Abstract: A counter-strip for a perforating device in a signature perforating assembly for a printing press is made of a resilient material and has a linearly extending bore. A support is placed in the bore and has a number of openings which will not interfere with the operation of perforating blades that are used to perforate signatures. The counter-strip is positioned in a counter-perforating cylinder and is supplied with compressed air that is used to remove paper dust from the bore.

Abstract: A method and an apparatus for axially positioning a flexible plate on a surface of a cylinder, that is divided into several axially spaced segments, utilizes a plate transport arrangement to transfer plates from a plate preparation device to the plate cylinder. The plate is axially shiftable during transport and arrives at the plate cylinder in proper axial position.

Abstract: A device for conveying flat floppy products has an inlet conveyor belt with a constant velocity, an intermediate conveyor belt with a periodically changing velocity and an outlet conveyor belt with constant velocity. The intermediate conveyor belt causes a deceleration or acceleration of the product to be conveyed. Transfer of the product between the conveyor belts takes place at respectively the same velocities of the affected belts. The drive of the intermediate conveyor belt is performed by a gear making periodic gear changes. The invention relates to the relationship between the shaft distance and the radius of the drive pulley of the intermediate conveyor belt and is particularly related to steps reducing the torque during acceleration or deceleration of the drive elements and assuring a slip-free conveyance of the products.

Abstract: Sheets or a web of material are suspended and guided by a plurality of nozzles that direct air out from a closed guidance surface. The nozzles are arranged in a central stabilizing zone and two tightening zones. The air delivered in these zones is directed generally opposite to the conveying direction of the sheets or web and away from a longitudinal axis of symmetry of the closed guidance surface.

Abstract: An arrangement for the attachment of a paper web leading edge on a paper supply roll utilizes a rapidly setting material, such as a hot melt adhesive in the form of beads, drops or dots to attach the leading edge of the first paper web layer to the second layer. The drops or beads may bridge the junction of the leading edge with the second layer. Strings or threads, which are attached to the dots of the rapidly setting adhesive, may bridge the juncture.

Abstract: A signature perforating device includes a perforating cylinder and a cooperating counter perforating cylinder. The perforating cylinder carries a perforating blade strip which is formed by a number of perforating blade elements. These elements are held in place on the perforating cylinder in a profiled blade holding strip. Individual ones of these perforating blade elements can be removed from the strip for replacement without disruption to adjacent blade elements.

Abstract: A speed control device for a multi-motor drive mechanism for driving printing press components is described. The speed control device allows the control of drive motors experiencing different instantaneous loads. This is achieved in accordance with the invention by assigning the motor having the greatest load fluctuation as the master, with the other motors assigned as slaves. A signal indicative of the demand experienced by the master is smoothed and used to control the slave motors.

Abstract: A leading edge of a paper web supply roll is prepared for utilization in a flying web splice. The paper web supply roll is supported adjacent a work carriage that is movable transversely across the face of the supply roll. As the work carriage moves across the web, a leading edge of the web is cut, spaced adhesive labels and a double sided adhesive splice tape are applied, and the lateral edges of the web adjacent the web leading edge are provided with angled lateral edge cuts.

Abstract: A printing system for a multi-color web-fed rotary printing press utilizes a plurality of printing system units that are arranged in a vertical array. Each printing system unit includes a left printing unit and a right printing unit. The left or the right units are supported in a frame which is shiftable horizontally with the respect to the frame that supports the other units.

Abstract: A spray dampening device for a printing press utilizes a plurality of magazines, each of which is assigned to cover a spray area on a dampening cylinder. Each magazine includes at least one active dampening fluid spray nozzle and one reserve, freshly prepared spray nozzle. The active nozzle can be moved out of its active position and can be replaced by the reserve nozzle if a reduction in the print quality of the press is noted.

Abstract: A cylinder for a rotary printing press is provided with a thin slit into which leading and trailing ends of a plate to be secured to the cylinder are inserted. The slit has two legs that meet at a central apex and define a generally arrow-shaped slit. A plurality of these slits can extend across the cylinder in a zig-zag shape.

Abstract: A printing unit of a rotary printing press utilizes a "waterless" planographic printing plate which is fastened on a printing cylinder. This "waterless" planographic printing plate receives ink from a short inking unit and directly prints a material to be printed. An additional printing cylinder, that is also equipped with a "waterless" planographic printing plate, acts as the counterpressure cylinder.

Abstract: A signature to be folded in a folding device is first provided with a pre-fold that is formed along the intended fold line. The signature is conveyed through a linear guide where it is pre-folded. The pre-folded signature is then delivered to a folding device where it is folded by being caused to pass between a pair of folding rollers.

Abstract: A binding device accomplishes the transverse binding or stapling of product elements in a folding apparatus that is situated downstream from a rotary printing press. One or more binding cylinders are supported for rotation with, and with respect to, a binding cylinder support which is cooperatively positioned with respect to a collection and counter-cylinder. The binding device minimizes vibrations and maintains staple-forming elements within the binding cylinder.

Abstract: A signature perforating knife that is useable to perforate multi-layer signatures is formed as a compound knife using either several knife blades or a combination of knife blades and spacer blades. Each compound perforating knife has a uniform base thickness. The specific characteristics of the compound perforating knife can be adapted in accordance with the weight of the paper web being printed and the number of layers of the multi-layer signature which will be perforated and then folded in a folding apparatus of a web-fed rotary printing press.

Abstract: A wide printed paper web is longitudinally separated into at least two partial paper webs after the last printing unit of a printing press and before being dried. The plural partial paper webs are dried in a drying device on separate or the same level. The partial paper webs are dried in a smudge-free manner and are free of longitudinal creases or folds.

Abstract: Point needles in a collecting cylinder are driven in a two stage extension process to initially needle or pierce the leading edge of a product web being cut. Once the cut has been made, the needle tips are moved further radially outwardly from the cylinder to secure the cut edge. As the signatures are transferred to a folding cylinder, the needle points are retracted along a single stage retraction curve which is different from the path traveled during the two stage extension process.

Abstract: The position of an edge of a sheet or web of material is measured by use of a beam of light passing through an opening in a diaphragm and being focused on a sensor. Anomalies on the edge of a sheet or web are prevented from providing incorrect information by proper selection of the size of the diaphragm opening.

Abstract: A flexible plate, such as a printing plate or a blanket support plate, is clamped on the surface of a cylinder by rotation of a clamping spindle that carries a movable plate end suspension lip. The clamping spindle is shiftably supported in the cylinder and moves radially out with respect to the cylinder as a full clamping torque is applied to it.

Abstract: Gear wheel play between cooperating gears of two cylinders whose axial spacing can be varied, in a rotary printing press can be eliminated by use of a free wheeling gear supported on the journal of the first of the two cylinders and engaging the gear wheel on the second cylinder. A circumferential shifting of the free wheeling gear will eliminate gear wheel play. A phase adjusting gear assembly is used to accomplish the circumferential phase shifting of this gear.