EP0085164B1 - Duct blade and device for the adjustment of the blade at the ink duct of rotary printing machines - Google Patents

Duct blade and device for the adjustment of the blade at the ink duct of rotary printing machines Download PDF

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Publication number
EP0085164B1
EP0085164B1 EP82111557A EP82111557A EP0085164B1 EP 0085164 B1 EP0085164 B1 EP 0085164B1 EP 82111557 A EP82111557 A EP 82111557A EP 82111557 A EP82111557 A EP 82111557A EP 0085164 B1 EP0085164 B1 EP 0085164B1
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EP
European Patent Office
Prior art keywords
ink
ink fountain
adjusting
knife
adjusting device
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Expired
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EP82111557A
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German (de)
French (fr)
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EP0085164A1 (en
Inventor
Rudi Junghans
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Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F31/00—Inking arrangements or devices
    • B41F31/02—Ducts, containers, supply or metering devices
    • B41F31/04—Ducts, containers, supply or metering devices with duct-blades or like metering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2231/00—Inking devices; Recovering printing ink
    • B41P2231/12—Axially segmented ink blades

Definitions

  • the invention relates to an adjusting device for the ink knife on the ink fountain of rotary printing presses with individually controllable zone-wide tongues, on which actuating means for adjusting the distance of the scraper edge from the ink fountain roller act, and which are covered with an elastic plastic cover with a smooth surface, which covers the Skimming edge extends beyond.
  • a known embodiment of this type (US Pat. No. 2,837,024) uses a thin spring steel knife in which a rubber or plastic cover is vulcanized in the area of the slots.
  • the known embodiment has the disadvantage that the cover in the area of the slits is pressed off the ink fountain roller by the back pressure of the ink, so that an uncontrolled ink strip reaches the inking unit.
  • the wear behavior of the cover and the spring steel knife is different, so that this can also lead to sealing problems on the ink fountain roller.
  • a major disadvantage of the known design is that the printer cannot determine how hard he places the individual zone on the ink fountain roller by means of the adjusting screws when the ink zone is switched off, so that higher wear is to be expected. In this case the color knife has to be reground or it cannot be used together with the vulcanized cover. This increases the effort and thus the costs for the practical use of the known design.
  • a basic setting of all scraper edges is very complex.
  • EP-A 21 002 shows an ink metering device in which no ink meter is provided on the ink fountain. Adjustments are used here, which are supported by a film on the ink fountain roller and which can be adjusted by twisting or moving. The film shown here only has to be elastic in order to adapt to the metering areas and their design.
  • the object of the invention is to design an adjusting device for the color knife in such a way that an optimal ink quantity regulation can be carried out with little effort and that the necessary adjustment work only requires a very short expenditure of time during assembly. Soiling of the adjusting means on the ink fountain by paint should also be avoided.
  • each tongue of the ink knife can be positioned from a uniform zero position via an eccentric actuating element, which is pivotally mounted on the ink fountain about a pivot point that can be adjusted to produce a uniform zero position that the ink knife is zoned in the area of its scraping edge is divided by slots with a width of less than 1 mm and that the cover consists of a thin, hard and elastic film.
  • the ink quantity to be transferred to the inking unit can be set precisely in each zone with little effort.
  • the individual tongues of the color meter can be set very precisely using a remote control so that the amount of color can be regulated without any problems.
  • the uniform zero position that can be achieved by means of adjusting means prevents the zones from being set too hard and thus prevents the film from being worn out unintentionally. This also has advantages for the remote control, because the zero position enables reproducible control of all ink meter zones. Very narrow slits in the color knife allow the use of thin foils without bulging into the slits.
  • the smooth surface of the film prevents dirt particles from sticking in front of the metering gap.
  • the film protruding over the scraper edge certainly prevents parts of the actuating device from getting dirty with paint and has low wear behavior at the metering edge. Nevertheless, e.g. incorrect handling of the paint spatula, damage to the film can then be easily replaced and the new film immediately returns to its original zero position.
  • the advantageous embodiment according to claim 2 enables the use of very thin foils, with the bending of the ink creeping along the foil feeding the ink fountain roller, so that dripping of the same is excluded with certainty.
  • Claims 3 to 6 contain advantageous refinements of the subject matter of the invention, which facilitate the operation of the color knife and the setting device and make it safer.
  • the sheets to be printed are passed between printing cylinder 1 and blanket cylinder 2 in a known manner.
  • the rubber cylinder 2 works together with a plate cylinder 3, which is provided with dampening solution and ink by a dampening unit 4 and an inking unit 5.
  • the structure of the dampening and inking unit corresponds to a modern design, the dampening solution 8 being fed from a dampening roller 6 and the ink 9 from an ink fountain roller 7 to the rollers of the dampening or inking unit.
  • a plurality of adjusting means 11 are provided on the ink fountain 10, parallel to the ink fountain roller 7, with which the ink quantity to be transferred to the inking unit can be regulated zone by zone.
  • the ink 9 is regulated by an ink knife 12 which is plate-shaped and extends over the length of the ink fountain roller 7. With large machine widths, several color knives can also be provided side by side. In the area of its scraper edge 13 up to approximately the color surface shown, the color knife is divided zone by zone by slots 14 with a very small width into tongues about 30 mm wide.
  • the slots 14 provided in the front area of the color knife 12 are less than 1 mm wide and are preferably produced in a width of approximately 0.2 mm by means of laser beams (FIG. 3).
  • the ink knife 12 is glued to a support bar 15, which in turn is fastened to the ink fountain 10 by means of screws 16.
  • the entire length and width of the color knife 12 is covered with an elastic cover, which consists of a thin, hard and elastic film 17 with a smooth surface.
  • the film 17 is preferably made of polyester or polyimide and projects beyond the scraping edge 13 of the ink knife 12. In its projecting part, it lies tangentially against the ink fountain roller 7 and is angled in its front region towards the ink fountain roller. In this way, uncontrolled ink droplets can be fed back to the lateral surface of the ink fountain roller 7, so that contamination of the inking unit is prevented.
  • it is hooked over its length in the rear area at angles 18 which are fastened to the support bar 15.
  • adjusting means 11 are provided as setting devices for the ink knife, by means of which each zone-wide tongue of the ink knife 12 can be adjusted to a precise and reproducible gap relative to the outer surface of the ink fountain roller 7.
  • each tongue rests on an eccentric control element 19 and can be precisely positioned by turning it.
  • the eccentric control element 19 is mounted on the ink fountain 10 via a fulcrum 20 to which the bearing surface 21 is eccentric.
  • the eccentric bearing surface 21 adjoins an area 22 which has a certain radius with respect to the pivot point 20 of the actuating element 19. This prevents the scraper edge 13 from being pressed against the lateral surface of the ink fountain roller 7 in such a way that the film 17 is damaged in this area.
  • the maximum provision of the scraper edge is designed so that sufficient film thickness is always maintained.
  • the control element 19 is mounted with its pivot point 20 in a fork pin 23 which is supported on the ink fountain 10 via springs 24. With the nut 25, the fork pin can be moved in the longitudinal direction and thus once the basic setting of the pivot point 20, e.g. to compensate for manufacturing tolerances.
  • the mother 25 is supported here on a sleeve 26 on the ink fountain 10. In this way, each individual zone can be set in an absolutely identical zero position to the ink fountain roller 7 over the length of the ink knife. This is done by setting once each scraper edge 13 without an inserted film 17 to an exact dimension to the lateral surface of the duct roller 7, which corresponds to approximately 50% of the film thickness. The individual zone of the colorimeter is then pretensioned by this amount.
  • a servomotor 27 which rotates a threaded pin 29 via a potentiometer 28 for indicating the position, which is mounted in the ink fountain 10.
  • the threaded pin 29 can also be turned manually using a handwheel 30.
  • a threaded bushing 31 moves in the axial direction of the threaded pin 29, so that the movement is transmitted to the actuating element 19 via a tab 32 and this pivots about the pivot point 20. Due to the preload with which the ink knife 12 rests on the support surface 21, this movement leads to an exact change in the ink gap.
  • eccentric contact surface 21 instead of the eccentric contact surface 21, other means can also be used, e.g. Rolls on which the tongues of the color knife 12 rest.
  • the actuating element 19 is guided twice by the tab 32 and the fork pin 23, so that the same is prevented from tilting.
  • the servomotor 27 can be connected to a remote control in a known manner, so that the setting of the color meter selected for a specific edition can be reproduced at any time.

Landscapes

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

Description

Die Erfindung bezieht sich auf eine Einstellvorrichtung für das Farbmesser am Farbkasten von Rotationsdruckmaschinen mit einzeln regelbaren zonenbreiten Zungen, an denen Stellmittel zum Einstellen des Abstandes der Abstreichkante gegenüber der Farbkastenwalze angreifen, und die mit einer elastischen Kunststoffabdeckung mit glatter Oberfläche belegt sind, die sich über die Abstreichkante hinaus erstreckt.The invention relates to an adjusting device for the ink knife on the ink fountain of rotary printing presses with individually controllable zone-wide tongues, on which actuating means for adjusting the distance of the scraper edge from the ink fountain roller act, and which are covered with an elastic plastic cover with a smooth surface, which covers the Skimming edge extends beyond.

Eine bekannte Ausführung dieser Art (US-PS 2 837 024) benutzt ein dünnes Federstahlmesser, bei dem im Bereich der Schlitze eine Gummi- oder Kunststoffabdeckung aufvulkanisiert ist. Die bekannte Ausführung hat den Nachteil, dass die Abdeckung im Bereich der Schlitze durch den Staudruck der Farbe von der Farbkastenwalze abgedrückt wird, so dass ein unkontrollierter Farbstreifen in das Farbwerk gelangt. Ausserdem ist das Verschleissverhalten von Abdeckung und Federstahlmesser unterschiedlich, so dass auch hierdurch Abdichtungsprobleme an der Farbkastenwalze auftreten können. Ein wesentlicher Nachteil der bekannten Ausführung ist, dass der Drucker bei abgestellter Farbzone nicht feststellen kann, wie hart er die einzelne Zone an die Farbkastenwalze über die Stellschrauben anstellt, so dass mit einem höheren Verschleiss zu rechnen ist. In diesem Falle muss das Farbmesser nachgeschliffen werden oder es ist gemeinsam mit der aufvulkanisierten Abdeckung unbrauchbar. Hierdurch erhöht sich der Aufwand und somit die Kosten für den praktischen Einsatz der bekannten Ausführung. Auch ist bei der bekannten Ausführung eine Grundeinstellung aller Abstreichkanten sehr aufwendig.A known embodiment of this type (US Pat. No. 2,837,024) uses a thin spring steel knife in which a rubber or plastic cover is vulcanized in the area of the slots. The known embodiment has the disadvantage that the cover in the area of the slits is pressed off the ink fountain roller by the back pressure of the ink, so that an uncontrolled ink strip reaches the inking unit. In addition, the wear behavior of the cover and the spring steel knife is different, so that this can also lead to sealing problems on the ink fountain roller. A major disadvantage of the known design is that the printer cannot determine how hard he places the individual zone on the ink fountain roller by means of the adjusting screws when the ink zone is switched off, so that higher wear is to be expected. In this case the color knife has to be reground or it cannot be used together with the vulcanized cover. This increases the effort and thus the costs for the practical use of the known design. In the known embodiment, a basic setting of all scraper edges is very complex.

Eine andersartige bekannte Ausführung (EP-A 21 002) zeigt eine Farbdosiereinrichtung, bei der kein Farbmesser am Farbkasten vorgesehen ist. Es werden hier Stellmittel verwendet, die sich über eine Folie an der Farbkastenwalze abstützen und durch Verdrehen oder Verschieben eine Einstellmöglichkeit bieten. Die hier gezeigte Folie muss lediglich elastisch sein, um sich den Dosierbereichen und deren Ausbildung anzupassen.Another known design (EP-A 21 002) shows an ink metering device in which no ink meter is provided on the ink fountain. Adjustments are used here, which are supported by a film on the ink fountain roller and which can be adjusted by twisting or moving. The film shown here only has to be elastic in order to adapt to the metering areas and their design.

Aufgabe der Erfindung ist, eine Einstellvorrichtung für das Farbmesser so auszubilden, dass bei geringem Aufwand eine optimale Farbmengenregulierung durchgeführt werden kann und dass die notwendigen Einstellarbeiten nur bei der Montage einen sehr geringen Zeitaufwand erforderlich machen. Auch soll ein Beschmutzen der Stellmittel am Farbkasten durch Farbe vermieden werden.The object of the invention is to design an adjusting device for the color knife in such a way that an optimal ink quantity regulation can be carried out with little effort and that the necessary adjustment work only requires a very short expenditure of time during assembly. Soiling of the adjusting means on the ink fountain by paint should also be avoided.

Die Aufgabe wird dadurch gelöst, dass jede Zunge des Farbmessers über ein exzentrisches Stellelement von einer einheitlichen Nullstellung aus positionierbar ist, das am Farbkasten um einen Drehpunkt schwenkbar gelagert ist, der zur Herstellung einer einheitlichen Nullstellung einstellbar ist, dass das Farbmesser im Bereich seiner Abstreichkante zonenweise durch Schlitze mit einer Breite von weniger als 1 mm aufgeteilt ist und dass die Abdeckung aus einer dünnen, harten und elastischen Folie besteht.The object is achieved in that each tongue of the ink knife can be positioned from a uniform zero position via an eccentric actuating element, which is pivotally mounted on the ink fountain about a pivot point that can be adjusted to produce a uniform zero position that the ink knife is zoned in the area of its scraping edge is divided by slots with a width of less than 1 mm and that the cover consists of a thin, hard and elastic film.

Mit der erfindungsgemäss ausgebildeten Einstellvorrichtung lässt sich mit geringem Aufwand eine genaue Einstellung der in das Farbwerk zu übertragenden Farbmenge in jeder Zone durchführen. Die einzelnen Zungen des Farbmessers sind über eine Fernbedienung sehr exakt einzustellen, so dass problemlos eine Regelung der Farbmenge durchgeführt werden kann. Die über Stellmittel zu erreichende einheitliche Nullstellung verhindert ein zu hartes Anstellen der Zonen und damit einen ungewollten Verschleiss der Folie. Ausserdem bringt dies Vorteile für die Fernbedienung, denn die Nullstellung ermöglicht eine reproduzierbare Regelung aller Farbmesserzonen. Sehr schmale Schlitze im Farbmesser ermöglichen die Verwendung von dünnen Folien, ohne dass diese sich in die Schlitze ausbeulen.With the setting device designed according to the invention, the ink quantity to be transferred to the inking unit can be set precisely in each zone with little effort. The individual tongues of the color meter can be set very precisely using a remote control so that the amount of color can be regulated without any problems. The uniform zero position that can be achieved by means of adjusting means prevents the zones from being set too hard and thus prevents the film from being worn out unintentionally. This also has advantages for the remote control, because the zero position enables reproducible control of all ink meter zones. Very narrow slits in the color knife allow the use of thin foils without bulging into the slits.

Die glatte Oberfläche der Folie verhindert ein Festsetzen von Schmutzteilchen vor dem Dosierspalt. Die die Abstreichkante überragende Folie verhindert mit Sicherheit ein Verschmutzen von Teilen der Stelleinrichtung mit Farbe und hat ein geringes Verschleissverhalten an der Dosierkante. Sollte dennoch, z.B. durch falsche Handhabung der Farbspachtel, eine Beschädigung der Folie auftreten, dann kann diese auf einfache Weise ausgetauscht werden und die neue Folie bringt sofort wieder die originale Nullstellung.The smooth surface of the film prevents dirt particles from sticking in front of the metering gap. The film protruding over the scraper edge certainly prevents parts of the actuating device from getting dirty with paint and has low wear behavior at the metering edge. Nevertheless, e.g. incorrect handling of the paint spatula, damage to the film can then be easily replaced and the new film immediately returns to its original zero position.

Die vorteilhafte Ausgestaltung gemäss Anspruch 2 ermöglicht die Verwendung von sehr dünnen Folien, wobei durch die Abwinkelung die an der Folie entlangkriechende Farbe der Farbkastenwalze zugeführt wird, so dass ein Abtropfen derselben mit Sicherheit ausgeschlossen ist.The advantageous embodiment according to claim 2 enables the use of very thin foils, with the bending of the ink creeping along the foil feeding the ink fountain roller, so that dripping of the same is excluded with certainty.

Die Ansprüche 3 bis 6 beinhalten vorteilhafte Ausgestaltungen des Erfindungsgegenstandes, die die Bedienung des Farbmessers und der Einstellvorrichtung erleichtern und sicherer gestalten.Claims 3 to 6 contain advantageous refinements of the subject matter of the invention, which facilitate the operation of the color knife and the setting device and make it safer.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen schematisch dargestellt. Es zeigt:

  • Fig. 1 eine Seitenansicht eines Offsetdruckwerkes,
  • Fig. 2 einen Teilquerschnitt durch einen Farbkasten und
  • Fig. 3 eine Draufsicht auf Folie und Farbmesser.
An embodiment of the invention is shown schematically in the drawings. It shows:
  • 1 is a side view of an offset printing unit,
  • Fig. 2 shows a partial cross section through an ink fountain and
  • Fig. 3 is a plan view of the film and color knife.

Bei der in Fig. 1 gezeigten Seitenansicht eines Offsetdruckwerkes werden die zu bedruckenden Bogen in bekannter Weise zwischen Druckzylinder 1 und Gummizylinder 2 hindurchgeführt. Der Gummizylinder 2 arbeitet mit einem Plattenzylinder 3 zusammen, der von einem Feuchtwerk 4 und einem Farbwerk 5 mit Feuchtmittel und Farbe versehen wird. Der Aufbau des Feucht- und Farbwerkes entspricht einer modernen Bauweise, wobei das Feuchtmittel 8 von einem Feuchtduktor 6 und die Farbe 9 von einer Farbkastenwalze 7 den Walzen des Feucht- bzw. Farbwerks zugeführt wird. Zur zonenweisen Einstellung der Farbmenge sind am Farbkasten 10, parallel zur Farbkastenwalze 7, eine Vielzahl Stellmittel 11 vorgesehen, mit denen die in das Farbwerk zu übertragende Farbmenge zonenweise reguliert werden kann.In the side view of an offset printing unit shown in FIG. 1, the sheets to be printed are passed between printing cylinder 1 and blanket cylinder 2 in a known manner. The rubber cylinder 2 works together with a plate cylinder 3, which is provided with dampening solution and ink by a dampening unit 4 and an inking unit 5. The structure of the dampening and inking unit corresponds to a modern design, the dampening solution 8 being fed from a dampening roller 6 and the ink 9 from an ink fountain roller 7 to the rollers of the dampening or inking unit. For zone-by-zone adjustment of the ink quantity, a plurality of adjusting means 11 are provided on the ink fountain 10, parallel to the ink fountain roller 7, with which the ink quantity to be transferred to the inking unit can be regulated zone by zone.

Wie aus Fig. 2 ersichtlich, wird die Farbe 9 von einem Farbmesser 12 geregelt, das plattenförmig ausgebildet ist und sich über die Länge der Farbkastenwalze 7 erstreckt. Bei grossen Maschinenbreiten können auch mehrere Farbmesser nebeneinander vorgesehen sein. Im Bereich seiner Abstreichkante 13 bis etwa zur eingezeichneten Farboberfläche ist das Farbmesser zonenweise durch Schlitze 14 mit sehr geringer Breite in etwa 30 mm breite Zungen aufgeteilt. Die im vorderen Bereich des Farbmessers 12 vorgesehenen Schlitze 14 sind weniger als 1 mm breit und werden vorzugsweise in einer Breite von etwa 0,2 mm mittels Laserstrahlen hergestellt (Fig. 3). Im ungeschlitzten Bereich ist das Farbmesser 12 auf eine Tragleiste 15 aufgeklebt, die wiederum mittels Schrauben 16 am Farbkasten 10 befestigt ist.As can be seen from FIG. 2, the ink 9 is regulated by an ink knife 12 which is plate-shaped and extends over the length of the ink fountain roller 7. With large machine widths, several color knives can also be provided side by side. In the area of its scraper edge 13 up to approximately the color surface shown, the color knife is divided zone by zone by slots 14 with a very small width into tongues about 30 mm wide. The slots 14 provided in the front area of the color knife 12 are less than 1 mm wide and are preferably produced in a width of approximately 0.2 mm by means of laser beams (FIG. 3). In the unslit area, the ink knife 12 is glued to a support bar 15, which in turn is fastened to the ink fountain 10 by means of screws 16.

Die ganze Länge und Breite des Farbmessers 12 ist mit einer elastischen Abdeckung belegt, die aus einer dünnen, harten und elastischen Folie 17 mit glatter Oberfläche besteht. Die Folie 17 besteht vorzugsweise aus Polyester oder Polyimid und überragt die Abstreichkante 13 des Farbmessers 12. In ihrem überstehenden Teil liegt sie tangential an der Farbkastenwalze 7 an und ist in ihrem vorderen Bereich zur Farbkastenwalze hin abgewinkelt. Hiermit lassen sich unkontrolliert austretende Farbtröpfchen wieder der Mantelfläche der Farbkastenwalze 7 zuführen, so dass ein Verschmutzen des Farbwerks verhindert wird. Um ein leichtes Auswechseln der Folie 17 zu ermöglichen, ist diese über ihre Länge im hinteren Bereich in Winkel 18 eingehakt, die an der Tragleiste 15 befestigt sind.The entire length and width of the color knife 12 is covered with an elastic cover, which consists of a thin, hard and elastic film 17 with a smooth surface. The film 17 is preferably made of polyester or polyimide and projects beyond the scraping edge 13 of the ink knife 12. In its projecting part, it lies tangentially against the ink fountain roller 7 and is angled in its front region towards the ink fountain roller. In this way, uncontrolled ink droplets can be fed back to the lateral surface of the ink fountain roller 7, so that contamination of the inking unit is prevented. In order to enable easy replacement of the film 17, it is hooked over its length in the rear area at angles 18 which are fastened to the support bar 15.

Als Einstellvorrichtung für das Farbmesser sind im gezeigten Ausführungsbeispiel Stellmittel 11 vorgesehen, mittels denen jede zonenbreite Zunge des Farbmessers 12 gegenüber der Mantelfläche der Farbkastenwalze 7 auf einen genauen und reproduzierbaren Spalt einstellbar sind. Hierzu liegt jede Zunge auf einem exzentrischen Stellelement 19 auf und ist durch Verdrehen desselben genau positionierbar. Das exzentrische Stellelement 19 ist am Farbkasten 10 über einen Drehpunkt 20 gelagert, zu dem die Auflagefläche 21 exzentrisch ausgebildet ist. Hierdurch wird die Stellung der Abstreichkante 13 mehr oder weniger zur Mantelfläche der Farbkastenwalze 7 hin bewegt. Zur Hubbegrenzung schliesst die exzentrische Auflagefläche 21 an einen Bereich 22 an, der zum Drehpunkt 20 des Stellelements 19 einen bestimmten Radius aufweist. Hiermit wird verhindert, dass die Abstreichkante 13 so an die Mantelfläche der Farbkastenwalze 7 angedrückt wird, dass in diesem Bereich die Folie 17 beschädigt wird. Die maximale Beistellung der Abstreichkante istso ausgelegt, dass immer eine ausreichende Folienstärke erhalten bleibt.In the exemplary embodiment shown, adjusting means 11 are provided as setting devices for the ink knife, by means of which each zone-wide tongue of the ink knife 12 can be adjusted to a precise and reproducible gap relative to the outer surface of the ink fountain roller 7. For this purpose, each tongue rests on an eccentric control element 19 and can be precisely positioned by turning it. The eccentric control element 19 is mounted on the ink fountain 10 via a fulcrum 20 to which the bearing surface 21 is eccentric. As a result, the position of the scraper edge 13 is moved more or less towards the lateral surface of the ink fountain roller 7. To limit the stroke, the eccentric bearing surface 21 adjoins an area 22 which has a certain radius with respect to the pivot point 20 of the actuating element 19. This prevents the scraper edge 13 from being pressed against the lateral surface of the ink fountain roller 7 in such a way that the film 17 is damaged in this area. The maximum provision of the scraper edge is designed so that sufficient film thickness is always maintained.

Das Stellelement 19 ist mit seinem Drehpunkt 20 in einem Gabelzapfen 23 gelagert, der über Federn 24 am Farbkasten 10 abgestützt ist. Mit der Mutter 25 lässt sich der Gabelzapfen in Längsrichtung verschieben und somit bei der Montage einmalig die Grundeinstellung des Drehpunktes 20, z.B. zum Ausgleich von Fertigungstoleranzen verändern. Die Mutter 25 stützt sich hierbei über eine Büchse 26 am Farbkasten 10 ab. Hiermit ist auf einfache Weise über die Länge des Farbmessers jede einzelne Zone in eine absolut gleiche Nullstellung zur Farbkastenwalze 7 einzustellen. Dies geschieht dadurch, dass einmalig bei der Montage jede Abstreichkante 13 ohne eingelegte Folie 17 auf ein genaues Mass zur Mantelfläche der Duktorwalze 7 eingestellt wird, das etwa 50% der Folienstärke entspricht. Um diesen Betrag steht sodann die einzelne Zone des Farbmessers unter Vorspannung.The control element 19 is mounted with its pivot point 20 in a fork pin 23 which is supported on the ink fountain 10 via springs 24. With the nut 25, the fork pin can be moved in the longitudinal direction and thus once the basic setting of the pivot point 20, e.g. to compensate for manufacturing tolerances. The mother 25 is supported here on a sleeve 26 on the ink fountain 10. In this way, each individual zone can be set in an absolutely identical zero position to the ink fountain roller 7 over the length of the ink knife. This is done by setting once each scraper edge 13 without an inserted film 17 to an exact dimension to the lateral surface of the duct roller 7, which corresponds to approximately 50% of the film thickness. The individual zone of the colorimeter is then pretensioned by this amount.

Zum Einstellen des Spalts zwischen Abstreichkante 13 und Farbkastenwalze 7 über das Stellelement 19 dient ein Stellmotor 27, der über einen Potentiometer 28 zur Stellungsanzeige einen Gewindezapfen 29 verdreht, der im Farbkasten 10 gelagert ist. Der Gewindezapfen 29 lässt sich über ein Handrad 30 auch manuell verdrehen. Durch das Verdrehen bewegt sich eine Gewindebüchse 31 in Achsrichtung des Gewindezapfens 29, so dass die Bewegung über eine Lasche 32 auf das Stellelement 19 übertragen wird und dieses um den Drehpunkt 20 schwenkt. Durch die Vorspannung, mit der das Farbmesser 12 auf der Auflagefläche 21 aufliegt, führt diese Bewegung zu einer exakten Veränderung des Farbspalts. Anstelle der exzentrischen Auflagefläche 21 lassen sich auch andere Mittel einsetzen, z.B. Röllchen, auf denen die Zungen des Farbmessers 12 aufliegen. Das Stellelement 19 ist durch die Lasche 32 und den Gabelzapfen 23 doppelt geführt, so dass ein Kippen desselben vermieden wird. Der Stellmotor 27 lässt sich in bekannter Weise an eine Fernbedienung anschliessen, so dass die für eine bestimmte Auflage gewählte Einstellung des Farbmessers jederzeit reproduzierbar ist.To adjust the gap between the scraper edge 13 and the ink fountain roller 7 via the actuating element 19, a servomotor 27 is used, which rotates a threaded pin 29 via a potentiometer 28 for indicating the position, which is mounted in the ink fountain 10. The threaded pin 29 can also be turned manually using a handwheel 30. As a result of the rotation, a threaded bushing 31 moves in the axial direction of the threaded pin 29, so that the movement is transmitted to the actuating element 19 via a tab 32 and this pivots about the pivot point 20. Due to the preload with which the ink knife 12 rests on the support surface 21, this movement leads to an exact change in the ink gap. Instead of the eccentric contact surface 21, other means can also be used, e.g. Rolls on which the tongues of the color knife 12 rest. The actuating element 19 is guided twice by the tab 32 and the fork pin 23, so that the same is prevented from tilting. The servomotor 27 can be connected to a remote control in a known manner, so that the setting of the color meter selected for a specific edition can be reproduced at any time.

Claims (6)

1. Adjusting device for the ink knife provided at the ink fountain of a rotary printing machine having individually controllable zone-wide tongues at which adjusting means engage for adjusting the gap between the stripping edge and the ink fountain roller and which are covered with an elastic covering of synthetic material having a smooth surface, said elastic covering projecting beyond said stripping edge, wherein each tongue of the ink knife (12) can be positioned by means of an eccentric adjusting element (19) from a uniform zero position, said eccentric adjusting element being pivotally mounted on a pivot (20) at the ink fountain (10), said pivot being adjustable for generating a uniform zero position, wherein in the region of said stripping edge (13) the ink knife (12) is divided zone by zone by slits (14) each of which is less than one millimeter wide and wherein the covering is formed of a thin, hard and elastic foil (17).
2. Adjusting device according to Claim 1, wherein each of the slits (14) provided in the front region of the ink knife (12) preferrably has a width of 0.2 mm, wherein the foil (17) is formed of polyester or polyimide and the front region thereof, which projects beyond the stripping edge (13), is angled towards the ink fountain roller (7).
3. Adjusting device according to Claim 1 and Claim 2, wherein the rear region of the ink knife (12) is stuck on a supporting rail (15), which, in turn, is fastened to the ink fountain (10).
4. Adjusting device according to Claims 1 to 3, wherein the slits (14) are provided between the stripping edge (13) and the supporting rail (15).
5. Adjusting device according to Claim 1, wherein the pivot (20) of the adjusting element (19) is mounted in a fork pin (23) which is supported on the ink fountain (10) by a spring (24) and is adjustable by means of a nut (25).
6. Adjusting device according to Claim 1, wherein for the zonewise control of the ink knife (12) there are provided at the adjusting element (19) eccentric sections (21) which, in order to limit the stroke, border on a region (22) having a certain radius with respect to the pivot (20) of the adjusting element (19).
EP82111557A 1982-02-03 1982-12-13 Duct blade and device for the adjustment of the blade at the ink duct of rotary printing machines Expired EP0085164B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3203500 1982-02-03
DE3203500A DE3203500C2 (en) 1982-02-03 1982-02-03 Inking knife and an adjusting device for an inking knife

Publications (2)

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EP0085164A1 EP0085164A1 (en) 1983-08-10
EP0085164B1 true EP0085164B1 (en) 1987-03-11

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EP82111557A Expired EP0085164B1 (en) 1982-02-03 1982-12-13 Duct blade and device for the adjustment of the blade at the ink duct of rotary printing machines

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US (1) US4495864A (en)
EP (1) EP0085164B1 (en)
JP (1) JPS58138652A (en)
AT (1) AT386156B (en)
CA (1) CA1208071A (en)
DE (2) DE3203500C2 (en)
DK (1) DK156888C (en)
ES (1) ES277341Y (en)
ZA (1) ZA829560B (en)

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Also Published As

Publication number Publication date
ES277341Y (en) 1986-10-01
DK156888B (en) 1989-10-16
ZA829560B (en) 1983-10-26
AT386156B (en) 1988-07-11
JPH0329592B2 (en) 1991-04-24
JPS58138652A (en) 1983-08-17
DE3275638D1 (en) 1987-04-16
DE3203500A1 (en) 1983-08-11
ATA473482A (en) 1987-12-15
DK483D0 (en) 1983-01-03
US4495864A (en) 1985-01-29
DK156888C (en) 1990-03-12
CA1208071A (en) 1986-07-22
ES277341U (en) 1986-01-16
EP0085164A1 (en) 1983-08-10
DE3203500C2 (en) 1988-03-03
DK483A (en) 1983-08-04

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