Abstract: By executing low-speed conveyance of web by a web feeding mechanism before the printing operation begins, slack W22a, W10a, and W15a in the web located downstream of the guide rollers, and the slacked web is accumulated in the air loop portion, thereby completing the standby for printing. At that time, the amount of web conveyance (accumulation) is saved. Then, high-speed printing operation begins, and when the amount of printing has reached the amount of web conveyance saved, high-speed conveyance by the web feeding mechanism begins.

Abstract: There is described a sheet inspection system for a sheet-fed recto-verso printing press of the type comprising two printing cylinders (10, 20) for carrying out simultaneous recto-verso printing of the sheets, said sheet inspection system comprising at least one inspection device (200; 300; 400) for taking an image of one side of the printed sheets. The sheet inspection system comprises first and second transfer cylinders (60, 65) interposed between a first (10) of the two printing cylinders (10, 20) and a chain gripper system (5) of the printing press, printed sheets being transferred successively from the first printing cylinder (10) to the first transfer cylinder (60), to the second transfer cylinder (65), and to the chain gripper system (5).

Abstract: Apparatus designed to cancel at least one postage or franking mark on a surface of a mailpiece moving on edge in a belt conveyor, said apparatus comprising: a conveyor portion with a plurality of small superposed belts and a plurality of superposed print heads; and control means for controlling the print heads in such a manner as to cause a print head to print one or more cancellation marks over the franking mark(s) detected on the mailpiece. Each print head is suitable for operating selectively with a plurality of superposed inkjets so as to print only a portion (¾, ½, ¼) of said cancellation mark or a scaled-down version thereof over the franking mark when said franking mark is positioned in such a manner as to be off-center between two belts.

Abstract: A sheet-fed offset printing press for printing multiple colors on both sides of sheets, preferably on sheets of paper, includes a first row of in-line printing units for printing a first side of the sheet, followed by a reversing device, followed by a second row of in-line printing units for printing the other side of the sheets, and followed by one or more varnishing units that are disposed in such a way, or include varnishing blanket cylinders that are disposed in such a way, that the front sides and the back sides of the passing sheets are varnished. A further reversing device is inserted between two varnishing units. A method of printing multiple colors on both sides of sheets is also provided.

Abstract: An electrical voltage supply device for machines processing printing material includes at least one drive motor for the transport of printing material and at least one further electrical consumer. A control unit is provided which, when the supply voltage drops below a minimum acceptable supply voltage of the machine processing printing material, switches of electrical consumers which are not required for the transport of printing material and supplies the drive motor for the transport of printing material from energy stored in the moving masses of the machine processing printing material.

Abstract: A printing press is provided. The printing press includes a print unit printing a plurality of printed products, the plurality of printed products being formed into a stream downstream of the print unit. The printing press also includes at least one base and a press component, the press component is mounted onto the at least one base for placement in the stream and translational movement transverse to the stream. The press component may be a pitch changing apparatus. A method is also provided.

Abstract: A printing press is provided. The printed press includes a plurality of printing units printing on a web and a folder for processing the web. The folder includes a cutter for cutting the web into printed products and a nip section for reorienting the printed products. The nip section includes a first pair of nip rolls, a second pair of nip rolls and at least one motor driving the first pair of nip rolls and the second pair of nip rolls, the at least one motor driving the first pair of nip rolls at different velocities than the second pair of nip rolls to reorient the printed products. A method for reorienting printed products in printing press is also provided.

Abstract: The present invention aims at an improved apparatus for introducing sheet smoothly into printing unit 10 even in case thickness of sheet is changed without any adjustment. The present invention premises a sheet-fed printing press whose sheet transfer path for a plurality of printing units 10 in modular fashion is composed of double-sized transfer and impression cylinders.

Abstract: A printing press is provided including at least one print unit printing a first job on a web, a folder splitting the web into a plurality of ribbons, combining the ribbons, and cutting the ribbons into signatures, the folder having a folder delivery for delivery of the signatures, a marking device marking every ribbon, a sensor sensing the marks on every ribbon, and a controller connected to the marking device and the sensor and determining a shortest ribbon value and a longest ribbon value, the shortest ribbon value being a function of a shortest path length of a first ribbon through the folder and the longest ribbon value being a function of a longest path length of a further ribbon through the folder. A method is also provided.

Abstract: A sheet delivery apparatus includes sprockets and delivery grippers, a sheet delivery device, a switching cam, and conveyor belt, driving roller, and driven roller. The sprockets and delivery grippers hold and convey a sheet. The sheet delivery device delivers the sheet conveyed by the sprockets and delivery grippers. The switching cam is arranged upstream of the sheet delivery device in a sheet convey direction to release the sheet held by the sprockets and delivery grippers. The conveyor belt, driving roller, and driven roller are arranged below the switching cam to convey the sheet released by the switching cam in the sheet convey direction.

Abstract: A method and an apparatus for turning a sheet during its transport through a printing press permit improved printing results as a result of improved sheet guidance. A sheet is tautened following a transfer from a first transport device to a second transport device.

Abstract: The machine comprises at least a printing cylinder (4), an inking cylinder (5) and a chain gripper transporting system (2,3) with grippers (17). The printing cylinder (4) comprises at least one transversal pit (7) for receiving said chain gripper system (3) such that the inking cylinder (5) inks the planar object (1) while said object (1) is held by said chain gripper system (3).

Abstract: A drum for conveying a sheet has a cohesive sheet-guiding surface provided at little effort or cost and includes a drum body, a jacket forming a circumferential surface and a device for fixing the jacket onto the drum body. The jacket is located above a gap formed in the drum body so as to extend parallel to a longitudinal axis. The device for fixing the jacket includes at least one tensioning body that acts on the jacket in the region of the gap and is adjustable in radial direction.

Abstract: A sheet guide apparatus includes a transfer cylinder, first vane members, and a lateral air blowing guide. The transfer cylinder conveys a sheet. The first vane members are arranged at at least one end of the transfer cylinder and rotate together with the transfer cylinder to discharge air in a radial direction. The lateral air blowing guide is arranged close to the transfer cylinder and discharges air from the first vane members toward the sheet which is conveyed as the transfer cylinder rotates.

Abstract: A sheet-processing machine, in particular a rotary press, has a first gripper system for transporting sheets onto a sheet stack and a second gripper system following the former for accepting selected sheets from the first gripper system. The second gripper system is oriented substantially vertically and it has a drive that can be actuated separately and independently from the first gripper system.

Abstract: A device for transferring print products comprises a circulating conveying element that includes clamps. A conveyor moves approximately in the same direction and synchronously below the conveying element, which includes grippers. A guide arrangement is provided in a transfer segment where the print products are transferred from the circulating conveying element to the conveyor. The guide arrangement includes spiral rotors having spiral sections respectively extending from opposite sides into spaces between the print products and which are effective in the conveying direction to stably position the print products. Activation devices operatively are arranged to open the clamps and close the grippers to effect the transfer of the print products from one of the clamps on the circulating conveying element to one of the grippers on the conveyor.

Abstract: A printing press is provided. The printing press includes a print unit printing a stream of printed products, the printed products having a first pitch. The printing press also includes a pitch changing device. The pitch changing device includes an upper roller mounted on an upper axle, a lower roller mounted on a lower axle, the upper and lower rollers forming a roller nip, and a motor driving the upper and lower rollers in opposite directions. The nip receives the stream of printed products. The motor varies the velocity of the nip and the printed products using an electronic cam velocity profile so as to alter the first pitch. A method is also provided.

Abstract: A sheet brake for braking sheets made from a printing material contains circulating brake elements and at least one sheet support that is disposed between the brake elements and forms a blowing device. The sheet support contains a first nozzle array having air nozzles and a second nozzle array having air nozzles. The air nozzles of the first nozzle array are configured to produce blown air volumetric flows, which are smaller than blown air volumetric flows from the air nozzles of the second nozzle array.

Abstract: A sheet guide apparatus includes a transfer cylinder, delivery chains, and sheet guide structure. The transfer cylinder holds a sheet. The delivery chains hold the sheet received from the transfer cylinder and conveys the sheet along a first convey path which is at least substantially arcuate. The sheet guide structure guides the sheet conveyed by the delivery chains. The sheet guide structure includes a movable guide member and stationary guide member. The movable guide member is movable between positions close to and spaced apart from the first convey path. The stationary guide member is stationarily arranged at a position spaced apart from the first convey path. When the movable guide member is close to the first convey path, a thin-sheet guide surface having a continuous substantially arcuate section is formed by only the movable guide member.

Abstract: A mailing machine for processing mailpiece envelopes, wherein a print station thereof is reconfigurable to process envelopes in two operating modes. The reconfigurable print station includes a displacement device having an integrated cutting mechanism to perform both printing and cutting operations. The displacement device includes a displacement surface for urging the mailpiece envelopes against a registration surface to facilitate print operations and a cutting mechanism coupled to the displacement device for cutting the sheet material in a direction substantially parallel to the processing path of the mailpiece envelope. The cutting device is adapted to be repositioned relative to the displacement surface such that, (i) in a first operating mode, the cutting device is retracted beneath or below the plane of the displacement surface, and (ii) in a second operating mode, the cutting device is extended above the plane of the displacement surface to cut the sheet material as it traverses the processing path.

Abstract: A digital printer is provided with an automated printing sheet transport system, operating in an intermittent regime of feeding a printing sheet to the digital printer, halting the transport to allow printing onto the printing sheet while the printing sheet is maintained in a fixed position, and removing the printed sheet from the digital printer after printing. The digital printer may be combined with a screen print station, both operating on top of a single printing sheet transport system, to form an integrated multifunctional and hybrid printing press.

Abstract: An apparatus for conveying sheets through a printing machine allows continuous monitoring of the position of a sheet with regard to a guide element over a long time period. There is provided a circulating conveyor element with grippers in which the sheet is held at a leading edge. A device for setting the position of the sheet can adjust the position with regard to a desired position. A measuring configuration measures the position and the presence of the sheet. A control device is connected to the device for setting the position and to the measuring configuration. The measuring configuration is mounted so as to circulate with the conveyor element.

Abstract: A method for processing lenticular foil in sheet-fed printing presses is provided, the lenticular foil having lens strips adjacently disposed and extending transversely to the running direction of the sheets. The method ensures that the lens strips proceed parallel to the sheet's front edge For determining the actual position of a sheet aligned according to a front edge, the position of a contact line between two adjacent lens strips is determined, and compared with a nominal position. If the actual position deviates from the nominal position, an adjusting value is generated for realizing a leading or trailing movement of plate cylinders making possible the nominal position, of a gripper sheet-holding system of a sheet-accelerating device mounted in a drum.

Abstract: An apparatus for carrying or guiding a printing material sheet on an air cushion between a nozzle surface and the printing material sheet. The apparatus has first nozzle pairs which are arranged in a first row and second nozzle pairs which are arranged in a second row for generating the air cushion. The first nozzle pairs and the second nozzle pairs in each case have a blower nozzle and a suction nozzle, which are paired in such a way that one and the same air flow is blown out by the respective blower nozzle and is aspirated, at least predominantly, by the suction nozzle that is paired with the blower nozzle. The suction nozzles of the first nozzle pairs are arranged in such a way between the blower nozzles of the second nozzle pairs and the suction nozzles of the second nozzle pairs such that the air flows of the second nozzle pairs flow past the suction nozzles of the first nozzle pairs.

Abstract: Apparatus for introducing sheet is disclosed which mainly aims at feeding sheet smoothly into sheet-fed printing press even in case of thick sheet with higher resilient force. The present invention premises sheet-fed printing press with a plurality of printing units whose sheet transfer path is composed of double-sized transfer and impression cylinders 20, 18. Sheet introducing apparatus comprises: first transfer cylinder 30 of approximately the same construction with said double-sized transfer cylinder 20 and is disposed between sheet feeder 26 and first printing unit 10a, the center of rotation 34 being above feeding path for sheet 22, and second transfer cylinder 32 of also approximately the same construction with said double-sized impression cylinder 18 and is in contact with the lower portion of said first transfer cylinder 30 and said transfer cylinder 20 of said first printing unit 10a.

Abstract: A rotary printing press, which has a printing tower with a first printing unit, which is arranged on a support base, and a second printing unit, which is arranged above the first printing unit, and a substructure arrangement, is disclosed. The substructure arrangement supports the second printing unit so that the weight of the second printing unit bears on the substructure arrangement.

Abstract: A surface, especially a galvanically molded transport cylinder sleeve, has a surface structure for contacting printing material, in particular sheets of paper. The surface structure includes first structural elevations spaced apart from each other by a minimum distance A1 and having a height B1 and second structural elevations spaced apart from each other by a minimum distance A2 and having a height B2 with B2<B1. A ratio between the distances A1 and A2 ranges between 10:1 and 1:1. The surface has support areas for supporting the printing material. The printing material is prevented from contacting a planar horizontal surface between the support areas of first, higher structural elevations due to second, lower structural elevations with support areas thereof that are formed between the first, higher structural elevations. A machine for processing printing material and a method for producing areas with a surface structure, are also provided.

Abstract: Sheets are conveyed through a printing machine with improved reliability of the suction grippers. The apparatus for conveying a sheet through a printing machine has a cylinder with grippers in a channel for holding the sheet at its leading edge, circulating grippers for holding and for transferring the sheet from the cylinder at its leading edge, and circulating, radially positionable suction grippers for holding the sheet at its trailing edge. An actuating apparatus opens and closes the grippers and controls vacuum for the suction grippers. A drive for the cylinder and circulating grippers and suction grippers. A control device switches on and off the sheet feed to the cylinder. The suction grippers can be moved in the radial direction into a rest position when the sheet feed is switched off.

Abstract: A delivery drum includes at least one supporting shell for supporting a printed sheet and for producing a vacuum region between the supporting shell and the printed sheet. The supporting shell extends over the entire width of the printed sheet. A circumferential length, which is at least one quarter of the sheet length of the printed sheet, is disposed between the sheet start of the printed sheet and the start of the vacuum region.

Abstract: A machine for processing a sheet of printing material contains a first chain conveyor having a first gripper bar for holding a leading edge of the sheet, and a second chain conveyor having a rear gripper bar for simultaneously holding a trailing end of the sheet. A processing device is assigned to the chain conveyors for processing the sheet. A distance changing device is provided for temporarily reducing a gripper distance between the two gripper bars and, consequently, producing a sheet sag required for the processing of the sheet carried out by the processing device. The distance changing device defines a first circulation path of the front gripper bar, determined by the first chain conveyor, and a second circulation path of the rear gripper bar, determined by the second chain conveyor, running locally differently from each other. The processing device can be, for example, a sheet smoother.

Abstract: A sheet processing device includes a transport cylinder, processing cylinder, and blowing device. The transport cylinder holds and conveys a sheet. The processing cylinder opposes the transport cylinder, and processes the sheet conveyed by the transport cylinder. The blowing device blows air to the sheet conveyed by the transport cylinder on an upstream side in a sheet convey direction of a contact position where the sheet conveyed by the transport cylinder comes in contact with the processing cylinder.

Abstract: There are provided a thickness detecting apparatus which can restrain erroneous detection even though a sheet or the like overlaps with only a part of a rotary body, and, which can enhance the degree of accuracy of detection, comprising a cylindrical displaceable rotary body and a cylindrical stationary rotary body which are opposed to each other, the thickness detecting apparatus detecting a thickness of the sheet or the like to be transferred in accordance with a displacement by which the displaceable rotary body is separated from the stationary rotary body, when the sheet or the like passes through between the displaceable rotary body and the stationary rotary body, and the center of a load with which the displaceable rotary body presses the sheet or the like is biased from the center of the displaceable rotary body in one of center axial direction.

Abstract: In a delivery apparatus having a delivery conveyor for receiving and transporting a signature discharged from a printing press, the delivery conveyor is continuously driven if the drive speed of the printing press is higher than a predetermined speed, or the delivery conveyor is intermittently driven if the drive speed of the printing press is lower than the predetermined speed.

Abstract: A plurality of helical groove sections are provided on outer peripheral surfaces of press rollers provided in a curl elimination mechanism. Each of the groove sections assumes a shape extending in the circumferential direction of the respective press rollers; that is, a direction oblique to a transport direction of paper. Hence, when compared with a case where the groove sections are aligned in the transport direction of the paper, the paper is less susceptible to traces of the groove sections. Since the groove sections are provided on the press rollers, an attempt can be made to enhance dimensional accuracy of or reduce the weight of the press rollers.

Abstract: A printing press for processing sheet printing materials includes at least one printing unit, a computer and a measuring device for monitoring printing quality during a printing process. The measuring device has a sensing device for measuring by color or spectrally to register the printing material. At least one sheet-guiding element leads the sheet printing material past the sensing device. A measuring device for monitoring printing quality during a printing process in a printing press for processing sheet printing materials, is also provided.

Abstract: Sheets are conveyed through a rotary press with linear travel grippers. The novel conveying apparatus prevents collisions between the grippers and printing unit cylinders. The grippers are fixed to circulating links to convey a sheet through a nip between two cylinders that interact during printing. The links and the cylinders are coupled to drives that can be activated separately. In each case a collision disk is mounted on a shaft journal of at least one cylinder. A slip clutch is provided between the collision disk and the cylinder. A braking element is coupled to the grippers which, in the event of non-synchronous running with the cylinder, runs onto the collision disk and prevents the collision disk from moving.

Abstract: A transport device for transporting printed products is provided including a first and a second tape for receiving and transporting the printed products, a first and second roller for guiding the tapes, a nip-adjusting device adjusting a nip formed by the first and second tapes at the first and second rollers and a sensor determining a thickness of the printed products, the nip adjusting device being actuated as a function of the sensor. A method is also provided.

Abstract: In an exchangeable cylinder type rotary press driven by a prime mover, it is made possible to make a print of any top-bottom length as desired, independently of a gear train that transmits power from the prime mover to an exchange cylinder unit.

Abstract: A method of varying a drum profile of a vario drum for transporting printing material sheets, in which shell segments of the vario drum are pivoted inward and outward. Sheet supporting elements assigned to the shell segments are reversibly deformed by pivoting the shell segments. A vario drum suitable for implementing the method and a machine containing the vario drum for processing printing material sheets contain the shell segments and the associated sheet supporting elements.

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: Provided is a bulk paper feeding device with an intermediate conveyor comprising a carrier capable of carrying a large quantity of paper, a paper feeding mechanism for picking up and feeding one sheet at a time of the paper from the carrier, and an intermediate conveyor for transporting a sheet of paper fed from the feeding mechanism to the main paper feeding table of the paper feeder on the body of the image forming device or to the vicinity of a paper feeding port that faces the main paper feeding means of the paper feeder.

Abstract: In order to process inexpensive printing materials in connection with the processing of an extremely wide range of coating media, such as solvent-containing printing inks, and, moreover, in connection with variable format configuration and extremely flexible processing processes, provision is made to couple a web-fed rotary press and a sheet-fed rotary press to each other. For this purpose, a transfer assembly 7 in the form of a roll-sheet feeder is arranged between the presses.

Abstract: A printer of the present invention includes a timing belt passed over drive pulleys, each of which is mounted on a particular print drum, via phase adjusting means and deflection pulleys or rotary members. The deflection pulleys are rotatable in contact with the rear surface of the timing belt. The timing belt has its rear surface ground to have uniform thickness. The printer is free from the deviation of relative phase between the rotary members and offset ghosts ascribable to the irregular thickness of the timing belt, while preserving the low-cost configuration of timing belt connection.

Abstract: The invention concerns an installation comprising means controlling printing quality supplied by a printed sheet feeding device. Downstream, printing means print serial numbers and/or affix other elements. The quality of the number printing is controlled by a control device. A transfer device transports the sheets to a stock of three stacks one of which collects the defective sheets. A marking device affix a mark on the sheets considered unsuitable during the quality control.

Abstract: The invention relates to a delivery device for a sheet-processing machine. The object of the invention is providing a delivery device on a sheet-fed rotary printing machine, that can be universally used and permits quality control of the printed and/or laminated sheets. to this end the delivery device includes rotating sheet feeding system 5 supplying the printed sheets to a first delivery stack 9 and with a drum 7 acting as a turnout point in front of this delivery stack 9 in the transport direction 2 for selective sheet removal. The drum 7 is allocated to the sheet feeding system 5. A vacuum table 14 coupled with a pneumatic system and with at least one rotating suction belt for suctioning, transporting, and positioning a sheet is arranged downstream from the drum in its rotational direction. At least one quality control device 12 for inspecting the sheet is arranged at a distance to the vacuum table 14, with the second delivery system 8 being arranged downstream from the vacuum table 14.

Abstract: A press operation and management information system for offset sheet fed printing industry for accurately counting total and “good” printed paper that has gone through a printing press. The press operation and management information system for offset sheet fed printing industryincludes a system control including a control card, wherein the control card supplies data to a press. A feeder clutch is connected to the system control, wherein the feeder clutch turns on and off the press and the system control. A counting system is controlled by the system control and includes a tape inserter and a plurality of sensors. The data in the system control may be updated and reviewed by a system operation including a monitor and a printer, wherein the monitor displays a completion of pile function to print a moving tag from the printer and wherein the monitor also displays a new work function which accepts a print job not originally listed on a list of work.

Abstract: A method for driving a satellite offset press, and a satellite offset press which, with little expenditure, permits multicolor printing in one pass. A satellite offset press, in which form cylinders and associated transfer cylinders are driven synchronously, while in each case segments located in the circumferential direction of the form cylinders and of the transfer cylinders and also of the transfer cylinders and of an impression cylinder interacting with the latter roll on one another in accurate register with a sheet held thereon, following each full revolution. The speed of the impression cylinder is reduced and increased again, so that the transfer cylinders lead by at least one segment length in the circumferential direction.

Abstract: A device for conveying a sheet through a printing machine includes a cylinder, formed with a channel wherein grippers are disposed for holding the sheet at a leading edge, a chain conveyor with grippers fixed to endless chains for holding and picking up the sheet at its leading edge from the cylinder and for holding the sheet at its trailing edge, and rotating sprockets carrying the chains. An actuating device is provided for opening and closing the grippers, and a drive is provided for the cylinder and the sprockets. Gripper pads and gripper tips for the trailing-edge grippers, in opened condition of the grippers, are able to run past the cylinder. The gripper pads and tips lie underneath a path described by the sheet. The trailing-edge grippers are closable in a rotational angle region wherein the chains run off the sprockets for the cylinder.

Abstract: A sheet delivery mechanism for a sheet-fed printing machine which is adapted to reduce changes in the position of sheet material in a stack during a stack changeover operation and which facilitates the formation of a stack with properly aligned edges. The sheet-delivery mechanism includes at least one length adjustable edge guide 16 supported between a stack support plate 14 and a cross element 15 which can be detachably connected to the frame of the sheet delivery mechanism.

Abstract: An air folder adjuster (10) includes an air supply (12) and air supply tubing (14) connected to air supply (12) at end (16). The opposite end (18) of air supply tubing (14) is connected to one or more air nozzles (20). In a printing press utilized for folding documents such as books, air folder adjuster (10) is positioned so that air nozzles (20) direct compressed air from air supply (12) downward onto the head (26) of document (24) on either side of chopper arm (34) during the folding process thus ensuring that the document (24) lies flat, square, and untouched during the folding process and thereby allowing the elimination of chopper brushes altogether.