A print head includes a substrate having a hole, a circuit on the substrate, the circuit having traces and a hole corresponding to the hole in the substrate, the hole forming a fluid path, and a raised structure on the substrate around the fluid path, the raised structure positioned to seal the circuit from the fluid path.

A print head includes a substrate having a hole, a circuit on the substrate, the circuit having traces and a hole corresponding to the hole in the substrate, the hole forming a fluid path, and a raised structure on the substrate around the fluid path, the raised structure positioned to seal the circuit from the fluid path.

The disclosure relates to a method and apparatus for preventing oxidation or contamination during a circuit printing operation. The circuit printing operation can be directed to OLED-type printing. In an exemplary embodiment, the printing process is conducted at a load-locked printer housing having one or more of chambers. Each chamber is partitioned from the other chambers by physical gates or fluidic curtains. A controller coordinates transportation of a substrate through the system and purges the system by timely opening appropriate gates. The controller may also control the printing operation by energizing the print-head at a time when the substrate is positioned substantially thereunder.

The disclosure relates to a method and apparatus for preventing oxidation or contamination during a circuit printing operation. The circuit printing operation can be directed to OLED-type printing. In an exemplary embodiment, the printing process is conducted at a load-locked printer housing having one or more of chambers. Each chamber is partitioned from the other chambers by physical gates or fluidic curtains. A controller coordinates transportation of a substrate through the system and purges the system by timely opening appropriate gates. The controller may also control the printing operation by energizing the print-head at a time when the substrate is positioned substantially thereunder.

A liquid discharge apparatus includes: a head having a nozzle surface having nozzles to discharge a liquid; a head temperature adjuster to adjust head temperature of the head; a temperature sensor to detect: an indoor temperature; or a nozzle surface temperature around the nozzle surface; and circuitry configured to control the head temperature adjuster to adjust the head temperature based on the indoor temperature or the nozzle surface temperature detected by the temperature sensor.

Provided is a recording device including a driving unit of heaters; and temperature sensors disposed corresponding to the heaters respectively. A first drive signal and a second drive signal, of which heating of the heater is different from the first drive signal, are consecutively applied to a heater corresponding to a nozzle to be determined. Whether the nozzle to be determined is in a state of normally ejecting the liquid is determined based on a change rate of an output of the temperature sensor corresponding to the nozzle to be determined acquired when applying the first drive signal and a change rate thereof acquired when applying the second drive signal. During an interval between the first drive signal and the second drive signal, a drive signal is not applied to heaters corresponding to the nozzles other than the nozzle to be determined.

An inkjet nozzle device includes a main chamber having a floor, a roof and a perimeter wall extending between the floor and the roof. The main chamber includes: a firing chamber having a nozzle aperture defined in the roof and a bar heater for ejection of ink through the nozzle aperture; an antechamber for supplying ink to the firing chamber, the antechamber having a chamber inlet defined in the floor; and a baffle plate extending parallel with the bar heater, which partitions the main chamber to define the firing chamber and the antechamber. The nozzle device has mirror symmetry about a symmetry plane extending perpendicular to the longitudinal axes of the bar heater and the baffle plate.

An inkjet nozzle device includes a main chamber having a floor, a roof and a perimeter wall enclosing the main chamber. The main chamber includes: a firing chamber having a nozzle aperture defined in the roof and a bar heater for ejection of ink through the nozzle aperture; an antechamber for supplying ink to the firing chamber, the antechamber having a chamber inlet defined in the floor; and a baffle plate extending parallel with the bar heater, which partitions the main chamber to define the firing chamber and the antechamber. The nozzle device has mirror symmetry about a symmetry plane extending perpendicular to the longitudinal axes of the bar heater and the baffle plate.

A liquid ejection apparatus that can suppress occurrence of condensation in a printing head without causing an increase in size of the apparatus is provided. To this end, a first air flow generation structure is arranged in a position that is not in a conveyance direction with respect to the printing head and arranged so as to be able to blow an air flow to an ejection port surface of the printing head. In addition, a heat source is provided between a first air flow generation unit and the printing head to increase a temperature of the air flow from the first air flow generation structure.

In order to make it less likely for the accuracy of determination of the ejection state of a liquid ejection head to be low, a liquid ejection apparatus sets a determination threshold for determining an ejection state of the liquid ejection head using first energy, the determination threshold being set based on a first output value outputted from the output unit in an event where the heat generating resistance element is driven with the first energy in an ejection state in which the liquid is ejected from an ejection port and a second output value estimated to be outputted from the output unit assuming the heat generating resistance element is driven with the first energy in a non-ejection state in which the liquid is not ejected.