A liquid ejecting head includes a nozzle formation surface disposed between a first roller and a second roller in a medium transport direction, a first positioning portion used for positioning with respect to a first head holding member provided in a first liquid ejecting apparatus in which a distance between the first roller and the second roller in the medium transport direction is set to a first distance, and a second positioning portion used for positioning with respect to a second head holding member provided in a second liquid ejecting apparatus in which the distance between the first roller and the second roller in the medium transport direction is set to a second distance being different than the first distance.

A liquid ejecting head includes a nozzle formation surface disposed between a first roller and a second roller in a medium transport direction, a first positioning portion used for positioning with respect to a first head holding member provided in a first liquid ejecting apparatus in which a distance between the first roller and the second roller in the medium transport direction is set to a first distance, and a second positioning portion used for positioning with respect to a second head holding member provided in a second liquid ejecting apparatus in which the distance between the first roller and the second roller in the medium transport direction is set to a second distance being different than the first distance.

A fluid ejection apparatus includes a plurality of fluid ejectors. Each fluid ejector includes a pumping chamber, and an actuator configured to cause fluid to be ejected from the pumping chamber. The fluid ejection apparatus includes a feed channel fluidically connected to each pumping chamber; and at least one compliant structure formed in a surface of the feed channel. The at least one compliant structure has a lower compliance than the surface of the feed channel.

A fluid ejection apparatus includes a plurality of fluid ejectors. Each fluid ejector includes a pumping chamber, and an actuator configured to cause fluid to be ejected from the pumping chamber. The fluid ejection apparatus includes a feed channel fluidically connected to each pumping chamber; and at least one compliant structure formed in a surface of the feed channel. The at least one compliant structure has a lower compliance than the surface of the feed channel.

A liquid ejection head includes a laminated body including a first plate having a plurality of ejection nozzles for ejecting a liquid and made from a resin material and a second plate having a plurality of through-holes communicating with the corresponding ejection nozzles and made from a metal material. The laminated body has a plurality of projection parts formed along the array direction Y of the ejection nozzles and having a curved dome shape projecting in the direction from the second plate to the first plate. The second plate has a plurality of through-slits formed adjacent to the projection parts.

A liquid ejection head includes a laminated body including a first plate having a plurality of ejection nozzles for ejecting a liquid and made from a resin material and a second plate having a plurality of through-holes communicating with the corresponding ejection nozzles and made from a metal material. The laminated body has a plurality of projection parts formed along the array direction Y of the ejection nozzles and having a curved dome shape projecting in the direction from the second plate to the first plate. The second plate has a plurality of through-slits formed adjacent to the projection parts.

According to one or more embodiments, a liquid discharge head comprises a substrate, a nozzle plate, and a damper member. The substrate comprises a plurality of pressure chambers. The nozzle plate is provided on a first surface of the substrate and comprises a plurality of nozzles, each of the plurality of nozzles aligned with a corresponding one of the plurality of pressure chambers. The damper member is provided on a second surface of the substrate and comprises a pressure wave absorbing material.

According to one or more embodiments, a liquid discharge head comprises a substrate, a nozzle plate, and a damper member. The substrate comprises a plurality of pressure chambers. The nozzle plate is provided on a first surface of the substrate and comprises a plurality of nozzles, each of the plurality of nozzles aligned with a corresponding one of the plurality of pressure chambers. The damper member is provided on a second surface of the substrate and comprises a pressure wave absorbing material.

An inkjet printer adjusts operation of a vacuum system coupled to a printhead to compensate for pressure changes in the manifold of the printhead caused by vertical displacement of the printhead within the printer. The inkjet printer includes a controller that determines either a difference between an optimal pressure in the manifold and a current pressure to operate a vacuum coupled to the manifold for pressure adjustment or it correlates a current printhead vertical position to a previously observed vertical position and uses a vacuum value associated with the previously observed vertical position to operate the vacuum.

An ink absorber includes: an ink absorbing member that is capable of absorbing ink; an accommodation section that accommodates the ink absorbing member; and a detachment structure section that detaches the ink absorbing member from the accommodation section. In the ink absorber, it is preferable that the accommodation section have a bottom section and side wall sections standing up from the bottom section, that inclined surfaces inclined relative to the bottom section be formed inside the side wall sections, and that the detachment structure section be configured with the inclined surfaces.