Disclosed is a print head cleaning device for a 3D printer configured to build a component in layers by means of binder jetting, the print head cleaning device comprising a cleaning agent feeding device having an elongated output opening and configured to output liquid cleaning agent through the elongated output opening, and a suction device having an elongated suction gap and configured to suction fluid through the elongated suction gap, wherein a longitudinal axis of the elongated output opening and a longitudinal axis of the elongated suction gap are arranged at an angle to each other.

A printing device includes a printing portion, a maintenance portion, and a controller. The printing portion includes an ejection head and prints using ink. The maintenance portion performs maintenance on the ejection head. The maintenance involves consumption of ink. The controller has a manual maintenance mode and an automated maintenance mode. In the manual maintenance mode, the controller executes a maintenance using the maintenance portion in response to a maintenance command signal based on a manual operation. In the automated maintenance mode, the controller automatically executes a maintenance using the maintenance portion in response to a maintenance execution condition being met. Based on control information acquired, the controller switches an operating mode of the printing device from a first operating mode of selectively executing the manual maintenance mode and the automated maintenance mode to a second operation mode of executing the automated maintenance mode without executing the manual maintenance mode.

A maintenance device configured to maintain a head configured to discharge a first liquid, the maintenance device includes a cap configured to contact a nozzle surface of the head, a storage configured to store a second liquid to be supplied into the cap, a supply device configured to supply the second liquid into the cap, a receptacle configured to receive the second liquid supplied into and overflown from the cap, and a collection device configured to collect the second liquid received by the receptacle.

An inkjet printing device and an operation method of the inkjet printing device are provided. The inkjet printing device includes a printing sprayer head, the printing sprayer head includes a nozzle and a cleaner component, the cleaner device includes a cleaner and a vacuum system, the cleaner is configured to be communicated with the nozzle, and the cleaner is communicated with the vacuum system.

DOD ink delivery systems and methods are described herein that are used in DOD card printing systems of card processing systems for supplying ink for DOD printing on plastic cards of the type that bear personalized data unique to the intended cardholder and/or which bear other card information. The DOD ink delivery system is configured to recirculate the ink, or have a second pressure damper container that provides damping to eliminate large and abrupt spikes in ink pressure which can disturb the meniscus of the ink in each nozzle of the print head generated by a vacuum system, or simultaneously operate a supply pump at a lower flow rate than a return pump during an autofill/autodrain procedure on the ink delivery system.

An ink jet recording apparatus performs a recording operation by ejecting ink from a recording head. The apparatus includes a first absorber configured to absorb ink, a second absorber disposed apart from the first absorber having a larger ink absorption capacity than the first absorber, and a flow path portion that does not absorb ink. The second absorber has a second lower end portion arranged below a first lower end portion of the first absorber. The flow path portion connects the first lower end portion and a portion of the second absorber below the first lower end portion. As a result, ink is prevented from overflowing from the absorbers, even if an apparatus is arranged at an angle.

There is provided a printing apparatus. A cap caps an ink ejection surface of a printhead. An ink suction path is connected to the cap and sucks the ink in the cap. An ink tank stores the ink to be supplied to the printhead. An ink supply path connects the printhead to the ink tank. A first closing unit closes the ink suction path. A second closing unit closes the ink supply path. A control unit is able to execute a first control mode in which the first closing unit closes the ink suction path and a second control mode in which the second closing unit closes the ink supply path.

A liquid ejection apparatus includes a liquid ejection head having a nozzle surface with a plurality of nozzles, a conductive member configured to face the nozzle surface, a cap having a recess in which the conductive member is accommodated, a substrate including a signal output circuit, a controller configured to determine an ejection state of a nozzle based on a signal output from the signal output circuit, a waste liquid tank having an inlet, and a discharge mechanism configured to discharge liquid from the cap through the inlet into the waste liquid ink. The substrate is disposed above the inlet of the waste liquid tank.

There is provided print apparatus including: piezoelectric member; individual electrode; first and second common electrodes; voltage application circuit; detection circuit configured to detect a capacitance of a first capacitor configured by the piezoelectric member, the individual electrode, and the first common electrode and a second capacitor configured by the piezoelectric member, the individual electrode, and the second common electrode; first switching element; and control circuit. The control circuit is configured to execute; a first voltage application process to apply a first voltage to the second common electrode in order to discharge the ink; a detection process to detect the capacitance after electrically connecting the piezoelectric member and the detection circuit with the first switching element; and a second voltage application process to apply a second voltage to the second common electrode before the detection process, the second voltage being lower than the first voltage.

A liquid discharge device includes a discharge unit configured to discharge liquid, a maintenance unit configured to cause the discharge unit to eject liquid to perform maintenance of the discharge unit, and a control unit configured to cause the maintenance unit to perform the maintenance periodically, wherein when performing the maintenance, the control unit performs first maintenance in a case in which a consumption amount of the liquid consumed after the maintenance previously performed is greater than or equal to a first threshold value, and performs second maintenance stronger than the first maintenance in a case in which the consumption amount is less than the first threshold value.