A printer is provided with a head configured to discharge ink, a fan configured to cool the head, a sensor configured to output a detection signal indicating a state of the fan. A processer of the printer performs decision processing of deciding print control based on a detection signal output by the sensor. In the decision processing, the processor decides a first print control to drive the fan and control printing by the head in a first print mode, when the detection signal does not indicate a failure state of the fan. In the decision processing, the processor decides a second print control to control the printing by the head in a second print mode suppressing generation of heat more than the first print mode, when the detection signal indicates the failure state of the fan.

An inkjet head includes a back end part, a front end part, and a heating plate. The back end part includes an ink passage. The back end part is fed with ink and delivers the fed ink. The front end part is supplied with ink from the back end part. The front end part includes nozzles. The heating plate includes a heating element to produce heat by electricity. The heating plate is disposed between the back end part and the front end part. The heating plate conducts heat from the other side of plane so as to heat the front end part. The heating plate conducts heat from one side of plane so as to heat the back end part.

An inkjet printing apparatus includes a print head including an inkjet head having a nozzle surface; nozzles disposed on the nozzle surface, that spray an ink from the nozzles; and a heater that heats a temperature of the inkjet head to a reference temperature. The nozzles include a first nozzle having a first diameter; and a second nozzle having a second diameter different from the first diameter of the first nozzle, the nozzle surface includes a first area in which the first nozzle is disposed and a second area in which the second nozzle is disposed, the first area has a first temperature in case that the heater heats the inkjet head to the reference temperature, and the second area has a second temperature different from the first temperature in case that the heater heats the inkjet head to the reference temperature.

The present disclosure includes a description of an example printhead having multiple ejection dies. The ejection dies are coupled to a temperature sensor and send temperature signals to a controller. The printhead can also include a heater coupled to the ejection dies to apply heat to at least one ejection die.

The disclosure relates to an application device for applying an application medium onto a component, preferably for application of a coating onto a motor vehicle body component. The application device includes a print head for preferably serial and/or permanent application of the application medium, wherein the print head has: a nozzle plate, at least one nozzle in the nozzle plate in order to discharge the application medium, at least one valve element, which is movable relative to the nozzle plate, for control of the application medium discharge through the at least one nozzle, wherein the at least one movable valve element closes the at least one nozzle in a closing position and releases it in an opening position, and at least one drive for moving the at least one valve element. The application device is characterised in particular in that it includes at least one temperature control apparatus for reducing heating of the at least one drive during application of the application medium.

A liquid discharge head according to an embodiment includes a head body having a first surface configured to discharge a liquid and a second surface facing the first surface, a drive IC positioned away from the second surface of the head body, and a head cover configured to cover at least the second surface of the head body while housing the drive IC. The head cover includes a top plate facing the second surface of the head body and a first side plate extending in one direction that is a direction from the top plate toward the second surface, the first side plate includes a first portion that is in contact with the drive IC, and that extends in the one direction, and a second portion positioned in a portion closer to the second surface than the first portion, and the second portion includes a diameter expanding portion having a diameter that expands toward the second surface.

A liquid discharge head includes an individual liquid chamber having a nozzle through which a liquid is discharged in a liquid discharge direction, a piezoelectric element facing the individual liquid chamber, a first groove adjacent to the piezoelectric element in a nozzle array direction, a dummy individual liquid chamber without any nozzle, a dummy piezoelectric element facing the dummy individual liquid chamber, and a second groove adjacent to the dummy piezoelectric element in the nozzle array direction. The first groove extends in the liquid discharge direction. The second groove has a shorter length in the liquid discharge direction than the first groove.

A liquid discharge head includes a connector component, a head unit, and a relay module component. The connector component is electrically connectable to a drive board. Ink from an ink chamber is supplied to the head unit. The relay module component is between the connector component and the head unit. The relay module component is detachable from the connector component and the head unit. The relay module component includes a channel to supply the ink supplied from the ink chamber to the head unit.

A head module includes: a plurality of heads, a base on which the plurality of heads is arrayed in a head array direction, a plurality of individual heatsinks respectively attached to the plurality of heads, and a common heatsink standing on the base, the common heatsink including a connector thermally connected to each of the plurality of individual heatsinks. The connector of the common heatsink is along the head array direction and is adjacent to each of the plurality of individual heatsinks in a direction perpendicular to the head array direction.

There is provided a head module including: a liquid discharging head; a driver IC; a heat sink; and a fan. The head module includes: a channel unit; and an energy-applying mechanism. The heat sink includes: a base part; and a plurality of fins including: a first fin, a second fin, and a third fin. A plane direction of a plane in which the first fin expands crosses a plane direction of a plane in which the second fin expands, and crosses a plane direction of a plane in which the third fin expands. The fan is arranged at a position at which the fan overlaps with the base part in the first direction, and in a space surrounded by the first fin, the second fin, the third fin and the base part.