An ink jet head includes a pressure chamber, a main flow path, an actuator, a nozzle, a first communication flow path, and a filter. The pressure chamber is filled with an ink. The main flow path supplies the ink to the pressure chamber. The actuator changes the pressure of the ink filled in the pressure chamber. The nozzle is connected to the pressure chamber and ejects the ink filled in the pressure chamber by driving of the actuator. The first communication flow path connects the pressure chamber to the main flow path. The filter is disposed at a predetermined position between the nozzle and the vicinity of a first boundary of the main flow path and the first communication flow path, and the filter captures an impurity in the ink which has a size larger than the diameter of the nozzle.

A liquid ejection head includes a nozzle surface having a plurality of nozzles, a channel structure stacked on the nozzle surface in a stacking direction, and a supply channel structure formed of a material having a lower thermal conductivity than a material of the channel structure. The channel structure has a liquid ejection channel communicating with the nozzles. The supply channel structure has a supply channel communicating with the liquid ejection channel. The supply channel structure has a covering portion covering at least a portion of an end surface on a side of the channel structure in a width direction orthogonal to the stacking direction.

A liquid ejection head includes a nozzle surface having a plurality of nozzles, a channel structure stacked on the nozzle surface in a stacking direction, and a supply channel structure formed of a material having a lower thermal conductivity than a material of the channel structure. The channel structure has a liquid ejection channel communicating with the nozzles. The supply channel structure has a supply channel communicating with the liquid ejection channel. The supply channel structure has a covering portion covering at least a portion of an end surface on a side of the channel structure in a width direction orthogonal to the stacking direction.

A liquid ejecting head includes a plurality of actuators, a plurality of pressure chambers that are provided so as to correspond to the actuators, and communicate with a common liquid chamber, a first member that defines the common liquid chamber, and includes a compliance sheet that absorbs vibrations of liquid on an upstream side of the common liquid chamber, and an inlet that is formed so as to penetrate the compliance sheet, a canopy portion that is provided at an open peripheral edge of the inlet of the first member, and has a receiving surface to which the compliance sheet is joined, and a receiving portion that is provided opposite the inlet across the canopy portion, and receives liquid introduced from the inlet.

In one example, a container for holding printing fluid includes a chamber to hold a printing fluid and an inelastic, expandable, and contractible bag occupying space in the chamber. The exterior of the bag is exposed to an interior of the chamber and an interior of the bag is sealed against the interior of the chamber and vented to the atmosphere.

In a method of controlling a liquid ejecting apparatus, where the liquid ejecting apparatus includes a pressure chamber that communicates with a nozzle that ejects a liquid, a drive element that changes a pressure of the liquid in the pressure chamber, and a drive circuit that supplies the drive element with an ejection pulse that generates a change in the pressure that ejects the liquid from the nozzle, the method includes specifying a viscosity of the liquid in the nozzle and a surface tension of the liquid in the nozzle from a residual vibration when the pressure of the liquid in the pressure chamber is changed, and controlling a waveform of the ejection pulse according to the viscosity and the surface tension.

In a method of controlling a liquid ejecting apparatus, where the liquid ejecting apparatus includes a pressure chamber that communicates with a nozzle that ejects a liquid, a drive element that changes a pressure of the liquid in the pressure chamber, and a drive circuit that supplies the drive element with an ejection pulse that generates a change in the pressure that ejects the liquid from the nozzle, the method includes specifying a viscosity of the liquid in the nozzle and a surface tension of the liquid in the nozzle from a residual vibration when the pressure of the liquid in the pressure chamber is changed, and controlling a waveform of the ejection pulse according to the viscosity and the surface tension.

A liquid ejection head that includes ejection orifices and is configured by bonding a silicon substrate and a support substrate, flow passages which penetrate a bonding surface between the silicon substrate and the support substrate and through which different types of liquids flow. An in-partition wall space that is open to the bonding surface between the silicon substrate and the support substrate is formed in a partition wall for separating the flow passages. The internal pressure of the in-partition wall space is set to be lower than pressure of the liquid on each of the flow passages.

According to one or more embodiments, a liquid discharge head comprises a substrate, a nozzle plate, and a damper member. The substrate comprises a plurality of pressure chambers. The nozzle plate is provided on a first surface of the substrate and comprises a plurality of nozzles, each of the plurality of nozzles aligned with a corresponding one of the plurality of pressure chambers. The damper member is provided on a second surface of the substrate and comprises a pressure wave absorbing material.

According to one or more embodiments, a liquid discharge head comprises a substrate, a nozzle plate, and a damper member. The substrate comprises a plurality of pressure chambers. The nozzle plate is provided on a first surface of the substrate and comprises a plurality of nozzles, each of the plurality of nozzles aligned with a corresponding one of the plurality of pressure chambers. The damper member is provided on a second surface of the substrate and comprises a pressure wave absorbing material.