A liquid ejection head includes a supply channel structure and a heater. The supply channel structure has a supply channel configured to allow liquid to flow therefrom to ejection channels that are configured to lead liquid to nozzles aligned in a first direction. The heater is configured to heat liquid. Assuming that a side of the liquid ejection head, in which the nozzles are provided, is defined as a lower side of the liquid ejection head, the heater is disposed above the supply channel structure.

A liquid discharge apparatus includes a heater configured to heat a medium, a detector configured to detect a temperature of the heater, a conveyor configured to convey the medium during a printing operation, and circuitry configured to control the heater to heat the medium with a first output during a preheating operation before the printing operation, control the heater to heat the medium with a second output that is equal to or higher than the first output when the temperature of the heater reaches a predetermined threshold value to complete the preheating operation, and control the conveyor to start conveying the medium to start the printing operation.

A liquid discharge apparatus includes a heater configured to heat a medium, a detector configured to detect a temperature of the heater, a conveyor configured to convey the medium during a printing operation, and circuitry configured to control the heater to heat the medium with a first output during a preheating operation before the printing operation, control the heater to heat the medium with a second output that is equal to or higher than the first output when the temperature of the heater reaches a predetermined threshold value to complete the preheating operation, and control the conveyor to start conveying the medium to start the printing operation.

A liquid discharge apparatus includes a plurality of heads configured to discharge a liquid, a liquid supply manifold configured to distribute the liquid to the plurality of heads, and a temperature-controlled liquid supply manifold configured to supply a temperature-controlled liquid to the plurality of heads. The temperature-controlled liquid supply manifold is thermally coupled to the liquid supply manifold.

A liquid ejection head includes a supply channel structure and a heater. The supply channel structure has a supply channel configured to allow liquid to flow therefrom to ejection channels that are configured to lead liquid to nozzles aligned in a first direction. The heater is configured to heat liquid. Assuming that a side of the liquid ejection head, in which the nozzles are provided, is defined as a lower side of the liquid ejection head, the heater is disposed above the supply channel structure.

A control circuit for a thermally-activated microfluidic ejection element and a method of dispensing a fluid composition from the same is provided. The thermally-activated microfluidic ejection element includes a plurality of nozzles and a thermal actuator associated with each nozzle, and a control circuit that includes: a logic circuit that increments through a pre-determined sequence, wherein the sequence is defined by the physical layout of the thermally-activated microfluidic ejection element; a first input in electrical communication with the logic circuit; a second input in electrical communication with each thermal actuator, wherein the first input and second input are used to select and energize each thermal actuator on the thermally-activated microfluidic ejection element.

An inkjet recording apparatus includes a conveying unit, a recording unit, a heat source, a heat source moving unit and a heat source moving control unit. The conveying unit performs a conveying operation to move a conveying member thereby conveying a recording medium placed on a conveying surface of the conveying member. The recording unit records an image by ejecting ink to the recording medium conveyed by the conveying unit. The heat source moving unit moves the heat source. The heat source moving control unit moves the heat source by the heat source moving unit such that a distance between the heat source and the conveying surface increases when the conveying operation which is performed by the conveying unit stops in a manner in which the conveying operation can be resumed in a state where the heat source is positioned in proximity of the conveying surface.

According to one embodiment, a tablet printing apparatus includes: a conveying path where a tablet is conveyed; a drying device configured to dry the tablet in the conveying path; and a print head device located on the downstream side of the drying device in the conveying path. The print head device is configured to perform printing on the tablet dried by the drying device.

A recording apparatus includes a recording head having a plurality of recording elements configured to generate energy for discharging ink, a first heating element configured to heat ink in the vicinity of one of said recording elements positioned at a first position, insufficiently to discharge ink, and a second heating element positioned at a second position different from the first position, which are arranged on a same substrate, a heating control unit configured to control the heating operation of the ink by driving the first and the second heating elements by applying voltage to the first and the second heating elements, and a recording control unit configured to control the recording operation by driving the plurality of recording elements, wherein the heating control unit is configured to control the heating operation to drive the first heating element and the second heating element at timings different from each other.

A control circuit for a thermally-activated microfluidic ejection element and a method of dispensing a fluid composition from the same is provided. The thermally-activated microfluidic ejection element includes a plurality of nozzles and a thermal actuator associated with each nozzle, and a control circuit that includes: a logic circuit that increments through a pre-determined sequence, wherein the sequence is defined by the physical layout of the thermally-activated microfluidic ejection element; a first input in electrical communication with the logic circuit; a second input in electrical communication with each thermal actuator, wherein the first input and second input are used to select and energize each thermal actuator on the thermally-activated microfluidic ejection element.