An object is to provide a liquid ejection apparatus and a method of controlling a liquid ejection apparatus capable of preventing bubbles generated by kogation removal from interfering with the kogation removal. To this end, in a long liquid ejection head with a liquid circulated therethough, a pressure chamber is pressurized and a voltage is applied to a heat applying portion and an electrode to perform kogation removing cleaning.

A wafer structure is disclosed and includes a chip substrate and a plurality of inkjet chips. The chip substrate is a silicon substrate which is fabricated by a semiconductor process on a wafer of at least 12 inches. The plurality of inkjet chips include at least one first inkjet chip and at least one second inkjet chip. The plurality of inkjet chips are directly formed on the chip substrate by the semiconductor process, respectively, and diced into the at least one first inkjet chip and the at least one second inkjet chip, to be implemented for inkjet printing. Each of the first inkjet chip and the second inkjet chip includes a plurality of ink-drop generators produced by the semiconductor process and formed on the chip substrate.

A filter is compressed between facing surfaces of a first configuration component and a second configuration component, and a molten resin is poured in such a compressed state. Injection molding of the first configuration component and the second configuration component, joining of the configuration components, and sealing of the circumference of the filter are performed by a pair of metal molds.

A fluid dispensing system with a fluid cartridge having a fluid reservoir and an ejection head. The ejection head has fluid ejectors that are in fluid flow communication with the fluid reservoir. A fluid detection circuit is electrically connected to at least one of the fluid ejectors. The fluid detection circuit is configured to detect and characterize a fluid in the fluid ejector, where the fluid detection circuit characterizes the resistivity of the fluid by adjusting an ejector voltage of the at least one of the fluid ejectors.

A method for manufacturing a printing bar unit for a printing system includes the steps of providing a support bar having a plurality of primary mounting positions, providing a plurality of exchangeable printheads having a plurality of inkjet nozzles, and releasably mounting the printheads to the support bar. Preceding the step of releasably mounting the printheads to the support bar, a plurality of reference organs are connected at the primary mounting positions to the support bar and undergo an alignment finishing process for forming a plurality of accurate secondary mounting positions, and then in a subsequent step the printheads are releasably mounted to the secondary mounting positions on the reference organs. A dimensional tolerance of the secondary mounting positions on the reference organs relative to each other is more accurate than a dimensional tolerance of the primary mounting positions on the support bar relative to each other.

In order that the interior of a cap member, in a case where the cap member abuts to a cover member, is allowed to have improved airtightness so that the cap member can sufficiently function, a sealing member is used to seal between the cover member and first and second flow path members for retaining the cover member.

A cover member includes two end regions located at two ends in a first direction, and two beam portions which extend in the first direction and connect the two end regions together and which, together with the two end regions, form a single opening that exposes a plurality of discharge ports. When a width of the opening is denoted as a [mm], a minimum length in the first direction of the end regions is denoted as c [mm], a modulus of longitudinal elasticity of the cover member is denoted as E [GPa], and a thickness of the cover member is denoted as t [mm], the following expression is established.

[00001]$c\ge \frac{10.Math.{\left(\frac{a}{25}\right)}^4}{{\left(\frac{t}{0.3}\right)}^3.Math.\left(\frac{E}{200}\right)}$

For appropriate execution of processing depending on a condition in an image printing apparatus, the image printing apparatus includes a mounting unit on which a tank is mountable, a print head, a sub tank which receives ink from the tank and supplies the ink to the print head, and a refilling unit which refills the sub tank with ink from the tank. In a case where a tank mounted on the mounting unit is noncompliant with a predetermined condition, the control unit prevents the refilling unit from refilling the sub tank with ink from the tank. In contrast, in a case where a tank mounted on the mounting unit is compliant with the predetermined condition, the control unit causes the refilling unit to refill the sub tank with ink from the tank.

An image recording apparatus includes a controller configured to make a transition of an operational mode of the controller between a first mode and a second mode. The first mode represents an operational state where a contract for a service using a first cartridge has been made. The second mode represents an operational state where the contract for the contract for the service has not been made. In the first mode, the controller stores a first tank liquid volume and a second tank liquid volume in a memory. The first tank liquid volume represents, when the first cartridge is attached to an attachment case, an amount of liquid supplied from the first cartridge and stored in a tank. The second tank liquid volume represents, when a second cartridge is attached to the attachment case, an amount of liquid supplied from the second cartridge and stored in the tank.

Printing apparatus and methods of producing such a device are disclosed. An example printhead die includes a first resistor (404) to cause fluid to be ejected out of a first nozzle (142; 205; 305) and a second resistor (405) to cause fluid to be ejected out of a second nozzle (142, 205, 305). The example printhead die also includes a first cavitation plate (408) to cover the first resistor (404) and a second cavitation plate (412) to cover the second resistor (405), the first cavitation plate (408) spaced from the second cavitation plate (412).