Heidelberger Druckmaschinen Ag

Helmut Meyer

Klaus-Dieter Kleibaumhüter

Kai Albrecht

Jurgen Maass

Jurgen Seeberger

Johann Schunn

Bertold Grutzmacher

Jochen Bechtler

Josef Reiter

Peter T Blaser

Michael Kruger

Michael Gieser

Michael Krueger

Andreas Schulz

Holger Faulhammer

Klaus Hartmann

Detlef Strunk

Georg Roessler

Franz Haaf

Ulrich Grimm

Christian Thomas

Michael Krüger

Thomas Husterer

Andreas Wagner

Robert Mueller

Markus Donges

Reinhard Janzer

Peter Eiswirth

Werner Stadler

Karlheinz Schmitt

Reiner Villhauer

Holger Scholz

Andreas Alexander

Stephan Kirchhoff

Wolfgang Dürr

Jürgen Kunz

Klaus Dieter Kleibaumhueter

A machine for processing sheets of different formats includes a pneumatic drum having an outer sleeve with pneumatic nozzle channels and an inner sleeve with a covering segment for covering the nozzle channels in a format-dependent way. A motor is provided to rotate the inner sleeve relative to the outer sleeve while the machine is running to carry out a flying format change of the pneumatic drum.

Machine having a pneumatic drum for processing sheets of different formats

A method for delivering electric power to power consumers of a printing technology machine, which permits high availability of the machine with low idling losses, includes taking start-up time periods of the power consumers into account when switching over the power delivery to power consumers of a printing machine.

Method for delivering electric power to power consumers of a printing technology machine

An electrical voltage supply device for machines processing printing material includes at least one drive motor for the transport of printing material and at least one further electrical consumer. A control unit is provided which, when the supply voltage drops below a minimum acceptable supply voltage of the machine processing printing material, switches of electrical consumers which are not required for the transport of printing material and supplies the drive motor for the transport of printing material from energy stored in the moving masses of the machine processing printing material.

Printing press without paper during power failure and method of operating the printing press

A device for controlling electric drives in machinery includes an electronic control unit for calculating in advance the electric power required by the at least one electric drive as a function of motion profiles of the electric drive. A printing material processing machine having the drive, is also provided.

Device for the controlled power consumption of electric drives in machinery and machine including the device for processing printing material

A method and device for electrically braking an electric drive in a machine for processing printing material, includes a power electronics connected between the electric drive and a DC voltage intermediate circuit. A further electric braking device is switchable between the electric drive and the power electronics. Upon a failure of a power system, a computer initiates a generator-type braking operation through the power electronics. The further electric braking device is switched on upon the failure of the power electronics.

Safe electric braking device for printing presses and method of electrically braking an electric drive in a machine processing printing material

A module for a machine for processing sheet printing materials, has interfaces for control communication, a memory unit which can be read and written and which contains the properties of the module, and also a communications device which is used for communication with further modules and/or a higher-order control system of the machine. The communications device is operatively connected to the memory unit.

Modular sheet-fed rotary printing press

An apparatus and a method for the selection of printing materials in a machine processing printing materials has at least one control computer. The operating data of the machine processing the printing materials is logged by the computer and a tolerance limit corresponding to the operating data registered is stored in the computer. When the tolerance limit is exceeded during a time interval, the printing materials produced in this time interval are registered in the control computer.

Method for selecting printing material in a printing press and printing press

A method for operating a machine that processes printing substrates in sheet form, in particular, a printing press, including a delivery device () which contains a drive () for conveying the substrate sheets and at least one opening () through which the substrate sheets are conveyed from the inside () of the delivery device () to an externally accessible region (), and further including a control device which controls at least one closing device () for opening or closing the opening () and which is operatively connected to the drive () of the delivery device (). Also provided is a device for carrying out the method. The present invention has the feature that the opening () is closed or is closed by the control device when no substrate sheet is conveyed through the opening ().

Protective device for a delivery device

A device for synchronizing processes which run on a plurality of units including a central unit linked with other units via a field bus, includes a device provided in the central unit for producing a system clock, the field bus having a vacant line for distributing the system clock to the other units, and respective multiplication devices located at the other units for multiplying the system clock; and a method of operating the device for synchronizing processes.

Method and device for synchronizing processes which are performed on a plurality of units

A device for supplying voltage to an electrical machine, in particular a paper-processing machine, having a plurality of electric drives (), electric drives () of the same supply voltage being combined into one voltage level (). The voltage supply device is characterized in that provision is made for a first DC voltage level () having electric drives () as well as an electrical component () for dissipating surplus electric energy, and provision is made for at least one second DC voltage level () which is connected to the first voltage level () via a bidirectional voltage transformer () and has further electric drives (), and one of the voltage levels () is connected to the mains supply () via a voltage transformer ().

Power supply management in paper-processing machines

The system provides for the commutation of a brushless direct-current motor. A virtual star is provided that is analogous to the motor. The virtual star is formed of resistors. A comparison device continuously comparing the voltages of the two star center points of the motor star and the virtual star in all phases. The comparison results are used to generate a signal for controlling the commutation.

Circuit for the sensorless commutation of a DC motor

A method for regulating the temperature in a printing plate imaging unit of a printing press, particularly an offset printing press, the imaging unit being operable with laser light generated by a laser diode unit which is switched on and off in accordance with an image pattern to be produced on the printing plate, includes operating, alternatively with the laser diode unit, a heat source arranged near the laser diode unit so that the temperature of the laser diode unit is as constant as possible.

Method and device for regulating the temperature in a laser-operated

Circuit arrangement for an inductive load with a rotor and at least one winding, a DC-voltage intermediate circuit and at least one switchable semiconductor rectifier of a power stage connected to the winding for passing a current therethrough, and a current regulator subject to hysteresis for regulating the current, includes control electronics connected to the current regulator for prescribing the hysteresis and the frequency of the current regulator, respectively, as a function of the current.

Circuit arrangement for an inductive load

An apparatus for measuring at least one state variable of a brushless direct-current motor includes 2 * n pole segments, wherein n=1, 2, 3, etc.. The pole segments are integral with a rotor of a brushless direct-current motor and are formed of permanently magnetic material generating a magnetic field. At least one Hall-effect element supplies an output voltage and is disposed in the vicinity of the rotor for impressing the magnetic field of the permanently magnetic segments on the output voltage from the at least one Hall-effect element. A logic unit receives the output voltage from the at least one Hall-effect element for determining the temperature of the brushless direct-current motor.

Apparatus for measuring at least one state variable of a brushless

A method for suppressing current peaks occurring during commutation in phase windings of a brushless direct-current motor, including supplying the phase windings via an indirect direct-current converter with rectangular current having an actual value measured exclusively in a direct-current link of the converter (single-current measurement), and delaying current buildup in the phase winding by a time period t.sub.v with respect to a current decay.

Growing community of inventors

Wiesloch, Germany

Helmut Meyer