EP0177844A2 - Device for attaching a rubber sheet to a rubber cylinder - Google Patents

Device for attaching a rubber sheet to a rubber cylinder Download PDF

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Publication number
EP0177844A2
EP0177844A2 EP85112199A EP85112199A EP0177844A2 EP 0177844 A2 EP0177844 A2 EP 0177844A2 EP 85112199 A EP85112199 A EP 85112199A EP 85112199 A EP85112199 A EP 85112199A EP 0177844 A2 EP0177844 A2 EP 0177844A2
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EP
European Patent Office
Prior art keywords
rubber blanket
cylinder
edge
cylinder slot
width
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
Application number
EP85112199A
Other languages
German (de)
French (fr)
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EP0177844A3 (en
EP0177844B1 (en
Inventor
Hermann Fischer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Manroland AG
Original Assignee
MAN Roland Druckmaschinen AG
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Filing date
Publication date
Application filed by MAN Roland Druckmaschinen AG filed Critical MAN Roland Druckmaschinen AG
Publication of EP0177844A2 publication Critical patent/EP0177844A2/en
Publication of EP0177844A3 publication Critical patent/EP0177844A3/en
Application granted granted Critical
Publication of EP0177844B1 publication Critical patent/EP0177844B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1218—Devices for attaching printing elements or formes to supports for attaching flexible printing formes comprising printing plate tensioning devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F27/00—Devices for attaching printing elements or formes to supports
    • B41F27/12—Devices for attaching printing elements or formes to supports for attaching flexible printing formes
    • B41F27/1281—Devices for attaching printing elements or formes to supports for attaching flexible printing formes details of the printing plate ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F30/00—Devices for attaching coverings or make-ready devices; Guiding devices for coverings
    • B41F30/04—Devices for attaching coverings or make-ready devices; Guiding devices for coverings attaching to transfer cylinders

Definitions

  • the invention relates to a device for fastening the front and rear edge of a rubber blanket, each provided with a stiffening strip, to a rubber blanket cylinder of a rotary printing press, which has a pit which receives clamping means and is accessible from the outside through a narrow cylinder slot.
  • the stiffening strips run through the entire width of the rubber blanket.
  • the cylinder slot must be wide enough to allow insertion of the reinforcement strip of the rear blanket end with the front end of the blanket already inserted. So it must have at least a width that exceeds the thickness of the rubber blanket plus the thickness of a reinforcing bar.
  • a gap remains open between the two rubber blanket sections lying against the cylinder slot.
  • the invention has for its object to develop a device of the type mentioned in a simple manner by measures on existing parts so that a collapse of the interacting cylinders and thus short-term, strong changes in the pressure force between these cylinders can be avoided.
  • the offset printing unit for perfecting shown schematically in FIG. 1 comprises two blanket cylinders 1, 2 and two plate cylinders 3, 4. Between the blanket cylinders 1, 2, a web 5 is printed on both sides with one color each. Each of the two blanket cylinders 1, 2 has a pit 6, 7, the clamping means known per se takes, with which a blanket can be stretched.
  • the plate cylinders 3, 4 also have pits 8, 9 for tensioning the plates.
  • the blanket cylinder 1 has a narrow cylinder slot, designated overall by 10, which enables access to the pit 6 receiving the tensioning means.
  • the cylinder slot 10 has a wider central region 11 and a narrower edge region 12 and 13 at each end.
  • the cylinder slot 10 is shown enlarged in Figure 3 for reasons of better visibility.
  • a rubber blanket 14 is stretched onto the rubber blanket cylinder 1, the front and rear edges of which each carry a stiffening strip 15, 16.
  • the length of each stiffening strip 15, 16 is shorter than the width of the rubber blanket.
  • the distances from the end of the stiffening strips 15, 16 to the associated side edge 17 or 18 of the rubber blanket 14 are expediently chosen to be the same.
  • the stiffening strip of the leading edge can run continuously over the entire width of the rubber blanket and only the stiffening strip of the trailing edge can be shortened.
  • the leading edge is the edge of the rubber blanket that is the first to be inserted into the pit. Accordingly, the trailing edge is the edge that is only introduced into the pit after the leading edge has been introduced.
  • the rubber blanket 14 includes a textile braid layer 23 and an ink-transferring cover layer 24, it is expedient to have its end located in the open state within the cylinder slot 10 and the pit 6 sections 25, 26 only from the textile braid layer 23. This results in the possibility of further reducing the width of the cylinder slot 10.
  • the two edge regions 12, 13 of the cylinder slot 10 are dimensioned such that their width is approximately equal to twice the thickness of the rubber blanket 14. When the rubber blanket is stretched, the edge regions 12, 13 are therefore filled by the rubber blanket.
  • the central region 11 of the cylinder slot 10, is dimensioned so wide that, in addition to a position of the rubber blanket, the rear stiffening strip 16 can also be inserted into the cylinder pit. With a rubber blanket thickness of 1.9 mm and a thickness of the stiffening strip of approximately 1 mm, the cylinder slot in the edge regions 12, 13 can have a width of 3.8 to 4 mm, while the central region 11 is approximately 5 to 6 mm wide.
  • the cylinder slot can also be made 1 to 2 mm wider.
  • the end sections 25, 26 of which consist only of the textile braid layer 23 the aforementioned widths of the cylinder slot 10 can be reduced again by the measure of the thickness of the cover layer 24.
  • the length of the central region 11 corresponds to the length of the stiffening strip 16. Between the central region 11 and the edge regions 12, 13, as shown in FIG. 3, an oblique transition can be provided.
  • the blanket cylinder 2 can be designed in the same way as the blanket cylinder 1.
  • the force with which the two cylinders are positioned against one another becomes complete or, if the cylinders are provided with bearer rings, an essential one Transfer part over the rubber blankets. If the cylinder slots 10 of the two pits 6, 7 converge, the pressure force can continue to be transmitted in the edge areas 12, 13 of the cylinder slots 10 from the rubber blankets, since these at least largely fill the edge areas 12, 13. This prevents the cylinders from collapsing in the edge regions 12, 13 and the resulting vibration excitation. If the cylinder is rigid enough, this has an effect across the entire cylinder width. In addition, at the transition points between the two edge regions 12, 13 and the central region 11, a build-up of force takes place only gradually and not suddenly after passing through the cylinder slot 10. This phenomenon also counteracts vibration excitation.
  • the desired effect can be further improved in that the edge regions 12, 13 are offset relative to one another as a result of the oblique arrangement of the central longitudinal axis B-B of the cylinder slot 10 with respect to the central longitudinal axis A-A of the cylinder 1.
  • any narrow gap in the edge areas does not have an effect on both sides at the same time.
  • the wider central region of the cylinder slot 10 also runs slightly obliquely, so that this also results in a time offset of the build-up of force over the entire width of the cylinder.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Rotary Presses (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)

Abstract

Eine Einrichtung zur Befestigung der mit je einer Versteifungsleiste versehenen Vorder- und Hinterkante eines Gummituches an einem Gummituchzylinder einer Rotationsdruckmaschine weist im Gummituchzylinder eine spannmittelaufnehmende, von außen durch einen schmalen Zylinderschlitz zugängliche Grube auf. Um in einfacher Weise zu bewirken, daß ein Zusammenfallen des Gummituchzylinders mit einem benachbarten Zylinder beim Durchlauf der Grube vermieden wird, ist zumindest die Versteifungsleiste an der Hinterkante kürzer als die Breite des Gummituches bemessen. Dabei weist die Kante des Gummituches - ausgehend von den Enden der Versteifungsleiste - abgeschrägte Abschnitte auf. Gleichzeitig ist die Breite des Zylinderschlitzes in den die abgeschrägten Abschnitte aufnehmenden Randbereichen kleiner als in dem die Verstärkungsleiste aufnehmenden Mittelbereich bemessen.A device for fastening the front and rear edge of a rubber blanket, each provided with a stiffening strip, to a rubber blanket cylinder of a rotary printing press has in the rubber blanket cylinder a pit which accommodates tensioning means and is accessible from the outside through a narrow cylinder slot. In order to easily cause a collapse of the rubber blanket cylinder with an adjacent cylinder when passing through the pit, at least the stiffening strip at the rear edge is dimensioned shorter than the width of the rubber blanket. The edge of the rubber blanket - starting from the ends of the stiffening strip - has chamfered sections. At the same time, the width of the cylinder slot is smaller in the edge regions receiving the beveled sections than in the central region receiving the reinforcing strip.

Description

Die Erfindung betrifft eine Einrichtung zur Befestigung der mit je einer Versteifungsleiste versehenen Vorder-und Hinterkante eines Gummituchs an einem Gummituchzylinder einer Rotationsdruckmaschine, der eine Spannmittel aufnehmende, von außen durch einen schmalen Zylinderschlitz zugängliche Grube aufweist.The invention relates to a device for fastening the front and rear edge of a rubber blanket, each provided with a stiffening strip, to a rubber blanket cylinder of a rotary printing press, which has a pit which receives clamping means and is accessible from the outside through a narrow cylinder slot.

Bei einer derartigen aus der DE-AS 1 124 051 bekannten Einrichtung laufenden die Versteifungsleisten über die gesamte Breite des Gummituchs durch. Der Zylinderschlitz muß dabei breit genug sein, um ein Einführen der Verstärkungsleiste des hinteren Gummituchendes bei bereits eingeführtem vorderen Ende des Gummituchs zu ermöglichen. Er muß also mindestens eine Breite haben, die die Dicke des Gummituches plus der Dicke einer Verstärkungsleiste übersteigt. Bei aufgespanntem Gummituch bleibt infolgedessen zwischen den beiden am Zylinderschlitz anliegenden Gummituchabschnitten ein Spalt offen. Im Betrieb der Rotationsdruckmaschine fällt bei Anlauf des Zylinderschlitzes an den anderen Zylinder die Andruckkraft zwischen den beiden Zylindern schlagartig ab und steigt nach Durchlauf des Zylinderschlitzes wieder schlagartig an. Hierdurch werden den Druckvorgang negativ beeinflussende Schwingungen der Zylinder erregt. Dies gilt in besonderem Maße, wenn der andere Zylinder ebenfalls einen Zylinderschlitz aufweist. Dies ist beispielsweise bei zwei zusammenwirkenden Gummituchzylindern einer Offset-Schön-und Widerdruckmaschine der Fall.In such a device known from DE-AS 1 124 051, the stiffening strips run through the entire width of the rubber blanket. The cylinder slot must be wide enough to allow insertion of the reinforcement strip of the rear blanket end with the front end of the blanket already inserted. So it must have at least a width that exceeds the thickness of the rubber blanket plus the thickness of a reinforcing bar. As a result, when the rubber blanket is stretched, a gap remains open between the two rubber blanket sections lying against the cylinder slot. When the rotary printing press is operating, the contact pressure between the two cylinders drops abruptly when the cylinder slot starts up against the other cylinder and suddenly increases again after the cylinder slot has run through. This has a negative impact on the printing process transmit vibrations of the cylinders excited. This applies in particular if the other cylinder also has a cylinder slot. This is the case, for example, with two interacting blanket cylinders of an offset perfecting and counter-printing machine.

Der Erfindung liegt die Aufgabe zugrunde, eine Einrichtung der eingangs genannten Gattung in einfacher Weise durch Maßnahmen an vorhandenen Teilen so weiterzubilden, daß ein Zusammenfallen der zusammenwirkenden Zylinder und damit kurzzeitige, starke Änderungen der Andruckkraft zwischen diesen Zylindern vermieden werden.The invention has for its object to develop a device of the type mentioned in a simple manner by measures on existing parts so that a collapse of the interacting cylinders and thus short-term, strong changes in the pressure force between these cylinders can be avoided.

Diese Aufgabe wird durch Anwendung der im Kennzeichen des Anspruchs 1 angegebenen Maßnahmen gelöst.This object is achieved by applying the measures specified in the characterizing part of claim 1.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus den Unteransprüchen und der nachfolgenden Beschreibung eines Ausführungsbeispiels anhand der Zeichnung. Auf dieser zeigt:

  • Fig.1 eine schematische Darstellung der Zylinder eines Schön- und Widerdruckwerkes,
  • Fig.2 ein erfindungsgemäß ausgestaltetes Gummituch,
  • Fig.3 einen erfindungsgemäßen Gummituchzylinder in einer Ansicht und
  • Fig.4 einen Schnitt durch ein Gummituch.
Further features and advantages of the invention result from the subclaims and the following description of an exemplary embodiment with reference to the drawing. This shows:
  • 1 shows a schematic representation of the cylinders of a perfecting unit,
  • 2 shows a rubber blanket designed according to the invention,
  • 3 shows a blanket cylinder according to the invention in a view and
  • 4 shows a section through a rubber blanket.

Das in Fig.1 schematisch dargestellte Offsetdruckwerk für Schön- und Widerdruck umfaßt zwei Gummituchzylinder 1, 2 und zwei Plattenzylinder 3, 4. Zwischen den Gummtichzylindern 1, 2 wird eine Bahn 5 beidseitig mit je einer Farbe bedruckt. Jeder der beiden Gummituchzylinder 1, 2 weist eine Grube 6, 7 auf, die an sich bekannte Spannmittel aufnimmt, mit denen je ein Gummituch aufgespannt werden kann. Die Plattenzylinder 3, 4 weisen ebenfalls Gruben 8, 9 zur Spannung der Platten auf.The offset printing unit for perfecting shown schematically in FIG. 1 comprises two blanket cylinders 1, 2 and two plate cylinders 3, 4. Between the blanket cylinders 1, 2, a web 5 is printed on both sides with one color each. Each of the two blanket cylinders 1, 2 has a pit 6, 7, the clamping means known per se takes, with which a blanket can be stretched. The plate cylinders 3, 4 also have pits 8, 9 for tensioning the plates.

Wie Fig.3 erkennen läßt, weist der Gummituchzylinder 1 einen insgesamt mit 10 bezeichneten schmalen Zylinderschlitz auf, der den Zugang zu der die Spannmittel aufnehmenden Grube 6 ermöglicht. Der Zylinderschlitz 10 weist einen breiteren Mittelbereich 11 und an beiden Enden je einen schmäleren Randbereich 12 bzw. 13 auf. Der Zylinderschlitz 10 ist in Fig.3 aus Gründen der besseren Erkennbarkeit vergrößert dargestellt.As can be seen in FIG. 3, the blanket cylinder 1 has a narrow cylinder slot, designated overall by 10, which enables access to the pit 6 receiving the tensioning means. The cylinder slot 10 has a wider central region 11 and a narrower edge region 12 and 13 at each end. The cylinder slot 10 is shown enlarged in Figure 3 for reasons of better visibility.

Auf den Gummituchzylinder 1 wird ein Gummituch 14 aufgespannt, dessen Vorder- und Hinterkante je eine Versteifungsleiste 15, 16 trägt. Dabei ist die Länge jeder Versteifungsleiste 15, 16 kürzer als die Breite des Gummituches bemessen. Zweckmäßig sind die Abstände vom Ende der Versteifungsleisten 15, 16 zur zugeordneten Seitenkante 17 bzw. 18 des Gummituches 14 gleich groß gewählt. An die beiden Enden der Versteifungsleisten 15 bzw. 16 schließen sich je ein abgeschrägter Abschnitt 19, 20 bzw. 21, 22 des Gummitudhes 14 an, die zu den Seitenkanten 17, 18 überleiten. Alternativ kann jedoch auch die Versteifungsleiste der Vorderkante über die gesamte Breite des Gummituches durchlaufend und lediglich die Versteifungsleiste der Hinterkante verkürzt ausgebildet sein. Als Vorderkante ist dabei die Kante des Gummituchs zu verstehen, die als erste in die Grube eingeführt wird. Dementsprechend ist die Hinterkante die Kante, die erst nach dem Einbringen der Vorderkante in die Grube eingeführt wird.A rubber blanket 14 is stretched onto the rubber blanket cylinder 1, the front and rear edges of which each carry a stiffening strip 15, 16. The length of each stiffening strip 15, 16 is shorter than the width of the rubber blanket. The distances from the end of the stiffening strips 15, 16 to the associated side edge 17 or 18 of the rubber blanket 14 are expediently chosen to be the same. At both ends of the stiffening strips 15 and 16, there is a beveled section 19, 20 and 21, 22 of the rubber shaft 14, which lead to the side edges 17, 18. Alternatively, however, the stiffening strip of the leading edge can run continuously over the entire width of the rubber blanket and only the stiffening strip of the trailing edge can be shortened. The leading edge is the edge of the rubber blanket that is the first to be inserted into the pit. Accordingly, the trailing edge is the edge that is only introduced into the pit after the leading edge has been introduced.

Umfaßt das Gummituch 14 eine Textilgeflechtschicht 23 und eine farbübertragende Deckschicht 24, so bestehen zweckmäßig seine im aufgespannten Zustand innerhalb des Zylinderschlitzes 10 und der Grube 6 befindlichen Endabschnitte 25, 26 lediglich aus der Textilgeflechtschicht 23. Hierdurch ergibt sich die Möglichkeit, die Breite des Zylinderschlitzes 10 weiter zu vermindern.If the rubber blanket 14 includes a textile braid layer 23 and an ink-transferring cover layer 24, it is expedient to have its end located in the open state within the cylinder slot 10 and the pit 6 sections 25, 26 only from the textile braid layer 23. This results in the possibility of further reducing the width of the cylinder slot 10.

Die beiden Randbereiche 12, 13 des Zylinderschlitzes 10 sind so bemessen, daß ihre Breite etwa gleich der doppelten Dicke des Gummituches 14 bemessen ist. Bei aufgespanntem Gummituch sind daher die Randbereiche 12, 13 durch das Gummituch ausgefüllt. Der Mittelbereich 11 des Zylinderschlitzes 10 ist dagegen so breit bemessen, daß zusätzlich zu einer Lage des Gummituches noch die hintere Versteifungsleiste 16 in die Zylindergrube eingeführt werden kann. Bei einer Gummituchdicke von 1,9 mm und einer Dicke der Versteifungsleiste von etwa 1 mm kann der Zylinderschlitz in den Randbereichen 12, 13 eine Breite von 3,8 bis 4 mm haben, während der mittlere Bereich 11 etwa 5 bis 6 mm breit ist. Insbesondere bei steifen Gummitüchern und kleinen Übergangsradien zwischen dem Zylinderschlitz und der Zylindermantelfläche kann der Zylinderschlitz auch um 1 bis 2 mm breiter ausgeführt sein. Bei Verwendung eines Gummituches, dessen Endabschnitte 25, 26 lediglich aus der Textilgeflechtschicht 23 bestehen, können die vorgenannten Breiten des Zylinderschlitzes 10 nochmals um das Maß der Dicke der Deckschicht 24 vermindert werden. Die Länge des Mittelbereiches 11 entspricht der Länge der Versteifungsleiste 16. Zwischen dem Mittelbereich 11 und den Randbereichen 12, 13 kann, wie in Fig.3 dargestellt, ein schräger Übergang vorgesehen sein.The two edge regions 12, 13 of the cylinder slot 10 are dimensioned such that their width is approximately equal to twice the thickness of the rubber blanket 14. When the rubber blanket is stretched, the edge regions 12, 13 are therefore filled by the rubber blanket. The central region 11 of the cylinder slot 10, on the other hand, is dimensioned so wide that, in addition to a position of the rubber blanket, the rear stiffening strip 16 can also be inserted into the cylinder pit. With a rubber blanket thickness of 1.9 mm and a thickness of the stiffening strip of approximately 1 mm, the cylinder slot in the edge regions 12, 13 can have a width of 3.8 to 4 mm, while the central region 11 is approximately 5 to 6 mm wide. Especially with rigid blankets and small transition radii between the cylinder slot and the cylinder surface, the cylinder slot can also be made 1 to 2 mm wider. When using a rubber blanket, the end sections 25, 26 of which consist only of the textile braid layer 23, the aforementioned widths of the cylinder slot 10 can be reduced again by the measure of the thickness of the cover layer 24. The length of the central region 11 corresponds to the length of the stiffening strip 16. Between the central region 11 and the edge regions 12, 13, as shown in FIG. 3, an oblique transition can be provided.

Der Gummituchzylinder 2 kann in gleicher Weise ausgebildet sein wie der Gummituchzylinder 1.The blanket cylinder 2 can be designed in the same way as the blanket cylinder 1.

Rollen im Betrieb die Gummituchzylinder 1, 2 aufeinander ab, so wird die Kraft, mit der die beiden Zylinder gegeneinander angestellt sind, ganz oder, falls die Zylinder mit Schmitzringen versehen sind, doch zu einem wesentlichen Teil über die Gummitücher übertragen. Laufen die Zylinderschlitze 10 der beiden Gruben 6, 7 zusammen, so kann die Andruckkraft weiterhin in den Randbereichen 12, 13 der Zylinderschlitze 10 von den Gummitüchern übertragen werden, da diese die Randbereiche 12, 13 zumindest weitgehend ausfüllen. Dadurch werden in den Randbereichen 12, 13 ein Ineinanderfallen der Zylinder und eine hieraus resultierende Schwingungserregung vermieden. Dies wirkt sich bei entsprechender Zylindersteifigkeit über die gesamte Zylinderbreite aus. Hinzu kommt, daß an den Übergangsstellen zwischen den beiden Randbereichen 12, 13 und dem Mittelbereich 11 ein Kraftaufbau nach Durchlauf des Zylinderschlitzes 10 nur allmählich und nicht schlagartig stattfindet. Auch diese Erscheinung wirkt der Schwingungserregung entgegen.If the blanket cylinders 1, 2 roll on each other during operation, the force with which the two cylinders are positioned against one another becomes complete or, if the cylinders are provided with bearer rings, an essential one Transfer part over the rubber blankets. If the cylinder slots 10 of the two pits 6, 7 converge, the pressure force can continue to be transmitted in the edge areas 12, 13 of the cylinder slots 10 from the rubber blankets, since these at least largely fill the edge areas 12, 13. This prevents the cylinders from collapsing in the edge regions 12, 13 and the resulting vibration excitation. If the cylinder is rigid enough, this has an effect across the entire cylinder width. In addition, at the transition points between the two edge regions 12, 13 and the central region 11, a build-up of force takes place only gradually and not suddenly after passing through the cylinder slot 10. This phenomenon also counteracts vibration excitation.

Die angestrebte Wirkung kann weiterhin noch dadurch verbessert werden, daß die Randbereiche 12, 13 infolge schräger Anordnung der Mittellängsachse B-B des Zylinderschlitzes 10 gegenüber der Mittellängsachse A-A des Zylinders 1 gegeneinander versetzt sind. Hierdurch wirkt sich zum einen ein etwaiger schmaler Spalt in den Randbereichen nicht gleichzeitig auf beiden Seiten aus. Zum anderen verläuft auch der breitere Mittelbereich des Zylinderschlitzes 10 leicht schräg, so daß auch hierdurch ein zeitlicher Versatz des Kraftaufbaues über die gesamte Breite des Zylinders erfolgt.The desired effect can be further improved in that the edge regions 12, 13 are offset relative to one another as a result of the oblique arrangement of the central longitudinal axis B-B of the cylinder slot 10 with respect to the central longitudinal axis A-A of the cylinder 1. As a result, any narrow gap in the edge areas does not have an effect on both sides at the same time. On the other hand, the wider central region of the cylinder slot 10 also runs slightly obliquely, so that this also results in a time offset of the build-up of force over the entire width of the cylinder.

Claims (4)

1. Einrichtung zur Befestigung der mit je einer Versteifungsleiste versehenen Vorder- und Hinterkante eines Gummituches an einem Gummituchzylinder einer Rotationsdruckmaschine, der eine Spannmittel aufnehmende, von außen durch einen schmalen Zylinderschlitz zugängliche Grube aufweist,
dadurch gekennzeichnet, daß
zumindest die Versteifungsleiste (15) an der Hinterkante kürzer als die Breite des Gummituches (14) bemessen ist, die Kante des Gummituches (14) - ausgehend von den Enden der Versteifungsleiste (15) - abgeschrägte Abschnitte (19, 20) aufweist, und
die Breite des Zylinderschlitzes (10) in den die abgeschrägten Abschnitte aufnehmenden Randbereichen (12, 13) kleiner als in dem die Verstärkungsleiste (15) aufnehmenden Mittelbereich (11) bemessen ist.1. Device for fastening the front and rear edge of a rubber blanket, each provided with a stiffening strip, to a rubber blanket cylinder of a rotary printing press, which has a pit which receives clamping means and is accessible from the outside through a narrow cylinder slot,
characterized in that
at least the stiffening strip (15) at the rear edge is shorter than the width of the rubber blanket (14), the edge of the rubber blanket (14) - starting from the ends of the stiffening strip (15) - has beveled sections (19, 20), and
the width of the cylinder slot (10) in the edge regions (12, 13) receiving the beveled sections is smaller than in the central region (11) receiving the reinforcing strip (15). 2. Einrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Breite der Randbereiche (12, 13) des Zylinderschlitzes (10) etwa gleich der doppelten Dicke des Gummituches (14) bemessen ist.2. Device according to claim 1, characterized in that the width of the edge regions (12, 13) of the cylinder slot (10) is approximately equal to twice the thickness of the rubber blanket (14). 3. Einrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Zylinderschlitz (10) eine unter einem kleinen Winkel schräg zur Mittellängsachse (A-A) des Gummituchzylinders (1) verlaufende Mittellängslinie (B-B) aufweist.3. Device according to one of the preceding claims, characterized in that the cylinder slot (10) at a small angle obliquely to the central longitudinal axis (A-A) of the blanket cylinder (1) has a central longitudinal line (B-B). 4. Einrichtung nach einem der vorhergehenden Ansprüche mit einem Gummituch, das eine Textilgeflechtschicht
und eine farbübertragende Deckschicht umfaßt, dadurch gekennzeichnet, daß die in aufgespanntem Zustand des Gummituches (14) innerhalb des Zylinderschlitzes (10) und der Grube (6) befindlichen Abschnitte (25, 26) lediglich aus der Textilgeflechtschicht (23) bestehen.4. Device according to one of the preceding claims with a rubber blanket having a textile braid layer
and comprises an ink-transferring cover layer, characterized in that the sections (25, 26) located inside the cylinder slot (10) and the pit (6) in the stretched-out state of the rubber blanket (14) consist only of the textile braid layer (23).
EP85112199A 1984-10-11 1985-09-26 Device for attaching a rubber sheet to a rubber cylinder Expired EP0177844B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843437309 DE3437309A1 (en) 1984-10-11 1984-10-11 DEVICE FOR FASTENING A RUBBER TUBE ON A RUBBER TUBE CYLINDER
DE3437309 1984-10-11

Publications (3)

Publication Number Publication Date
EP0177844A2 true EP0177844A2 (en) 1986-04-16
EP0177844A3 EP0177844A3 (en) 1987-08-19
EP0177844B1 EP0177844B1 (en) 1989-09-13

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Application Number Title Priority Date Filing Date
EP85112199A Expired EP0177844B1 (en) 1984-10-11 1985-09-26 Device for attaching a rubber sheet to a rubber cylinder

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US (1) US4648318A (en)
EP (1) EP0177844B1 (en)
JP (1) JPS6195944A (en)
DE (2) DE3437309A1 (en)

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US5979322A (en) * 1996-05-07 1999-11-09 Demoore; Howard Warren Environmentally safe, ink repellent, anti-marking flexible jacket covering having alignment stripes, centering marks and pre-fabricated reinforcement strips for attachment onto transfer cylinders in a printing press
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JP3457932B2 (en) 2000-07-31 2003-10-20 三菱重工業株式会社 Cylindrical blanket and blanket cylinder and printing press
US7367931B2 (en) * 2000-10-30 2008-05-06 Pactiv Corporation Laser cutoff stacker assembly
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DE10222225A1 (en) * 2002-05-16 2003-12-04 Heidelberger Druckmasch Ag Cylinder lift and method for mounting a cylinder lift in a printing press
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Also Published As

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US4648318A (en) 1987-03-10
EP0177844A3 (en) 1987-08-19
DE3437309A1 (en) 1986-04-17
JPH0584217B2 (en) 1993-12-01
DE3437309C2 (en) 1988-05-19
EP0177844B1 (en) 1989-09-13
JPS6195944A (en) 1986-05-14
DE3572945D1 (en) 1989-10-19

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