EP0606581B1 - Device for automatically cleaning blanket cylinders in an offset printing machine - Google Patents

Device for automatically cleaning blanket cylinders in an offset printing machine Download PDF

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Publication number
EP0606581B1
EP0606581B1 EP93119525A EP93119525A EP0606581B1 EP 0606581 B1 EP0606581 B1 EP 0606581B1 EP 93119525 A EP93119525 A EP 93119525A EP 93119525 A EP93119525 A EP 93119525A EP 0606581 B1 EP0606581 B1 EP 0606581B1
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EP
European Patent Office
Prior art keywords
rubber
brush roller
web
blanket cylinder
blanket
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
Application number
EP93119525A
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German (de)
French (fr)
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EP0606581A1 (en
Inventor
Barry Mark Jackson
Dave Charles Gibson
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Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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Publication date
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Publication of EP0606581A1 publication Critical patent/EP0606581A1/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41FPRINTING MACHINES OR PRESSES
    • B41F35/00Cleaning arrangements or devices
    • B41F35/06Cleaning arrangements or devices for offset cylinders
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41PINDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2235/00Cleaning
    • B41P2235/10Cleaning characterised by the methods or devices
    • B41P2235/20Wiping devices
    • B41P2235/23Brushes

Definitions

  • the present invention relates generally to a cleaning device for printing units and in particular to a device for automatically cleaning blanket cylinders in a lithographic offset printing machine.
  • blanket cylinders In offset printing machines, the function of the blanket cylinders is to transfer the print images from the printing plates to a material web. Significantly, blanket cylinders carry blankets with an attached rubber layer through which the printed images are transferred.
  • one or more printing plates are wound around the outer surface of a plate cylinder which rotates in contact with the blanket cylinder.
  • a web of material runs between two blanket cylinders, which are mounted in such a way that one blanket cylinder serves as a printing cylinder for the other, resulting in the simultaneous printing on both sides of the web of material.
  • the present invention provides a device for cleaning a blanket cylinder in a web offset printing press, which comprises the following features: at least one brush roller for removing foreign objects from the blanket cylinder; means for positioning the brush roller against the blanket cylinder and the web; and means for cleaning the brush roller from the foreign matter removed from the blanket cylinder.
  • the present invention can also be used to clean the impression cylinder as well as the blanket cylinder and blanket.
  • the present invention also provides a device for spraying the brush roller with a blanket washing solution.
  • the brush roller, the blanket cylinder and the web form a closed area and thus create a barrier which prevents blanket washing solution and foreign matter from getting into the adjacent inking and dampening units. This helps to maintain the print quality of the printed products during the printing process.
  • FIG. 1 shows a device 10 for the automatic cleaning of blanket cylinders with an upper washing unit 12 and a lower washing unit 14.
  • the upper washing unit 12 has a rotating brush roller 16, which is simultaneously with an upper blanket cylinder 18, on which a blanket 20 is axially attached, and comes into contact with a web 22.
  • the lower washing unit 14 has the same rotating brush roller 24, which simultaneously comes into contact with a lower blanket cylinder 26, on which a blanket 28 is axially attached, and with the web 22.
  • the cleaning device 10 is preferably integrated into a printing unit of the printing press.
  • the upper and lower washing units 12 and 14 are in a parking position. In this position, namely in the OFF mode (not shown), the upper washing unit 12 is next to the upper blanket cylinder 18 and above the web 22, but is not in contact with the upper blanket cylinder or web, and the lower washing unit 14 is adjacent to the lower blanket cylinder 26 and below the web 22, but is not in contact with the lower blanket cylinder or web.
  • the cleaning device 10 When the cleaning device 10 is in the OFF mode, the machine can run at normal speed with the web 22 moving between the upper and lower washing units 12 and 14 and a normal one Allows printing. If the upper and lower blankets 20 and 28 are to be cleaned, the cleaning device 10 can be moved to its starting position at any machine speed up to 914 m (3000 feet) per minute.
  • the cleaning device 10 is moved into its setting position by pneumatic cylinders. These pneumatic cylinders move the cleaning device 10 on a straight path at an angle of 24 1/2 ° to the web 22 towards the blanket cylinders 18 and 26 until the brush roller 16 is in contact with the blanket cylinder 18 and the web 22 and the brush roller 24 is in contact with the blanket cylinder 26 and the web 22. In both the set and set positions, the cleaning device 10 serves as protection, thereby preventing an operator's hand or arm from getting into the gap between the upper and lower blanket cylinders 18 and 26.
  • the brush roller 16 rotates in the same direction, but at a lower driving speed than the blanket cylinder 18, so that a respective point corresponding to an opposite point near the contact point of the brush roller 16 and the upper blanket cylinder 18 moves in the opposite direction .
  • the brush roller 16 can brush over the surface of the rubber blanket 20 and clean it of foreign bodies and other dirt.
  • the brush roller 16 is supplied with a washing solution containing a solvent, for example water. With the brush roller, the foreign bodies are then released from the pores of the rubber blanket 20 and through the gap between the upper and lower blanket cylinders 18 and 26 running web 22 removed. Any residues remaining after the brush roller 16 comes into contact with the rubber blanket 20 on the brush roller, consisting of blanket washing solution and foreign bodies, are removed from the brush roller 16 by a stripper roller 30 and conveyed onto the web 22.
  • a washing solution containing a solvent for example water.
  • the brush roller 16, the blanket cylinder 18 and the web 22 form an upper closed triangular area.
  • the web 22 coming into contact with the brush roller 16 further cleans the brush roller and serves as a barrier, thereby preventing a mist and / or other foreign matter forming from a blanket washing solution from coming into contact with the inking unit and dampening unit. All parts of the triangle are in motion, creating a continuous, self-cleaning surface.
  • the blanket wash solution remains in the triangular region until it is drained through the gap between the upper and lower blanket cylinders 18 and 26.
  • a stripper roller 30, the surface speed of which is lower than that of the brush roller 16, is rotated in contact with the brush roller 16.
  • the stripper roller 30 throws foreign objects from the brush roller 16 directly onto the web 22.
  • the stripper roller 30 is mounted within the upper triangular region; as a result, no foreign bodies can collect on the stripper roller 30 and it is also self-cleaning.
  • the stripper roller 30 may have a smooth surface, but preferably it has grooves extending axially along its length.
  • the lower washing unit 14 is operated in a similar manner to the upper washing unit 12.
  • the lower one Blanket cylinder 26 and brush roller 24 contacting web 22 simultaneously rotate in the same direction, but at a lower driving speed than blanket cylinder 26, so that a respective point corresponding to an opposite point near the contact point of brush roller 24 and lower blanket cylinder 26 is in opposite directions Moving direction.
  • the brush roller 24 can brush over the surface of the rubber blanket 28 and clean it of foreign bodies and other dirt.
  • the brush roller 24, the blanket cylinder 26 and the web 22 form a lower closed triangular area.
  • the web 22 coming into contact with the brush roller 24 further cleans the brush roller and serves as a barrier, thereby preventing a mist and / or other foreign matter formed from a blanket washing solution from coming into contact with the inking unit and dampening unit. All parts of the triangle are in motion, creating a continuous, self-cleaning surface.
  • the blanket wash solution remains in the triangular region until it is drained through the gap between the upper and lower blanket cylinders 18 and 26.
  • a stripper roller 32 the surface speed of which is lower than that of the brush roller 24, is rotated in contact with the brush roller 24.
  • the stripper roller 32 throws foreign bodies from the brush roller 24 directly onto the web 22.
  • the stripper roller 32 is mounted within the lower triangular region; as a result, no foreign bodies can collect on the stripper roller 32 and it is also self-cleaning.
  • the stripping roller 32 can be a have a smooth surface, but preferably it has grooves extending axially along its length.
  • a drip container 34 is provided under the lower washing unit 14, in which the dirty water can collect.
  • the upper wash unit 12 includes a spray shield 36 which can be pivoted about the brush roller 16 away from the web 22 when the cleaning device is actuated.
  • the spray shield 36 is pivoted about a slide bearing bush 38 of the brush roller 16 and moved forwards and backwards by a joint 40 when the upper washing unit 12 slides into its setting position.
  • the shield 36 is prevented from contacting the web 22 and the brush roller 16 is allowed to form the third leg of the triangle.
  • the shield 36 in its retracted position also functions as a drip tray. Excess blanket washing solution that could drip from the brush roller 16 is collected by the shield 36 and thus prevents drops from falling directly onto the web 22. Drain holes 42 are provided at each end of the shield 36 so that excess solution can flow into the drip container 34.
  • the brush rollers are driven by an air motor 44 via a gear train 46.
  • the air flow is throttled on the outlet side of the air motor 44.
  • a throttled exhaust line maintains the engine at a constant RPM at over 30% of the machine speed at a given air pressure.
  • the motor 44 is on one Cross connection attached so that it is protected from solvents and foreign bodies.
  • the blanket wash solution is fed to the brush roll 16 through a spray bar 48 having a plurality of side openings through which the wash solution is sprayed, as shown in FIG. 2. These openings are created diametrically so that a uniform flow through each opening is ensured.
  • a sealing screen is provided in order to divert the blanket washing solution to selected openings so that it is only applied to the part of the brush roller 16 that comes into contact with the web.
  • This sealing screen consists of sleeves 50 which fit over the spray bar 48 and are rotated in such a way that they close the openings.
  • the sleeves 50 are preferably 11.4 cm (4.5 inches) long, which is half the width of a sheet, and are attached along the length of the spray bar 48.
  • Joints 52 are provided which move the sleeves 50 into position.
  • the hinges 52 connect the sleeves 50 to sleeves 54.
  • the sleeves 54 are placed around a cross connection 56 and also moved into position to open or close the respective sealing screen.
  • the position of the cuffs 54 determines the opening and / or closing during web retraction since any regulation that would require closure would be off the web.
  • Rubber blanket washing solution overflowing from the spray bar 48 is collected in a groove 58 provided under the spray bar 48, as shown in FIG. 2.
  • This blanket washing solution is passed through a drain pipe 60 into the drip container 34 and fed to a reprocessing system, as shown in FIG. 1.
  • the lower wash unit 14 has a similar blanket wash solution delivery system with a spray bar 62 as shown in FIG. 1. However, instead of a pivotable spray shield, a drip container 34 is used for excess washing solution which may drip from the brush roller 24.
  • the drip container 34 has a wire mesh 64 which is located at a distance from the bottom of the drip container and is provided with disposable filter paper 66 which completely covers the wire mesh.
  • the solids are thus filtered out of the blanket washing solution, which is now contaminated with paint, and in this way clogging of the sewage pipes is prevented.
  • the blanket wash solution is then pumped into a waste water tank for further distillation.
  • the application of the present invention is also intended for various other arrangements, for example for cleaning the printing cylinders and the blanket cylinders and blankets.
  • the present invention is therefore not intended to be limited to cleaning the blanket-to-blanket printing units.

Description

Die vorliegende Erfindung betrifft generell eine Reinigungsvorrichtung für Druckwerke und im besonderen eine Vorrichtung zum automatischen Reinigen von Gummituchzylindern in einer lithographischen Offsetdruckmaschine.The present invention relates generally to a cleaning device for printing units and in particular to a device for automatically cleaning blanket cylinders in a lithographic offset printing machine.

In Offsetdruckmaschinen ist es die Funktion der Gummituchzylinder, die Druckbilder von den Druckplatten auf eine Materialbahn zu übertragen. Bezeichnenderweise tragen Gummituchzylinder Drucktücher mit einer darauf angebrachten Gummischicht, durch welche die Druckbilder übertragen werden.In offset printing machines, the function of the blanket cylinders is to transfer the print images from the printing plates to a material web. Significantly, blanket cylinders carry blankets with an attached rubber layer through which the printed images are transferred.

Für den Fortdruck werden eine oder mehrere Druckplatten um die Außenfläche eines Plattenzylinders gewunden, der in Kontakt mit dem Gummituchzylinder rotiert. Bei den von Gummituch zu Gummituch arbeitenden Druckmaschinen läuft eine Materialbahn zwischen zwei Gummituchzylindern, die so gelagert sind, daß ein Gummituchzylinder als Druckzylinder für den anderen dient, woraus sich das gleichzeitige beidseitige Bedrucken der Materialbahn ergibt.For continuous printing, one or more printing plates are wound around the outer surface of a plate cylinder which rotates in contact with the blanket cylinder. In the printing presses working from blanket to blanket, a web of material runs between two blanket cylinders, which are mounted in such a way that one blanket cylinder serves as a printing cylinder for the other, resulting in the simultaneous printing on both sides of the web of material.

Jedoch sammeln sich während des Fortdrucks im Offsetverfahren auf den Gummitüchern, die auf den Gummituchzylindern lagern, allerlei Fremdkörper an, z.B. getrocknete oder angehäufte Farbe, Fasern, Staub, Sand, Schmutz und dergleichen, welche beseitigt werden müssen, um die Qualität des Druckproducts aufrechtzuerhalten. Deshalb müssen die Gummitücher bei der Ausführung eines bestimmten Auftrags während des Arbeitsprocesses verschiedene Male gesäubert werden. Außerdem müssen die Gummitücher nach Erfüllung des Druckauftrags auch gereinigt werden, um das Druckbild zu entfernen. Ferner müssen Gummitücher während des Vorbereitungsprozesses gereinigt werden. Jedes mal, wenn die Gummitücher gereinigt werden müssen, ist Maschinenstillstand erforderlich.However, during the offset printing process, all kinds of foreign bodies, for example dried or accumulated ink, fibers, dust, sand, dirt and the like, accumulate on the blankets which are supported on the blanket cylinders, and these have to be removed in order to maintain the quality of the printed product. Therefore, the rubber blankets have to be cleaned several times during the execution of a certain order during the work process. In addition, the blankets must also be cleaned after the print job has been completed to remove the printed image. In addition, rubber blankets must be cleaned during the preparation process. Machine downtimes are required every time the blankets need to be cleaned.

Früher wurden Gummitücher von Hand gereinigt. Jedoch gab es bei diesem Verfahren zahlreiche Probleme, und es war sehr zeitaufwendig. In jüngster Zeit sind zur Erzielung einer effizienten Reinigung verschiedene automatische und semi-automatische Gummituchwaschvorrichtungen entwickelt und angewandt worden. Diese Vorrichtungen haben jedoch verschiedene Nachteile.In the past, rubber blankets were cleaned by hand. However, there were numerous problems with this method and it was very time consuming. Various automatic and semi-automatic blanket washers have recently been developed and used to achieve efficient cleaning. However, these devices have several disadvantages.

Erstens ist es bei diesen Vorrichtungen nicht möglich, den abgewaschenen Gummituchschmutz zu entfernen, ohne die Vorrichtungen ihrerseits während des Vorgangs zu beschmutzen, d.h. sie sind nicht selbstreinigend. Zweitens verursachen diese Vorrichtungen einen Nebel aus verschmutzter Gummituchwaschlösung, der in die anliegenden Farb- und Feuchtwerke dringt und die Qualität der Druckprodukte beeinträchtigt.First, with these devices, it is not possible to remove the washed rubber blanket dirt without in turn soiling the devices during the process, i.e. they are not self-cleaning. Second, these devices create a mist of dirty blanket wash solution that penetrates the adjacent inking and dampening systems and affects the quality of the printed products.

Es ist die Aufgabe der vorliegenden Erfindung, eine automatische Gummituchwaschvorrichtung zu schaffen, die selbstreinigend ist.It is the object of the present invention to provide an automatic blanket washer which is self-cleaning.

Es ist eine weitere Aufgabe der vorliegenden Erfindung, eine automatische Gummituchwaschvorrichtung zu schaffen, durch welche verhindert wird, daß Gummituchwaschnebel in die anliegenden Farb- und Feuchtwerke dringt.It is a further object of the present invention to provide an automatic blanket washing device which prevents blanket washing mist from penetrating into the adjacent inking and dampening units.

Die vorliegende Erfindung sieht eine Einrichtung zum Reinigen eines Gummituchzylinders in einer Rollenoffsetdruckmaschine vor, die folgende Merkmale umfaßt:
mindestens eine Bürstenwalze zum Entfernen von Fremdkörpern von dem Gummituchzylinder; eine Einrichtung für das Anstellen der Bürstenwalze an den Gummituchzylinder und die Bahn; und eine Einrichtung zum Säubern der Bürstenwalze von den von dem Gummituchzylinder entfernten Fremdkörpern. Sobald die Vorrichtung angestellt ist, bilden die Bürstenwalze, der Gummituchzylinder und die Bahn einen geschlossenen dreieckigen Bereich, und das Reinigungsmittel für die Bürstenwalze ist innerhalb dieses Bereiches untergebracht.
The present invention provides a device for cleaning a blanket cylinder in a web offset printing press, which comprises the following features:
at least one brush roller for removing foreign objects from the blanket cylinder; means for positioning the brush roller against the blanket cylinder and the web; and means for cleaning the brush roller from the foreign matter removed from the blanket cylinder. Once the device is turned on, the brush roller forms the Blanket cylinders and the web form a closed triangular area, and the cleaning agent for the brush roller is housed within this area.

Die vorliegende Erfindung kann auch zum Reinigen des Druckzylinders sowie des Gummituchzylinders und des Gummituchs verwendet werden.The present invention can also be used to clean the impression cylinder as well as the blanket cylinder and blanket.

Die vorliegende Erfindung sieht auch eine Einrichtung zum Besprühen der Bürstenwalze mit einer Gummituchwaschlösung vor.The present invention also provides a device for spraying the brush roller with a blanket washing solution.

Es ist ein Vorteil der vorliegenden Erfindung, daß die Bürstenwalze, der Gummituchzylinder und die Bahn einen geschlossenen Bereich bilden und somit eine Barriere geschaffen ist, die verhindert, daß Gummituchwaschlösung und Fremdkörper in die angrenzenden Farb- und Feuchtwerke gelangen. Dies trägt dazu bei, daß die Druckqualität der Druckprodukte während des Druckprozesses aufrechterhalten werden kann.It is an advantage of the present invention that the brush roller, the blanket cylinder and the web form a closed area and thus create a barrier which prevents blanket washing solution and foreign matter from getting into the adjacent inking and dampening units. This helps to maintain the print quality of the printed products during the printing process.

Es ist ein weiterer Vorteil der vorliegenden Erfindung, daß alle Komponenten der Reinigungsvorrichtung innerhalb des dreieckigen Bereichs in Bewegung sind, wobei eine kontinuierliche, sich selbst reinigende Fläche geschaffen ist. Da der Bediener im Gegensatz zu den herkömmlichen Gummituchwascheinrichtungen die Reinigungsvorrichtung nicht zu reinigen braucht, wird Zeit gespart.It is a further advantage of the present invention that all components of the cleaning device are in motion within the triangular area, creating a continuous, self-cleaning surface. Since the operator does not need to clean the cleaning device in contrast to the conventional blanket washing devices, time is saved.

Diese und andere Vorteile und Merkmale der Erfindung werden durch die folgende Beschreibung eines bevorzugten Ausführungsbeispiels im Zusammenhang mit den beigefügten, nachstehend erläuterten Zeichnungen weiter verdeutlicht.

Fig. 1
ist ein Seitenaufriß der erfindungsgemäßen Reinigungsvorrichtung, die im Zusammenhang mit den oberen und unteren Gummituchzylindern in ihrer operativen Position gezeigt ist;
Fig. 2
ist ein Seitenaufriß einer Einrichtung zum Aufbringen einer Gummituchwaschlösung gemäß vorliegender Erfindung im Zusammenhang mit einer Teilansicht einer Bürstenwalze gemäß vorliegender Erfindung.
These and other advantages and features of the invention are further clarified by the following description of a preferred exemplary embodiment in conjunction with the accompanying drawings explained below.
Fig. 1
is a side elevation of the cleaning device according to the invention, which in connection with the upper and lower blanket cylinders are shown in their operative position;
Fig. 2
Fig. 12 is a side elevation of a blanket washing solution applying device according to the present invention in connection with a partial view of a brush roller according to the present invention.

Fig. 1 zeigt eine Vorrichtung 10 zum automatischen Reinigen von Gummituchzylindern mit einer oberen Wascheinheit 12 und einer unteren Wascheinheit 14. Die obere Wascheinheit 12 weist eine rotierende Bürstenwalze 16 auf, die gleichzeitig mit einem oberen Gummituchzylinder 18, worauf ein Gummituch 20 axial angebracht ist, und mit einer Bahn 22 in Kontakt kommt. Die untere Wascheinheit 14 weist eine gleiche rotierende Bürstenwalze 24 auf, die gleichzeitig mit einem unteren Gummituchzylinder 26, worauf ein Gummituch 28 axial angebracht ist, und mit der Bahn 22 in Kontakt gelangt.1 shows a device 10 for the automatic cleaning of blanket cylinders with an upper washing unit 12 and a lower washing unit 14. The upper washing unit 12 has a rotating brush roller 16, which is simultaneously with an upper blanket cylinder 18, on which a blanket 20 is axially attached, and comes into contact with a web 22. The lower washing unit 14 has the same rotating brush roller 24, which simultaneously comes into contact with a lower blanket cylinder 26, on which a blanket 28 is axially attached, and with the web 22.

Die Reinigungsvorrichtung 10 gemäß vorliegender Erfindung wird vorzugsweise in ein Druckwerk der Druckmaschine integriert. Vor der Betätigung der Reinigungsvorrichtung 10 befinden sich die obere und die untere Wascheinheit 12 und 14 in einer Abstellposition. In dieser Position, nämlich in dem AUS-Modus (nicht gezeigt), befindet sich die obere Wascheinheit 12 neben dem oberen Gummituchzylinder 18 und über der Bahn 22, ist jedoch nicht mit dem oberen Gummituchzylinder oder der Bahn in Kontakt, und die untere Wascheinheit 14 befindet sich neben dem unteren Gummituchzylinder 26 und unter der Bahn 22, ist jedoch nicht mit dem unteren Gummituchzylinder oder der Bahn in Kontakt.The cleaning device 10 according to the present invention is preferably integrated into a printing unit of the printing press. Before the cleaning device 10 is actuated, the upper and lower washing units 12 and 14 are in a parking position. In this position, namely in the OFF mode (not shown), the upper washing unit 12 is next to the upper blanket cylinder 18 and above the web 22, but is not in contact with the upper blanket cylinder or web, and the lower washing unit 14 is adjacent to the lower blanket cylinder 26 and below the web 22, but is not in contact with the lower blanket cylinder or web.

Wenn die Reinigungsvorrichtung 10 sich in dem AUS-Modus befindet, kann die Maschine mit normaler Geschwindigkeit laufen, wobei die Bahn 22 sich zwischen der oberen und der unteren Wascheinheit 12 und 14 bewegt und einen normalen Druckbetrieb zuläßt. Wenn das obere und untere Gummituch 20 und 28 gereinigt werden sollen, so kann die Reinigungsvorrichtung 10 bei jeder Maschinengeschwindigkeit bis zu 914 m (3000 feet) pro Minute in ihre Anstellposition bewegt werden.When the cleaning device 10 is in the OFF mode, the machine can run at normal speed with the web 22 moving between the upper and lower washing units 12 and 14 and a normal one Allows printing. If the upper and lower blankets 20 and 28 are to be cleaned, the cleaning device 10 can be moved to its starting position at any machine speed up to 914 m (3000 feet) per minute.

Die erfindungsgemäße Reinigungsvorrichtung 10 wird durch pneumatische Zylinder in ihre Anstellposition bewegt. Diese pneumatischen Zylinder bewegen die Reinigungsvorrichtung 10 auf einer geraden Bahn in einem Winkel von 24 1/2° zur Bahn 22 auf die Gummituchzylinder 18 und 26 zu, bis die Bürstenwalze 16 mit dem Gummituchzylinder 18 und der Bahn 22 in Kontakt ist und die Bürstenwalze 24 mit dem Gummituchzylinder 26 und der Bahn 22 in Kontakt ist. Sowohl in der angestellten als auch in der abgestellten Position dient die Reinigungsvorrichtung 10 als ein Schutz, wodurch verhindert wird, daß eine Hand oder ein Arm des Bedieners/der Bedienerin in den Spalt zwischen dem oberen und unteren Gummituchzylinder 18 und 26 gerät.The cleaning device 10 according to the invention is moved into its setting position by pneumatic cylinders. These pneumatic cylinders move the cleaning device 10 on a straight path at an angle of 24 1/2 ° to the web 22 towards the blanket cylinders 18 and 26 until the brush roller 16 is in contact with the blanket cylinder 18 and the web 22 and the brush roller 24 is in contact with the blanket cylinder 26 and the web 22. In both the set and set positions, the cleaning device 10 serves as protection, thereby preventing an operator's hand or arm from getting into the gap between the upper and lower blanket cylinders 18 and 26.

Beim Betrieb der Reinigungsvorrichtung 10 rotiert die Bürstenwalze 16 in der gleichen Richtung, jedoch mit einer niedrigeren Antriebsgeschwindigkeit als der Gummituchzylinder 18, so daß ein jeweiliger, einem gegenüberliegenden Punkt entsprechender Punkt nahe dem Kontaktpunkt der Bürstenwalze 16 und des oberen Gummituchzylinders 18 sich in entgegengesetzte Richtung bewegt. Dadurch kann die Bürstenwalze 16 über die Oberfläche des Gummituchs 20 bürsten und diese von Fremdkörpern und anderem Schmutz säubern.In operation of the cleaning device 10, the brush roller 16 rotates in the same direction, but at a lower driving speed than the blanket cylinder 18, so that a respective point corresponding to an opposite point near the contact point of the brush roller 16 and the upper blanket cylinder 18 moves in the opposite direction . As a result, the brush roller 16 can brush over the surface of the rubber blanket 20 and clean it of foreign bodies and other dirt.

Unmittelbar vor dem Kontakt mit dem Gummituch 20 und der Bahn 22 wird der Bürstenwalze 16 eine ein Lösemittel, z.B. Wasser, enthaltende Waschlösung zugeführt. Mit der Bürstenwalze werden dann die Fremdkörper aus den Poren des Gummituchs 20 gelöst und von der durch den Spalt zwischen dem oberen und dem unteren Gummituchzylinder 18 und 26 laufenden Bahn 22 entfernt. Irgendwelche nach dem Kontakt der Bürstenwalze 16 mit dem Gummituch 20 auf der Bürstenwalze verbliebene, aus Gummituchwaschlösung und Fremdkörpern bestehende Rückstände werden durch eine Abstreifwalze 30 von der Bürstenwalze 16 entfernt und auf die Bahn 22 befördert.Immediately before contact with the blanket 20 and the web 22, the brush roller 16 is supplied with a washing solution containing a solvent, for example water. With the brush roller, the foreign bodies are then released from the pores of the rubber blanket 20 and through the gap between the upper and lower blanket cylinders 18 and 26 running web 22 removed. Any residues remaining after the brush roller 16 comes into contact with the rubber blanket 20 on the brush roller, consisting of blanket washing solution and foreign bodies, are removed from the brush roller 16 by a stripper roller 30 and conveyed onto the web 22.

In der Anstellposition formen die Bürstenwalze 16, der Gummituchzylinder 18 und die Bahn 22 einen oberen geschlossenen dreieckigen Bereich. Die mit der Bürstenwalze 16 in Kontakt kommende Bahn 22 säubert die Bürstenwalze weiter und dient als eine Barriere, wodurch verhindert wird, daß ein aus Gummituchwaschlösung sich formender Nebel und/oder andere Fremdkörper mit dem Farbwerk und Feuchtwerk in Berührung kommen. Alle das Dreieck bildende Teile sind in Bewegung, wodurch eine kontinuierliche, sich selbst reinigende Fläche entsteht. Die Gummituchwaschlösung bleibt in dem dreieckigen Bereich enthalten, bis diese durch den Spalt zwischen dem oberen und dem unteren Gummituchzylinder 18 und 26 abgeleitet wird.In the set position, the brush roller 16, the blanket cylinder 18 and the web 22 form an upper closed triangular area. The web 22 coming into contact with the brush roller 16 further cleans the brush roller and serves as a barrier, thereby preventing a mist and / or other foreign matter forming from a blanket washing solution from coming into contact with the inking unit and dampening unit. All parts of the triangle are in motion, creating a continuous, self-cleaning surface. The blanket wash solution remains in the triangular region until it is drained through the gap between the upper and lower blanket cylinders 18 and 26.

Zur weiteren Säuberung der Bürstenwalze 16 wird eine Abstreifwalze 30, deren Oberflächengeschwindigkeit niedriger als die der Bürstenwalze 16 ist, in Kontakt mit der Bürstenwalze 16 rotiert. Während des Kontakts der Abstreifwalze 30 mit der Bürstenwalze 16 schleudert die Abstreifwalze 30 Fremdkörper von der Bürstenwalze 16 direkt auf die Bahn 22. Die Abstreifwalze 30 ist innerhalb des oberen dreieckigen Bereichs angebracht; dadurch können sich keine Fremdkörper auf der Abstreifwalze 30 ansammeln und sie ist zudem selbstreinigend. Die Abstreifwalze 30 kann eine glatte Oberfläche aufweisen, vorzugsweise weist sie jedoch axial sich über ihre Länge erstreckende Rillen auf.To further clean the brush roller 16, a stripper roller 30, the surface speed of which is lower than that of the brush roller 16, is rotated in contact with the brush roller 16. During the contact of the stripper roller 30 with the brush roller 16, the stripper roller 30 throws foreign objects from the brush roller 16 directly onto the web 22. The stripper roller 30 is mounted within the upper triangular region; as a result, no foreign bodies can collect on the stripper roller 30 and it is also self-cleaning. The stripper roller 30 may have a smooth surface, but preferably it has grooves extending axially along its length.

Die untere Wascheinheit 14 wird in ähnlicher weise wie die obere Wascheinheit 12 betätigt. Die den unteren Gummituchzylinder 26 und die Bahn 22 gleichzeitig kontaktierende Bürstenwalze 24 rotiert in der gleichen Richtung, jedoch mit einer niedrigeren Antriebsgeschwindigkeit als der Gummituchzylinder 26, so daß ein jeweiliger, einem gegenüberliegenden Punkt entsprechender Punkt nahe dem Kontaktpunkt der Bürstenwalze 24 und des unteren Gummituchzylinders 26 sich in entgegengesetzte Richtung bewegt. Dadurch kann die Bürstenwalze 24 über die Oberfläche des Gummituchs 28 bürsten und diese von Fremdkörpern und anderem Schmutz säubern.The lower washing unit 14 is operated in a similar manner to the upper washing unit 12. The lower one Blanket cylinder 26 and brush roller 24 contacting web 22 simultaneously rotate in the same direction, but at a lower driving speed than blanket cylinder 26, so that a respective point corresponding to an opposite point near the contact point of brush roller 24 and lower blanket cylinder 26 is in opposite directions Moving direction. As a result, the brush roller 24 can brush over the surface of the rubber blanket 28 and clean it of foreign bodies and other dirt.

In der Anstellposition bilden die Bürstenwalze 24, der Gummituchzylinder 26 und die Bahn 22 einen unteren geschlossenen dreieckigen Bereich. Die mit der Bürstenwalze 24 in Kontakt kommende Bahn 22 reinigt die Bürstenwalze weiter und dient als eine Barriere, wodurch verhindert wird, daß ein sich aus Gummituchwaschlösung formender Nebel und/oder andere Fremdkörper mit dem Farbwerk und Feuchtwerk in Berührung kommen. Alle das Dreieck formenden Teile sind in Bewegung, wodurch eine kontinuierliche, sich selbst reinigende Fläche entsteht. Die Gummituchwaschlösung bleibt in dem dreieckigen Bereich enthalten, bis diese durch den Spalt zwischen dem oberen und unteren Gummituchzylinder 18 und 26 abgeleitet wird.In the set position, the brush roller 24, the blanket cylinder 26 and the web 22 form a lower closed triangular area. The web 22 coming into contact with the brush roller 24 further cleans the brush roller and serves as a barrier, thereby preventing a mist and / or other foreign matter formed from a blanket washing solution from coming into contact with the inking unit and dampening unit. All parts of the triangle are in motion, creating a continuous, self-cleaning surface. The blanket wash solution remains in the triangular region until it is drained through the gap between the upper and lower blanket cylinders 18 and 26.

Zur weiteren Säuberung der Bürstenwalze 24 wird eine Abstreifwalze 32, deren Oberflächengeschwindigkeit niedriger als die der Bürstenwalze 24 ist, in Kontakt mit der Bürstenwalze 24 rotiert. Während des Kontakts der Abstreifwalze 32 mit der Bürstenwalze 24 schleudert die Abstreifwalze 32 Fremdkörper von der Bürstenwalze 24 direkt auf die Bahn 22. Die Abstreifwalze 32 ist innerhalb des unteren dreieckigen Bereichs angebracht; dadurch können sich keine Fremdkörper auf der Abstreifwalze 32 ansammeln und zudem ist sie selbstreinigend. Die Abstreifwalze 32 kann eine glatte Oberfläche aufweisen, vorzugsweise weist sie jedoch axial sich über ihre Länge erstreckende Rillen auf.To further clean the brush roller 24, a stripper roller 32, the surface speed of which is lower than that of the brush roller 24, is rotated in contact with the brush roller 24. During the contact of the stripper roller 32 with the brush roller 24, the stripper roller 32 throws foreign bodies from the brush roller 24 directly onto the web 22. The stripper roller 32 is mounted within the lower triangular region; as a result, no foreign bodies can collect on the stripper roller 32 and it is also self-cleaning. The stripping roller 32 can be a have a smooth surface, but preferably it has grooves extending axially along its length.

Für den Fall, daß Schmutzwasser (eine Mischung von Gummituchwaschlösung und Fremdkörpern) von der unteren Wascheinheit 14 tropfen sollte, ist ein Tropfbehälter 34 unter der unteren Wascheinheit 14 vorgesehen, worin sich das Schmutzwasser sammeln kann.In the event that dirty water (a mixture of blanket washing solution and foreign bodies) should drip from the lower washing unit 14, a drip container 34 is provided under the lower washing unit 14, in which the dirty water can collect.

Die obere Wascheinheit 12 umfaßt ein Sprühschild 36, welches um die Bürstenwalze 16, weg von der Bahn 22, geschwenkt werden kann, wenn die Reinigungseinrichtung betätigt wird. Das Sprühschild 36 wird um eine Gleitlagerbüchse 38 der Bürstenwalze 16 geschwenkt und durch ein Gelenk 40 nach vorne und zurückbewegt, wenn die obere Wascheinheit 12 in ihre Anstellposition gleitet. Somit wird verhindert, daß das Schild 36 mit der Bahn 22 in Kontakt kommt, und es ist ermöglicht, daß die Bürstenwalze 16 das dritte Bein des Dreiecks bildet. Das Schild 36 hat in seiner zurückgezogenen Position auch die Funktion einer Tropfschale. Überschüssige Gummituchwaschlösung, die von der Bürstenwalze 16 tropfen könnte, wird von dem Schild 36 aufgefangen und somit vermieden, daß Tropfen direkt auf die Bahn 22 fallen. An jeden Ende des Schildes 36 sind Abflußlöcher 42 vorgesehen, damit überschüssige Lösung in den Tropfbehälter 34 abfließen kann.The upper wash unit 12 includes a spray shield 36 which can be pivoted about the brush roller 16 away from the web 22 when the cleaning device is actuated. The spray shield 36 is pivoted about a slide bearing bush 38 of the brush roller 16 and moved forwards and backwards by a joint 40 when the upper washing unit 12 slides into its setting position. Thus, the shield 36 is prevented from contacting the web 22 and the brush roller 16 is allowed to form the third leg of the triangle. The shield 36 in its retracted position also functions as a drip tray. Excess blanket washing solution that could drip from the brush roller 16 is collected by the shield 36 and thus prevents drops from falling directly onto the web 22. Drain holes 42 are provided at each end of the shield 36 so that excess solution can flow into the drip container 34.

Die Bürstenwalzen werden von einem Luftmotor 44 über einen Getriebezug 46 angetrieben. Um eine konstante Drehzahl pro Minute (RPM) aufrechtzuerhalten und ein Überdrehen der Bürstenwalzen durch die Ziehkräfte der Gummituchzylinder zu vermeiden, wird der Luftstrom an der Auslaßseite des Luftmotors 44 gedrosselt. Eine gedrosselte Auslaßleitung hält den Motor bei einem gegebenen Luftdruck auf einer konstanten Drehzahl pro Minute (RPM) bei über 30% der Maschinengeschwindigkeit. Der Motor 44 ist auf einer Querverbindung angebracht, damit er vor Lösemitteln und Fremdkörpern geschützt ist.The brush rollers are driven by an air motor 44 via a gear train 46. In order to maintain a constant speed per minute (RPM) and to avoid overturning the brush rollers by the pulling forces of the blanket cylinders, the air flow is throttled on the outlet side of the air motor 44. A throttled exhaust line maintains the engine at a constant RPM at over 30% of the machine speed at a given air pressure. The motor 44 is on one Cross connection attached so that it is protected from solvents and foreign bodies.

Die Gummituchwaschlösung wird der Bürstennwalze 16 durch einen Sprühbalken 48 zugeführt, der eine Vielzahl von Seitenöffnungen aufweist, durch welche die Waschlösung ausgesprüht wird, wie in Fig. 2 gezeigt. Diese Öffnungen sind diametral so geschaffen, daß ein gleichmäßiger Fluß durch jede Öffnung gewährleistet ist. Für den Fortdruck auf schmaler Bahn ist ein Dichtungsschirm vorgesehen, um die Gummituchwaschlösung auf ausgewählte Öffnungen umzuleiten, so daß diese nur auf den Teil der Bürstenwalze 16 aufgebracht wird, der mit der Bahn in Kontakt kommt. Dieser Dichtungsschirm besteht aus Hülsen 50, die über den Sprühbalken 48 passen und in einer Weise gedreht werden, daß sie die Öffnungen schließen. Die Hülsen 50 sind vorzugsweise 11,4 cm (4.5 inches) lang, was der halben Breite eines Blattes entspricht, und sind entlang der Länge des Sprühbalkens 48 angebracht. Es sind Gelenke 52 vorgesehen, welche die Hülsen 50 in ihre Position bewegen. Die Gelenke 52 verbinden die Hülsen 50 mit Manschetten 54. Die Manschetten 54 werden um eine Querverbindung 56 herum angebracht und ebenfalls in ihre Position bewegt, um den jeweiligen Dichtungsschirm zu öffnen oder zu schließen. Die Position der Manschetten 54 bestimmt das Öffnen und/oder Schließen während des Einziehens einer Bahn, da alle Regulierungen, die ein Schließen erforderlich machen, außerhalb der Bahn erfolgen würden.The blanket wash solution is fed to the brush roll 16 through a spray bar 48 having a plurality of side openings through which the wash solution is sprayed, as shown in FIG. 2. These openings are created diametrically so that a uniform flow through each opening is ensured. For continuous printing on a narrow web, a sealing screen is provided in order to divert the blanket washing solution to selected openings so that it is only applied to the part of the brush roller 16 that comes into contact with the web. This sealing screen consists of sleeves 50 which fit over the spray bar 48 and are rotated in such a way that they close the openings. The sleeves 50 are preferably 11.4 cm (4.5 inches) long, which is half the width of a sheet, and are attached along the length of the spray bar 48. Joints 52 are provided which move the sleeves 50 into position. The hinges 52 connect the sleeves 50 to sleeves 54. The sleeves 54 are placed around a cross connection 56 and also moved into position to open or close the respective sealing screen. The position of the cuffs 54 determines the opening and / or closing during web retraction since any regulation that would require closure would be off the web.

Aus dem Sprühbalken 48 überlaufende Gummituchwaschlösung wird in einer unter dem Sprühbalken 48 angebrachten Rinne 58 aufgefangen, wie in Fig. 2 gezeigt. Diese Gummituchwaschlösung wird über ein Abflußrohr 60 in den Tropfbehälter 34 geleitet und einem Wiederaufbereitungssystem zugeführt, wie in Fig. 1 gezeigt.Rubber blanket washing solution overflowing from the spray bar 48 is collected in a groove 58 provided under the spray bar 48, as shown in FIG. 2. This blanket washing solution is passed through a drain pipe 60 into the drip container 34 and fed to a reprocessing system, as shown in FIG. 1.

Die untere Wascheinheit 14 hat ein ähnliches Zuführsystem für die Gummituchwaschlösung mit einem Sprühbalken 62, wie in Fig. 1 gezeigt. Jedoch wird anstatt eines schwenkbaren Sprühschildes ein Tropfbehälter 34 für überschüssige, möglicherweise von der Bürstenwalze 24 tropfende Waschlösung verwendet.The lower wash unit 14 has a similar blanket wash solution delivery system with a spray bar 62 as shown in FIG. 1. However, instead of a pivotable spray shield, a drip container 34 is used for excess washing solution which may drip from the brush roller 24.

Der Tropfbehälter 34 weist ein Drahtgitter 64 auf, das sich in einem Abstand von dem Boden des Tropfbehälters befindet und mit wegwerfbarem Filterpapier 66 versehen ist, welches das Drahtgitter vollständig bedeckt. Somit werden die Festkörper aus der nunmehr mit Farbe verschmutzten Gummituchwaschlösung herausgefiltert, und es wird auf diese Weise ein Verstopfen der Abwasserleitungen verhindert. Die Gummituchwaschlösung wird dann zur weiteren Destillation in einen Abwassertank gepumpt.The drip container 34 has a wire mesh 64 which is located at a distance from the bottom of the drip container and is provided with disposable filter paper 66 which completely covers the wire mesh. The solids are thus filtered out of the blanket washing solution, which is now contaminated with paint, and in this way clogging of the sewage pipes is prevented. The blanket wash solution is then pumped into a waste water tank for further distillation.

Ferner ist die Anwendung der vorliegenden Erfindung auch für verschiedene andere Anordnungen gedacht, z.B. zum Reinigen der Druckzylinder sowie der Gummituchzylinder und Gummitücher. Die vorliegende Erfindung soll also nicht auf das Reinigen der Gummituch-zu-Gummituch-Druckwerke beschränkt bleiben.Furthermore, the application of the present invention is also intended for various other arrangements, for example for cleaning the printing cylinders and the blanket cylinders and blankets. The present invention is therefore not intended to be limited to cleaning the blanket-to-blanket printing units.

BEZUGSZEICHENLISTEREFERENCE SIGN LIST

1010th
ReinigungsvorrichtungCleaning device
1212th
obere Wascheinheitupper washing unit
1414
untere Wascheinheitlower washing unit
1616
obere Bürstenwalzeupper brush roller
1818th
oberer Gummituchzylinderupper blanket cylinder
2020th
GummituchRubber blanket
2222
Bahntrain
2424th
untere Bürstenwalzelower brush roller
2626
unterer Gummituchzylinderlower blanket cylinder
2828
GummituchRubber blanket
3030th
Abstreifwalze für die obere Bürstenwalze 16Scraper roller for the upper brush roller 16
3232
Abstreifwalze für die untere Bürstenwalze 24Scraper roller for the lower brush roller 24
3434
TropfbehälterDrip container
3636
SprühschildSpray shield
3838
Gleitlagerbüchse der Bürstenwalze 16Plain bearing bush of the brush roller 16
4040
Gelenkjoint
4242
Abflußlöcher des Schildes 36Drain holes of the shield 36
4444
LuftmotorAir motor
4646
GetriebezugGear train
4848
Sprühbalken der oberen Wascheinheit 12Spray bar of the upper washing unit 12
5050
HülsenSleeves
5252
Gelenkjoint
5454
ManschettenCuffs
5656
QuerverbindungCross-connection
5858
RinneGutter
6060
AbflußrohrDrain pipe
6262
Sprühbalken der unteren Wascheinheit 14Spray bar of the lower washing unit 14
6464
DrahtgitterWire mesh
6666
FilterpapierFilter paper

Claims (19)

  1. Device for cleaning a rubber-blanket cylinder in a web-fed rotary printing machine, which comprises the following features:
    at least one brush roller (16, 24) for removing foreign bodies from the rubber-blanket cylinder (18, 26);
    an arrangement, by means of which the brush roller (16, 24) is brought into contact with the rubber-blanket cylinder (18, 26) and the web (22); and
    an arrangement (30, 32) for cleaning the brush roller (16, 24) of the foreign bodies removed from the rubber-blanket cylinder (18, 26).
  2. Device according to Claim 1, characterized in that, in the contact position, the brush roller (16, 24), the rubber-blanket cylinder (18, 26) and the web (22) form a closed triangular region, and in that the brush-roller cleaning arrangement (30, 32) is situated inside said region.
  3. Device according to Claim 2, which further comprises:
    an arrangement for driving the brush roller (16, 24) independently of the rubber-blanket cylinder (18, 26) so that said brush roller (16, 24) can be rotated in the same direction of rotation but at a lower drive speed than that of said rubber-blanket cylinder (18, 26).
  4. Device according to Claim 3, which further comprises:
    an arrangement (48, 62) for spraying the brush roller (16, 24) with a rubber-blanket washing solution.
  5. Device according to Claim 4, characterized in that the rubber-blanket cylinder (18, 26) has a rubber blanket (20, 28) arranged axially thereon.
  6. Device according to Claim 3, characterized in that the drive arrangement is an air motor (44).
  7. Device according to Claim 1, characterized in that the brush-roller cleaning arrangement is a stripping roller (30, 32) which rotates at a lower surface speed than that of said brush roller (16, 24).
  8. Device according to Claim 7, characterized in that the stripping roller (30, 32) has grooves extending axially along its length.
  9. Device according to Claim 4, characterized in that the spraying arrangement is a spraying beam (48, 62) which has a multiplicity of side openings, through which the rubber-blanket washing solution is sprayed out.
  10. Device according to Claim 9, which further comprises:
    a multiplicity of sleeves (50) which are fitted over the spraying beam (48, 62) and assigned to the multiplicity of side openings and which can be rotated into position and close selected openings so that, in a production run on a narrow web, the rubber-blanket washing solution can be applied only to the part of the brush roller (16, 24) which is in contact with the web.
  11. Device according to Claim 1, characterized in that the arrangement, by means of which the brush roller (16, 24) is brought into contact with the rubber-blanket cylinder (18, 26) and the web (22), comprises pneumatic cylinders.
  12. Device according to Claim 1, which further comprises:
    a spraying shield (36) which is mounted pivotably about the brush roller (16, 24) and which is pivoted away from the web on actuation of the device (10).
  13. Device according to Claim 4, which further comprises:
    a drip container (34) arranged under the brush roller (16, 24).
  14. Device according to Claim 13, characterized in that the drip container (34) has a wire grating (64) at a spacing from its bottom, on which an exchangeable filter paper (66) for filtering ink solids out of the dirtied rubber-blanket washing solution is arranged.
  15. Device for cleaning an upper rubber-blanket cylinder and a lower rubber-blanket cylinder in a web-fed rotary printing machine, which comprises the following features:
    an upper brush roller (16) for removing foreign bodies from the upper rubber-blanket cylinder (18);
    a lower brush roller (24) for removing foreign bodies from the lower rubber-blanket cylinder (26);
    an arrangement, by means of which said upper brush roller (16) is brought into contact with said upper rubber-blanket cylinder (18) and the web (22) and said lower brush roller (24) is brought into contact with said lower rubber-blanket cylinder (26) and the web (22);
    a first arrangement (30) for cleaning said upper brush roller (16) of the foreign bodies removed from said upper rubber-blanket cylinder (18);
    and a second arrangement (32) for cleaning said lower brush roller (24) of the foreign bodies removed from said lower rubber-blanket cylinder (26).
  16. Device according to Claim 15, characterized in that, in the contact position, the upper brush roller (16), the upper rubber-blanket cylinder (18) and the web (22) form a closed upper triangular region and the first brush-roller cleaning arrangement (30) is situated inside said upper triangular region, and the lower brush roller (24), the lower rubber-blanket cylinder (26) and the web (22) form a closed lower triangular region and the second brush-roller cleaning arrangement (32) is situated inside said lower triangular region.
  17. Device according to Claim 16, which further comprises:
    an arrangement (48, 62) for spraying the upper and lower brush roller (16, 24) with a rubber-blanket washing solution.
  18. Device for cleaning a rubber-blanket cylinder and an impression cylinder in a web-fed rotary printing machine, which comprises the following features:
    a first brush roller (16) for removing foreign bodies from the rubber-blanket cylinder (18);
    a second brush roller (24) for removing foreign bodies from the impression cylinder;
    an arrangement, by means of which the first brush roller (16) is brought into contact with the rubber-blanket cylinder (18) and the web (22), and said second brush roller (24) is brought into contact with said impression cylinder and the web (22);
    an arrangement (30) for cleaning the first brush roller (16) of the foreign bodies removed from said rubber-blanket cylinder (18); and
    an arrangement (32) for cleaning the second brush roller (24) of the foreign bodies removed from said impression cylinder.
  19. Device according to Claim 18, characterized in that, in the contact position, the first brush roller (16), the rubber-blanket cylinder (18) and the web (22) form a closed upper triangular region and the first brush-roller cleaning arrangement (30) is situated inside said upper triangular region, and the second brush roller (24), the pressure cylinder and the web (22) form a closed lower triangular region and the second brush-roller cleaning arrangement (32) is situated inside said lower triangular region.
EP93119525A 1993-01-12 1993-12-03 Device for automatically cleaning blanket cylinders in an offset printing machine Expired - Lifetime EP0606581B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/003,355 US5257578A (en) 1993-01-12 1993-01-12 Device for automatically cleaning blanket cylinders in a offset printing press
US3355 2001-11-15

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EP0606581A1 EP0606581A1 (en) 1994-07-20
EP0606581B1 true EP0606581B1 (en) 1996-07-31

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US5257578A (en) 1993-11-02
DE59303360D1 (en) 1996-09-05
EP0606581A1 (en) 1994-07-20
DE4340542A1 (en) 1994-07-14

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