The printing apparatus includes a support part (platen) configured to support a recording medium (roll sheet), a printing part (printing unit) configured to form an image by discharging ink to a roll sheet supported on a platen while reciprocating in a main scanning direction, and a drying acceleration part configured to accelerate drying of the ink discharged by the printing unit and applied on the roll sheet in a state where the roll sheet is supported on the platen, in which a drying capacity of the drying acceleration part is higher in an end region of the platen than in a central region of the platen in a reciprocation direction of the printing unit.

A liquid ejection head includes a recording element substrate, a flow path member having a common supply flow path and a common collection flow path through which a liquid having a temperature higher than a temperature of the common supply flow path flows, and a support member supporting the flow path member. The common supply flow path and the common collection flow path are formed to extend along a longitudinal direction of the flow path member and be arranged side by side with each other in a lateral direction of the flow path member. The positions of the flow path member in the longitudinal direction and in the lateral direction are defined at a center portion in the longitudinal direction, and at a side surface located on the common supply flow path side in the lateral direction, among side surfaces extending in the longitudinal direction, respectively.

The present disclosure includes a description of an example printhead having multiple ejection dies. The ejection dies are coupled to a temperature sensor and send temperature signals to a controller. The printhead can also include a heater coupled to the ejection dies to apply heat to at least one ejection die.

A fluid propelling apparatus, including a plastic compound, a MEMS at least partially surrounded by the compound, and a heat sink next to the MEMS, to transfer heat away from the MEMS, wherein the heat sink is at least partly surrounded by the compound.

A liquid discharge head includes a channel member and a recording element substrate. The channel member includes a discharge port configured to discharge liquid and at least one channel configured to supply the liquid to the discharge port. The recording element substrate includes a supply path and an energy generating element. The supply path connects to the at least one channel with a connection and is configured to supply the liquid to the at least one channel. The energy generating element is configured to discharge the liquid from the discharge port. The channel member further includes, at positions of the channel member facing the connection, a plurality of spaces, the spaces being formed by covering part of recesses of the channel member with a covering portion, the spaces each including an opening communicating with the at least one channel.

According to one embodiment, a size of an element substrate is reduced, and a printhead using the element substrate can print high-quality image. The multilayer structured element substrate comprises a plurality of print elements, and a circuit configured to input a data signal and a clock signal used for driving the plurality of print elements. And, a print element array formed by arranging the plurality of print elements in line is diagonally arranged with respect to a side constituting an outer shape of the element substrate. A print element at one end of the print element array is a dummy element not contributing to printing. The circuit is provided not only at the same position as that of the dummy element but also in a layer different from that of the dummy element.

A printhead assembly may include a first set of distinct parallel printhead dies in a second set of distinct parallel printhead dies. The first set of distinct parallel printhead dies may have respective major dimensions extending in a longitudinal direction and respective ends that are aligned in a transverse direction. The second set of distinct parallel printhead dies may have respective major dimensions extending in the longitudinal direction and respective ends aligned in the transverse direction. The second set of distinct parallel printhead dies may partially overlap the first set of distinct parallel printhead dies in the transverse direction.

A fluid ejection device may include a fluid ejection die embedded in a moldable material, a number of fluid actuators within the fluid ejection die to recirculate fluid within a number of firing chambers of the fluid ejection die, and a number of cooling channels defined in the moldable material thermally coupled to the fluid ejection die.

A fluid ejection device may include a fluid ejection die embedded in a moldable material, a number of fluid recirculation pumps within the fluid ejection die to recirculate fluid within a number of firing chambers of the fluid ejection die, and a number of heat exchangers thermally coupled to a fluid channel side of the fluid ejection die.

An image forming system includes an image forming unit configured to form a toner image on a recording material; a fixing device configured to fix the toner image on the recording material on which the toner image is formed by the image forming unit; a first cooling unit capable of cooling the recording material passing through the fixing device; a second cooling unit capable of cooling the recording material passing through the first cooling unit; and a control unit configured to carry out control so that during execution of an image forming job, the image forming job is stopped when both the first cooling unit and the second cooling unit are out of order and is continued when only one of the first cooling unit and the second cooling unit is out of order.