It is disclosed a printing fluid dispersing method for a printing system, the method comprising: transferring printing fluid from a supply to an element within the printing system by a pump wherein, between the supply and the element, a nozzle is provided comprising a plurality holes so that the transferring of printing fluid comprises forcing the printing fluid through the plurality of holes of the nozzle

A liquid ejecting apparatus includes: a liquid ejecting head configured to eject a liquid from a nozzle provided on a nozzle surface; a first storage portion that has an introduction portion into which the liquid accommodated in a liquid accommodating portion is introduced, the introduction portion being provided at an upper portion of the first storage portion; a second storage portion that communicates with the first storage portion via a communication passage and to which the liquid is supplied from the first storage portion due to a water head difference; a supply flow path for supplying the liquid from the second storage portion to the liquid ejecting head; a pressurizing portion that pressurizes an inside of the second storage portion; and a first valve configured to close the communication passage at the time of pressurization by the pressurizing portion.

The image formation device includes a tank, a hollow member, and a sensor. The tank is configured to store ink. The hollow member is disposed inside the tank, and extends in an up-down direction. The sensor is disposed outside the tank and above the hollow member, and is configured to detect a pressure inside the hollow member.

An inkjet recording apparatus includes a conveying belt, a recording head, and a flushing controller. The conveying belt includes the plurality of openings formed as a plurality of rows of openings, each row composed of openings arranged at predetermined intervals in a widthwise direction of the conveying belt. The openings of each of the plurality of rows of openings include overlapped portions at which the openings are over-lapped with the openings of any other of the plurality of rows of openings along a widthwise direction of the conveying belt. The flushing controller allows the recording head to do flushing by allowing each of all the nozzles inclusive of the nozzles facing the overlapped portions to eject ink a predetermined number of times.

An ink-jet recording apparatus includes a recording head including a plurality of pressurizing chambers for storing ink and a plurality of pressurizing elements for pressing ink in the pressurizing chambers to eject ink from nozzles; a head driver including a driving pulse generator that applies a drive voltage to the pressurizing element to generate a drive waveform for ejecting ink from the nozzles; a conveying belt having a plurality of openings which conveys a recording medium; and a control portion. The control portion controls the driving of the head driver and the conveying belt to perform flushing where ink droplets are ejected from the nozzles in the recording head to pass through one of the plurality of openings with a timing different from that for image recording, using a drive waveform with which the ink droplets ejected from the nozzle each become one droplet before passing through the openings.

A printing fluid delivery system comprising a fluid pump having an inlet and an outlet, a valve connected to the outlet of the fluid pump, and a controller to close the valve while the fluid pump is driven to increase the pressure at the outlet of the fluid pump based on a service condition and to open the valve based on a predefined relief condition to relieve the pressure at the outlet of the fluid pump.

A printing device and method is described comprising: selectively generating a negative fluid pressure between one of one or more printing fluid supplies and a first one of first and second ports of a printhead; selectively generating a positive fluid pressure between one of said printing fluid supplies and a second one of the first and second ports of the printhead; and providing a first pulsed signal to a first priming pump associated with a first one of the first and second ports, wherein the first one of said first and second ports of the printhead is opened under the control of said first priming pump, such that printing fluid within the printhead exits the printhead through the first one of the first and second ports.

An inkjet printing apparatus includes a surface acoustic wave module including an inner passage and a surface acoustic wave generator around the inner passage; and an outflow passage connected to the surface acoustic wave module to discharge ink, where the outflow passage includes a first outflow passage connected to the inner passage to discharge first ink particles and a second outflow passage connected to the inner passage to discharge second ink particles having an average diameter smaller than that of the first ink particles, and the surface acoustic wave generator is closer to the second outflow passage than the first outflow passage.

A continuous inkjet printer includes an ink circuit. A first part of the ink circuit includes hydraulic components for providing a print head of the CIJ printer with ink and solvent. A second part of the ink circuit includes a first single-block assembly including at least part of at least a first pump and a second single-block assembly including at least one filter. Each of the assemblies further includes: a housing having at least one fluid inlet and at least one fluid outlet; fluid connections to allow fluids to flow from the at least one fluid inlet, to the at least part of a first pump or said filter and then to the at least one fluid outlet; and a structure for mounting and disassembling the first single-block assembly and the second single-block assembly to and from the first part of the ink circuit, independently from each other.

A printing apparatus includes a suction unit configured to suction liquid from an ejection port; a valve provided at a first position in a supply passage and configured to be switchable between an open state in which the supply passage communicates and a closed state in which the supply passage is blocked; and a control unit configured to perform control of first suction in which the valve is set to the open state and the suction unit performs the suction such that the liquid reaches the first position or a second position downstream of the first position, after the first suction, perform control of second suction in which the valve is set to the closed state and the suction unit performs the suction, and after the second suction, perform control of setting the valve to the open state.