A head unit of an ink jet printer is formed with a mist removing space for removing an ink mist generated when an UV ink is discharged by an ink jet head from a gap between the head unit and a table, where the mist removing space is formed with a gas introducing port, arranged at a position between the ink jet head and the LED, for the gas to be introduced from the gap side between the head unit and the table to the mist removing space, an intake port for the gas to be suctioned from the mist removing space toward a sirocco fan side by an airflow generated by the sirocco fan, and a gas discharging port, arranged separately from the intake port, for the gas to be discharged from the mist removing space.

The invention relates to a washing assistance device for the fluid circuit of an ink jet printer, including: a support (80) defining, between an access front face (80c) and a back face (80d), a substantially parallelepiped free volume (80a), support anchoring means (88), means forming 2 fluid connections, the support anchoring means (88) and the 2 fluid connections being disposed on or against the back face, on the opposite side to said free volume (80a).

The invention relates to a washing assistance device for the fluid circuit of an ink jet printer, including: a support (80) defining, between an access front face (80c) and a back face (80d), a substantially parallelepiped free volume (80a), support anchoring means (88), means forming 2 fluid connections, the support anchoring means (88) and the 2 fluid connections being disposed on or against the back face, on the opposite side to said free volume (80a).

Disclosed herein are methods for reducing drooling, wetting or adhesion on a front face of an inkjet printhead configured for ejecting aqueous ink. The methods including disposing an anti-wetting, low adhesion coating onto a surface of the inkjet printhead front face, wherein the anti-wetting, low adhesion coating is a reaction product of a reactant mixture including a triisocyanante and a perfluoropolyether diol compound having an ethyoxylated spacer; and ejecting a drop of an aqueous ink having a surfactant from the printhead, wherein the aqueous ink drop exhibits a contact angle of greater than about 40? and a sliding angle of less than about 30? with a surface of the coating on the inkjet printhead front face.

The invention concerns a method for cleaning an ink circuit of an ink-jet printer, comprising at least one tank (10), referred to as the main tank, at least one ink cartridge (30), a pump (31) for pumping the ink from the cartridge, ducts and valves (32-35, 320, 340, 341, 343, 344) for fluid connection between the ink cartridge and the tank, and control panel (3) for controlling the printer, the method comprising at least: a step of sending solvent, at a pressure P1, to the cartridge (30), by at least a part of the ducts and valves for fluid connection between the ink cartridge (30) and the tank (10), a step of pumping at least a portion of the solvent, sent in step a), towards the main tank (10).

A cleaning filling liquid for inkjet device including water; 10.0% by mass to 45% by mass per whole amount of the cleaning filling liquid of an amide compound having following formula (1). ##STR00001##

A cleaning filling liquid for inkjet device including water; 10.0% by mass to 45% by mass per whole amount of the cleaning filling liquid of an amide compound having following formula (1). ##STR00001##

A liquid ejection head including: an ejection port portion with an ejection port configured to eject liquid in an ejection direction; a pressure chamber that includes therein an energy-generating element to eject the liquid from the ejection port; a supply channel configured to supply the liquid to the pressure chamber; a collecting channel configured to collect the liquid from the pressure chamber; and a pump configured to cause the liquid in the collecting channel to flow into the supply channel, wherein F.sub.ratio is 1.4 or less.

In an ink jet printing method for discharging ink from a liquid discharge head, the ink contains titanium oxide having a precipitation velocity of 1.010.sup.11 m/s or more based on a Stokes equation in the ink, the liquid discharge head comprises a discharge port, a pressure chamber, an energy-generating element for discharging the ink, an upstream flow channel for supplying a liquid to the pressure chamber, a downstream flow channel communicating with the pressure chamber, and a pump communicating with the upstream and downstream flow channels and forming a circulation path in which the ink circulates in an order of the upstream flow channel, pressure chamber, downstream flow channel, and upstream flow channel, and a ratio of the flow rate Q of the ink in the circulation path to the maximum cross-sectional area S of the circulation path, Q/S [m/s], is higher than the precipitation velocity.

There is provided a liquid consuming apparatus including: a tank having a liquid storing chamber, an erected wall through which the liquid inside the liquid storage chamber is visible from outside of the tank, and an inlet which is formed to penetrate through the erected wall and via which the liquid is poured into the liquid storage chamber; a liquid consuming section which consumes the liquid stored in the liquid storing chamber; and a cover. A transmitting section and a checking section are formed in an upper surface, of the cover, under a condition that the cover is in the exposure position, the transmitting section configured to transmit information optically to a user of the liquid consuming apparatus and the checking section configured to prevent the liquid moving on a particular surface of the cover from arriving at the transmitting section.