A liquid discharging head is provided with: individual channels; a first common channel; and a second common channel. The individual channels include: first individual channels which have first pressure chambers and which are aligned in a second direction to form a first individual channel array, and second individual channels which have second pressure chambers and which are aligned in the second direction to form a second individual channel array; the first individual channel array and the second individual channel array are arranged in a third direction. The first common channel communicates with both of the first individual channels and the second individual channels; and the first pressure chambers and the second pressure chambers do not overlap with the second common channel in a first direction, and do not overlap with each other in the second direction.

An inkjet ink contains a pigment, a pigment dispersion resin, a water-soluble organic solvent, and a polymer nonionic surfactant. The pigment dispersion resin has an acid value of at least 55 mgKOH/g and no greater than 97 mgKOH/g. The polymer nonionic surfactant has a mass average molecular weight of at least 7,000 and no greater than 12,500. An inkjet recording apparatus includes a linehead and a conveyance section which conveys a recording medium. The linehead ejects the above inkjet ink onto the recording medium.

A liquid discharge head includes a nozzle to discharge a liquid, an individual chamber communicating with the nozzle, a supply channel communicating with the individual chamber to supply the liquid to the individual chamber, and a discharge channel communicating with the individual chamber to discharge the liquid in the individual chamber. A fluid resistance of the supply channel is greater than a fluid resistance of the discharge channel.

A head array includes heads arranged in a longitudinal direction at different positions shifted in a direction orthogonal to the longitudinal direction. Each head includes: pressure chambers communicating with nozzles; common supply channel tributaries communicating with the chambers; a common supply channel mainstream communicating with the common supply channel tributaries; common collection channel tributaries communicating with the chambers; a common collection channel mainstream communicating with the common collection channel tributaries; a supply port at one end of the common supply channel mainstream; and a collection port at one end of the common collection channel mainstream. The supply and collection ports are on a same side of each head in the longitudinal direction. A direction of flow of the liquid in each common supply channel tributary is opposite between the heads. A direction of flow of the liquid in each common collection channel tributary is opposite between the heads.

A flow passage member includes: a supply flow passage through which liquid flows; a filter provided on a path of the supply flow passage, the liquid being configured to pass through the filter; a fixing member which constitutes a part of the supply flow passage and to which the filter is fixed; and a first member which constitutes a part of the supply flow passage and to which the fixing member is fixed; wherein the fixing member is made of thermoplastic resin, and the first member is made of any of thermosetting resin, metal, and ceramic.

The disclosed embodiments relate to a wide format single pass printing apparatus. The printing apparatus can include multiple print housings configured to receive print beams with print heads configured to print onto a substrate. The print housings can be horizontally adjacent to one another relative to a horizontal plane. The print housings can also be oriented opposite to one another. The print beams can be inserted and/or removed from each print housing from opposing ends, allowing for greater ease of access to the print beams.

A liquid discharge head includes a plurality of discharge holes, a plurality of pressurizing units, a plurality of drive circuits, a switch circuit, and first and second control circuits. The drive signals include a first signal for a pixel of a first size and a second drive signal for a pixel of a second size. The second control circuit controls the switch circuit so that each of the plurality of pressurizing units is connected to the drive circuit outputting the first signal when a droplet forming the pixel of the first size is discharged and is connected to the drive circuit outputting the second signal when a droplet forming the pixel of the second size is discharged. The first control circuit controls the drive circuits so that the drive circuits in charge of outputting the first signal is changed among the plurality of drive circuits.

A liquid discharge head 2 of the present disclosure includes: a flow path member 4 having a plurality of pressurizing chambers 10 connected to respective discharge holes 8, a first common flow path 20 commonly connected to the plurality of pressurizing chambers 10, and a second common flow path 22 commonly connected to the plurality of pressurizing chambers 10; and a plurality of pressurizing units 50 that pressurizes the respective pressurizing chambers 10, in which the first common flow path 20 extends in a first direction and is open to an outside of the flow path member 4 at both end portions, and the second common flow path 22 extends in the first direction and is open to the outside of the flow path member 4 at both end portions.

A length of a path between the input section and the third energy generation element in the wiring section is shorter than a length of a path between the input section and the first energy generation element in the wiring section and shorter than a length of a path between the input section and the second energy generation element in the wiring section.

An inkjet printhead includes: a fluid manifold having a base defining a plurality of fluid outlets and printhead chips attached to the base. Each printhead chip receives printing fluid from a set of the fluid outlets. All fluid outlets are flared with a respect to a width dimension of the printhead chips for facilitating removal of air bubbles.