In one example, a process to control condensation in an inkjet web printer includes injecting hot, dry air into the print zone. In another example, a shroud assembly includes a shroud spanning a full width of the print zone and having openings therein through which printheads are exposed during printing and an air injector attached to or integral with the shroud. The air injector spans a full width of the print zone upstream from all of the openings in the shroud. The air injector is configured to discharge air down and downstream with respect to a print media moving through the print zone during printing.

A holder assembly that holds a head module including an inkjet head on a mounting table, the holder assembly including a pressure member and an operation member. The pressure member presses a portion of the head module adjacent to the mounting table. The operation member transitions the pressure member from a first state to a second state when work of mounting the head module on the mounting table is performed. In the first state, the pressing by the pressure member is deactivated, and in the second state, the pressing by the pressure member is activated. The operation member exists outside an enveloping surface of the head module during the work of mounting the head module on the mounting table.

A liquid ejecting head configured to eject a liquid in a first direction includes an upper surface facing a direction opposite to the first direction, and a gripping portion provided on the upper surface to grip the liquid ejecting head.

A liquid ejection head comprises: a first print element substrate having an ejection port for ejecting a liquid; a support member supporting the first print element substrate; and an adhesive agent provided for adhering the first print element substrate to the support member, wherein the first print element substrate includes a supply port opposed to the support member and communicating with the ejection port, a first surface opposed to the support member and surrounding the supply port, and a second surface opposed to the support member and provided along at least a part of an outer edge of the first surface and retracted from the first surface relative to the support member, and the adhesive agent is filled in a first space between the first surface and the support member, and at least a part of a second space between the second surface and the support member.

Provided are a load distribution apparatus capable of efficiently distributing loads for a plurality of inkjet head modules and a substrate treatment system including the same. The load distribution apparatus includes a second support formed to be elongated in one direction and having both side portions higher than a central portion and in which a head module for discharging droplets onto a substrate is installed in the central portion, a first support supporting the second support on at least one side and supporting the second support below the second support, a first support unit supporting the second support on at least one side and supporting the second support above the second support, and a plate installed above the first support unit and connected to the first support unit, wherein a load of the head module is distributed by the first support and the first support unit.

A cleaning method of a liquid ejection head where recording element substrates having an ejection orifice forming-face having ejection orifice arrays which are aligned, and at least one array ejects a different recording liquid than another, includes wiping and preliminary ejection. In the wiping, a wiping member is caused to move along and wipe the arrays. In the preliminary ejection, before the wiping of the entire ejection orifice forming-face is completed, preliminary ejection from the wiped ejection orifices is started. The wiping and preliminary ejection are sequentially performed from a recording element substrate at one end to a recording element substrate at the other end.

There is provided liquid discharging head including; channel member which includes plates stacked in a first direction and adhered to each other via adhesive, and in which individual channels each including nozzle and pressure chamber communicated with the nozzle is formed. The plates include first plate and second plate adhered to adhesion surface of the first plate via the adhesive. Hollows each construct one of the individual channels are opened in the adhesion surface. The hollows are arranged side by side in second direction orthogonal to the first direction in the adhesion surface, and three or more grooves are formed in the adhesion surface between two of the hollows adjacent to each other in the second direction, each of the three or more grooves extending in third direction which is orthogonal to the first direction and which crosses the second direction.

In some examples, a fluid dispensing device component includes a plurality of fluidic dies each comprising a memory, a plurality of control inputs to provide respective control information to respective fluidic dies of the plurality of fluidic dies, and a data bus connected to the plurality of fluidic dies, the data bus to provide data of the memories of the plurality of fluidic dies to an output of the fluid dispensing device component.

There is provided a piezoelectric actuator, including: a vibration plate; a first piezoelectric body; a second piezoelectric body; a first electrode disposed on a first surface of the first piezoelectric body; a second electrode disposed on a second surface of the second piezoelectric body; an intermediate electrode disposed on an intermediate surface of the first piezoelectric body and overlapping with the first and second electrodes; an intermediate trace connected to the intermediate electrode on the intermediate surface and drawn out to one side in a first direction beyond the first piezoelectric body and the second piezoelectric body; a first trace overlapping with the intermediate trace in the thickness direction and being conducted with the intermediate trace; and a second trace overlapping with the intermediate trace in the thickness direction and being conducted with the intermediate trace.

A liquid ejecting head includes: a plurality of head chips having nozzles; a holder holding the plurality of head chips; and a planar heater disposed on the holder and heating the holder, in which the heater includes an outer peripheral region along an outer edge of the holder and a middle region positioned inside the outer peripheral region in a plan view, and a heat generation amount per unit time of the outer peripheral region is larger than a heat generation amount per unit time of the middle region.