Heidelberger Druckmaschinen Ag

Heidelberger Druckmaschinen

Gerd Raasch

Richard Burkhard Mack

Peter Thoma

Rainer Klenk

Gunter Stephan

Markus Gerstenberger

Jurgen Zeltner

Joachim Herrmann

Michael Szeidl

Gerhard Gorl

Ralf Degner

Ralf Denger

A washing device for a cylinder in a printing press includes a washing cloth for removing contaminants and ink, etc. from the surface of the cylinder and an ultrasonic source directing sound energy onto the surface of the cylinder to assist a washing operation. A focusing device disposed in front of the ultrasonic source concentrates the sound energy on a substantially linear focus region on the surface of the cylinder, extending parallel to the axis of the cylinder.

Washing device for a cylinder in a printing press

A device for automatically performing nonstop pile changing in a delivery of a printing press, preferably having a high printing speed, includes a separator sword movable sidewise between two sheets for forming a gap therebetween, and supporting an upper one of the two sheets at a trailing-edge region thereof until an auxiliary pile carrier has reached an inserted position thereof The separator sword cooperates with a restraining or holding device formed as a separator wedge, so that the separator wedge is slidable under the separator sword and firmly holds the upper sheet at the trailing-edge region thereof by suction until the auxiliary pile carrier has been inserted

Device for forming an auxiliary sheet pile during a nonstop pile change

Device for contactless guidance of sheetlike material being dragged along a travel path, the device having a guide surface member extending spaced from the travel path and being provided with air-blowing nozzles, includes a guide zone formed in the guide surface member wherein the air-blowing nozzles are disposed in a manner that a common flow pattern or gap flow formed during guidance of the sheetlike material is determined essentially by a first velocity component in a direction of motion of the material along the travel path and by a second and a third velocity component directed towards two side edges, respectively, of the travel path, the second velocity component being associated with one of the side edges and the third velocity component being associated with the other of the side edge.

Device for contactless guidance of sheetlike material

Device for in-line perforation of a continuous web of material in a gap between a pair of cylinders, the web being printed on at least one side thereof, both of the cylinders being held in side walls of a perforating unit and being driven, one of the cylinders carrying elements for perforating the web of material, includes a draw roller for drawing the web of material into the perforating unit, and a separate drive motor associated with the perforating unit and connected with the draw roller and the perforating-cylinder pair for simultaneously driving the draw roller and the perforating-cylinder pair.

Device for in-line perforation of continuous webs of material

Product delivery system for a printing-press folder having a cutting unit for dividing printed webs of material into a multiplicity of printed copies or signatures, and a gripper cylinder includes a device for alternatively feeding cross-folded copies from the gripper cylinder to a device for producing a second longitudinal fold and to delivery units disposed down-line therefrom, on the one hand, and to a further chargeable delivery unit for cross-folded copies, on the other hand, the copy delivery units being chargeable facultatively in accordance with a respective production mode, the alternative feeding device including a first conveyor surface formed of delivery belts encompassing a 90.degree.-turn, a second conveyor surface disposed within the folder and formed of a conveyor belt, and a swivelable diverter for selectively delivering copies alternatively onto the first conveyor surface and onto the second conveyor surface, the swivelable diverter being connectible with a stacker.

Product delivery system for a printing-press folder

A device for damping bending vibrations in a printing-unit cylinder of a rotary printing press includes at least one damper disposed in a printing-unit cylinder and tunable to a wide-band frequency, the damper having at least one member with a natural frequency corresponding to a natural frequency of the printing-unit cylinder, and a device for supporting the damper member so that the damper member is deflected in phase opposition to a deflection of the printing-unit cylinder.

Growing community of inventors

Sandhausen, Germany

Gerd Raasch