Abstract: The present invention has a problem of suppressing liquid gathering of an interpolation dot which interpolates a discharge defective nozzle and preventing deterioration of image quality, and the problem is solved by the present invention including: an inkjet head configured to separately discharge a large droplet, a medium droplet, and a small droplet from each of a plurality of nozzles; and a control unit which forms an image in a single-pass system by discharging the medium droplets from the plurality of nozzles respectively, and forms an interpolation dot to interpolate a discharge defective nozzle by discharging a droplet from a different nozzle when the discharge defective nozzle is present, the control unit forming the interpolation dot to interpolate the discharge defective nozzle with the use of the large droplet and forming at least one adjacent dot which is in contact with the interpolation dot with the use of the small droplet.

Abstract: An inkjet recording device includes a recorder which discharges ink from a plurality of recording elements disposed in each of a plurality of recording heads onto a recording medium, the ink changing a phase between a solid and a liquid; a mover which causes the recording medium and the plurality of recording heads to move relative to each other; and a hardware processor which performs record control causing each of the plurality of recording elements disposed in the plurality of recording heads of the recorder to perform an output operation of discharging or not discharging ink onto the recording medium which moves relative to the recording heads in a predetermined movement direction according to a pixel value of image data.

Abstract: An image forming apparatus includes the following. A recorder applies a colorant to a recording medium in accordance with a recording operation of a plurality of recording devices. An image-formation controller instructs the recorder to form a combined image including a plurality of normal images and a test image on the recording medium, the normal image being laid out in a recording area on the recording medium. A reader reads the images formed on the recording medium. A failure detector detects a recording operation failure of any of the recording devices based on the test image read by the reader. A determiner determines the quality of each of the normal images based on the detected result of the recording operation failure by the failure detector and positional information on the images in the combined image.

Abstract: An inkjet recording device includes a recorder which discharges ink from a plurality of recording elements disposed in each of a plurality of recording heads onto a recording medium, the ink changing a phase between a solid and a liquid; a mover which causes the recording medium and the plurality of recording heads to move relative to each other; and a hardware processor which performs record control causing each of the plurality of recording elements disposed in the plurality of recording heads of the recorder to perform an output operation of discharging or not discharging ink onto the recording medium which moves relative to the recording heads in a predetermined movement direction according to a pixel value of image data.

Abstract: An inkjet recording device includes a hardware processor. The hardware processor: performs, for respective recording heads of a recorder, setting relevant to adjustment of an amount of ink to be discharged from nozzle groups; based on ink discharge amount information on a distribution of ink discharge amounts that are discharged from the nozzle groups based on image data, performs the setting such that at each joint in the nozzle groups, a difference between representative values of the ink discharge amounts of the nozzle groups satisfies a predetermined continuity condition, and a representative value of the ink discharge amounts of the nozzle groups satisfies a predetermined discharge amount condition; and adjusts at least a part of the setting such that a difference between a maximum value and a minimum value of the ink discharge amounts of the nozzle groups reduces.

Abstract: Provided are an image forming apparatus and a quality determination method by which the quality of each of a plurality of normal images allocated to a recording medium can be easily and appropriately determined.

Abstract: An ink jet recording apparatus includes an ejector, a fixing unit, a reversing unit and a hardware processor. The ejector performs an ejection operation of ejecting a color material and an overcoat material onto a recording medium. The fixing unit fixes the overcoat material, thereby forming an overcoat on the medium. The reversing unit reverses the medium. The processor causes the fixing unit to form the overcoat on one side of the medium after causing the ejector to perform the ejection operation on the one side at a predetermined ejection position, causes the reversing unit to reverse the medium with the overcoat formed on the one side, and causes the fixing unit to form the overcoat on the other side of the medium after causing the ejector to perform the ejection operation on the other side at the ejection position.

Abstract: A color conversion device includes color conversion sections, an obtaining section and a reconversion section. The color conversion sections perform color conversion in parallel to convert colors of pixels contained in image data of a predetermined number of rows. The predetermined number is two or more. For the color conversion, at least one color conversion section uses certain color conversion information, and the other color conversion section uses other color conversion information having an information amount less than that of the certain color conversion information. The obtaining section obtains attribute information indicating an attribute of each of the pixels. When the attribute information is predetermined attribute information, the reconversion section converts a pixel color-converted with the other color conversion information using a pixel color-converted with the certain color conversion information in a predetermined pixel area contained in the image data.

Abstract: An image forming device includes an image forming section which includes a recording head having nozzles and which forms an image on a recording medium by discharging ink from the nozzles, a scanning section which scans the image formed on one face of the recording medium, a conveying section which conveys the recording medium for the recording medium to pass by the image forming section and the scanning section with its one face facing them, and an inverting section which inverts the recording medium having the image formed on one face thereof and conveys the recording medium to the upstream of the image forming section. The scanning section is disposed downstream of the image forming section and upstream of the inverting section. The image includes a test chart as a pattern image for detection of nozzle clogging.

Abstract: A fluid dynamic bearing device (21) includes: a shaft member (22); a housing (29) as an outer member which is arranged on a radially outer side of the shaft member (22) and is opened at both ends; a radial bearing gap which is formed on a radially inner side of the housing (29) and faces an outer peripheral surface of the shaft member (22); and a lid member (30) closing an opening on one end side of the housing (29), wherein the lid member (30) is fitted to an outer peripheral surface of the housing (29) with a fastening allowance which does not affect accuracy of a surface defining an outer diameter dimension of the radial bearing gap so that the housing (29) and the lid member (30) are bonded and fixed to each other.

Abstract: A color conversion device includes color conversion sections, an obtaining section and a reconversion section. The color conversion sections perform color conversion in parallel to convert colors of pixels contained in image data of a predetermined number of rows. The predetermined number is two or more. For the color conversion, at least one color conversion section uses certain color conversion information, and the other color conversion section uses other color conversion information having an information amount less than that of the certain color conversion information. The obtaining section obtains attribute information indicating an attribute of each of the pixels. When the attribute information is predetermined attribute information, the reconversion section converts a pixel color-converted with the other color conversion information using a pixel color-converted with the certain color conversion information in a predetermined pixel area contained in the image data.

Abstract: A threshold matrix generating method includes: generating q(x, y, g) in which the number of dots in an initial dot pattern is varied; calculating an error matrix (ERR(x, y, g)) of q(x, y, g); calculating AVE(a, b) representing the uniformity of the number of dots in discrete blocks into which the dot pattern has been divided; determining two pixels, of which the dot positions are to be swapped, on the basis of ERR (x, y, g) and AVE(a, b); swapping the dot positions; calculating the evaluation value (MSE(n)) of q(x, y, g) after the positional swapping; and repeating the positional switch of the dots repeating the generation of q(x, y, g) and the positional swapping of the dots with q(x, y, g) functioning as the initial dot pattern until a q(x, y, g) satisfying MSN(n)<MSN(n?1) is obtained.

Abstract: An image processing apparatus to perform a screen process on color image data using threshold matrices includes an address calculation section, threshold processor and shift section. The address calculation section calculates an address in the threshold matrix. The threshold processor acquires a threshold by the address, and performs an n-valued process (n?2) on a pixel value using the threshold. The shift section divides the image data into blocks in units of the threshold matrix, determines shift amounts for each block, and shifts the address. The threshold processor acquires a threshold by an address after the shift for at least one color, and performs the n-valued process using the threshold. The threshold matrix for a color for which the address is shifted has a screen ruling with a lower number of lines than the address is not shifted.

Abstract: It is an object of the present invention to provide a bearing member having a highly accurate dynamic pressure generating portion stably at low cost. Dynamic pressure grooves (8a1) and (8a2) are formed as the dynamic pressure generating portions on an inner circumferential surface of the electroforming portion (10) by an electroforming process, and injection molding is performed by using a resin while inserting the electroforming portion (10), thereby forming a bearing member (8). A shaft member (2) is inserted into an inner circumference of the bearing member.

Abstract: An inner peripheral surface and a lower end surface of a bearing sleeve made of a sintered metal are each formed into a smooth cylindrical surface or a flat surface that does not have a dynamic pressure generating portion. Thus, a step of forming the dynamic pressure generating portion can be omitted from a manufacturing step of the bearing sleeve, and cost of dies can be markedly reduced. Further, the inner peripheral surface of the bearing sleeve is formed into the smooth cylindrical surface, and hence a radial dynamic pressure generating portion is formed on an outer peripheral surface of a shaft member. However, the outer peripheral surface of the shaft portion is accessible to tools, and hence the radial dynamic pressure generating portion can be formed easily with high accuracy. As a result, accuracy of a radial bearing gap is enhanced so that a bearing rigidity is enhanced.

Abstract: A steam generator having a heat transfer tube group formed of a plurality of U-shaped heat transfer tubes; an annular channel formed to cover the circumference of the heat transfer tube group; the annular channel having an opening that communicates with the heat transfer tube group; a water supply unit disposed at an upper portion of the annular channel and supplies water to a descending-side portion; a steam/water separator disposed above the heat transfer tube group; and an air bubble removing member for removing air bubbles provided in the annular channel.

Abstract: A seal member is fixed to a predetermined position on an outer peripheral surface of a shaft portion. During rotation of a shaft member, a lower end surface of the seal member is opposed to an upper end surface of a bearing sleeve through an intermediation of a thrust bearing gap to form a second thrust bearing gap. An outer peripheral surface of the seal member defines between itself and an inner peripheral surface of an upper end portion of a housing a seal space having a predetermined volume.

Abstract: A housing for a fluid lubrication bearing apparatus is produced. The housing has a cylindrical shape whose inner periphery having a fixing face to which an outer circumferential surface of a bearing sleeve is to be fixed. The method includes providing a forging mold having a groove molding portion extending parallel to a direction of a stroke of said mold and a face molding portion having a convex cylindrical shape on an outer periphery of the forging mold for forming the fixing face of the housing. The method further includes forming the housing with the forging mold, while forging circulation grooves and the fixing face simultaneously on the inner periphery of the housing with the groove molding portion and the face molding portion of the forging mold.

Abstract: A fluid bearing apparatus includes a housing 7 which has a cylindrical shape having a fixing face 7c for fixing the outer circumferential surface 8b of a bearing sleeve 8, and axial circulation grooves 7d for bringing both end faces 8c, 8d of the bearing sleeve 8 into circulation on the inner periphery by forging. A groove molding portion 18a2 is provided on the outer circumference of a rod 18 which serves as a forming mold for the inner periphery of the housing 7, and the circulation grooves 7d are formed by forging with this groove molding portion 18a2. Moreover, after a sealing face 107d and a cylindrical outer circumferential surface 107e provided on the outer periphery of the housing 107 are formed by forging, an inner circumferential surface 107c is formed by forging.

Abstract: A fluid dynamic bearing device (21) includes: a shaft member (22); a housing (29) as an outer member which is arranged on a radially outer side of the shaft member (22) and is opened at both ends; a radial bearing gap which is formed on a radially inner side of the housing (29) and faces an outer peripheral surface of the shaft member (22); and a lid member (30) closing an opening on one end side of the housing (29), wherein the lid member (30) is fitted to an outer peripheral surface of the housing (29) with a fastening allowance which does not affect accuracy of a surface defining an outer diameter dimension of the radial bearing gap so that the housing (29) and the lid member (30) are bonded and fixed to each other.