Abstract: To provide a head device, a liquid jetting apparatus, and a head maintenance method with which it is possible to suppress a decrease in performance of a liquid-repellent film on a nozzle surface that is caused by a wiping process with respect to the nozzle surface. Provided is a head device including an ink jet head (10) in which a liquid-repellent film (10B) is formed on a nozzle surface (10A) and a head control unit. The head control unit applies a negative pressure to liquid in a nozzle, performs a non-jetting driving operation of causing the liquid in the nozzle to vibrate without being jetted, and stops the non-jetting driving operation for a wiping target nozzle (12A) with which a wiping member (22) to be used in a wiping process comes into contact in a case where the wiping process with respect to the nozzle surface is to be performed.

Abstract: Provided are an image forming device that always forms an image with an optimum treatment quality, and a manufacturing method of a printed material. An image forming device includes a transport unit that transports a recording medium in a transport direction, a printing unit that applies an ink to a printing surface of the transported recording medium to perform printing, a treatment unit that performs treatment on the transported recording medium, and a movement unit that changes a distance between the printing unit and the treatment unit in the transport direction, in which the distance is controlled based on at least one information of information on a transportation speed of the recording medium in the transport unit, information on an applied amount of the ink in the printing unit, or information on a surface state of the printing surface of the recording medium.

Abstract: Provided is a printer capable of efficiently printing an image on a cylindrical recording medium with simple control. A plurality of printing start positions are set on an outer circumferential surface of a recording medium. A processor performs transport control of the recording medium for a transport unit and printing control of the recording medium for a printing unit provided in each station. In the transport control, control for the transport unit is performed such that the recording medium is rotated at a constant speed, movement of the recording medium is stopped each time the recording medium arrives at the station, and the movement of the recording medium is restarted after printing at the station is completed. In the printing control, control for the printing unit of each station is performed such that image printing is started from the printing start position that first reaches the printing position.

Abstract: Provided are an inkjet printing device and a printing method capable of grasping a position of a non-product image, such as a jetting state monitoring pattern, on a continuous medium. An inkjet printing device includes a medium transport mechanism that transports a continuous medium (12) in a medium transport direction, an inkjet head that prints a user image on the continuous medium, one or more processors, and one or more memories that are connected to the processors and store commands which are able to be executed by using the processors, in which the processor reads out the command from the memory and prints non-product image position information (304) including information on a position of a non-product image (302) printed on the continuous medium in the continuous medium at a position (12A) on a downstream side of a region in which the non-product image is printed in the medium transport direction.

Abstract: Provided are an image forming device that always forms an image with an optimum treatment quality, and a manufacturing method of a printed material. An image forming device includes a transport unit that transports a recording medium in a transport direction, a printing unit that applies an ink to a printing surface of the transported recording medium to perform printing, a treatment unit that performs treatment on the transported recording medium, and a movement unit that changes a distance between the printing unit and the treatment unit in the transport direction, in which the distance is controlled based on at least one information of information on a transportation speed of the recording medium in the transport unit, information on an applied amount of the ink in the printing unit, or information on a surface state of the printing surface of the recording medium.

Abstract: To provide a head device, a liquid jetting apparatus, and a head maintenance method with which it is possible to suppress a decrease in performance of a liquid-repellent film on a nozzle surface that is caused by a wiping process with respect to the nozzle surface. Provided is a head device including an ink jet head (10) in which a liquid-repellent film (10B) is formed on a nozzle surface (10A) and a head control unit. The head control unit applies a negative pressure to liquid in a nozzle, performs a non-jetting driving operation of causing the liquid in the nozzle to vibrate without being jetted, and stops the non-jetting driving operation for a wiping target nozzle (12A) with which a wiping member (22) to be used in a wiping process comes into contact in a case where the wiping process with respect to the nozzle surface is to be performed.

Abstract: Provided are a medium conveying device and an inkjet printer that can convey a medium stably. In a case where a paper P is conveyed along a plane in a conveying unit 40, a posture of the paper P is corrected by a posture correction unit 20, and then the paper P is delivered to the conveying unit 40 by a delivery unit 30. The delivery unit 30 holds a leading end portion of the paper P of which the posture is corrected by the posture correction unit 2 with a paper holding bar 31, and delivers the paper P to the conveying unit 40 by moving the paper holding bar 31 linearly along a conveying direction of the paper P by the conveying unit 40.

Abstract: A printed product is produced by applying at least one colored and water-containing ink to image regions on a printing material in a drop-on-demand process, applying a substantially colorless and water-containing liquid a) to non-image regions and/or b) to image regions that have little ink in a drop-on-demand process and drying the printing material. In this case, the printing material has a coating with at least one acid. After applying ink and applying the liquid, a water-containing further liquid is applied both to image regions and to non-image regions of the printing material. The first-mentioned liquid and/or the further liquid contains at least one substance for at least partly neutralizing the acid. The undesired formation of crease waves or curls and glossiness fluctuations between varnished image areas and varnished non-image areas is thus advantageously avoided.

Abstract: There are provided an ink jet printing apparatus and a color conversion processing device that can prevent the generation of offset and blocking and can stably jet ink. A first LUT in which a total amount of ink after conversion is large overall and a second LUT in which a total amount of ink after conversion is small overall are prepared as a look-up table (LUT) that is used in color conversion processing. A LUT to be used is selected according to the number of printed mediums. The first LUT is selected in a case in which the number of printed mediums is smaller than a threshold value, and the second LUT is selected in a case in which the number of printed mediums is equal to or larger than a threshold value.

Abstract: Test patterns are printed by ink jet means for jetting ink containing a color material and transparent liquid jet means for jetting transparent liquid. In the test patterns, ink and transparent liquid are applied to different regions on the same medium and ink application regions and transparent liquid application regions are arranged adjacent to each other. A device for determining the amount of transparent liquid to be jetted includes information acquisition means for acquiring information representing the amount of medium deformation of a medium on which the test patterns are printed, and information processing means for determining the amount of transparent liquid to be jetted by the transparent liquid jet means for jetting the transparent liquid, from the information representing the amount of medium deformation acquired by the information acquisition means.

Abstract: Provided are an image recording apparatus that efficiently detects defective recording elements causing image defects in a plurality of recording heads and a method of detecting the defective recording elements. An image recording apparatus including: a plurality of recording heads; an indicator acquisition unit for acquiring an indicator which relatively indicates how easily image defects are visually perceived for each color, an appearance ratio setting unit for setting an appearance ratio of a test pattern as a higher value as the indicator of each color becomes higher; a recording unit for recording the test pattern of each color on a recording medium at the appearance ratio; an imaging unit for capturing an image of the test pattern which is recorded on the recording medium; and an analysis unit for analyzing the captured test pattern and detecting a defect of a recording element in the recording head.

Abstract: There are provided an ink jet printing apparatus and a color conversion processing device that can prevent the generation of offset and blocking and can stably jet ink. A first LUT in which a total amount of ink after conversion is large overall and a second LUT in which a total amount of ink after conversion is small overall are prepared as a look-up table (LUT) that is used in color conversion processing. A LUT to be used is selected according to the number of printed mediums. The first LUT is selected in a case in which the number of printed mediums is smaller than a threshold value, and the second LUT is selected in a case in which the number of printed mediums is equal to or larger than a threshold value.

Abstract: Provided are a nozzle wiping sheet, a nozzle wiping unit, and an image forming apparatus capable of preventing occurrence of streaks during printing immediately after maintenance. A wiping member (120) wipes a nozzle surface (57K) of a jetting head (56K) provided with a nozzle through which liquid droplets are jetted, in which a shape of the liquid droplet added dropwise to the wiping member (120) after a cleaning liquid (108) is added to the wiping member (120) satisfies the following condition when an aspect ratio of the liquid droplet after 40 seconds after the addition of the cleaning liquid (108) is assumed to be R, and the R is 1.3 or more.

Abstract: In an ink jet recording device in which a paper supporting part is constituted by a first support and a second support having a comb teeth structure, a region where paper is supported by only the first support is defined as a first region, a region where the paper is supported by only the second support is defined as a second region, and a region where the paper is supported by the first support and the second support is defined as a third region. Charts including a plurality of grayscales for the respective regions are drawn. The respective drawn charts are read by an image reader. Correction values of density unevenness are obtained for the respective regions on the basis of the reading results. Density data of an image are corrected for the respective regions on the basis of the correction values of the density unevenness for the respective regions.

Abstract: When a liquid ejection head and a first wiping unit are moved relatively to clean a surface, the first wiping unit making a first wiping member travel in a first direction, a direction opposite to the first direction is used as a moving direction of the head with reference to the first wiping member in relative moving therebetween. When the head and a second wiping unit are moved relatively to each other to clean the surface, the second wiping unit making a second wiping member travel in a second direction having a component of a direction opposite to the first direction, a direction opposite to the second direction is used as a moving direction of the head with reference to the second wiping member in relative moving therebetween to move the second wiping unit and the head relatively to clean the same area on the surface.

Abstract: Test patterns are printed by ink jet means for jetting ink containing a color material and transparent liquid jet means for jetting transparent liquid. In the test patterns, ink and transparent liquid are applied to different regions on the same medium and ink application regions and transparent liquid application regions are arranged adjacent to each other. A device for determining the amount of transparent liquid to be jetted includes information acquisition means for acquiring information representing the amount of medium deformation of a medium on which the test patterns are printed, and information processing means for determining the amount of transparent liquid to be jetted by the transparent liquid jet means for jetting the transparent liquid, from the information representing the amount of medium deformation acquired by the information acquisition means.

Abstract: Provided are a wiping mechanism, a liquid droplet jetting apparatus, and a wiping method capable of preventing infiltration of bubbles into a nozzle when a nozzle surface is wiped by a wiping member. A wiping member (200) comes into contact with a nozzle surface (78) with a nozzle through which liquid droplets are jetted and is formed by weaving weft yarns (220) and warp yarns (210), in which the wiping member (200) in which the weft yarns (220) are further exposed to the nozzle surface (78A) side than the warp yarns (210) is moved relative to the nozzle surface (78A) along the warp yarns (210).

Abstract: A printed product is produced by applying at least one colored and water-containing ink to image regions on a printing material in a drop-on-demand process, applying a substantially colorless and water-containing liquid a) to non-image regions and/or b) to image regions that have little ink in a drop-on-demand process and drying the printing material. In this case, the printing material has a coating with at least one acid. After applying ink and applying the liquid, a water-containing further liquid is applied both to image regions and to non-image regions of the printing material. The first-mentioned liquid and/or the further liquid contains at least one substance for at least partly neutralizing the acid. The undesired formation of crease waves or curls and glossiness fluctuations between varnished image areas and varnished non-image areas is thus advantageously avoided.

Abstract: In an ink jet recording device in which a paper supporting part is constituted by a first support and a second support having a comb teeth structure, a region where paper is supported by only the first support is defined as a first region, a region where the paper is supported by only the second support is defined as a second region, and a region where the paper is supported by the first support and the second support is defined as a third region. Charts including a plurality of grayscales for the respective regions are drawn. The respective drawn charts are read by an image reader. Correction values of density unevenness are obtained for the respective regions on the basis of the reading results. Density data of an image are corrected for the respective regions on the basis of the correction values of the density unevenness for the respective regions.

Abstract: When a liquid ejection head and a first wiping unit are moved relatively to clean a surface, the first wiping unit making a first wiping member travel in a first direction, a direction opposite to the first direction is used as a moving direction of the head with reference to the first wiping member in relative moving therebetween. When the head and a second wiping unit are moved relatively to each other to clean the surface, the second wiping unit making a second wiping member travel in a second direction having a component of a direction opposite to the first direction, a direction opposite to the second direction is used as a moving direction of the head with reference to the second wiping member in relative moving therebetween to move the second wiping unit and the head relatively to clean the same area on the surface.