According to an aspect of the present invention, an inkjet printing apparatus includes a print head having an ejection opening surface on which ejection openings for ejecting ink are formed, a tank storing ink to be supplied to the print head, a supply flow path for supplying the ink from the tank to the print head, a collection flow path for collecting the ink from the print head to the tank, a supply pump provided in the supply flow path to supply the ink from the tank to the print head, a tank decompression pump which decompresses the inside of the tank, and a control unit which controls to drive the supply pump and the tank decompression pump to fill the collection flow path with ink.

A liquid ejecting head includes a first sidewall, a second sidewall, and head chips. The head chips are arranged side by side between the first sidewall and the second sidewall. Each of the head chips has nozzles configured to discharge a liquid. The first sidewall is formed by a portion of a holder from which the liquid is to be supplied to the head chips, whereas the second sidewall is formed by a portion of a fixed plate to which the head chips are fixed. The fixed plate has an aperture through which the nozzles are exposed.

A printer includes a head, an electrode, a moving unit, a voltage application circuit, and a controller. The head has an ejection surface having a nozzle. The head is configured to eject liquid from the nozzle. The moving unit is configured to move at least one of the electrode or the head. The voltage application circuit is configured to apply a certain voltage between the head and the electrode. The controller is configured to: drive the moving unit such that the ejection surface faces the electrode; drive the voltage application circuit to apply the certain voltage between the head and the electrode; compare a level of an output signal input to the controller from the electrode with a particular threshold; and based on the comparison result, determine that liquid is present between the ejection surface and the electrode.

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 printhead maintenance system includes: an inkjet printhead; a carriage movable longitudinally along the printhead in a cleaning direction, the carriage having a maintenance member including: a fluid bath having a mouth opposing the nozzle face of the printhead, a primary fluid inlet at an upstream end of the fluid bath relative to the cleaning direction, a suction nozzle at a downstream end of the fluid bath relative to the cleaning direction and a pair of wipers flanking the fluid bath; and a traversing mechanism for traversing the carriage along the printhead. The maintenance member does not contact inkjet nozzles of the printhead; the wipers each comprise a wiper material for contacting respective parts of the printhead flanking a nozzle face; and the wiper material is air-permeable such that, in use, suction of air through the wiper material into the fluid bath generates a foam in the fluid bath.

A liquid discharge apparatus includes a head including a nozzle surface having nozzles, the head configured to discharge a liquid from the nozzles, a head plate holding the head, and a wiping device including a wiper configured to wipe the nozzle surface of the head, a wiper support plate holding the wiper, the wiper support plate vertically movable with respect to the head plate, a cover between the head plate and the wiper support plate, the cover configured to cover the wiper, a lifting device configured to vertically move the wiper support plate and the cover toward the head plate until the cover contacts the head plate, and an adjuster between the wiper support plate and the cover, the adjuster configured to adjust a position of the wiper support plate with respect to the cover.

A highly reliable multilayer structure element substrate according to an embodiment of this present invention comprises: an electrothermal transducer; a temperature detection element formed at a position where the temperature detection element at least partially overlaps the electrothermal transducer in a planar view of the element substrate; and a plurality of wirings connected to the temperature detection element, wherein the temperature detection element can detect temperatures in a plurality of regions when a plurality of different wirings out of the plurality of wirings are selected.

An image forming apparatus includes a recording head that ejects inks of different colors on a recording medium to form an image based on image data, a storage device that stores a plurality of different dot patterns for flushing, and a control device that functions as: a controller that allows the recording head to make flushing; an image area detector that detects an image area in the image data; an overlapping dot counter that counts a number of overlapping dots for each of the plurality of dot patterns according to which flushing is to be made on the image area, the number of overlapping dots being a number of dots in the dot pattern of the ink ejected on the image area; and a dot pattern assignor that assigns, according to the number of overlapping dots, the respective dot patterns for use in flushing with the inks of different colors.

A liquid ejecting apparatus includes a liquid ejecting portion, a strip member, and a supply portion capable of supplying a reaction liquid having a component that cures ink to the strip member, the strip member being provided so as to be able to set a receiving region that receives any one of ink and reaction liquid discharged as waste liquid from a nozzle of the liquid ejecting portion and a contact region that comes into contact with the liquid ejecting portion when any one of ink and reaction liquid is collected, and the supply portion supplies the reaction liquid to a supply region set in the strip member between the contact region and a position farthest from the contact region in the receiving region.

The inkjet recording apparatus includes a conveyance belt, a conveyance plate, a suction unit, an inkjet head, and a cleaning unit. The conveyance belt has a plurality of through holes. The conveyance plate includes a plurality of through holes formed in bottom portions of the plurality of recessed portions. The suction unit is configured to suck the sheet to the conveyance belt. The inkjet head includes a head main body and a head end portion adjacent to the head main body, and faces an upper surface of the conveyance plate via the conveyance belt. The cleaning unit removes ink adhering to a lower surface of the head main body. A depth of the recessed portion in a facing region facing the head end portion of the conveyance plate is shallower than a depth of the recessed portion in a region other than the facing region.