An ink jet recording apparatus includes a recording head, a blade, and a cleaning liquid dispensing unit. The recording head includes a nozzle surface including a plurality of nozzles each having an ink outlet oriented downward, and is supported so as to move in an up-down direction. The blade wipes the nozzle surface, by moving in a predetermined moving direction in contact with the nozzle surface. The cleaning liquid dispensing unit stores therein cleaning liquid supplied from a cleaning liquid supply source, and supplies the cleaning liquid between a travel start position of the blade and the nozzle surface. The cleaning liquid dispensing unit includes a receptacle in which the cleaning liquid that has been supplied is stored, the receptacle having a top face open upward.

An inkjet recording apparatus includes an inkjet head, a dipping vessel, a lifting device and a removing device. The dipping vessel stores a cleaning liquid. The lifting device dips a nozzle surface of the inkjet head in the cleaning liquid by lifting or lowering the dipping vessel or the inkjet head. The removing device is provided in the dipping vessel and removes adhered material from the nozzle surface.

A liquid ejecting apparatus includes: a head having a nozzle surface with a nozzle, and an actuator causing liquid to be ejected from the nozzle; a wiper; a cleaner; a first moving mechanism moving the nozzle surface and the wiper relatively; a second moving mechanism moving the wiper and the cleaner relatively; and a controller. The controller executes: a first ejecting process of ejecting the liquid from the nozzle to a medium; a wiping process of wiping the nozzle surface by driving the first moving mechanism to move the wiper and the nozzle surface relatively in a direction parallel to the nozzle surface with the wiper and the nozzle surface being in contact with each other; and a cleaning process of cleaning the wiper by driving the second moving mechanism to move the wiper and the cleaner relatively and bring the wiper and the cleaner into contact with each other.

A liquid droplet ejection apparatus includes an image former that ejects a liquid droplet from a nozzle of a liquid droplet ejection head onto a recording medium conveyed, thereby recording an image thereon, a head cleaning device that cleans a nozzle face of the liquid droplet ejection head, and a hardware processor that controls a cleaning operation of the head cleaning device in accordance with information on an amount of charge on the recording medium.

The invention concerns a cleaning system adapted to clean the outer surface of a roller of a coating machine adapted to coat and/or print and/or shape a layer on a web, the cleaning system comprising: a robotic arm comprising an holding organ; a cleaning device held on the holding organ, the cleaning device being adapted to clean the outer surface of the roller; and a command unit adapted to command the robotic arm and the cleaning device to carry out a cleaning task of a part of the outer surface, wherein the command unit is further adapted to receive at least one defect property and to trigger a cleaning task in accordance with each received defect property, a defect property being a property of at least one defect of the layer.

A liquid discharge device includes a support unit configured to support a medium, a liquid discharge unit configured to discharge liquid in a discharge direction from a nozzle provided at a nozzle surface onto the medium supported by the support unit, and a moving unit configured to move in a first direction that is a direction intersecting the discharge direction and in a second direction that is a direction opposite to the first direction. The moving unit includes a scraping member configured to scrape off paper dust accumulated below the support unit.

A transport device including a transporting belt that includes a medium-supportable outer circumferential surface and transports the medium, a cleaning roller capable of cleaning the outer circumferential surface, a storage unit that stores a cleaning liquid supplied to the outer circumferential surface via the cleaning roller, a discharge port through which the cleaning liquid is dischargeable, a flow path pipe through which the discharged cleaning liquid is passable, a pump that changes an internal pressure of the flow path pipe to cause the cleaning liquid to flow so that the cleaning liquid stored in the storage unit is discharged from the storage unit through the discharge port and the flow path pipe, a sensor capable of detecting the internal pressure of the flow path pipe, and a control unit that determines a state of the cleaning liquid stored in the storage unit based on a detection result of the sensor.

A doctor (20), in particular for printing cylinders and coating systems, includes a doctor edge (21), a doctor body (22), and a curved blade profile (25) which is formed between the doctor edge (21) and the doctor body (22). In order to produce a doctor (20) which reduces the maintenance requirements of a gravure, flexographic, offset and/or digital printing machine and increases the service life of a doctor (20), according to the invention the extension of the curved blade profile (25) from the doctor edge (21) to the doctor body (22) is square or cuboid and/or the extension of the curved blade profile (25) from the doctor edge (21) to the doctor body (22) has at least one turning point (26).

A technique capable of increasing cleanability. Included are a printing unit configured to eject a printing liquid from a nozzle to perform printing and a maintenance unit configured to wipe a nozzle surface on which the nozzle is formed in the printing unit to remove a deposit deposited on the nozzle surface. The maintenance unit includes a first wiping portion configured to give a first wipe with a first blade made of an elastic material and a second wiping portion configured to give a second wipe with a second blade made of an elastic material different from that of the first blade, and the second blade has a hardness lower than that of the first blade and is formed thicker than the first blade.

A maintenance device includes a blade unit, a support, and a blade sliding device. The blade unit includes a blade in contact with a nozzle surface of an inkjet head. To the support, the blade unit is detachably attached. The blade sliding device slides the support to a predetermined moving direction along the nozzle surface. The blade unit has a through-hole penetrating in an upper-and-lower direction. The support has a projection portion which is engaged with the through-hole. The projection portion protrudes upward and is inclined with respect to a vertical direction.