Heidelberger Druckmaschinen Ag

Gerhard Heppenstiel

Hans-Jurgen Kusch

Walter D'Heureuse

Rudi Stellberger

Daniel Conzelmann

Willi Becker

Martin Greive

Andreas Fricke

Mathias Zuber

Ulrich Luckhardt

A printing press contains a distributor roller, an oscillating roller which has a roller axle and a roller barrel, and a switching device for optionally releasing, in a first operating mode, and locking, in a second operating mode, an oscillating movement of the roller barrel. The oscillating movement is driven frictionally by the distributor roller. The switching device is disposed separately from the roller axle and the roller axle is mounted so as to be adjustable relative to the switching device.

Printing press

In the region of a turner device in a sheet processing machine, a sheet-guiding device is disposed at a great spacing from the turner drum on the other side of a common tangent between a turner drum and a transfer drum.

Suction guidance device for a single-drum turner

A knock-off unit for knocking off sheet material from the circumferential surface of an impression cylinder in a rotary printing machine operatable in recto and in recto/verso or perfector printing modes, includes a knock-off device mounted on a rectilinear guide and controllable by a gripper shaft for lifting a leading region of the sheet material off the circumferential surface of the impression cylinder. The knock-off device is coupled via a transmission mechanism to said gripper shaft and, during an outward movement, said knock-off device being extended beyond the circumferential surface of the impression cylinder, initially bridging an idle stroke; an impression cylinder in combination with the knock-off unit; and a printing unit having the knock-off unit.

Device for knocking off sheet material

A device for torque compensation in a sheet-processing machine includes a cam-controlled compensating mechanism having an energy storage device for exerting a force, a cam disk, and a cam follower to be thrown onto the cam disk by action of the force from the energy storage device. At least one actuating element locks the cam follower in a rest position. A reversing drum with a torque compensation device is also provided.

Device for torque compensation in a sheet-processing machine and reversing drum having a torque compensation device

A sealing device for a dampening unit on an offset printing press having a channel for receiving a dampening-solution supply and defined by a dampening-solution applicator roller and a metering roller which roll on one another, and having a seal holder mountable on a side part of the dampening unit and being in contact engagement with a sealing element, closing off one end of the channel, the sealing element having formed with an overflow opening for excess dampening solution, comprising a drain passage located between the sealing element and the seal holder and formed by a cutout on a side of the sealing element facing away from the channel, the cutout being connected with the overflow opening.

Sealing device

A feed table for a sheet processing machine, includes a double-sheet detector, and a device controllable by the detector for separating out double sheets, respectively, supplied to the feed table together with sheets to be printed, the device including first and second rotatable members for applying suction simultaneously to a sheet to be processed and to a double sheet, respectively, the first and second rotatable members being disposed on opposite sides of a sheet travel plane in which a sheet stream is conveyed, and a sheet guide disposed adjacent the sheet travel plane on the side thereof on which the first rotatable member is located, the first rotatable member being rotatable for guiding the sheet to be processed along the sheet guide and for conveying the sheet to be processed with the sheet stream.

Sheet-processing machine that prevents double feed by diverting the

Dampening unit for an offset printing machine includes a metering roller, a dampening form roller for applying dampening medium to a plate cylinder of the printing machine, the metering roller and the form roller being in mutually pressing engagement at a contact zone along respective axially parallel lines on respective casings of the rollers, a drive for rotating the metering roller and the form rolelr with circumferential speeds which are substantially in a downward direction in vicinity of the contact zone, a storage space for dampening medium located above the contact zone and defined by surfaces of the casings of the metering roller and the form roller and sealing elements located at respective ends of the metering roller and the form roller, and a traversing distributor roller disposed in direct friction contact with the metering roller.

Dampening unit for an offset printing machine

A dampening unit for an offset printing machine, includes a roller pair consisting of a metering roller, and a dampening form roller for applying dampening medium to a plate cylinder of the printing machine, the metering roller and the form roller being in mutually pressing engagement at a first contact zone along respective axially parallel lines on respective casings of the roller pair, a gear drive for driving the roller pair with circumferential speeds of the metering roller and the form roller substantially in a downward direction in vicinity of the contact zone, and means defining a storage space for dampening medium located above the contact zone and including surfaces of the casings of the roller pair and sealing elements located at respective ends of the roller pair, only the metering roller of the roller pair being driven by a gear meshing with a drive gear of the gear drive, the form roller being in driven engagement via friction contact at the first contact zone in a first position of the form roller wherein the form roller is lifted away from the plate cylinder, and being in driven engagement via friction contact both at the first contact zone and at a second contact zone between the form roller and the plate cylinder in a second position of the form roller wherein the form roller is in engagement with the plate cylinder, the metering roller being drivable at a circumferential speed increased to such an extent over that of the plate cylinder to compensate for braking moments applied to the form roller so that the form roller rotates in the second position thereof with a circumferential speed slower by an order of magnitude of 0.5% to 2% than the circumferential speed of the plate cylinder.

Growing community of inventors

Bammental, Germany

Gerhard Heppenstiel