Disclosed is a print head cleaning device for a 3D printer configured to build a component in layers by means of binder jetting, the print head cleaning device comprising a cleaning agent feeding device having an elongated output opening and configured to output liquid cleaning agent through the elongated output opening, and a suction device having an elongated suction gap and configured to suction fluid through the elongated suction gap, wherein a longitudinal axis of the elongated output opening and a longitudinal axis of the elongated suction gap are arranged at an angle to each other.

A maintenance device configured to maintain a head configured to discharge a first liquid, the maintenance device includes a cap configured to contact a nozzle surface of the head, a storage configured to store a second liquid to be supplied into the cap, a supply device configured to supply the second liquid into the cap, a receptacle configured to receive the second liquid supplied into and overflown from the cap, and a collection device configured to collect the second liquid received by the receptacle.

An ink set includes: an inkjet ink which contains a pigment, a resin dispersant, and water and in which the content of an organic solvent having a boiling point of higher than 210° C. is less than 1% by mass; and a maintenance liquid which contains water, a solvent MA, and a solvent MB, in which the solvent MA is an organic solvent formed of a hydrophilic portion such as —OH and a hydrophobic portion that is a portion other than the hydrophilic portion and having an MA value of 5.8 or less, the solvent MB is glycerin, ethylene glycol, or the like, and the content of the solvent MA is in a range of 0.5% by mass to 10% by mass with respect to a total amount of the maintenance liquid.

Provided is a recording head recovery system, which includes a recording head and a wiper. The recording head includes an ink ejection surface provided with an ink ejection region in which ink ejection ports are formed. The recording head is disposed on a wiping direction upstream side of the ink ejection region, and includes a cleaning liquid supply region in which cleaning liquid supply ports for supplying cleaning liquid are formed. A height position of a lower end part of the wiper when passing the cleaning liquid supply region is lower than a height position of the lower end part of the wiper when wiping the ink ejection region.

In a device for regenerating a print head of an inkjet printing device, a fluid is applied onto the nozzle plate of the print head. The one or more nozzles of the print head can be subsequently operated with one or more no-ejection pulses to produce the effect that fluid is drawn from the nozzle plate into the one or more nozzles and mixes with the ink in the one or more nozzles that the viscosity of the ink in the one or more nozzles is reduced.

A cleaning device includes a plurality of cleaning members that come into contact with an ejection surface of a droplet ejector that ejects droplets to clean the ejection surface, in which the plurality of cleaning members are in a wet state.

Some embodiments of a device comprise a cleaning-fluid-supply reservoir; a cleaning-fluid-supply conduit; one or more electrical connectors that are configured to be attached to a printhead and supply electrical signals to the printhead; one or more memories; and one or more processors that are in communication with the one or more memories. Also, the one or more processors cooperate with the one or more memories to cause the device to perform operations that include supplying cleaning fluid from the cleaning-fluid-supply reservoir, through the cleaning-fluid-supply conduit, to the printhead, and while supplying the cleaning fluid to the printhead, sending a signal to the printhead, through the one or more electrical connectors, to activate one or more piezo-electric actuators of the printhead.

A maintenance apparatus that prevents a reduction in image quality of an image recorded by a liquid discharge head is provided. A maintenance apparatus includes an application unit configured to come into contact with a discharge surface included in a recording head and apply a cleaning liquid to the discharge surface, wherein discharge ports configured to discharge a liquid are formed on the discharge surface, a suction unit configured to suction the discharge surface, a movement unit configured to move the suction unit relative to the recording head, and a control unit configured to execute a first cleaning mode where, after the application unit applies the cleaning liquid, the suction unit suctions the discharge surface.

A liquid discharge device includes a liquid discharge head including nozzles configured to discharge a liquid, a carriage mounting the liquid discharge head and movable, a wiper configured to wipe a nozzle surface of the liquid discharge head, and a wiper mover configured to hold and move the wiper between a facing position at which the wiper faces the nozzle surface and a standby position at which the wiper does not face the nozzle surface. The carriage movably holds the liquid discharge head and the wiper mover as a single unit.

An inkjet printing device and a method of addressing non-discharge. The inkjet printing device comprises a print head including nozzles that discharge an ink including light emitting elements, a dipping bath in which the print head is immersed and which includes a suction solution, and a suctioning part which is connected to the print head and suctions the suction solution along with the ink remaining in the print head unit.