Abstract: A printhead assembly including one or more nozzles is described that can include a droplet ejection module. In one embodiment, the droplet ejection module includes a liquid supply assembly, a housing and a droplet ejection body. The liquid supply assembly includes a self-contained liquid reservoir and a liquid outlet. The housing is configured to permanently connect to the liquid supply assembly and includes a liquid channel configured to receive a liquid from the liquid outlet of the liquid supply assembly and to deliver the liquid to a droplet ejection body. The droplet ejection body is permanently connected to the housing and includes one or more liquid inlets configured to receive liquid from the housing and one or more nozzles configured to selectively eject droplets.

Abstract: A mounting assembly is described for mounting and housing printhead modules. The mounting assembly includes a lower plate, an upper plate and multiple mounting blocks. The lower plate can include openings configured to expose a surface of a printhead module housed within the mounting assembly, the surface including multiple ink nozzle openings. Each opening can include alignment datums to align the printhead module in a first direction and in a second direction. The upper plate is approximately parallel to the lower plate, and can include multiple openings configured to provide access to ink channels formed in printhead modules housed within the mounting assembly. The mounting blocks are positioned between and affixed to the lower and upper plates, and are configured to couple to a printhead module. Each mounting block can include a datum to align the printhead module in a third direction.

Abstract: Systems and techniques are described relating to a filter assembly. In one embodiment, an ink filter assembly includes an inlet channel configured to direct a flow of ink toward an elongated chamber, and an outlet channel configured to direct the flow of ink from an elongated chamber to an ink nozzle assembly. An elongated chamber extends from the inlet channel to the outlet channel, and a membrane provides a permeable separator between an upper section of the elongated chamber and a lower section of the elongated chamber. The membrane is orientated approximately parallel to a longitudinal axis of the elongated chamber and the flow of ink passes through the membrane.

Abstract: A flexible circuit for use within a printhead assembly and to connect a printhead body to an external circuit includes a substantially planar portion having one or more layers of conductive material and having a top surface substantially parallel to a top surface of the printhead body. One or more integrated circuits can be mounted onto the planar portion. Multiple leads extend from each integrated circuit, the leads electrically connected to the printhead body. One or more arms are attached to, and substantially perpendicular to, the planar portion, each arm including one or more external connectors configured to connect to the external circuit.