EP0734858B1 - Sheetguiding roller with adjustable outside surface - Google Patents
Sheetguiding roller with adjustable outside surface Download PDFInfo
- Publication number
- EP0734858B1 EP0734858B1 EP96104022A EP96104022A EP0734858B1 EP 0734858 B1 EP0734858 B1 EP 0734858B1 EP 96104022 A EP96104022 A EP 96104022A EP 96104022 A EP96104022 A EP 96104022A EP 0734858 B1 EP0734858 B1 EP 0734858B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheet guiding
- guiding drum
- cover foil
- drum according
- peripheral
- 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.)
- Expired - Lifetime
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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 guide drum for a sheet-fed rotary printing machine, the outer surface of the sheet guide drum being provided with a jacket film, the radial position of which can be changed by means of an adjustable element.
- a sheet guide drum of the specified type in which an element which is variable in height by elastic deformation is arranged between the jacket film and the surface of the sheet guide drum in order to adapt the outer diameter of a jacket film, the jacket film at a clamping point the sheet guide drum is fastened with an adjusting device in such a way that the adjusting device detects movement of the jacket film both in Circumferential direction as well as in the radial direction effected simultaneously.
- This known configuration is complex and has the disadvantage that temperature fluctuations have a strong influence on the outside diameter of the jacket film, since the outside diameter depends on the clamping length of the jacket film.
- DE 25 30 365 A1 also discloses a device for adjusting the diameter of a roller, the lateral surface of which is divided into several segments which are fastened on radially movable supports.
- the carriers are mounted on eccentric spindles which are connected via a device converting an axial adjustment path into a rotary movement with an actuator which can be moved coaxially to the roller shaft and which is axially adjustable by means of an adjusting device.
- an actuator which can be moved coaxially to the roller shaft and which is axially adjustable by means of an adjusting device.
- the invention has for its object to provide a sheet guide drum of the type mentioned, which is characterized by low construction costs and stability of the outer diameter set in each case.
- the jacket film has a first circumferential section after the gripper support during the rotational movement of the sheet guide drum, which can be changed in its radial position by means of the adjustable element and has a second circumferential section after the first circumferential section, which is not in its radial position is changeable.
- the design of the sheet guide drum according to the invention is based on the knowledge that the sheet after leaving the printing line, regardless of its thickness, lies against the sheet guide roller and adapts to the development speed of the drum surface. It has therefore been found that, in order to avoid impairing the print quality, it is sufficient if the outer diameter of the sheet guide drum can only be adjusted to the thickness of the respective print carrier in a partial area, namely the first peripheral section. This has the advantage that the construction costs for the sheet guide drum are reduced and the required adjustability can be achieved with simple and reliable means.
- the first circumferential section of the jacket film preferably extends over a sector of the sheet guide drum of approximately 160 °, this circumferential section directly adjoining the gripper pad.
- the adjustable element is formed by a radially movable segment, on which the inner surface of the jacket film rests.
- the position of the segment also exactly determines the position of the jacket film and the respectively set outer diameter is independent of temperature-related changes in length of the jacket film.
- the segment can advantageously be arranged at an angular distance of approximately 70 ° to 120 °, preferably at an angular distance of 90 °, from the gripper pad.
- the position of the segment can be changed in the circumferential direction.
- the adjustable element or segment preferably has a convexly curved contact surface, with which it lies along a surface line on the inner surface of the jacket film, the radius of curvature of the contact surface being equal to or smaller than the radius of the inner surface of the jacket film.
- the rigidity of the jacket film is to be chosen as far as possible such that the radial change in position of the adjustable element caused change in curvature of the jacket film remains minimal.
- the jacket film can be stretched in the device according to the invention at both circumferential ends or only at one circumferential end by spring force in the circumferential direction. It has proven to be particularly advantageous if the front end of the jacket film is attached to the gripper support and the opposite end is tensioned by a spring. It can further be provided that the front end of the jacket film, together with the gripper pad, can be adjusted in the radial direction to adapt to printing media of different thicknesses.
- an actuator can be provided to adjust the element or segment, which can be adjusted by hand and / or by motor when the machine is running.
- the guiding properties of the sheet guide drum can also be adapted to the printing medium during operation of the machine.
- the sheet guide drum shown in the drawing has a cylindrical drum shell 1, which is connected to a shaft 3 by radial walls 2.
- cutouts 4 are provided, in which there is a gripper support 5 and a gripper shaft (not shown) with grippers.
- the drum jacket 1 furthermore has a longitudinally extending, axially parallel slot 6, the width of which in the circumferential direction is approximately one fifth of the drum circumference.
- a segment 7 with a cylindrical contact surface 8 is arranged in the slot 6 and is adjustable in the radial direction.
- the cylinder axis of the contact surface 8 runs parallel to the axis of rotation of the sheet guiding drum and the cylinder radius of the contact surface 8 is smaller than the radius of the lateral surface 9 of the drum jacket 1.
- a jacket film 10 is stretched, which consists for example of a sheet.
- One end of the jacket film 10 is firmly clamped to the gripper pad 5 and the other end of the jacket film 10 is fastened to prestressed springs 11 which are arranged in the gripper channel formed by the cutouts 4.
- the jacket film 10 lies completely on the jacket surface 9 on all sides.
- the segment 7 is in a position in which the greatest distance of the contact surface 8 from the axis of rotation is equal to the radius of the lateral surface 9.
- the jacket film is therefore kept in the area of the slot 6 by the segment 7 on the same outside diameter as by the drum jacket 1.
- the segment 7 is moved radially outward with the aid of an adjusting device, not shown, for example a shaft with eccentric cams, which makes it a the position shown in FIG. 2 is reached, in which it protrudes from the contour of the lateral surface 9.
- an adjusting device not shown, for example a shaft with eccentric cams, which makes it a the position shown in FIG. 2 is reached, in which it protrudes from the contour of the lateral surface 9.
- the jacket film 10 is essentially lifted from the drum jacket 1 in the region marked Y and the circumferential length of the jacket film 10 enlarged in the peripheral portion Y accordingly.
- the change in the circumferential length in the circumferential section Y is made possible by a displacement of the casing film 10 relative to the drum casing 1 in the region of the circumferential section Z and by additional tensioning of the springs 11.
- the described adjustment of the segment 7 changes the circular cylindrical starting shape of the jacket film 10 in the peripheral section Y in the direction of an elliptical cylindrical shape.
- the required adjustment range of the segment 7 is so small in relation to the radius of the lateral surface 9 that the resulting deviation from the shape of the circular cylinder has in practice no detectable effect.
- the sheet only comes into contact with the peripheral section Z of the sheet guide drum after the sheet end has passed the printing line.
- the transport speed of the sheet in this section of the sheet guide drum therefore adjusts to the peripheral speed of the jacket film, so that there is no need for a diameter adjustment in this area.
Landscapes
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
- Fishing Rods (AREA)
- Steering Controls (AREA)
- Stringed Musical Instruments (AREA)
- Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
Abstract
Description
Die Erfindung betrifft eine Bogenführungstrommel für eine Bogen verarbeitende Rotationsdruckmaschine, wobei die Mantelfläche der Bogenführungstrommel mit einer Mantelfolie versehen ist, deren radiale Lage mittels eines verstellbaren Elements veränderbar ist.The invention relates to a sheet guide drum for a sheet-fed rotary printing machine, the outer surface of the sheet guide drum being provided with a jacket film, the radial position of which can be changed by means of an adjustable element.
Beim Bedrucken von Druckträgern unterschiedlicher Dicke ist es erforderlich, den Außendurchmesser der den Bogen vom Druckzylinder übernehmenden Bogenführungs- oder Transfertrommel an die Dicke des Druckträgers anzupassen, um den unterschiedlichen Abwicklungsverhältnissen Rechnung zu tragen und eine Beeinträchtigung der Druckqualität vor allem im Schöndruck und Schön- und Wiederdruck durch Schieben zu vermeiden.When printing on print media of different thicknesses, it is necessary to adapt the outside diameter of the sheet guide or transfer drum taking over the sheet from the printing cylinder to the thickness of the print media, in order to take into account the different processing conditions and a deterioration in the print quality, especially in straight printing and fine and reprinting to avoid by pushing.
Aus der DE 39 02 923 A1 ist eine Bogenführungstrommel der angegebenen Art bekannt, bei der zur Anpassung des Außendurchmessers einer Mantelfolie an unterschiedlich dicke Papiersorten zwischen der Mantelfolie und der Oberfläche der Bogenführungstrommel ein durch elastische Verformung höhenvariables Element angeordnet ist, wobei die Mantelfolie an einer Einspannstelle der Bogenführungstrommel mit einer Verstelleinrichtung derart befestigt ist, daß die Verstelleinrichtung eine Bewegung der Mantelfolie sowohl in Umfangsrichtung als auch in radialer Richtung gleichzeitig bewirkt. Diese bekannte Ausgestaltung ist aufwendig und hat den Nachteil, daß Temperaturschwankungen den Außendurchmesser der Mantelfolie in starkem Maße beeinflussen, da der Außendurchmesser von der Einspannlänge der Mantelfolie abhängig ist.From DE 39 02 923 A1, a sheet guide drum of the specified type is known, in which an element which is variable in height by elastic deformation is arranged between the jacket film and the surface of the sheet guide drum in order to adapt the outer diameter of a jacket film, the jacket film at a clamping point the sheet guide drum is fastened with an adjusting device in such a way that the adjusting device detects movement of the jacket film both in Circumferential direction as well as in the radial direction effected simultaneously. This known configuration is complex and has the disadvantage that temperature fluctuations have a strong influence on the outside diameter of the jacket film, since the outside diameter depends on the clamping length of the jacket film.
Es ist weiterhin aus der DE 25 30 365 A1 eine Einrichtung zur Durchmesserverstellung einer Walze bekannt, deren Mantelfläche in mehrere Segmente unterteilt ist, die auf radial bewegbaren Trägern befestigt sind. Die Träger sind auf Exzenterspindeln gelagert, die über eine einen axialen Verstellweg in eine Drehbewegung umsetzende Einrichtung mit einem koaxial zur Walzenwelle bewegbaren Stellglied verbunden sind, das mittels einer Stelleinrichtung axial verstellbar ist. Durch Verdrehen der Exzenterspindeln mit Hilfe des Stellglieds können die Träger und damit die hierauf befestigten Segmente des Walzenumfangs in radialer Richtung verstellt werden.DE 25 30 365 A1 also discloses a device for adjusting the diameter of a roller, the lateral surface of which is divided into several segments which are fastened on radially movable supports. The carriers are mounted on eccentric spindles which are connected via a device converting an axial adjustment path into a rotary movement with an actuator which can be moved coaxially to the roller shaft and which is axially adjustable by means of an adjusting device. By turning the eccentric spindles with the aid of the actuator, the carriers and thus the segments of the roller circumference fastened thereon can be adjusted in the radial direction.
Der Erfindung liegt die Aufgabe zugrunde, eine Bogenführungstrommel der eingangs genannten Art zu schaffen, die sich durch einen geringen Bauaufwand und Stabilität des jeweils eingestellten Außendurchmessers auszeichnet.The invention has for its object to provide a sheet guide drum of the type mentioned, which is characterized by low construction costs and stability of the outer diameter set in each case.
Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Mantelfolie bei der Drehbewegung der Bogenführungstrommel nach der Greiferauflage einen ersten Umfangsabschnitt aufweist, der mittels des verstellbaren Elements in seiner radialen Lage veränderbar ist und nach dem ersten Umfangsabschnitt einen zweiten Umfangsabschnitt aufweist, der in seiner radialen Lage nicht veränderbar ist.The object is achieved in that the jacket film has a first circumferential section after the gripper support during the rotational movement of the sheet guide drum, which can be changed in its radial position by means of the adjustable element and has a second circumferential section after the first circumferential section, which is not in its radial position is changeable.
Die erfindungsgemäße Ausgestaltung der Bogenführungstrommel beruht auf der Erkenntnis, daß der Bogen nach dem Verlassen der Drucklinie sich unabhängig von seiner Dicke an die Bogenführungsrolle anlegt und sich der Abwicklungsgeschwindigkeit der Trommeloberfläche anpaßt. Es wurde daher gefunden, daß es zur Vermeidung einer Beeinträchtigung der Druckqualität ausreichend ist, wenn der Außendurchmesser der Bogenführungstrommel nur in einem Teilbereich, nämlich dem ersten Umfangsabschnitt auf die Dicke des jeweiligen Druckträgers einstellbar ist. Dies hat den Vorteil, daß sich der Bauaufwand für die Bogenführungstrommel verringert und die erforderliche Verstellbarkeit mit einfachen und zuverlässigen Mitteln verwirklicht werden kann.The design of the sheet guide drum according to the invention is based on the knowledge that the sheet after leaving the printing line, regardless of its thickness, lies against the sheet guide roller and adapts to the development speed of the drum surface. It has therefore been found that, in order to avoid impairing the print quality, it is sufficient if the outer diameter of the sheet guide drum can only be adjusted to the thickness of the respective print carrier in a partial area, namely the first peripheral section. This has the advantage that the construction costs for the sheet guide drum are reduced and the required adjustability can be achieved with simple and reliable means.
Vorzugsweise erstreckt sich der erste Umfangsabschnitt der Mantelfolie über einen Sektor der Bogenführungstrommel von annähernd 160°, wobei sich dieser Umfangsabschnitt unmittelbar an die Greiferauflage anschließt. Weiterhin hat sich als vorteilhaft erwiesen, wenn das verstellbare Element durch ein radial bewegbares Segment gebildet ist, auf dem die Mantelfolie mit ihrer Innenfläche aufliegt. Durch die Position des Segments ist auch die Position der Mantelfolie genau bestimmt und der jeweils eingestellte Außendurchmesser ist von temperaturbedingten Längenänderungen der Mantelfolie unabhängig. Das Segment kann vorteilhaft in einem Winkelabstand von etwa 70° bis 120°, vorzugsweise in einem Winkelabstand von 90°, von der Greiferauflage angeordnet sein. Zusätzlich kann vorgesehen sein, daß die Lage des Segments in Umfangsrichtung veränderbar ist. Vorzugsweise weist das verstellbare Element bzw. Segment eine konvex gekrümmte Anlagefläche auf, mit der es längs einer Mantellinie an der Innenfläche der Mantelfolie anliegt, wobei der Krümmungsradius der Anlagefläche gleich oder kleiner ist als der Radius der Innenfläche der Mantelfolie.The first circumferential section of the jacket film preferably extends over a sector of the sheet guide drum of approximately 160 °, this circumferential section directly adjoining the gripper pad. It has also proven to be advantageous if the adjustable element is formed by a radially movable segment, on which the inner surface of the jacket film rests. The position of the segment also exactly determines the position of the jacket film and the respectively set outer diameter is independent of temperature-related changes in length of the jacket film. The segment can advantageously be arranged at an angular distance of approximately 70 ° to 120 °, preferably at an angular distance of 90 °, from the gripper pad. In addition, it can be provided that the position of the segment can be changed in the circumferential direction. The adjustable element or segment preferably has a convexly curved contact surface, with which it lies along a surface line on the inner surface of the jacket film, the radius of curvature of the contact surface being equal to or smaller than the radius of the inner surface of the jacket film.
Die Steifigkeit der Mantelfolie ist nach einem weiteren Vorschlag der Erfindung möglichst so zu wählen, daß die durch die radiale Lageänderung des verstellbaren Elements bewirkte Krümmungsänderung der Mantelfolie minimal bleibt. Die Mantelfolie kann bei der erfindungsgemäßen Vorrichtung an beiden Umfangsenden oder nur an einem Umfangsende durch Federkraft in Umfangsrichtung gespannt sein. Als besonders vorteilhaft hat sich erwiesen, wenn das vordere Ende der Mantelfolie an der Greiferauflage befestigt und das entgegengesetzte Ende durch eine Feder gespannt ist. Hierbei kann weiterhin vorgesehen sein, daß das vordere Ende der Mantelfolie zusammen mit der Greiferauflage zur Anpassung an unterschiedlich dicke Druckträger in radialer Richtung verstellbar ist.According to a further proposal of the invention, the rigidity of the jacket film is to be chosen as far as possible such that the radial change in position of the adjustable element caused change in curvature of the jacket film remains minimal. The jacket film can be stretched in the device according to the invention at both circumferential ends or only at one circumferential end by spring force in the circumferential direction. It has proven to be particularly advantageous if the front end of the jacket film is attached to the gripper support and the opposite end is tensioned by a spring. It can further be provided that the front end of the jacket film, together with the gripper pad, can be adjusted in the radial direction to adapt to printing media of different thicknesses.
Nach einem Vorschlag der Erfindung kann zum Verstellen des Elements bzw. Segments ein Stellantrieb vorgesehen sein, der bei laufender Maschine von Hand und/oder motorisch verstellbar ist. Hierdurch können die Führungseigenschaften der Bogenführungstrommel auch während des Betriebs der Maschine an den Druckträger angepaßt werden.According to a proposal of the invention, an actuator can be provided to adjust the element or segment, which can be adjusted by hand and / or by motor when the machine is running. As a result, the guiding properties of the sheet guide drum can also be adapted to the printing medium during operation of the machine.
Die Erfindung wird nachfolgend anhand eines Ausführungsbeispiels näher erläutert, das in in der Zeichnung schematisch dargestellt ist. Es zeigen
- Figur 1
- einen Querschnitt durch eine Bogenführungstrommel nach der Erfindung in der Grundstellung und
Figur 2- einen Querschnitt der Bogenführungstrommel gemäß Figur 1 in einer Stellung mit partiell vergrößertem Außendurchmesser.
- Figure 1
- a cross section through a sheet guide drum according to the invention in the basic position and
- Figure 2
- a cross section of the sheet guide drum according to Figure 1 in a position with a partially enlarged outer diameter.
Die in der Zeichnung dargestellte Bogenführungstrommel weist einen zylindrischen Trommelmantel 1 auf, der durch radiale Wände 2 mit einer Welle 3 verbunden ist. In dem Trommelmantel 1 und den Wänden 2 sind Ausschnitte 4 vorgesehen, in denen sich eine Greiferauflage 5 und eine nicht dargestellte Greiferwelle mit Greifern befindet. Der Trommelmantel 1 weist weiterhin einen sich in Längsrichtung erstreckenden, achsparallelen Schlitz 6 auf, dessen Breite in Umfangsrichtung etwa ein Fünftel des Trommelumfangs beträgt. In dem Schlitz 6 ist ein Segment 7 mit einer zylindriche Anlagefläche 8 angeordnet, das in radialer Richtung verstellbar ist. Die Zylinderachse der Anlagefläche 8 verläuft parallel zur Drehachse der Bogenführungstrommel und der Zylinderradius der Anlagefläche 8 ist kleiner als der Radius der Mantelfläche 9 des Trommelmantels 1.The sheet guide drum shown in the drawing has a cylindrical drum shell 1, which is connected to a
Auf den Trommelmantel 1 ist eine Mantelfolie 10 aufgespannt, die beispielsweise aus einem Blech besteht. Das eine Ende der Mantelfolie 10 ist an der Greiferauflage 5 fest eingespannt und das andere Ende der Mantelfolie 10 ist an vorgespannten Federn 11 befestigt, die in dem durch die Ausschnitte 4 gebildeten Greiferkanal angeordnet sind. In der in Figur 1 gezeigten Position liegt die Mantelfolie 10 allseits vollständig auf der Mantelfläche 9 auf. Das Segment 7 befindet sich in einer Stellung, in der der größte Abstand der Anlagefläche 8 von der Drehachse gleich dem Radius der Mantelfläche 9 ist. Die Mantelfolie wird daher auch im Bereich des Schlitzes 6 durch das Segment 7 auf dem gleichen Außendurchmesser gehalten wie durch den Trommelmantel 1.On the drum jacket 1, a
Erfordert nun die Dicke des Bedruckstoffs eine Vergrößerung des Durchmessers der Bogenführungstrommel, um deren Abwicklungsgeschwindigkeit an die geänderte Bogentransportgeschwindigkeit anpassen zu können, so wird mit Hilfe einer nicht dargestellten Verstelleinrichtung, z.B. einer Welle mit Exzenternocken, das Segment 7 radial nach außen bewegt, wodurch es eine der Darstellung gemäß Figur 2 entsprechende Stellung erreicht, in der es aus der Kontur der Mantelfläche 9 hervorsteht. Hierdurch wird die Mantelfolie 10 im wesentlichen in dem mit Y gekennzeichneten Bereich von dem Trommelmantel 1 abgehoben und die Umfangslänge der Mantelfolie 10 in dem Umfangsabschnitt Y entsprechend vergrößert. Die Änderung der Umfangslänge im Umfangsabschnitt Y wird durch eine Verschiebung der Mantelfolie 10 gegenüber dem Trommelmantel 1 im Bereich des Umfangsabschnitts Z und durch zusätzliche Spannung der Federn 11 ermöglicht. Wie die Darstellung in Figur 2 zeigt, wird durch die beschriebene Verstellung des Segments 7 die kreiszylindrische Ausgangsform der Mantelfolie 10 im Umfangsabschnitt Y in Richtung einer elliptischen Zylinderform verändert. Der erforderliche Verstellbereich des Segments 7 ist jedoch im Verhältnis zum Radius der Mantelfläche 9 so klein, daß die sich hierdurch ergebende Abweichung von der Form des Kreiszylinders in der Praxis keine feststellbare Auswirkung hat. Entscheidend ist hingegen, daß durch die Verstellung die Abwicklungslänge des Umfangsabschnitts Y der Länge der Bogenoberfläche angeglichen wird, die während des Drucks mit dem Umfangsabschnitt Y in Kontakt gebracht wird, so daß es nicht zu einem Schieben des Bogens auf der Oberfläche der Mantelfolie kommen kann.If the thickness of the substrate now requires an increase in the diameter of the sheet guide drum in order to be able to adapt its unwinding speed to the changed sheet transport speed, then the
Mit dem Umfangsabschnitt Z der Bogenführungstrommel gelangt der Bogen erst in Kontakt, nachdem das Bogenende die Drucklinie passiert hat. Die Transportgeschwindigkeit des Bogens gleicht sich daher in diesem Abschnitt der Bogenführungstrommel der Umfangsgeschwindigkeit der Mantelfolie an, so daß es in diesem Bereich einer Durchmesseranpassung nicht bedarf.The sheet only comes into contact with the peripheral section Z of the sheet guide drum after the sheet end has passed the printing line. The transport speed of the sheet in this section of the sheet guide drum therefore adjusts to the peripheral speed of the jacket film, so that there is no need for a diameter adjustment in this area.
Claims (11)
- Sheet guiding drum with a gripper support (5) for a sheet processing rotary printing press, wherein the cover surface of the sheet guiding drum is provided with a cover foil (10), the radial position of which is variable by means of an adjustable element (7), characterised in that the cover foil (10), during the rotational movement of the sheet guiding drum, after the gripper support (5), has a first peripheral section (Y) which is variable by means of the adjustable element (7) in its radial position and after the first peripheral section (Y) has a second peripheral section (Z) which is not variable in its radial position.
- Sheet guiding drum according to Claim 1, characterised in that the first peripheral section (Y) of the cover foil (10) extends across a sector of the sheet guiding drum of approximately 160°, wherein this peripheral section (Y) lies directly against the gripper support (5).
- Sheet guiding drum according to one of Claims 1 or 2, characterised in that the adjustable element (7) is constituted by a radially movable segment on which the cover foil (10) lies with its inner surface.
- Sheet guiding drum according to one of the preceding Claims, characterised in that the element (7) is arranged at an angular distance of from around 70° to 120°, preferably at an angular distance of 90°, from the gripper support (5).
- Sheet guiding drum according to one of the preceding Claims, characterised in that the position of the element (7) is variable in the peripheral direction.
- Sheet guiding drum according to one of the preceding Claims, characterised in that the adjustable element (7) has a convexly curved support surface (8) with which it lies along a surface line against the interior surface of the cover foil (10), wherein the radius of curvature of the support surface (8) is the same or smaller than the radius of the inner surface of the cover foil (10).
- Sheet guiding drum according to one of the preceding Claims, characterised in that the stiffness of the cover foil (10) is so set that the change in curvature of the cover foil (10) effected by the radial positional change of the adjustable element (7) remains minimal.
- Sheet guiding drum according to one of the preceding Claims, characterised in that the cover foil (10) is tensioned in the peripheral direction at both peripheral ends or just at one peripheral end by a spring (11).
- Sheet guiding drum according to one of the preceding Claims, characterised in that the front end of the cover foil (10) is adjustable together with the gripper support (5) for matching to differently thick print carriers in the radial direction.
- Sheet guiding drum according to one of Claims 8 or 9, characterised in that the front end of the cover foil (10) is fixed to the gripper support (5).
- Sheet guiding drum according to one of the preceding Claims, characterised in that for adjusting the element (7), an adjustment drive is provided which is adjustable with the press running by hand and/or by motor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19511341A DE19511341A1 (en) | 1995-03-28 | 1995-03-28 | Bow guide drum with adjustable outer surface |
| DE19511341 | 1995-03-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0734858A1 EP0734858A1 (en) | 1996-10-02 |
| EP0734858B1 true EP0734858B1 (en) | 1997-12-29 |
Family
ID=7757954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96104022A Expired - Lifetime EP0734858B1 (en) | 1995-03-28 | 1996-03-14 | Sheetguiding roller with adjustable outside surface |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0734858B1 (en) |
| AT (1) | ATE161474T1 (en) |
| DE (2) | DE19511341A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7320281B2 (en) | 2002-12-20 | 2008-01-22 | Heidelberger Druckmaschinen Ag | Method of varying a drum profile of a vario drum and vario drum for implementing the method |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3903596A1 (en) * | 1988-02-05 | 1989-08-17 | Norman H Kemp | PAPER GUIDE WHEEL |
| DE102009019020B4 (en) | 2008-05-23 | 2021-05-20 | Heidelberger Druckmaschinen Ag | Device for turning a sheet while it is being conveyed through a printing machine |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1358843A (en) * | 1917-01-17 | 1920-11-16 | Grass William | Printing-press |
| GB1230314A (en) * | 1969-10-23 | 1971-04-28 | ||
| DE2530365C3 (en) * | 1975-07-08 | 1979-05-17 | Maschinenfabrik Augsburg-Nuernberg Ag, 8900 Augsburg | Device for adjusting the diameter of a cylinder |
| DE2700419C3 (en) * | 1977-01-07 | 1984-10-04 | Miller Printing Equipment Corp., Pittsburgh, Pa. | Sheet transfer cylinder for sheet-fed rotary printing machines that can be set to perfecting |
| DE2824733C2 (en) * | 1978-06-06 | 1984-03-15 | Heidelberger Druckmaschinen Ag, 6900 Heidelberg | Transfer drum for perfecting presses |
| DE3024893A1 (en) * | 1980-07-01 | 1982-01-28 | Continental Gummi-Werke Ag, 3000 Hannover | ROLLER FOR THE PRESSURE TREATMENT OF TRACKS |
| GB2166388B (en) * | 1984-09-28 | 1988-10-26 | Rotaprint Plc | Expanding cylinder |
| DE3902923C2 (en) * | 1988-03-16 | 1994-06-01 | Heidelberger Druckmasch Ag | Sheet guide drum for sheet-fed rotary printing machines |
-
1995
- 1995-03-28 DE DE19511341A patent/DE19511341A1/en not_active Withdrawn
-
1996
- 1996-03-14 EP EP96104022A patent/EP0734858B1/en not_active Expired - Lifetime
- 1996-03-14 DE DE59600063T patent/DE59600063D1/en not_active Expired - Fee Related
- 1996-03-14 AT AT96104022T patent/ATE161474T1/en not_active IP Right Cessation
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7320281B2 (en) | 2002-12-20 | 2008-01-22 | Heidelberger Druckmaschinen Ag | Method of varying a drum profile of a vario drum and vario drum for implementing the method |
| DE10355045B4 (en) | 2002-12-20 | 2018-09-06 | Heidelberger Druckmaschinen Ag | Method for varying a drum profile of a vario drum and a vario drum for carrying out the method |
Also Published As
| Publication number | Publication date |
|---|---|
| ATE161474T1 (en) | 1998-01-15 |
| EP0734858A1 (en) | 1996-10-02 |
| DE59600063D1 (en) | 1998-02-05 |
| DE19511341A1 (en) | 1996-10-02 |
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