A liquid discharge apparatus includes a plurality of heads configured to discharge a liquid, a supply channel connected to the plurality of heads, the supply channel configured to supply the liquid to the plurality of heads, a collection channel connected to the plurality of heads, the collection channel configured to collect the liquid from the plurality of heads, a supply damper configured to define a deformable wall of the supply channel, a collection damper configured to define a deformable wall of the collection channel, a supply damper chamber facing the supply damper, a collection damper chamber facing the collection damper, a pressure pump configured to apply a pressure to the supply damper chamber, and a depressurize pump configured to apply a negative pressure to the collection damper chamber.

A supporting section is disposed to confront an ejection surface and supports a recording medium. A first tank is mounted on a first-tank mount section. A liquid conveying section conveys liquid to a liquid ejecting head. A receiving section receives liquid ejected from the liquid ejecting head. A waste-liquid conveying section conveys liquid to the waste-liquid tank. A first casing holds the liquid ejecting head, the first-tank mount section, and the liquid conveying section. A second casing holds the supporting section, the receiving section, the waste-liquid tank, and the waste-liquid conveying section. The first casing is connected with the second casing such that the first casing is movable relative to the second casing. The first casing takes a first position at which the ejection surface confronts the supporting section and a second position at which the ejection surface is farther away from the supporting section than at the first position.

A supporting section is disposed to confront an ejection surface and supports a recording medium. A first tank is mounted on a first-tank mount section. A liquid conveying section conveys liquid to a liquid ejecting head. A receiving section receives liquid ejected from the liquid ejecting head. A waste-liquid conveying section conveys liquid to the waste-liquid tank. A first casing holds the liquid ejecting head, the first-tank mount section, and the liquid conveying section. A second casing holds the supporting section, the receiving section, the waste-liquid tank, and the waste-liquid conveying section. The first casing is connected with the second casing such that the first casing is movable relative to the second casing. The first casing takes a first position at which the ejection surface confronts the supporting section and a second position at which the ejection surface is farther away from the supporting section than at the first position.

Described herein are bioprinters comprising: one or more printer heads, wherein a printer head comprises a means for receiving and holding at least one cartridge, and wherein said cartridge comprises contents selected from one or more of: bio-ink and support material; a means for calibrating the position of at least one cartridge; and a means for dispensing the contents of at least one cartridge. Further described herein are methods for fabricating a tissue construct, comprising: a computer module receiving input of a visual representation of a desired tissue construct; a computer module generating a series of commands, wherein the commands are based on the visual representation and are readable by a bioprinter; a computer module providing the series of commands to a bioprinter; and the bioprinter depositing bio-ink and support material according to the commands to form a construct with a defined geometry.

A liquid discharge device includes a first liquid container, a liquid discharger, a second liquid container, a first liquid flow passage, and a second liquid flow passage. The first liquid container is configured to contain liquid. The liquid discharger is configured to discharge the liquid supplied from the first liquid container in a liquid supply direction. The second liquid container is configured to contain the liquid supplied from the first liquid container. The first liquid flow passage is a passage through which the liquid is supplied from the first liquid container to the liquid discharger via the second liquid container. The second liquid flow passage is a passage through which the liquid is supplied from the first liquid container to the liquid discharger without passing through the second liquid container.

A liquid discharge device includes a first liquid container, a liquid discharger, a second liquid container, a first liquid flow passage, and a second liquid flow passage. The first liquid container is configured to contain liquid. The liquid discharger is configured to discharge the liquid supplied from the first liquid container in a liquid supply direction. The second liquid container is configured to contain the liquid supplied from the first liquid container. The first liquid flow passage is a passage through which the liquid is supplied from the first liquid container to the liquid discharger via the second liquid container. The second liquid flow passage is a passage through which the liquid is supplied from the first liquid container to the liquid discharger without passing through the second liquid container.

A liquid supplying device includes a tank a tank and a cartridge. The cartridge includes a first storage chamber. The cartridge is formed with a communicating opening in communication with the first storage chamber. The tank has a second storage chamber and a joint having a hollow cylindrical shape. In an attachment state where the communicating opening of the cartridge is connected to the joint, the first storage chamber has a portion positioned above the joint and the second storage chamber is positioned below the joint. At least in the first end portion, the liquid passage has a rectangular shape in a cross section taken along a plane perpendicular to an extending direction of the liquid passage.

Disclosed are an apparatus and a method for quickly and accurately inspecting a droplet on a substrate. An apparatus for inspecting a droplet on a substrate according to an exemplary embodiment of the present disclosure includes: an ultrasonic sensor configured to apply an ultrasonic wave to a droplet on the substrate and detect an ultrasonic wave reflected from the substrate; and a processor configured to acquire a height of the droplet at each position on the substrate on the basis of a signal of the ultrasonic wave reflected from the droplet on the substrate, calculate a volume of the droplet on the basis of the heights of the droplet at the positions, and store or output data in relation to the volume of the droplet. The embodiment of the present disclosure may calculate the volume of the droplet using the ultrasonic wave, thereby quickly and accurately inspecting the droplet on the substrate.

An inkjet recording device including: inkjet head having a pressure chamber; a first pressure source to adjust ink energy per unit volume to generate “energy per unit volume” P1(Pa) relative to static ink at an atmospheric pressure at a nozzle opening height; a second pressure source to adjust ink energy per unit volume to generate “energy per unit volume” P2(Pa) relative to static ink; and a hardware processor. The first pressure source, pressure chamber, and second pressure source are connected in this order by a flow path. Assuming that a pressure loss occurring from the first pressure source to the nozzle due to circulation flow rate is ΔPa, a proportionality constant of a differential pressure (P1−P2) and ΔPa is “a”, and an appropriate pressure in vicinity of the nozzle opening is Pn, the hardware processor controls pressure to establish P2={Pn−(1−a)P1}/a.

A liquid cartridge includes a case, a liquid supply portion, a circuit board, a residual-amount detecting portion, a base surface, and a plate member. The residual-amount detecting portion includes an optical access portion accessible by light traveling in a left-right direction. The optical access portion has a portion positioned above and away from electrodes of the circuit board by a first distance in an attached posture. The plate member extends frontward from the base surface, and provides a light-shielding region and a light-transmissive region. The light-shielding region is positioned rearward of the electrodes and frontward of the residual-amount detecting portion. The light-transmissive region is positioned rearward of the light-shielding region and frontward of the residual-amount detecting portion. Each of the light-transmissive region and the light-transmissive region has a portion positioned above and away from the electrodes by the first distance in the attached posture.