A liquid cartridge includes: a housing including first and second protrusions; and a circuit board including an electrode. The first protrusion is positioned rearward but the second protrusion is positioned forward relative to the circuit board. When viewed in a width direction crossing a gravitational direction, an outline of the liquid cartridge between a first point and a second point is lower than an imaginary line. The imaginary line passes through the first point on the first protrusion and the second point on the second protrusion. A distance between a front edge of the electrode and the first point is smaller than a distance between the front edge and the second point. A dimension between a front end and a rear end of the second protrusion is greater than a distance between a frontmost end of the housing and the front end of the second protrusion.

A sonic speed measurement device includes a reception array in which a plurality of reception elements which output reception signals in response to reception of an ultrasonic wave are disposed in one direction, a phase difference detection portion that detects a phase difference between the reception signals output from the reception elements adjacent to each other in a case where the plurality of reception elements receive the ultrasonic wave which propagates in a spherical wave shape from a target point, and a sonic speed calculation portion that calculates a sonic speed of the ultrasonic wave on the basis of the phase difference.

An ink cartridge adapter or ink cartridge includes a casing; and a plurality of pad electrodes mounted on the casing so as to be movable in a direction outwardly away from a side surface of the casing.

A packaging assembly includes an outer packaging unit, at least one to-be-packaged unit, and a loading unit configured to accommodate the at least one to-be-packaged unit to limit movement of the at least one to-be-packaged unit with respect to the loading unit. The outer packaging unit includes a receiving unit capable of receiving at least a part of the loading unit and the at least one to-be-packaged unit which are fit to each other.

A liquid container refillable with liquid to be supplied to a printer includes a bag; a liquid supplying port member having a liquid supplying port; a liquid supply flow passage provided inside the liquid supplying port member; a liquid filling flow passage branching off from the liquid supply flow passage; and a communication port provided inside the liquid supplying port member and being in communication with the liquid filling flow passage and facing an internal surface of the bag. The bag is fixed to the liquid supplying port member such that a gap is formed between the bag and the peripheral portion of the communication port due to a flow of the liquid from the liquid supply flow passage to the liquid filling flow passage, the gap being in communication with the liquid containing portion through the communication port.

An image-recording apparatus includes: a first tank defining a first storage chamber; a second tank defining a second storage chamber; a conveying mechanism for conveying sheets along a conveying path extending in a depthwise direction and a widthwise direction perpendicular to a vertical direction and the depthwise direction; and a recording head including a nozzle. Liquid in the first storage chamber is supplied through a communication port to the second storage chamber and then to the recording head through a liquid outlet port. The second storage chamber is positioned further in a first depthwise direction relative to the nozzle and further in a first widthwise direction relative to the conveying path. A volume of a prescribed space above a liquid level equal to a height of the communication port in the second storage chamber is greater than that of a liquid channel between the liquid outlet port and the nozzle.

An ink refill container configured to refill an ink tank with ink and an ink refill system. An ink refill container includes a container main body having an ink chamber; an ink outlet forming portion provided at an edge of the container main body including an ink outlet configured to allow ink to flow out from the ink chamber; a valve provided in ink outlet forming portion and configured to seal the ink outlet in an openable and closable manner; and a positioning structure configured to abut on part of the ink tank and position the valve relative to ink tank when valve is opened. The positioning structure has a positioning surface located on an opposite side to a container main body side where the container main body is located, across the valve and extends in a direction intersecting with a center axis of the ink outlet.

Provided is an aqueous ink that excels in a hue as a yellow ink, and capable of recording an image that excels both in color developability and light fastness. The aqueous ink is an ink for inkjet, containing a first coloring material and a second coloring material. The first coloring material is a compound represented by general formula (1), and the second coloring material is a compound represented by general formula (2). ##STR00001##

A method of printing a stealth white image includes applying a stealth ink containing a red coloring material that emits visible light at exposure to ultraviolet radiation and a green coloring material that emits visible light at exposure to ultraviolet radiation to a substrate which contains a fluorescent brightener to form the stealth white image thereon, wherein the stealth white image demonstrates an a* value of from −2.0 to 2.0 and a b* value of from −10.0 to 0 at exposure to ultraviolet radiation having a wavelength of 370 nm according to CIE 1976 L*a*b* colorimetric system.

Provided is a liquid container configured to be detachably attached to a printer body. The liquid container includes a liquid containing portion, a supplying passage member, and an adapter. The liquid containing portion is a portion for containing liquid. The supplying passage member has a supplying passage in liquid communication with the liquid containing portion, the liquid contained in the liquid containing portion being supplied toward the printer body through the supplying passage. The adapter is mounted on the supplying passage member and configured to couple the supplying passage to the printer body. The adapter and the supplying passage member are joined by snap fitting.