A technique capable of appropriately detecting a timing for replacement of a liquid ejection head is to be provided. A liquid ejection head including: a first electrode configured to protect an electrothermal conversion element that ejects a liquid from an ejection port and to be capable of eluting into the liquid by an electrochemical reaction with the liquid; and a second electrode installed so as to be electrically connectable to the first electrode via the liquid, wherein a voltage is applied to cause the second electrode to generate the electrochemical reaction with the first electrode, so that the first electrode is eluted into the liquid, wherein polarities can be reversed between the first electrode and the second electrode for applying the voltage, and wherein wiring resistance in a circuit including a plurality of second electrodes as a part of wiring can be measured.

A technique capable of appropriately detecting a timing for replacement of a liquid ejection head is to be provided. A liquid ejection head including: a first electrode configured to protect an electrothermal conversion element that ejects a liquid from an ejection port and to be capable of eluting into the liquid by an electrochemical reaction with the liquid; and a second electrode installed so as to be electrically connectable to the first electrode via the liquid, wherein a voltage is applied to cause the second electrode to generate the electrochemical reaction with the first electrode, so that the first electrode is eluted into the liquid, wherein polarities can be reversed between the first electrode and the second electrode for applying the voltage, and wherein wiring resistance in a circuit including a plurality of second electrodes as a part of wiring can be measured.

A liquid ejecting device includes a head including a nozzle and configured to eject, from the nozzle, liquid supplied from a plurality of supply sources, a plurality of supply channels coupled to the plurality of supply sources and the head, a plurality of reservoir portions located respectively at the plurality of supply channels, each of the plurality of reservoir portions including a storage chamber configured to store the liquid supplied from the plurality of supply sources, a plurality of discharging channels respectively coupled to the plurality of reservoir portions, and each configured to eject a bubble from the plurality of storage chambers, and a suctioning portion configured to apply a negative pressure to the plurality of discharging channels. Each of the plurality of discharging channels includes a resistance portion with a larger pressure loss than a corresponding supply channel of the plurality of supply channels.

An inkjet printer includes solvent vapor generators that direct two flows of solvent vapor on each side of each printhead in the process direction toward media passing the printheads in the printer. The solvent vapor attenuates the evaporation of ink solvent from ink drops on the nozzle plates or from the ink in the nozzles of the printheads. Thus, the ink on the nozzle plates and in the nozzles does not dry out and the operational status of the inkjets is preserved.

An inkjet printer includes solvent vapor generators that direct two flows of solvent vapor on each side of each printhead in the process direction toward media passing the printheads in the printer. The solvent vapor attenuates the evaporation of ink solvent from ink drops on the nozzle plates or from the ink in the nozzles of the printheads. Thus, the ink on the nozzle plates and in the nozzles does not dry out and the operational status of the inkjets is preserved.

A droplet discharge apparatus includes a discharger, a suction device, a connector, and a collector. The discharger discharges droplets. The suction device sucks generated matter when the discharger discharges droplets. The connector connects the discharger with the suction device and includes a path through which the generated matter is to be sent in a suction direction from the discharger toward the suction device. The collector in the path collects the generated matter. The collector has a larger cross-sectional area to collect the generated matter than a cross-sectional area of the connector in at least one of the suction direction or in a direction orthogonal to the suction direction.

A liquid ejecting apparatus includes: a head that ejects a liquid; a curing portion that cures the liquid by emitting energy to the liquid; and a waste-liquid collecting portion that collects the liquid as waste liquid, in which the waste-liquid collecting portion includes an absorber that absorbs the liquid from the head, a first rotational shaft that holds an unused portion of the absorber, and a second rotational shaft that holds a used portion of the absorber, and the curing portion emits the energy to the liquid absorbed by the absorber.

An integrated inkjet module includes: a support chassis configured for fixedly mounting over a media feed path; a maintenance chassis mounted on the support chassis; a print bar chassis liftably mounted on the maintenance chassis, the print bar chassis having a plurality of print modules mounted thereon, each print module comprising a respective printhead; and an aerosol collector fixed to the support chassis and positioned for collecting ink mist generated during printing.

A coloring composition includes: a compound represented by the General Formula (1) as defined herein; and a compound represented by the General Formula (D) as defined herein, in which a mass ratio {General Formula (1)/General Formula (D)} of a content of the compound represented by the General Formula (1) to a content of the compound represented by the General Formula (D) is {99/1} to {50/50}.

A printhead maintenance system for a printing machine having at least one printhead, the system includes a body, at least one guide track supporting the body for movement along the at least one guide track in proximity to the face of the printhead, and a drive mechanism in engagement with the body and operable to move the body along the guide track. A wiper blade is movably mounted on said body for movement between a retracted position in which the wiper blade cannot contact the face of the printhead and an operative position in which the wiper blade can contact the face of the printhead. A biasing mechanism is provided between the wiper blade and the body that is configured to bias the wiper blade to the operative position. The system includes a retraction mechanism that is operable to move the wiper blade to the retracted position upon movement of the body along the guide track.