Abstract: A liquid container is enabled to contain a liquid therein. An outer wall of the liquid container has a first surface, a second and a third surfaces are adjacent to the first surface, and the second surface and the third surface face each other. The first surface has a space in which a storage element storing the information on the liquid container is contained. The first surface and the second surface have a first recessed portion that crosses a boundary between the first surface and the second surface, and the first surface and the third surface have a second recessed portion that crosses a boundary between the first surface and the third surface. The first recessed portion and the second recessed portion face each other across the space.

Abstract: A liquid container mounted on a recording apparatus and containing a liquid in a liquid containing portion, including a first surface which faces the recording apparatus when the liquid container is mounted on the recording apparatus, and a second surface opposite to the first surface, wherein the liquid containing portion has, on a bottom surface which is a lower surface in a gravity direction when the liquid container is mounted on the recording apparatus, a first inclined surface inclining downward in the gravity direction from the first surface side to the second surface side and a second inclined surface inclining upward in the gravity direction from the first surface side to the second surface side in this order from the first surface side.

Abstract: A liquid discharge head including a liquid storage chamber capable of holding a liquid, a liquid communication pipe communicating with the liquid storage chamber and being configured to supply the liquid from a liquid tank to the liquid storage chamber by installing the liquid tank to the pipe to communicate with the liquid tank, a discharge port communicating with the liquid storage chamber to discharge the liquid, an electrode pair each having an outside end portion located outside the liquid storage chamber and detecting a liquid level of the liquid storage chamber, and an electric contact portion connected to the outside end portion of each of the electrode pair. The electric contact portion is located above the liquid communication pipe with a discharge port surface on which the discharge port opens taking a position facing perpendicularly downward.

Abstract: A liquid discharge head includes a liquid storage chamber capable of holding a liquid, a liquid communication pipe communicating with the liquid storage chamber and being configured to supply the liquid from a liquid tank to the liquid storage chamber by installing the liquid tank to the pipe to communicate with the liquid tank, a discharge port communicating with the liquid storage chamber to discharge the liquid, an electrode pair each having an outside end portion located outside the liquid storage chamber and detecting a liquid level of the liquid storage chamber, and an electric contact portion connected to the outside end portion of each of the electrode pair. The electric contact portion is located above the liquid communication pipe with a discharge port surface on which the discharge port opens taking a position facing perpendicularly downward.

Abstract: A ink tank includes a casing having a partition wall configured to divide from each other an absorber storage chamber for storing an absorber capable of retaining ink and an ink storage chamber for storing ink to be supplied to the absorber storage chamber, and an ink supply port provided at the bottom surface of the absorber storage chamber and configured to supply the ink in the absorber storage chamber to an outside, wherein the sectional configuration when the absorber storage chamber is cut by a plane parallel to the partition wall and passing through the ink supply port is substantially T-shaped.

Abstract: A liquid discharge head including a liquid storage chamber capable of holding a liquid, a liquid communication pipe communicating with the liquid storage chamber and being configured to supply the liquid from a liquid tank to the liquid storage chamber by installing the liquid tank to the pipe to communicate with the liquid tank, an discharge port communicating with the liquid storage chamber to discharge the liquid, an electrode pair each having an outside end portion located outside the liquid storage chamber and detecting a liquid level of the liquid storage chamber, and an electric contact portion connected to the outside end portion of each of the electrode pair. The electric contact portion is located above the liquid communication pipe with an discharge port surface on which the discharge port opens taking a position facing perpendicularly downward.

Abstract: A liquid storage unit including a first liquid storage chamber having a constant volume and being capable of holding liquid supplied from a liquid tank; a second liquid storage chamber communicating with the first liquid storage chamber; a pressure control chamber configured to change a pressure of the pressure control chamber through actuation of a pressure control unit; and an elastic member being configured to tightly partition the second liquid storage chamber and the pressure control chamber from each other and being deformable so as to increase and decrease a volume of the second liquid storage chamber in accordance with the pressure of the pressure control chamber. The elastic member is capable of removing bubbles in the first liquid storage chamber by increasing and decreasing the volume of the second liquid storage chamber through the deformation.

Abstract: A rolled steel bar or wire rod having hot surface fatigue strength, wear resistance, and machinability even after hot forging has a composition containing C, Si, Mn, S, Cr, Mo (optional), Al, and N, with the balance being Fe and impurities. The chemical composition satisfies that fn1 defined by Formula (1) is 1.60 to 2.10. The structure of the rolled steel bar or wire rod for hot forging includes a ferrite-pearlite structure, a ferrite-pearlite-bainite structure, or a ferrite-bainite structure. A maximum value/a minimum value of average ferrite grain size, which is observed and measured randomly in 15 visual fields each having an area of 62500 ?m2 in a cross section, is not more than 2.0. fn1=Cr+2×Mo (1), and each symbol of elements in Formula (1) is substituted by a content (mass %) of a corresponding element.

Abstract: A rare earth metal extractant in the form of a dialkyl diglycol amic acid is synthesized by reacting diglycolic anhydride with a dialkylamine in an aprotic polar solvent, with a molar ratio of dialkylamine to diglycolic anhydride being at least 1.0, and removing the aprotic polar solvent.

Abstract: A ink tank includes a casing having a partition wall configured to divide from each other an absorber storage chamber for storing an absorber capable of retaining ink and an ink storage chamber for storing ink to be supplied to the absorber storage chamber, and an ink supply port provided at the bottom surface of the absorber storage chamber and configured to supply the ink in the absorber storage chamber to an outside, wherein the sectional configuration when the absorber storage chamber is cut by a plane parallel to the partition wall and passing through the ink supply port is substantially T-shaped.

Abstract: An ink tank includes a light-emitting portion and a light-guiding portion for guiding light emitted from the light-emitting portion, wherein the light-guiding portion includes an output portion configured to output the guided light to project individual information about the ink tank and a display portion formed on a side surface different from the output portion and configured to display information about a status of the ink tank by outputting the guided light.

Abstract: A liquid container includes an air-tight liquid-storage chamber or reservoir, a movable member for agitating liquid, and a protrusion portion for supporting the movable member. The movable member and the protrusion portion are disposed in the liquid-storage chamber. The movable member includes a first end that is linearly movable along the protrusion portion and a second end that is free.

Abstract: An ink container for retaining ink includes an ink containing body, an elastically displaceable supporting member, a light emitting portion, a light receiving portion for receiving light from the light emitting portion, a display portion for displaying the received light, and a light guide portion for optically connecting the light receiving portion and the display portion so as to guide the light received by the receiving portion to the display portion. The supporting member at least partly functions as the light guide portion. The light receiving portion is located, with a gap with respect to the light emitting portion, so as to cover the light emitting portion. The light receiving portion approaches the light emitting portion when the supporting member approaches the ink containing body by being subjected to urging toward the ink containing body.

Abstract: An ink jet printing apparatus is provided which can stir ink efficiently and reduce user stresses by specifying the time for stirring ink in an ink tank. A stir operation that reciprocally moves a carriage for stirring ink in the ink tank is executed in parallel with a suction-based operation of sucking out ink from a cap after a print operation.

Abstract: A rare earth metal extractant in the form of a dialkyl diglycol amic acid is synthesized by reacting diglycolic anhydride with a dialkylamine in a synthesis medium. A molar ratio (B/A) of dialkylamine (B) to diglycolic anhydride (A) is at least 1.0. A non-polar or low-polar solvent in which the dialkyl diglycol amic acid is dissolvable is used as the synthesis medium.

Abstract: An ink tank includes a stirrer supported in a freely moveable manner near an inner wall of an ink storage chamber. When the stirrer moves closest to the inner wall, a predetermined gap is formed between opposing surfaces of the inner wall and the stirrer.