A modular inkjet printhead includes a plurality of printhead modules arranged end on end in a row. Each printhead module includes: a substrate having a plurality of ink supply channels; a plurality of print chips mounted on the substrate, each print chip receiving ink from a respective ink supply channel; and a plurality of fingers extending longitudinally from opposite ends of each printhead module, each finger comprising at least a portion of a respective print chip. The fingers of neighboring printhead modules are interdigitated such that print chips of neighboring printhead modules overlap and the portion of the print chip contained in a respective finger is positioned towards one lateral edge of the finger.

An apparatus configured to discharge liquid includes a plurality of liquid discharge modules arranged at different inclinations in the apparatus. Each of the plurality of liquid discharge modules includes a liquid discharge head, a containing member, and a holding member. The liquid discharge head is configured to discharge liquid. The containing member is configured to contain liquid to be supplied to the liquid discharge head. The holding member is configured to hold the containing member. The holding member of each of the plurality of liquid discharge modules includes a first adjuster configured to adjust a position of the containing member relative to the liquid discharge head in a vertical direction in the apparatus.

Printheads for a jetting apparatus. In one embodiment, a printhead comprises a plurality of jetting channels having nozzles on a bottom surface configured to jet a print fluid, and longitudinal sides disposed between the bottom surface and a top surface. The printhead also comprises Input/Output (I/O) ports disposed on one or more of the longitudinal sides, and configured to convey the print fluid into or out of the printhead. The printhead further includes one or more chain manifolds disposed between the I/O ports.

A liquid ejecting head includes a pressure compartment forming substrate, a piezoelectric actuator, a sealing plate, and a flexible wiring board. A pressure compartment is formed in the pressure compartment forming substrate. The piezoelectric actuator is disposed over the pressure compartment. The sealing plate has an opening going from a first surface, which is farther from the pressure compartment, to a second surface, which is closer to the pressure compartment. The sealing plate is configured to cover the piezoelectric actuator located in a first direction with respect to the opening. The flexible wiring board is inserted in the opening and is electrically coupled to the piezoelectric actuator. A first opening width of the opening at the first surface in the first direction is greater than a second opening width of the opening at the second surface in the first direction.

A liquid discharge head having a nozzle substrate including a nozzle from which a liquid is discharged in a liquid discharge direction, a pressure chamber communicating with the nozzle, a diaphragm defining a part of wall of the pressure chamber, and a pressure generator on a first surface of the diaphragm opposite to a second surface of the diaphragm facing the pressure chamber, the pressure generator configured to deform the diaphragm. A gap between a first line and a second line is 40 μm or less in a direction perpendicular to the liquid discharge direction, where the first line extends, in the liquid discharge direction, from a displacement center at which the diaphragm deforms with a maximum displacement amount, and the second line extends from a central position of the nozzle in the liquid discharge direction.

A liquid ejecting head with a sealing member includes: a liquid ejecting head including a liquid ejecting surface configured to eject ink; a fixing member configured to be attachable to and detachable from the liquid ejecting head; and a sealing member configured to seal the liquid ejecting head and the fixing member. When the liquid ejecting head to which the fixing member is joined is mounted on a cover, the sealing member seals the liquid ejecting head and the cover.

A fluid ejection head for a fluid jet ejection device and a method for improving adhesion between a nozzle plate and a flow feature layer of the ejection head. The fluid ejection head includes a silicon substrate containing at least one array of fluid ejectors deposited thereon. At least one fluid supply via is etched through the silicon substrate adjacent to the at array of fluid ejectors. A flow feature layer is attached to the silicon substrate. The flow feature layer contains at fluid chambers and fluid flow channels corresponding the array of fluid ejectors for ejecting fluid provide fluid from the at least one fluid supply via to fluid chambers. At least a portion of the flow feature layer comprises an attachment surface having improved surface adhesion characteristics, and a nozzle plate containing nozzle holes is laminated to the flow feature layer to provide the fluid ejection head.

A liquid ejecting head unit configured to eject a liquid includes a flow channel member, and a liquid ejecting head configured to eject the liquid supplied from the flow channel member, in which the flow channel member includes a flow channel structure having a supply flow channel through which the liquid supplied from the outside flows, and a supply protrusion that protrudes from the flow channel structure and has a supply port for supplying the liquid from the outside to the supply flow channel, a wall surface of the supply flow channel is made of a resin, and at least a part of the supply protrusion is made of a metal.

There is provided a head bar unit including a head bar, an adjuster and a movement. The head bar includes a plurality of heads. The adjuster is supported by the head bar, and is configured to adjust positions in a vertical direction of the heads. The movement is configured to move the head bar and the adjuster in the vertical direction. The adjuster includes a motor, a rotator and a stopper. The rotator includes a plurality of contact portions. The rotator is configured to be rotated by the motor around a rotating shaft. The stopper is located at a position facing the rotator in the vertical direction, and is configured to position the rotator in the vertical direction, by making contact with one of the contact portions.

There is provided a head assembly including: a rigid substrate; a plurality of heads; a tank; a plurality of tubes; a heater; a plurality of flexible substrates; a relay substrate; a first member; and a second member arranged on one side in a first direction with respect to the first space. The rigid substrate is arranged in a first space formed in the first member. The tank, the heater, the plurality of tubes and the plurality of flexible substrates are arranged in a second space formed in the second member. The relay substrate is located between the first space and the second space in a first direction, and partitions the first space and the second space from each other.