Heidelberger Druckmaschinen Ag

Heidelberger Druckmaschinen

Michael Kruger

Bernhard Wagensommer

Anton Rodi

Peter T Blaser

Jurgen Maass

Georg Rossler

Helmut Meyer

Roger R Belanger

Wolfgang Pfizenmaier

Bertold Grutzmacher

Klaus Hartmann

Hans-Jorg Laubscher

Hans Joorg Laubscher

Detlef Gihr

Berthod Grutzmacher

Stephan Edward Abbadessa

Jorg Bauer

Gotz Ruder

A device for transporting to a printing press, sheets singly separated from a sheet pile, includes an electromagnetic linear drive mechanism; and a method of operation of the device.

Device and method for transporting sheets singly separated from a sheet

A mailroom conveyor system for transporting and handling a stream of printed and folded signatures supplied by high speed tapes of a folding apparatus of a printing press. The system includes a plurality of grippers, a rail system for guiding the grippers, an electric linear drive system for individually driving the grippers in the rail system, and a control system coupled to the electric linear drive system for individually controlling the movement of the grippers in the rail system.

Mailroom conveyor system with an electric linear device

A reversing device for a sheet-fed rotary printing press, having a sheet transport device for accepting a sheet, that has been printed on one side thereof, at a leading edge thereof from an upline sheet-guiding cylinder, reversing the sheet by turning it about a longitudinal axis thereof in a sheet transport direction, and then transferring the sheet, in the reversed condition thereof with a leading edge thereof leading, to a downline sheet-guiding cylinder, and having a cam path extending substantially like that of a Mobius strip for guiding the sheet transport device, includes an electric linear drive for advancing the sheet transport device.

Reversing device with a linear drive for a sheet-fed rotary printing

A drive system for an oscillating gripper of a sheet-fed printing machine has a main drive train and a controlled drive. The pregripper is mechanically coupled to the main drive train. The controlled drive supplies energy required to drive the pregripper in accordance with a position of the pregripper. The controlled drive at least approximately meets the discontinuous energy requirement of the pregripper.

Drive system for an oscillating pregripper of a sheet-fed printing

A threading device for a machine for processing web-shaped material, having a guide rail extending at least sectionwise through the machine, includes a pulling device movable along the guide rail for pulling a web behind it, and an electric linear drive for activating the pulling device; and a method of threading the web through the processing machine.

Web-threading or infeeding device for a machine processing web-shaped

Device for conveying single sheets or a shingled sheet stream in a feeder region of a sheet-processing machine of a conveyor table equipped with at least one endless conveyor belt, and at least two rotatably supported deflection rollers over which the conveyor belt is guided, the conveyor belt being disposed so as to convey the sheets in a region between a sheet pile and front stops, wherefrom the sheets are transferable to a further processing location of the sheet-processing machine, includes a motor for driving the conveyor belt uncoupled from the sheet-processing machine, and a computer and control device for triggering the motor with a predetermined velocity profile exhibiting a velocity change as a function of an angular position of the sheet-processing machine; and method of operating the sheet-conveying device.

Method and device for conveying sheets in a feeder region of a

Drive for a printing press having a plurality of printing units having plate cylinders, elements for transporting stock, and elements which do not transport stock includes a gear-transmission device for interconnecting the printing units, a plurality of motors, respectively, coupled at various locations to the gear-transmission device, a device for controlling and regulating delivered power connected to the motors, and a device for feeding signals regarding rotational speed in the gear-transmission device to the control and regulating device, the gear-transmission device including a gear-transmission unit for driving all of the stock-transporting cylinders and the plate cylinders; at least one of the motors being connected to the gear-transmission unit; at least one sensor for detecting motion variables in the gear-transmission unit; at least one drive for driving the elements of the printing press which do not transport stock; at least another sensor for detecting motion variables in the drive for driving the elements which do not transport stock; all of the sensors being connected to the control and regulating device.

Drive for a printing press

A drive system for a printing machine with a plurality of printing units connected to one another via a gear train into which power is fed at different points by at least two motors, includes supplying each of the motors via a respective controllable, line-commutated converter. A signal is generated by each of the converters that is limited in time between two firing pulses. A current setpoint value is transferred only within a time span in which all of the converters have activated the signal. Coverage of all of the signals which are limited in time is assured in all operating states.

Drive system for a printing machine with several printing units

A device for determining the height of a pile of sheets includes a measuring sensor formed as an expansion member and drivable by compressed air with given contacting force towards a top surface of the sheet pile, and a measuring device for determining the position of the top surface of the sheet pile in accordance with a characteristic curve for time rate of change of pressure of the compressed air.

Device for determining the height of a pile of sheets

A method for measuring the rotary speed of a direct-current motor having a rotor and at least a shunt-wound field winding, wherein the field current includes an ac-component caused by mass-inhomogeneities in the rotor, including the steps of: frequency analyzing with a frequency analyzer the ac-component to form a frequency spectrum; selecting with a computing device a part of the frequency spectrum related only to the rotary speed; and determining from the selected part of the frequency spectrum the rotary speed of the motor.

Method and device for measuring rotary speed

A method of determining the rotational speed of a three-phase brushless DC-motor, which comprises scanning at least one signal trace disposed on a revolving rotor of a three-phase brushless DC-motor by means of three sensors, each emitting a signal having two possible signal states, the signal trace and the sensors being of such construction and arrangement that eight values are realized by a logical combination of the two possible signal states, respectively, of the three sensors; detecting the rotor position with six of the values; and determining the rotational speed with the other two values.

Method of determining the rotational speed of a brushless DC-motor

A device for determining the height of a pile of sheets, includes a measuring sensor formed as an expansion member and pneumatically drivable towards a top surface of the sheet pile.

Printing machine with at least one printing unit having rotating cylinders, comprising an energy converter disposed at least partially in one of the cylinders for converting at least some rotational energy of the cylinder into electrical energy and an energy storage device also disposed in the cylinder for storing the electrical energy.

Printing machine particularly a sheet-fed offset printing machine

Method of measuring the rotary speed of an electromagnetically actuated rotating device having at least one winding carrying a current, which comprises analyzing the frequency of a voltage corresponding to an alternating component of the current, and a device for performing the method.

A control circuit for an electric motor having a power control element containing a first semiconductor for driving the motor in one torque direction, and a power control element containing a second semiconductor for driving the motor in the other torque direction includes a circuit-breaker for at least isolating one of the power control elements, upon failure of the one power control element, and connecting the remainder of the circuit to the other power control element instead of the failed power control element.

Growing community of inventors

Edingen-Neckarhausen, Germany

Michael Kruger