Provided is a liquid ejecting head which includes a head main body which has liquid ejection surface through which liquid is ejected, a flexible wiring substrate which is connected to the head main body, and a flow-path member having flow path through which liquid is supplied to the head main body. The flow-path member has an opening portion through which the substrate is inserted. The substrate extends to the flow-path member, with respect to the head main body. The substrate is inclined in a direction directed toward a first surface side of both surfaces of the substrate. In an area on a second surface side of both surfaces of the substrate, the flow path has a portion extending along the head main body.

An ink jet head recording apparatus comprises an ink jet head that includes a nozzle plate having a plurality of nozzles, a plurality of pressure chambers on an interior side of the nozzle plate and in fluid communication with the plurality of nozzles, an ink supply passage and an ink return passage by which ink is circulated in an out of the pressure chambers, and a coating film formed on an exterior side of the nozzle plate, the coating film having multiple layers in a thickness direction thereof, each layer having liquid repelling regions and lyophilic regions.

A liquid discharge head includes: individual channel rows; a common channel; a supply port via which liquid is supplied to the common channel; and a discharge port via which the liquid is discharged from the common channel. Each of the individual channel rows is formed of individual channels aligned in a first direction, each of the individual channels includes a nozzle, and the individual channel rows are arranged in a second direction crossing the first direction. The common channel extends in the first direction, and extends in the second direction over an entire length of an area in which the individual channel rows are arranged. The common channel overlaps with the individual channel rows in a third direction orthogonal to both of the first and second directions, and communicates with the individual channels constructing each of the individual channel rows.

Inkjet printer for the labeling of goods having a print head having a cylindrically shaped housing. A latching lug, and a circumferentially extending groove are formed on the housing in a rear region thereof, in the vicinity of a rear face of the housing. Further, it has an annular collar having an inner wall adapted to the housing. On the one hand, the housing is capable of being fixed and, on the other hand, it is rotatable and axially movable, relative to the annular collar. The annular collar has a bore hole axially aligned with the groove, and a fixing projection located in the bore hole. Further, it has several latching recesses for the latching lug. When the latching lug is positioned in one of the latching recesses, the bore hole is located radially above the groove.

There is provided a head chip and so on capable of achieving the reduction in power consumption and the improvement in print image quality while suppressing the manufacturing cost of the head chip. The head chip according to an embodiment of the present disclosure includes an actuator plate having a plurality of ejection grooves and a plurality of electrodes, a nozzle plate having a plurality of nozzle holes, and a cover plate having a wall part, a first through hole, and a second through hole. The plurality of nozzle holes includes a plurality of first nozzle holes arranged so as to be shifted toward the first through hole, and a plurality of second nozzle holes arranged so as to be shifted toward the second through hole. In a first ejection groove communicated with the first nozzle hole, a first cross-sectional area of a part communicated with the first through hole is smaller than a second cross-sectional area of a part communicated with the second through hole. Positions of both ends of the electrode along the extending direction of the ejection grooves are each aligned in the plurality of electrodes along a predetermined direction.

A hydrophilic coating material including an alginate compound having a bond with a silane compound is used. The material is produced by reacting a water-soluble alginate compound and a silane compound and then by adding a divalent metal ion to an alginic acid-derived carboxyl group in the reaction product.

A liquid ejecting head unit includes an ejecting surface in which nozzles for ejecting a liquid are formed, and a first and a second circuit substrates for ejecting the liquid from the nozzles, in which a planar shape of the ejecting surface includes a first, a second and a third portions. A center line parallel to a long side of a rectangle of a minimum area surrounding the ejecting surface passes the first portion but not the second and third portions. The second and third portions are arranged adjacently to the first portion interposed therebetween. The first circuit substrate is positioned in the first and second portions. The second circuit substrate is positioned in at least one of the first and third portions.

A liquid discharging apparatus includes: a channel member formed with an individual channel, the individual channel including a nozzle and a pressure chamber; a piezoelectric element arranged in the channel member and facing the pressure chamber, the piezoelectric element being configured to apply pressure to liquid in the individual channel; and a driver configured to apply a driving signal to the piezoelectric element, the driving signal being constructed of a plurality of pulse waveforms, wherein the piezoelectric element is driven in a pull-strike system by one piece of the pulse waveforms such that the pressure chamber is depressurized and then pressurized.

A perforate element (101) for use in a print head for non-contact liquid printing comprises: at least one ejection element (103) including an outlet (103a), configured to eject a bulk flow (F) of printing liquid (L) out of the print head; and a liquid residence element (107), arranged to provide a layer of liquid over the outlet (103a) which extends laterally of the outlet (103a) and through which the bulk flow (F) is ejected.

A high viscosity jetting method includes jetting a liquid by a valvejet printhead through a nozzle in a nozzle plate, wherein a section of a nozzle has a shape including an outer edge with a minimum covering circle, wherein the maximum distance from the outer edge to the centre of the minimum covering circle is greater than the minimum distance from the outer edge to the centre from the minimum covering circle times 1.2, and wherein the jetting viscosity of the liquid is at least 20 mPa.Math.s.