Abstract: A printing unit of a web-fed rotary printing press for newspaper printing includes forme cylinder which is six upright broadsheet pages in width and a transfer cylinder which is six upright broadsheet pages in width and has three clamping channels for clamping three rubber blankets, wherein each blanket is two pages in width, wherein the clamping channels are offset from each other by approximately 120°.

Abstract: A monitoring device is provided for a printer, especially a sheet-fed offset printer. The printer has a controller that records the signals of signal transmitters in the individual units of the printer, through which command signals for actuators/drives connected to the control can be generated as a function of the signal state, and a monitoring computer that additionally records the signal states of the signal transmitters and causes the switching off of actuators/drives. In the monitoring device, the signal states of the signal transmitters (G) of the printer units are fed to several slave computers (S), which are connected to each other via a monitoring bus (UB) and to a monitoring master (UM) connected upstream from the monitoring computer (UR). The actuators/drives (A) are connected to respective ones of the slaves (S) and can be switched off by the slaves in response to a command sent by the monitoring master (UM) via the monitoring bus (UB).

Abstract: An air assisted sheet guide device in a printing machine which is operable during either positive pressure (blast) air operation as well as suction air operation to permit reliable and stable sheet guidance with reduced air flow turbulence. The sheet guide device includes at least one module that defines a guide surface having air flow openings therein and an air flow channel, and a pneumatic system for creating either a positive or suction pressure generated air flow in the flow channel. One or more plate-like air directional elements are mounted within the air flow channel which create a uniform pressure distribution on the guide surface during positive (blast) air operation and which more uniformly direct air to the pneumatic system during suction pressure operation.

Abstract: The cylinder includes first and second cylinder parts which are designed to be rotatable in relation to one another in the circumferential direction and are fitted with respective first and second operating elements for acting on a foldable product. The first cylinder part is mounted non-rotatably on a shaft and of the second cylinder part is mounted on the shaft rotatably in the circumferential direction. The shaft is mounted at one end, fixed axially, in a side wall in a bearing designed as a fixed bearing. The second cylinder part is mounted separately, with a spacing (A) from the first cylinder part, in a second fixed bearing which is independent of the first bearing.

Abstract: In order to manufacture a cylinder of a rotary printing machine cost-effectively, its cylinder body is assembled from a cylinder casing and a first and second side part located at the ends of the cylinder casing, one and the same first and second side part being capable of being completed in order to produce different cylinders with cylinder casings of different outside diameters.

Abstract: A coating machine for applying a flowable coating substance to a sheet material to improve its surface. The coating machine has a series construction which lends itself to easy modification and versatile use. The coating machine includes, in a sheet conveyance direction, a first coating unit for applying a flowable substance to a front side of the sheet material, a sheet turning unit for reversing the position of the sheet, a first coating unit for applying a flowable substance to a reverse side of the sheet material, and sheet delivery unit. The coating units may have similar or identical constructions with interchangeable dosing systems.

Abstract: Apparatus includes a housing, a feed table outside the housing for receiving a plate-like blank, a round shaping device in the housing for shaping the blank into a sleeve-like printing form, a welding system, and a transport device for fixing, transporting and depositing the blank aligned level on the shaping device. The transport device includes a plate suction frame penetrated by suction elements which make contact with the blank placed on the feed table. After contact has been made, the blank is fixed by activating the suction elements on the plate suction frame so as to be aligned level, and transported in a stable position to the round shaping device. The raw form is deposited on the round shaping device so as to be aligned level and fixed in-register.

Abstract: In order to create preconditions, in a web-fed rotary press, for good format variability of the printed products and economic utilization of the printing material, at least two printed pages of different heights are arranged in the circumferential direction on a forme cylinder.

Abstract: In order to provide good format variability of printed products and economic utilization of the printing material, a web is supplied to a cross-cutting device and cut up into sheets with different cut lengths corresponding to heights of printed pages in a sequence.

Abstract: A printing machine having an inking unit which prevents overinking of the printing cylinder upon increases in printing speed, such as during start-up of a printing operation. The inking unit includes an ink supply, two roll trains each comprising a plurality of inking rolls for communicating ink from the ink supply to a plurality of ink applicator rolls associated with the printing cylinder, with at least one inking roll in each roll train being displaceable in phase with an increase in printing speed for interrupting the respective roll train and preventing excessive ink application to the printing cylinder.

Abstract: A process for treating a used or unused printing plate with an erasing composition to clean the printing plate, laser imaging the printing plate with a polymeric substance, and to provide art image thereon, and fixing the image on the printing plate. Further, the printing plate has applied thereto any one of a heat-curable and water-soluble substance, if desired, immediately after the laser imaging, or a water-soluble substance immediately after the laser imaging, followed by warming of the printing plate. The water-soluble substance or the heat-curable and water-soluble substance is washed off using a solution essentially consisting of water before printing.

Abstract: A method of varying the ink density of the full tone in printing within a rotary printing machine with an ink application system which can provide a constant quantity of ink which, in spite of constant ink supply from the inking unit, permits control of the full-tone density or adaptation of the raster tonal values in the print. The method includes setting the binary image on a printing plate. A basic raster of raster points, which determines the area coverage of the binary image, is produced on the printing plate for the variable-area image information. The basic raster is then superimposed on a fine microraster in such way that the area coverage of the basic raster is reduced by a percentage which can be set between 0% and 100%.

Abstract: Temperature control of the coating medium is performed to influence the processability of coating media in an applicator system. In order to operate without losing efficiency, devices acting directly from the inside or the outside for heat supply or dissipation are connected to the elements guiding the coating medium. The temperature of the coating medium is influenced by measuring the temperature within the coating medium and, if necessary, at the elements guiding the coating medium.

Abstract: In an erasing and cleaning device for cylindrical surfaces, in particular of printing-form and rubber-blanket cylinders of a printing machine, with the aid of a cleaning cloth capable of being moved by cleaning-cloth transport means, the cleaning-cloth transport means comprising a fresh-cloth roll, a pressure element, which presses the cleaning cloth against the cylindrical surface, and a dirty-cloth roll for receiving the spent cleaning cloth and cooperating with a positioning unit for the operating position and a drive, to make it easier to change the cleaning cloth and to achieve a reduction in the time taken by this change and, moreover, to make this erasing and cleaning device capable of being used universally, there is provision for the cleaning-cloth transport means together with the cleaning cloth, to be packaged in an independent cassette and to be exchangeable in this form and for the positioning unit, in the form of a running mechanism with a drive for the cassette, to be arranged permanently as a

Abstract: The invention relates to the drive of a printing machine. Cylinders and functional groups are to be driven with low technical expenditure. To this end, all form cylinders (1.1, 1.2) in a printing unit, for example, are driven respectively by separate electric motors (7) and are not in mechanical drive connection.

Abstract: In folded-product production in which a product stream is split up into at least two sub-streams which each run through an associated folding arrangement and are then reunited, it is possible to achieve a high level of user-friendliness and good cost-effectiveness in that at least one sub-stream is assigned a marking arrangement for marking the products passing it, with the result that, upon detection of inaccuracies stemming from the folding operation carried out following the splitting-up action, said products can immediately be assigned to the associated sub-stream, and thus to the folding arrangement belonging to said sub-stream.

Abstract: In order to provide a rotary printing machine for direct printing, in which the printing-assembly cylinders are guided in a stable manner by means of a cost-effective device, the forme cylinder and the impression cylinder of a printing assembly are mounted, adjustably in terms of their mutual spacing, in side walls. At least one of the two cylinders is mounted on both sides in slides movable on straight guide elements which are arranged in each case on at least one of two opposite panels of an aperture in the side walls.

Abstract: In combination with a transport mechanism that includes a plurality of conveyor rollers, an apparatus is used to position a carriage loadable with a wound reel at a desired location on the transport mechanism. The apparatus includes a rotary pulse generator associated with one of the plural conveyor rollers for registering the revolutions of the one of the plural conveyor rollers wherein the revolutions embody a measure of the distance traveled on the transport mechanism by the carriage. The apparatus also includes at least a first and a second initiator for determining the current position of the carriage on the transport mechanism. The first initiator detects a first position of the carriage. The second initiator detects a second position of the carriage.

Abstract: A thermal transfer sheet suitable for preparing a lighographic printing form cylinder is provided including a substrate layer and a donor layer. The substrate layer includes a first polymer having mechanical stability at temperatures greater than 150 degrees C. and light transmission of at least 70% for wavelengths of from about 700 nm to about 1600 nm. The donor layer includes a second polymer having acidic groups and/or optionally substituted amide groups and an additive is capable of converting incident laser light energy into heat energy. A wetting aid and/or a solvent are also included in the donor layer. A method of making the thermal transfer sheet is also provided.

Abstract: A distribution drive for a roll in a processing machine, and particularly in a press which has an improved axial motion distribution mechanism and which requires little installation space. This is achieved by an input drive mechanism coupled to a drive having at least one pinion gear 8 which is coupled to a gear 10. Arranged on a side face of the gear 10 is a first pin 17 which, together with a second pin 22, forms a rotary joint 20 by the first pin 17 penetrating the second pin 22. Together with a bearing arm 23, the second pin 22 forms a sliding joint 21, with the second pin 22 being accommodated at the ends in the bearing arm 23, and the bearing arm 23 being coupled to the roll 3.