Heidelberger Druckmaschinen Ag

Paul Nicola

Markus Möhringer

Peter Förch

Marius Stelter

Ralf Wadlinger

Stefan Mutschall

Hans-Jurgen Kusch

Sven Kerpe

Rudi Stellberger

Bernd Ruf

Andreas Detloff

Kurt Lotsch

Peter Marten

Gunter Zobl

Volker Bergen

Gunter Andl

Alexander Klee

Daniel Gronych

Stephan Mutschall

Rudiger Engelmann

Gabriele Vetter

Ulli Zeck

Wolfgang Kretz

Klaus Herzog

Kurt Sandmeier

An apparatus for the removal of proof sheets from a sheet-processing machine has at least one sheet catcher provided with a gripper device. The gripper draws the sheet out of the stacking region. A lower sheet catcher is first moved into the stacking region above the sheet stack. Following a deposition of at least one proof sheet, the sheet is gripped with the gripper device, and following sheets are held back with an upper sheet catcher. Then the proof sheet is drawn out of the stacking region by moving the lower sheet catcher and the gripper device back.

Method and apparatus for proof sheet removal

A sheet-processing machine, in particular a rotary press, has a first gripper system for transporting sheets onto a sheet stack and a second gripper system following the former for accepting selected sheets from the first gripper system. The second gripper system is oriented substantially vertically and it has a drive that can be actuated separately and independently from the first gripper system.

Sheet processing machine having an apparatus for removing selected sheets

A device for conveying a sheet through a typographic or printing technology machine reliably transfers a sheet from a cylinder to a trailing-edge gripper system and includes a chain conveyor, grippers for holding and taking over the leading margin of the sheet from a cylinder and grippers fixed to endless chains for holding the trailing, rear margin of the sheet. When the grippers for the trailing margin pass the cylinder, the grippers are guided in a closed state along a path outside a revolution contour of a support surface and, having passed the cylinder, the grippers are guided in an open state along a path to a radial level of the rear margin held in auxiliary grippers.

Device for conveying a sheet through a typographic machine

A sheet delivery for a press has a linear guide in which a single holding crossmember (e.g., a gripper bar) is mounted such that it can be moved to and fro periodically. The holding crossmember is mounted in a further linear guide such that it can be moved to and fro periodically along the further linear guide axis as well. The axes of the linear guides are aligned at an angle to each other.

Sheet delivery for a printing press

Sheets are conveyed through a printing machine with improved reliability of the suction grippers. The apparatus for conveying a sheet through a printing machine has a cylinder with grippers in a channel for holding the sheet at its leading edge, circulating grippers for holding and for transferring the sheet from the cylinder at its leading edge, and circulating, radially positionable suction grippers for holding the sheet at its trailing edge. An actuating apparatus opens and closes the grippers and controls vacuum for the suction grippers. A drive for the cylinder and circulating grippers and suction grippers. A control device switches on and off the sheet feed to the cylinder. The suction grippers can be moved in the radial direction into a rest position when the sheet feed is switched off.

Apparatus for conveying a sheet through a printing machine with radially moving suction grippers

A machine for processing a sheet of printing material contains a first chain conveyor having a first gripper bar for holding a leading edge of the sheet, and a second chain conveyor having a rear gripper bar for simultaneously holding a trailing end of the sheet. A processing device is assigned to the chain conveyors for processing the sheet. A distance changing device is provided for temporarily reducing a gripper distance between the two gripper bars and, consequently, producing a sheet sag required for the processing of the sheet carried out by the processing device. The distance changing device defines a first circulation path of the front gripper bar, determined by the first chain conveyor, and a second circulation path of the rear gripper bar, determined by the second chain conveyor, running locally differently from each other. The processing device can be, for example, a sheet smoother.

Machine for processing a sheet of printing material

A machine for processing printing material sheets has a signal generator for position monitoring and a sheet delivery. The sheet delivery has a first conveying device, for example with a holding crossmember, for leading sheet ends and a second conveying device, for example with a holding crossmember, for trailing sheet ends. The signal generator is disposed in the sheet delivery.

Machine for processing printing material sheets

A sheet-processing machine contains at least one processing station in the form of a printing unit, and a delivery with an endless conveyor and after-grippers that are guided by a mechanism connected to a drive. The after-grippers take over the processed sheets from the endless conveyor and release them over a stack. The sheet-processing machine provides for it to be possible for the mechanism to be set to positions that are correlated with different formats of the processed sheets, and for the drive that actuates the mechanism to keep the mechanism at one and the same phase angle with respect to the printing unit in each of the positions. Therefore, even in the event of different formats of the processed sheets, user-friendly placing of the stack is possible.

Sheet-processing rotary press with a delivery containing after-grippers

A device for conveying a sheet through a printing machine includes a cylinder, formed with a channel wherein grippers are disposed for holding the sheet at a leading edge, a chain conveyor with grippers fixed to endless chains for holding and picking up the sheet at its leading edge from the cylinder and for holding the sheet at its trailing edge, and rotating sprockets carrying the chains. An actuating device is provided for opening and closing the grippers, and a drive is provided for the cylinder and the sprockets. Gripper pads and gripper tips for the trailing-edge grippers, in opened condition of the grippers, are able to run past the cylinder. The gripper pads and tips lie underneath a path described by the sheet. The trailing-edge grippers are closable in a rotational angle region wherein the chains run off the sprockets for the cylinder.

Device for conveying a sheet through a printing machine

An apparatus for conveying sheets from a printing machine to a stack has highly rigid gripper bars that can be produced with relatively little expense, and the gripper assembly permits great flexibility in the use of the apparatus. The apparatus has at least one gripper bar carrying one or more grippers which, during the conveyance, holds a sheet at its edge between a gripper finger and a gripper pad. Endless chains move the gripper bar on a path between a cylinder belonging to the machine and the stack. An actuating mechanism opens and closes the gripper as a sheet is picked up from the cylinder and as it is allowed to fall onto the stack. In the opened state, the gripper finger is located below a path described by the upper edge of the gripper pad.

Apparatus for conveying sheets through a printing machine

A sheet-processing machine, such as a rotary press, has normally closed grippers that circulate during operation. The grippers transport the sheets along a conveying section and guide the sheets at their leading and trailing edges. The conveying section is assigned a sheet decurler and a sheet guide device that follows the latter in the conveying direction. The conveying section further has a gripper opener assigned thereto for opening the trailing edge grippers carrying the trailing edges of the sheets in order to decurl the sheets. After the sheets have traversed the decurler and decurling has been carried out, the trailing edges are once more grasped with the trailing edge grippers for renewed positive guidance.

Sheet processing machine with a sheet decurler

A machine for processing sheets of printing material has a cylinder for transporting the sheets and sheet supports which are mounted such that they can be rotated about a sheet support axis of rotation and in each case contain supporting segments for pressing the sheets onto the cylinder. The supporting segments are mounted such that they can be pivoted as desired into an active position and into a passive position about pivot axes that are skewed relative to the sheet support axis of rotation or about rotary joints determining the pivot axes.

Machine for processing sheets of printing material

Auxiliary device for assisting in singling or separating sheets in an upper region of a sheet pile provided for single-sheet transport in a sheet transport direction within a sheet processing machine, a respective top sheet of the sheet pile being removable therefrom at a given time by at least one singling or separating device including at least one sheet trailing edge blasting or blowing device for feeding the sheet to the sheet processing machine, includes at least one feeler rod disposed at a location transverse to the sheet transport direction for measuring the height of the sheet pile, and respective fanning or loosening blowers disposed laterally of the sheet pile upstream of the feeler rod, as viewed in the sheet transport direction.

Sheet-fanning device

The device for supplying printing plates to plate cylinders of printing machines includes elements for holding and for guiding printing plates. The plates can thereby be supplied to at least two different plate cylinders. The plate-holding assembly can thereby be pivoted into at least two different plate changing positions for feeding (and removing) printing printing plates at at least two printing units.

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Heidelberg, Germany

Paul Nicola