In image forming apparatus, a recording head is configured to eject ink corresponding to an image to be printed, using arranged nozzles. A control unit is configured to determine nozzles corresponding to the image to be printed, correspondingly to a position of a print sheet, and cause the recording head to eject ink from the nozzles. A correction processing unit is configured to perform a correction process corresponding to each of the plural ink ejection malfunction positions in the image. A head cleaning processing unit is configured to perform head cleaning for the recording head. Further, if the number of the detected ink ejection malfunction positions exceeds a predetermined upperlimit value when using a predetermined ink droplet size, the correction processing unit causes the head cleaning processing unit to perform head cleaning for the recording head and thereby decreases the number of the ink ejection malfunction positions.

A wiping device includes a wiping member and a moving part. The wiping member wipes a liquid off a nozzle surface of a recording head. The moving part moves the wiping member along the nozzle surface in a predetermined moving direction. The wiping member performs a first wiping operation in which the wiping member is moved while not coming into contact with the nozzle surface but coming into contact with the liquid adhering to the nozzle surface, and a second wiping operation in which the wiping member is moved while coming into contact with the nozzle surface after the first wiping operation.

The controller of an inkjet recording apparatus supplies a recording medium onto the conveyor belt with a pair of registration rollers based on a detection result of the trailing edge of the recording medium by a first detection sensor and a detection result of an opening by a second detection sensor. The controller determines whether the recording medium is being placed on the conveyor belt coinciding with the opening that is moved due to the traveling of the conveyor belt, and based on the determination result, the controller controls the recording head to execute flushing and the pair of registration rollers to supply a subsequent recording medium onto the conveyor belt.

In some examples, a printing press includes a printing unit with at least four nozzle bars, each including a print head. At least one nozzle bar has a printing position and at least one service position. For instance, in a first service position, the at least one nozzle bar has a first distance to the transport path of a printing substrate, and in a second service position the at least one nozzle bar has a second distance to the transport path. The printing unit includes at least one cleaning device and/or cleaning system that is selectively arranged in an area between the at least one nozzle bar and the transport path. The at least one service position may be arranged in vertical direction above the printing position, and the second distance of the second service position of the nozzle bar may be less than in the first service position.

An image forming apparatus includes a recording head and a wiper. The recording head is provided with a nozzle region where a plurality of ink ejection ports are opened downward. The wiper comes into contact with the nozzle region and moves in a predetermined direction to wipe the ink ejection ports. A head mounting part protruding outward is provided along the wiping direction on a side surface of the recording head at a position higher than the nozzle region. The head mounting part has: an outside portion having a water repellency higher than that of the side surface; and an inside portion provided inside the outside portion and having a water repellency smaller than that of the outside portion.

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.

A first chart is recorded on a recording medium by discharging ink from predetermined nozzles of a recording head at a plurality of discharge timings set in advance with the detection time point of the recording medium by a recording medium detection sensor as a reference time point, and a second chart is recorded alongside the first chart on the recording medium by discharging the ink from other nozzles of the recording head at a plurality of discharge timings set in advance with the detection time point of the recording medium by the opening detection sensor as a reference time point. A flushing timing, which is set with the detection time point of the opening by the opening detection sensor as the reference time point, is adjusted in accordance with an input of an instruction following the recording of the first chart and the second chart on the recording medium.

One example of a fluid ejection system includes a plurality of fluid ejection devices, a corresponding plurality of indicators, an operator interface, and a controller. Each indicator is on a corresponding fluid ejection device. The operator interface is to select a fluid ejection device. The controller is to turn on the corresponding indicator for the selected fluid ejection device.

An object is to provide a liquid ejection apparatus and a method of controlling a liquid ejection apparatus capable of preventing bubbles generated by kogation removal from interfering with the kogation removal. To this end, in a long liquid ejection head with a liquid circulated therethough, a pressure chamber is pressurized and a voltage is applied to a heat applying portion and an electrode to perform kogation removing cleaning.

A method of operating a printer supplies an ink solvent or mixture of ink solvents to porous members positioned adjacent printheads. The ink solvent or solvent mixture evaporates from the porous members to provide a solvent vapor environment in the vicinity of the nozzle plates of the printheads. The solvent vapor environment 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.