In order that the interior of a cap member, in a case where the cap member abuts to a cover member, is allowed to have improved airtightness so that the cap member can sufficiently function, a sealing member is used to seal between the cover member and first and second flow path members for retaining the cover member.

Provided are a printing device and a print element substrate having a detection element row provided in correspondence to an ejection port row and capable of suppressing an increase in a length in an ejection port row direction. For that purpose, a row selection circuit 117 is provided in a detection element circuit 108, and a row of the detection element circuit is selected by row selection signals A0 and A1 transmitted through a common wiring.

A print element substrate and a liquid ejection head capable of suppressing degradation of a print quality caused by a white stripe/black stripe etc., is actualized without using a high degree of microfabrication technology. As a result of asymmetric deformation by swelling in a direction of relative movement to a print medium, print elements having different liquid droplet ejection directions are made to coexist and arrayed for that purpose.

A plurality of element arrays are formed between a first terminal array and a second terminal array by a plurality of elements. An element array positioned closer to the second terminal array than to the first terminal array is connected to the second terminal array. An element array positioned closer to the first terminal array than to the second terminal array is connected to the first terminal array.

A liquid discharge device to perform recording by use of a liquid discharge head including discharge ports to discharge a liquid, pressure generation elements to generate energy to be used to discharge the liquid, and pressure chambers communicating with the discharge ports. The liquid discharge device includes: a control unit to control a temperature of the liquid discharge head by applying heat with heating elements arranged in divided areas of a region of the liquid discharge head where the discharge ports are arranged. When there is recording data for the discharge port in a certain one of the divided areas, the control unit causes the heating element in the divided area to generate heat, and when there is no recording data for the discharge port in the certain divided area, the control unit keeps the heating element in the certain divided area from generating heat.

A plurality of head chips including: a nozzle plate having a plurality of nozzles configured to eject a liquid in a first direction, and a case having one or more first flow paths communicating with at least a part of the plurality of nozzles; a holder to which the plurality of head chips are fixed, which includes metal or ceramics, and which has a plurality of second flow paths communicating with at least one of the plurality of first flow paths; and a heater configured to heat the holder.

There is provided a liquid ejecting head which is long in a first direction and short in a second direction, including: a first introduction section; a second introduction section; a first filter chamber group having a first filter chamber and a second filter chamber; a second filter chamber group having a third filter chamber and a fourth filter chamber; a first supply flow path for supplying the liquid from the first introduction section to the first filter chamber group; and a second supply flow path for supplying the liquid from the second introduction section to the second filter chamber group, in which the first introduction section, the second introduction section, the first filter chamber group, and the second filter chamber group are arranged side by side in this order in the first direction.

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 fixed printhead keying feature which is rotationally asymmetric about the print axis notwithstanding the rotational symmetry of the printhead; a cradle for removably receiving the printhead, the cradle having a key assembly for complementary engagement with the fixed printhead keying feature. The key assembly is selectively configurable in either one of first and second cradle configurations so as to receive the printhead either in a first printhead orientation or a second printhead orientation, the second printhead orientation being rotated 180 degrees about the print axis relative to the first printhead orientation.

A liquid ejecting apparatus includes: a liquid ejecting head including an ejecting surface configured to eject a liquid; a tank that reserves the liquid to be supplied to the liquid ejecting head; a circulating mechanism that executes a circulating operation to circulate the liquid between the liquid ejecting head and the tank; and a control unit that controls the circulating mechanism. The control unit executes a recording operation by the liquid ejecting head in a first posture in which the ejecting surface crosses a horizontal plane and executes the circulating operation in a second posture in which an angle made by the ejecting surface and the horizontal plane is smaller than the angle in the first posture.

A liquid discharge head includes a flow passage member and a plurality of pressurizing sections. The flow passage member includes a plurality of discharge holes, a plurality of pressurizing chambers respectively connected to a plurality of the discharge holes, a plurality of first flow passages respectively connected to a plurality of the pressurizing chambers, a second flow passage commonly connected to a plurality of the first flow passages, a plurality of third flow passages respectively connected to a plurality of the pressurizing chambers, and a fourth flow passage commonly connected to a plurality of the third flow passages. A plurality of the pressurizing sections respectively pressurizes liquid in a plurality of the pressurizing chambers. A flow passage resistance in the third flow passages is lower than a flow passage resistance in the first flow passages. In the flow passage member, a damper is formed in the fourth flow passage.