Abstract: An apparatus for cleaning a tubular printing blanket, comprises a first end cap mounted to a first end portion of the tubular printing blanket; a second end cap mounted to a second end portion of the tubular printing blanket, a compressed air inlet passing through the first end cap; a compressed air supply coupled to the compress air inlet for supplying compressed air to the inside of the tubular printing blanket for stiffening the tubular printing blanket during a cleaning operation; and a cleaning element which interacts with the outside surface of the tubular printing blanket, for cleaning the tubular printing blanket.

Abstract: A device for selectively positioning at least one cylinder in a printing machine, the cylinder being rotatably mounted in a carrier and, together with the carrier, forming a unit that is adjustable into different positions, includes a pull mechanism drive for adjusting one of the cylinder and the unit into the different positions, the pull mechanism drive including a pull mechanism, the unit being held on and suspended from the pull mechanism.

Abstract: A method for image inspection and color guidance for printing products of a printing press, in which in on-line operation, actual image data of the printed images of the printed products are obtained and compared with nominal image data for the purpose of locating image defects, which comprises the steps of checking, upon the appearance of a defect, before any change in the ink feed is made, as to whether on the basis of the type of defect, some other cause than the color guidance for the deviation is possible.

Abstract: In a rotary printing machine, a folder operatable in different folding modes, and having a copy-guiding cylinder to which copies severed from a material web by a cutting-cylinder pair are feedable, the copy-guiding cylinder having a circumferential surface wherein gripping and cross-folding elements are accommodated, includes a device having movable circumferential-surface parts guidable by a respective guide element and, during folding-mode changeovers, selectively extendable into the circumferential surface of the cylinder and retractable between stationary and movable segments of the copy-guiding cylinder which are positionable relative to one another.

Abstract: A filter device for at least one electrical line connectable externally to a housing includes at least one contact pin for connecting the externally connectable electrical line to a multilayer printed circuit board having at least one support layer and at least one conductor layer, the contact pin having a part thereof located at a side of the filter device and being affixed to the printed circuit board, at least one outer layer of the printed circuit board being formed as either a holohedral or a grid-shaped shielding layer, respectively, the shielding layer being in an electrically conductive contact-connection with the housing. A contact pin of a conductor path of the conductor layer conductable to the outside is connected to the printed circuit board, the contact pin being arranged without electrical connection to the shielding layer.

Abstract: A method of controlling negative-pressure level of a lateral pulling device for laterally aligning sheets through the intermediary of a rotary valve, includes having, during an accelerating phase of the lateral pulling device, a high-level negative pressure at a suction pull bar of the lateral pulling device; upon reaching a maximum and constant speed of the suction pull bar, a medium-level negative pressure at the suction pull bar; and, after reaching a desired pulling path of the suction pull bar, up to an end position of the suction pull bar, a low-level negative pressure and no negative pressure, respectively, at the suction pull bar; and a device for performing the method.

Abstract: A support and tensioning device for an elongated corona generating electrode includes a corona charger shield member that includes a first set of wall members for serving as a shield for a corona generating electrode. The shield member includes a second set of wall members shaped to define a recess formed at one end of the shield member for receiving therein a plunger member and a spring. The recess includes an inner positioned land for engaging a head end of the spring. The second set of wall members define the recess and include walls located to define a key slot opening which extends in a longitudinal direction of the shield member. A spring resides in the recess and engages the land to restrict movement of the spring within the recess. A hollow plunger member has a generally cylindrical sidewall for supporting the plunger for rotational movement in the recess and a land on or near a head end portion of the plunger member engages a tail end of the spring.

Abstract: There is provided, in a folder for web-fed printing machines for processing webs of material with longitudinal adhesive bonding, a longitudinal folding device including a displaceable folder former movable relative to a cylinder part of the folder, and a frame carrying former outlet rollers and spindles whereon the former outlet rollers are mounted, the frame being displaceable with the longitudinal folding device; further provided is a method of adjusting the longitudinal adjusting device.

Abstract: A movable gripper unit including a housing and a first gripper arm and a second gripper arm for gripping a printed product. The first and second gripper arms are slidingly supported with respect to the housing. The housing is movable along a track. Also disclosed is a method of gripping a printed product including gripping a printed product in a gripper unit and moving the printed product with respect to the gripper unit while the printed product remains gripped.

Abstract: In a method for multi-beam exposure of a printing form, preferably with laser beams, a computer transmits printing form data to a distributor via a data line as a sequence of recording lines and the distributor cyclically distributes the recording lines onto the input stages of an optics head where N parallel laser beams are generated and modulated with the printing form data of the recording lines. The laser beams are subdivided into active and inactive laser beams, recording lines of the printing form are transmitted via the data line for the active laser beams, and empty lines are inserted into the transmitted sequence of the recording lines for the inactive laser beams. The empty lines contain data values with which the inactive laser beams are driven dark.

Abstract: A dampening unit of a planographic printing machine has a pan roller, a transfer roller, and a dampening unit roller. The transfer roller is held in bearing contact against the dampening unit roller with a regulating force such as, in particular, a spring force FF. The transfer roller, together with the pan roller, is pivotable about a pivot axis that is offset relative to the roller axis of the pan roller, and/or the pivot axis lies essentially on a tangential line running through a circumferential contact point which is formed by the transfer roller together with the dampening unit roller.

Abstract: A clamping device for firmly clamping a cylinder packing or covering on a printing machine cylinder, the clamping device having a clamping seat, a clamping jaw cooperating therewith, and an eccentric shaft, includes a support wherein the eccentric shaft and the clamping jaw are jointly mounted, the support being adjustable alternatively into a first support position and into a second support position relative to the clamping seat; and a printing machine having at least one clamping device with the foregoing construction.

Abstract: A method and an apparatus are provided for absorbing lateral sideframe vibration in printing units. A member is connected between two sideframes of a printing unit. According to one embodiment, the member is a rod and a mass slides on the rod. The mass is biased between two springs and a unit frame tie surrounds the rod. According to another embodiment, collars are disposed on the rod for adjusting the preload of the springs and additional masses may be placed on the mass sliding on the rod. A further embodiment includes a unit frame tie acting as the member and a rod connected to the unit frame tie. A mass is movable on the rod.

Abstract: A belt drive for a machine for processing flat printing materials includes an endless belt revolving during operation, a roller about which the belt is partially looped, a frame with respect to which the roller is adjustable between a working position, wherein the roller keeps the belt tensioned, and a position moved away from the working position, wherein the belt is untensioned, and a spring device for biasing the roller into the working position thereof. Also included are a double crank by which the roller is articulated with the frame, and a stop which, due to a change in position of the double crank from a position corresponding to the working position of the roller into a position corresponding to the moved-away position of the roller, is carried out to a given extent beyond a dead-center position of the double crank, prevents a change in position beyond the given extent; and a machine for processing flat printing materials, which includes the belt drive.

Abstract: An improvement in a printing machine includes a finger protector formed as a blast tube and arranged in a region of a wedgelike cylinder nip formed by an impression cylinder together with an adjustable cylinder, the adjustable cylinder being adjustable into a clearance position far removed from the impression cylinder; and a method of operating the printing machine.

Abstract: A method of operating a lifting sucker which takes sheets off a pile, the sheets being picked up and lifted by suction, which comprises determining at least one of the physical variables characterizing the method and comparing it with an associated desired value, and initiating countermeasures if there are any deviations from the desired value; and a lifting device operated by the method.

Abstract: A device for driving a pregripper having a swivellably mounted main lever and a swivellably mounted guide lever, and a gripper bar mutually coupling the main lever and the guide lever, includes a cyclical swivel drive for the main lever, and an eccentrically swivellable bearing location for the guide lever.

Abstract: An apparatus and method designed to eliminate dog-earring of the comers of the open edges of a folded signature or book without the need for the use of electrostatic adherence. A guide mechanism is provided between a tape drive, a divert cylinder and/or a deceleration drum. The guide mechanism is preferably located at the position of the open edges of the signature which is being transferred. The guide mechanism is preferably of a width which accommodates variations in the folded width of the folded signature or books. The guide mechanism includes a series of narrow slots, or micro-slots, across its width. The gripping devices which are located in the area of the guide mechanism include a series of narrow fingers, or micro-fingers, across their width. The micro-fingers of the gripping mechanisms are designed to pass through the micro-slots of the guide mechanism.

Abstract: A printing press comprises a cylinder having an outer surface and a plurality of air holes for providing air to the outer surface. A sound-damping material is located on a section of the outer surface and an axially-removable printing sleeve fits over the outer surface. Also disclosed is a method for reducing noise from a printing press comprising the steps of providing air through air holes in a cylinder having a free end to aid in placement or removal of an axially-removable printing sleeve, and providing a sound-damping surface to an outer surface of the cylinder at the free end.