A controller may transition an inkjet printing device, starting from the printing operation, at least predominantly into a continuation mode where the printing is interrupted in which, however, the active tempering of the ink in the one or more print heads of the printing device is continued in order to enable an accelerated restart of the printing operation.

A liquid ejection apparatus includes a liquid ejection head having a plurality of nozzles, a determination circuit, a clock, and a controller. The controller is configured to determine whether the clock is in an on or off state. In response to determining that the clock is in an on state, the controller is configured to perform an inspection process at a first time. In the inspection process, the controller drives the liquid ejection head to eject liquid from a nozzle of the plurality nozzles and receive a determination signal that is output from the determination circuit in response to ejection of liquid from the nozzle of the plurality of nozzles. In response to determining that the clock is in an off state, the controller is configured to perform the inspection process at a predetermined time that is a time after the clock is returned to an on state.

A maintenance method for a liquid discharging apparatus including a discharging portion that discharges liquid, the maintenance method includes acquiring first viscosity information related to viscosity of the liquid inside the discharging portion, discharging a first amount of the liquid from the discharging portion, acquiring second viscosity information related to viscosity of the liquid inside the discharging portion, and discharging a second amount of the liquid based on the first viscosity information and the second viscosity information, from the discharging portion.

An ink jet recording apparatus includes a recording head, a wiper member, a cleaning liquid supply device, and a controller. The recording head includes an ink ejection surface having an ink ejection port from which ink is ejected. The cleaning liquid supply device includes a cleaning liquid supply surface having a cleaning liquid supply port from which cleaning liquid for wiping the ink ejection surface with the wiper member is supplied, and is located upstream of the ink ejection surface in a wiping direction. The controller controls a cleaning operation including squeezing out the cleaning liquid containing bubbles from the cleaning liquid supply port, and moving the wiper member carrying the cleaning liquid containing bubbles, in the wiping direction from a movement start position to an end position ahead of the ink ejection surface.

An inkjet recording device includes: an endless conveyance belt having plural openings; a recording medium supply unit that supplies a recording medium to the conveyance belt; an opening position detection unit that detects positions of the openings in the conveyance belt; a flushing control unit that causes the recording head to perform flushing on the basis of position detection of the openings; and a recording medium supply control unit that controls the recording medium supply unit in any of plural control modes. The plural control modes include: a first control mode in which the recording medium supply unit is controlled independently from the position detection of the openings by the opening position detection unit; and a second control mode in which the recording medium supply unit is controlled on the basis of the position detection of the openings by the opening position detection unit.

A supporting section is disposed to confront an ejection surface and supports a recording medium. A first tank is mounted on a first-tank mount section. A liquid conveying section conveys liquid to a liquid ejecting head. A receiving section receives liquid ejected from the liquid ejecting head. A waste-liquid conveying section conveys liquid to the waste-liquid tank. A first casing holds the liquid ejecting head, the first-tank mount section, and the liquid conveying section. A second casing holds the supporting section, the receiving section, the waste-liquid tank, and the waste-liquid conveying section. The first casing is connected with the second casing such that the first casing is movable relative to the second casing. The first casing takes a first position at which the ejection surface confronts the supporting section and a second position at which the ejection surface is farther away from the supporting section than at the first position.

An inkjet printhead includes a faceplate mounted to a printhead body. The faceplate has a first area in which an array of inkjet nozzle openings is positioned. The area is covered with a hydrophobic coating. A second area of the faceplate outside of the array of inkjet nozzle openings is covered with a first hydrophilic coating that does not contact the hydrophobic coating covering the first area. A third area of the faceplate between the first area and the second area is covered with a second hydrophilic coating. One end of the third area contacts the hydrophobic coating and another end of the third area contacts the first hydrophilic coating to pull ink emitted onto the hydrophobic coating during a purge operation to the second area of the faceplate.

A cleaning method of a liquid ejection head where recording element substrates having an ejection orifice forming-face having ejection orifice arrays which are aligned, and at least one array ejects a different recording liquid than another, includes wiping and preliminary ejection. In the wiping, a wiping member is caused to move along and wipe the arrays. In the preliminary ejection, before the wiping of the entire ejection orifice forming-face is completed, preliminary ejection from the wiped ejection orifices is started. The wiping and preliminary ejection are sequentially performed from a recording element substrate at one end to a recording element substrate at the other end.

A purge cycle is performed with an ink delivery system of an inkjet printer by applying a pressure pulse to a printhead in the printer that is substantially shorter than pressure pulses previously used. A pressure at a predetermined threshold is generated behind a valve and then release to the printhead. The duration of the pressure application is in a range of about 150 milliseconds to about 250 milliseconds. This pressure pulse substantially reduces the amount of ink emitted during the purge. A bidirectional wipe of the printhead face is effective for restoring inkjets in the printhead even though the amount of emitted ink is substantially reduced.

An image forming apparatus (1) includes a recording head section (4), a spray section (10), and a controller (9). The recording head section (4) forms an image on a paper sheet (S). The spray section (10) sprays a drug toward the paper sheet (S) to form a drug region (R) on the paper sheet (S). The controller (9) controls the spray section (10). The controller (9) controls the spray section (10) such that at least a part of the image formed on the paper sheet (S) and at least a part of the drug region (R) overlap each other.