A cleaning process for cleaning at least one part of a hydraulic circuit of a continuous inkjet printer. The hydraulic circuit includes a solvent tank and an ink tank, and hydraulic connections for sending ink and/or solvent to a print head. The cleaning process includes: a preliminary step of flushing or cleaning at least part of the ink or hydraulic circuit; and flowing or circulating the gas, and solvent, through at least one part of the hydraulic circuit and recovering dirty fluid from the at least one part of the hydraulic circuit in a recovery cartridge or in a tank.

A printing apparatus includes a glue belt as an example of a transport belt including a support unit configured to support a medium, the support unit being configured to transport a medium by moving the support unit, a liquid ejecting unit configured to eject liquid onto a medium supported by the support unit, and a dyeing unit configured to perform dyeing by immersing a medium in dyeing liquid. Printing is performed on the medium by combining dyeing by the dyeing unit and ejecting by the liquid ejecting unit.

Some embodiments of a device comprise a cleaning-fluid-supply reservoir; a cleaning-fluid-supply conduit; one or more electrical connectors that are configured to be attached to a printhead and supply electrical signals to the printhead; one or more memories; and one or more processors that are in communication with the one or more memories. Also, the one or more processors cooperate with the one or more memories to cause the device to perform operations that include supplying cleaning fluid from the cleaning-fluid-supply reservoir, through the cleaning-fluid-supply conduit, to the printhead, and while supplying the cleaning fluid to the printhead, sending a signal to the printhead, through the one or more electrical connectors, to activate one or more piezo-electric actuators of the printhead.

A printing platform includes a printing engine with one or more printheads arranged such that the ink drops are jetted vertically upwards against the action of gravity; and a substrate transportation system where the normal to the surface in contact with the substrate is parallel and with opposite direction to the travelling direction of the jetted ink drops. It is necessary to counteract the weight of the substrate during the printing process to avoid it from falling under the action of gravity. This is achieved through any of a mechanical element that interferes with the falling of the substrate and that keeps it in place; or a system that generates adhesion forces between the element that transmits the motion to the substrate, typically a conveyor belt, and the substrate through the action of electrostatic forces, an air pressure differential between both faces of the substrate, or any other suitable mechanism.

The disclosure concerns a printhead for the application of a coating agent to a component, in particular for painting a vehicle body component with a paint. The disclosure provides that the printhead is designed in such a way that it enables a color change during coating operation and can be rinsed with a rinsing agent during a color change in order to rinse out coating agent residues from the printhead.

An inkjet printer has a print assembly and a print material feed system comprising a first circulation circuit and a second circulation circuit, the first circulation circuit fluidly coupled between the second circulation circuit and the print assembly.

The printing apparatus includes: a printing unit configured to perform printing on a fabric based on print data, a transporting belt having a support surface for supporting the fabric and configured to transport the fabric, a cleaning unit configured to clean the support surface with a cleaning liquid, a temperature change unit configured to change a temperature of the cleaning liquid, and a device control unit configured to control the temperature change unit based on at least one of attribute information of the fabric, a position of the fabric on the support surface, and the print data.

The printing apparatus includes: a printing unit configured to perform printing on a fabric based on print data, a transporting belt having a support surface for supporting the fabric and configured to transport the fabric, a cleaning unit configured to clean the support surface with a cleaning liquid, a temperature change unit configured to change a temperature of the cleaning liquid, and a device control unit configured to control the temperature change unit based on at least one of attribute information of the fabric, a position of the fabric on the support surface, and the print data.

A method is provided for cleaning a print head, wherein the print head includes a cavity for the circulation of jets and at least one first spraying nozzle for projecting at least one cleaning fluid towards at least one inner portion of the cavity. The method includes the step of projecting, using the first spraying nozzle, several pulses of cleaning fluid towards the inside of the cavity.

The liquid ejection apparatus includes a liquid ejection head, a cap having a closed space forming section forming a closed space, an inflow port through which a humidification fluid flows in, and an outflow port through which the humidification fluid flows out, a humidification fluid storage section storing the humidification fluid, a supply flow path communicating the humidification fluid storage section with the inflow port, a collection flow path communicating the humidification fluid storage section with the outflow port, a pump, a moisture supply section, and a controller. One end of the collection flow path opens at a position in the humidification fluid storage section that is lower than a liquid surface of the humidification fluid. The controller causes the moisture supply section to supply water into the circulation path and drives the pump to cause the humidification fluid to flow in the circulation path.