EP0123049B1 - Printing machine with a pressure cylinder, in particular a screen printer - Google Patents

Printing machine with a pressure cylinder, in particular a screen printer Download PDF

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Publication number
EP0123049B1
EP0123049B1 EP84101851A EP84101851A EP0123049B1 EP 0123049 B1 EP0123049 B1 EP 0123049B1 EP 84101851 A EP84101851 A EP 84101851A EP 84101851 A EP84101851 A EP 84101851A EP 0123049 B1 EP0123049 B1 EP 0123049B1
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EP
European Patent Office
Prior art keywords
roller
web
printing machine
impression cylinder
changing means
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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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EP84101851A
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German (de)
French (fr)
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EP0123049A2 (en
EP0123049A3 (en
Inventor
Gerhard Klemm
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Individual
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Individual
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Publication of EP0123049A2 publication Critical patent/EP0123049A2/en
Publication of EP0123049A3 publication Critical patent/EP0123049A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/16—Printing tables
    • B41F15/18—Supports for workpieces
    • B41F15/24—Supports for workpieces for webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—Machines
    • B41F15/0831—Machines for printing webs

Definitions

  • the invention relates to a screen printing machine working with a counter-pressure roller, according to the preamble of claim 1.
  • DE-A-2 425 693 describes a screen printing machine with side-edge control that works with a counter-pressure roller, the printing machine being designed to operate in discontinuous mode, and the machine having a device for register marking or reading, which is located in front of the counter-pressure roller.
  • This device works on the principle of aligning the continuous fabric web in a printing press in such a way that the fabric web is brought into an obliquely angled position in order to control the lateral movement of the fabric web during printing.
  • a horizontally reciprocating screen frame support is used, which strikes an elastic, movable printing cylinder frame, whereby adjustment of the screen to the printing cylinder is achieved.
  • DE-A 2 314 045 describes a continuously operating machine in which devices for register reading are provided directly in front of the counter-pressure roller between the latter and upstream deflection devices.
  • control vibrations there are no so-called control vibrations in the side edge run and the deflections between the printing units do not serve to eliminate the control vibrations of the side edge run, but are register rollers which compensate for the distance changes in order to obtain a perfect multicolor print. They are intended to compensate for these distances, which are subject to fluctuations due to stretching or shrinking and pinching.
  • these deflection rollers are integrated in a precisely working measuring system and its measuring methods.
  • the present invention is intended for the use of a discontinuously running web of material which is to be doctored discontinuously over a movably arranged flat screen template, the web of material also being transported forward discontinuously.
  • side edge controls are to be provided, each of which is arranged upstream of the printing unit in the direction of travel of the goods. These side edge controls are intended to prevent an increased side profile of the web, in contrast to the aforementioned DE-A 2 425 693 where the side profile is deliberately achieved.
  • side edge controls are selected which respond immediately when the web runs to the right or left from the desired position.
  • frames are used which pivot about a vertical axis in the infeed area of the web and which carry so-called edge sensors in the outfeed area. If the goods run to the right or left, a corresponding signal is given.
  • This side edge control therefore has the task of supplying the web of material to the printing unit in an exactly aligned manner, it being provided in particular for maintaining the side repeat.
  • compliance with the side repeat is extremely important.
  • the registration mark is preferably entered by punching holes or by another marking known per se, as a result of which the longitudinal repeat is determined.
  • the page repeat is generally adhered to by the side edge control in order to prevent the subsequent printing station either from being placed on the same machine when it is being rerun, or from being printed in a different printing station at a different position from the page repeat.
  • the side edge controls have the disadvantage, however, that they cause unrest on the web and in particular influence the adherence to the longitudinal repeat by transporting the web to the right and left, counter to the direction in which they run out, which means that the longitudinal repeat can also change somewhat.
  • the present invention is therefore based on the object to provide a device with which it is possible to eliminate the albeit slight unrest factor by the side edge control in such a way that an absolutely smooth, even, discontinuous feed to the counter-pressure roller is ensured, after the material web has calmed down the longitudinal repeat is precisely determined or read, so that the material web is calmed down and fed precisely to the counter-pressure roller.
  • the inlet is completely calmed down and the web of goods is fed to the impression cylinder by a relatively simple measure, and an increased lateral profile is also prevented at the same time.
  • the device is to be operated discontinuously and thus there are increased control vibrations in the lateral guide, these can be largely eliminated by the deflections.
  • Fig. 1 the device is shown schematically.
  • a screen printing station 2 in the upper area, consisting of a drive-provided, movably guided screen stencil 20 and a squeegee arrangement 21, also provided with conventional movement mechanisms Scrapering of the web 4 which is carried out discontinuously in the present case is possible.
  • the material web comes from a supply (not shown) via an infeed unit 5, consisting of a dancer roller 50 and / or vacuum strip 51, to enable tension to be built up in the material web.
  • Both the dancer roller 50 and the vacuum bar 51 hold back the web, wherein the dancer roller 50 can also be a control element for the pull roller 6, which is arranged as an outlet roller at the opposite end of the machine.
  • This pull roller 6 runs somewhat faster than the other transport devices, so that tension builds up constantly in the web. It can have a higher peripheral speed.
  • a deflection device is arranged downstream of the side edge controls 7, 7 '.
  • This deflection device consists of at least two, but preferably three, rollers 90, 91, 92, the deflection device being arranged in the exemplary embodiments shown in FIGS. 1 and 3 such that a web loop 40 is formed.
  • the deflection rollers which can also be deflection rollers or rods, lie in such a way that the web of material, which is preferably guided vertically in this area, is first deflected horizontally by preferably 90 ° to the left by the deflection roller 90 and then by the deflection roller 91 is preferably returned 180 ° and is deflected by the deflecting roller 92 again by preferably 90 ° into the vertical, so that a U is formed in the barrel.
  • the counter-pressure roller 3 onto which the web 4 is tangentially guided.
  • the area between the deflecting roller 92 and the counter-pressure roller 3 is selected so that a device for register marking or reading 8 'can be arranged directly in front of the counter-pressure roller 3 in the direction of travel of the goods.
  • deflection rollers, rollers or rods can be fixed, rotatably mounted, but can also be driven.
  • the deflecting roller, roller or rod 91 as a voltage regulator and to mount it movably in the arrow directions A.
  • the web guide between an overflow roller 77 leading into the vertical web guide and the counter-pressure roller 3 should lie in alignment, which is an elongated, preferably vertical tangent of the conveyed web 4 to the counter-pressure roller 3.
  • a deflection from this escape line only causes the deflection device 9, which is interposed to calm the web 4.
  • a further device for register marking or reading 8 can be connected upstream of the web guide, which device can be used for preliminary checking.
  • the deflection device is designed such that it consists only of the two rollers 90 and 91, which in turn can also be deflecting rods, the web being guided twice in the Z only.
  • the U-guide is more advantageous, so that there is a web loop.
  • Fig. 4 shows a parallel offset of the web guide.
  • the web guide between the overflow roller 77 and the counter-pressure roller 3 is not in alignment in this example.
  • the web 4 is guided in the vertical direction in the direction of the goods onto the deflecting roller, roll or rod 90.
  • the so-called device for register marking or reading can be arranged in the web guide.
  • the deflection roller 90 deflects the web 4 by preferably 90 ° to the right into the horizontal to the deflection roller 91.
  • the web 4 is preferably returned to the vertical by 90 ° and passed onto the counter-pressure roller 3.
  • the area between the deflection roller 91 and the counter-pressure roller 3 is also selected here such that, as in FIGS.
  • This intermediate space between the deflection device and the counter-pressure roller 3 is again dimensioned relatively short in order to apply or read the registration mark immediately after the web has calmed down by the deflection device and then immediately apply the web to the counter-pressure roller.
  • FIG. 2 and 5 representations of the side edge control are shown.
  • two side edge controls are connected in series, namely the side edge controls 7 and 7 '.
  • FIG. 5 Their design corresponds to the embodiment in Fig. 5. It is a pivotally suspended frame 72.
  • the frame pivot point is designated 73 in the drawing. It is a vertical axis about which the frame can pivot and which is located in the inlet area of the web 4.
  • the side opposite the frame pivot point carries edge sensors 74 which are U-shaped and lie opposite one another and which enclose the web 4 between them. If the web runs to the right or left, a signal is given, whereby an adjustment motor is switched on, which pivots the entire frame.
  • the adjusting motor 75 is fixedly mounted in the device and causes the frame to be pivoted in the direction of the arrow B and the frame pivot point 73, as a result of which the overflow rollers 76, 77 incline, in each case swinging out to the right or left, as shown in FIG. 2 .
  • a foldable pressure roller or wide stretching roller 31 Associated with the counterpressure roller is a foldable pressure roller or wide stretching roller 31, which is preferably carried along by the movement of the web 4.
  • material web such as paper, film, and possibly also transitions to goods containing fiber material.
  • the invention is not limited to the exemplary embodiments shown. It is important that the displacement of the web to align the side repeat results in an accurate feed of the web in the longitudinal repeat to the counter-pressure roller 3 and that a precise distance from the printing area is achieved here. This can be done by the device for register marking or reading 8 in front of the deflection device 9 or by an identical device for register marking or reading in the course of the goods after the deflection device 9, which is denoted by 8 'in the drawing and thus between the deflection device 9 and the counter-pressure roller 3. Placement in the upper area is more advantageous because a more precise distance from the printed image can be achieved by an upper photo cell arranged in this way. This distance plays a particularly important role if the web is already provided with registration marks in the first pass and the registration marks have to be read in the second, third or fourth pass in order to enable a very exact, for example multi-color printing.
  • the arrangement of the deflection device 9 of a compensating roller or the arrangement of a web loop 40 is more advantageous than the simple deflection via two deflection rollers, rollers or rods 90, 91 in each case by approximately 90 °. It is most advantageous to use the deflection roller or roller 91 as a tension control roller or roller, it being electrically connected to the drive of at least one pull roller 6 located in the outlet region of the machine and acting on its speed. It is advantageous if the deflecting rollers or rollers 90, 92 lie directly one above the other, so that the web loop has two identical ends.
  • the deflection device prevents the unrest that emanates from the side edge or rail edge control 7, 7 'from somehow reaching the printing area.
  • the device advantageously works discontinuously. A high register accuracy is achieved with the device:
  • the two devices 8 'and 8 “must be arranged and assigned to the side edges of the web in such a way that one of the devices, for example the device 8' on the right side attaches or reads the register marks, and the one on the other side of the counter-pressure roller 3 Device 8 "for example on the left side of the web is not.
  • the shift in relation to the counter-pressure roller also results from the diagonal arrangement of the register marks of the material that is not rewound.

Description

Die Erfindung betrifft eine mit Gegendruckwalze arbeitende Siebdruckmaschine, entsprechend dem Gattungsbegriff des Anspruches 1.The invention relates to a screen printing machine working with a counter-pressure roller, according to the preamble of claim 1.

Derartige Maschinen sind an sich bekannt. So beschreibt die DE-A-2 425 693 eine mit Gegendruckwalze arbeitende Siebdruckmaschine mit Seitenkantensteuerung, wobei die Druckmaschine im diskontinuierlichen Betrieb arbeitend ausgebildet ist, und die Maschine eine Einrichtung zur Passermarkierung bzw. Ablesung aufweist, die sich vor der Gegendruckwalze befindet. Diese Vorrichtung arbeitet nach dem Prinzip, das Ausrichten der durchgehenden Gewebebahn in einer Druckmaschine derart vorzunehmen, daß die Gewebebahn in eine schiefwinkelige Lage gebracht wird, um damit die seitliche Bewegung der Gewebebahn während des Druckens zu steuern. Un nun dieser schiefwinkeligen Lage der Gewebebahn Rechnung zu tragen, wird ein horizontal hin- und hergehender Siebrahmenträger benutzt, der an einen elastischen bewegbahren Druckzylinderrahmen anschlägt, wodurch eine Justierung des Siebes zum Druckzylinder erreicht wird.Such machines are known per se. For example, DE-A-2 425 693 describes a screen printing machine with side-edge control that works with a counter-pressure roller, the printing machine being designed to operate in discontinuous mode, and the machine having a device for register marking or reading, which is located in front of the counter-pressure roller. This device works on the principle of aligning the continuous fabric web in a printing press in such a way that the fabric web is brought into an obliquely angled position in order to control the lateral movement of the fabric web during printing. In order to take this oblique position of the fabric web into account, a horizontally reciprocating screen frame support is used, which strikes an elastic, movable printing cylinder frame, whereby adjustment of the screen to the printing cylinder is achieved.

Abgesehen davon, daß es nicht einfach ist, eine Gewebebahn seitlich zu erfassen, und ohne Beeinträchtigung derselben sie in eine schiefwinkelige Lage zu bringen, ist dieses Verfahren für andere Druckträger wie Papier, Pappe, Folien und dgl. meist nicht anwendbar. Diese ließen sich nür Schwer in eine schiefwinkelige Lage ziehen, wenn auch in der genannten DE-A 2 425 693 heraus gestellt ist, daß auch andere Druckmaterialien als Gewebe auf der Maschine gedruckt werden könnten. Diese anderen Druckmaterialien dürfen zumindest beim Herausziehen in der erwähnte schiefwinkelige Lage keine Knitterfalten bilden. Es kämen höchstens Filze und sehr lockere Nonwoven in Frage. Die hier erwähnte Seitenkantensteuerung ist im Grunde eine Seitenzieheinrichtung.In addition to the fact that it is not easy to grasp a web of fabric laterally and to bring it into an oblique position without impairing it, this method is usually not applicable to other printing media such as paper, cardboard, foils and the like. These were difficult to pull into an oblique position, even if it is stated in DE-A 2 425 693 that printing materials other than fabric could also be printed on the machine. These other printing materials must not crease, at least when pulled out in the oblique position mentioned. At most, felt and very loose nonwovens could be used. The side edge control mentioned here is basically a side pulling device.

Weiterhin ist durch die DE-A 2 314 045 eine kontinuierlich arbeitende Maschine beschrieben, bei der unmittelbar vor der Gegendruckwalze zwischen dieser und vorgeordneten Umlenkvorrichtungen, Vorrichtungen zur Passerablesung vorgesehen sind. Bei solchen kontinuerlich arbeitenden Maschinen, treten keine sogenannten Regelschwingungen im Seitenkantenlaüf auf und die Umlenkungen zwischen den Druckwerken dienen nicht zur Eliminierung der Regelschwingungen des Seitenkantenlaufs, sondern sind Registerwalzen dieAbstandsänderungen ausgleichen, um einen einwandfreien Mehrfarbendruck zu erhalten. Sie sollen diese Abstände, die Schwankungen unterworfen sind, die auf Dehnung oder Schrumpfung und Quetschfalten zurückzuführen sind ausgleichen. Demzufolge sind diese Umlenkwalzen integriert in ein genau arbeitendes Meßsystem und dessen Meßmethoden.Furthermore, DE-A 2 314 045 describes a continuously operating machine in which devices for register reading are provided directly in front of the counter-pressure roller between the latter and upstream deflection devices. In the case of such continuously operating machines, there are no so-called control vibrations in the side edge run and the deflections between the printing units do not serve to eliminate the control vibrations of the side edge run, but are register rollers which compensate for the distance changes in order to obtain a perfect multicolor print. They are intended to compensate for these distances, which are subject to fluctuations due to stretching or shrinking and pinching. As a result, these deflection rollers are integrated in a precisely working measuring system and its measuring methods.

Die vorliegende Erfindung ist für den Einsatz einer diskontinuierlich laufenden Warenbahn gedacht, die über eine beweglich angeordnete ebene Siebschablone diskontinuierlich berakelt werden soll, wobei auch die Warebahn diskontinuierlich vorwärts transportiert wird. In dieser Vorrichtung sind Seitenkantensteuerungen vorzusehen die jeweils dem Druckwerk in Warenlaufrichtung gesehen vorgeordnet sind. Diese Seitenkantensteuerungen sollen einen erhöhten Seitenverlauf der Warenbahn verhindern, im Gegensatz zu der erwähnten DE-A 2 425 693 wo der Seitenverlauf bewußt erzielt wird. Beim Erfindungsgegenstand werden Seitenkantensteuerungen gewählt, die sofort, wenn die Warenbahn aus der gewünschten Position nach rechts oder links ausläuft ansprechen. Dazu benutzt man Rahmen, die um eine vertikal stehende im Einlaufbereich der Warenbahn liegende Achse schwenken und die im Auslaufbereich sogenannte Kantenfühler tragen. Läuft die Waren bahn nach rechts oder links aus, so erfolgt ein entsprechendes Signal.The present invention is intended for the use of a discontinuously running web of material which is to be doctored discontinuously over a movably arranged flat screen template, the web of material also being transported forward discontinuously. In this device, side edge controls are to be provided, each of which is arranged upstream of the printing unit in the direction of travel of the goods. These side edge controls are intended to prevent an increased side profile of the web, in contrast to the aforementioned DE-A 2 425 693 where the side profile is deliberately achieved. In the subject of the invention, side edge controls are selected which respond immediately when the web runs to the right or left from the desired position. For this purpose, frames are used which pivot about a vertical axis in the infeed area of the web and which carry so-called edge sensors in the outfeed area. If the goods run to the right or left, a corresponding signal is given.

Diese Seitenkantensteuerung hat somit die Aufgabe, die Warenbahn exakt ausgerichtet dem Druckwerk zuzuführen, wobei sie insbesondere zur Wahrung des Seitenrapportes vorgesehen ist. Insbesondere bei Druckmaschinen mit mehreren Druckstationen oder Aufgragsstationen, ist die Einhaltung des Seitenrapportes ungeheuer wichtig. Wird die erste Farbe aufgesetzt, so erfolgt der Eintrag der Passermarkierung vorzugsweise durch Lochstanzung oder durch eine andere an sich bekannte Markierung, wodurch der Längsrapport festgelegt wird. Der Seitenrapport wird im allgemeinen durch die Seitenkantensteuerung eingehalten, um zu verhindern, daß in der darauffolgenden Druckstation entweder auf derselben Maschine, wenn erneut durchgefahren wird, oder in einer anderen Druckstation der zweite Druck nicht seitenrapportgenau aufgesetzt wird.This side edge control therefore has the task of supplying the web of material to the printing unit in an exactly aligned manner, it being provided in particular for maintaining the side repeat. In the case of printing presses with multiple printing stations or job stations in particular, compliance with the side repeat is extremely important. If the first color is applied, the registration mark is preferably entered by punching holes or by another marking known per se, as a result of which the longitudinal repeat is determined. The page repeat is generally adhered to by the side edge control in order to prevent the subsequent printing station either from being placed on the same machine when it is being rerun, or from being printed in a different printing station at a different position from the page repeat.

Die Seitenkantensteuerungen haben aber den Nachteil, daß sie Unruhe in die Bahn bringen und insbesondere die Einhaltung des Längsrapportes dadurch beeinflussen, daß sie die Warenbahn jeweils nach rechts und links, entgegen ihrer Auslaufrichtung transportieren, wodurch sich auch der Längsrapport wieder etwas verändern kann.The side edge controls have the disadvantage, however, that they cause unrest on the web and in particular influence the adherence to the longitudinal repeat by transporting the web to the right and left, counter to the direction in which they run out, which means that the longitudinal repeat can also change somewhat.

Der vorliegenden Erfindung liegt somit die Aufgabe zu Grunde, eine Vorrichtung zu schaffen, mit der es möglich ist den, wenn auch leichten Unruhefaktor durch die Seitenkantensteuerung derart zu eliminieren, daß ein absolut ruhiger gleichmäßiger diskontinuierlicher Zulauf zur Gegendruckwalze gewährleistet ist, wobei nach Beruhigung der Warenbahn der Längsrapport exakt festgelegt bzw. abgelesen wird, so daß die Warenbahn beruhigt und genau der Gegendruckwalze zugeführt wird.The present invention is therefore based on the object to provide a device with which it is possible to eliminate the albeit slight unrest factor by the side edge control in such a way that an absolutely smooth, even, discontinuous feed to the counter-pressure roller is ensured, after the material web has calmed down the longitudinal repeat is precisely determined or read, so that the material web is calmed down and fed precisely to the counter-pressure roller.

Diese Aufgabe wird durch die im Kennzeichen des Anspruches 1 aufgeführten Merkmale gelöst.This object is achieved by the features listed in the characterizing part of claim 1.

Mit der Druckmaschine nach der Erfindung erfolgt durch eine relativ einfache Maßnahme eine vollständige Beruhigung des Zulaufes und exakte Zuführung der Warenbahn zum Gegendruckzylinder, wobei auch gleichzeitig ein erhöhter Seitenverlauf verhindert wird. Da mit der Vorrichtung diskontinuierlich gearbeitet werden soll und somit verstärkt Regelschwingungen in der Seitenführung auftreten, können diese durch die Umlenkungen weitestgehend eliminiert werden.With the printing press according to the invention, the inlet is completely calmed down and the web of goods is fed to the impression cylinder by a relatively simple measure, and an increased lateral profile is also prevented at the same time. As with the If the device is to be operated discontinuously and thus there are increased control vibrations in the lateral guide, these can be largely eliminated by the deflections.

Zweckmäßige Weiterbildung des Gegenstandes nach Anspruch 1, sind in den Unteransprüchen beschrieben.Appropriate development of the subject matter according to claim 1 are described in the subclaims.

Weitere Kennzeichen und Merkmale ergeben sich aus den nachfolgend beschriebenen Ausführungsbeispielen. Es zeigen:

  • Fig. 1 eine Vorrichtung in Seitenansicht,
  • Fig. 2 eine Vorrichtung in Draufsicht, wobei die Druckstation abgenommen ist,
  • Figs. 3 + 4 zwei unterschiedliche Ausführungsbeispiele der Führung der Warenbahn,
  • Fig. 5 eine Seitenkantensteuerung in Draufsicht, schematisiert.
Further characteristics and features result from the exemplary embodiments described below. Show it:
  • 1 shows a device in side view,
  • 2 shows a device in plan view, with the printing station removed,
  • Figs. 3 + 4 two different exemplary embodiments of guiding the material web,
  • Fig. 5 shows a side edge control in plan view, schematized.

In Fig. 1 ist die Vorrichtung schematisch dargestellt. Auf einen Maschinengestell 1 befindet sich im oberen Bereich eine Siebdruckstation 2, bestehend aus einer mit Antrieb versehenen, beweglich geführten Siebschablone 20 und einer, ebenfalls mit üblichen Bewegungsmechanismen versehenen Rakelanordnung 21. Während des Rakelhubes wird die Schablonengaze 120 gegen eine Gegendruckwalze 3 gedrückt, wodurch die Berakelung der im vorliegenden Fall diskontinuierlich geführten Warenbahn 4 möglich ist. Die Warenbahn kommt von einem nicht dargestellten Vorrat über ein Einlaufwerk 5, bestehend aus Tänzerwalze 50 und/oder Vakuumleiste 51 zur Ermöglichung eines Spannungsaufbaues in der Warenbahn. Sowohl die Tänzerwalze 50 als auch die Vakuumleiste 51 halten die Warenbahn zurück, wobei die Tänzerwalze 50 gleichzeitig Regelelement sein kann für die Zugwalze 6, die als Auslaufwalze am gegenüberliegenden Ende der Maschine angeordnet ist. Diese Zugwalze 6 läuft etwas schneller als die übrigen Transportvorrichtungen, so daß sich in der Warenbahn ständig Spannung aufbaut. Sie kann eine höhere Umfangsgeschwindigkeit haben.In Fig. 1 the device is shown schematically. On a machine frame 1 there is a screen printing station 2 in the upper area, consisting of a drive-provided, movably guided screen stencil 20 and a squeegee arrangement 21, also provided with conventional movement mechanisms Scrapering of the web 4 which is carried out discontinuously in the present case is possible. The material web comes from a supply (not shown) via an infeed unit 5, consisting of a dancer roller 50 and / or vacuum strip 51, to enable tension to be built up in the material web. Both the dancer roller 50 and the vacuum bar 51 hold back the web, wherein the dancer roller 50 can also be a control element for the pull roller 6, which is arranged as an outlet roller at the opposite end of the machine. This pull roller 6 runs somewhat faster than the other transport devices, so that tension builds up constantly in the web. It can have a higher peripheral speed.

Nach dem Einlaufwerk 5 liegen ein oder zwei Seitenkantensteuerungen 7, 7', deren Aufbau in Fig. 5 näher beschrieben ist. Eine Zwischenwalze 70 ist zwischen den beiden Seitenkantensteuerungen 7, 7' des Ausführungsbeispieles der Fig. 1 und 2 am Maschinengestell 1 angeordnet. Es genügt auch, eine einzige Seitenkantensteuerung 7 vorzusehen. Die Seitenkantensteuerungen weisen Schwenkrahmen auf, was später beschrieben wird.After the infeed unit 5 there are one or two side edge controls 7, 7 ', the structure of which is described in more detail in FIG. 5. An intermediate roller 70 is arranged between the two side edge controls 7, 7 'of the embodiment of FIGS. 1 and 2 on the machine frame 1. It is also sufficient to provide a single side edge control 7. The side edge controls have swing frames, which will be described later.

Den Seitenkantensteuerungen 7, 7' ist eine erfindungsgemäße Umlenkvorrichtung nachgeordnet. Diese Umlenkvorrichtung besteht aus mindestens zwei, vorzugsweise aber drei Walzen 90, 91, 92, wobei bei den dargestellten Ausführungsbeispielen der Fig. 1 und 3 die Umlenkvorrichtung derart angeordnet ist, daß sich eine Warenbahnschlaufe 40 bildet. Dabei liegen die Umlenkwalzen, die auch Umlenkrollen oder-stangen sein können, derart, daß die in diesem Bereich vorzugsweise vertikal geführte Warenbahn in Warenlaufrichtung zunächst um vorzugsweise 90° nach links durch die Umlenkwalze 90 in die Horizontale abgelenkt wird und danach durch die Umlenkwalze 91 um vorzugsweise 180° zurückgeführt wird und durch die Umlenkwalze 92 wieder um vorzugsweise 90° in die Vertikale abgelenkt wird, so daß sich im Lauf ein U bildet.A deflection device according to the invention is arranged downstream of the side edge controls 7, 7 '. This deflection device consists of at least two, but preferably three, rollers 90, 91, 92, the deflection device being arranged in the exemplary embodiments shown in FIGS. 1 and 3 such that a web loop 40 is formed. The deflection rollers, which can also be deflection rollers or rods, lie in such a way that the web of material, which is preferably guided vertically in this area, is first deflected horizontally by preferably 90 ° to the left by the deflection roller 90 and then by the deflection roller 91 is preferably returned 180 ° and is deflected by the deflecting roller 92 again by preferably 90 ° into the vertical, so that a U is formed in the barrel.

Unmittelbar hinter der Umlenkwalze 92 befindet sich die Gegendruckwalze 3, auf die die Warenbahn 4 tangential aufgeleitet wird. Der Bereich zwischen der Umlenkwalze 92 und der Gegendruckwalze 3 ist so gewählt, daß eine Vorrichtung zur Passermarkierung bzw. -ablesung 8' unmittelbar vor der Gegendruckwalze 3 in Warenlaufrichtung angeordnet werden kann.Immediately behind the deflection roller 92 is the counter-pressure roller 3 onto which the web 4 is tangentially guided. The area between the deflecting roller 92 and the counter-pressure roller 3 is selected so that a device for register marking or reading 8 'can be arranged directly in front of the counter-pressure roller 3 in the direction of travel of the goods.

Diese Umlenkrollen, -walzen oder-stangen können feststehend sein, drehbeweglich gelagert, aber auch angetrieben werden. Es besteht aber auch die Möglichkeit, gemäß der Ausführung der Fig. 3 die Umlenkwalze, -rolle oder -stange 91 als Spannungsregler auszubilden und in den Pfeilrichtungen A beweglich zu lagern.These deflection rollers, rollers or rods can be fixed, rotatably mounted, but can also be driven. However, there is also the possibility, according to the embodiment of FIG. 3, to design the deflecting roller, roller or rod 91 as a voltage regulator and to mount it movably in the arrow directions A.

Die Bezeichnungen "Horizontale" und "Vertikale" sind nicht einschränkend zu verstehen, da die Warenbahnführung etwas aus diesen Ideallagen abweichen kann.The terms "horizontal" and "vertical" are not to be understood as restrictive, since the web guide can deviate somewhat from these ideal positions.

Die Warenbahnführung zwischen einer in die vertikale Warenbahnführung einleitenden Überlaufwalze 77 und der Gegendruckwalze 3 sollte in einer Flucht liegen, die sich als verlängerte, vorzugsweise vertikale Tangente der aufgeleiteten Warenbahn 4 auf die Gegendruckwalze 3 darstellt.The web guide between an overflow roller 77 leading into the vertical web guide and the counter-pressure roller 3 should lie in alignment, which is an elongated, preferably vertical tangent of the conveyed web 4 to the counter-pressure roller 3.

Eine Ablenkung von dieser Fluchtlinie bewirkt lediglich die Umlenkvorrichtung 9, die zur Beruhigung der Warenbahn 4 zwischengeschaltet ist. Vor der Umlenkvorrichtüng 9 kann der Warenbahnführung zugeordnet eine weitere Vorrichtung zur Passermarkierung bzw. -ablesung 8 vorgeschaltet werden, die zur Vorkontrolle dienen kann.A deflection from this escape line only causes the deflection device 9, which is interposed to calm the web 4. In front of the deflecting device 9, a further device for register marking or reading 8 can be connected upstream of the web guide, which device can be used for preliminary checking.

In Fig. 4 ist die Umlenkvorrichtung derart ausgebildet, daß sie nur aus den beiden Walzen 90 und 91 besteht, die wiederum auch Umlenkstangen sein können, wobei die Warenbahn nur im Z geführt zweimal umgelenkt wird. Vorteilhafter ist allerdings die U-Führung, so daß sich eine Warenbahnschlaufe ergibt. Fig. 4 zeigt einen Parallelversatz der Warenbahnführung.In Fig. 4, the deflection device is designed such that it consists only of the two rollers 90 and 91, which in turn can also be deflecting rods, the web being guided twice in the Z only. However, the U-guide is more advantageous, so that there is a web loop. Fig. 4 shows a parallel offset of the web guide.

Die Warenbahnführung zwischen der Überlaufwalze 77 und der Gegendruckwalze 3 liegt bei diesem Beispiel nicht in einer Flucht. Die Warenbahn 4 wird in vertikaler Richtung in Warenlaufrichtung auf die Umlenkwalze, -rolle oder-stange 90 geleitet. Unmittelbar vor der Umlenkwalze 90 kann in der Warenbahnführung die sogenannte Vorrichtung zur Passermarkierung bzw. -ablesung angeordnet werden. Die Umlenkrolle 90 lenkt die Warenbahn 4 um vorzugsweise 90° nach rechts in die Horizontale bis zur Umlenkrolle 91 ab. Durch die Umlenkrolle 91 wird die Warenbahn 4 um vorzugsweise 90° in die Vertikale zurückgeführt und auf die Gegendruckwalze 3 geleitet. Der Bereich zwischen der Umlenkwalze 91 und der Gegendruckwalze 3 ist auch hier so gewählt, daß, wie bei Fig. 1 und 3, eine Vorrichtung zur Passermarkierung bzw. -ablesung 8' unmittelbar vor der Gegendruckwalze 3 in Warenlaufrichtung angeordnet werden kann. Dieser Zwischernraum zwischen der Umlenkvorrichtung und der Gegendruckwalze 3 ist auch hier wieder relativ kurz bemessen, um unmittelbar nach der Beruhigung der Warenbahn durch die Umlenkvorrichtung die Passermarke aufzubringen bzw. abzulesen und dann die Warenbahn sofort auf die Gegendruckwalze aufzubringen.The web guide between the overflow roller 77 and the counter-pressure roller 3 is not in alignment in this example. The web 4 is guided in the vertical direction in the direction of the goods onto the deflecting roller, roll or rod 90. Immediately before the deflection roller 90, the so-called device for register marking or reading can be arranged in the web guide. The deflection roller 90 deflects the web 4 by preferably 90 ° to the right into the horizontal to the deflection roller 91. Through the deflection roller 91, the web 4 is preferably returned to the vertical by 90 ° and passed onto the counter-pressure roller 3. The area between the deflection roller 91 and the counter-pressure roller 3 is also selected here such that, as in FIGS. 1 and 3, a device for registering marking or reading 8 'can be arranged directly in front of the counter-pressure roller 3 in the direction of the goods. This intermediate space between the deflection device and the counter-pressure roller 3 is again dimensioned relatively short in order to apply or read the registration mark immediately after the web has calmed down by the deflection device and then immediately apply the web to the counter-pressure roller.

In den Fig. 2 und 5 sind Ausbildungen der Seitenkantensteuerung dargestellt. In Fig. 2 sind zwei Seitenkantensteuerungen hintereinander geschaltet, und zwar die Seitenkantensteuerungen 7 und 7'.2 and 5 representations of the side edge control are shown. In Fig. 2, two side edge controls are connected in series, namely the side edge controls 7 and 7 '.

Ihre Ausbildung entspricht der Ausführung in Fig. 5. Es handelt sich um einen schwenkbar aufgehängten Rahmen 72. Der Rahmenschwenkpunkt ist mit 73 in der Zeichnung bezeichnet. Es handelt sich um eine vertikal stehende Achse, um die der Rahmen schwenken kann und die im Einlaufbereich der Warenbahn 4 liegt. Die dem Rahmenschwenkpunkt gegenüberliegende Seite trägt Kantenfühler 74, die U-förmig ausgebildet sind und einander gegenüberliegen und die zwischen sich die Warenbahn 4 einschließen. Läuft die Warenbahn nach rechts od. links aus, so erfolgt ein Signal, wodurch ein Verstellmotor eingeschaltet wird, der den gesamten Rahmen verschwenkt. Der Verstellmotor 75 ist fest in der Vorrichtung gelagert und bewirkt die Verschwenkung des Rahmens in den Pfeilrichtungen B und den Rahmenschwenkpunkt 73, wodurch sich die Überlaufwalzen 76, 77 schrägstellen, und zwar jeweils nach rechts oder links ausschwenken, wie es in Fig. 2 gezeigt ist. Dasselbe gilt für die vorgeordnete Seitenkantensteuerung 7', deren Walzen 76' und 77' entsprechend auf dieselbe Art und Weise bewegt werden, weil beide Seitenkantensteuerungen 7 und 7' nach demselben Prinzip ausgebiltdet sind. Diesen sind Kantenfühler 78 od.dgl. zugeordnet.Their design corresponds to the embodiment in Fig. 5. It is a pivotally suspended frame 72. The frame pivot point is designated 73 in the drawing. It is a vertical axis about which the frame can pivot and which is located in the inlet area of the web 4. The side opposite the frame pivot point carries edge sensors 74 which are U-shaped and lie opposite one another and which enclose the web 4 between them. If the web runs to the right or left, a signal is given, whereby an adjustment motor is switched on, which pivots the entire frame. The adjusting motor 75 is fixedly mounted in the device and causes the frame to be pivoted in the direction of the arrow B and the frame pivot point 73, as a result of which the overflow rollers 76, 77 incline, in each case swinging out to the right or left, as shown in FIG. 2 . The same applies to the upstream side edge control 7 ', the rollers 76' and 77 'of which are correspondingly moved in the same way, because both side edge controls 7 and 7' are designed on the same principle. These are edge sensors 78 or the like. assigned.

Wichtig ist, daß die leichte Beunruhigung der Warenbahn, die durch die Rücksteuerung der Seitenkanten wieder in den Normallauf verursacht wird, aufgehoben wird durch die Umlenkvorrichtung 9, die vor der Gegendruckwalze 3 liegt.It is important that the slight disturbance of the web, which is caused by the reverse control of the side edges in normal operation, is removed by the deflection device 9, which lies in front of the counter-pressure roller 3.

Der Gegendruckwalze zugeordnet ist eine abklappbare Andruck- oder Breit-Streckwalze 31, die vorzugsweise durch die Bewegung der Warenbahn 4 mitgenommen wird.Associated with the counterpressure roller is a foldable pressure roller or wide stretching roller 31, which is preferably carried along by the movement of the web 4.

Als Warenbahn kommen die verschiedensten Materialien in Frage, wie Papier, Folie, ggf. auch Übergänge zu Fasermaterial enthaltenden Waren.A wide variety of materials come into consideration as the material web, such as paper, film, and possibly also transitions to goods containing fiber material.

Selbstverständlich ist die Erfindung nicht auf die dargestellten Ausführungsbeispiele beschränkt. Wichtig ist, daß durch die Verlagerung der Warenbahn zur Ausrichtung der Seitenrapportes eine genaue Zuführung der Warenbahn im Längsrapport zur Gegendruckwalze 3 erfolgt und daß hier ein genauer Abstand zum Druckbereich erzeilt wird. Diese kann durch die Vorrichtung zur Passermarkierung bzw. Ablesung 8 erfolgen vor der Umlenkvorrichtung 9 oder durch eine gleiche Vorrichtung zur Passermarkierung bzw. Ablesung im Warenverlauf nach der Umlenkvorrichtung 9 angeordnet, die mit 8' in der Zeichnung bezechnet ist und die somit zwischen der Umlenkvorrichtung 9 und der Gegendruckwalze 3 liegt. Die Placierung im oberen Bereich ist vorteilhafter, weil ein genauerer Abstand zum Druckbild durch eine derart angeordnete obere Fotozelle erzielbar ist. Dieser Abstand spielt insbesondere eine wesentliche Rolle, wenn die Warenbahn bereits im ersten Durchlauf mit Passermarkierungen versehen ist und im zweiten, dritten oder vierten Durchlauf die Passermarken abgelesen werden müssen, um einen ganz exakten, beispielsweise Mehrfarbendruck, zu ermöglichen.Of course, the invention is not limited to the exemplary embodiments shown. It is important that the displacement of the web to align the side repeat results in an accurate feed of the web in the longitudinal repeat to the counter-pressure roller 3 and that a precise distance from the printing area is achieved here. This can be done by the device for register marking or reading 8 in front of the deflection device 9 or by an identical device for register marking or reading in the course of the goods after the deflection device 9, which is denoted by 8 'in the drawing and thus between the deflection device 9 and the counter-pressure roller 3. Placement in the upper area is more advantageous because a more precise distance from the printed image can be achieved by an upper photo cell arranged in this way. This distance plays a particularly important role if the web is already provided with registration marks in the first pass and the registration marks have to be read in the second, third or fourth pass in order to enable a very exact, for example multi-color printing.

Die Anordnung der Umlenkvorrichtung 9 einer Ausgleichswalze bzw. der Anordnung einer Warenbahnschlaufe 40 ist vorteilhafter als die einfach Umlenkung über zwei Umlenkrollen, -walzen oder -stangen 90, 91 jeweils um ca. 90°. Am vorteilhaftesten ist der Einsatz der Umlenkrolle oder Walze 91 als Spannungskontrollrolle oder -walze, wobei sie mit dem Antrieb mindestens einer im Auslaufbereich der Maschine liegenden Zugwalze 6 elektrisch verbunden ist und auf deren Geschwindigkeit einwirkt. Vorteilhaft ist es, wenn die Umlenkrollen oder -walzen 90, 92 direkt übereinanderliegen, die Warenbahnschlaufe somit zwei gleiche Enden hat. Die Umlenkvorrichtung verhindert, daß die Unruhe, die von der Seitenkanten- oder Bahkantensteuerung 7, 7' ausgeht, irgendwie in den Druckbereich gelangt. Vorteilhafterweise arbeitet die Vorrichtung diskontinuerlich. Es wird mit der Vorrichtung eine hohe Passergenauigkeit erzielt:The arrangement of the deflection device 9 of a compensating roller or the arrangement of a web loop 40 is more advantageous than the simple deflection via two deflection rollers, rollers or rods 90, 91 in each case by approximately 90 °. It is most advantageous to use the deflection roller or roller 91 as a tension control roller or roller, it being electrically connected to the drive of at least one pull roller 6 located in the outlet region of the machine and acting on its speed. It is advantageous if the deflecting rollers or rollers 90, 92 lie directly one above the other, so that the web loop has two identical ends. The deflection device prevents the unrest that emanates from the side edge or rail edge control 7, 7 'from somehow reaching the printing area. The device advantageously works discontinuously. A high register accuracy is achieved with the device:

Es sind auch verschiedene Variationen denkbar und möglich hinsichtlich der Anordnung der Passermarkierungsvorrichtungen bzw. der Ablesevorrichtungen. So gibt es z.B. die Möglichkeit, die Vorrichtung zur Passermarkierung bzw. Ablesung 8 zusätzlich zu einer ähnlichen Vorrichtung zur Passermarkierung und Ablesung 8' anzuordnen. Außerdem besteht die Möglichkeit, der Gegendruckwalze 3 zwei Vorrichtungen zur Passermarkierung bzw. zur Passerablesung 8' und 8" zuzuordnen, wie es in den Fig. dargestellt ist. Diese Vorrichtungen werden wechselweise eingesetzt.Various variations are also conceivable and possible with regard to the arrangement of the register marking devices or the reading devices. So there is e.g. the possibility of arranging the device for register marking or reading 8 in addition to a similar device for register marking and reading 8 '. It is also possible to assign two devices for register marking or register reading 8 'and 8 "to the counter-pressure roller 3, as shown in the figures. These devices are used alternately.

Die Anordnung könnte notwendig sein, wenn der Benutzer der Maschine das Material ohne es zwischenzeitlich umzuspulen, erneut durch die Maschine führen will. In diesem Fall liegen dann die Passermarkierungen auf der gegenüberliegenden Seite der Warenbahn, da ja diese rückwärts transportiert wird und im Verhältnis zum jeweiligen Rapport sozusagen diagonal. Demzufolge müssen die beiden Vorrichtungen 8' und 8" derart angeordnet sein und den Seitenkanten der Bahn zugeordnet werden, daß eien der Vorrichtungen, und zwar beispielsweise die Vorrichtung 8' rechtsseitig die Passermarkierungen anbringt oder abliest, und die auf der anderen Seite der Gegendruckwalze 3 liegende Vorrichtung 8" beispielsweise linksseitig der Warenbahn zugeordnet ist. Die Verschiebung in bezug auf die Gegendruckwalze ergibt sich auch aus der Diagonalanordnung der Passermarkierungen des nicht umgespulten Materials.The arrangement could be necessary if the user of the machine wants to pass the material through the machine again without rewinding it. In this case, the registration marks are on the opposite side of the web, since it is transported backwards and diagonally, so to speak, in relation to the respective repeat. Accordingly, the two devices 8 'and 8 "must be arranged and assigned to the side edges of the web in such a way that one of the devices, for example the device 8' on the right side attaches or reads the register marks, and the one on the other side of the counter-pressure roller 3 Device 8 "for example on the left side of the web is not. The shift in relation to the counter-pressure roller also results from the diagonal arrangement of the register marks of the material that is not rewound.

Claims (6)

1. A screen printing machine which operates with an impression cylinder (3), with side edge control means (7, 7'), wherein the screen printing machine is designed to operate in a discontinuous mode and has a means for lay mark marking or reading-off, disposed upstream of the impression cylinder, characterised in that:
-the side edge control means (7, 7') is designed to be pivotable and is provided with lateral edge sensors
-and arranged downstream thereof in the direction of travel of the material is a direction-changing means (9) for the web of material, in which same is guided in a U-shape in a loop configuration (40) or in a web guide path in a Z-shape
- and arranged directly upstream of the impression cylinder (3) and directly downstream of the direction-changing means (9) is the means (8') for lay mark reading and reading-off,
- and the pulling roller (6) in the discharge region of the machine, as viewed in the direction of travel of the material, is arranged downstream of the impression cylinder (3) and is in the form of a roller which moves faster or a roller with a higher peripheral speed, in relation to the impression cylinder (3).
2. A printing machine according to claim 1 characterised in that, as viewed in the direction of travel of the material, arranged upstream of the direction-changing means (9) and/or downstream of the impression cylinder are one or two further respective means (8, 8") for lay mark marking and reading-off.
3. A printing machine according to claim 1 characterised in that the cylinder, roller or rod arrangement of the direction-changing means (9) is such that there are two rolling rollers or rods as a deflection means (90, 92) and a roller as a compensating roller (91), which is preferably driven and which at the same time is in the form of a tension control roller or tension regulator and is electrically connected to the drive of at least one pulling roller (6) arranged in the discharge region of the machine.
4. A printing machine according to claim 1 and one of the following claims characterised in that two side edge control means (7, 7') are arranged upstream of the direction-changing means (9).
5. A printing machine according to claim 1 and one or more of the following claims characterised in that in the region of the direction-changing means (9) the delivery and removal of the web of material extends vertically or substantially vertically as far as the impression cylinder (3) and feeds vertically or substantially vertically to the impression cylinder (3) and is passed around same until it goes away to the puller roller (6).
6. A printing machine according to claim 1 and one or more of the following claims characterised in that the vertical or substantially vertical portions in the path of movement of the web of material present parallel offset in the region of the direction-changing means (9).
EP84101851A 1983-02-23 1984-02-22 Printing machine with a pressure cylinder, in particular a screen printer Expired - Lifetime EP0123049B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3306241 1983-02-23
DE3306241A DE3306241A1 (en) 1983-02-23 1983-02-23 PRINTING MACHINE WORKING WITH COUNTERPRESS ROLLER, PREFERABLY SCREENPRINTING MACHINE

Publications (3)

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EP0123049A2 EP0123049A2 (en) 1984-10-31
EP0123049A3 EP0123049A3 (en) 1985-12-27
EP0123049B1 true EP0123049B1 (en) 1990-05-16

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Application Number Title Priority Date Filing Date
EP84101851A Expired - Lifetime EP0123049B1 (en) 1983-02-23 1984-02-22 Printing machine with a pressure cylinder, in particular a screen printer

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DE (2) DE3306241A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3719059C2 (en) * 1987-06-06 1994-02-24 Gerhard Klemm Screen printing machine for printing on a web

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB573119A (en) * 1942-10-17 1945-11-07 Goss Printing Press Co Ltd Improvements in or relating to web guiding mechanism
US2522479A (en) * 1946-09-27 1950-09-12 Goss Printing Press Co Ltd Registration control device
GB637136A (en) * 1946-11-21 1950-05-10 Goss Printing Press Co Ltd Improvements in registration control devices
GB668205A (en) * 1948-09-25 1952-03-12 Westinghouse Electric Int Co Improvements in or relating to scanning devices for register regulation
AT178341B (en) * 1950-07-25 1954-04-26 Konrad Dr Ing Prett Film printing machine
DE1053529B (en) * 1957-01-31 1959-03-26 Albert Schnellpressen Paper web tension regulator on rotary printing machines
US3329087A (en) * 1964-11-30 1967-07-04 Huck Regulation of repetitive pattern repeat length on a web
US3525858A (en) * 1967-05-09 1970-08-25 Hurletron Inc Web register control apparatus responsive to web speed and register error
CH516460A (en) * 1969-12-15 1971-12-15 Ciba Geigy Ag Device for tape control
IT956921B (en) * 1972-06-28 1973-10-10 Brasa Umberto SYSTEM FOR THE AUTOMATIC REGISTRATION OF PAPER TAPE ON CYLINDER IN SERIGRAPHY PRINTING IN MULTI COLOR PARTS
DE2314045A1 (en) * 1973-03-21 1974-10-10 Charles E Gunst EQUIPMENT ON RAILWAY MACHINES FOR MEASURING THE LENGTH AND DETECTING CHANGES IN LENGTH ON THE CURRENT TRAIL
DE2329177C2 (en) * 1973-06-07 1982-07-29 Windmöller & Hölscher, 4540 Lengerich Device for matching in register of rolls or pairs of rolls engaging a moving material web at a distance from one another with marks provided on this web
DE2425693A1 (en) * 1974-05-28 1975-12-11 Black James Web esp in screen printing machine - is registered by being pulled temporarily into oblique position
DE2810690A1 (en) * 1978-03-11 1979-09-20 Kammann Maschf Werner SCREEN PRINTING METHOD AND DEVICE FOR IMPLEMENTING IT
US4201132A (en) * 1978-04-28 1980-05-06 Maschinenfabrik Peter Zimmer Aktiengesellschaft Method of an apparatus for equalizing longitudinal stresses in an advancing web
DE3136175A1 (en) * 1981-09-12 1983-03-31 Gerhard Ing.(grad.) 4800 Bielefeld Klemm "PRINTING MACHINE WORKING WITH COUNTERPRINT CYLINDER"

Also Published As

Publication number Publication date
DE3482251D1 (en) 1990-06-21
DE3306241A1 (en) 1984-08-23
EP0123049A2 (en) 1984-10-31
EP0123049A3 (en) 1985-12-27

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