Abstract: In a rotary stencil printing press including a rotary screen cylinder which supports a screen printing forme and is supported rotatably, and a squeegee which is located within the rotary screen cylinder and, when printing is done, contacts an inner peripheral surface of the screen printing forme to transfer ink stored within the rotary screen cylinder to a web via holes of the screen printing forme and, when printing is stopped, leaves the inner peripheral surface of the screen printing forme, throw-on and throw-off of the squeegee with respect to the inner peripheral surface of the screen printing forme, and adjustment of the position of the throw-on are performed by motors.

Abstract: A register adjusting apparatus for a rotating body, which can easily perform register adjustment while enabling motor driving with an inexpensive mechanical configuration, is provided. The register adjusting apparatus comprises: a pair of inner bearings (4, 6) rotatably supporting opposite end portions of a plate cylinder (7), and provided at a position eccentric by the same amount with respect to the axis of the plate cylinder; cylinders (11A, 11B) for pivoting the inner bearings; an outer bearing (3) supporting one of the inner bearings (4), and eccentric with respect to the center of the inner bearing; a motor (15) for pivoting the outer bearing; a motor (70), provided on a shaft end (7B) of the plate cylinder on the side of the other inner bearing (6), for rotationally driving the plate cylinder; and a pin (73) provided in the inner bearing (6) and engaging a slot (72) of the motor, and the slot permits movement of the plate cylinder which is moved when driven by the motor (15).

Abstract: An ink fountain device includes a fountain roller, a blade, a pair of ink dams, a compression coil spring, and a fountain roller moving device. The fountain roller is rotatably supported by an eccentric bearing. The blade is arranged close to the fountain roller. The distal end of the blade forms a clearance, with respect to an outer surface of the fountain roller, where ink is to be supplied. The pair of ink dams are arranged to be substantially perpendicular to the blade and oppose each other in an axial direction of the fountain roller, and are supported to be movable toward and away from the outer surface of the fountain roller. The compression coil spring biases the ink dams to move toward the outer surface of the fountain roller. The fountain roller moving device pivots the eccentric bearing so as to move the fountain roller.

Abstract: An intaglio printing press includes, a rotary screen comprising a hollow cylinder, which has a small hole group for special ink supply formed in a circumferential surface of the hollow cylinder and which is supported rotatably, and a squeegee contacting an inner peripheral surface of the hollow cylinder, a rubber roller supported rotatably to oppose an outer peripheral surface of the hollow cylinder at a position where the squeegee contacts the inner peripheral surface of the hollow cylinder, and a sheet supplied with special ink, which has been stored within the hollow cylinder, by the squeegee via the small hole group of the hollow cylinder. The intaglio printing press further includes special ink guide means, such as guide grooves, for guiding a surplus of the special ink, which is not supplied to the sheet by the squeegee, to the small hole group of the hollow cylinder.

Abstract: An ink feed control method for a printing press in which ink, supplied to an ink fountain roller from a gap between each ink fountain key and the ink fountain roller by the rotation of the ink fountain roller, is supplied to the printing plate by swing operation of an ink ductor roller, so that a print is eventually made on a print sheet with the ink supplied to the printing plate, the method including the steps of: measuring any one of the density and the ink film thickness of a first printing product made by the printing press; and controlling the number of times of the swing operation of the ink ductor roller relative to the rotation of the printing press in accordance with the value of the measured one of the density and the ink film thickness of the first printing product.

Abstract: In a rotary screen device in which ink is transferred through holes of a screen, with a rotary screen cylinder provided with the screen being rotated, to carry out printing, the rotary screen cylinder is stopped, in accordance with a stop signal, at a position at which a pattern-free portion (a hole-free portion) of the screen comes to a lowermost position. Since the rotation of a stencil printing press is stopped in a rotation phase in which the pattern-free portion of the screen comes to the lowermost position, ink is prevented from dripping through the holes of the screen.

Abstract: An information recording medium supply apparatus comprises: a gravure plate cylinder supported having recessed image areas formed in the circumferential surface thereof; an ink roller for supplying ink from an ink reservoir to the circumferential surface of the gravure plate cylinder; a doctor for removing surplus ink adhering to non-image areas of the gravure plate cylinder; an impression cylinder supported rotatably and adapted to transfer the ink in the image areas to a sheet being transported in cooperation with the gravure plate cylinder; and an IC chip supply device for supplying an IC chip to the ink in the image area on a side downstream of the point of removal of the ink by the doctor in the rotating direction of the gravure plate cylinder, and on a side upstream of the point of contact with the impression cylinder in the rotating direction of the gravure plate cylinder.

Abstract: Provided is an intaglio printing press including: a gravure printing device, which performs gravure printing on one surface of a sheet of paper; dryers, which dry the one surface of the sheet of paper, on which gravure printing is performed by the gravure printing device; an intaglio printing device, which performs intaglio printing on the sheet of paper having been dried by the dryers; and a printing surface switching device, which transfers the sheet of paper from the gravure printing device to the intaglio printing device in a manner that a surface of the sheet of paper on which the intaglio printing device performs intaglio printing is switched between any one of the one surface and the other surface of the sheet of paper.

Abstract: A sheet-fed printing press comprises: a screen printing unit for printing one surface of a sheet being transported; a drying unit, provided downstream of the screen printing unit in a transport direction, for drying the screen-printed one surface of the sheet; a gravure printing unit, provided downstream of the drying unit in the transport direction, for performing printing on the dried sheet; and a reversing unit, provided between the drying unit and the gravure printing unit, for switching between double-sided printing in which the other surface on the side opposite to the screen-printed one surface of the sheet is gravure-printed, and single-sided printing in which the screen-printed sheet is reversed, and the one surface of the reversed sheet is gravure-printed.

Abstract: An oscillation amount adjusting device for an oscillating roller has a sleeve detent plate for restraining the rotation of a sleeve. An operator manually loosens a sleeve locking bolt to render the sleeve rotatable relative to a rotating shaft supporting the sleeve. The rotation of the sleeve is restrained by the sleeve detent plate. In this state, the rotating shaft supporting the sleeve is rotated by an oscillation drive motor to adjust the oscillation amount of oscillating rollers.

Abstract: A printing press includes, a printing unit; a motor for driving the printing unit; a first drive system for drivingly connecting a blanketed impression cylinder, etc. of the printing unit to the motor; a first frame cover for covering the first drive system; an inker movable to be capable of being thrown on and thrown off the printing unit; a second drive system for driving ink rollers of the inker; and a second frame cover for covering the second drive system, the printing press further includes a motor for driving the ink rollers of the inker via the second drive system, and wherein opposed surfaces of the first frame cover and the second frame cover are entirely closed.

Abstract: An inking device of a printing press, including an ink ductor roller reciprocating between a receipt position, at which the ink ductor roller contacts an ink fountain roller to receive ink, and a transfer position, at which the ink ductor roller contacts an ink distribution roller or a first intermediate roller located downstream in an ink transfer direction to pass the ink on to the roller, comprises: a pair of split clamping holders supporting the ink ductor roller and supported swingably; and moving means, comprising a shaft, a sleeve, a bearing portion, a worm wheel, a worm shaft, and an operating shaft having a dial-equipped handle, for moving the pair of split clamping holders in the axial direction of the ink ductor roller.

Abstract: An oscillation amount adjusting device for an oscillating roller has a sleeve detent plate for restraining the rotation of a sleeve. An operator manually loosens a sleeve locking bolt to render the sleeve rotatable relative to a rotating shaft supporting the sleeve. The rotation of the sleeve is restrained by the sleeve detent plate. In this state, the rotating shaft supporting the sleeve is rotated by an oscillation drive motor to adjust the oscillation amount of oscillating rollers.

Abstract: An ink fountain device includes a fountain roller, a blade, a pair of ink dams, a compression coil spring, and a fountain roller moving device. The fountain roller is rotatably supported by an eccentric bearing. The blade is arranged close to the fountain roller. The distal end of the blade forms a clearance, with respect to an outer surface of the fountain roller, where ink is to be supplied. The pair of ink dams are arranged to be substantially perpendicular to the blade and oppose each other in an axial direction of the fountain roller, and are supported to be movable toward and away from the outer surface of the fountain roller. The compression coil spring biases the ink dams to move toward the outer surface of the fountain roller. The fountain roller moving device pivots the eccentric bearing so as to move the fountain roller.

Abstract: In an oscillating roller swing device including an oscillating roller, a rotating shaft having an inclined shaft portion, a cylindrical sleeve rotatably supported on the inclined shaft portion of the rotating shaft, a disk rotatably supported on the sleeve, and an oscillation drive motor for rotating the rotating shaft, an oscillation amount adjusting device for an oscillating roller comprises: a fitting groove provided in the sleeve; a parallel shaft portion having an axis parallel to the axis of the oscillating roller; a rotating member rotatably supported on the parallel shaft portion and provided with a fitting protrusion engaging the fitting groove of the sleeve; and an oscillation amount adjusting motor for rotating the rotating member relative to the rotating shaft.

Abstract: Gap guards are attached to a notch of an impression cylinder in such a manner as to allow grippers to project from inside the notch, and have respective guide surfaces. The guide surfaces extend between a circumferentially first end portion and a second end portion of the notch and have a curvature substantially equal to that of the outer circumferential surface of the impression cylinder. The guide surfaces are flush with the outer circumferential surface of the impression cylinder at the second end portion, whereas a clearance is formed between the guide surfaces and the outer circumferential surface of the impression cylinder at the first end portion. Grippers have respective guide surfaces. The guide surfaces have a curvature substantially equal to that of the outer circumferential surface of the impression cylinder such that the guide surfaces are flush with the outer circumferential surface of the impression cylinder at the first end portion.

Abstract: An oscillation amount adjusting device for an oscillating roller has a sleeve detent plate for restraining the rotation of a sleeve. An operator manually loosens a sleeve locking bolt to render the sleeve rotatable relative to a rotating shaft supporting the sleeve. The rotation of the sleeve is restrained by the sleeve detent plate. In this state, the rotating shaft supporting the sleeve is rotated by an oscillation drive motor to adjust the oscillation amount of oscillating rollers.

Abstract: Gap guards are attached to a notch of an impression cylinder in such a manner as to allow grippers to project from inside the notch, and have respective guide surfaces. The guide surfaces extend between a circumferentially first end portion and a second end portion of the notch and have a curvature substantially equal to that of the outer circumferential surface of the impression cylinder. The guide surfaces are flush with the outer circumferential surface of the impression cylinder at the second end portion, whereas a clearance is formed between the guide surfaces and the outer circumferential surface of the impression cylinder at the first end portion. Grippers have respective guide surfaces. The guide surfaces have a curvature substantially equal to that of the outer circumferential surface of the impression cylinder such that the guide surfaces are flush with the outer circumferential surface of the impression cylinder at the first end portion.

Abstract: A roller holding apparatus of a printing press comprises roller arms swingably supported by a metal roller, holders swingably supported by the roller arms for holding a rubber roller so as to be detachably mounted on the roller arms, and pressing members provided in the holders for pressing the rubber roller against the metal roller. The roller holding apparatus can perform roller replacement easily and quickly with a simple structure, and can always retain a set nip pressure.

Abstract: A printing press comprises an oscillating roller capable of rotating circumferentially and moving axially in a reciprocating manner, and does rainbow printing on a sheet, supplied from a feeder, in a printing unit. The printing press includes an oscillation width control device and an oscillation frequency control device for exercising control such that the oscillating roller moves axially in a reciprocating manner when printing is started in a state in which the axially moving motion of the oscillating roller is at a standstill. The printing press can automatically start the oscillating motion of the ink oscillating roller when printing is started from the state of the oscillating motion of the oscillating roller being stopped at the time of ink conditioning in rainbow printing, thereby decreasing the number of defective sheets and improving the ease of operation.