In an example, a printhead maintenance apparatus includes a pump, a current monitor and processing circuitry. The pump may be provided to increase a pressure in a printhead, and the current monitor may monitor a current consumption of the pump. The processing circuitry may determine a rate of change of current consumption of the pump, and compare the rate of change of current consumption to a predetermined threshold.

A liquid ejecting apparatus includes a liquid ejecting unit that ejects liquid, and a plurality of pumps each supplying the liquid toward the liquid ejecting unit by repeating a sucking state and a discharging state. When one of the pumps is in the discharging state and a storage amount of the liquid stored in the pump chamber of the one pump becomes equal to a threshold, another of the pumps is switched to the discharging state. A value obtained by adding an inflow of the liquid flowed into the pump chamber of the other pump to an ejection amount of the liquid ejected from the liquid ejecting unit is defined as a discharge amount of the liquid discharged from the pump chamber of the one pump during a period of the discharging state.

A liquid ejecting apparatus includes: a liquid ejecting section having a nozzle that is configured to eject liquid; a liquid tank that is configured to receive the liquid ejected from the nozzle, and is disposed at a separate position from the liquid ejecting section; a waste liquid containing chamber that stores liquid ejected from the liquid ejecting section or waste liquid generated during a maintenance operation of the liquid ejecting section; a main base section which includes at least the liquid ejecting section and constitutes a base of the apparatus; and a sub base section which includes at least one of the liquid tank and the waste liquid containing chamber and is detachably attached to the main base section, and constitutes a base of the apparatus together with the main base section.

A printer includes a head including a plurality of ink ejecting units for ejecting different types of inks from nozzles, a waste liquid flow path that is a flow path of ink sucked from the nozzles, a suction unit that performs an ink suction operation of sucking the ink from the nozzles of the ink ejecting units via the waste liquid flow path, and a cleaning operation of sucking the cleaning liquid from nozzles via the waste liquid flow path, and a control unit that controls the suction unit so as to vary a suction amount of the cleaning liquid depending on the type of the ink sucked by the ink suction operation when the cleaning operation is performed.

According to an embodiment of the present invention, a printing apparatus that satisfactorily sucks and recovers a printhead is provided. A printing apparatus that includes a transfer member, and the first and second printheads has the following arrangement. The apparatus includes the first and second suction units which suck a plurality of nozzles of the first and second printheads, a common negative-pressure generation unit which generates a negative-pressure for suction by these suction units, and a moving unit which moves these suction units from one end to the other end of each printhead. Then, the moving unit moves the first and second suction units so as to pass through concave gaps with respect to ink discharge surfaces of the first and second printheads corresponding to the first and second suction units at different timings.

The inkjet printer includes a head, a circulation flow path, a cap, a first pump, and a control unit. The head has a nozzle surface having nozzles to eject ink. The circulation flow path circulates ink. The cap can contact the nozzle surface. The first pump is connected to an exhaust hole formed in the cap. In a soaking processing, the processor drives the first pump and causes the nozzle surface to be soaked in liquid, in a capping state in which the cap is in contact with the nozzle surface. In a circulation processing, the processor causes the ink to circulate in the circulation flow path in a state in which the nozzle surface is soaked in the liquid, after the soaking processing.

The coupling structure includes a container side joint and a main body side joint. The container side joint includes a container opening/closing valve, a container side communication passage, a backflow prevention valve and a protrusion. The container opening/closing valve is brought into contact with the protrusion by a pressure of the liquid filled in the container side communication passage. The main body side joint includes a main body opening/closing valve and a main body side communication passage. When the main body opening/closing valve pushes the container opening/closing valve at a coupling of the container side joint and the main body side joint, the container opening/closing valve is pushed in a coupling direction, is also tilted and is separated from the protrusion to communicate the container side communication passage with the main body side communication passage.

An inkjet recording apparatus includes a recording head, a conveyance belt, a control portion, an ink receiver, an ink discharging flow path, and a liquid supply mechanism. The recording head includes a plurality of nozzles for ejecting ink. The conveyance belt has a plurality of first openings and conveys a recording medium. The control portion executes flushing in which the ink is ejected through the nozzles of the recording head to pass through any of the plurality of first openings. The ink receiver is opposite disposed to be opposed to the recording head via the conveyance belt and receives the ink that has passed through the first openings during execution of the flushing. The ink discharging flow path is connected to the ink receiver. The liquid supply mechanism supplies a liquid capable of dissolving the ink into the ink receiver.

A printing apparatus includes a detection unit that is arranged to face an ejecting surface on which a plurality of nozzles of a printing head that ejects liquid droplets are arrayed, and detects an ejecting condition of the liquid droplets, a recovery unit that recovers an ejecting condition of nozzles of the printing head; and a control unit that determines whether to perform or skip inspection of the ejecting condition by the detection unit based on a state of each of the nozzles of the printing head, and controls a nozzle for which the inspection of the ejecting condition is determined to be skipped so as to perform the inspection of the ejecting condition by the detection unit after the recovery unit recovers the ejecting condition of the nozzle.

In an example, a printhead maintenance apparatus includes a pump, a current monitor and processing circuitry. The pump may be provided to increase a pressure in a printhead, and the current monitor may monitor a current consumption of the pump. The processing circuitry may determine a rate of change of current consumption of the pump, and compare the rate of change of current consumption to a predetermined threshold.