Abstract: A guiding device for an areal printing material, the guiding device having an areal structure with a guide surface facing towards the printing material, and wherein the areal structure includes a supporting layer, and a surface layer is provided for forming the guide surface and covering the supporting layer; and a rotary printing machine equipped with the guiding device.

Abstract: In a device for guiding sheets in a sheet-fed apparatus, preferably, a rotary printing press, sheet guide elements that are charged with blasted air are disposed at the sheet guide cylinder, and the air blast nozzles include a combination of conventional free jet nozzles and throttled nozzles, which are independently charged with different pressure levels.

Abstract: A group of banknotes aligned and stacked on a longitudinal axis is positioned at the work station of a banding device by a clamp type gripper that compresses a first longitudinal portion of the group along the direction of the axis, ready to be secured with at least one band of strip material; as the compressive force is applied, parts of the notes forming a second longitudinal portion of the group, not directly compressed by the gripping device, are caused to fan out at the top and bottom ends of this same second portion, and accordingly, the banding device includes a finger and a locating surface impinging respectively on the two ends of the second portion and operating in conjunction to compact and smooth the parts of the banknotes coinciding with these same ends.

Abstract: A printing unit (1) for a printing machine, having an image cylinder (2), an image generating device (3) for setting an image on the peripheral surface (4) of the image cylinder (2), and an image transfer cylinder (5) which transfers the image from the image cylinder (2) to a printing substrate (6), the image transfer cylinder (5) having a resilient cover (7) which exhibits a deformation (10, 10′) in the force transmission areas (8, 9), and a transport belt (11) that carries the printing substrates (6) and is supported by a back-pressure cylinder (12) driving the image transfer cylinder (5) and the latter driving the image cylinder (2), by friction. The printing unit has a continuous image cylinder speed (v(ü)).

Abstract: A device for reducing the noise emissions of a machine for printing flat material, wherein flat material is transportable across an impression cylinder, comprising at least one muffling element disposed across a portion of a transport path of the flat material extending along the impression cylinder, directly behind or downline from a nip, as viewed in the direction of the transport path, and at a spaced distance from the impression cylinder; and a machine including the device.

Abstract: A platesetting system and method comprising a pair of dual capstan rollers that receives a recording medium and records an image on the received medium as the medium is transported through the system. The system and method advantageously enable at least a portion of the image to extend from a leading edge of the medium to a trailing edge of the medium.

Abstract: A powder apparatus for a printing press includes delivery chains or a transfer cylinder, spray nozzles, and a circular columnar rotary member or transfer cylinder. The delivery chains or transfer cylinder has gripper units or grippers for holding and moving in a sheet convey direction a sheet having a printing surface. The spray nozzles spray a powder toward the printing surface of the sheet which is being conveyed by the delivery chains or transfer cylinder. The rotary member or transfer cylinder is provided downstream of the spray nozzles in the sheet convey direction and is supported rotatably. The rotary member or transfer cylinder has at least one notch that opposes the gripper units or grippers, during rotation, which move along with sheet convey operation.

Abstract: An image recording apparatus comprises a rotary drum for attracting a recording medium to the surface thereof on which a plurality of through holes are formed, the rotary drum for attracting the recording medium via the plural holes by reducing pressure therein, a laser head for emitting a laser beam toward the recording medium on the rotary drum to record an image thereon; and a dummy sheet having an attracting area in which a plurality of through holes are formed, the area having a size substantially equal to the recording medium, the dummy sheet placed between the recording medium and the surface of the rotary drum such that the recording medium is placed on the attracting area and such that the plural through holes of the attracting area and the plural through holes of the rotary drum are superposed.

Abstract: In a method for conveying sheets in a sheet-printing machine, the sheets are held securely in position on a circumferential surface of sheet-guiding cylinders with the aid of an adhesive, which can be detached again a number of times and does not transfer itself onto the sheets, and are conveyed through the printing stations of the printing machine. For transport without using grippers, the sheets are held in an area of their front and rear edges only by the adhesive, and are lifted off the circumferential surface of the impression cylinders with the aid of a sheet-lifting device in order for the front edge to be transferred to a downstream sheet-guiding cylinder. Lifting the sheets off the circumferential surface of the cylinders results in a peel-off effect, by which the adhesive bond can be readily released again.

Abstract: A method and machine for printing is disclosed as having a housing, a plurality of printing sections mounted in the housing configured to execute printing operation on the basis of given data, a control section configured to control so that the respective printing sections print on the print sheets on the basis of print data while identification marks are printed on the print sheets on the basis of identification mark data representing which printing section has been operated to execute printing, and a sheet discharge section on which the print sheets, printed at and outputted from the respective printing sections, are placed in a stack.

Abstract: The present invention provides an input roller system for displacing a printing plate toward and against a plurality of registration pins located on an external drum of an imaging system. The input roller system deskews the printing plate relative to the registration pins.

Abstract: A printing press performs offset color printing. A blanket cylinder having four image segments selectively contacts a plate cylinder having four image segments and an impression cylinder having five image segments for carrying print media. A pair of eccentric bushings for independently controlling the impression cylinder engages same to blanket cylinder. A print media feed system and a delivery system are located on the same side of the press and cooperate with each other via a means for moving feed and delivery trays in a generally vertical direction. Print media are gripped only once and travel in the same direction until let go by the impression cylinder. An image forming system forms four images on a plate cylinder to be inked by four respective inking units oriented therearound. All four plate image sections can be inked during one rotation of the plate cylinder. Four inking units including a minimal number of rollers for inking the plate image sections.

Abstract: A guiding device in a machine for processing sheets of printing material includes unthrottled air nozzles for contact-free guidance of the sheets, and throttled air nozzles arranged at locations which are prone to contact by the sheets; and a machine for processing sheets of printing material and a sheet-fed rotary printing machine, respectively, having the guiding device.

Abstract: A sheet transport cylinder in a machine that processes sheets of printing material includes air nozzles for sheet formats of the printing-material sheets. The printing-material sheets are dimensioned from a minimum format up to a maximum format. The sheet transport cylinder is distinguished by the fact that the air nozzles are throttled air nozzles disposed to be matched to the minimum format.

Abstract: A sheet-fed rotary printing press includes a feed unit, a printing unit, a delivery unit, and a printing quality control unit. The feed unit feeds sheet-like objects one by one. The printing unit performs printing on the sheet-like objects supplied from the feed unit. The delivery unit delivers the sheet-like objects printed by the printing unit. The printing quality control unit is provided on the delivery unit to adjust an amount of ink to be used for printing on the sheet-like objects.

Abstract: A paper discharging apparatus, which is provided in a printing machine, for transferring sheets of paper having different thickness. The paper discharging apparatus has a first gripper unit fixed in a groove, which extends along the cylindrical surface of a printing cylinder, and a second gripper unit, which moves along a discharging rail. The second gripper unit has a gripper and a base to hold the sheet. The position of the base is adjusted in accordance with the thickness of the sheet. A relatively thin sheet of paper is held by the first gripper unit and a relatively thick sheet of paper is held by the second gripper unit.

Abstract: A sheet-braking device for a sheet-processing machine includes a plurality of brake modules with a revolving suction belt formed with at least one suction opening. The brake modules have assigned thereto individual drives with controls for stipulating a reference speed relative to a speed of the machine.

Abstract: A multistage printing machine is disclosed with a vacuum conveyor between stages, and in which supplemental air is provided adjacent at least one printing cylinder.

Abstract: There is provided a double-sided printing press that includes a sheet-turning-over mechanism for turning sheets upside down at a sheet-turning-timing according to a set length of sheets, which has been previously set for the sheet-turning-over mechanism; and a sheet-length-detection means for detecting the length of sheets, which are fed to the sheet-turning-over mechanism; wherein where the length of sheets, which are fed to the sheet-turning-over mechanism and detected by the sheet-length-detection means, is deferent from the set length of sheets as a result of comparison therebetween, the sheets are stopped from being transferred to the sheet-turning-over mechanism.

Abstract: A print medium feed device and a stencil printing machine employing the same are disclosed wherein a print medium as a print sheet, transferred with a pair of secondary paper feed rollers, is transferred through a pair of transfer guide members to a press drum by which transfer of the print medium is succeeded. An upper transfer guide member, with which the print medium is brought into sliding contact, is periodically shifted between a guide position to allow the print medium to be guided to the press drum, and an inoperative non-guide position in which the upper transfer guide member is separated from the other transfer guide member. A shaft of one secondary paper feed roller is exerted with a rotational braking effect by a torque limiter, whose rotational braking effect is periodically released by a clutch unit.

Abstract: A cam mechanism for a folding cylinder or gripping cylinder of a printing machine have a cam disk assembly with two cam disks located adjacent to one another. The cam mechanism has good kinematic properties and is subject to low wear, the outer casing of the cam roller has two convex curvatures arranged adjacent to one another and running circumferentially around the cam roller, each curvature co-operating with one of the cam disks.

Abstract: A printer has a media transport with a rigid, air-transmissive platen. A movable air-transmissive flexible web overlays the platen. A suction device communicates with the platen to draw air through the web and through the platen such that a sheet of media carried on the web is biased toward the platen. A valve sheet overlays or underlies the platen, and includes a plurality of shut-off elements, each movable in response to temperature changes between a closed position in which the element contacts a portion of the platen to prevent air flow through that portion of the platen, and an open position, in which the element is spaced apart from the platen to admit air to the platen portion. The shut off elements may include resistive heaters and bimetallic strips, so that application of electricity generates heat to flex the strip to an open position.

Abstract: The printing press has at least one feed (31) for unprinted sheets (32), a plate cylinder (35) with at least one printing plate, a printing cylinder (36), a wiping device (49) and an inking system (37, 38, 39, 40, 41, 42, 43, 44, 45) for inking the necessary areas of a plate or plates carried by the plate cylinder (35). For a printing cylinder (36) that can carry N sheets on its periphery, N being a multiple of 2, the plate cylinder (35) comprises N/2 plates, so that half of the sheets (32) carried by the printing cylinder (36) are printed by each of the plates during a full rotation of the cylinders (35, 36).

Abstract: A printing device includes a print media advancement subsystem for providing accurate and timely print media advancement in the printing device. The print media advancement subsystem includes a vacuum chamber for generating a vacuum force through a platen for holding a print media stationary. In response to receiving a print media advance signal from a controller in the printing device, a sealing plate forming a side of the vacuum chamber is removed from the vacuum chamber. When the sealing plate is removed, the vacuum chamber is substantially open to the atmosphere, causing the vacuum chamber to pressurize. The pressurization of the vacuum chamber results in removal of the vacuum force from the print media, allowing the print media to advance along the top surface of the platen with minimal friction.

Abstract: A media advancing device for a hardcopy apparatus includes at least one roller having an outer surface and being rotatable for advancing media, and a negative pressure mechanism. The outer surface further comprises a plurality of openings and a contact region for engaging the media, wherein the negative pressure mechanism is capable of creating negative pressure through at least a portion of the openings in the contact region.

Abstract: The advance of a print media through a hardcopy apparatus is monitored by a separate wheel meeting in contact with the print media surface. An encoder disc is mounted coaxially with the wheel, and its rotary position is detected in non-contact making manner.

Abstract: A displacement device for a machine for processing flat printing materials includes a slide displaceable along a displacement path in and counter to a thrust direction, and being divided along the thrust direction into two slide parts. A drag joint forms a mutual connection between the slide parts. The drag joint has a joint axis extending perpendicularly to the displacement path. A machine for processing flat printing materials, such as a sheet-processing rotary printing press, is provided with the displacement device.

Abstract: In a folder, a folding cylinder having folding components accommodated on the periphery thereof and being phase-dependently operatable, and cylinder segments for carrying the folding components, the cylinder segments being adjustable in relation to one another and being mounted coaxially in side walls, includes separate drives, respectively, for driving each of the folding components, a rotary leadthrough via which energy is supplied to the separate drives, and a speed controller for speed-dependently controlling the separate drives; a method of operating the folding cylinder; a folder including the folding cylinder; and a rotary printing machine in combination with the folder including the folding cylinder.

Abstract: Multicolor prints are produced on a sheet in a printing machine. More than four colors can be applied to the sheet during its passage through the printing machine. Three printing units and an application unit are associated either directly with a printing cylinder of the printing machine or with a transfer drum which is associated with the printing cylinder. Seven colors, or six colors and a varnish coating can be applied to the sheet by the printing machine.

Abstract: A printing-material sheet processing machine includes at least one processing unit with an impression cylinder and a tool-carrying cylinder bringable into contact with the impression cylinder, the tool-carrying cylinder having at least one tool selected from the group of tools consisting of respective deforming and separating tools for the printing-material sheets, the processing unit also having a circumferential-register adjusting device and a lateral-register adjusting device, which are assigned to the tool-carrying cylinder for adjusting the register thereof, and having a diagonal-register adjusting device assigned to a sheet transport cylinder for adjusting the register thereof, the sheet transport cylinder being disposed for transferring the printing-material sheets to the impression cylinder.

Abstract: A device for catching a torn transport belt, includes a holding device for the transport belt. The holding device has two catching elements between which the transport belt runs, for holding the transport belt firmly therebetween. A first one of the two catching elements has a convex surface facing towards the transport belt, and the second one of the two catching elements has a concave surface facing towards the transport belt. Also included is a device for measuring tension of the transport belt, the tension measuring device being constructed for triggering the holding device when the tension of the transport belt falls below a prescribed value. A folder including the catching device is also provided.

Abstract: A stencil printer includes a printing drum which is rotated bearing a stencil wound around the printing drum, a pair of paper feed rollers which are rotated in contact with each other to supply a printing paper to the printing drum, and a press roller which is rotated in contact with the printing drum to convey the printing paper supplied to the printing drum with the printing paper pressed against the stencil on the printing drum. A paper feed roller driver drives the paper feed rollers, and a paper feed roller controller controls the paper feed roller driver to rotate the paper feed rollers at a peripheral speed higher than that of the printing drum at least from the time the leading end of the printing paper reaches the printing drum to the time the trailing end of the printing paper passes the paper feed rollers.

Abstract: A multiple color offset printer having a sheet feed mechanism in which a sheet feed cylinder receives a sheet in timed relation to a sheet transfer timing from the sheet feed cylinder to an impression cylinder. A blanket cylinder is divided into a plurality of uniform sized color sections around its periphery. The sheet feed cylinder has an outer peripheral length that is the same length as the peripheral length of each color section of the blanket cylinder. A sheet is transferred from the sheet feed cylinder to the impression cylinder once each time the sheet feed cylinder rotates a number of times equivalent to the number of color sections. A front lay cam rotates a single time during the same number of rotations as the number of the color sections. An abutment member moves from a projecting position in the sheet transport pathway to a retracted position separated therefrom a single time each time the front lay cam rotates a single time, so that a sheet is allowed to be supplied to the sheet feed cylinder.

Abstract: A device for forming a pile of sheets by means of a pile carrier and a stop. The stop can be swung around a horizontal geometric axis in a first direction away from the pile against a first actuating force of an actuating device and then swung back in the opposite direction by means of the actuating device while simultaneously raising the stop until reaching its alignment position on a second, higher level. So that the stop retains its alignment regardless of the level on which the stop is located, the device is provided with a guide which guide forces the vertical dislocation of the geometric axis, and with an end stop by means of which the stop is kept in the same alignment at any of the elevations assumed by the stop.

Abstract: A modular printing machine system for printing on sheets, including a first printing machine of satellite construction type having a central first impression cylinder and at least four printing devices assigned thereto and a sheet feeder, a second printing machine having a sheet feeder, and a coupling device for coupling the printing machines to one another for in-line operation thereof, includes a second impression cylinder in the second printing machine, the second impression cylinder and the first impression cylinder being of different sizes.

Abstract: A delivery for a machine for processing flat printing materials includes sheet brakes for accepting sheets fed in a processing direction at an acceptance level and for releasing the sheets at a surrender level. The sheet brakes are adjustably disposed for varying the acceptance level and the surrender level. A machine is provided for processing flat printing materials, having the delivery.

Abstract: A device for forming a pile of sheets by means of a pile carrier and a stop. The stop can be swung around a horizontal geometric axis in a first direction away from the pile against a first actuating force of an actuating device and then swung back in the opposite direction by means of the actuating device while simultaneously raising the stop until reaching its alignment position on a second, higher level. So that the stop retains its alignment regardless of the level on which the stop is located, the device is provided with a guide which guide forces the vertical dislocation of the geometric axis, and with an end stop by means of which the stop is kept in the same alignment at any of the elevations assumed by the stop.

Abstract: A paper pickup apparatus in a printer for pivotally moving by a motor includes a driving shaft rotated by the motor, a first pickup housing having at least one first transmission gear and first and second end portions, the first end portion mounted to the driving shaft, the first transmission gear transmitting torque from the driving shaft, a second pickup housing having at least one second transmission gear and being rotatably mounted to the second end portion of the first pickup housing, the second transmission gear transmitting torque from the first pickup housing, a connecting portion for connecting the first and second pickup housing with each other, the first pickup housing being rotatable to the second pickup housing centering thereon, and a pickup roller mounted to the second pickup housing and rotated by torque from the second transmission gear.

Abstract: An offset printing machine including an impression cylinder, a sheet feed cylinder and a blanket cylinder. An outer peripheral surface of the blanket cylinder is divided into a plurality of color sections in a circumferential direction thereof, and an outer peripheral surface of the sheet feed cylinder has a peripheral length equal to the circumferential length of each color section. A sheet held in the sheet feed cylinder is transferred to the impression cylinder each time the sheet feed cylinder rotates a predetermined number equal to the number of the color sections. One of impression cylinder grippers and a sheet feed cylinder gripper intermittently confront with each other upon rotation of these cylinders.

Abstract: A motor control method and apparatus for stopping an object moved by a motor accurately at a predefined target position, shortening the time period required in stop control, in which the motor is driven at a first (high) speed up to a distance from the target position adequate for stop control and then is sequentially braked to a predetermined speed lower than the first speed, driven at a second (low) speed up to a distance from the target position equal to the stopping distance, and braked to a stop. The method and apparatus are used in a time recorder.

Abstract: A sheet-guiding device has a sheet-guiding element for a sheet-fed printing machine having an impression cylinder and a further cylinder adjacent thereto, the sheet-guiding element being disposed for guiding a sheet transported by the impression cylinder when the further cylinder is set-off from the impression cylinder. The further cylinder includes a cylinder selected from the group thereof consisting of an applicator cylinder for applying ink or varnish, respectively, to a sheet lying on the impression cylinder, and a tool cylinder for applying a finishing step to a sheet lying on the impression cylinder. The sheet-guiding element is disposed separately from the further cylinder and covers an impression zone of the impression cylinder.

Abstract: A gripping device for conveying sheets in silk-screen printing machines. The gripping device comprises a box-like gripping bar having an outwardly and upwardly slanted rear wall provided with a longitudinally extending stepped edge at the upper side for resting a sheet; a plurality of tiltable plate-like gripping elements, forming a flat jaw, are disposed side by side and hinged to the side edge of the gripping bar which is opposite to the slanted wall. A corresponding number of lifting arms for tilting the gripping plates are secured to a drive shaft which extends into a tubular portion of the box-like gripping bar; the gripping bar is provided at both ends carriages and control levers to cause rotation of the lifting arms and tilting of the gripping plates, against the action of biasing springs during running on the printing machine. This solution provides a wide gripping surface for the sheets, reduces specific pressures, and a gripper with a simplified design.

Abstract: A sheet-fed press includes a first press cylinder and a second press cylinder. A first air supply chamber and a first air vent is located in the upstream segment of the flow of a sheet. A second air supply chamber and second air vent is located in the downstream segment of the flow of the sheet. Air from the second air supply chamber is blown through the second air vent in the direction that the second cylinder is rotating.

Abstract: A paper guide apparatus of a perfecting press is disclosed. The perfecting press comprises a blanketed impression cylinder which has a holding device for holding paper and prints one side of the paper, and a blanket cylinder which is in contact with the blanketed impression cylinder and prints the other side of the paper. The blanketed impression cylinder and the blanket cylinder are arranged nearly horizontally. In the paper guide apparatus, suction chambers for sucking and guiding the paper transported by the blanketed impression cylinder are provided between a transfer cylinder located directly ahead of the blanketed impression cylinder and the blanket cylinder, and an air nozzle is provided for blowing air between the paper transferred from the transfer cylinder to the blanketed impression cylinder and the circumferential surface of the blanketed impression cylinder.

Abstract: A printing unit for a machine for processing flat printing materials includes a feeding cylinder for loading the printing unit with the printing materials in a processing direction, and a device for removing particles adhering to the surface of the printing materials, the particle-removing device further including a blowing device for separating the particles from the printing materials without contact, and a suction device for discharging the separated particles, both the blowing device and the suction device being formed by blowing and suction chambers arranged within the feeding cylinder and having a fluidic connection to surroundings of a jacket surface of the feeding cylinder; a machine including the printing unit; and a feeding drum or cylinder of the printing unit.

Abstract: A digital printer or copier machine (1) is proposed for the single-sided or double-sided printing of a substrate (11), with at least one fixing device (3) for fixing toner onto the substrate (11), whereby the fixing device (3) has at least one heating device for fusing the toner. The machine has, in addition, at least one transport device (17), in order to supply the substrate (11) to the heating device, to guide it past the heating device and/or to further transport it from the heating device, whereby the transport device (17) has at least one suction belt (19) that is provided with a number of through-passage openings (21) and can be impinged with a vacuum. The machine (1) is characterized in that the suction belt (19) is constructed as a mesh.

Abstract: This invention concerns a sheet guide unit which allows sheets of thinner sheets to be conveyed in a stable fashion when the sheet is conveyed in a sheet guide space between the printing cylinder and a sheet guide surface. The sheet guide unit has 1) a first air control means to control the supply air, which is blown from the air supply chamber through air vents provided in the upstream portion of the path, and conveys the sheet through the sheet guide space suspending over the downstream portion of the path; and 2) a second air control means to control the aspiration air, which is drawn into the aspiration chamber via a plurality of first aspiration vents in the downstream portion of the path, and exhausted from an aspiration port provided on one of the walls of the aspiration chamber.

Abstract: A drive device for producing an at least approximately sinusoidal speed pattern for a transport belt provided in a printing machine for transporting printing material selected from the group thereof consisting of sheets and signatures, includes non-round drive wheels rotatable about respective axes thereof, and a tensioning member by which the drive wheels are drivingly connected.

Abstract: A method and machine for printing is disclosed as having a housing, a plurality of printing sections mounted in the housing configured to execute printing operation on the basis of given data, a control section configured to control so that the respective printing sections print on the print sheets on the basis of print data while identification marks are printed on the print sheets on the basis of identification mark data representing which printing section has been operated to execute printing, and a sheet discharge section on which the print sheets, printed at and outputted from the respective printing sections, are placed in a stack.

Abstract: A device for guiding sheet-like copies which are severed from a material web in a cutting nip of a cutting-cylinder pair, including a copy guide disposed in an outlet wedge of the cutting-cylinder pair for gripping leading ends of the sheet-like copies for guiding the copies, the copy guide including revolving transport elements, and actuating drives for displacing the revolving transport elements in a lateral direction so as to adapt the transport elements to different positions and widths of material webs.