EP0446668B1 - Cleaning device for a printing machine - Google Patents

Cleaning device for a printing machine Download PDF

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Publication number
EP0446668B1
EP0446668B1 EP91102399A EP91102399A EP0446668B1 EP 0446668 B1 EP0446668 B1 EP 0446668B1 EP 91102399 A EP91102399 A EP 91102399A EP 91102399 A EP91102399 A EP 91102399A EP 0446668 B1 EP0446668 B1 EP 0446668B1
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EP
European Patent Office
Prior art keywords
membrane
cleaning
web
region
cleaning cloth
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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EP91102399A
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German (de)
French (fr)
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EP0446668A1 (en
Inventor
Gerhard Loos
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Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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Publication of EP0446668A1 publication Critical patent/EP0446668A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F35/00—Cleaning arrangements or devices
    • B41F35/06—Cleaning arrangements or devices for offset cylinders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00—Cleaning
    • B41P2235/10—Cleaning characterised by the methods or devices
    • B41P2235/20—Wiping devices
    • B41P2235/24—Wiping devices using rolls of cleaning cloth
    • B41P2235/246—Pressing the cleaning cloth against the cylinder

Definitions

  • the invention relates to a cleaning device for a printing press for cleaning a rotating outer surface of a roller or a cylinder, for example for cleaning a rubber blanket of a blanket cylinder of an offset printing machine, by means of a cleaning cloth web with web edges running perpendicular to the surface lines of the outer surface, a membrane being provided in the latter one-sided application by means of a pressurized fluid presses a section of the cleaning cloth web against the outer surface.
  • Such a cleaning device is known, for example, from FIG. 6 of patent application EP-A2 0 299 193 and the associated description.
  • a pressure chamber is provided for one-sided loading of the membrane by means of a pressurized fluid, in which a chamber wall is formed by the membrane.
  • a cleaning cloth web runs between the outer surface of a rubber blanket stretched on a blanket cylinder of an offset printing press and a surface of the membrane facing the outer surface.
  • the width of the cleaning cloth web is chosen to be somewhat larger than the useful width that can be achieved with the offset printing machine. This measure creates a first prerequisite for the outer surface being able to be cleaned in an area which is somewhat wider than the useful width, so that cleaning across the entire useful width is actually possible.
  • the cleaning cloth web must also be pressed against the lateral surface over a width such that the pressed-on area of the cleaning cloth web is somewhat wider than the useful width.
  • the membrane In order to ensure a certain minimum value of a pressing force of the cleaning cloth web on the outer surface over the entire useful width, the membrane must be bulged by means of the pressurized fluid in such a way that the membrane also exerts a pressing force on the edges of the cleaning cloth web which has a certain minimum value .
  • this can only be achieved with sufficient certainty that the extension of the membrane in the direction transverse to the cleaning cloth web extends beyond the width of the cleaning cloth web.
  • the membrane presses against the outer surface with a certain force. The membrane may be damaged at its end areas.
  • the invention is based on the object of enabling an inexpensive and low-wear operation of a generic cleaning device.
  • the one-sided means of a pressurized fluid membrane does not come into contact with the jacket surface at any point.
  • the raised surface area of the membrane is dimensioned and arranged so that it extends in a direction transverse to the cleaning cloth web between the web edges of the cleaning cloth web and has a slightly smaller width than the cleaning cloth web.
  • Surface areas of the membrane which are offset by the step and lie outside the width of the raised surface area then do not come into contact with the cleaning cloth web, let alone with the outer surface. This prevents damage that can occur due to friction between the membrane and the rotating surface.
  • An embodiment according to the invention is characterized in that the membrane on both sides and beyond the step has at least essentially the same wall thickness.
  • a necessary installation space for the cleaning device, which extends in the transverse direction to the cleaning cloth web, is therefore not significantly larger than the width of the cleaning cloth web, so that space-saving installation is possible.
  • the favorable installation conditions are due to the deformation behavior of the membrane in its end areas, which allow greater curvatures thanks to the smaller wall thickness.
  • the membranes used for the cleaning devices mentioned at the outset usually have an elongated shape, the longitudinal extent being dependent on the width of use already mentioned. If a corresponding pressure chamber is now closed by means of such a membrane and a fluid under pressure is introduced into the pressure chamber, this results in known membranes (as for example in Fig. 6 of patent application EP-A2 0 299 193) in successive imaginary cuts in the longitudinal direction vertical planes, especially in the vicinity of the narrow sides of the membrane, have relatively large differences in the contour of the membrane surface facing the cleaning cloth web. When using such membranes in a generic cleaning device, this results in a difficult to predict of several factors (such as pressure of the fluid, even under the conditions of the same geometry and the same installation conditions).
  • the step delimiting the raised first surface area has first and second body edges, the first body edges running parallel to the web edges of the cleaning cloth web and delimiting a central area of maximum longitudinal extent of the raised first surface area and the second body edges delimit adjacent edge areas of the raised first surface area on both sides of the central area of the raised first surface area and extend such that the longitudinal extent in the edge areas decreases with increasing distance from the central area.
  • the measure proposed in this way for shaping the edge regions adjoining the central region of the raised first surface region has a favorable effect in this regard on keeping the membrane from deforming under the pressure of the Fluids out, as hereby the above-mentioned differences in the contour of the membrane surface facing the cleaning cloth web in successive imaginary cuts in planes perpendicular to the longitudinal extension of the membrane within the area of the membrane forming the raised first surface area in the direction of the first laterally delimiting the raised first surface area
  • avoid body edges It can thus be achieved that the section of the cleaning cloth web pressed against the lateral surface tapers at most insignificantly as seen towards the web edges of the cleaning cloth web.
  • An optimal course of the second body edges can be determined, for example, by tests, wherein different outlines of edge regions of the raised first surface region can be achieved, for example, by correspondingly removing material forming the membrane. The removal can take place, for example, by grinding.
  • a lateral surface 1 for example a blanket cylinder of an offset printing machine
  • a generic cleaning device 2 on the other hand.
  • the latter is also only shown: a frame part 3 of a pair of frames, a cleaning cloth web 4, a coil 5 accommodating the cleaning cloth web 4 with a coil core 6, which is carried by a frame part 3 of the pair of frames, a membrane 7, which is between them itself and a tensioning rail 8 forms a pressure chamber 9, a profiled cross member 10 carried by a frame part 3, in which two opposite edges of the membrane 7 are clamped between respective sealing surfaces of the cross member 10 on the one hand and the tensioning rail 9 on the other hand, and a tensioning screw 11 for sealingly clamping the edges of the membrane 7 mentioned.
  • the membrane 7, the tensioning rail 8 and the cross member 10 each have an elongated shape, of which a cross section can be seen in the illustration shown.
  • the membrane 7 is also narrow Sides such as shown in FIG. 4 sealingly connected to a respective end face of the clamping rail 8.
  • a respective end of the membrane 7 is clamped between a corresponding end face of the tensioning rail 8 and a pressure plate 11.
  • the cleaning cloth web 4 is passed between the outer surface 1 and a surface of the membrane 7 facing it.
  • the membrane 7 is pressurized on one side by means of a pressurized fluid and presses a section of the cleaning cloth web 4 against the outer surface 1.
  • the pressurized fluid is introduced into the pressure chamber 9 through a pressure line 12 and a screw connection 13 screwed into an inlet bore of the tensioning rail 8.
  • a membrane 7 according to the invention made of rubber-elastic material is shown detached from the cleaning device described above in an appropriate position in relation to the cleaning cloth web 4 to the cleaning cloth web 4 shown in broken lines. In this illustration, the cleaning cloth web 4 runs above the membrane 7.
  • the surface of the membrane 7 facing the cleaning cloth web 4 has a raised first surface region, designated overall by 16, which can be contacted with the latter, at least in the event of a bulging of the membrane 7 in the direction of the cleaning cloth web 4, and second surface regions 18.1 and 18.2, which are formed by means of a recessed step 17 are offset from the first surface area 16.
  • the sublime first Surface area 16 extends between first body edges 19.1 and 19.2 formed by means of step 17 and parallel to web edges 14 and 15 over a length which is somewhat greater than the useful width mentioned at the outset.
  • the web edges 14 and 15 of the cleaning cloth web 4 protrude by a respective distance 20 beyond the stated length of the raised first surface area 16.
  • the membrane 7 is pressed against the outer surface 1 with a corresponding bulge under the pressure of a fluid introduced into the pressure chamber 9 to a cleaning width 4 defined by the first body edges 19.1 and 19.2.
  • the second surface areas 18.1 and 18.2 which are offset by the step 17 do not come into contact with the lateral surface 1.
  • they have the effect that a curvature of the raised first surface area 16 in the longitudinal direction of the elongated membrane 7 resulting from the bulging of the membrane 7 under the pressure of the fluid is also reduced to extremely small values in the vicinity of the first body edges 19.1 and 19.2. This results in a curvature of the membrane 7 caused by the pressure of the fluid in its longitudinal direction mainly in the areas of the membrane 7 forming the stepped surface areas 18.1 and 18.2.
  • a respective first body edge 19.1 and 19.2 formed by the step 17 represents a respective lateral boundary of a central region 16.1 of the raised first surface region 16, while a respective end of a respective first body edge 19.1 and 19.2 a second body edge 19.1 ', 19.1 ⁇ and 19.2', 19.2 ⁇ connects.
  • the second body edges 19.1 'and 19.2' form a lateral boundary of a first edge region 16.2 and the second body edges 19.1 ⁇ and 19.2 ⁇ a lateral boundary of a second edge area 16.3 of the raised first surface area 16, the first edge area 16.2 and the second edge area 16.3 each adjoining the middle area 16.1.
  • a respective edge area 16.2 and 16.3 is increasingly narrower than the cleaning cloth web 4 with increasing distance from the central area 16.1.
  • the second body edges 19.1 ', 19.1 ⁇ , 19.2', 19.2 ⁇ do not need to be straight as shown in the drawing.
  • An angle ⁇ enclosed between a first body edge 19.1 or 19.2 and a second body edge 19.1 ', 19.1 ⁇ or 19.2', 19.2 ⁇ can also be adapted to the respective requirements. In extreme cases it can be provided that the raised first surface area has a step 17 all around.
  • 4 and 5 are, as mentioned, partial sections perpendicular to a tangential plane on the lateral surface 1, an operating state being shown in each case by the cleaning cloth web 4 by means of the membrane 7 (FIG. 4) and 7 '(FIG. 5) to the Shell surface 1 is pressed.
  • 4 provided membrane 7 made of rubber-elastic material, the stage 17 is formed while maintaining a substantially uniform wall thickness of the membrane 7 in an area of the membrane 7 facing the cleaning cloth 4, while in such a membrane 7 'according to FIG stepped surface areas 18.1, 18.2 (18.2 not shown here) forming areas of the membrane 7 'have a smaller wall thickness by the height of the step 17 have as a region of the membrane 7 'forming the raised first surface region 16'.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Abstract

A cleaning device for a printing press for cleaning a rotating outer cylindrical surface of a roller or cylinder by a cleaning-cloth web having a given width and edges extending perpendicularly to generating lines of the outer cylindrical surface includes a diaphragm subjectible to pressure at one side thereof by a pressurized fluid for pressing a section of the cleaning-cloth web against the outer cylindrical surface, the diaphragm being formed with a raised first surface region matching the given width of the cleaning-cloth web and being engageable with the cleaning-cloth web, the diaphragm having a surface with second surface regions facing towards the cleaning-cloth web, the second surface regions being offset by a step with respect to the first surface region.

Description

Die Erfindung betrifft eine Reinigungseinrichtung für eine Druckmaschine zum Reinigen einer rotierenden Mantelfläche einer Walze oder eines Zylinders, beispielsweise zum Reinigen eines Gummituchs eines Gummituchzylinders einer Offsetdruckmaschine, mittels einer Reinigungstuchbahn mit zu Mantellinien der Mantelfläche senkrecht verlaufenden Bahnrändern, wobei eine Membran vorgesehen ist, welche bei deren einseitiger Beaufschlagung mittels eines unter Druck stehenden Fluids einen Abschnitt der Reinigungstuchbahn an die Mantelfläche andrückt.The invention relates to a cleaning device for a printing press for cleaning a rotating outer surface of a roller or a cylinder, for example for cleaning a rubber blanket of a blanket cylinder of an offset printing machine, by means of a cleaning cloth web with web edges running perpendicular to the surface lines of the outer surface, a membrane being provided in the latter one-sided application by means of a pressurized fluid presses a section of the cleaning cloth web against the outer surface.

Eine derartige Reinigungseinrichtung ist beispielsweise bekannt aus Fig. 6 der Patentanmeldung EP-A2 0 299 193 und der zugehörigen Beschreibung. Zur einseitigen Beaufschlagung der Membran mittels eines unter Druck stehenden Fluids ist hierbei eine Druckkammer vorgesehen, bei welcher eine Kammerwand von der Membran gebildet ist. Eine Reinigungstuchbahn verläuft zwischen der Mantelfläche eines auf einem Gummituchzylinder einer Offsetdruckmaschine aufgespannten Gummituchs und einer der Mantelfläche zugewandten Oberfläche der Membran. Bei solchen Reinigungseinrichtungen wird die Breite der Reinigungstuchbahn etwas größer gewählt als die mit der Offsetdruckmaschine erzielbare Nutzenbreite. Diese Maßnahme schafft eine erste Voraussetzung dafür, daß die Mantelfläche in einem Bereich gereinigt werden kann, der etwas breiter ist als die Nutzenbreite, so daß auch tatsächlich eine Reinigung über die gesammte Nutzenbreite möglich ist. Als eine weitere Voraussetzung dafür muß aber auch die Reinigungstuchbahn über eine derartige Breite an die Mantelfläche angedrückt werden, daß der angedrückte Bereich der Reinigungstuchbahn etwas breiter ist als die Nutzenbreite.Such a cleaning device is known, for example, from FIG. 6 of patent application EP-A2 0 299 193 and the associated description. A pressure chamber is provided for one-sided loading of the membrane by means of a pressurized fluid, in which a chamber wall is formed by the membrane. A cleaning cloth web runs between the outer surface of a rubber blanket stretched on a blanket cylinder of an offset printing press and a surface of the membrane facing the outer surface. In the case of such cleaning devices, the width of the cleaning cloth web is chosen to be somewhat larger than the useful width that can be achieved with the offset printing machine. This measure creates a first prerequisite for the outer surface being able to be cleaned in an area which is somewhat wider than the useful width, so that cleaning across the entire useful width is actually possible. As a further prerequisite for this, however, the cleaning cloth web must also be pressed against the lateral surface over a width such that the pressed-on area of the cleaning cloth web is somewhat wider than the useful width.

Um nun über die gesammte Nutzenbreite einen bestimmten Mindestwert einer Andrückkraft der Reinigungstuchbahn an die Mantelfläche zu gewährleisten, muß die Membran mittels des unter Druck stehenden Fluids derart aufgewölbt werden, daß die Membran auch auf die Ränder der Reinigungstuchbahn eine Andrückkraft ausübt, die einen gewissen Mindestwert aufweist. Mit hinreichender Sicherheit läßt sich dies jedoch nur dadurch erreichen, daß die Erstreckung der Membran in der quer zur Reinigungstuchbahn liegenden Richtung über die Breite der Reinigungstuchbahn hinausgeht. Dabei drückt jedoch in je einem außerhalb der Reinigungstuchbahn liegenden Endbereich der Membran diese mit einer gewissen Kraft gegen die Mantelfläche. Hierbei kann die Membran an ihren Endbereichen beschädigt werden.In order to ensure a certain minimum value of a pressing force of the cleaning cloth web on the outer surface over the entire useful width, the membrane must be bulged by means of the pressurized fluid in such a way that the membrane also exerts a pressing force on the edges of the cleaning cloth web which has a certain minimum value . However, this can only be achieved with sufficient certainty that the extension of the membrane in the direction transverse to the cleaning cloth web extends beyond the width of the cleaning cloth web. However, in each case in an end region of the membrane lying outside the cleaning cloth web, the membrane presses against the outer surface with a certain force. The membrane may be damaged at its end areas.

Dem könnte zwar durch eine entsprechende ebenfalls merkliche Verbreiterung der Reinigungstuchbahn abgeholfen werden. Erreicht würde damit jedoch nur eine Verlagerung der Kosten, die ein regelmäßiger Ersatz der Membran mit sich bringen, auf die Mehrkosten einer breiteren Reinigungstuchbahn.This could be remedied by a correspondingly noticeable widening of the cleaning cloth web. However, this would only result in a shift of the costs that a regular replacement of the membrane entails to the additional costs of a wider cleaning cloth web.

Der Erfindung liegt nun die Aufgabe zugrunde, einen kostengünstigen und verschleißarmen Betrieb einer gattungsgemäßen Reinigungseinrichtung zu ermöglichen.The invention is based on the object of enabling an inexpensive and low-wear operation of a generic cleaning device.

Diese Aufgabe wird gelöst mit einer Reinigungseinrichtung gemäß Anspruch 1.This object is achieved with a cleaning device according to claim 1.

Mit einer dementsprechenden Ausgestaltung der Membran wird erreicht, daß die einseitig mittels eines unter Druck stehenden Fluids beaufschlagte Membran an keiner Stelle der Mantelfläche mit dieser in Berührung kommt.With a corresponding design of the membrane it is achieved that the one-sided means of a pressurized fluid membrane does not come into contact with the jacket surface at any point.

Hierzu wird der erhabene Oberflächenbereich der Membran so bemessen und angeordnet, daß er sich in einer Richtung quer zur Reinigungstuchbahn zwischen den Bahnrändern der Reinigungstuchbahn erstreckt und eine geringfügig kleinere Breite aufweist als die Reinigungstuchbahn. Außerhalb der Breite des erhabenen Oberflächenbereichs liegende mittels der Stufe abgesetzte Oberflächenbereiche der Membran kommen sodann weder mit der Reinigungstuchbahn geschweige denn mit der Mantelfläche in Berührung. Damit sind Beschädigungen ausgeschlossen, die durch Reibung zwischen der Membran und der rotierenden Mantelfläche auftreten können.For this purpose, the raised surface area of the membrane is dimensioned and arranged so that it extends in a direction transverse to the cleaning cloth web between the web edges of the cleaning cloth web and has a slightly smaller width than the cleaning cloth web. Surface areas of the membrane which are offset by the step and lie outside the width of the raised surface area then do not come into contact with the cleaning cloth web, let alone with the outer surface. This prevents damage that can occur due to friction between the membrane and the rotating surface.

Eine erfindungsgemäße Ausführungsform zeichnet sich dadurch aus, daß die Membran diesseits und jenseits der Stufe zumindest im wesentlichen gleiche Wandstärke besitzt.An embodiment according to the invention is characterized in that the membrane on both sides and beyond the step has at least essentially the same wall thickness.

Der gewünschte Erfolg ist hiernach bereits garantiert durch eine überraschend einfache und geringfügige Änderung der Geometrie einer Membran, wie sie beispielsweise aus der o.g. Druckschrift EP-A2 0 299 193 bekannt ist. Es ist dabei lediglich dafür zu sorgen, daß bei der einseitigen Beaufschlagung der Membran mittels des unter Druck stehenden Fluids eine derartige Aufwölbung der Membran erreicht wird, daß der erhabene Oberflächenbereich in seiner vollen Erstreckung in Richtung quer zur Reinigungstuchbahn die Reinigungstuchbahn an die Mantelfläche andrückt. Das heißt, es müssen lediglich der Druck des Fluids und die Erstreckung der außerhalb der Reinigungstuchbahn liegenden abgesetzten Oberflächenbereiche der Membran aufeinander abgestimmt werden.According to this, the desired success is already guaranteed by a surprisingly simple and slight change in the geometry of a membrane, as is known, for example, from the above-mentioned document EP-A2 0 299 193. It is only necessary to ensure that when the membrane is pressurized on one side by means of the fluid under pressure, such a bulging of the membrane is achieved that the raised surface area in its full extent in the direction transverse to the cleaning cloth web presses the cleaning cloth web onto the outer surface. That means that only the pressure of the fluid and the extent of the separated surface areas of the membrane lying outside the cleaning cloth web have to be coordinated.

Diese Abstimmung gelingt schon bei relativ kurzer Erstreckung der außerhalb der Reinigungstuchbahn liegenden abgesetzten Oberflächenbereiche der Membran mit einer erfindungsgemäßen Ausführungsform, die sich dadurch auszeichnet, daß die abgesetzten zweiten Oberflächenbereiche bildende Bereiche einer Membran eine um die Höhe der Stufe geringere Wandstärke aufweisen als ein den erhabenden ersten Oberflächenbereich bildender Bereich der Membran.This coordination is possible even with a relatively short extension of the offset surface areas of the membrane lying outside the cleaning cloth web with an embodiment according to the invention, which is characterized in that the offset areas of a membrane forming second surface areas have a wall thickness that is lower by the height of the step than that of the first one Area of the membrane forming the surface area.

Ein sich in Querrichtung zur Reinigungstuchbahn erstreckender notwendiger Einbauraum für die Reinigungseinrichtung ist hierbei also auch nicht wesentlich größer als die Breite der Reinigungstuchbahn, so daß ein platzsparender Einbau möglich ist. Hierbei gehen die günstigen Einbauverhältnisse auf das Verformungsverhalten der Membran in deren Endbereichen zurück, welche dank der geringeren Wandstärke stärkere Krümmungen zulassen.A necessary installation space for the cleaning device, which extends in the transverse direction to the cleaning cloth web, is therefore not significantly larger than the width of the cleaning cloth web, so that space-saving installation is possible. The favorable installation conditions are due to the deformation behavior of the membrane in its end areas, which allow greater curvatures thanks to the smaller wall thickness.

Die für die eingangs genannten Reinigungseinrichtungen verwendeten Membranen haben üblicherweise eine langgestreckte Form, wobei die Längserstreckung von der bereits erwähnten Nutzenbreite abhängig ist. Wird nun eine entsprechende Druckkammer mittels einer derartigen Membran verschlossen und ein unter Druck stehendes Fluid in die Druckkammer eingeleitet, so ergeben sich bei bekannten Membranen (wie beispielsweise in Fig. 6 der Patentanmeldung EP-A2 0 299 193) in aufeinanderfolgenden gedachten Schnitten in zur Längserstreckung senkrechten Ebenen insbesondere in der Nähe der schmalen Seiten der Membran relativ große Unterschiede in der Kontur der der Reinigungstuchbahn zugewandten Membranoberfläche. Bei Verwendung solcher Membranen in einer gattungsgemäßen Reinigungseinrichtung ergibt sich damit selbst unter den Voraussetzungen gleicher Geometrie und gleicher Einbauverhältnisse ein schwer vorhersehbarer von mehreren Faktoren (wie beispielsweise Druck des Fluids, Elastizität des Membranwerkstoffs, Wandstärke der Membran) abhängiger Umriß des gegen die Mantelfläche gedrückten Abschnitts der Reinigungstuchbahn. Im allgemeinen kann davon ausgegangen werden, daß sich dieser Abschnitt jeweils in Richtung auf eine schmale Seite der Membran hin gesehen verjüngt. Dies hat aber zur Folge, daß entlang der zu reinigenden Mantelfläche unterschiedliche Längen der Reinigungstuchbahn am Reinigungsvorgang beteiligt sind und demzufolge auch ein entsprechend ungleichmäßiges Reinigungsergebnis erzielt wird.The membranes used for the cleaning devices mentioned at the outset usually have an elongated shape, the longitudinal extent being dependent on the width of use already mentioned. If a corresponding pressure chamber is now closed by means of such a membrane and a fluid under pressure is introduced into the pressure chamber, this results in known membranes (as for example in Fig. 6 of patent application EP-A2 0 299 193) in successive imaginary cuts in the longitudinal direction vertical planes, especially in the vicinity of the narrow sides of the membrane, have relatively large differences in the contour of the membrane surface facing the cleaning cloth web. When using such membranes in a generic cleaning device, this results in a difficult to predict of several factors (such as pressure of the fluid, even under the conditions of the same geometry and the same installation conditions). Elasticity of the membrane material, wall thickness of the membrane) dependent outline of the section of the cleaning cloth web pressed against the outer surface. In general, it can be assumed that this section tapers in the direction of a narrow side of the membrane. However, this has the consequence that different lengths of the cleaning cloth web are involved in the cleaning process along the lateral surface to be cleaned, and consequently a correspondingly uneven cleaning result is achieved.

Dem kann in Weiterbildung des Erfindungsgegenstandes dadurch begegnet werden, daß die den erhabenen ersten Oberflächenbereich abgrenzende Stufe erste und zweite Körperkanten aufweist, wobei die ersten Körperkanten parallel zu den Bahnrändern der Reinigungstuchbahn verlaufen und einen mittleren Bereich maximaler Längserstreckung des erhabenen ersten Oberflächenbereichs begrenzen und die zweiten Körperkanten beiderseits des mittleren Bereichs des erhabenen ersten Oberflächenbereichs anschließende Randbereiche des erhabenen ersten Oberflächenbereichs begrenzen und derart verlaufen, daß die Längserstreckung in den Randbereichen mit Zunehmendem Abstand vom mittleren Bereich abnimmt.This can be countered in a further development of the subject of the invention in that the step delimiting the raised first surface area has first and second body edges, the first body edges running parallel to the web edges of the cleaning cloth web and delimiting a central area of maximum longitudinal extent of the raised first surface area and the second body edges delimit adjacent edge areas of the raised first surface area on both sides of the central area of the raised first surface area and extend such that the longitudinal extent in the edge areas decreases with increasing distance from the central area.

Die damit vorgeschlagene Maßnahme zur Formgebung der an den mittleren Bereich des erhabenen ersten Oberflächenbereichs anschließenden Randbereiche wirkt sich insofern günstig auf das Verformungshalten der Membran unter dem Druck des Fluids aus, als sich hiermit die oben genannten Unterschiede in der Kontur der der Reinigungstuchbahn zugewandten Membranoberfläche in aufeinanderfolgenden gedachten Schnitten in zur Längserstreckung der Membran senkrechtenen Ebenen innerhalb des den erhabenen ersten Oberflächenbereich bildenden Bereichs der Membran in Richtung auf die den erhabenen ersten Oberflächenbereich seitlich begrenzenden ersten Körperkanten hin gesehen weitgehend vermeiden lassen. Somit ist erreichbar, daß sich der gegen die Mantelfläche gedrückte Abschnitt der Reinigungstuchbahn zu den Bahnrändern der Reinigungstuchbahn hin gesehen höchstenfalls noch unwesentlich verjüngt. Ein optimaler Verlauf der zweiten Körperkanten kann beispielsweise durch Versuche ermittelt werden, wobei verschiedene Umrisse von Randbereichen des erhabenen ersten Oberflächenbereichs beispielsweise durch entsprechendes Abtragen von die Membran bildendem Material erzielbar sind. Das Abtragen kann beispielsweise durch Schleifen erfolgen.The measure proposed in this way for shaping the edge regions adjoining the central region of the raised first surface region has a favorable effect in this regard on keeping the membrane from deforming under the pressure of the Fluids out, as hereby the above-mentioned differences in the contour of the membrane surface facing the cleaning cloth web in successive imaginary cuts in planes perpendicular to the longitudinal extension of the membrane within the area of the membrane forming the raised first surface area in the direction of the first laterally delimiting the raised first surface area As far as possible, avoid body edges. It can thus be achieved that the section of the cleaning cloth web pressed against the lateral surface tapers at most insignificantly as seen towards the web edges of the cleaning cloth web. An optimal course of the second body edges can be determined, for example, by tests, wherein different outlines of edge regions of the raised first surface region can be achieved, for example, by correspondingly removing material forming the membrane. The removal can take place, for example, by grinding.

Die Erfindung ist nachfolgend anhand von Zeichnungen von Ausführungsbeispielen näher erläutert.The invention is explained in more detail below with reference to drawings of exemplary embodiments.

Hierin zeigt

Fig. 1
eine vereinfachte Darstellung einer gattungsgemäßen Reinigungseinrichtung, bei welcher die Reinigungstuchbahn mittels der unter dem Druck eines Fluids stehenden Membran gegen die zu reinigende Mantelfläche gedrückt ist, dargestellt in einem Schnitt senkrecht zu Mantellinien der Mantelfläche,
Fig. 2
einen Teil einer Einrichtung gemäß Fig. 1, dargestellt als Schnitt in einer Ebene parallel zur Schnittebene in Fig. 1 mit einer nicht unter dem Druck eines Fluids stehenden Membran,
Fig. 3
eine perspektivische Darstellung einer einer Reinigungstuchbahn zugeordneten erfindungsgemäß ausgebildeten Membran,
Fig. 4 und 5
Ausführungsbeispiele einer erfindungsgemäßen Membran, dargestellt anhand jeweiliger Teilschnitte senkrecht zu einer Tangentialebene an die Mantelfläche und in einem Zustand, in dem die Reinigungstuchbahn mittels der Membran an die Mantelfläche angedrückt ist.
Here shows
Fig. 1
a simplified representation of a generic cleaning device, in which the cleaning cloth web is pressed against the outer surface to be cleaned by means of the membrane under the pressure of a fluid, shown in a section perpendicular to outer lines of the outer surface,
Fig. 2
1, shown as a section in a plane parallel to the section plane in FIG. 1 a membrane not under the pressure of a fluid,
Fig. 3
2 shows a perspective illustration of a membrane designed according to the invention and assigned to a cleaning cloth web,
4 and 5
Exemplary embodiments of a membrane according to the invention, illustrated by means of respective partial sections perpendicular to a tangential plane on the outer surface and in a state in which the cleaning cloth web is pressed against the outer surface by means of the membrane.

Die Fig. 1 dient lediglich zur Veranschaulichung der gegenseitigen Zuordnung einer Mantelfläche 1 (beispielsweise eines Gummituchzylinders einer Offsetdruckmaschine) einerseits und einer gattungsgemäßen Reinigungseinrichtung 2 andererseits. Der Einfachheit halber ist von letzterer auch nur dargestellt: Ein Rahmenteil 3 eines Rahmenpaares, eine Reinigungstuchbahn 4, eine die Reinigungstuchbahn 4 aufnehmende Spule 5 mit einem Spulenkern 6, der von je einem Rahmenteil 3 des Rahmenpaares getragen ist, eine Membran 7, welche zwischen sich selbst und einer Spannschiene 8 eine Druckkammer 9 ausbildet, eine von je einem Rahmenteil 3 getragene profilierte Traverse 10, in welche zwei einander gegenüberliegende Ränder der Membran 7 zwischen jeweiligen Dichtflächen von einerseits Traverse 10 und andererseits Spannschiene 9 dichtend eingespannt sind, sowie eine Spannschraube 11 zum dichtenden Einspannen der genannten Ränder der Membran 7. Hierbei haben die Membran 7, die Spannschiene 8 und die Traverse 10 jeweils eine langgestreckte Form, von der in der gezeigten Darstellung jeweils ein Querschnitt erkennbar ist. Zur Ausbildung der Druckkammer 9 ist die Membran 7 ferner an ihren schmalen Seiten wie beispielsweise aus Fig. 4 ersichtlich dichtend mit einer jeweiligen Stirnfläche der Spannschiene 8 verbunden. Hierzu ist ein jeweiliges Ende der Membran 7 zwischen eine entsprechende Stirnfläche der Spannschiene 8 und eine Andrückplatte 11 eingespannt. Die Reinigungstuchbahn 4 ist zwischen der Mantelfläche 1 und einer dieser zugewandten Oberfläche der Membran 7 hindurchgeführt.1 only serves to illustrate the mutual assignment of a lateral surface 1 (for example a blanket cylinder of an offset printing machine) on the one hand and a generic cleaning device 2 on the other hand. For the sake of simplicity, the latter is also only shown: a frame part 3 of a pair of frames, a cleaning cloth web 4, a coil 5 accommodating the cleaning cloth web 4 with a coil core 6, which is carried by a frame part 3 of the pair of frames, a membrane 7, which is between them itself and a tensioning rail 8 forms a pressure chamber 9, a profiled cross member 10 carried by a frame part 3, in which two opposite edges of the membrane 7 are clamped between respective sealing surfaces of the cross member 10 on the one hand and the tensioning rail 9 on the other hand, and a tensioning screw 11 for sealingly clamping the edges of the membrane 7 mentioned. The membrane 7, the tensioning rail 8 and the cross member 10 each have an elongated shape, of which a cross section can be seen in the illustration shown. To form the pressure chamber 9, the membrane 7 is also narrow Sides such as shown in FIG. 4 sealingly connected to a respective end face of the clamping rail 8. For this purpose, a respective end of the membrane 7 is clamped between a corresponding end face of the tensioning rail 8 and a pressure plate 11. The cleaning cloth web 4 is passed between the outer surface 1 and a surface of the membrane 7 facing it.

In Fig. 1 ist ferner ein Betriebszustand dargestellt, in dem die Membran 7 einseitig mittels eines unter Druck stehenden Fluids beaufschlagt ist und einen Abschnitt der Reinigungstuchbahn 4 an die Mantelfläche 1 andrückt. Gemäß Fig. 2 wird hierzu das unter Druck stehende Fluid durch eine Druckleitung 12 und eine daran anschließende in eine Einlaßbohrung der Spannschiene 8 eingeschraubte Verschraubung 13 in die Druckkammer 9 eingeleitet.1 also shows an operating state in which the membrane 7 is pressurized on one side by means of a pressurized fluid and presses a section of the cleaning cloth web 4 against the outer surface 1. According to FIG. 2, the pressurized fluid is introduced into the pressure chamber 9 through a pressure line 12 and a screw connection 13 screwed into an inlet bore of the tensioning rail 8.

In Fig. 3 ist eine erfindungsgemäße Membran 7 aus gummielastischem Material losgelöst von der vorab beschriebenen Reinigungseinrichtung in einer in bezug auf die Reinigungstuchbahn 4 lagegerechten Zuordnung zu der strichpunktiert wiedergegebenen Reinigungstuchbahn 4 dargestellt. Die Reinigungstuchbahn 4 verläuft in dieser Darstellung oberhalb der Membran 7.In Fig. 3, a membrane 7 according to the invention made of rubber-elastic material is shown detached from the cleaning device described above in an appropriate position in relation to the cleaning cloth web 4 to the cleaning cloth web 4 shown in broken lines. In this illustration, the cleaning cloth web 4 runs above the membrane 7.

Die zu Mantellinien der hier nicht dargestellten Mantelfläche 1 senkrecht verlaufenden Bahnränder der Reinigungstuchbahn 4 sind mit 14 bzw. 15 bezeichnet. Die der Reinigungstuchbahn 4 zugewandte Oberfläche der Membran 7 weist einen insgesamt mit 16 bezeichneten erhabenen ersten Oberflächenbereich auf, der zumindest im Falle einer Aufwölbung der Membran 7 in Richtung auf die Reinigungstuchbahn 4 mit letzterer kontaktierbar ist, sowie zweite Oberflächenbereiche 18.1 und 18.2, die mittels einer zurückspringenden Stufe 17 gegenüber dem ersten Oberflächenbereich 16 abgesetzt sind. Der erhabene erste Oberflächenbereich 16 erstreckt sich zwischen mittels der Stufe 17 gebildeten zu den Bahnränderen 14 und 15 parallelen ersten Körperkanten 19.1 und 19.2 über eine Länge, die etwas größer ist als die eingangs erwähnte Nutzenbreite. Die Bahnränder 14 bzw. 15 der Reinigungstuchbahn 4 ragen um einen jeweiligen Abstand 20 über die genannte Länge des erhabenen ersten Oberflächenbereichs 16 hinaus.The web edges of the cleaning cloth web 4, which run perpendicular to the surface lines of the outer surface 1 (not shown here), are denoted by 14 and 15, respectively. The surface of the membrane 7 facing the cleaning cloth web 4 has a raised first surface region, designated overall by 16, which can be contacted with the latter, at least in the event of a bulging of the membrane 7 in the direction of the cleaning cloth web 4, and second surface regions 18.1 and 18.2, which are formed by means of a recessed step 17 are offset from the first surface area 16. The sublime first Surface area 16 extends between first body edges 19.1 and 19.2 formed by means of step 17 and parallel to web edges 14 and 15 over a length which is somewhat greater than the useful width mentioned at the outset. The web edges 14 and 15 of the cleaning cloth web 4 protrude by a respective distance 20 beyond the stated length of the raised first surface area 16.

Damit ist nun erreichbar, daß die Membran 7 bei entsprechender Aufwölbung unter dem Druck eines in die Druckkammer 9 eingeleiteten Fluids die Reinigungstuchbahn 4 auf eine durch die ersten Körperkanten 19.1 und 19.2 festgelegte Breite an die Mantelfläche 1 angedrückt wird. Die mittels der Stufe 17 abgesetzten zweiten Oberflächenbereiche 18.1 und 18.2 kommen dabei nicht mit der Mantelfläche 1 in Berührung. Sie bewirken andererseits, daß sich eine durch Aufwölbung der Membran 7 unter dem Druck des Fluids ergebende Krümmung des erhabenen ersten Oberflächenbereichs 16 in Längsrichtung der langgestreckten Membran 7 auch in der Umgebung der ersten Körperkanten 19.1 und 19.2 auf äußerst kleine Werte reduziert. Damit erfolgt eine durch den Druck des Fluids hervorgerufene Krümmung der Membran 7 in deren Längsrichtung hauptsächlich in den die abgesetzten Oberflächenbereiche 18.1 und 18.2 bildenden Bereichen der Membran 7.It can now be achieved that the membrane 7 is pressed against the outer surface 1 with a corresponding bulge under the pressure of a fluid introduced into the pressure chamber 9 to a cleaning width 4 defined by the first body edges 19.1 and 19.2. The second surface areas 18.1 and 18.2 which are offset by the step 17 do not come into contact with the lateral surface 1. On the other hand, they have the effect that a curvature of the raised first surface area 16 in the longitudinal direction of the elongated membrane 7 resulting from the bulging of the membrane 7 under the pressure of the fluid is also reduced to extremely small values in the vicinity of the first body edges 19.1 and 19.2. This results in a curvature of the membrane 7 caused by the pressure of the fluid in its longitudinal direction mainly in the areas of the membrane 7 forming the stepped surface areas 18.1 and 18.2.

Bei der in Fig. 3 dargestellten Membran 7 stellt eine jeweilige mittels der Stufe 17 gebildete erste Körperkante 19.1 und 19.2 eine jeweilige seitliche Begrenzung eines mittleren Bereichs 16.1 des erhabenen ersten Oberflächenbereichs 16 dar, während sich an ein jeweiliges Ende einer jeweiligen ersten Körperkante 19.1 und 19.2 jeweils eine zweite Körperkante 19.1′, 19.1˝ und 19.2′, 19.2˝ anschließt. Dabei bilden die zweiten Körperkanten 19.1′ und 19.2′ eine seitliche Begrenzung eines ersten Randbereichs 16.2 und die zweiten Körperkanten 19.1˝ und 19.2˝ eine seitliche Begrenzung eines zweiten Randbereichs 16.3 des erhabenen ersterf Oberflächenbereichs 16, wobei sich der erste Randbereich 16.2 und der zweite Randbereich 16.3 jeweils an den mittleren Bereich 16.1 anschließt. Für die zweiten Körperkanten 19.1′, 19.1˝, 19.2′, 19.2˝ ist hierbei ein derartiger Verlauf vorgesehen, daß ein jeweiliger Randbereich 16.2 und 16.3 mit zunehmendem Abstand vom mittleren Bereich 16.1 zunehmend schmäler ist als die Reinigungstuchbahn 4. Wie weiter oben beschrieben, wird mit dieser Ausgestaltung erreicht, daß sich der gegen die Mantelfläche 1 gedrückte Abschnitt der Reinigungstuchbahn 4 zu den Bahnränderen 14, 15 der Reinigungstuchbahn 4 hin höchstenfalls unwesentlich verjüngt. Die zweiten Körperkanten 19.1′, 19.1˝, 19.2′, 19.2˝ brauchen hierbei nicht wie in der Zeichnung dargestellt geradlinig zu verlaufen. Auch ein zwischen einer ersten Körperkante 19.1 bzw. 19.2 und einer zweiten Körperkante 19.1′, 19.1˝ bzw. 19.2′, 19.2˝ eingeschlossener Winkel α kann den jeweiligen Erfordernissen angepaßt werden. In Extremfällen kann vorgesehen werden, daß der erhabene erste Oberflächenbereich ringsum eine Stufe 17 aufweist.In the membrane 7 shown in FIG. 3, a respective first body edge 19.1 and 19.2 formed by the step 17 represents a respective lateral boundary of a central region 16.1 of the raised first surface region 16, while a respective end of a respective first body edge 19.1 and 19.2 a second body edge 19.1 ', 19.1˝ and 19.2', 19.2˝ connects. The second body edges 19.1 'and 19.2' form a lateral boundary of a first edge region 16.2 and the second body edges 19.1˝ and 19.2˝ a lateral boundary of a second edge area 16.3 of the raised first surface area 16, the first edge area 16.2 and the second edge area 16.3 each adjoining the middle area 16.1. For the second body edges 19.1 ', 19.1', 19.2 ', 19.2', such a course is provided that a respective edge area 16.2 and 16.3 is increasingly narrower than the cleaning cloth web 4 with increasing distance from the central area 16.1. As described above, it becomes achieved with this configuration that the section of the cleaning cloth web 4 pressed against the lateral surface 1 tapers at most insignificantly towards the web edges 14, 15 of the cleaning cloth web 4. The second body edges 19.1 ', 19.1˝, 19.2', 19.2˝ do not need to be straight as shown in the drawing. An angle α enclosed between a first body edge 19.1 or 19.2 and a second body edge 19.1 ', 19.1˝ or 19.2', 19.2˝ can also be adapted to the respective requirements. In extreme cases it can be provided that the raised first surface area has a step 17 all around.

Die Fig. 4 und 5 sind wie erwähnt Teilschnitte senkrecht zu einer Tangentialebene an die Mantelfläche 1, wobei jeweils ein Betriebszustand dargestellt ist, indem die Reinigungstuchbahn 4 mittels der Membran 7 (Fig. 4) bzw. 7′ (Fig.5) an die Mantelfläche 1 angedrückt ist. Bei der gemäß Fig. 4 vorgesehenen Membran 7 aus gummielastischem Material ist die Stufe 17 unter Beibehaltung einer im wesentlichen gleichmäßigen Wandstärke der Membran 7 in einem der Reinigungstuchbahn 4 zugewandten Bereich der Membran 7 ausgebildet, während bei einer derartigen Membran 7′ gemäß Fig. 5 die abgesetzten Oberflächenbereiche 18.1, 18.2 (18.2 hier nicht dargestellt) bildende Bereiche der Membran 7′ eine um die Höhe der Stufe 17 geringere Wandstärke aufweisen als ein den erhabenen ersten Oberflächenbereich 16 bildender Bereich der Membran 7′. Die leichtere Verformbarkeit der abgesetzten Obeflächenbereiche 18.1 und 18.2 bei einer Ausführung gemäß Fig. 5 gegenüber einer Ausführung gemäß Fig. 4 führt dazu, daß bei gleichen Umrissen des erhabenen ersten Oberflächenbereichs 16 und gleicher Breite der Reinigungstuchbahn 4 eine geringere Erstreckung der Membran 7′ quer zur Reinigungstuchbahn 4 erforderlich ist.4 and 5 are, as mentioned, partial sections perpendicular to a tangential plane on the lateral surface 1, an operating state being shown in each case by the cleaning cloth web 4 by means of the membrane 7 (FIG. 4) and 7 '(FIG. 5) to the Shell surface 1 is pressed. 4 provided membrane 7 made of rubber-elastic material, the stage 17 is formed while maintaining a substantially uniform wall thickness of the membrane 7 in an area of the membrane 7 facing the cleaning cloth 4, while in such a membrane 7 'according to FIG stepped surface areas 18.1, 18.2 (18.2 not shown here) forming areas of the membrane 7 'have a smaller wall thickness by the height of the step 17 have as a region of the membrane 7 'forming the raised first surface region 16'. The easier deformability of the offset surface areas 18.1 and 18.2 in an embodiment according to FIG. 5 compared to an embodiment according to FIG. 4 leads to the fact that with the same contours of the raised first surface area 16 and the same width of the cleaning cloth web 4, a smaller extension of the membrane 7 'transversely to Cleaning cloth web 4 is required.

BEZUGSZEICHENLISTEREFERENCE SIGN LIST

11
MantelflächeLateral surface
22nd
ReinigungseinrichtungCleaning facility
33rd
RahmenteilFrame part
44th
ReinigungstuchbahnCleaning cloth web
55
SpuleKitchen sink
66
SpulenkernCoil core
7, 7′7, 7 ′
Membranmembrane
88th
SpannschieneTensioning rail
99
DruckkammerPressure chamber
1010th
Traversetraverse
1111
AndruckplattePressure plate
1212th
DruckleitungPressure line
1313
VerschraubungScrew connection
1414
Bahnrand der Reinigungstuchbahn 4Edge of the cleaning cloth web 4
1515
Bahnrand der Reinigungstuchbahn 4Edge of the cleaning cloth web 4
1616
erster Oberflächenbereichfirst surface area
16.116.1
mittlerer Bereich des ersten Oberflächenbereichs 16middle area of the first surface area 16
16.2, 16.316.2, 16.3
Randbereich des ersten Oberflächenbereichs 16Edge area of the first surface area 16
1717th
Stufestep
18.1, 18.218.1, 18.2
zweite Oberflächenbereichesecond surface areas
19.1, 19.219.1, 19.2
erste Körperkanten des ersten Oberflächenbereichs 16first body edges of the first surface area 16
19.1′, 19.1˝, 19.2′, 19.2˝19.1 ′, 19.1˝, 19.2 ′, 19.2˝
zweite Körperkanten des ersten Oberflächenbereichs 16second body edges of the first surface area 16
2020th
Abstanddistance

Claims (4)

  1. Cleaning device for a printing machine for cleaning a rotating, cylindrical outer surface (1), for example for cleaning a rubber blanket of a blanket cylinder, having
    - a membrane (7, 7′) with a membrane surface which faces the outer surface (1) and is curved towards the outer surface (1) with compression loading of the membrane (7, 7′),
    - a web of cleaning cloth (4) extending between the outer surface (1) and the membrane (7, 7′) with web edges (14, 15) oriented perpendicular to the direction of generating lines of the outer surface (1),
    - a section of the web of cleaning cloth (4) being pressed against the outer surface (1) by means of a pressing-on region of the membrane surface which is curved under the compression loading of the membrane,
    characterized by
    - an elevated first surface region (16) which comprises the pressing-on region and second surface regions (18.1, 18.2) of the membrane surface facing the outer surface (1), said surface regions being offset relative to said first surface region by means of a set-back step (17)
    and
    - such a position and such a longitudinal extent of the first surface region (16) along the generating lines that the web edges (14, 15) of the web of cleaning cloth (4) extend outside the first surface region (16).
  2. Cleaning device according to Claim 1, characterized in that the membrane (7) on one side and on the other side of the step (17) has at least substantially the same wall thickness.
  3. Cleaning device according to Claim 1, characterized in that the membrane (7′) in the offset second surface region (18.1, 18.2) has a wall thickness which is less by the height of the step (17) than in the elevated first surface region (16).
  4. Cleaning device according to Claim 1, characterized in that
    - the step (17) bounding the first surface region (16) has first body edges (19.1, 19.2) and second body edges (19.1′, 19.2′; 19.1˝, 19.2˝),
    - the first body edges (19.1, 19.2) extend parallel to the web edges (14, 15) and bound a central region (16.1) of a maximum longitudinal extent of the first surface region (16) and
    - the second body edges (19.1′, 19.2′; 19.1˝, 19.2˝) on both sides of the central region (16.1) bound adjacent edge regions (16.2, 16.3) and extend in such a way that the longitudinal extent in the edge regions (16.2, 16.3) decreases as the distance from the central region (16.1) increases.
EP91102399A 1990-03-15 1991-02-20 Cleaning device for a printing machine Expired - Lifetime EP0446668B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4008159 1990-03-15
DE4008159A DE4008159A1 (en) 1990-03-15 1990-03-15 CLEANING DEVICE FOR A PRINTING MACHINE

Publications (2)

Publication Number Publication Date
EP0446668A1 EP0446668A1 (en) 1991-09-18
EP0446668B1 true EP0446668B1 (en) 1994-07-06

Family

ID=6402184

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91102399A Expired - Lifetime EP0446668B1 (en) 1990-03-15 1991-02-20 Cleaning device for a printing machine

Country Status (5)

Country Link
US (1) US5123354A (en)
EP (1) EP0446668B1 (en)
JP (1) JP2525515B2 (en)
AT (1) ATE108135T1 (en)
DE (1) DE4008159A1 (en)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4142422A1 (en) * 1991-12-20 1993-06-24 Baldwin Gegenheimer Gmbh DEVICE FOR CLEANING A ROTARY PRINTING MACHINE
IT1264177B1 (en) * 1993-07-27 1996-09-23 Elettra Srl PRESSER FOR CLEANING THE RUBBER-COATED CYLINDER OF PRINTING MACHINES.
DE19515721C2 (en) * 1995-05-03 2000-02-03 Heidelberger Druckmasch Ag Device for cleaning cylinder surfaces in rotary printing machines
US5568768A (en) * 1995-05-04 1996-10-29 Presstek, Inc. Cleaning apparatus for offset plates
US5584242A (en) * 1995-05-04 1996-12-17 Presstek, Inc. Clamp assembly for lithographic plates
DE19516422C2 (en) * 1995-05-04 1998-12-24 Bernd Dr Brenner Printing machine with a cleaning device provided for a cylinder
DE19605957A1 (en) * 1996-02-17 1997-08-21 Heidelberger Druckmasch Ag Device for cleaning the outer surface of cylinders in rotary printing machines
US6116160A (en) * 1998-03-13 2000-09-12 Iris Graphics, Inc. Printer drum
US5967044A (en) * 1998-05-04 1999-10-19 Marquip, Inc. Quick change ink supply for printer
DE10000549A1 (en) * 2000-01-08 2001-07-12 Baldwin Grafotec Gmbh Wash bars for printing press cylinders
DE10000555A1 (en) * 2000-01-08 2001-07-12 Baldwin Grafotec Gmbh Wash bars for printing press cylinders
CN1628031A (en) * 2002-05-08 2005-06-15 鲍德温格拉菲科系统公司 Bladder with constant contact region for cleaning blanket cylinder
SE545301C2 (en) * 2021-09-14 2023-06-20 Primeblade Sweden Ab A combination of an ink reservoir and doctor blade assembly and a rotatable cylinder for a printing press

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3788219A (en) * 1972-04-04 1974-01-29 Dick Co Ab Blade for scraping liquids from a relatively moving surface
US4344361A (en) * 1979-04-19 1982-08-17 Baldwin-Gegenheimer Corporation Automatic blanket cylinder cleaner
DE3309557A1 (en) * 1983-03-17 1984-09-27 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach RAKEL FOR A ROLLER WASHING DEVICE
DD227927A1 (en) * 1984-11-02 1985-10-02 Polygraph Leipzig DEVICE FOR CLEANING A CYLINDER OF A PRINTING MACHINE
DD228215B1 (en) * 1984-11-08 1989-12-06 Polygraph Leipzig CLAMPING DEVICE FOR PRESSURE AGGREGATORS, IN PARTICULAR WASHING MACHINES FOR PRINTING MACHINES
JPS6416657A (en) * 1987-07-10 1989-01-20 Baldwin Nippon Kk Pressure pad in cylinder cleaner for press
JPH01122438A (en) * 1987-11-06 1989-05-15 B J Trading Kk Cylinder washing apparatus
DE8809032U1 (en) * 1988-07-14 1988-08-25 Baldwin-Gegenheimer GmbH, 8900 Augsburg Device for cleaning a cylinder of a printing press
DE3909114C2 (en) * 1989-03-20 1994-06-01 Heidelberger Druckmasch Ag Actuator acted upon by pressure medium for placing a washcloth on a washing device of a printing press

Also Published As

Publication number Publication date
US5123354A (en) 1992-06-23
DE4008159A1 (en) 1991-09-19
JP2525515B2 (en) 1996-08-21
ATE108135T1 (en) 1994-07-15
JPH04220346A (en) 1992-08-11
EP0446668A1 (en) 1991-09-18
DE4008159C2 (en) 1992-05-27

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