A liquid ejection head includes a substrate; an energy generating member provided on the substrate to generate energy for liquid ejection; a terminal part provided on the substrate to be electrically connected with an outside, the terminal part including at least an electrode for supplying electric power to the energy generating member; a wiring layer provided on the substrate to electrically couple the energy generating member and the electrode; a nozzle member provided on the substrate, the nozzle member including a liquid ejection port and a liquid flow path, the liquid ejection port being arranged to correspond to the energy generating member, and the liquid flow path communicating with the liquid ejection port; and a metal structure provided to cover the wiring layer in a region where neither the nozzle member nor the electrode is provided, and the metal structure is electrically independent of the terminal part.

A liquid ejecting head includes first nozzles configured to eject a liquid in an ejecting direction, a first nozzle forming surface in which openings of the first nozzles are formed, a first surface being adjacent to the first nozzle forming surface when viewed in an opposite direction to the ejecting direction and provided in the ejecting direction relative to the first nozzle forming surface, and a first film member having water repellency on a surface directed to the ejecting direction and being detachably provided to the first surface in such a way as to expose the first nozzle forming surface in the ejecting direction.

A fluid dispenser, comprising a dispenser faceplate having at least one ejection port and a dispenser guard. The dispenser guard has at least one opening configured to allow fluid exiting from the ejection port to flow through and at least one drainage structure. The dispenser guard is spaced from the ejection port with a gap small enough to attract the fluid accumulated around the ejection port to flow into the drainage structure.

A liquid ejecting head with a sealing member includes: a liquid ejecting head including a liquid ejecting surface configured to eject ink; a fixing member configured to be attachable to and detachable from the liquid ejecting head; and a sealing member configured to seal the liquid ejecting head and the fixing member. When the liquid ejecting head to which the fixing member is joined is mounted on a cover, the sealing member seals the liquid ejecting head and the cover.

A head unit includes a common passage, at least one recording head, and a joint mechanism. The common flow passage has a liquid feed passage through which to pass at least one kind of liquid including ink. The recording head is attachable and detachable to and from the common flow passage, and has nozzles through which to eject the ink. The joint mechanism couples the liquid feed passage to a liquid feed port in the recording head, and has a first valve for opening and closing the liquid feed passage and a coupling member for coupling the first valve to the liquid feed port. In the top surface of the coupling member is a liquid reservoir portion for storing, when the recording head is removed from the common flow passage with the first valve closed, ink left between the first valve and the coupling member.

There are provided an inkjet head, an inkjet image forming apparatus, a nozzle plate manufacturing method, and an inkjet head manufacturing method capable of improving durability against wiping on an ink discharge surface. The inkjet head includes a nozzle substrate including nozzle holes from which ink is discharged. The nozzle substrate has an irregularity structure formed on an ink discharge surface such that neither ink particles contained in the ink nor a wiping member that wipes the ink discharge surface get caught by the irregularity structure.

According to one embodiment, a liquid discharge head includes an actuator with a plurality of pressure chambers. A cover covers one side of the actuator and includes a common liquid chamber that connects to the plurality of pressure chambers and an air bubble venting flow path connected to the common liquid chamber. A nozzle plate is on a side of the actuator opposite the common liquid chamber and includes a plurality of first nozzles that faces the plurality of pressure chambers and a second nozzle that faces an outlet of the air bubble venting flow path. A mask plate covers the nozzle plate on a side opposite of the actuator and has a first window exposing the plurality of first nozzles and a second window exposing the second nozzle.

A liquid ejection head includes a substrate; an energy generator that is provided on the substrate; an electrode portion that is provided on the substrate; a liquid ejection face that is provided near a surface of the substrate having the electrode portion; and flexible printed circuits including a conductive pattern and a base material having a first surface and a second surface, the first surface having the conductive pattern, the second surface being provided on the opposite side from the first surface. The base material of the flexible printed circuits has a leading region from the terminal end of a region having the conductive pattern to an end of the base material near the energy generator, without formation of the conductive pattern in the leading region, and at least a part of the second surface of the leading region inclines toward the substrate.

A printing apparatus that eliminates an abnormality, which deteriorate printing quality, at timing based on a state of the abnormality and requested printing quality.

A liquid ejecting apparatus includes a liquid supply path through which liquid is supplied to a liquid ejecting head, a liquid discharge path through which the liquid is discharged from the liquid ejecting head, a supply-side pressure adjustment mechanism that adjusts a pressure in a supply-side liquid chamber provided in the liquid supply path to a first pressure at which a gas-liquid interface formed at a nozzle of the liquid ejecting head is maintained, a discharge-side pressure adjustment valve that introduces fluid into a discharge-side liquid chamber when a pressure in the discharge-side liquid chamber provided in the liquid discharge path becomes a second pressure which is lower than the first pressure and at which the gas-liquid interface formed at the nozzle is maintained, and a flow mechanism that discharges the liquid in the liquid ejecting head toward the liquid discharge path via the discharge-side liquid chamber.