Abstract: Before image data are screened for the subsequent exposure of a printing form, files needed for the screening step are changed in such a way that the values of individual elements in the data fields are changed. The number of elements whose values are changed is determined by evaluating contiguous regions within the data fields. These can be, for example, threshold value matrices in which individual matrix elements are set to a value corresponding to the color white, or which, for the half-tones, are calibrated to a reduced value of the full-tone density. In the latter case, the full-tone image points are screened with a frequency-modulated screen.

Abstract: A method is disclosed for printing a blister film web in a packaging machine, in which molded blister shells are closed with blister film. In the method, a blister film web is supplied to a sealing apparatus via a first transport system, and molded blister shells are supplied to the sealing apparatus via a second transport system. The position of one of the molded blister shells is detected, and at least one detection signal is generated in one or more time intervals between the action time intervals of the sealing apparatus for closing the molded blister shells. A trigger signal for a printing device is generated in dependence on a detection, and optical information is applied to the blister film web by the printing device at a position along the blister film web which is arranged upstream of the sealing apparatus.

Abstract: A method for operating a printing press having a printing unit and a cleaning apparatus includes, in a first step, starting up the printing unit in order to print therewith, and in a subsequent, second step, displacing the cleaning apparatus into the printing unit running in printing operation and/or out of the printing unit running in printing operation. A printing press for implementing the method is also provided.

Abstract: A printing press includes an apparatus for handling or manipulating varnishing plates or printing plates, having a plate feed channel which is at least temporarily disposed in a plate feed position for feeding a varnishing or printing plate out of the plate feed channel to a plate cylinder. A seat or step surface for an operator is disposed above the plate feed channel.

Abstract: An apparatus for continuous alignment of sheets which are fed to a processing machine, includes an alignment cylinder on which stops for the sheets are disposed. The stops are pivoted out of the periphery of the alignment cylinder and moved on a translational movement path during an alignment phase.

Abstract: An apparatus for aligning sheets in a processing machine includes translationally movable stops or front lays which can be driven through the use of a coupler mechanism or individually actuable electric motors.

Abstract: A receiving apparatus of a folding box gluing machine for receiving guide elements, in particular a roller rail, and/or tools, such as folding devices. The guide elements and/or tools can be moved from an active position above the folding box transport plane into a parked position. The receiving apparatus has a frame, to which the guide elements and/or tools are fastened, and this frame can be pivoted about a pivot axis, the pivot axis being oriented parallel to the folding box transport direction. The receiving apparatus has a stop device which fixes the position of the frame in its parked position, with the result that said frame can be reached ergonomically by the machine operator. The frame can be moved from a horizontal position, in which the guide elements and/or tools are situated in their active position, by a pivoting movement about the pivot axis by less than 90° into an oblique position, in which the guide elements and/or the tools are situated in their parked position.

Abstract: A method for cleaning a circumferential surface of a cylinder of a printing press provides for improved cleaning to be achieved during a short time. In order to clean the circumferential surface, a cleaning fluid is first applied to the circumferential surface. In order then to remove contaminants, the contaminants a broken up mechanically after the cleaning fluid is applied and before a cleaning apparatus acting on the circumferential surface is set into operation.

Abstract: A sheet-processing assembly includes an apparatus for transporting a pallet bearing a sheet stack and a transfer conveyor having a number of transport rollers disposed transversely to the direction of transport of the pallet and a receiving fixture for a load-bearing element for the pallet, for example a lift truck fork. The receiving fixture is aligned parallel to the transport rollers. A conveying system having a transfer conveyor and a sheet-fed rotary printing press having a conveying system, are also provided.

Abstract: An apparatus and a method for conditioning dampening solution for an offset printing press, include a cation exchanger for the removal of salt-forming ions from the dampening solution. The operation of the cation exchanger leaves the pH of the dampening solution unchanged. The apparatus includes a control device based on measuring the water hardness of the dampening solution for the supply of the dampening solution to the cation exchanger. A dampening system and an offset printing press are also provided.

Abstract: A printing press includes an assembly and a cam mechanism for moving at least one part of the assembly. A cam of the cam mechanism has a curvature course with points, in particular bends or jumps, which are not constantly differentiable within a movement region of the cam. The cam mechanism can include an actuator for the temporal displacement of jolts which are induced by the points that are not constantly differentiable to the at least one part of the assembly. An adaptation of the movement which is produced to the operating state of the printing press is possible, with the result that a considerable reduction can be achieved in vibrations for all printing speeds.

Abstract: A driver element is provided for an endless saddle chain in a saddle line, wherein the saddle chain includes saddle segments and receiver segments, with the saddle segments defining a substantially saddle-shaped roof of the saddle chain. The driver element is arranged to be detachably fastened without tools to a respective one of the receiver segments. The driver element includes two driving flaps that are pre-tensioned against each other.

Abstract: A positioning device for a positioning element, which is rotationally displaceable about a first axis, including a positioning member engaged with the positioning element. The positioning member is rotatable about a second axis perpendicular to and spaced from the first axis. The positioning device further includes a slotted link disposed on the positioning element and arranged radially about the first axis, a threaded spindle rotatable about a fixed point, and a link block inserted into the slotted link it cannot be turned. The link block is defined by a spindle nut engaged with the threaded spindle. The thread pitch of the threaded spindle corresponds to a predefined range of the positioning angle of the positioning element such that the positioning element is displaceable within the range of the positioning angle by two rotations of the threaded spindle or less.

Abstract: A flat-bed diecutting machine for cutting and/or stamping and/or embossing sheets, the flat-bed diecutting machine includes a first diecutting device, a conveying device including a drive and arranged to transport the sheets to be processed through the first diecutting device, and at least one second diecutting device provided downstream of the first diecutting device so as to make it possible to process sheets that require very high cutting forces in one pass and to reduce set-up or changeover times.

Abstract: A saddle stitcher for producing personalized saddle stitched brochures includes a stitching station, at least two folded sheet feeders for the feeding of nonpersonalized folded sheets, an assembly chain, a drive system, and at least two card gluers arranged along the assembly chain which glue personalized printed matter onto the nonpersonalized folded sheets.

Abstract: An interactive tutorial teaches an operator all of the required information needed to set up, operate, maintain, and troubleshoot a folding machine. The interactive tutorial includes graphic and text displays that provide all the necessary information to the operator or short videos to show exactly how an operation should be carried out. The tutorial preferably uses a touchscreen with buttons that allow the operator to select one from several displayed folder functions, see further information regarding a particular operation, or jump to another screen. In one embodiment, the displayed information in the tutorial is not used to control any functions of the folding machine and may include at least one of an operating manual, a maintenance procedure, and a troubleshooting operation.

Abstract: A folding box gluing machine has a folding station in which portions of blanks provided with a glue strip are folded, and a subsequent transfer station which includes as a conveyor mechanism at least two pairs of conveying straps, each including an upper and a lower strap, and having a device for achieving the sideways removal of defective boxes arranged on the outside next to one pair of conveying straps. The upper conveying strap on at least one lengthwise side in the transfer station is supported in one region of its conveying path by support rollers, which are secured to a bearing plate, which is mounted with its lower edge tilted inward relative to a perpendicular plane and can move upward to a limited extent, and a guide baffle is secured on the inside next to the support rollers and extends upward from the inner edge of the upper conveying strap and is angled in the direction of the other pair of conveying straps.

Abstract: A device sets the focus of at least one exposure head on a recording material, in particular a printing plate, in an exposer for recording printing originals. An exposer has an exposure drum for holding the printing plates, and an exposure-head carrier, which contains a carrier plate for holding exposure heads, and a carrier base. The carrier plate and the carrier base are connected such that they can move by a hinge which is disposed on the front side of the exposure-head carrier, facing the exposure drum. The rear of the carrier plate is raised or lowered by a tilting drive, as a result of which the exposure heads are moved jointly and substantially radially toward the exposure drum or away from the exposure drum. The hinge is preferably formed from at least one spring plate.

Abstract: A device and a method for detecting the edge of a recording material, in particular, a printing plate, in an exposer for recording printing originals includes an exposer having an exposure drum holding the plate, and an exposure head moved axially along the drum and focusing exposure beams onto the plate. An optical fiber is let into the drum surface and an illuminating device, moved axially along the drum, radiates light radially into the fiber. A photodetector at the fiber receives the light radiated therein. Covering the light radiated in with the plate is used to detect the plate edge. Counting cycles of a feed drive moving the illuminating device determines an axial position of the edge. Alternatively, light of a light source is radiated axially into the fiber and the light emitted radially by the fiber is received using an optical detector moved by the feed drive.

Abstract: In a spring-action suction head for separating sheets from a sheet stack, a first suction chamber, which can be subjected to vacuum is provided for lifting the sheet. The first suction chamber is surrounded coaxially by a second suction chamber, which can be subjected to vacuum, for holding and lowering the spring-action suction head in a controlled manner.