Abstract: A printing plate holding apparatus is provided which during a high speed printing operation reduces vibrations and noises caused in a groove for having a grip leading end and a grip trailing end of a printing plate inserted therein, which can fasten the printing plate with greater certainty, and which is suitable for the printing plate to be held securely on such as a sleeve cylinder whose weight reduction is demanded.

Abstract: An inkjet printer 100 that carries out printing with respect to long continuous paper X provided with a perforation M at every page break and provided with marginal punch holes P in both sides, the inkjet printer having: a paper feeding unit 1 that disposes the Z-folded continuous paper X; a first pull roller 2a and a second pull roller 2b for conveying the continuous paper X; a pin tractor 3 for positioning the continuous paper X; a speed-variable motor 4 for applying tension to the continuous paper X; a printing unit 5 that carries out printing on the continuous paper X by a print head; and a discharging unit 6 that Z-folds and discharges the continuous paper X by a folding machine 61.

Abstract: A printing cylinder assembly for a printing machine includes a rotating shaft pivotally supported at one axial end shaft section thereof in a cantilever structure, and a sleeve cylinder removably mounted on the rotating shaft so that the cylinder can be fitted on and extracted from the rotating shaft from the other axial end side of the rotating shaft. The rotating shaft is formed at one axial end side thereof with a sleeve cylinder supporting tapered surface, and the sleeve cylinder is formed at one axial end side of an inner diameter portion thereof with a tapered surface, whereby the tapered surface of the sleeve cylinder can be fitted on and in close contact with the sleeve cylinder supporting tapered surface of the rotating shaft and thereby detachably coupling one axial end portion of the sleeve cylinder with one axial end portion of the rotating shaft.

Abstract: A manufacturing device of a laminated label body. The manufacturing device of a laminated label body includes a paper feeding portion, a peeling device, a winding portion, and a lamination device. The release paper to which a label is stuck is conveyed by the paper feeding portion, and the release paper is wound by the winding portion and is conveyed while being folded back around a tip end portion of a peeling plate of the peeling device, whereby the label is peeled off from the release paper. The peeled-off label is conveyed to the lamination device having two rolls provided on a downstream side of the peeling plate. The lamination device manufactures the laminated label body by overlapping a rear end portion of the preceding label and a tip end portion of the subsequent label and by sticking them each other.

Abstract: An arm for guiding paper fed along a paper feed path is swingably supported at its base end portion on one side of the winding core. The arm is provided with a free roll, on which the paper is guided to pass onto the winding core. At its free end portion, the arm has a roller rotatably mounted thereon which constitutes a body of rotation contacting with the paper roll so that with the winding core rotated and with the roller pressed against the paper roll the paper may be wound up into the paper roll on the rotating winding core without the occurrence of a paper winding wrinkle, whereby with a distance held constant at all times between the feed roll and the roller along a paper winding path, paper winding without such wrinkling can be achieved to yield a paper roll that is large in its maximum diameter.

Abstract: A booklet making method includes: cutting a web of paper on one side and on another side into first and second continuous sheets, alternately bonding the first and second continuous sheets widthwise with a setting paste and a throwaway paste to form a double set continuous sheet of paper, and cutting the double set continuous sheet of paper into split double sheets of a selected longitudinal length. A plurality of split double sheets is integrally bound with an integrating paste to form a booklet-like product. Portions of the booklet-like product which are pasted and bonded with the throwaway paste are cut off to provide a plurality of booklets. Thus, by the booklet making method, booklets having an odd number of leaves or pages are formed without waste of paper and with reduced paper jams.

Abstract: The transfer inkjet printer device includes an intermediate transfer body including an intermediate transfer surface capable of moving along a rotation route; an inkjet head used to discharge ink including toner particles onto the intermediate transfer surface at a first area in the rotation route in a state where the toner particles are charged, so as to form an intermediate image composed of an ink layer on the intermediate transfer surface; a pressure device used to press the ink layer of the intermediate image on the intermediate transfer surface, onto a surface of a recording medium at a second area in the rotation route; and an electric field application device used to electrophorese the charged toner particles in the ink layer of the intermediate image toward the recording medium at the second area.

Abstract: A variable printing machine for printing images different in top-bottom length with a plate and a blanket cylinder changed in diameter, is provided in which the plate and blanket cylinders and an impression cylinder can be brought into a proper state of contact with one another. Each of a plate cylinder shaft 20 and a blanket cylinder shaft 30 has its one axial end portion supported in a cantilever structure from a main frame 1 of the machine. When the plate cylinder sleeve 21 and the blanket cylinder sleeve 31 are each exchanged with one of different diameter, the blanket cylinder shaft 30 and the impression cylinder 4 are moved relative to each other so that the plate cylinder 2 and the blanket cylinder 3 may be brought into a proper state of contact with each other and so are the blanket cylinder 3 and the impression cylinder 4.

Abstract: A wet type developing apparatus is provided which allows printing in a quality that is stable at an increased printing speed and also with changes in physical property of a liquid developer. The wet type developing apparatus to this end includes a liquid developer feed pathway which comprises a developing roller 7 for feeding the liquid developer onto a photoconductor drum 3; an anilox roller 9 immersed in part in the liquid developer and driven to rotate in rotational contact with the developing roller; and a doctor blade 11 disposed in contact with a surface of the anilox roller for controlling the rate of drawing up of the liquid developer. The developing and anilox rollers have their peripheral surfaces moving in an identical direction and at an identical rate of movement in an area of their rotational contact.

Abstract: A printing plate holding apparatus is provided which during a high speed printing operation reduces vibrations and noises caused in a groove for having a grip leading end and a grip trailing end of a printing plate inserted therein, which can fasten the printing plate with greater certainty, and which is suitable for the printing plate to be held securely on such as a sleeve cylinder whose weight reduction is demanded.

Abstract: A label paper processing apparatus includes a paper supply unit for supplying and feeding label paper, a digital printing unit for printing the label paper, a laser processing unit, and a pair of loop forming unit disposed between the paper supply unit and the digital printing unit, and between the digital printing unit and the laser processing unit, respectively, each forming a loop of the label paper. The laser processing unit is designed to half-cut the printed label paper and to form cutouts of a shape along a printed cutting locus with a laser beam so as to scan and trace the printed cutting locus, thereby facilitating control in half-cutting of the label paper. The loop forming unit is designed to form a loop of the label paper and to hold a length of the loop substantially constant so as to control feeding of the label paper.

Abstract: A method of half-cut cutout processing of label paper 1 is disclosed that allows laser beam 11 to cut a label sheet 3 of the label paper 1 into a given cutout shape without damaging a supporting sheet 2. In the method, a cutting locus 30 along contours of the cutout shape is printed on a surface of the label sheet 3 in a single color which is darker than or equal in darkness to a color that is the darkest of colors in portions to be cut, and then the cutting locus 30 printed is irradiated with the laser beam, thereby cutting the label sheet 3 selectively into the cutout shape.

Abstract: A deaerator and a density detector are provided in a liquid developer circulating path through which the liquid developer in a main tank is circulated, wherein the deaerator includes a bundle of hollow fibers each forming a hollow fiber membrane whose inside is depressurized and over whose outer peripheral surface the liquid developer is forced to flow under pressure, thereby sufficiently removing dissolved air in the liquid developer, and a toner density of the liquid developer is detected when the liquid developer of which dissolved air is sufficiently removed is passed through the density detector utilizing ultrasonic waves, making it possible to detect the toner density with a high degree of precision.

Abstract: Fluttering of paper traveling opposite to and parallel to a nozzle width region of an ink jet head is held down, thereby improving the printing quality. An ink jet recording apparatus comprises an ink jet printer including printing units whereby a sheet of paper traveling in a paper passage in the form of an arch shaped by a plurality of guide rollers is printed by a plurality of ink jet heads. The ink jet heads of the printing units comprise ink jet heads of on-demand type having a plurality of nozzle rows of a nozzle width region in a direction of travel of paper. The paper passage opposite to nozzle faces of each ink jet head nozzle defined by two guide rollers positioned at an upstream and at a downstream side in the direction of travel of paper, respectively.

Abstract: An inkjet recording apparatus 100 is provided with a fabric feeding section A having a medium for recording 1 composed of a fabric, an inkjet section B for performing inkjet recording on the medium for recording 1 fed from the fabric feeding section A to form a recorded medium 1a, and a treating section C1, C2 having a drying section 11, 21 for drying the recorded medium 1a and a collecting section 12, 22 for collecting the dried recorded medium, the drying section 11, 21 and the collecting section 12, 22 being integrated with each other, where the treating section C1, C2 is attachable to and detachable from the inkjet section B.

Abstract: An inkjet recording apparatus of a line head type where a resolution can be changed simply, and locating of nozzles can be performed simply and accurately is provided.

Abstract: In an electrophotographic sheet-fed front/back printing machine which is capable of duplex printing and which can be installed in a reduced space, sheets of paper fed from a sheet supply are fed out by a sheet transport conveyer onto an impression cylinder of an electrophotographic printing section in which each of the sheets are printed on one side. The sheets printed on one side are turned over from front to back by a sheet turnover transport unit and are allowed to fall and be supplied onto the sheet transport conveyer. The sheets are each fed again onto the impression cylinder and printed on the remaining other side. Sheets printed on both sides are transported by a printed-sheet transport unit to a print output receptacle in which they are received.

Abstract: A printing cylinder assembly for a printing machine includes a rotating shaft pivotally supported at one axial end shaft section thereof in a cantilever structure, and a sleeve cylinder removably mounted on the rotating shaft so that the cylinder can be fitted on and extracted from the rotating shaft from the other axial end side of the rotating shaft. The rotating shaft is formed at one axial end side thereof with a sleeve cylinder supporting tapered surface, and the sleeve cylinder is formed at one axial end side of an inner diameter portion thereof with a tapered surface, whereby the tapered surface of the sleeve cylinder can be fitted on and in close contact with the sleeve cylinder supporting tapered surface of the rotating shaft and thereby detachably coupling one axial end portion of the sleeve cylinder with one axial end portion of the rotating shaft.

Abstract: A waste removing method capable of easily carrying out a waste removing operation to peel a label sheet waste off a base sheet. A label sheet 4b of label paper 4 being conveyed along a path of label paper conveyance 1 is formed with a cut line 4h for peeling-off; an upstream side portion 4i of label sheet bordered and starting with the cut line 4h is peeled off a base sheet 4a, and the portion of label sheet 4b peeled off is carried to and wound onto a waste take-up member 20 whereby winding the peeled-off portion of label sheet 4b onto the waste take-up member 20 causes a label sheet waste 4g of succeeding label paper 4 to be peeled off the base sheet 4a and taken up onto the waste take-up member. The waste removing operation can be carried out automatically.

Abstract: An electrophotographic apparatus and method that can effect favorable transfer of a toner image onto a medium under a nip pressure between a transfer roller and a backup roller and a potential difference between the transfer and backup rollers even if the medium has a high insulating property, such as due to its being thick.