Abstract: In a printing unit of an offset rotary printing press with two pairs of plate and rubber blanket cylinders, the first plate cylinder and the two rubber blanket cylinders are mechanically coupled and are driven by a common drive. The second plate cylinder is provided with its own drive.

Abstract: A multi-layer rubber blanket, that is intended for use on a rubber blanket cylinder, is secured at its underside to a dimensionally stable support plate. The ends of the multi-layer rubber blanket are not affected by mechanical or chemical cleaning. This is accomplished by sealing the front or end faces of the layers of the multi-layer blanket, which are situated underneath the outer, cover layer of the rubber blanket.

Abstract: A flexible plate is removed from the surface of a cylinder in a rotary printing press by supplying a fluid under pressure to a chamber into which the plate ends have been inserted. The fluid under pressure creates a positive pressure in the chamber which is sufficient to push at least one of the plate ends out of the chamber.

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: The two beveled ends of a sheet-shaped flexible support, such as a printing plate, are inserted in a slit in a plate cylinder. A bore extends laterally adjacent the slit and carries an inflatable hose. The hose can be inflated to apply a holding force against the plate ends positioned in the cylinder slit.

Abstract: A rubber blanket unit is structured having an underlying support plate with angled end legs, and an overlying rubber blanket with leading and trailing ends. The rubber blanket unit is secured to a blanket cylinder by insertion of the end legs into a thin cylinder slit. The rubber blanket ends are formed each having a reduced thickness and each further having a closure element. The leading and trailing blanket end closures cooperate to form an essentially seamless rubber blanket when the blanket unit is in place. The blanket ends are not dislodged by mechanical or chemical cleaning.

Abstract: A device for fastening a rubber blanket unit to a blanket cylinder utilizes a rubber blanket secured to the surface of a support plate which is provided with beveled ends. These ends are insertable into a narrow slit in the cylinder and are held in the slit by pressure elements. The beveled support plate end lateral surfaces are in contact with each other.

Abstract: A device for fastening a rubber blanket unit to a blanket cylinder utilizes a rubber blanket secured to the surface of a support plate which is provided with beveled ends. These ends are insertable into a narrow slit in the cylinder and are held in the slit by pressure elements. A plurality of resilient ejectors are supported in this cylinder slit and have free ends which support a filler strip. The filler strip closes the gap between the blanket ends when the rubber blanket is attached to the blanket cylinder.

Abstract: A plate end of a flexible printing plate is clamped or retained in a narrow slit in the surface of a plate cylinder. A rotatable spindle is situated adjacent a radial inner end of the cylinder slit. This spindle carries a group of pressure elements having pressure cams that are engageable with the plate ends during rotation of the spindle and which secure or clamp the plate ends in the narrow cylinder slit.

Abstract: A rubber blanket cylinder for offset printing utilizes a cylinder body that has magnetic strips to retain a rubber blanket packing comprised of a rubber blanket and a ferromagnetic rubber blanket support. A fastening strip is positioned on the circumference of the cylinder body and extends axially along the cylinder. The rubber blanket packing is prevented from wandering or shifting by the fastening strip. A free end of the fastening strip is covered by the rubber blanket which is thus fastened on the cylinder body in an essentially gap-free manner.

Abstract: A damping unit for a printing press utilizes four rollers to provide damping medium from a source of the damping medium, to a printing plate cylinder. The various rollers in the damping unit are interrelated by appropriate diameter and circumferential speeds to effectively prevent the migration of printing ink back from the printing cylinder to the damping fluid source.

Abstract: A plate clamping device which is usable to secure at least one end of a flexible plate to a cylinder utilizes a group of spring fingers that are shiftable radially in an axially extending slit in the cylinder to engage apertures in the end of the plate. The spring fingers have barbs that are receivable in these plate end apertures. The spring fingers are shiftable radially in the cylinder slit by rotation of a spindle situated in the cylinder.

Abstract: A chamber doctor blade arrangement for a short inking unit utilizes an ink trough that supports a rotatable cylinder which supplies ink from the ink trough to a screen roller. One or more driven disks are situated in the ink trough beneath the rotatable cylinder. These disks aid in the mixing and distribution of the printing ink in the ink trough.

Abstract: A fastening leg of a fastening edge of a trailing end of a flexible plate is inserted into a cooperating mounting slit in a cylinder by utilization of a plate trailing end inserting device. The trailing end of the flexible plate is caused to arc outwardly prior to insertion of the fastening leg into the mounting slot. This causes the effective length of the plate to be shortened.

Abstract: A roller for a printing machine is formed having oleophilic metal cells and hydrophilic ceramic cross pieces. The ceramic material is applied to the outer surface and is then ground away to again expose the metal. An upper portion of the metal is then removed to leave the elevated hydrophilic ceramic cross pieces.

Abstract: In the context of an inking unit with at least one pitted roll which is provided with an ink chamber doctor unit whose preferably two doctor blades arranged with a spacing in the peripheral direction of the roll and which delimit an ink chamber between them, the invention makes it possible to use a relatively small amount of ink if a rotatable fountain roll is mounted in the ink chamber to engage the pitted roll.

Abstract: The invention has to do with conveying systems for folded products coming from a folder and each made up of sheets which are overlapped so that their unoverlapped edges are sticking out sideways. For pulling the overlapped sheets out sideways and separating them, the apparatus has two gripping means moving along the sides of the system, each gripping means having a gripping gap for taking up said edges. One gripping means is placed at an angle to the direction of conveying for pulling the sheets out to the side. The gripping means are made up of belts or pulleys running at an equal speed and with a gap between them for the edges. One useful effect of the apparatus is that it is not necessary to keep to any fixed spacing between the products in their direction of transport.

Abstract: In order to prevent waste and to improve the operating safety and easy operation of a device for making printed matter with changing prints or for adding further printing to a complete print, further printing units are provided associated with a printing unit having a common counterpressurer cylinder which is constantly connected with the main drive of the machine. The printing units are each provided with a normally passive acceleration motor and after completing the acceleration process are coupled (or decoupled) with the main drive of the machine by means of a coupling, having a movable coupling element which is operatively mounted independently of the print unit gear train and which is actuated by an adjustment device.

Abstract: A device for clamping flexible printing plates onto the plate cylinder of rotary printing presses, wherein the plate cylinder has a concentric groove formed in its surface, the groove walls extending at an acute angle into the surface of the plate cylinder to define a pair of hook-like edges at the groove opening for receiving the correspondingly hook-like bent ends of the printing plate. A spindle is pivotably disposed in the groove having an axis concentric with the groove. At least one flange spring is supported on a first side of the spindle which faces a first hook-like wall edge. A clamping element is formed at one the end of the spring for engaging the front end of the printing plate against one of the hook-like groove edges. A bar disposed on the opposite side of the spindle axis and mounted to the spindle, the bar extending into the plate cylinder surface for receiving the hook-like bent rear end of the printing plate.