An inkjet head maintenance mechanism includes: an inkjet head including a nozzle plate with ejection ports arranged in the nozzle plate and configured to eject droplets of ink, and a protection plate stacked on the nozzle plate and having an opening formed at a position corresponding to the ejection ports and exposing the ejection ports to an outside; a cap configured to come into contact with the protection plate and surround the opening of the protection plate; and a controller configured to detect an on-off state of a power supply of an inkjet printer to which the inkjet head is attached and adjust a contact pressure of the cap onto the protection plate depending on the detected on-off state of the power supply.

Disclosed is a water-repellent film 102 including a substrate 100, and a water-repellent organic material provided on the substrate 100, in which a plurality of regions having different concentrations of the water-repellent organic material are formed, and each of the regions having different concentrations continuously exists in a film thickness direction from a boundary surface with respect to the substrate to a surface of the water-repellent film. Preferably, in the regions having different concentrations, a region having a relatively higher concentration 102a is formed into the shape of a column, and a region having a relatively lower concentration 102b than that of the columnar region exists around the columnar region.

An apparatus and method for depositing an aerosol that has an ultrafast pneumatic, shutter. The flow of aerosol through the entire deposition flow path is surrounded by at least one sheath gas, thereby greatly increasing reliability. The distance between the aerosol switching chamber and a reverse gas flow chamber input is minimized to reduce switching time. The distance from the switching chamber to the nozzle exit is also minimized to reduce switching time. The gas flows in the system are configured to maintain a substantially constant pressure in the system, and consequently substantially constant flow rates through the deposition nozzle and exhaust nozzle, to minimize on/off switching times. This enables the system to have a switching time of less than 10 ms.

A liquid ejection device is a liquid ejection device to which a liquid accommodation portion accommodating a liquid containing a solvent is attached, and includes a liquid ejection portion in which a nozzle that ejects the liquid is open, a cap that forms a space communicating with the nozzle by coming into contact with the liquid ejection portion, an atmosphere flow path coupled to the liquid accommodation portion and the cap, and a dehumidification portion that dehumidifies an atmosphere inside at least any one of the liquid accommodation portion, the cap, and the atmosphere flow path.

A printhead device includes firing chambers, nozzles, and shipping fluid. The shipping fluid includes a shipping fluid density and a shipping fluid viscosity greater than a corresponding ink density and ink viscosity of an ink that will be ejected from the firing chambers and through the nozzles.

A liquid ejection head and a liquid ejection apparatus capable of maintaining a high reliability is provided. For this purpose, a first cover member including an aperture and covering a surface of a flow path member facing a print medium of a liquid ejection head, and a second cover member covering a side surface of the liquid ejection head are provided, and a displacement absorption part that absorbs the displacement between the first cover member and the second cover member is provided. Furthermore, the space between the aperture and the flow path member is sealed with a sealing material.

An ink-jet head protection device used in a building area having accumulated powder is provided. The ink-jet head protection device includes a movable base and an airflow guiding mechanism. The movable base includes an ink-jet head base. The ink-jet head base includes one or more ink-jet heads. The ink-jet head is arranged corresponding to the building area. The airflow guiding mechanism is assembled to the movable base. The airflow guiding mechanism generates a dust separating airflow and includes an airflow opening for guiding the dust separating airflow flowing between the ink-jet head and the building area. The dust separating airflow is used to isolate the powder spilled from the building area. Accordingly, the airflow guiding mechanism generates the dust separating airflow flowing between the ink-jet head and the building area.

A liquid ejection head unit is formed by arranging a plurality of recording element substrates in a first direction. The recording element substrate has an ejection orifice from which a liquid is ejected. The liquid ejection head unit includes: rail portions extending in the first direction and a protective member which is detachably fitted on the rail portions. The protective member is movable along the rail portions between a first position and a second position. The first position allows the protective member to cover whole surfaces of the plurality of recording element substrates. The second position allows the plurality of recording element substrates to be exposed so as to allow a liquid to be ejected from the ejection orifice.

A liquid ejection head unit includes an ejection port surface on which an ejection port is provided, includes a page-wide type liquid ejection head detachably attached to a liquid ejecting apparatus and a protective member detachably attached to the liquid ejection head, the liquid ejection head includes a first rail portion, the protective member includes a second rail portion along a longitudinal direction thereof, the protective member is made to slide to a first direction along the longitudinal direction of the liquid ejection head and covers the ejection port surface, the protective member is attached to the liquid ejection head and then, the liquid ejection head and the protective member are moved in a second direction opposite to the first direction and are removed from the liquid ejecting apparatus.

A liquid ejecting head includes a head body which has a nozzle opening for ejecting a liquid and a first wiping surface to be wiped by a wiper; and a target wiping member which has a second wiping surface to be wiped by the wiper, wherein the head body and the target wiping member are lined up via a gap so as to face in the same direction as the first wiping surface and the second wiping surface, and an elastic member is elastic deformed and held in the gap to block the gap on a side of the first and second wiping surface.