A method of configuring an orientation-agnostic inkjet print module for use in either one of first or second module orientations relative to a media path, the second module orientation being rotated 180 degrees relative to the first module orientation. The method includes the steps of: configuring a key assembly to correspond with either one of the first or second module orientations, the key assembly determining a printhead orientation of a respective printhead relative to the inkjet print module; and configuring a switch to correspond with either one of the first or second module orientations, the switch being operably connected to controller circuitry distributing data signals to the printhead via first and second data paths. The switch inverts distribution of the data signals between the first and second data paths.

An inkjet print module includes: a printhead having first and second rows of print chips, the printhead having 180 degree rotational symmetry about a print axis parallel to a direction of droplet ejection; a cradle for removably receiving the printhead; and control circuitry for distributing data signals to the printhead via first and second data paths of the inkjet print module. The cradle is configurable for receiving the printhead in first and second printhead orientations relative to the print module, the second printhead orientation being rotated 180 degrees about the print axis relative to the first printhead orientation. The control circuitry is configurable to invert distribution of the data signals between the first and second data paths.

A method of single-pass printing uses a printing system having first and second aligned printheads supplied with a same ink. The method includes the steps of: receiving first and second halftone images at the first and second printheads, respectively; printing the first halftone image from the first printhead; and printing the second halftone image from the second printhead. The first halftone image is based on a first dither pattern and the second halftone image is based on a second dither pattern, the first dither pattern being different than the second dither pattern.

A method of printing includes applying a processing fluid to a substrate and inkjet discharging a white ink to the substrate onto which the processing fluid has been applied, wherein the processing fluid contains a tri-valent metal salt, a nonionic urethane resin, and water and the white ink contains a white pigment, a resin, and water.

A liquid ejection head 2 in the present disclosure is provided with a first channel member 4 including a first surface 4-1, a plurality of ejection ports in the first surface, a plurality of pressurizing chambers which are individually communicated with the plurality of ejection ports, and a second surface 4-2 on the opposite side to the first surface 4-1; with a pressurizing member on the second surface 4-2; and with a second channel member 6 including a third surface 6-3, a fourth surface 6-4 on the opposite side to the third surface 6-3, a raised part 6e which protrudes from the fourth surface, and a first through hole 6a in the raised part 6e. The second channel member 6 is provided on a region in the second surface 4-2 of the first channel member 4, in which the pressurizing member is not arranged. When viewed on a plane, an outer circumference 7a of the raised part is located on inner side from an outer circumference 7b of the fourth surface 6-4.

A liquid discharge head is provided which comprises a head body, a casing and a thermal insulator. The head body comprises a surface having one or more holes configured to discharge liquids therethrough. The casing, disposed on the head body, comprises a heat generator configured to generate heat and a heat sink configured to dissipate the heat. The thermal insulator is between the heat sink and the head body.

A liquid ejection head includes a liquid channel through which a first liquid and a second liquid flow, a pressure generation element that pressurizes the first liquid and an ejection orifice through which to eject the second liquid in a direction crossing a direction of the flow of the first liquid and the second liquid via the pressurization. A distance in the direction of the flow from a position in the liquid channel at which the first liquid and the second liquid merge to the ejection orifice is greater than an interface stabilization distance in the direction of the flow from a position at which the first liquid and the second liquid contact each other to a position at which a stable interface is obtained between the first liquid and the second liquid.

A printing apparatus includes: power supply circuits including at least first and second power supply circuits; a head including nozzles, the nozzles forming groups arranged in a first direction, each of the groups including nozzle arrays arranged in the first direction, each of the nozzle arrays extending in a second direction intersecting with the first direction, and each of the nozzles being associated with any of the power supply circuits; and a memory storing information. The information indicates correspondence relationships between the nozzles and the power supply circuits, between the nozzles and the groups, and between the nozzles and the nozzle arrays. Printing is performed by driving the head based on the information. The groups include a first group and a second group adjacent to each other in the first direction. The first group includes a first nozzle array adjacent to the second group in the first direction.

A recording device includes a transportation path that transports a medium, a recording portion configured to move with respect to the transportation path in a direction intersecting with a recording surface of the medium, a moving mechanism that moves the recording portion, and a motor that causes the recording portion to move, and the moving mechanism includes a first member on which a first rack is formed in a moving direction of the recording portion, a first pinion gear that is engaged with the first rack, a second rack that is provided at a position facing the first rack in the recording portion, formed in the moving direction, and engaged with the first pinion gear, and a second member in which the first pinion gear is rotatably provided that is configured to move in the moving direction by receiving the power of the motor.

A liquid ejection head includes an ejection opening; a passage in which an energy generation element is disposed; an ejection opening portion that allows communication between the ejection opening and the passage; a supply passage for allowing the liquid to flow into the passage; and an outflow passage for allowing the liquid to flow out to the outside. An expression of H.sup.−0.34×P.sup.−0.66×W>1.7 is satisfied when a height of the passage is set to H [μm], a length of the ejection opening portion is set to P [μm], and a length of the ejection opening portion is set to W [μm].