A liquid discharge head according to the present invention includes a flow passage member and a plurality of pressurizing sections. The flow passage member includes a plurality of discharge holes, a plurality of pressurizing chambers respectively connected to the plurality of the discharge holes, a plurality of first flow passages respectively connected to the plurality of the pressurizing chambers to supply liquid to the plurality of the pressurizing chambers, a plurality of second flow passages respectively connected to the plurality of the pressurizing chambers to collect the liquid from the plurality of the pressurizing chambers, and a plurality of third flow passages respectively connected to the pressurizing chambers to supply the liquid to the pressurizing chambers. A plurality of the pressurizing sections respectively pressurizes the plurality of the pressurizing chambers.

Provided are a painting robot system that may perform painting well not only on a forward path but also on a backward path, and a painting method. An image processing portion (210) included in a painting robot system (11) creates image data for a forward path in a state of having first strip image data of a strip shape corresponding to nozzles (54A) in a first nozzle column (55A) and second strip image data of a strip shape corresponding to nozzles (54B) in a second nozzle column (55B), the image processing portion (210) creates the second strip image data as image data for a backward path in a state of deviating relative to the first strip image data, and the amount of position deviation is set as the following position: the Pth nozzle (54B) in the second nozzle column (54B) lands first relative to the Pth nozzle (54A) in the first nozzle column (54A) with an adjacent landing position at a distance of multiplying the number (N) by twice of the distance (L1).

A liquid ejecting head includes a first compression chamber row 11A on other side of a sub-manifold 5a, which extends in one direction, in other direction, and a second compression chamber row 11B on one side of the sub-manifold 5a in the other direction. First restricting-portion bodies 6Aa and second restricting-portion bodies 6Ba extend in a direction that crosses the one direction, and are alternately arranged in the one direction. First inlets 6Ab are on the one side of the second outlets 6Bc in the other direction. The first inlets 6Ab have an opening width greater than an opening width of the second outlets 6Bc. Channels of the second restricting portions 6B have a similar configuration.

A printhead module includes a plurality of rows of printhead nozzles, at least some of the rows including at least one displaced row portion, the displacement of the row portion including a component in a direction normal to that of a pagewidth to be printed, wherein the displaced row portions of at least some of the rows are different in length than the displaced row portions of at least some of the other rows.

A liquid discharge head may reduce possibility that pressure from a discharge unit reaches a third channel and a fourth channel. The liquid discharge head includes a plurality of discharge units each including a discharge hole, a pressurization chamber communicating with the discharge hole, a first channel for liquid supply to the pressurization chamber, and a second channel for liquid collection from the pressurization chamber, a pressurizing part configured to pressurize the pressurization chamber, a third channel connected commonly to the first channels of the plurality of discharge units, the third channel for liquid supply to the discharge units, a fourth channel connected commonly to the second channels of the plurality of discharge units, the fourth channel for liquid collection from the discharge units, and a fifth channel connecting the discharge units and having channel resistance larger than channel resistance of the first channel and the second channel.

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 liquid discharge head includes a flow channel member including a first surface and a second surface opposite to the first surface, and a pressing unit on the first surface. The flow channel member includes a first discharge hole and a second discharge hole in the second surface, a first individual flow channel connected to the first discharge hole, a first pressurizing chamber on an upstream side of the first discharge hole in the first individual flow channel, a second individual flow channel connected to the second discharge hole, a second pressurizing chamber on an upstream side of the second discharge hole in the second individual flow channel, and a manifold commonly connected to an upstream side of first individual flow channel and an upstream side of the second individual flow channel. The first individual flow channel and the second individual flow channel have an overlapping portion in plan view.

A liquid discharge head according to an embodiment includes: a flow channel member including a first surface and a second surface located opposite to the first surface, a pressing unit located on the first surface, and a supply member connected to the flow channel member. The flow channel member includes a plurality of discharge holes located in the second surface. The supply member includes, in this order from an upstream side, a first supply flow channel, a first connection flow channel connected to the first supply flow channel, and a reservoir connected to the first connection flow channel, the first connection flow channel being connected to the second surface side of the reservoir.

A liquid ejection head is provided which comprises a channel member and a housing. The channel member comprises a first surface, which includes one or more ejection ports configured to eject liquid from the first channel member, and a second surface different from the first surface. The housing is disposed on the second surface and comprises one or more electric circuits. The second surface of the channel member comprises a first opening located outside of the housing and is configured to receive the liquid supplied to the one or more ejection ports.

A liquid ejection head having a channel member which includes an ejection hole surface and a pressurization chamber surface opposite thereto. An actuator substrate overlaps the pressurization chamber surface. The channel member includes a plurality of ejection holes opening in the ejection hole surface, a plurality of pressurization chambers individually communicating with the plurality of ejection holes and arranged in plan view of the pressurization chamber surface, and a plurality of dummy pressurization chambers positioned outside of the predetermined region in plan view of the pressurization chamber surface. The actuator substrate includes a plurality of pressurization portions that individually pressurize the pressurization chambers, and a plurality of dummy pressurization portions that individually pressurize the dummy pressurization chambers. The dummy pressurization chambers communicate with each other via a plurality of communication paths. A closed space including the plurality of dummy pressurization chambers and the plurality of communication paths is hermetically closed.