A printhead assembly includes: an ink manifold comprised of a first metal; printhead chips mounted on the ink manifold and receiving ink therefrom, each printhead chip having a plurality of bond pads; a PCB mounted on the ink manifold, the PCB having a plurality of contact pads; a plurality of wirebonds interconnecting the bond pads and the contact pads, the wirebonds being comprised of a second metal; an encapsulant material encapsulating the wirebonds, the bond pads and the contact pads; and a voltage source. The ink manifold and the wirebonds are electrically connectable to the voltage source to provide cathodic protection of the wirebonds.

A thread-coating module includes: a coating chamber having a thread entrance at one end and a thread exit at an opposite end thereof; and an inkjet printhead positioned in a printhead opening of the coating chamber for ejecting ink onto thread fed through the coating chamber. The coating chamber has an ink management system positioned opposite the printhead for managing excess ink. The ink management system includes: an inner ink-collection slot in fluid communication with a drain port for recycling excess ink and an outer aerosol-collection chamber fluidically connected to a vacuum port.

A thread-coating module includes: a base plate having a printhead opening; an inkjet printhead received in the printhead opening; and a chamber unit having a mouth for engagement with the base plate and an ink-collection slot opposing the printhead. The chamber unit and the base plate are movable relative to each other for opening and closing a coating chamber comprising the base plate and the chamber unit, with the ink-collection slot being positioned opposite the printhead in the coating chamber.

In a printing apparatus configured to print an image by bidirectional multipass printing while using multiple print element rows that apply color material of the same color, a high-quality image suppressed in hue unevenness and density unevenness is printed. To this end, the printing apparatus forms first and second dot patterns on a print medium in an overlapping manner. In the first dot pattern, dot arrays in which first dot groups are arranged at an interval B1 are arranged in a nozzle arrangement direction while being shifted from each other by C1 in a scanning direction of a print head. In the second dot pattern, dot arrays in which the first dot groups are arranged at the interval B1 are arranged in a nozzle arrangement direction while being shifted from each other by C2 in the scanning direction of the print head. Here, values of C1 and C2 are different.

In a printing apparatus configured to print an image by bidirectional multipass printing while using multiple print element rows that apply color material of the same color, a high-quality image suppressed in hue unevenness and density unevenness is printed. To this end, the printing apparatus forms first and second dot patterns on a print medium in an overlapping manner. In the first dot pattern, dot arrays in which first dot groups are arranged at an interval B1 are arranged in a nozzle arrangement direction while being shifted from each other by C1 in a scanning direction of a print head. In the second dot pattern, dot arrays in which the first dot groups are arranged at the interval B1 are arranged in a nozzle arrangement direction while being shifted from each other by C2 in the scanning direction of the print head. Here, values of C1 and C2 are different.

Provided are an inkjet printing method and an ink set, in which forward and reverse warp inks are printed in an arrangement that reduces warp. The forward warp ink is the ink in which a warp when cured and shrunk by irradiation of light is a forward warp in which a portion on a side where light is irradiated by a light irradiation device is large in the degree of curing and shrinkage as compared with a portion on an opposite side. The reverse warp ink is the ink in which a warp when cured and shrunk by irradiation of light is a reverse warp in which a portion on a side opposite to a side where light is irradiated by the light irradiation device is large in the degree of curing and shrinkage as compared with a portion on the side where light is irradiated.

A printing system includes a printing apparatus providing, in a case a first type of printing material is loaded to a print unit without loading a second type of printing material, a host device with a first printing service using a first identifier to identify the printing apparatus, and in a case where at least the second type of printing material is loaded to the print unit, to provide the host device with a second printing service using a different second identifier. The host device obtains printability information when an identifier provided from the printing apparatus is an unknown identifier, the printability information being information indicating a printable condition with the printing apparatus, sets the printable condition with the printing apparatus based on the obtained printability information, and transmits a printing job based on the set condition to the printing apparatus.

A printing system includes a printing apparatus providing, in a case a first type of printing material is loaded to a print unit without loading a second type of printing material, a host device with a first printing service using a first identifier to identify the printing apparatus, and in a case where at least the second type of printing material is loaded to the print unit, to provide the host device with a second printing service using a different second identifier. The host device obtains printability information when an identifier provided from the printing apparatus is an unknown identifier, the printability information being information indicating a printable condition with the printing apparatus, sets the printable condition with the printing apparatus based on the obtained printability information, and transmits a printing job based on the set condition to the printing apparatus.

An inkjet printer includes an inkjet head having multiple nozzles that eject an ultraviolet-curable ink, an ultraviolet irradiator that cures the ink, a carriage on which the inkjet head and the ultraviolet irradiator are mounted, a carriage drive mechanism that moves the carriage in a main scanning direction, and a controller that controls the ultraviolet irradiator. A part of the ultraviolet irradiator disposed at the same position as the inkjet head in a sub scanning direction is a head position ultraviolet irradiation portion. The controller makes a peak illuminance of ultraviolet with which the head position ultraviolet irradiation portion irradiates the ink when the carriage moves at a moving speed V2 lower than a peak illuminance of ultraviolet with which the head position ultraviolet irradiation portion irradiates the ink when the carriage moves at a moving speed V1, where the moving speed V2 is lower than the moving speed V1.

In a liquid discharging apparatus, a head control unit, which controls an operation of a head unit, includes a first conversion circuit that converts an image signal input from an outside into a first electric signal, a first photoelectric conversion circuit that converts the first electric signal into an optical signal, the head unit, which discharges a liquid, includes a second photoelectric conversion circuit that converts the optical signal into a second electric signal, a second conversion circuit that converts the second electric signal into a discharge control signal for controlling discharge of a liquid. The first conversion circuit performs a first conversion process of converting the image signal into the first electric signal without depending on a discharge information, and the second conversion circuit performs a second conversion process of converting the second electric signal into the discharge control signal by using the discharge information.