A liquid discharge head includes a channel unit. The channel unit is formed therein with: a plurality of individual channels aligning in a first direction, a common channel extending in the first direction, a supply hole in communication with the common channel, and a damper chamber provided in a position overlapping with the supply hole in a second direction orthogonal to the first direction. The channel unit includes a first plate having a first surface where a recess is formed to constitute the damper chamber, and a second plate having a second surface attached to the first surface via an adhesive. A protrusion is provided on a bottom of such a first part of the recess as overlaps with the supply hole in the second direction.

A liquid ejection head includes a channel member, a pressurizing part, a cover member, and a sealing member. The channel member includes an ejection hole, a pressurizing chamber, an ejection hole surface, and a pressurizing chamber surface. The pressurizing chamber is connected with the ejection hole. The ejection hole surface is positioned on the ejection hole side. The pressurizing chamber surface is positioned on the pressurizing chamber side. The pressurizing part is positioned in a pressurizing region in the pressurizing chamber surface. The cover member stands on the channel member. The sealing member seals the cover member and the channel member. The channel member includes a groove positioned in the pressurizing chamber surface but outside the pressurizing region. The cover member is positioned in the groove. Further, the sealing member is positioned between a fixing portion in the cover member which is positioned in the groove and the groove.

A liquid ejection head 2 in the present disclosure is provided with a first channel member 4 including a first surface 4-1, a plurality of ejection ports in the first surface, a plurality of pressurizing chambers which are individually communicated with the plurality of ejection ports, and a second surface 4-2 on the opposite side to the first surface 4-1; with a pressurizing member on the second surface 4-2; and with a second channel member 6 including a third surface 6-3, a fourth surface 6-4 on the opposite side to the third surface 6-3, a raised part 6e which protrudes from the fourth surface, and a first through hole 6a in the raised part 6e. The second channel member 6 is provided on a region in the second surface 4-2 of the first channel member 4, in which the pressurizing member is not arranged. When viewed on a plane, an outer circumference 7a of the raised part is located on inner side from an outer circumference 7b of the fourth surface 6-4.

A liquid discharge head is provided which comprises a head body, a casing and a thermal insulator. The head body comprises a surface having one or more holes configured to discharge liquids therethrough. The casing, disposed on the head body, comprises a heat generator configured to generate heat and a heat sink configured to dissipate the heat. The thermal insulator is between the heat sink and the head body.

A liquid jetting apparatus includes a nozzle plate having a nozzle, and a channel unit having a first surface facing and joined with the nozzle plate. The channel unit has a first channel member having the first surface, and a second channel member having a second surface facing and joined with the first channel member. The second channel member is formed with a first pressure chamber, a second pressure chamber, a first opening and a second opening defined by the second surface, a first connecting channel connecting the first pressure chamber and the first opening, and a second connecting channel connecting the second pressure chamber and the second opening. The first channel member is formed with a third connecting channel connecting the first pressure chamber and the second pressure chamber.

A liquid discharge head includes a head body, a driver IC, a housing, a heat dissipation plate, and a pressing member. The head body includes a discharge hole configured to discharge a liquid. The driver IC controls driving of the head body. The housing is located on the head body, and includes an opening at a side surface. The heat dissipation plate is located at the opening of the housing, and is configured to dissipate heat generated by the driver IC. The pressing member presses the driver IC against the heat dissipation plate. In addition, the heat dissipation plate is fixed to the pressing member.

A first channel member of a fluid discharge head includes a plurality of discharge holes, a plurality of pressurization chambers individually linked to the discharge holes, and first and second shared channels linked to the pressurization chambers. The first shared channel opens at a plurality of first openings linked to the pressurization chambers, includes a first connection region that is a range of distribution of the plurality of first openings in the channel direction of the first shared channel. The second shared channel opens at a plurality of second openings linked to the plurality of pressurization chambers. The second shared includes a second connection region that is a range of distribution of the plurality of second openings in the channel direction of the second shared channel. The first channel member further includes a bypass channel linked to the first and second connection regions in parallel with the pressurization chambers.

Provided is an inkjet head including a plurality of ink dischargers, a first common ejection flow path, and a second common ejection flow path. Each of the ink dischargers includes an ink storage, a pressure changer, a nozzle, and a first individual ejection flow path and a second individual ejection flow path that communicate to the ink storage and through which ink is ejected from fee ink storage but not supplied to the nozzle. The first common ejection flow path communicates to a plurality of first individual ejection flow paths of the respective plurality of the ink dischargers, and the second common ejection flow path communicates to a plurality of second individual ejection flow paths of the respective plurality of fee ink dischargers. A shape of a first section of first common ejection flow path into which ink flows from the plurality of first individual ejection flow paths is different from a shape of a second section of the second common ejection flow path into which ink flows from the plurality of second individual election flow paths.

Provided are an ink-jet type vehicle coating machine and an ink-jet type vehicle coating method that enable formation of a uniform coating film thickness at a coating portion including an end of a vehicle. In a state where a longitudinal direction of a nozzle head 53 is orthogonal to a scanning direction, a first nozzle array 55A and a second nozzle array 55B are disposed such that droplets discharged from nozzles 54 of the second nozzle array 55B are discharged to intermediate portions between droplets discharged from nozzles 54 adjacent to each other in the first nozzle array 55A. In addition, on the basis of trajectory data for moving the nozzle head 53, attitude data for keeping the longitudinal direction of the nozzle head 53 perpendicular to a main scanning direction of the nozzle head 53 is formed. An arm control unit 110 controls a robot arm on the basis of the trajectory data and attitude data such that, in a state where the nozzle head 53 performs coating while moving in the main scanning direction, the longitudinal direction of the nozzle head 53 is kept perpendicular to the main scanning direction.

A liquid discharge head includes: a supply manifold; a feedback manifold; and a plurality of individual flow channels. Each of the individual flow channels includes: a supply portion, a descender portion, and a feedback portion. The supply manifold has a plurality of supply ports, and the feedback manifold has a plurality of feedback ports. A distance between the center of the supply manifold in one direction and the plurality of supply ports of the supply manifold is longer than ¼ of a width of the supply manifold in the one direction, and a distance in the one direction between the center of the feedback manifold in the one direction and the plurality of feedback ports of the feedback manifold is shorter than ¼ of a width of the feedback manifold in the one direction.