EP0699528A2 - Sheet transfer cylinder for a printing machine - Google Patents
Sheet transfer cylinder for a printing machine Download PDFInfo
- Publication number
- EP0699528A2 EP0699528A2 EP95112126A EP95112126A EP0699528A2 EP 0699528 A2 EP0699528 A2 EP 0699528A2 EP 95112126 A EP95112126 A EP 95112126A EP 95112126 A EP95112126 A EP 95112126A EP 0699528 A2 EP0699528 A2 EP 0699528A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- drum body
- sheet
- guiding
- gripper bridges
- gripper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41F—PRINTING MACHINES OR PRESSES
- B41F21/00—Devices for conveying sheets through printing apparatus or machines
- B41F21/10—Combinations of transfer drums and grippers
Definitions
- the invention relates to a sheet-guiding drum body, provided with at least two gripper bridges, for a printing press, which is used for sheet transport within the printing press, preferably between the printing units of a rotary printing press.
- a device of this type is known from DE-AS 1 102 767. Then one or two (in the case of a double-sized drum with two sheet-bearing lateral surfaces) gripper bridges are arranged on a sheet-guiding drum.
- the gripper bar is designed with a rectangular cross-section and causes a uniform vacuum between the sheet and the associated sheet guiding device (envelope body) when rotating. The gripper bar sucks some of the air from the sheet guide, so that the sheet is pressed against the sheet guide by the normal air pressure from the inside of the sheet.
- the disadvantage here is that after the sheet has been transferred from the sheet-guiding drum to the impression cylinder, the rear area of the sheet can no longer be guided on the sheet guiding device due to the reduced vacuum, i.e. the bow lifts off. When the sheet is lifted off in the rear area, the lead is doubled in front of the printing gap formed by the impression cylinder and blanket cylinder.
- Another drum is known from DE 3 602 084 C2, which has guiding surfaces which are essentially secant between at least two gripper bridges within the drum circumference.
- the guide surfaces should serve as air scoops, which in the
- Print mode generate an air jam, which keeps the respective sheet with the printed surface away from the guiding surfaces and is thus intended to ensure lubrication-free and doubling-free sheet guidance.
- the guide surfaces can also implement the sheet guidance with a sheet guiding device arranged outside the lateral surface of the drum.
- the guide surfaces which can also be formed by guide plates, serve to guide the trailing edge of the sheet when the sheet is transferred to the subsequent printing cylinder.
- a disadvantage of these designs is that the drum has a high mass due to its design. In printing operation, depending on the number of gripper bars, individual centrifugal forces occur, which have a disadvantageous effect on the fit. Furthermore, the desired dynamic pressure is dependent on the machine speed and is therefore subject to fluctuations.
- the object of the invention is to provide a sheet-guiding drum body with low mass, which has a high degree of rigidity, so that an exact fit is achieved and the drum body itself avoids an air congestion acting on the bow and generated by guide surfaces.
- the drum body achieves a noticeable reduction in mass through the arrangement of communicating openings in the side surfaces.
- the stiffness is increased by the design, which leads to less deflection during printing and thus to improved registration.
- the reduction in mass lowers the production costs, the drum body being produced in gray cast iron, nodular cast iron or light metal castings, in particular cast aluminum.
- the communicating openings arranged in the side surfaces are dimensioned such that no air jam caused by "light surfaces” can act on the arch. When the drum body rotates, the air flow flows through the openings counter to the direction of travel of the sheet, so that the sheet is essentially only guided by centrifugal moments. It was found that there are no wave phenomena on the arch that would otherwise "flutter" the arch in the rear area. The sheet is guided quietly on the adjacent sheet guide.
- the drum body provided with communicating breakthroughs is not limited in its use to a sheet-guiding transfer drum in printing units. Rather, the drum body is also suitable as a delivery drum, intermediate drum, e.g. in extension modules etc.
- a sheet-guiding drum body 1 is arranged downstream of a printing cylinder of the previous printing unit in an offset rotary printing press, and a printing cylinder of a further printing unit is arranged downstream of the drum body 1.
- the drum body 1 (FIGS. 1 and 2) is based on a single-size pressure cylinder with a twice the diameter and thus carries two gripper bridges 4.
- the gripper bridges 4 are arranged symmetrically (180 ° offset).
- Each gripper bridge 4 consists of a gripper shaft, grippers and at least one gripper bar.
- the gripper bar supports support blocks assigned to each gripper for the individual gripper support.
- the drum body 1 is rotatably received with its two drum journals 5 in one mounting of a frame.
- the basic shape of the drum body 1 is based on a prism.
- a double-sized drum body 1 (according to FIGS. 1 and 2) there is essentially a cuboid, on the base and top surface of which the gripper bridges 4 are fixed.
- the gripper bridges 4 are thus arranged symmetrically (180 ° offset) on the circumference in this embodiment.
- the already mentioned drum pins 5 are arranged on the end faces of the cuboid in the axis of rotation of the drum body 1.
- the side surfaces of the cuboid have openings 3 which are connected to one another. The side surfaces can be flat or slightly curved.
- the double-sized drum body 1 is designed as a hollow profile 2, it can also be made of solid material or a structure, for example a honeycomb structure.
- a large number of openings 3 are made in the hollow profile 2, the solid material or the structure, which are arranged approximately congruently or offset on each side surface. Regardless of the size or location, the openings 3 of the front side wall in the sheet transport direction are designed to communicate with the rear side wall.
- an axially continuous web 6 is arranged in the hollow profile 2, which merges into the drum pin 5.
- a triple-sized drum body 1 is essentially formed with its prismatic shape by three cuboid rays (star-shaped) in the axis of rotation of the drum body 2. 3, the axis of rotation is preferably formed by the web 6.
- the cover surfaces of the cuboids are in turn assigned to the gripper bridges 4, which are arranged offset by 120 ° in the triple-sized drum body 2.
- a further training as a triple-sized drum body 1 with a prismatic shape is carried out by a trigonal prism, also called a triangular prism (FIG. 5).
- the gripper bridges 4 are in turn arranged symmetrically offset by 120 ° on the circumference.
- the side surfaces have communicating openings 3. In FIG.
- the triple-sized drum body 1 according to FIG. 3 and according to FIG. 5 is again designed as a hollow profile 2 in the present example.
- a quadruple-sized drum body 1 is essentially formed as a prismatic shape by four cuboids united in the shape of a star in the axis of rotation (FIG. 4). Alternatively, training as a tetragonal prism (square prism) is also possible (not shown).
- the gripper bridges 4 are in turn arranged symmetrically on the circumference (offset by 90 °).
- the drum body 1 is designed as a hollow profile and has a web 6 merging into the drum journal 5 in the region of the axis of rotation. Communicating openings 3 are arranged on the side surfaces of each cuboid. The side surfaces themselves can in turn be flat or curved.
- sheet guiding devices are preferably arranged, on which the sheet with the unprinted side to be led.
- the mode of action is as follows: A bow is fed from an upstream cylinder to the drum body 1. The drum body 1 takes over the bow with its gripper bridge 4. The sheet fixed in the gripper closure is guided by the drum body 1 into the sheet outlet and sheet emergence and transferred to the downstream printing cylinder. Due to the rotary movement of the drum body 1, the ambient air flows through the openings 3 and past the gripper bridges 4. Depending on the machine speed, the sheet is guided (pressed) by a centrifugal moment against the sheet guiding devices and on to the transfer area. The arch shows a smooth arch movement, without undulation of the rear area. There is therefore no air jam on the printed side of the sheet to keep it away from the guiding surfaces.
Landscapes
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
- Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
- Rotary Presses (AREA)
- Inking, Control Or Cleaning Of Printing Machines (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Discharging, Photosensitive Material Shape In Electrophotography (AREA)
Abstract
Description
Die Erfindung betrifft einen mit mindestens zwei Greiferbrücken versehenen bogenführenden Trommelkörper für eine Druckmaschine, der dem Bogentransport innerhalb der Druckmaschine, vorzugsweise zwischen den Druckwerken einer Rotationsdruckmaschine, dient.The invention relates to a sheet-guiding drum body, provided with at least two gripper bridges, for a printing press, which is used for sheet transport within the printing press, preferably between the printing units of a rotary printing press.
Eine Vorrichtung dieser Art ist aus der DE-AS 1 102 767 bekannt. Danach sind eine oder auch zwei (bei doppeltgroßer Trommel mit zwei bogentragenden Mantelflächen) Greiferbrücken an einer bogenführenden Trommel angeordnet. Die Greiferaufschlagleiste ist mit einem rechteckigen Querschnitt ausgeführt und bewirkt bei Rotation einen gleichmäßigen Unterdruck zwischen dem Bogen und der zugeordneten Bogenleiteinrichtung (Hüllkörper). Die Greiferaufschlagleiste saugt einen Teil der Luft von der Bogenleiteinrichtung ab, so daß der Bogen durch den normalen Luftdruck von der Bogeninnenseite gegen die Bogenleiteinrichtung gedrückt wird.A device of this type is known from DE-AS 1 102 767. Then one or two (in the case of a double-sized drum with two sheet-bearing lateral surfaces) gripper bridges are arranged on a sheet-guiding drum. The gripper bar is designed with a rectangular cross-section and causes a uniform vacuum between the sheet and the associated sheet guiding device (envelope body) when rotating. The gripper bar sucks some of the air from the sheet guide, so that the sheet is pressed against the sheet guide by the normal air pressure from the inside of the sheet.
Nachteilig ist dabei, daß nach Übergabe des Bogens von der bogenführenden Trommel zum Druckzylinder der hintere Bereich des Bogens infolge des abgebauten Unterdruckes nicht mehr an der Bogenleiteinrichtung geführt werden kann, d.h. der Bogen hebt ab. Das Abheben des Bogens im hinteren Bereich führt zum Vorlaufdoublieren vor dem vom Druckzylinder und Gummituchzylinder gebildeten Druckspalt.The disadvantage here is that after the sheet has been transferred from the sheet-guiding drum to the impression cylinder, the rear area of the sheet can no longer be guided on the sheet guiding device due to the reduced vacuum, i.e. the bow lifts off. When the sheet is lifted off in the rear area, the lead is doubled in front of the printing gap formed by the impression cylinder and blanket cylinder.
Aus der DE 3 602 084 C2 ist eine weitere Trommel bekannt, die zwischen mindestens zwei Greiferbrücken innerhalb des Trommelumfanges im wesentlichen als Sekante ausgebildete Leitflächen besitzt. Die Leitflächen sollen als Luftschaufeln dienen, welche imAnother drum is known from DE 3 602 084 C2, which has guiding surfaces which are essentially secant between at least two gripper bridges within the drum circumference. The guide surfaces should serve as air scoops, which in the
Druckbetrieb einen Luftstau erzeugen, der den jeweiligen Bogen mit der bedruckten Fläche von den Leitflächen fernhält und somit eine schmier- und doublierfreie Bogenführung gewährleisten soll. Die Leitflächen können auch mit einer außerhalb zur Mantelfläche der Trommel angeordneten Bogenleiteinrichtung die Bogenführung realisieren. Ebenso dienen die Leitflächen, die auch durch Leitbleche gebildet sein können, zur Führung der Bogenhinterkante bei Übergabe des Bogens an den nachfolgenden Druckzylinder.Print mode generate an air jam, which keeps the respective sheet with the printed surface away from the guiding surfaces and is thus intended to ensure lubrication-free and doubling-free sheet guidance. The guide surfaces can also implement the sheet guidance with a sheet guiding device arranged outside the lateral surface of the drum. Likewise, the guide surfaces, which can also be formed by guide plates, serve to guide the trailing edge of the sheet when the sheet is transferred to the subsequent printing cylinder.
Es ist weiterhin im Druckmaschinenbau bekannt, bogenführende Trommeln mit zwei Greiferbrücken als prismatische Körper in Form eines Quaders auszubilden. An Grund- und Deckfläche des Quaders sind die Greiferbrücken angeordnet und die vollflächig ausgeführten Seitenflächen stellen die Leitflächen dar. An den Stirnseiten sind Trommelzapfen angeordnet, welche gestellseitig gelagert sind. Abhängig von dem zu verarbeitenden Bedruckstoff können am Quader zwei kreissegmentförmige Trommelkappen angeordnet werden, die wiederum eine zylindrische Trommel bilden.It is also known in printing press construction to design sheet-guiding drums with two gripper bridges as a prismatic body in the form of a cuboid. The gripper bridges are arranged on the base and top surface of the cuboid and the full-surface side surfaces represent the guide surfaces. Drum pins are arranged on the end faces and are mounted on the frame side. Depending on the substrate to be processed, two circular segment drum caps can be arranged on the cuboid, which in turn form a cylindrical drum.
Nachteilig bei diesen Ausführungen ist, daß die Trommel durch ihre Bauart eine hohe Masse aufweist. Bei Druckbetrieb treten abhängig von der Anzahl der Greiferbrücken Einzelfliehkräfte auf, die sich nachteilig auf die Paßerhaltigkeit auswirken. Weiterhin ist der gewünschte Staudruck von der Maschinengeschwindigkeit abhängig und somit Schwankungen unterworfen.A disadvantage of these designs is that the drum has a high mass due to its design. In printing operation, depending on the number of gripper bars, individual centrifugal forces occur, which have a disadvantageous effect on the fit. Furthermore, the desired dynamic pressure is dependent on the machine speed and is therefore subject to fluctuations.
Aufgabe der Erfindung ist es einen bogenführenden Trommelkörper mit geringer Masse zu schaffen, der eine hohe Steifigkeit aufweist, so daß eine exakte Paßerhaltigkeit erzielt wird und der Trommelkörper selbst einen auf den Bogen wirkenden, von Leitflächen erzeugten, Luftstau vermeidet.The object of the invention is to provide a sheet-guiding drum body with low mass, which has a high degree of rigidity, so that an exact fit is achieved and the drum body itself avoids an air congestion acting on the bow and generated by guide surfaces.
Gelöst wird die Aufgabe durch die kennzeichnenden Merkmale des Hauptanspruches. Weiterbildungen ergeben sich aus den Unteransprüchen.The task is solved by the characteristic features of the main claim. Further training results from the subclaims.
Der Trommelkörper erreicht durch die Anordnung von kommunizierenden Durchbrüchen in den Seitenflächen eine spürbare Massereduzierung. Die Steifigkeit wird durch die Bauform erhöht, was im Druckbetrieb zu geringerer Durchbiegung und damit zu einer verbesserten Passerhaltigkeit führt. Die Massereduzierung senkt die Herstellungskosten, wobei der Trommelkörper in Grauguß, Sphäroguß oder Leichmetallguß, insbesondere Aluminiumguß hergestellt ist. Die in den Seitenflächen angeordneten kommunizierenden Durchbrüche sind derart dimensioniert, daß kein von "Leichtflächen" bewirkter Luftstau auf den Bogen wirken kann. Die Luftströmung fließt bei Rotation des Trommelkörpers durch die Durchbrüche entgegen der Bogenlaufrichtung hindurch, so daß der Bogen im wesentlichen nur noch durch Zentrifugalmomente geführt ist. Es wurde gefunden, daß keine Wellenerscheinung am Bogen auftreten, die sonst den Bogen im hinteren Bereich "flattern" lassen. Der Bogen wird ruhig an der benachbarten Bogenleiteinrichtung geführt.The drum body achieves a noticeable reduction in mass through the arrangement of communicating openings in the side surfaces. The stiffness is increased by the design, which leads to less deflection during printing and thus to improved registration. The reduction in mass lowers the production costs, the drum body being produced in gray cast iron, nodular cast iron or light metal castings, in particular cast aluminum. The communicating openings arranged in the side surfaces are dimensioned such that no air jam caused by "light surfaces" can act on the arch. When the drum body rotates, the air flow flows through the openings counter to the direction of travel of the sheet, so that the sheet is essentially only guided by centrifugal moments. It was found that there are no wave phenomena on the arch that would otherwise "flutter" the arch in the rear area. The sheet is guided quietly on the adjacent sheet guide.
Der mit kommunizierenden Durchbrüchen versehene Trommelkörper ist hinsichtlich seines Einsatzes nicht auf eine bogenführende Umführtrommel bei Druckwerken beschränkt. Vielmehr eignet sich der Trommelkörper auch als Auslegertrommel, Zwischentrommel, z.B. in Verlängerungsmodulen etc.The drum body provided with communicating breakthroughs is not limited in its use to a sheet-guiding transfer drum in printing units. Rather, the drum body is also suitable as a delivery drum, intermediate drum, e.g. in extension modules etc.
Die Erfindung soll an einem Ausführungsbeispiel näher erläutert werden. Dabei zeigen:
- Fig. 1
- einen Trommelkörper für zwei Greiferbrücken im Schnitt A-A,
- Fig. 2
- den Trommelkörper gemäß Fig. 1 in Vorderansicht,
- Fig. 3
- einen Trommelkörper für drei Greiferbrücken in Sternbauform,
- Fig. 4
- einen Trommelkörper für vier Greiferbrücken in Sternbauform,
- Fig. 5
- einen Trommelkörper für drei Greiferbrücken in Dreieckbauform.
- Fig. 1
- a drum body for two gripper bars in section AA,
- Fig. 2
- 1 in front view,
- Fig. 3
- a drum body for three star-shaped gripper bridges,
- Fig. 4
- a drum body for four star-shaped gripper bridges,
- Fig. 5
- a drum body for three gripper bars in a triangular design.
Ein bogenführender Trommelkörper 1 ist in einer Offsetrotationsdruckmaschine einem Druckzylinder des vorhergehenden Druckwerkes nachgeordnet und dem Trommelkörper 1 ist ein Druckzylinder eines weiteren Druckwerkes nachgeordnet. Der Trommelkörper 1 (Fig. 1 und 2) ist, bezogen auf einen einfachgroßen Druckzylinder mit einem zweifachgroßen Durchmesser ausgeführt und trägt somit zwei Greiferbrücken 4. Am Umfang des Trommelkörpers 1 sind die Greiferbrücken 4 symmetrisch verteilt angeordnet (180° versetzt). Jede Greiferbrücke 4 besteht aus einer Greiferwelle, Greifern sowie mindestens einer Greiferaufschlagleiste. Die Greiferaufschlagleiste trägt für jeden Greifer zugeordnete Auflageklötzchen für die Einzelgreiferauflage. Der Trommelkörper 1 ist mit seinen beiden Trommelzapfen 5 drehbar in jeweils einer Lagerung eines Gestells aufgenommen.A sheet-guiding
Die Grundform des Trommelkörpers 1 geht von einem Prisma aus. Bei der Ausführung als zweifachgroßer Trommelkörper 1 (gemäß Fig. 1 und 2) liegt im wesentlich ein Quader vor, an dessen Grund- und Deckfläche die Greiferbrücken 4 fixiert sind. Die Greiferbrücken 4 sind somit bei dieser Ausführung symmetrisch (180° versetzt) am Umfang angeordnet. An den Stirnflächen des Quaders sind die bereits erwähnten Trommelzapfen 5 in der Drehachse des Trommelkörpers 1 angeordnet. Die Seitenflächen des Quaders weisen Durchbrüche 3 auf, die untereinander verbunden sind. Die Seitenflächen können eben oder auch leicht gekrümmt ausgebildet sein. Der Zweifachgroße Trommelkörper 1 ist im vorliegenden Beispiel als Hohlprofil 2 ausgebildet, er kann ebenso aus Vollmaterial oder einer Struktur, z.B. Wabenstruktur, ausgeführt sein. An den Seitenflächen sind eine Vielzahl von Durchbrüchen 3 in das Hohlprofil 2, das Vollmaterial oder die Struktur eingebracht, die annähernd deckungsgleich oder auch versetzt an jeder Seitenfläche angeordnet sind. Unabhängig von der Größe oder Lage sind die Durchbrüche 3 der in Bogentransportrichtung vorderen Seitenwand mit der hinteren Seitenwand kommunizierend ausgeführt. Zur Versteifung der Drehachse des zweifachgroßen Trommelkörpers 1 ist im Hohlprofil 2 ein axial durchgängiger Steg 6 angeordnet, der in die Trommelzapfen 5 übergeht.The basic shape of the
Ein dreifachgroßer Trommelkörper 1 ist im wesentlichen mit seiner prismatischen Form durch drei strahlenförmig (sternförmig) in der Drehachse des Trommelkörpers 2 vereinigte Quader gebildet. Gemäß Fig. 3 wird die Drehachse bevorzugt durch den Steg 6 gebildet. Den Deckflächen der Quader sind wiederum die Greiferbrücken 4 zugeordnet, welche bei dem dreifachgroßen Trommelkörper 2 um 120° versetzt angeordnet sind. Eine weitere Ausbildung als dreifachgroßer Trommelkörper 1 mit prismatischer Form wird durch ein trigonal es Prisma, auch Dreikantprisma genannt (Fig. 5), ausgeführt. Die Greiferbrücken 4 sind wiederum am Umfang symmetrisch um 120° versetzt angeordnet. Die Seitenflächen weisen kommunizierende Durchbrüche 3 auf. In Fig. 3 ist im Bereich der Drehachse der axial verlaufende Steg 6, analog zum zweifachgroßen Trommelkörper 1, in die Trommelzapfen 5 übergehend angeordnet. In Fig. 5 sind die Trommelzapfen 5 an den Stirnseiten angeordnet. Der dreifachgroße Trommelkörper 1 gemäß Fig. 3 und gemäß Fig. 5 ist im vorliegenden Beispiel wiederum als Hohlprofil 2 ausgeführt.A triple-
Ein vierfachgroßer Trommelkörper 1 ist im wesentlichen als prismatische Form durch vier strahlenförmig (sternförmig) in der Drehachse vereinigte Quader gebildet (Fig. 4). Alternativ bietet sich auch eine Ausbildung als tetragonales Prisma (Vierkantprisma) an (nicht gezeigt). Die Greiferbrücken 4 sind wiederum symmetrisch am Umfang (90° versetzt) angeordnet. Der Trommelkörper 1 ist als Hohlprofil ausgeführt und weist im Bereich der Drehachse einen in die Trommelzapfen 5 übergehenden Steg 6 auf. An den Seitenflächen jedes Quaders sind kommunizierende Durchbrüche 3 angeordnet. Die Seitenflächen selbst können wiederum eben oder gekrümmt ausgeführt sein.A quadruple-
Außerhalb des Trommelumfanges sind vorzugsweise Bogenleitvorrichtungen angeordnet, an denen der Bogen mit der unbedruckten Seite geführt wird. Die Wirkungsweise ist wie folgt:
Dem Trommelkörper 1 wird von einem vorgeordneten Zylinder ein Bogen zugeführt. Der Trommelkörper 1 übernimmt mit seiner Greiferbrücke 4 den Bogen. Der im Greiferschluß fixierte Bogen wird vom Trommelkörper 1 in den Bogenabgang und Bogenaufgang geführt und an den nachgeordneten Druckzylinder übergeben. Durch die Drehbewegung des Trommelkörpers 1 strömt die Umgebungsluft durch die Durchbrüche 3 und an den Greiferbrücken 4 vorbei. Der Bogen wird abhängig von der Maschinengeschwindigkeit durch ein Zentrifugalmoment gegen die Bogenleitvorrichtungen (gedrückt) und an diesen bis zum Übergabebereich geführt. Der Bogen zeigt dabei einen ruhigen Bogenlauf, ohne Wellenbewegung des hinteren Bereiches. Es wirkt somit kein Luftstau auf die bedruckte Seite des Bogens um diesen von Leitflächen fernzuhalten.Outside the drum circumference, sheet guiding devices are preferably arranged, on which the sheet with the unprinted side to be led. The mode of action is as follows:
A bow is fed from an upstream cylinder to the
- 11
- TrommelkörperDrum body
- 22nd
- HohlprofilHollow profile
- 33rd
- Durchbruchbreakthrough
- 44th
- GreiferbrückeGrab bridge
- 55
- TrommelzapfenDrum spigot
- 66
- Stegweb
Claims (9)
dadurch gekennzeichnet,
daß im wesentlichen der Trommelkörper (1) durch eine oder mehrere zusammengesetzte prismatische Formen gebildet ist, an deren Grund- und/oder Deckfläche die Greiferbrücken (4) und an deren Seitenflächen kommunizierende Durchbrüche (3) angeordnet sind.Sheet-guiding drum body for a printing press, which is mounted in side frames by means of drum pins arranged on the front and has at least two gripper bridges arranged symmetrically on the circumference,
characterized by
that essentially the drum body (1) is formed by one or more composite prismatic shapes, on the base and / or top surface of which the gripper bridges (4) and on the side surfaces communicating openings (3) are arranged.
dadurch gekennzeichnet,
daß bei einem zweifachgroßen Trommelkörper (1) mit zwei um 180° versetzt angeordneten Greiferbrücken (4) im wesentlichen die prismatische Form durch einen Quader gebildet ist.Sheet-guiding drum body according to claim 1,
characterized by
that in a double-sized drum body (1) with two gripper bridges (4) offset by 180 °, the prismatic shape is essentially formed by a cuboid.
dadurch gekennzeichnet,
daß bei einem dreifachgroßen Trommelkörper (1) mit drei um 120° versetzt angeordneten Greiferbrücken (4) im wesentlichen die prismatische Form durch ein trigonales Prisma gebildet ist.Sheet-guiding drum body according to claim 1,
characterized by
that in a triple-sized drum body (1) with three gripper bridges (4) arranged offset by 120 °, essentially the prismatic shape is formed by a trigonal prism.
dadurch gekennzeichnet,
daß bei einem dreifachgroßen Trommelkörper (1) mit drei um 120° versetzt angeordneten Greiferbrücken (4) im wesentlichen die prismatische Form durch drei strahlenförmig (sternförmig) in der Drehachse, vorzugsweise einem Steg (6), vereinigte Quader gebildet ist.Sheet-guiding drum body according to claim 1,
characterized by
that in a triple-sized drum body (1) with three gripper bridges (4) staggered by 120 °, essentially the prismatic shape is formed by three rays (star-shaped) in the axis of rotation, preferably a web (6), united cuboids.
dadurch gekennzeichnet,
daß bei einem vierfachgroßen Trommelkörper (1) mit vier um 90° versetzt angeordneten Greiferbrücken (4) im wesentlichen die prismatische Form durch vier strahlenförmig (sternförmig) in der Drehachse, vorzugsweise einem Steg (6), vereinigte Quader gebildet ist.Sheet-guiding drum body according to claim 1,
characterized by
that in a quadruple-sized drum body (1) with four gripper bridges (4) arranged offset by 90 °, essentially the prismatic shape is formed by four cuboids united in the form of a star in the axis of rotation, preferably a web (6).
dadurch gekennzeichnet,
daß die kommunizierenden Durchbrüche (3) von gleicher oder unterschiedlicher Größe sind.Sheet-guiding drum body according to claims 1 to 5,
characterized by
that the communicating breakthroughs (3) are of the same or different sizes.
dadurch gekennzeichnet,
daß der Trommelkörper (1) aus einem Hohlprofil (2) gebildet ist.Sheet-guiding drum body according to claims 1 to 6,
characterized by
that the drum body (1) is formed from a hollow profile (2).
dadurch gekennzeichnet,
daß dem Trommelkörper (1) außerhalb des Trommelumfanges eine Bogenleitvorrichtung zugeordnet ist.Sheet-guiding drum body according to claims 1 to 6,
characterized by
that a sheet guide device is assigned to the drum body (1) outside the drum circumference.
dadurch gekennzeichnet,
daß die prismatische Form ebene oder gekrümmte Seitenflächen aufweist.Sheet-guiding drum body according to claims 1 to 6,
characterized by
that the prismatic shape has flat or curved side surfaces.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4431114 | 1994-09-01 | ||
| DE4431114A DE4431114C2 (en) | 1994-09-01 | 1994-09-01 | Sheet-guiding drum body for a printing machine |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0699528A2 true EP0699528A2 (en) | 1996-03-06 |
| EP0699528A3 EP0699528A3 (en) | 1996-12-27 |
| EP0699528B1 EP0699528B1 (en) | 1999-04-07 |
Family
ID=6527148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95112126A Expired - Lifetime EP0699528B1 (en) | 1994-09-01 | 1995-08-02 | Sheet transfer cylinder for a printing machine |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5669305A (en) |
| EP (1) | EP0699528B1 (en) |
| AT (1) | ATE178532T1 (en) |
| DE (2) | DE4431114C2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19848720A1 (en) * | 1998-10-22 | 2000-05-18 | Bundesdruckerei Gmbh | Printing machine sheet transport aids comprise radially protruding axially free rollers on guide cylinder casing to space sheet from cylinder. |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4442301C5 (en) * | 1994-09-05 | 2006-12-14 | Heidelberger Druckmaschinen Ag | Sheet transfer drum |
| DE29918309U1 (en) * | 1999-10-16 | 1999-12-23 | Roland Man Druckmasch | Transfer drum for sheet printing machines |
| DE20001970U1 (en) | 2000-02-04 | 2000-03-23 | Roland Man Druckmasch | Sheet-guiding drum body for a sheet-fed rotary printing machine |
| GB2387040B (en) * | 2002-03-28 | 2004-03-10 | Wheeler & Clinch Ltd | A contact |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1102767B (en) | 1958-08-21 | 1961-03-23 | Miehle Goss Dexter Inc | Sheet transport device on printing presses |
| DE3602084C2 (en) | 1986-01-24 | 1989-12-28 | Heidelberger Druckmaschinen Ag, 6900 Heidelberg, De |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DD57345A (en) * | ||||
| DE725705C (en) * | 1941-01-25 | 1942-09-28 | Willy Mailaender | Rotary rubber printing machine for multi-colored printing of metal sheets |
| US2933039A (en) * | 1958-08-21 | 1960-04-19 | Miehle Goss Dexter Inc | Sheet transferring mechanism |
| US3287013A (en) * | 1964-11-12 | 1966-11-22 | Itek Corp | Roller rframe |
| US3642274A (en) * | 1970-08-07 | 1972-02-15 | Francis Walter Herrington | Sheet-supporting assembly for an inverter roll |
| US3780925A (en) * | 1972-10-10 | 1973-12-25 | N Ternes | Retractable wheel for paper guiding cylinder |
| DD273604B3 (en) * | 1988-07-05 | 1993-03-11 | Kba Planeta Ag | BOGENFUEHRUNGSZYLINDER |
| DE3929228A1 (en) * | 1989-09-02 | 1991-03-21 | Koenig & Bauer Ag | TRANSFER DRUM |
| DE9116367U1 (en) * | 1991-06-15 | 1992-09-24 | Koenig & Bauer Ag, 8700 Wuerzburg, De | |
| GB2268162A (en) * | 1992-06-19 | 1994-01-05 | Shinohara Machinery Co Ltd | Sheet-feeding cylinder with grippers. |
-
1994
- 1994-09-01 DE DE4431114A patent/DE4431114C2/en not_active Expired - Fee Related
-
1995
- 1995-08-02 AT AT95112126T patent/ATE178532T1/en not_active IP Right Cessation
- 1995-08-02 DE DE59505569T patent/DE59505569D1/en not_active Expired - Lifetime
- 1995-08-02 EP EP95112126A patent/EP0699528B1/en not_active Expired - Lifetime
- 1995-09-01 US US08/522,629 patent/US5669305A/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1102767B (en) | 1958-08-21 | 1961-03-23 | Miehle Goss Dexter Inc | Sheet transport device on printing presses |
| DE3602084C2 (en) | 1986-01-24 | 1989-12-28 | Heidelberger Druckmaschinen Ag, 6900 Heidelberg, De |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19848720A1 (en) * | 1998-10-22 | 2000-05-18 | Bundesdruckerei Gmbh | Printing machine sheet transport aids comprise radially protruding axially free rollers on guide cylinder casing to space sheet from cylinder. |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE178532T1 (en) | 1999-04-15 |
| EP0699528A3 (en) | 1996-12-27 |
| DE4431114C2 (en) | 1999-11-18 |
| DE59505569D1 (en) | 1999-05-12 |
| DE4431114A1 (en) | 1996-03-07 |
| US5669305A (en) | 1997-09-23 |
| EP0699528B1 (en) | 1999-04-07 |
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