A printing device includes a housing, a head arranged inside the housing and configured to eject a liquid, a fan arranged inside the housing, a humidifier configured to supply humidified air to a supply port arranged at an exhaust port side of the fan, and a filter arranged at a fan side of the supply port.

Provided are a liquid jetting head and a liquid jetting device that prevent contamination of a humidity sensor. The liquid jetting head and the liquid jetting device include a nozzle that jets a liquid; a humidity sensor that is disposed further inside than the nozzle face where the nozzle is disposed; an air intake port that is disposed on the same plane as the nozzle face; a connection passage that allows the air intake port and the humidity sensor to communicate with each other; and a contamination preventing part that prevents contamination of the humidity sensor.

A liquid discharge device includes a liquid discharge head including a plurality of liquid chambers respectively communicating with a plurality of nozzles and circulating liquid therethrough. Each liquid chamber is provided with a pressure generator for discharging the liquid from a corresponding nozzle. The liquid discharge device further includes a waveform data memory to store drive waveform data including discharge drive waveform data for discharging the liquid according to image data and micro-vibration drive waveform data for causing a micro vibration of a meniscus of the liquid discharge head. The liquid discharge device further includes circuitry configured to generate a drive waveform based on the drive waveform data; apply, to the pressure generator, a discharge drive waveform based on the discharge drive waveform data, in a printing area; and apply, to the pressure generator, a micro-vibration drive waveform based on the micro-vibration drive waveform data, in a non-print area.

A liquid ejecting head includes: a piezoelectric element that includes a first drive electrode, a piezoelectric body, and a second drive electrode in a lamination direction; a vibration plate that is provided on one side of the lamination direction with respect to the piezoelectric element and is deformed by driving of the piezoelectric element; a pressure chamber substrate that is provided on the one side of the lamination direction with respect to the vibration plate and is provided with a plurality of pressure chambers; an interlayer that is laminated on at least one of the piezoelectric body, the vibration plate, or the pressure chamber substrate and of which resistance changes according to humidity; a first detection electrode that is in contact with the interlayer; and a second detection electrode that is in contact with the interlayer and faces the first detection electrode.

A liquid ejecting head includes: a wiring substrate; a plurality of pressure chambers that accommodate a liquid and communicate with nozzles; a drive element that is electrically coupled to the wiring substrate and changes a pressure in the pressure chamber; and a humidity detection section that is electrically coupled to the wiring substrate and is disposed for detection of humidity.

A liquid ejecting head includes: a piezoelectric element that includes a first drive electrode, a second drive electrode, and a piezoelectric body, the piezoelectric body being provided between the first drive electrode and the second drive electrode in a lamination direction; a pressure chamber substrate that is provided on the one side of the lamination direction with respect to the vibration plate; and detection electrodes that acquire information on humidity and include a first detection electrode in contact with a protective film and a second detection electrode in contact with the protective film at a position separated from the first detection electrode.

A printing apparatus includes: a carriage configured to cause a printing head to scan, the printing head having a nozzle configured to eject a liquid; a first cap disposed at one end of a range in which the carriage moves and configured to cap the nozzle; a second cap disposed at the other end of the range in which the carriage moves and configured to cap the nozzle; and a control unit configured to be capable of executing a first control in which the nozzle is capped by the first cap and a second control in which the nozzle is capped by the second cap, in a case where the carriage has anomalously stopped during printing using the printing head.

An information processing system includes a storage portion that stores a learned model obtained by performing machine learning on a maintenance condition for a print head based on a data set in which nozzle surface image information obtained by photographing a nozzle plate surface of the print head and maintenance information representing necessity of maintenance of the print head or a recommended execution timing of the maintenance are associated with each other, an acquisition portion that acquires the nozzle surface image information, and a processing portion that outputs the maintenance information based on the nozzle surface image information and the learned model at a timing before a discharge defect of the print head occurs.

A printing head assembly with integrated purge mechanism is disclosed. The printing head assembly comprises: (a) a liquid dispensing head comprising one or more dispensing nozzles enclosed in a nozzle plate, driven by at least first and second pressures, and (b) a shielding mask including an opening in front of the one or more nozzles, wherein the opening being configured such that when printing liquid is dispensed from the head driven by the first pressure, the liquid being dispensed in pulses through the opening in the shielding mask, and (ii) when purge printing liquid is dispensed from the head driven by the second pressure, the liquid being drawn to a capillary gap formed between the shielding mask and the nozzle plate thereby removing the purge printing liquid from the nearby nozzles.

An ink jet system includes a recording apparatus with a head unit that ejects ink, a processing apparatus that performs data processing for causing the recording apparatus to perform a recording operation, and a server connectable to either the recording apparatus or the processing apparatus. A first storage unit is disposed in either the recording apparatus or the processing apparatus. A second storage unit is disposed in the server. An acquiring section acquires first data during the recording operation, an accepting section accepts first selection information indicating a result of having a user select any one or more of the first storage unit and the second storage unit to store the first data, and a storing section that stores the first data to the selected one or more of the first storage unit and the second storage unit based on the first selection information.