the opposed end defines the fluid conduit, and the predetermined area is located at a region where the depth is substantially greatest. Further, the conduit is adapted to release fluid and air from the adapting member.

Abstract: One embodiment of a fluid cartridge includes a fluid chamber including an interior for holding fluid and an exterior in communication with an ambient air pressure, and a pressure regulator aperture extending between the interior and the exterior of the fluid chamber, the pressure regulator aperture including a plurality of curved facets concave with respect to an elongate axis of the aperture.

Abstract: An ink delivery system having at least one off-axis ink supply container and an on-axis printhead assembly. The printhead assembly includes at least one reservoir and a corresponding standpipe separated by a particle filter. At least one tube connects the off-axis ink supply container to the printhead assembly. A first valve is configured to selectively open a flow path between the tube and the reservoir. A second valve is configured to selectively open a flow path between the standpipe and the tube. A method for controlling effects of accumulated air in a printhead assembly. The printhead assembly has at least one ink reservoir and one standpipe separated by a particle filter. The printhead assembly is fluidicly connected to at least one off-axis ink supply container by at least one tube. The method includes drawing air from said printhead assembly through said standpipe into the tube.

Abstract: A method of removing gas from a printhead that includes a plurality of orifices configured to receive ink from a supply conduit through passages extending from the supply conduit to the plurality of orifices. The plurality of orifices are sealed from external the printhead to restrict passage of fluid through the orifices. Ink is moved along the supply conduit and through an outlet of the supply conduit disposed downstream of the passages, with the plurality of orifices sealed, so that ink displaces gas from the supply conduit.

Abstract: A re-circulating fluid delivery system includes an air-fluid separator structure, a fluid plenum in fluid communication with the separator structure, and a free fluid reservoir. A fluid re-circulation path fluidically couples the separator structure, the fluid plenum and the free fluid reservoir. A pump structure re-circulates fluid through the re-circulation path during a pump mode, wherein air bubbles may be separated from re-circulated fluid.