Heidelberger Druckmaschinen Ag

Heidleberger Druckmaschinen Ag

Willi Becker

Andreas Fricke

Arno Wirz

Hans-Peter Hiltwein

Daniel Conzelmann

Andreas Henn

Jens Friedrichs

Stefan Mutschall

Gerd Merkel

Jurgen Maass

Andreas Schulz

Josef Wehle

Frank Kropp

Jurgen Rautert

Tobias Mueller

Wilfried Vogt

Peter Stadler

Georg Glaunsinger

Karl-Heinz Helmstaedter

Juergen Rautert

Gernot Schmitt

Claus-Peter Zander

Thomas Necker

Willi Jeschke

Karl-Heinz Helmstädter

Peter Thoma

Ralf Wadlinger

Burkhard Maass

Frank Schaum

Wolfgang Dolz

Gerhard Heppenstiel

Jens Forche

Christian Görbing

Stefan Dopke

Thorsten Eckart

Olaf Lorenz

Bernhard Maul

Ivo Richter

Joachim Zarges

Farhad Haddadian

Steffen Siegemund

Walter Weber

Stefan Do/ Pke

Michaela Schwab

A method of varying a drum profile of a vario drum for transporting printing material sheets, in which shell segments of the vario drum are pivoted inward and outward. Sheet supporting elements assigned to the shell segments are reversibly deformed by pivoting the shell segments. A vario drum suitable for implementing the method and a machine containing the vario drum for processing printing material sheets contain the shell segments and the associated sheet supporting elements.

Method of varying a drum profile of a vario drum and vario drum for implementing the method

A device for feeding suction air or blowing air to a sheet-retaining device displaceable relative to a machine element in a sheet-processing machine, includes a first air-feeding element connectible in terms of flow to a suction-air or blowing-air source. A second air-feeding element cooperates telescopically with the first air-feeding element for forming an air through-passage duct connected in terms of flow to the sheet-retaining device.

Device for feeding suction air or blowing air in a sheet-processing machine

A device for feeding a plate to and/or removing a plate from a printing press includes a plate storage device for holding a new and/or used plate. The plate storage device has a linearly movable plate support. The plate is particularly a printing plate.

Device for feeding or removing a printing plate including a pivotal plate storage device having a linearly movable plate support

A device for stabilizing sheet guidance in a sheet-processing machine includes a first transport device having first gripper devices for guiding sheets to be processed, and a second transport device having second gripper devices opposing the first gripper devices. The first gripper devices are in cooperation with the opposing second gripper devices, during an operation selected from the group of operations consisting of taking over and transferring the sheets. The opposing second gripper devices are dippable into interspaces formed between the first gripper devices, and at least one supporting element is disposed in the interspaces for supporting leading corners of the sheets, the supporting element being disposed locally fixed on the first transport device. The opposing second gripper devices are disposed in a region of the supporting element and include a forked gripper formed with a cutout into which the supporting element is dippable during transfer of a leading edge of the sheet.

Device for stabilizing sheet guidance in a sheet-processing machine

In a gripper system having grippers disposed in a row and interspaces between the grippers and hold-downs for holding down in each case a free edge of a printing material sheet gripped by the grippers, the hold-downs being disposed to project into the interspaces and being mounted such that they can be displaced together with the grippers when gripping the printing material sheet.

Gripper system

A device for changing an operating state of a gripper-control device in a sheet-reversing device of a sheet-processing machine including a cylinder having an actuating shaft accommodated therein, includes an activating element cooperatively engaging with the actuating shaft for changing the operating state of the gripper control device. An actuating element is coupled mechanically with the actuating shaft. An adjusting element is movable relative to the cylinder. The adjusting element is disposed externally to the cylinder and cooperatively engages with the actuating element for moving the actuating element at least approximately synchronously with the cylinder during operation of the sheet-processing machine while the actuating shaft remains in a prescribed position with respect to the cylinder. The actuating element is changeable in position relative to the cylinder by the adjusting element, whenever the operating state is changed. A sheet-processing machine is provided with the operating-state changing device.

Device for changing the operating state of a gripper-control device in a sheet-reversing device of a sheet-processing machine and sheet-processing machine having the device

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 device for preventing a spring-loaded control roller from being lifted off a control cam therefor in a gripper control system in a sheet processing machine, includes a support mechanism disposed separately from the gripper control system. The support mechanism impresses an additional force upon the control roller in critical regions.

Device for sustaining a contact force of a control roller on a control cam appertaining thereto

A recto and verso printing press, comprising an upper gripper and a lower gripper, respectively, centrally pivotable with respect to an introduction of force, said upper gripper, in recto printing position thereof, being cooperable with a gripper pad fixed to a cylinder of the printing press, said upper gripper and said lower gripper being arranged centrally in relation to one another and to said gripper pad, and having a common center line.

Recto and verso printing press having upper and lower grippers and gripper pad with common center line

A device for fixing the position of a sheet includes a feeding table for transporting the sheet; at least one front lay disposed in vicinity of the feeding table and, in a working position, protruding upwardly beyond the plane of the feeding table; a swivellable holder to which the front lay and an adjusting device for the front lay are secured; and a adjusting device secured to the holder, the front lay and the adjusting device being disposed separated from one another on the holder, the front lay being in continuous biasing engagement, under tension, with the adjusting device, so that, by changing the position of the holder, the front lay and the adjusting device are movable from the working position into a neutral position and, conversely, from the neutral position into the working position.

Device for fixing the position of a sheet on a feeding table

An assembly including a device for holding a sheet on a cylinder participating in a reversal of the sheet, includes a region wherein the holding device is effective for holding a sheet, the effective region for the holding device being located downline, as viewed in a sheet transport direction, from an upline effective region wherein the sheet is gripped by a lifting device.

Assembly including a device for holding a sheet on a cylinder participating in a reversal of the sheet in a sheet-processing machine

A printing-machine cylinder includes a basic cylinder body and a covering element fitted to the basic cylinder body, one of the basic cylinder body and the covering element being formed with a multiplicity of recesses connectable to one of a suction-air source and a blast-air source and having, in the region of the recesses, through-channels extending from the recesses to the peripheral surface of the covering element and defining blasting/suction sections for acting upon the underside of a sheet conveyed on the peripheral surface of the cylinder; a printing machine Including the cylinder; and a method for producing the cylinder.

Printing-machine cylinder, especially an impression cylinder, for a sheet-fed rotary printing machine, and method of production

A device for transferring sheets in a sheet-processing machine includes a cylinder having at least one gripper device for the sheets, and a control device for opening and closing the gripper device, the control device having a first control cam for recto printing and a second control cam for recto/verso printing, at least one follower element for following the first and second control cams, each of the first and second control cams being formed with a through opening for accommodating a bearing element and, respectively, a cutout formed in the periphery of the first and second control cams and extending as far as the through opening for fitting the first and second control cams to and removing them from the bearing element radially. The first and second control cams, respectively, are of unipartite construction and, in peripheral direction, are aligned with one another so as to provide an at least approximately closed contour path for the at least one follower element.

Device for transferring sheets

A method for taking over a sheet by a trailing edge thereof from an upline cylinder of a sheet-fed rotary printing press and transferring the sheet by the trailing edge thereof to a gripper system, by placing a suction gripper on the sheet in a marginal region of the trailing edge and, during the sheet takeover, having the suction gripper follow the periphery of the upline cylinder, having the suction gripper guided at a constant tangent into the periphery of a downline inverting drum and, along this course, having the suction gripper execute a relative motion in the direction of the tangent so as to tauten the sheet, which comprises, upon reaching a transfer position at the gripper system, having the suction gripper execute a relative motion in the sheet transport direction and, when the grippers close, having the suction gripper and the gripper system disposed at rest relative to one another; and a transmission system for performing the method.

Method for taking over a sheet by a trailing edge thereof from an upline cylinder of a sheet-fed rotary printing press, and a transmission system for performing the method

A device for transferring to a downline sheet-guiding cylinder of a reversing device in a sheet-fed rotary printing machine, a trailing edge of a sheet guided on an upline sheet-guiding cylinder, includes at least one lifting device for lifting the trailing edge of the sheet from the upline sheet-guiding cylinder, and a gripper device disposed on the downline sheet-guiding cylinder, the gripper device having a gripper pad extensible out of the periphery of the downline sheet-guiding cylinder for receiving the trailing edge of the sheet from the lifting device outside the periphery, and retractable into the periphery of the downline sheet-guiding cylinder after receiving the trailing edge of the sheet, the lifting device being at least one adjustable blowing nozzle disposed in a stationary manner or on the upline sheet-guiding cylinder, for blowing air beneath the trailing edge of the sheet; and a method of transferring the trailing edge of the sheet.

Method and device for transferring a trailing edge of a sheet in a reversing device of a sheet-fed rotary printing machine

Growing community of inventors

Bammental, Germany

Willi Becker