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.

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.

An inkjet printhead including a plurality of printhead dies, each printhead die including at least one crack sense resistor, at least one analog bus connected to each printhead die, and a controller separate from the plurality of printhead dies. The controller is configured to provide a known current to the at least one crack sense resistor of each printhead die in a selectable pattern via the at least one analog bus and to determine whether the printhead dies are cracked based on resulting voltages produced on the at least one analog bus.

A printing system facilitates the printing of articles of manufacture. The system includes an array of printheads, a support member positioned to be parallel to a plane formed by the array of printheads, a member movably mounted to the support member, an actuator operatively connected to the movably mounted member, an object holder configured to mount to the movably mounted member, and a controller operatively connected to the plurality of printheads and the actuator. The controller is configured to operate the actuator to move the object holder past the array of printheads and to operate the plurality of printheads to eject marking material onto objects held by the object holder as the object holder passes the array of printheads. The support member and printhead array are oriented vertically to enable the printing system to be installed in a vertical cabinet that provides a small footprint in a non-production environment.

A liquid ejecting apparatus includes an ejecting unit and a drive circuit that generates the drive signal in accordance with a first voltage and a second voltage. The drive circuit includes a first pair of transistors, a second pair of transistors, and an integrated circuit that includes a first terminal to which the first voltage is applied, a second terminal to which the second voltage is applied, a first output terminal group which outputs a first control signal group for controlling the first pair of transistors, and a second output terminal group which outputs a second control signal group for controlling the second pair of transistors. The first terminal, the second terminal, the first output terminal group, and the second output terminal group are arranged along one side of the integrated circuit. The second output terminal group is disposed between the first terminal and the second terminal.

A tank unit is configured to introduce liquid supplied from a container and to lead out liquid toward a head configured to eject the liquid. The tank unit includes a storage section that stores the liquid supplied from the container, an introduction section that introduces the liquid supplied from the container into the storage section, an atmosphere opening section configured to open inside of the storage section to atmosphere, and an outlet section that leads out the liquid stored in the storage section. The introduction section is connected to the storage section, extends in a vertical direction in the storage section, and has an open end located within the storage section. The storage section includes a blocking section including a first protruding section located at a position in the vertical direction facing the open end and a second protruding section extending upward from the first protruding section.

A determination is made on whether or not a recording medium is held in a state where calibration is executable, and the execution is pending in a case where the recording medium is not held. When the execution is pending, the determination is made again after a predetermined period elapses, and the calibration is executed in a case where the recording medium is held.

An inkjet printing apparatus comprises an inkjet head disposed above a stage and including nozzles through which ink including bipolar elements is discharged, the bipolar elements each having regions partially doped with different polarities. At least part of the nozzles is deflected from a direction in case that the nozzles are in a deflected state.

A liquid ejection device includes: a liquid ejection unit with an ejection port surface provided with an ejection port from which liquid is ejected and configured to eject the liquid onto a substrate at an ejection position; an image capturing mechanism configured to face the ejection port surface of the liquid ejection unit and to capture an image of the ejection port surface at a maintenance position different from the ejection position; and a lighting unit configured to irradiate the ejection port surface at multiple incidence angles with respect to the ejection port surface in an operation of capturing an image of the ejection port surface by the image capturing mechanism.

A control board connectable to a liquid ejection head includes a power supply circuit outputting a first voltage, a connector connectable to a cable through which the first voltage is input and a second voltage is output, and a processor detecting a connection error of the cable using a difference between the first and second voltages, and control the circuit to turn off upon detection of the error. The connector includes first, second, and third terminals adjacent to each other and arranged along a direction in this order and fourth, fifth, and sixth terminals adjacent to each other and arranged along the first direction in this order. The first voltage is input to the second terminal, the second voltage is output from the fifth terminal, and the first, third, fourth, and sixth terminals are ground terminals. The second and fifth terminals are short-circuited in the liquid ejection head.