Abstract: A liquid discharge apparatus includes a plurality of head units each of which includes a plurality of heads configured to discharge a liquid, and a plurality of temperature-controlled liquid supply manifolds each of which is configured to distribute the temperature-controlled liquid to the plurality of heads of one of the plurality of head units. The liquid discharge apparatus further includes a conveyor configured to convey a sheet onto which the liquid is applied by the plurality of head units, and the conveyor defines a sheet conveyance passage opposite the plurality of head units. At least one of the plurality of temperature-controlled liquid supply manifolds is disposed between two of the plurality of head units and in a vicinity of the sheet conveyance passage.

Abstract: A liquid discharge apparatus includes a head configured to discharge a liquid, a circulation passage through which a temperature-controlled liquid circulates, at least two heat generation portions different in heat generation amount from each other, and a cooler configured to cool the temperature-controlled liquid. The circulation passage is coupled to the head. The at least two heat generation portions are thermally coupled with the circulation passage in an ascending order of heat generation amount and downstream from the cooler in a direction of flow in the circulation passage.

Abstract: A liquid discharge apparatus includes a plurality of heads configured to discharge a liquid, a liquid supply manifold configured to distribute the liquid to the plurality of heads, and a temperature-controlled liquid supply manifold configured to supply a temperature-controlled liquid to the plurality of heads. The temperature-controlled liquid supply manifold is thermally coupled to the liquid supply manifold.

Abstract: A cooling device includes a metal member, a cooling member, and a sheet-shaped thermal conductive member. The metal member thermally couples with an element that generates heat. The cooling member includes a channel for refrigerant to flow. The thermal conductive member includes an adhesive surface adhered to the metal member and a non-adhesive surface pressed against and thermally coupled in contact with the cooling member. The thermal conductive member and the cooling member are separable.

Abstract: A liquid discharge apparatus includes a plurality of head units each of which includes a plurality of heads configured to discharge a liquid, and a plurality of temperature-controlled liquid supply manifolds each of which is configured to distribute the temperature-controlled liquid to the plurality of heads of one of the plurality of head units. The liquid discharge apparatus further includes a conveyor configured to convey a sheet onto which the liquid is applied by the plurality of head units, and the conveyor defines a sheet conveyance passage opposite the plurality of head units. At least one of the plurality of temperature-controlled liquid supply manifolds is disposed between two of the plurality of head units and in a vicinity of the sheet conveyance passage.

Abstract: A liquid discharge apparatus includes a plurality of heads configured to discharge a liquid, a liquid supply manifold configured to distribute the liquid to the plurality of heads, and a temperature-controlled liquid supply manifold configured to supply a temperature-controlled liquid to the plurality of heads. The temperature-controlled liquid supply manifold is thermally coupled to the liquid supply manifold.

Abstract: A liquid discharge apparatus includes a head configured to discharge a liquid, a circulation passage through which a temperature-controlled liquid circulates, at least two heat generation portions different in heat generation amount from each other, and a cooler configured to cool the temperature-controlled liquid. The circulation passage is coupled to the head. The at least two heat generation portions are thermally coupled with the circulation passage in an ascending order of heat generation amount and downstream from the cooler in a direction of flow in the circulation passage.

Abstract: A head device includes a liquid discharge head, a liquid supply channel, a second temperature-control-liquid channel, and a thermal connector. The liquid discharge head includes a heat generation member and a first temperature-control-liquid channel. The first temperature-control-liquid channel is disposed at a vicinity of the heat generation member. A temperature control liquid flows through the first temperature-control-liquid channel. The liquid supply channel supplies a liquid to the liquid discharge head. The temperature control liquid flows through the second temperature-control-liquid channel. The thermal connector thermally connects the liquid supply channel and the second temperature-control-liquid channel.

Abstract: An inkjet recording method of the present invention includes preparing an inkjet recording apparatus having an inkjet head that has N (N?4) nozzle arrays, so as to respectively discharge inks of at least four colors of cyan, magenta, yellow and black, having nozzles arranged in a first direction at a predetermined pitch P for discharging a curable ink which is cured by providing active energy, each of the nozzle arrays is arranged to be shifted in the first direction so as to have distances of more than 0 among each virtual line extending from each nozzle in a second direction perpendicular to the first direction, in which the viscosity of any of the respective inks at 25° C. is 10 to 30 mPa·s.

Abstract: A head device includes a liquid discharge head, a liquid supply channel, a second temperature-control-liquid channel, and a thermal connector. The liquid discharge head includes a heat generation member and a first temperature-control-liquid channel. The first temperature-control-liquid channel is disposed at a vicinity of the heat generation member. A temperature control liquid flows through the first temperature-control-liquid channel. The liquid supply channel supplies a liquid to the liquid discharge head. The temperature control liquid flows through the second temperature-control-liquid channel. The thermal connector thermally connects the liquid supply channel and the second temperature-control-liquid channel.

Abstract: An inkjet recording apparatus for forming an image by discharging an ink including an ink pigment and a polymerizable compound containing at least an N-vinyl lactam, in which the 90% diameter in cumulative volume distribution of the particle diameters of the ink pigment is equal to or less than 500 nm and the content of N-vinyl lactam is 3% to 24%, from nozzles of an inkjet head, which includes nozzle arrays having nozzles each of which discharges a curable ink cured by applied active energy and which are arranged in the first direction at a pitch P, the nozzle arrays being N (N?4) nozzle arrays of every color, which respectively discharge thick inks of at least four colors and which nozzle arrays are arranged to be shifted by P/N away from each other in the first direction.

Abstract: An inkjet recording apparatus for forming an image by discharging an ink including an ink pigment and a polymerizable compound containing at least an N-vinyl lactam, in which the 90% diameter in cumulative volume distribution of the particle diameters of the ink pigment is equal to or less than 500 nm and the content of N-vinyl lactam is 3% to 24%, from nozzles of an inkjet head, which includes nozzle arrays having nozzles each of which discharges a curable ink cured by applied active energy and which are arranged in the first direction at a pitch P, the nozzle arrays being N (N?4) nozzle arrays of every color, which respectively discharge thick inks of at least four colors and which nozzle arrays are arranged to be shifted by P/N away from each other in the first direction.

Abstract: An inkjet recording apparatus includes: an image forming device; a scanning device; a relative movement device which causes relative movement between the recording medium and the image forming device; a first active light beam irradiation device which radiates an active light beam onto the ink to provisionally cure the ink; a second active light beam irradiation device which radiates an active light beam having an irradiation light quantity for fully curing the ink; an ejection control device which controls ink ejection from the nozzle row, for each of a plurality of nozzle groups; and an irradiation control device which controls irradiation of the active light beam of the first active light beam irradiation device, with respect to each of a plurality of irradiation units, according to an irradiation light quantity of the active light beam of the first active light beam irradiation device.

Abstract: In an inkjet head which has nozzle rows having nozzles each of which ejects curable inks cured by imparted activation energy and which are arranged in a first direction at a pitch P, the nozzle rows being N (N?5) nozzle rows of every color which eject, respectively, thick inks of four colors including cyan, magenta, yellow and black, and at least one light ink among light inks similar in color tone to the thick inks, the nozzles in each of the nozzle rows are arranged so as to be shifted by P/N from each other in a first direction, a nozzle of an ink with lowest cure sensitivity is arranged on the most upstream side in a direction of relative movement of a recording medium in the first direction, and further the nozzle of light ink is arranged in between the nozzles of two different thick inks.

Abstract: An inkjet recording apparatus and an image forming method in which ink curing defects caused by differences in the activation energy absorption characteristics due to differences in the inks are avoided, and a desirable curing process can be achieved.

Abstract: An inkjet recording method of the present invention includes preparing an inkjet recording apparatus having an inkjet head that has N (N?4) nozzle arrays, so as to respectively discharge inks of at least four colors of cyan, magenta, yellow and black, having nozzles arranged in a first direction at a predetermined pitch P for discharging a curable ink which is cured by providing active energy, each of the nozzle arrays is arranged to be shifted in the first direction so as to have distances of more than 0 among each virtual line extending from each nozzle in a second direction perpendicular to the first direction, in which the viscosity of any of the respective inks at 25° C. is 10 to 30 mPa·s.

Abstract: In an inkjet head which has nozzle rows having nozzles each of which ejects curable inks cured by imparted activation energy and which are arranged in a first direction at a pitch P, the nozzle rows being N (N?5) nozzle rows of every color which eject, respectively, thick inks of four colors including cyan, magenta, yellow and black, and at least one light ink among light inks similar in color tone to the thick inks, the nozzles in each of the nozzle rows are arranged so as to be shifted by P/N from each other in a first direction, a nozzle of an ink with lowest cure sensitivity is arranged on the most upstream side in a direction of relative movement of a recording medium in the first direction, and further the nozzle of light ink is arranged in between the nozzles of two different thick inks.

Abstract: An image forming apparatus which includes a line head having a nozzle group in a two-dimensional matrix configuration, or a line head in which a plurality of head modules are joined together in a staggered matrix arrangement.

Abstract: The method forms an image using an inkjet recording apparatus, which includes: an image formation unit having a line head type inkjet head disposed opposite a circumferential surface of an image formation drum, the inkjet head depositing the aqueous ink onto the recording medium while the recording medium is held and conveyed in rotation on the circumferential surface of the image formation drum; and a drying unit arranged on a downstream side of the image formation unit, the drying unit having a drying device disposed opposite a circumferential surface of a drying drum, the drying device drying a solvent in the aqueous ink deposited on the recording medium, the drying unit drying the solvent by means of the drying device while the recording medium is held and conveyed in rotation on the circumferential surface of the drying drum; using, as the recording medium, a special paper which is a recording medium successively laminated from a base paper, a first layer containing a binder and a second layer containing

Abstract: An inkjet recording apparatus has: an inkjet head which ejects ink so as to record an image on a recording surface of a recording medium; a drum-shaped member which includes a drum, holds an edge of the recording medium, and conveys the recording medium in close contact with a circumferential surface of the drum; an intermediate conveyance body which holds an edge of the recording medium while moving the recording medium in rotation, and transfers the recording medium to the drum-shaped member; and a conveyance guide which guides a non-recording surface of the recording medium which is moved in rotation by the intermediate conveyance body, wherein the conveyance guide has a back tension application device which produces a force to act on the recording medium in an opposite direction to a direction of movement of the recording medium.