Provided are an inkjet head and an inkjet recording device that can effectively heat an ink near nozzles of a nozzle board or an ink inside a head chip. The inkjet head includes the head chip in which a nozzle board, an intermediate plate, a pressure chamber board, a spacer board, and a wiring board are joined in order, a common ink chamber forming member provided at a side of the wiring board of the head chip to form at least a part of a common ink chamber, and a heater provided to the common ink chamber forming member. The nozzle board is smaller than the intermediate plate when the head chip is viewed from the side of the nozzle board in plan view. A thermal conductive member being in contact with the heater and joined with the nozzle board and the wiring board across the head chip is provided. At least a part of the wiring board and a part of the common ink chamber forming member are joined through the thermal conductive member. The thermal conductive member is joined with a side surface of the nozzle board and a nozzle board-side surface of the intermediate plate, the nozzle board-side surface being larger than the nozzle board.

An apparatus including a control cylinder rotatably supported for thermal conduction to a sheet. The sheet conveys ink deposited on a first side. The sheet is held against a peripheral arch of the control cylinder as it rotates with the first side of the sheet directly engaging and wrapping around the control cylinder along the peripheral arch. The apparatus also includes a thermal control element for heating and/or cooling the control cylinder. The apparatus also includes a pressure roll for spreading the ink. The pressure roll with the control cylinder forms a spreader nip, which is selectively changeable between a closed and open position. In the closed position the pressure roll is biased toward the control cylinder for applying pressure to the ink on the sheet. The pressure roll is spaced further away from the control cylinder in the open position relative to the closed position.

A liquid heating apparatus for heating a liquid that is supplied to a liquid droplet ejection head is provided. The liquid heating apparatus includes a liquid chamber unit configured to be disposed on the supply route of the liquid and to temporarily store the liquid, and a temperature-adjusting flow path unit configured to heat the liquid supplied from the liquid chamber unit.

A circulation device according to an aspect includes a storage unit for storing liquid and a liquid droplet discharge unit for discharging liquid, and controls circulation of liquid flowing through a channel communicating the storage unit and the liquid droplet discharge unit with each other. Such a circulation device includes a robotic portion, a first pressure portion, a second pressure portion, a first valve portion, and a second valve portion. The robotic portion is mounted with the liquid droplet discharge unit. The first pressure portion feeds the liquid stored in the storage unit to the liquid droplet discharge unit through a first channel communicating the storage unit and the liquid droplet discharge unit with each other. The second pressure portion feeds the liquid recovered in the liquid droplet discharge unit to the storage unit through a second channel communicating the storage unit and the liquid droplet discharge unit with each other. The first valve portion is interposed between the first pressure portion and the liquid droplet discharge unit. The second valve portion is interposed between the second pressure portion and the liquid droplet discharge unit.

A solid ink composition suitable for ink jet printing, including printing on coated paper substrates. In particular, the solid ink composition comprises a crystalline compound, an amorphous compound, and an inorganic nucleating agent, which provides for a robust and fast printing ink.

A reservoir in a printer includes a body that includes a first inlet and a first outlet. The body defines an internal volume positioned between the first inlet and the first outlet. A valve is positioned within the body. Ink flows from the first inlet, through the valve, and into the internal volume when the valve is in an open position, and the ink is prevented from flowing through the valve and into the internal volume when the valve is in a closed position. The ink is configured to flow from the internal volume, through the first outlet, and into a printhead. A heater is positioned within the body, and the heater is configured to heat the ink.

Functional amine release agents displaying improved wetting as compared to standard silicone oils comprise a polydimethylsiloxane oil and a functional amine selected from the group consisting of pendant propylamines and pendant N-(2-aminoethyl)-3-aminopropyl, in which the concentration of functional amine to polydimethylsiloxane oil is approximately less than 0.0006 meq/g and the release agents have a viscosity of 20 cSt and 10 cSt. In an in-line tandem print system, the 20 cSt release agent is used in the upstream print engine while the 10 cSt release agent is used in the downstream print engine.

An image forming apparatus includes: a main tank that stores ink; an ink head unit that includes a first heating device to heat the ink and that ejects the heated ink; a supply channel that supplies the ink from the main tank to the ink head unit; and a second heating device that heats the supply channel. The second heating device starts heating at a predetermined timing such that a temperature of a specific region in the supply channel becomes equal to or more than a second temperature that is a melting point of a component having a highest melting point.