Printheads and methods for forming printheads are described herein. In one example, a printhead includes a number of drop generators, wherein a pitch between each adjacent drop generator is substantially the same, and the drop generators alternate between a high drop weight (HDW) drop generator and a low drop weight (LDW) drop generator. The printhead also includes a flow channel from an ink source leading into an ejection chamber associated with each drop generator, wherein the flow channel comprises an inflow region proximate to the ink source, wherein an area of the inflow region is adjusted to control the flux of ink into the ejection chamber.

A recording device includes a head including a plurality of nozzles discharging ink droplets and a head including a plurality of nozzles discharging ink droplets of a color identical to that of the ink droplets, a driving circuit configured to drive the former head at a drive voltage and drive the latter head by another drive voltage, an input unit configured to receive an input of selection information selected, based on comparison between a print image printed by the former head and a plurality of other print images G2 printed by the latter head, with the other drive voltage being changed individually, and a control unit configured to control the drive voltage and the other drive voltage, based on the selection information input from the input unit.

In some examples, a fluid ejection device includes a support body, a multi-die assembly, and a fluid channel that extends through the support body from a first side to a second side adjacent the multi-die assembly. The multi-die assembly includes a plurality of fluid ejection dies to receive fluid from the fluid channel, where a first fluid ejection die of the plurality of fluid ejection dies is to dispense fluid of a first drop size, and a second fluid ejection die of the plurality of fluid ejection dies is to dispense fluid of a second drop size different from the first drop size.

An object is to provide a liquid ejecting apparatus that enables a liquid storage container to be properly and easily refilled with a liquid from a liquid refilling container without causing color mixture in the liquid storage container. The liquid ejecting apparatus includes liquid storage containers each configured to feed the liquid to a liquid ejecting portion and liquid refilling containers each configured to refill the liquid storage container with the liquid. A first fitting unit is provided around a liquid injection port in each of the liquid storage containers. A second fitting unit is provided around a liquid pour-out port in each of the liquid refilling containers. The second fitting unit is fitted to the first fitting unit to enable the liquid to be delivered from the liquid pour-out port to the liquid injection port.

A liquid ejection head includes an ejection hole surface where a plurality of nozzles ejecting liquid open. The ejection hole surface includes a nozzle arrangement region where the plurality of nozzles are arranged. Each nozzle includes an inversely tapered part where a cross-sectional area increases toward the ejection hole surface. A first nozzle is arranged at a center part of a predetermined direction of the nozzle arrangement region, while second nozzles are arranged at the end parts at the two sides in the predetermined direction. When viewed from the ejection hole surface side as T, the width of the first nozzle's inversely tapered part is larger than the widths of the inversely tapered parts of the second nozzles. In the nozzle arrangement region, the ejection hole surface includes a shape that the center part in the predetermined direction projects with respect to the end parts on the two sides.

Printheads and printers are described herein. In one example, a printhead includes a number of drop generators disposed in a first array and a second array. The drop generators in both the first array and the second array are spaced one dot pitch apart perpendicular to the motion of a print medium, and alternate between a high drop weight (HDW) drop generator and a low drop weight (LDW) drop generator. Each drop generator in the first array is in a line of the motion of the print medium with a corresponding drop generator in the second array, wherein each HDW drop generator in the first array is in line with an LDW drop generator in the second array, and each LDW drop generator in the first array is in line with an HDW drop generator in the second array.

A liquid droplet discharging apparatus includes: a channel member having a channel including a nozzle and a pressure chamber communicating with the nozzle; and a piezoelectric element fixed to the channel member and configured to apply pressure to liquid inside the pressure chamber to discharge liquid droplets of the liquid from the nozzle. A natural frequency Fr of the liquid inside the channel is in a range of 120 kHz to 160 kHz, a recording resolution which is a resolution of an image to be recorded by the liquid droplets is not less than 1200 dpi; and a diameter D [?m] of the nozzle and the natural frequency Fr [KHz] satisfy: D?0.0343?Fr+6.6979.

An inkjet recording apparatus includes a recording head including a first discharge port configured to discharge a first amount of ink droplets and a second discharge port configured to discharge a second amount of ink droplets smaller than the first amount, a cap, a suction unit, and a determination unit configured to determine whether to perform a first recording operation by using the first and second discharge ports or a second recording operation by only using the first discharge port. If the first recording operation is determined to be performed, the suction unit performs a first suction operation with a first strength and a second suction operation with a second strength higher than the first strength. If the second recording operation is determined to be performed, the suction unit is controlled not to perform the second suction operation and to perform the first suction operation.

Printheads and printers are described herein. In one example, a printhead includes a number of drop generators disposed in a first array and a second array. The drop generators in both the first array and the second array are spaced one dot pitch apart perpendicular to the motion of a print medium, and alternate between a high drop weight (HDW) drop generator and a low drop weight (LDW) drop generator. Each drop generator in the first array is in a line of the motion of the print medium with a corresponding drop generator in the second array, wherein each HDW drop generator in the first array is in line with an LDW drop generator in the second array, and each LDW drop generator in the first array is in line with an HDW drop generator in the second array.

A fluidic die may include a number of actuators. The number of actuators form a number of primitives. The fluidic die may include a digital-to-analog converter (DAC) to drive a number of the delay circuits. The delay circuits delay a number of activation pulses that activate the actuators associated with the primitives to reduce peak power demands of the fluidic die. A number of delay circuits may be coupled to each primitive.