A holding portion is held by a main body portion. The holding portion includes at least one recording head, a carriage, a cover portion, and a blowing unit. The recording head is capable of discharging ink. The carriage has a bottom wall portion to which at least one recording head is attached, and accommodates the at least one recording head. A cover portion has a facing surface facing the bottom wall portion. The blowing unit blows an air toward the facing surface so that the air reaches the recording head.

A liquid discharge head includes a recording element substrate including a discharge port. A channel member is configured to supply the recording element substrate with a liquid. An electric wiring board is configured to supply the recording element substrate with power. A plate-like protective member is directly or indirectly fixed to the channel member. In a case where a direction in which the recording element substrate is viewed from the channel member is defined as downward, the protective member includes a first bent portion configured to be bent in a transverse direction of the liquid discharge head. The first bent portion is located at a position that is above an upper end of the channel member and below a midpoint of a line segment connecting the upper end of the channel member and an upper end of the protective member.

A printhead module for a modular pagewide inkjet printhead. The printhead module has only four rows of print chips configured for printing four different inks, each print chip having multiple nozzle rows for redundant monochrome printing of one respective ink. A print zone of the printhead module has a width of less than 100 mm across the four rows of print chips.

A liquid ejecting head includes head chips configured to eject a liquid toward a medium in a first-direction, in which, when a width direction of the medium is a second-direction, a direction orthogonal to the first-direction and the second-direction is a third-direction, and a direction perpendicular to the first-direction and intersecting the second-direction and the third-direction is a fourth-direction, the head chips include a first-chip group in which first head-chips are arranged side by side in the second-direction, the first-head chip having a first-nozzle row formed by arranging first-nozzles side by side in the fourth-direction, and a second-chip group in which second-head chips are arranged side by side in the second-direction, the second-head chip having a second-nozzle row formed by arranging second-nozzles side by side in the fourth-direction, and the first-chip group is arranged side by side in the third-direction with respect to the second-chip group.

Misalignment of printing positions is reduced in a print head that circulates an ink between a printing apparatus and the print head in a case where the misalignment is apt to change dynamically along with heat deformation. To this end, printing element substrates in the print head are adjusted to a target temperature and then a liquid is circulated through the print element substrates. After thermal expansion of the print head reaches a steady state, an amount of misalignment of printing positions in a direction of conveyance of the print head is obtained by using a test pattern printed by using printing elements. Further, a correction value for correcting the misalignment of the printing positions is set based on the obtained amount of misalignment of the printing positions.

A liquid ejecting head configured to eject a liquid in a first direction includes: head units arranged side by side in a second direction orthogonal to the first direction and a flow channel member having a first supply flow channel through which the liquid is supplied to the head units, a first collection flow channel through which the liquid is collected from the head units, a first inlet portion through which the liquid is let into the first supply flow channel from the outside, and a first outlet portion through which the liquid is let out to the outside from the first collection flow channel. The first inlet portion and the first outlet portion are disposed near the center of the flow channel member in the second direction.

Provided is a liquid ejection head comprising a base plate and at least two device chips in which ejection ports for ejecting a liquid are formed and which are disposed on the base plate. At least one first reference mark is provided on the base plate. A second reference mark is provided on each of the device chips. At least one space is formed between adjacent ones of the device chips. The second reference marks and the first reference mark present in the space are disposed on an array axis along which the device chips are arrayed.

A liquid jetting apparatus jetting a liquid onto a recording medium conveyed in a first direction includes head units arranged in a second direction orthogonal to the first direction. One head unit includes nozzle chips; one nozzle chip has a nozzle arrangement area wherein nozzles are aligned in a third direction crossing the first and second directions. The nozzle chip is arranged to be shifted relative to another nozzle chip in a direction crossing the first and second directions and different from the third direction. The head unit has a first overlapping portion wherein nozzle arrangement areas of first and second nozzle chips included in the nozzle chips partially overlap with each other in the first direction. The liquid jetting apparatus has a second overlapping portion wherein nozzle arrangement areas of third and fourth nozzle chips included in the head units partially overlap with each other in the first direction.

A method may include positioning first and second printhead die within a die carrier, using a registration pin of the die carrier to align the first and second printhead die and fixing the position of the first and second printhead die within the die carrier.

A liquid discharge unit includes a liquid discharge head having a first joint portion and configured to discharge a liquid in a first direction, a liquid supply section having a second joint portion joined to the first joint portion to supply the liquid to the liquid discharge head, and disposed in a second direction opposite to the first direction relative to the liquid discharge head, and a support section which is formed together with the liquid discharge head, and to which the liquid discharge head is fixed. With respect to the first direction, a position at which the liquid supply section is fixed to the support section is located in the second direction with respect to a position at which the first joint portion and the second joint portion are joined to each other.