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.

A liquid discharge head includes: a substrate, where a recording element is disposed; and a discharge orifice forming member, where a discharge orifice, facing the recording element, and configured to discharge the liquid, is formed. The liquid discharge head has a pressure chamber, a first liquid channel configured to supply liquid to the pressure chamber, and a second liquid channel configured to recover liquid from the pressure chamber. The substrate has a liquid supply channel connected to the first liquid channel to supply liquid to the first liquid channel, and a liquid recovery channel connected to the second liquid channel, to recover liquid from the second liquid channel. Pressure at an inlet portion of the liquid supply channel is higher than pressure at an outlet portion of the liquid recovery channel, and a flow velocity of liquid within the pressure chamber is 3 to 140 mm/s.

A liquid discharge head includes: a substrate, where a recording element is disposed; and a discharge orifice forming member, where a discharge orifice, facing the recording element, and configured to discharge the liquid, is formed. The liquid discharge head has a pressure chamber, a first liquid channel configured to supply liquid to the pressure chamber, and a second liquid channel configured to recover liquid from the pressure chamber. The substrate has a liquid supply channel connected to the first liquid channel to supply liquid to the first liquid channel, and a liquid recovery channel connected to the second liquid channel, to recover liquid from the second liquid channel. Pressure at an inlet portion of the liquid supply channel is higher than pressure at an outlet portion of the liquid recovery channel, and a flow velocity of liquid within the pressure chamber is 3 to 140 mm/s.

There are provided an inkjet head, an inkjet image forming apparatus, a nozzle plate manufacturing method, and an inkjet head manufacturing method capable of improving durability against wiping on an ink discharge surface. The inkjet head includes a nozzle substrate including nozzle holes from which ink is discharged. The nozzle substrate has an irregularity structure formed on an ink discharge surface such that neither ink particles contained in the ink nor a wiping member that wipes the ink discharge surface get caught by the irregularity structure.

Examples include a fluidic device comprising a fluidic die, a support element, and a conductive member. The support element is coupled to the fluidic die, and the support element has a fluid channel formed therein. The fluid channel exposes at least a portion of a back surface of the fluidic die. The support element further includes a member opening passing therethrough. The conductive member is connected to the fluidic die, and the conductive member is a least partially disposed in the member opening such that a portion of the conductive member is exposed to the fluid channel of the support element.

A substrate laminated body is formed by joining a first substrate for forming a part of a device and a second substrate for forming another part of the device. The first and second substrates are joined by a method comprising: a temporarily joining step of arranging an adhesive agent outside a device forming region and temporarily joining the device forming regions of the first substrate and the second substrate to be held in a non-contact state, and a finally joining step of forming a film so as to fill a gap between the device forming regions in the non-contact state and finally joining the first substrate and the second substrate by way of the film.

A liquid ejecting apparatus includes a first head unit having a first head provided with a plurality of first nozzles and a second head unit having a second head provided with a plurality of second nozzles and a third head provided at a position different from the second head in a first direction and provided with a plurality of third nozzles. The second head and the third head are provided at different positions in a second direction intersecting with the first direction, and the first head unit and the second head unit are disposed such that a width at which the first head and the second head overlap in the first direction is smaller than a width at which the second head and the third head overlap in the first direction.

An object is to provide a liquid ejection apparatus and a method of controlling a liquid ejection apparatus capable of preventing bubbles generated by kogation removal from interfering with the kogation removal. To this end, in a long liquid ejection head with a liquid circulated therethough, a pressure chamber is pressurized and a voltage is applied to a heat applying portion and an electrode to perform kogation removing cleaning.

The present invention provides an elastomeric glue with a good chemical resistance against solvent based inks, and a method for preparing the elastomeric glue. The elastomeric glue is used inside of an inkjet printhead as a hydraulic glue, and capable of tightly bonding the chip to hydraulic part of the reservoir of the cartridge body and the plugs to the reservoir of the inkjet printhead. Accordingly, the inkjet printhead with the elastomeric glue of the present invention is resistant to both traditional solvent based inks and UV curable inks, and is capable of being printed on porous and not porous surfaces.

A member transfer method includes sticking a member supported at a support to an object, thinning the support after the sticking of the member to the object, and removing the support from the member after the thinning of the support.