Abstract: A device for presetting a cut-off register in a folder of a web-fed printing press, includes a marking device for applying at least one mark in an image-free region between two printed images of a web, a detector for detecting the image-free region on the web, the detector being connected to the marking device for signalling the marking device when the image-free region is detected thereby, the marking device being disposed a defined distance in front of a nip located between cylinders of at least one printing unit, and a device for activating the marking device to apply a mark to the image-free region of the web when a respective output signal of the detector indicates the presence of the image-free region on the web.

Abstract: A device for extracting samples from a folder, includes a cutting cylinder pair including a blade cylinder and a grooved cylinder, the blade cylinder having at least one cutting blade mounted on the periphery thereof, the grooved cylinder having at least one groove bar, a respective holding device for signatures assigned to the groove bar, conveyor tapes for conveying signatures emerging from a nip between the blade cylinder and the grooved cylinder of the cutting cylinder pair to a signature delivery and to a conveyor unit assigned to the cutting cylinder pair, and a device for remotely controlling the holding devices.

Abstract: A device for presetting a cut-off register in a folder of a web-fed printing press, includes a marking device for applying at least one mark in an image-free region between two printed images of a web, a detector for detecting the image-free region on the web, the detector being connected to the marking device for signalling the marking device when the image-free region is detected thereby, the marking device being disposed a defined distance in front of a nip located between cylinders of at least one printing unit, and a device for activating the marking device to apply a mark to the image-free region of the web when a respective output signal of the detector indicates the presence of the image-free region on the web.

Abstract: A device for the identification of a roller shell includes a microchip incorporated into a flexible material roller shell for printing presses. A scanning device excites the microchip for emitting signals permitting a definite identification of the microchip and of the roller shell.

Abstract: A folder delivery apparatus for single or multiple-stream production includes several delivery systems which are operable in parallel and can be driven independently of one another. During operation of the folder as well as during machine standstill, the delivery systems can be simultaneously shifted automatically or manually through adjustment units, in such a way that while adjustment takes place, the distance between the delivery systems can be set as desired within a minimal and a maximal setting position.

Abstract: A tubular printing blanket for a blanket cylinder in an offset printing press includes a cylindrical sleeve, a compressible layer over the sleeve, and an inextensible layer over the compressible layer. The cylindrical sleeve is movable telescopically over a blanket cylinder. The compressible layer includes a first seamless tubular body of elastomeric material containing compressible microspheres. The inextensible layer includes a second seamless tubular body of elastomeric material containing a tubular sublayer of circumferentially inextensible material. A seamless tubular printing layer over the inextensible layer has a continuous, gapless cylindrical printing surface. Methods of manufacturing the tubular printing blanket are also disclosed.

Abstract: A device for presetting a cut-off register in a folder of a web-fed printing press, includes a marking device for applying at least one mark in an image-free region between two printed images of a web, a detector for detecting the image-free region on the web, the detector being connected to the marking device for signalling the marking device when the image-free region is detected thereby, the marking device being disposed a defined distance in front of a nip located between cylinders of at least one printing unit, and a device for activating the marking device to apply a mark to the image-free region of the web when a respective output signal of the detector indicates the presence of the image-free region on the web.

Abstract: A method of cleaning a mechanism having ink-conducting rollable cylindrical members in a printing unit of a rotary printing press includes spraying solvent into a nip between the ink-conducting rollable cylindrical members, rotating the ink-conducting rollable cylindrical members so as to squeeze the solvent through the nip between the rollable cylindrical members and thereby apply pressure in the nip to an ink/dampening solution mixture on the rollable cylindrical members for loosening the mixture, and removing loosened ink and impurities from the printing unit; and apparatus for performing the method.

Abstract: A device for extracting samples from a folder, includes a cutting cylinder pair including a blade cylinder and a grooved cylinder, the blade cylinder having at least one cutting blade mounted on the periphery thereof, the grooved cylinder having at least one groove bar, a respective holding device for signatures assigned to the groove bar, conveyor tapes for conveying signatures emerging from a nip between the blade cylinder and the grooved cylinder of the cutting cylinder pair to a signature delivery and to a conveyor unit assigned to the cutting cylinder pair, and a device for remotely controlling the holding devices.

Abstract: In a fan delivery unit of a folder having a plurality of fan discs arranged next to one another on a motor shaft, the fan discs being formed with a plurality of fan blades having fan pockets therebetween, there is provided a device for braking printed products. The braking device includes driven brake shaft disposed parallel to the motor shaft, a plurality of brake rollers corresponding in number to the number of fan discs being mounted on the brake shaft, and a device for driving the brake shaft via the motor shaft selectively in one of two rotational directions. The brake rollers and leading edges of the fan blades are cooperative for delaying travel of a printed product introduced into the respective fan pockets.

Abstract: In an angle bar turning a web having an exterior pipe formed with outlet openings, an air regulating device includes a zone tube disposed within and radially spaced from the exterior pipe so as to define an annular space therebetween, structure for dividing the annular space into a plurality of mutually isolated zones in longitudinal direction of the exterior pipe, the zone tube having at least one air outlet opening formed therein in each of the zones for coordination with the outlet openings formed in the exterior pipe, and an air controller tube disposed within the zone tube and being formed in circumferential direction thereof with at least two zonal combinations of outlet openings differing from one another, the air controller tube being turnable about the longitudinal axis thereof within the zone tube.

Abstract: A drive for a rotary printing machine including a clutch for coupling two transmissions in a given phase relationship, the clutch being formed of two clutch halves, respectively, and having mutual coupling devices disposed at respective end faces thereof and offset eccentrically from a longitudinal axis thereof, both of the coupling devices being formed with respective, mutually engageable centering surfaces disposed radially thereto, the centering surfaces being disengageable from one another out of a coupled state, wherein the centering surfaces are mutually engaged, and into an uncoupled state, wherein a failsafe disconnection of the centering surfaces exists and the two transmissions are completely separated from one another.

Abstract: A brush-type dampening unit in a rotary printing machine, includes at least one revolving carrier member having a multiplicity of brush bristles arranged thereon a pan roller dipping at least partly into a dampening-fluid pan, and revolving in a direction opposite to that of the carrier member, adjusting means for adjusting the position of the carrier member with respect to the pan roller, the revolving carrier member and pan roller having respective separately controllable drives independent of a drive of the printing machine, and means for zonally metering a quantity of dampening fluid over the width of the machine, as well as for influencing a direction of movement of the dampening fluid.

Abstract: A film dampening system for a rotary offset press has a pan roller (101) rotated by a variable speed electric motor (111), the pan roller being covered with a hydrophilic material and being partially immersed in a trough (107) containing dampening solutions; an elastomer-covered metering roller (102) rotating at a speed related to the speed of the pan roller (101); a dampening drum (103) fitted with hydrophilic material; and an elastomer-covered dampening roller (104) in contact with the dampening drum (103) and with the plate cylinder (105) of the press.

Abstract: A method of assuring orderly web travel in a folder includes stamping out of a layered structure formed of mutually superimposed web surface portions, along respective strips thereof, a plurality of tongue-like elements remaining appendant to the web surface portions and projecting through respective holes simultaneously stamped out of the web surface portions so as thereby to hold the web surface portions together at the respective strips thereof; and a device for performing the method.

Abstract: A delivery device in a folding apparatus of a printing press includes a fan wheel or several fan wheels disposed next to one another. The fan wheels are formed of individual fan blades, between which fan wheel pockets are formed. Leading edges of the fan blades have a first profile and trailing edges of the fan blades have a second profile.

Abstract: A fan delivery for a rotary printing press, includes a drive shaft, a fan arrangement including a plurality of fan blade assemblies disposed adjacent and spaced from one another on the drive shaft, signature guides formed with arcuate recesses, respectively mounted between mutually adjacent fan blade assemblies of the fan arrangement, and a device for adjusting at least some of the signature guides with respect to the fan blade assemblies for varying formats of signatures in accordance with the size of the signatures.

Abstract: The invention relates to a deceleration device for folded products, with which folded products following one behind the other are gripped by decelerable transport devices (6, 7) and conveyed. The oppositely arranged transport devices (6, 7) tracing a path of motion (15) are driven by a planetary gearing (16). While planetary gears (21, 22) rotate around a sun gear (23), an instantaneous centre P1 describe a cardioid which, via drive brackets (17, 18 and respectively 55) causes the transport devices (6, 7) to take different speeds during rotation of the planetary gears (21, 22).

Abstract: A plate cylinder of an offset printing press is adjustable. A motor has an output shaft operatively connected with the plate cylinder to, when driven, adjust the position of the plate cylinder. A tachometer provides a speed reference signal indicative of the rotational speed of the plate cylinder. A register mark error sensor provides an adjustment control signal indicating that the plate cylinder should be adjusted. A computer responds to the speed reference signal and the adjustment control signal to control a DC drive. The DC drive drives the motor at a speed which varies with the rotational speed of the plate cylinder. The plate cylinder is thereby moved to a desired position at a rate which is a function of the operating speed of the printing press. The plate cylinder is moved to the desired position at a slow rate when the printing press is operating at a slow speed and at a fast rate when the printing press is operating at a fast speed.

Abstract: In a printing press, a ductor assembly for transferring ink from a slowly rotating fountain roll to a rapidly rotating ink receiving roll includes a carriage and first and second idler rolls supported in counterrotating engagement on the carriage. In one embodiment, the ductor assembly moves between a first position in which the first idler roll contacts and picks up ink from the fountain roll, and a second position in which the second idler roll contacts and transfers ink to the ink receiving roll. The ductor assembly is driven to rotate at a speed intermediate the speeds of the fountain roll and the ink receiving roll, in a direction the same as the direction of rotation of the second idler roll about its own axis, and opposite to the direction of rotation of the first idler roll about its axis.