Abstract: There is provided a flow path structure including: a storage chamber that stores a liquid; a pressure receiver that receives a first pressure inside the storage chamber and a second pressure outside the storage chamber; a valve that changes the first pressure according to the movement of the pressure receiver; and a pressing portion that presses the pressure receiver according to the supply pressure of the fluid from a fluid supply source, in which an area of the front end of the pressing portion that presses the pressure receiver is smaller than an area of a rear end that receives the supply pressure.

Abstract: Disclosed is an ink composition for ink jet recording that can realize excellent printing quality on various recording media, has a high level of color developing properties particularly on plain paper, and can realize excellent gloss for glossy paper and, at the same time, is excellent in ink reliability such as ejection stability, storage stability, and recovery from clogging. The ink composition includes at least a magenta solid solution pigment, a polymer, which can render the pigment dispersible in the ink composition, and water. The polymer is produced by copolymerizing a monomer composition including at least a styrene macromer (A) and a salt forming group-containing monomer (B).

Abstract: An aqueous ink ensuring less blurring and high color formation on plain paper, satisfactory color formation and fixing property on special paper and excellent ejection stability is realized by using a microcapsule of a colorant encapsulated with a polymer and rendered dispersible in water and specifying the amount of the aromatic ring in the polymer to be from 20 to 70 wt % of the polymer.

Abstract: A maintenance device includes a liquid absorption body which absorbs a liquid which is attached to a nozzle forming surface by abutting the nozzle forming surface of a liquid ejecting head in which a plurality of nozzle rows configured of a plurality of nozzles ejecting the liquid are provided in parallel, wherein the liquid absorption body has a penetration suppressing section which suppresses the spread of the liquid due to penetration of the liquid absorbed from the nozzle forming surface of the liquid ejecting head, and wherein the penetration suppressing section is disposed between the nozzle rows ejecting the liquids of different colors from each other in a direction intersecting the nozzle row direction, in a case where the liquid absorption body abuts the nozzle forming surface of the liquid ejecting head.

Abstract: A printing apparatus includes a head having a nozzle through which ink that contains thermoplastic resin particles and whose viscosity at 50° C. is equal to or greater than 2.1 mPa·s is discharged, a pressure chamber, and a driving element; an ink non-absorptive medium; a heating unit; and a control unit that applies driving signals to the driving element. In the printing apparatus, a discharge waveform generated by the driving signal includes a first expansion-element that expands the pressure chamber, a contraction-element that contracts the pressure chamber having been expanded by the first expansion-element, a second expansion-element that expands the pressure chamber having been contracted by the contraction-element, a third expansion-element that further expands the pressure chamber having been expanded by the second-expansion element, and a connection-element that connects an end terminal of the second expansion-element with a start terminal of the third expansion-element at the same potential.

Abstract: An aqueous ink ensuring less blurring and high color formation on plain paper, satisfactory color formation and fixing property on special paper and excellent ejection stability is realized by using a microcapsule of a colorant encapsulated with a polymer and rendered dispersible in water and specifying the amount of the aromatic ring in the polymer to be from 20 to 70 wt % of the polymer.

Abstract: A printing apparatus, has a head having a plurality of nozzles for discharging an ink containing thermoplastic resin particles and having a viscosity at 50° C. of 2.1 mPa·s or more to a non-ink-absorbing medium and a drive element provided in each of the nozzles, a heating portion which heats the medium, and a control portion which drives the drive elements by applying a drive waveform to discharge ink droplets from the nozzles corresponding to the drive elements, in which a first ink droplet is discharged from the nozzle by the application of the drive waveform to the drive element, and the discharge speed of an ink droplet whose discharge speed is lower of a second ink droplet and a third ink droplet discharged accompanying the first ink droplet is 4.0 m/s or more.

Abstract: There is provided an ink jet recording apparatus including: first cleaning which performs non-recording ejection of ink for ink jet recording to an ink receiving medium and cleans a nozzle and a nozzle surface of a print head; second cleaning which moves the print head to the ink receiving medium, performs non-recording ejection of the ink for ink jet recording from the print head to the ink receiving medium under a condition that the amount of the ink for ink jet recording is smaller than an amount of the ink ejected in the non-recording ejection by the first cleaning and an execution frequency is higher than that in the first cleaning, and cleans the nozzle of the print head; and a wiping mechanism which wipes the nozzle surface by using a wiping member.

Abstract: A printing apparatus includes a head having a nozzle through which ink that contains thermoplastic resin particles and whose viscosity at 50° C. is equal to or greater than 2.1 mPa·s is discharged, a pressure chamber, and a driving element; an ink non-absorptive medium; a heating unit; and a control unit that applies driving signals to the driving element. In the printing apparatus, a discharge waveform generated by the driving signal includes a first expansion-element that expands the pressure chamber, a contraction-element that contracts the pressure chamber having been expanded by the first expansion-element, a second expansion-element that expands the pressure chamber having been contracted by the contraction-element, a third expansion-element that further expands the pressure chamber having been expanded by the second-expansion element, and a connection-element that connects an end terminal of the second expansion-element with a start terminal of the third expansion-element at the same potential.

Abstract: Disclosed is an ink composition for ink jet recording that can realize excellent printing quality on various recording media, has a high level of color developing properties particularly on plain papers, and can realize excellent gloss for glossy paper and, at the same time, is excellent in ink reliability such as ejection stability, storage stability, and recovery from clogging. The ink composition is characterized by comprising at least a magenta solid solution pigment, a polymer, which can render the pigment dispersible in the ink composition, and water, the polymer having been produced by copolymerizing a monomer composition comprising at least a styrene macromer (A) and a salt forming group-containing monomer (B).

Abstract: A printing apparatus includes a head having a nozzle ejecting an ink having thermoplastic resin particles and a viscosity of 2.1 mPa·s or more at 50° C., a pressure chamber, and a drive element; a medium having ink-unabsorbable characteristics and a length of 64 inches or less in a predetermined direction; a movement mechanism which moves the head in the predetermined direction; a heating unit which heats the medium; and a control unit which causes the movement mechanism to move the head in the predetermined direction and applies a drive waveform generating a pressure change in the ink inside the pressure chamber, to the drive element. The control unit applies a micro-vibration waveform having a size which does not allow the ink to be ejected from the nozzle onto the drive element corresponding to the nozzle if the nozzle does not eject the ink.

Abstract: A maintenance device includes a liquid absorption body which absorbs a liquid which is attached to a nozzle forming surface by abutting the nozzle forming surface of a liquid ejecting head in which a plurality of nozzle rows configured of a plurality of nozzles ejecting the liquid are provided in parallel, wherein the liquid absorption body has a penetration suppressing section which suppresses the spread of the liquid due to penetration of the liquid absorbed from the nozzle forming surface of the liquid ejecting head, and wherein the penetration suppressing section is disposed between the nozzle rows ejecting the liquids of different colors from each other in a direction intersecting the nozzle row direction, in a case where the liquid absorption body abuts the nozzle forming surface of the liquid ejecting head.

Abstract: A liquid ejection apparatus includes a liquid storing unit that stores a liquid, a liquid ejection head that ejects the liquid, a supply tube having one end connected to the liquid storing unit and the other end connected to the liquid ejection head so that the liquid is supplied from the liquid storing unit to the liquid ejection head, a heating unit that heats a fluid, and a circulation tube in which the fluid that has been heated in the heating unit circulate therethrough, wherein the circulation tube is wound on the supply tube at least on the side of the liquid ejection head.

Abstract: Disclosed is an ink composition for ink jet recording that can realize excellent printing quality on various recording media, has a high level of color developing properties particularly on plain papers, and can realize excellent gloss for glossy paper and, at the same time, is excellent in ink reliability such as ejection stability, storage stability, and recovery from clogging. The ink composition is characterized by comprising at least a magenta solid solution pigment, a polymer, which can render the pigment dispersible in the ink composition, and water, the polymer having been produced by copolymerizing a monomer composition comprising at least a styrene macromer (A) and a salt forming group-containing monomer (B).

Abstract: A liquid ejecting apparatus includes: a plurality of nozzle openings that eject liquid; pressure generating chambers in communication with the respective nozzle openings; a liquid ejecting head including a pressure generating unit that causes the pressure generating chambers to generate a pressure change; a sucking unit that covers the nozzle openings and sucks the liquid from the nozzle openings; a suction control unit that causes the sucking unit to suck the liquid from the nozzle openings; and a liquid flow control unit that brings the pressure generating units into vibrations selectively corresponding to the pressure generating chambers to vibrate when sucking the liquid by the sucking unit and controls a flow of fluid in the pressure generating chambers by not driving the pressure generating units corresponding to the non-selected pressure generating chambers.

Abstract: An ink composition at least including: a pigment; a water-soluble organic solvent; a surfactant; and 60 to 10% by weight of water.

Abstract: An aqueous ink composition having high storage stability is provided. The aqueous ink composition of the invention contains a coloring agent, a “dispersing resin containing a repeating unit structure (I) having an unneutralized group and a repeating unit structure (II) having a neutralized group and capable of being hydrated and/or dissolved in water”, a water-soluble organic solvent capable of swelling and/or dissolving the foregoing repeating unit structure (I), and water.

Abstract: An aqueous ink ensuring less blurring and high color formation on plain paper, satisfactory color formation and fixing property on special paper and excellent ejection stability is realized by using a microcapsule of a colorant encapsulated with a polymer and rendered dispersible in water and specifying the amount of the aromatic ring in the polymer to be from 20 to 70 wt % of the polymer.