EP0318853B1 - Apparatus for avoiding damage to machines - Google Patents

Apparatus for avoiding damage to machines Download PDF

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Publication number
EP0318853B1
EP0318853B1 EP88119646A EP88119646A EP0318853B1 EP 0318853 B1 EP0318853 B1 EP 0318853B1 EP 88119646 A EP88119646 A EP 88119646A EP 88119646 A EP88119646 A EP 88119646A EP 0318853 B1 EP0318853 B1 EP 0318853B1
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EP
European Patent Office
Prior art keywords
web
switch
tear
switches
rail
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
EP88119646A
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German (de)
French (fr)
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EP0318853A3 (en
EP0318853A2 (en
Inventor
Werner J. Kotterer
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Grafotec Kotterer GmbH
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Grafotec Kotterer GmbH
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/18—Web break detection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/04—Tripping devices or stop-motions
    • B41F33/06—Tripping devices or stop-motions for starting or stopping operation of sheet or web feed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/16—Programming systems for automatic control of sequence of operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H26/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms
    • B65H26/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms responsive to presence of irregularities in running webs
    • B65H26/025—Warning or safety devices, e.g. automatic fault detectors, stop-motions, for web-advancing mechanisms responsive to presence of irregularities in running webs responsive to web breakage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41P—INDEXING SCHEME RELATING TO PRINTING, LINING MACHINES, TYPEWRITERS, AND TO STAMPS
    • B41P2233/00—Arrangements for the operation of printing presses
    • B41P2233/20—Safety devices preventing damage
    • B41P2233/21—Safety devices preventing damage by cutting the web in case of web break

Definitions

  • Device for preventing machine damage in web-fed rotary printing presses with at least one web clamping and / or separating device which is arranged after a printing unit, preferably with a web slot and / or separating device which is arranged in the region between the last printing unit and a downstream dryer and can be actuated by means of a web scanning device which detects a web break.
  • the web must be quickly clamped and / or cut to avoid machine damage. In the other cases, this is not necessary and only requires a renewed web feed from the trimming point and a renewed preparation of the web clamping and / or cutting device.
  • the web clamping and / or separating device is activated in any case, ie without differentiating between the risk of winding and the absence of danger. The known arrangement therefore proves to be not user-friendly enough.
  • the web scanning device contains at least one web break switch responsive to web contact, which with the associated web clamping and / or separating device is assembled and is arranged in this at a distance from the transport plane of the web which is valid during trouble-free operation at a point at which, in the event of a web break, an angular deflection of the web takes place caused by a cylinder carrying the tension-free web .
  • the angular deflection of the web that necessarily precedes a winder is advantageously used to activate the web clamping and / or cutting device.
  • the measures according to the invention therefore ensure that the web clamping and / or separating device is not activated in the event of each web break, but only if the web undergoes an angular deflection as a result of the web break, ie if there is really a risk of a winder. Unnecessary knocking off of the paper web is therefore avoided, which results in a high level of user friendliness. In addition, the response times are comparatively short.
  • web break switches that are approximately opposite each other can be provided with respect to the paper web. This makes it unnecessary to determine a preferred deflection direction of the web and thus ensures a particularly high level of safety.
  • a further advantageous embodiment can consist in that the web break switch or switches have a mechanical push-button that can be deflected from the web and that is designed as a bar that extends over the entire working width and rests against a stop in its rest position and is lifted off from the stop Position actuated a control body.
  • Figures 1 and 2 each show the last printing unit 1 of a web-fed rotary printing press in which a paper web 2 is printed.
  • the printed web 2 runs into a dryer 3 downstream of the printing press, in which the drying air is applied to the web 2. Due to the strong thermal stress on the web 2 in the area of the dryer, this represents a danger zone with regard to the occurrence of web breaks.
  • the printing ink transferred to the web 2 has strong adhesion properties, particularly in the case of offset printing.
  • the web 2 is pulled off the rubber cylinders 4 in the case of an offset printing machine, contrary to the adhesion caused by the color, from the cylinders interacting with the web 2.
  • the web tension is omitted, with the result that the web 2 sticks to one of the cylinders 4 that it passes and rolls on one another remains, which can lead to a winder. This is preceded by a deflection of the path 2 shown in the drawing with dashed lines.
  • a web clamping and / or separating device 5 is provided in the area between the last printing unit 1 and the dryer 3, which is provided with clamping jaws 6 and / or knives 7 which can be moved relative to one another and which are indicated as a dashed line Deflection of web 2 is activated. With the help of this device 5, the web 2 is clamped or severed so that it cannot be retrieved from the dryer 3 by the cylinder 4 which carries it.
  • the device 5 is received on a bracket 9 attached to the inlet side of the dryer 3 and arranged so that its through-slot 9 is located in front of the inlet slot 10 of the dryer 3.
  • the paper web 2 runs through the through slot 9 without contact.
  • the deflection of the path 2, indicated by dashed lines, can take place in one or the other direction in the embodiment according to FIG. 1, in which the cylinders 4 interacting with the path 2 have no significant mutual displacement.
  • the web break switches 11 are seated in the region of the upper and lower edges of the inlet cross section of the through slot 9.
  • the opposing web break switches 11 are designed as capacitive switches, the force field of which is influenced by a change in the transport plane of the web 2 which occurs in the event of a deflection of the web 2. In the event of a deflection of the web 2 down, the lower web break switch 11 switches, and vice versa.
  • the opposing switches 11 are accordingly linked together by an OR gate.
  • the capacitive switches used are directionally insensitive, so that the same elements can be used for the upper and lower switches.
  • the accommodation of the web break switch 11 in associated chambers of the housing 12 of the web clamping and / or separating device 5 also provides protection of the switch 11 against impact and dirt so that negative effects of any paint mist present in the air, the strength of which to the dryer 3 anyway decreases, are switched off.
  • the web clamping and / or separating device 5 is located at the outlet of the printing unit 1.
  • the web break switch 13 is designed as a push button switch which can be mechanically actuated by the web 2 which experiences a deflection.
  • the rubber cylinders interacting with the web 2 are offset relatively far from one another in order to achieve the largest possible web wrapping, so that the web 2 runs from the upper rubber cylinder 4 much later than from the lower rubber cylinder 4.
  • the mechanical paper tear switch 13 contains, as can best be seen from FIG. 3, a bar 14 which extends over the entire working width of the printing unit 1 and is accommodated in a housing 15 and can be extended as far as it will go.
  • the strip 14 is provided with two oblong holes 16 running perpendicular to the plane of the paper web 2, through which each a housing-fixed stop pin 17 passes through.
  • the housing 15, which is attached here to the housing 12 of the web clamping and / or separating device 5, has an approximately U-shaped cross section, so that due to the side legs of the housing connected by the stop pins 17, reliable guiding of the bar 14 results.
  • the end faces of the housing can be closed by closing plates.
  • the downward movement of the strip 14 here can take place by gravity.
  • the extension movement is supported by two extension springs 18 acting on the rear of the strip.
  • these are very light springs, so that the bar 14 can be raised against the force of gravity and the spring force by the paper web 2 which experiences a deflection in the event of a web break.
  • the strip 14 is made of plastic and therefore proves to be self-lubricating and corrosion-proof and therefore easy to care for. Since the bar 14 can be given a comparatively large running clearance, 15 large tolerances can be permitted in the manufacture of the housing.
  • a switching pin 19 of a control valve 20 placed on the housing 15 projects into the housing 15 from above and is arranged in the power supply line 21 leading to the drive devices of the web clamping and / or disconnecting device 15.
  • the drive device can consist of compressed air cylinders which are actuated with compressed air present at the control valve 20.
  • the Switch pin 19 is arranged so that it can be pressed through the back of the bar 14.
  • the web 2 runs without contact past the underside of the bar 14, which has been extended out of the associated housing 15 as far as it will go, as well as the clamping and cutting elements in the form of the jaws 6, knives 7, which are moved apart from one another in the waiting position.
  • the bar 14 is lifted from the deflected web, the switching pin 19 running onto the back of the bar and being pressed.
  • the valve 20 is set to pass, whereby the clamping and cutting members in the form of the jaws 6 and knife 7 come into mutual engagement.
  • a switch 22 which can also be actuated by means of the switching pin 19, is attached to the valve 20 and is arranged in a control line 23 for stopping the machine main drive.
  • the entire structural unit formed by the web clamping and / or disconnecting device 5 together with the attached web tear switch 13 and attached control devices in the form of the valve 20 and the switch 22, which here ensure a reliable mechanical actuation of the web tear switch 5 in the area of the output of the printing unit 1 is arranged, can be swiveled up at one end about an approximately horizontal axis 24 to ensure good access to the printing unit cylinders mounted on a printing unit side wall, as can best be seen from FIG. 3.
  • a stop 25 arranged below the axis 24 can be provided.

Landscapes

  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Mechanisms For Operating Contacts (AREA)

Description

Vorrichtung zum Verhindern von Maschinenschäden bei Rollenrotationsdruckmaschinen mit wenigstens einer nach einem Druckwerk angeordneten, vorzugsweise mit einer im Bereich zwischen dem letzten Druckwerk und einem nachgeordneten Trockner angeordneten, einen Durchlaufschlitz aufweisenden Bahnklemm- und/oder Trenneinrichtung, die mittels einer einen Bahnriß erkennenden Bahnabtasteinrichtung betätigbar ist.Device for preventing machine damage in web-fed rotary printing presses with at least one web clamping and / or separating device which is arranged after a printing unit, preferably with a web slot and / or separating device which is arranged in the region between the last printing unit and a downstream dryer and can be actuated by means of a web scanning device which detects a web break.

Eine Anordnung dieser Art ist aus der DE-OS 3431686 bekannt. Bei dieser bekannten Anordnung wird die an den Trockner angebaute Klemmeinrichtung durch einen im Bereich hinter dem Trockner bzw. hinter der dem Trockner nachgeordneten Kühleinrichtung angeordneten Papierreißschalter aktiviert. Dieser Plazierungsbereich für den Papierreißschalter stellt zwar einen gefährdeten Bereich hinsichtlich des Auftretens von Bahnrissen dar. Jedoch nicht jeder Bahnriß muß zwangsläufig zu einem Wickler und damit zu der Gefahr eines Maschinenschadens führen. Diese Gefahr besteht nur, wenn die infolge des Risses spannungslos gewordene Papierbahn aufgrund der Adhäsionswirkung der Farbe an einem Farbe auf sie übertragenden Druckwerkszylinder, im Falle einer Offsetdruckmaschine an einem Gummizylinder, haften bleibt und von diesem mitgenommen wird. In einem derartigen Fall muß aber die Bahn zur Vermeidung von Maschinenschäden schnell geklemmt und/oder gekappt werden. In den anderen Fällen ist dies nicht erforderlich und macht lediglich einen erneuten Bahneinzug ab der Kappstelle und ein erneutes Herrichten der Bahnklemm- und/oder -trenneinrichtung erforderlich. Bei der bekannten Anordnung mit einem dem Trockner nachgeordneten Papierreißschalter wird die Bahnklemm- und/oder -trenneinrichtung in jedem Falle, d.h. ohne Unterscheidung zwischen Wicklergefahr und Gefahrlosigkeit, aktiviert. Die bekannte Anordnung erweist sich demnach als nicht bedienungsfreundlich genug. Hinzu kommt, daß eine Abtastung der Bahn im Bereich hinter dem Trockner, wobei in der Regel ein die Bahn mechanisch abtastender Schleifschuh Verwendung findet, eine sehr lange Reaktionszeit ergibt, so daß im Falle wirklicher Gefahr im Verzuge die erforderliche Aktivierung der Bahnklemm- und/oder -trenneinrichtung vielfach zu spät kommt. Die bekannte Anordnung erweist sich demnach auch nicht als sicher und zuverlässig genug.An arrangement of this type is known from DE-OS 3431686. In this known arrangement, the clamping device attached to the dryer is activated by a paper tear switch arranged in the area behind the dryer or behind the cooling device downstream of the dryer. This placement area for the paper tear switch represents a vulnerable area with regard to the occurrence of web breaks. However, not every web break necessarily leads to a winder and thus to the risk of machine damage. This danger only exists if the paper web, which has become tensionless as a result of the tear, due to the adhesive effect of the ink on a printing unit cylinder transferring it to ink, in the case of an offset printing machine sticks to a rubber cylinder and is carried by it. In such a case, however, the web must be quickly clamped and / or cut to avoid machine damage. In the other cases, this is not necessary and only requires a renewed web feed from the trimming point and a renewed preparation of the web clamping and / or cutting device. In the known arrangement with a paper tear switch arranged downstream of the dryer, the web clamping and / or separating device is activated in any case, ie without differentiating between the risk of winding and the absence of danger. The known arrangement therefore proves to be not user-friendly enough. In addition, scanning the web in the area behind the dryer, usually using a grinding shoe that mechanically scans the web, results in a very long reaction time, so that in the event of real danger the required activation of the web clamping and / or separation device often comes too late. The known arrangement therefore does not prove to be safe and reliable enough.

Hiervon ausgehend ist es daher die Aufgabe der vorliegenden Erfindung, unter Vermeidung der Nachteile der bekannten Anordnungen eine Vorrichtung eingangs erwähnter Art mit einfachen und kostengünstigen Mitteln so zu verbessern, daß eine hohe Bedienungsfreundlichkeit sowie eine hohe Sicherheit und Zuverlässigkeit erreicht werden.Proceeding from this, it is therefore the object of the present invention, while avoiding the disadvantages of the known arrangements, to improve a device of the type mentioned at the beginning with simple and inexpensive means in such a way that a high level of user-friendliness as well as a high level of safety and reliability are achieved.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Bahnabtasteinrichtung wenigstens einen auf Bahnberührung ansprechenden Bahnreißschalter enthält, der mit der zugeordneten Bahnklemm- und/oder -trennvorrichtung zusammengebaut ist und in dieser mit Abstand gegenüber der bei störungslosem Betrieb geltenden Transportebene der Bahn an einer Stelle angeordnet ist, an der im Falle eines Bahnrisses eine von einem die spannungslose Bahn mitnehmenden Zylinder bewirkte Winkelauslenkung der Bahn stattfindet.This object is achieved in that the web scanning device contains at least one web break switch responsive to web contact, which with the associated web clamping and / or separating device is assembled and is arranged in this at a distance from the transport plane of the web which is valid during trouble-free operation at a point at which, in the event of a web break, an angular deflection of the web takes place caused by a cylinder carrying the tension-free web .

Hierbei wird in vorteilhafter Weise die einem Wickler zwangsläufig vorangehende Winkelauslenkung der Bahn zur Aktivierung der Bahnklemm- und/oder -trenneinrichtung benutzt. Die erfindungsgemäßen Maßnahmen stellen daher sicher, daß nicht im Falle jedes Bahnrisses eine Aktivierung der Bahnklemm- und/oder -trenneinrichtung erfolgt, sondern nur dann, wenn die Bahn infolge des Bahnrisses eine Winkelauslenkung erfährt, d.h. wenn wirklich eine Wicklergefahr droht. Ein unnötiges Abschlagen der Papierbahn wird daher vermieden, was eine hohe Bedienungsfreundlichkeit ergibt. Hinzu kommt, daß sich vergleichsweise kurze Reaktionszeiten ergeben. In diesem Zusammenhang ist nämlich davon auszugehen, daß, wenn es zu einer Mitnahme der Papierbahn, d.h. zu einer Winkelauslenkung der Papierbahn, kommt, es schon im Verlauf des Reißens der Papierbahn bzw. unmittelbar danach dazu kommt. Der erfindungsgemäße Papierreißschalter kann daher bereits reagieren, wenn ein nach dem Trockner vorgesehener Schleifschuh etc. noch gar nicht reagieren könnte. Ein weiterer Vorteil der erfindungsgemäßen Maßnahmen ist darin zu sehen, daß hier bei störungsfreiem Betrieb berührungslos von der Bahn passierte Bahnreißschalter Verwendung finden können, die infolge ihrer Berührungsempfindlichkeit in vorteilhafter Weise auch unempfindlich gegen Verschmutzung sind. Die erfindungsgemäßen Maßnahmen ergeben ferner eine kompakte Baueinheit, die in vorteilhafter Weise komplett vormontierbar ist. Infolge der Integration der Bahnreißschalter in die Bahnklemm- und/oder -trenneinrichtung bleibt zudem eine gute Zugänglichkeit der Druckmaschine gewährleistet, was sich vorteilhaft auf die Bedienungsfreundlichkeit auswirkt. Ein weiterer Vorteil ist darin zu sehen, daß die Integration der Bahnreißschalter in die Bahnklemm- und/oder -trenneinrichtung auch automatisch zu einem Schutzgehäuse für die Bahnreißschalter führt. Diese können daher in vorteilhafter Weise als empfindliche, nicht mechanische Elemente, z.B. kapazitive Schalter, ausgebildet sein, die der Bahn keinerlei Widerstand entgegensetzen.In this case, the angular deflection of the web that necessarily precedes a winder is advantageously used to activate the web clamping and / or cutting device. The measures according to the invention therefore ensure that the web clamping and / or separating device is not activated in the event of each web break, but only if the web undergoes an angular deflection as a result of the web break, ie if there is really a risk of a winder. Unnecessary knocking off of the paper web is therefore avoided, which results in a high level of user friendliness. In addition, the response times are comparatively short. In this context it can be assumed that if the paper web is entrained, that is to say an angular deflection of the paper web, this will occur as soon as the paper web is torn or immediately thereafter. The paper tear switch according to the invention can therefore already react if a grinding shoe etc. provided after the dryer could not react at all. Another advantage of the measures according to the invention can be seen in the fact that here, in the case of trouble-free operation, web break switches passed without contact by the web can be used which, due to their sensitivity to touch, are advantageously also insensitive are against pollution. The measures according to the invention also result in a compact structural unit which can advantageously be completely preassembled. As a result of the integration of the web break switch in the web clamping and / or separating device, good accessibility of the printing press also remains guaranteed, which has an advantageous effect on the ease of use. Another advantage can be seen in the fact that the integration of the web break switch in the web clamping and / or disconnecting device also automatically leads to a protective housing for the web break switch. These can therefore advantageously be designed as sensitive, non-mechanical elements, for example capacitive switches, which do not offer any resistance to the web.

In vorteilhafter Weiterbildung der übergeordneten Maßnahmen können bezüglich der Papierbahn einander etwa gegenüberliegende Bahnreißschalter vorgesehen sein. Dies macht die Festlegung einer bevorzugten Auslenkrichtung der Bahn entbehrlich und gewährleistet somit eine besonders hohe Sicherheit.In an advantageous development of the higher-level measures, web break switches that are approximately opposite each other can be provided with respect to the paper web. This makes it unnecessary to determine a preferred deflection direction of the web and thus ensures a particularly high level of safety.

Eine weitere vorteilhafte Ausführung kann darin bestehen, daß der bzw. die Bahnreißschalter einen von der Bahn auslenkbaren, mechanischen Taster aufweisen, der als über die ganze Arbeitsbreite sich erstreckende Leiste ausgebildet ist, die in ihrer Ruheposition an einem Anschlag anliegt und in einer vom Anschlag abgehobenen Stellung ein Steuerorgan betätigt. Diese Maßnahmen ergeben in vorteilhafter Weise einen mechanischen Schalter, der aber bei störungsfreiem Betrieb dennoch von der Bahn berührungslos passiert wird. Ein derartiger Schalter ist in vorteilhafter Weise völlig stoß- und verschmutzungsunempfindlich und arbeitet dennoch berührungslos. Ein derartiger Bahnreißschalter kann daher in vorteilhafter Weise auch ganz in der Nähe eines Druckwerks positioniert sein, ohne daß der dabei nicht vermeidbare Farbnebel die Wirksamkeit beeinträchtigen könnte. Ein weiterer Vorteil ist darin zu sehen, daß infolge der über die ganze Breite reichenden Länge der Leiste jeder Einstellungsaufwand entfällt.A further advantageous embodiment can consist in that the web break switch or switches have a mechanical push-button that can be deflected from the web and that is designed as a bar that extends over the entire working width and rests against a stop in its rest position and is lifted off from the stop Position actuated a control body. These measures advantageously result in a mechanical switch, which is nevertheless passed by the web in a contactless manner in the case of trouble-free operation. Such a switch is advantageously completely insensitive to impacts and dirt and still works without contact. Such a web break switch can therefore advantageously be positioned very close to a printing unit, without the ink mist which cannot be avoided thereby impairing the effectiveness. Another advantage is that due to the length of the bar extending over the entire width, any adjustment effort is eliminated.

Weitere vorteilhafte Ausgestaltungen und zweckmäßige Fortbildungen der übergeordneten Maßnahmen ergeben sich aus der nachstehenden Beschreibung einiger Ausführungsbeispiele anhand der Zeichnung in Verbindung mit den restlichen Unteransprüchen.Further advantageous refinements and expedient further developments of the superordinate measures result from the following description of some exemplary embodiments with reference to the drawing in conjunction with the remaining subclaims.

In der Zeichnung zeigen:

Figur 1
eine Seitenansicht eines Beispiels mit kapaziti-ven Bahnreißschaltern,
Figur 2
eine Seitenansicht eines Beispiels mit einem mechansichen Bahnreißschalter und
Figur 3
einen Längsschnitt durch den mechanischen Bahnreißschalter gemäß Figur 2.

The drawing shows:
Figure 1
a side view of an example with capacitive web break switches,
Figure 2
a side view of an example with a mechanical web break switch and
Figure 3
a longitudinal section through the mechanical web break switch according to Figure 2.

Die Figuren 1 und 2 lassen jeweils das letzte Druckwerk 1 einer Rollenrotationsdruckmaschine erkennen, in welcher eine Papierbahn 2 bedruckt wird. Die bedruckte Bahn 2 läuft in einen der Druckmaschine nachgeordneten Trockner 3 ein, in welchem die Bahn 2 mit Trocknungsluft beaufschlagt wird. Infolge der starken thermischen Beanspruchung der Bahn 2 im Bereich des Trockners stellt dieser eine Gefahrzone hinsichtlich des Auftretens von Bahnrissen dar.Figures 1 and 2 each show the last printing unit 1 of a web-fed rotary printing press in which a paper web 2 is printed. The printed web 2 runs into a dryer 3 downstream of the printing press, in which the drying air is applied to the web 2. Due to the strong thermal stress on the web 2 in the area of the dryer, this represents a danger zone with regard to the occurrence of web breaks.

Die auf die Bahn 2 übertragene Druckfarbe besitzt, insbesondere im Falle von Offsetdruck, starke Adhäsionseigenschaften. Bei störungsfreiem Betrieb wird die Bahn 2 infolge des Bahnzugs entgegen der von der Farbe bewirkten Haftung von den mit der Bahn 2 zusammenwirkenden Zylindern, im Falle einer Offsetdruckmaschine den Gummizylindern 4 abgezogen. Im Falle eines Bahnrisses im rissgefährdeten Trocknerbereich entfällt der Bahnzug, was zur Folge hat, daß die Bahn 2 an einem der von ihr passierten, aufeinander abrollenden Zylinder 4 kleben bleibt, was zu einem Wickler führen kann. Dem geht eine in der Zeichnung mit gestrichelten Linien dargestellte Auslenkung der Bahn 2 voran.The printing ink transferred to the web 2 has strong adhesion properties, particularly in the case of offset printing. In the case of trouble-free operation, the web 2 is pulled off the rubber cylinders 4 in the case of an offset printing machine, contrary to the adhesion caused by the color, from the cylinders interacting with the web 2. In the event of a web break in the dryer area at risk of cracking, the web tension is omitted, with the result that the web 2 sticks to one of the cylinders 4 that it passes and rolls on one another remains, which can lead to a winder. This is preceded by a deflection of the path 2 shown in the drawing with dashed lines.

Um dabei Maschinenschäden zu vermeiden, ist im Bereich zwischen den letztem Druckwerk 1 und dem Trockner 3 eine Bahnklemm- und/oder -Trenneinrichtung 5 vorgesehen, die mit gegeneinander bewegbaren Klemmbacken 6 und/oder Abschlagmessern 7 versehen ist und die in Abhängigkeit von der gestrichelt angedeuteten Auslenkung der Bahn 2 aktiviert wird. Mit Hilfe dieser Einrichtung 5 wird die Bahn 2 geklemmt bzw. durchtrennt, so daß sie von dem sie mitnehmenden Zylinder 4 nicht aus dem Trockner 3 zurückgeholt werden kann.In order to avoid machine damage, a web clamping and / or separating device 5 is provided in the area between the last printing unit 1 and the dryer 3, which is provided with clamping jaws 6 and / or knives 7 which can be moved relative to one another and which are indicated as a dashed line Deflection of web 2 is activated. With the help of this device 5, the web 2 is clamped or severed so that it cannot be retrieved from the dryer 3 by the cylinder 4 which carries it.

Bei der Ausführung gemäß Figur 1 ist die Einrichtung 5 auf einer an der Eingangsseite des Trockner 3 angebrachten Konsole 9 aufgenommen und so angeordnet, daß sich ihr Durchlaufschlitz 9 vor dem Einlaßschlitz 10 des Trockners 3 befindet. Bei störungsfreiem, in Figur 1 mit einer durchgezogenen Linie angedeutem Betrieb läuft die Papierbahn 2 berührungslos durch den Durchlaufschlitz 9 hindurch. Die mit gestrichelten Linien angedeutete Auslenkung der Bahn 2 kann bei der Ausführung gemäß Figur 1, bei der die mit der Bahn 2 zusammenwirkenden Zylinder 4 keine nennenswerte gegenseitige Versetzung aufweisen, in der einen oder anderen Richtung erfolgen. Um die Auslenkung in jedem Falle zuverlässig zu erfassen, sind daher im vorliegenden Beispiel zwei bezüglich des eine Auslenkung erfahrenden Bahntrums zwischen Druckwerk 1 und Trockner 3 einander gegenüberliegende Bahnreißschalter 11 vorgesehen. Diese sind hier in das Gehäuse der Bahnklemm- und/oder -Trenneinrichtung 5 integriert. Beim dargestellten Ausführungsbeispiel sitzen die Bahnreißschalter 11 im Bereich der oberen und unteren Kante des Einlaufquerschnitts des Durchlaufschlitzes 9.In the embodiment according to FIG. 1, the device 5 is received on a bracket 9 attached to the inlet side of the dryer 3 and arranged so that its through-slot 9 is located in front of the inlet slot 10 of the dryer 3. In the case of trouble-free operation, indicated by a solid line in FIG. 1, the paper web 2 runs through the through slot 9 without contact. The deflection of the path 2, indicated by dashed lines, can take place in one or the other direction in the embodiment according to FIG. 1, in which the cylinders 4 interacting with the path 2 have no significant mutual displacement. In order to reliably detect the deflection in any case, in the present example there are two web break switches opposite one another with respect to the web strand experiencing a deflection between printing unit 1 and dryer 3 11 provided. These are integrated in the housing of the web clamping and / or separating device 5 here. In the exemplary embodiment shown, the web break switches 11 are seated in the region of the upper and lower edges of the inlet cross section of the through slot 9.

Die einander gegenüberliegenden Bahnreißschalter 11 sind als kapaziti-ve Schalter ausgebildet, deren Kraftfeld durch eine im Falle einer Auslenkung der Bahn 2 sich ergebende Änderung der Transportebene der Bahn 2 beeinflußt wird. Im Falle einer Auslenkung der Bahn 2 nach unten schaltet der untere Bahnreißschalter 11, und umgekehrt. Die einander gegenüberliegenden Schalter 11 sind dementsprechend durch ein Or-Gatter miteinander verknüpft. Die verwendeten kapaziti-ven Schalter sind richtungsunempfindlich, so daß für den oberen und unteren Schalter gleiche Elemente Verwendung finden können. Die Unterbringung der Bahnreißschalter 11 in zugeordneten Kammern des Gehäuses 12 der Bahnklemm- und/oder -Trenneinrichtung 5 ergibt auch einen Schutz der Schalter 11 vor Stoß- und Schmutzbeaufschlagung so daß negative Auswirkungen eventuell in der Luft vorhandener Farbnebel, deren Stärke zum Trockner 3 hin ohnehin abnimmt, ausgeschaltet sind.The opposing web break switches 11 are designed as capacitive switches, the force field of which is influenced by a change in the transport plane of the web 2 which occurs in the event of a deflection of the web 2. In the event of a deflection of the web 2 down, the lower web break switch 11 switches, and vice versa. The opposing switches 11 are accordingly linked together by an OR gate. The capacitive switches used are directionally insensitive, so that the same elements can be used for the upper and lower switches. The accommodation of the web break switch 11 in associated chambers of the housing 12 of the web clamping and / or separating device 5 also provides protection of the switch 11 against impact and dirt so that negative effects of any paint mist present in the air, the strength of which to the dryer 3 anyway decreases, are switched off.

Bei dem der Figur 2 zugrundeliegenden Beispiel befindet sich die Bahnklemm- und/oder -Trenneinrichtung 5 am Ausgang des Druckwerks 1. Hinsichtlich des prinzipiellen Aufbaus der Bahnklemm- und/oder -Trenneinrichtung 5 kann auf die obigen Ausführungen Bezug genommen werden. Zur Vermeidung jeder Art von Schmutzempfindlichkeit eines hier mit der Bahnklemm- und/oder -Trenneinrichtung ebenfalls zu einer Baueinheit zusammengefaßten Bahnreißschalters 13 ist dieser als von der eine Auslenkung erfahrenden Bahn 2 mechanisch betätigbarer Drückerschalter ausgebildet. Bei der Ausführung gemäß Figur 2 sind die mit der Bahn 2 zusammenwirkenden Gummizylinder zur Erzielung einer möglichst großen Bahnumschlingung verhältnismäßig weit gegeneinander versetzt, so daß die Bahn 2 vom oberen Gummizylinder 4 wesentlich später abläuft als vom unteren Gummizylinder 4. Bei einer derartigen Zylinderkonfiguration erfolgt die Auslenkung der Bahn 2 im Falle eines Bahnrisses erfahrungsgemäß zur Seite des von der Bahn 2 zuletzt verlassenen Zylinders 4 hin. Bei der Ausführung gemäß Figur 2 genügt daher ein oberhalb der Bahn 2 angeordneter Bahnreißschalter 13. Dieser an die am Bereich des Druckwerksausgangs angeordnete Bahnklemm- und/oder -Trenneinrichtung 5 angebaute Bahnreißschalter 13 befindet sich in unmittelbarer Nachbarschaft des im Falle eines Bahnrisses die Bahn 2 auslenkenden Zylinders 4 und damit im Bereich der stärksten Bahnauslenkung, so daß trotz der mechanischen Wirkungsweise des hier vorgesehenen Bahnreißschalters 13 eine zuverlässige Schalterbetätigung erfolgt.In the example on which FIG. 2 is based, the web clamping and / or separating device 5 is located at the outlet of the printing unit 1. With regard to the basic structure of the web clamping and / or separating device 5, reference can be made to the above explanations. To avoid any type of dirt sensitivity here with the web clamping and / or disconnecting device likewise combined to form a structural unit, the web break switch 13 is designed as a push button switch which can be mechanically actuated by the web 2 which experiences a deflection. In the embodiment according to FIG. 2, the rubber cylinders interacting with the web 2 are offset relatively far from one another in order to achieve the largest possible web wrapping, so that the web 2 runs from the upper rubber cylinder 4 much later than from the lower rubber cylinder 4. With such a cylinder configuration, the deflection takes place experience shows that the web 2 in the event of a web break to the side of the cylinder 4 last left by the web 2. In the embodiment according to FIG. 2, a web break switch 13 arranged above the web 2 is therefore sufficient. This web break switch 13, which is attached to the web clamping and / or separating device 5 arranged at the area of the printing unit output, is located in the immediate vicinity of the web 2 deflecting in the event of a web break Cylinder 4 and thus in the region of the greatest path deflection, so that despite the mechanical mode of operation of the web break switch 13 provided here, reliable switch actuation takes place.

Der hier vorgesehene, mechanische Papierreißschalter 13 enthält, wie am besten aus Figur 3 ersichtlich ist, eine über die ganze Arbeitsbreits des Druckwerks 1 gehende Leiste 14, die in einem Gehäuse 15 aufgenommen und aus diesem bis auf Anschlag ausfahrbar ist. Hierzu ist die Leiste 14 mit zwei lotrecht zur Ebene der Papierbahn 2 verlaufenden Langlöchern 16 versehen, durch die jeweils ein gehäusefester Anschlagstift 17 hindurchgreift. Das Gehäuse 15, das hier an das Gehäuse 12 der Bahnklemm- und/oder -Trenneinrichtung 5 angesetzt ist, besitzt einen etwa U-förmigen Querschnitt, so daß sich aufgrund der durch die Anschlagstifte 17 miteinander verbundenen Seitenschenkel des Gehäuses eine zuverlässige Führung der Leiste 14 ergibt. Die Gehäusestirnseiten können durch Verschlußplatten verschlossen sein.The mechanical paper tear switch 13 provided here contains, as can best be seen from FIG. 3, a bar 14 which extends over the entire working width of the printing unit 1 and is accommodated in a housing 15 and can be extended as far as it will go. For this purpose, the strip 14 is provided with two oblong holes 16 running perpendicular to the plane of the paper web 2, through which each a housing-fixed stop pin 17 passes through. The housing 15, which is attached here to the housing 12 of the web clamping and / or separating device 5, has an approximately U-shaped cross section, so that due to the side legs of the housing connected by the stop pins 17, reliable guiding of the bar 14 results. The end faces of the housing can be closed by closing plates.

Die hier nach unten gehende Ausfahrbewegung der Leiste 14 kann durch Schwerkraft erfolgen. Im dargestellten Ausführungsbeispiel wird die Ausfahrbewegung durch zwei an der Leistenrückseite angreifende Ausfahrfedern 18 unterstützt. Hierbei handelt es sich jedoch um sehr leichte Federn, so daß die Leiste 14 entgegen der Schwerkraft und der Federkraft durch die im Falle eines Bahnrisses eine Auslenkung erfahrende Papierbahn 2 angehoben werden kann. Die Leiste 14 besteht aus Kunststoff und erweist sich demnach als selbstschmierend und korrosionssicher und damit pflegeleicht. Da der Leiste 14 ein vergleichsweise großes Laufspiel gegeben sein kann, können bei der Herstellung des Gehäuses 15 große Toleranzen zugelassen werden.The downward movement of the strip 14 here can take place by gravity. In the exemplary embodiment shown, the extension movement is supported by two extension springs 18 acting on the rear of the strip. However, these are very light springs, so that the bar 14 can be raised against the force of gravity and the spring force by the paper web 2 which experiences a deflection in the event of a web break. The strip 14 is made of plastic and therefore proves to be self-lubricating and corrosion-proof and therefore easy to care for. Since the bar 14 can be given a comparatively large running clearance, 15 large tolerances can be permitted in the manufacture of the housing.

In das Gehäuse 15 ragt von oben ein Schaltstift 19 eines auf das Gehäuse 15 aufgesetzten Steuerventils 20 hinein, das in der zu den Antriebseinrichtungen der Bahnklemm- und/oder -Trenneinrichtung 15 führenden Energieversorgungsleitung 21 angeordnet ist. Die Antriebseinrichtung kann aus Preßluftzylindern bestehen, die mit am Steuerventil 20 anstehender Preßluft betätigt werden. Der Schaltstift 19 ist so angeordnet, daß er durch die Rückseite der Leiste 14 gedrückt werden kann.A switching pin 19 of a control valve 20 placed on the housing 15 projects into the housing 15 from above and is arranged in the power supply line 21 leading to the drive devices of the web clamping and / or disconnecting device 15. The drive device can consist of compressed air cylinders which are actuated with compressed air present at the control valve 20. The Switch pin 19 is arranged so that it can be pressed through the back of the bar 14.

Bei störungsfreiem Normalbetrieb läuft die Bahn 2 berührungslos an der Unterseite der bis auf Anschlag aus dem zugeordneten Gehäuse 15 ausgefahrenen Leiste 14 vorbei, ebenso an den in ihre voneinander entfernte Warteposition gebrachten Klemm- und Schneidorganen in Form der Backen 6 Messer 7. Im Falle eines Bahnrisses mit anschließender Auslenkung der Bahn 2 wird die Leiste 14 von der ausgelenkten Bahn angehoben, wobei der Schaltstift 19 auf die Leistenrückseite aufläuft und gedrückt wird. Hierdurch wird das Ventil 20 auf Durchlauf gestellt, wodurch die Klemm- und Schneidorgane in Form der Backen 6 und Messer 7 in gegenseitigen Eingriff kommen.In the case of trouble-free normal operation, the web 2 runs without contact past the underside of the bar 14, which has been extended out of the associated housing 15 as far as it will go, as well as the clamping and cutting elements in the form of the jaws 6, knives 7, which are moved apart from one another in the waiting position. In the event of a web break with subsequent deflection of the web 2, the bar 14 is lifted from the deflected web, the switching pin 19 running onto the back of the bar and being pressed. As a result, the valve 20 is set to pass, whereby the clamping and cutting members in the form of the jaws 6 and knife 7 come into mutual engagement.

An das Ventil 20 ist im dargestellten Ausführungsbeispiel ein ebenfalls mittels der Schaltsstifts 19 betätigbarer Schalter 22 angesetzt, der in einer Steuerleitung 23 zur Stillsetzung des Maschinenhauptantriebs angeordnet ist.In the exemplary embodiment shown, a switch 22, which can also be actuated by means of the switching pin 19, is attached to the valve 20 and is arranged in a control line 23 for stopping the machine main drive.

Die gesamte, durch die Bahnklemm- und/oder -Trenneinrichtung 5 samt angesetztem Bahnreißschalter 13 und angesetzen Steuereinrichtungen in Form des Ventils 20 und des Schalters 22 gebildete Baueinheit, die hier zu Gewährleistung einer zuverlässigen mechanischen Betätigung des Bahnreißschalters 5 im Bereich des Ausgangs des Druckwerks 1 angeordnet ist, ist zur Gewährleistung einer guten Zugänglichkeit zu den Druckwerkszylindern an einem Ende um eine etwa horizontale Achse 24 hochschwenkbar an einer Druckwerksseitenwand gelagert, wie am besten aus Figur 3 erkennbar ist. Zur Abstützung dieser Baueinheit in der normalen Betriebsstellung kann ein unterhalb der Achse 24 angeordneter Anschlag 25 vorgesehen sein.The entire structural unit formed by the web clamping and / or disconnecting device 5 together with the attached web tear switch 13 and attached control devices in the form of the valve 20 and the switch 22, which here ensure a reliable mechanical actuation of the web tear switch 5 in the area of the output of the printing unit 1 is arranged, can be swiveled up at one end about an approximately horizontal axis 24 to ensure good access to the printing unit cylinders mounted on a printing unit side wall, as can best be seen from FIG. 3. To support this assembly in the normal operating position, a stop 25 arranged below the axis 24 can be provided.

Claims (10)

1. A device for preventing mechanical damage in web feed rotary printing presses, comprising at least one web gripping and/or web cutting device, which has a passage slot (9) and is arranged following one printing unit, preferably in the part between the last printing unit (1) and a following drier (3), and which is able to be actuated by means of a web sensing device detecting a tear in the web, characterized in that the web sensing means comprises at least one web tear detect switch (11 and, respectively, 13), which responds to contact with the web and which is integral with the web gripping and cutting means and is arranged in the latter at a distance from the plane, occupied during normal operation by the web (2), at a position, at which in the case of the web tearing there is a deflection of the web (2) caused by a cylinder (4) entraining web (2) free of tension.
2. The device as claimed in claim 1, characterized in that at least two web tear switches (11) are provided arranged approximately opposite each other in relation to the web (2).
3. The device as claimed in any one of the preceding claims, characterized in that the web tear switch or, respectively, switches (11 and, respectively, 13) is or are arranged adjacent to the upper and/or lower edge of the inlet cross section of the passage slot (9).
4. The device as claimed in any one of the preceding claims, characterized in that the integral unit consisting of the web gripping and/or cutting means (5) and the web tear switch (11 and, respectively, 13) is arranged adjacent to one end thereof for upward pivoting about an approximately horizontal axis.
5. The device as claimed in any one of the preceding claims, characterized in that the web tear switch or switches (11) is or are constituted by capacitive switches.
6. The device as claimed in any one of the preceding claims 1 through 4, characterized in that the web tear switch or switches (13) has or have a mechanical feeler adapted to be deflected out of the path (2) and is constituted by a rail (14) extending over the full working width and preferably manufactured of synthetic resin, which in its neutral position contacts an abutment (17) and in a position clear of the abutment (17) actuates a drive member (20) associated with the web gripping and/or cutting device.
7. The device as claimed in claim 6, characterized in that the rail (14) constituting the feeler is able to be moved out under the action of at least one moving out spring (18) as far as an abutment (17) from a housing which is approximately U-like in cross section, in relation to whose clearance width the rail (14) has running play.
8. The device as claimed in claim 6 and/or claim 7, characterized in that the rail (14) is provided with at least one slot (16) parallel to the direction of outward movement and through which an abutment pin (17) extends.
9. The device as claimed in at least one of the claims 6 through 8, characterized in that the drive member (20), which is arranged in the power supply line (21) of the web gripping and/or cutting device (5) and is preferably constituted by a spool valve, has a operating pin (19) extending into the housing (15) and such pin is able to be actuated by the rail (14) and is able to be moved up and down directly by the power supply line (21) thereof.
10. The device as claimed in any one of the preceding claims, characterized in that by means of the web tear switch or of the web tear switches (11 and, respectively, 13) a switch (22) is able to be actuated which is arranged in a signal line (23) for switching off the main drive of the printing press.
EP88119646A 1987-12-02 1988-11-25 Apparatus for avoiding damage to machines Expired - Lifetime EP0318853B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3740812 1987-12-02
DE3740812 1987-12-02
DE3822497A DE3822497A1 (en) 1987-12-02 1988-07-02 DEVICE FOR PREVENTING MACHINE DAMAGE
DE3822497 1988-07-02

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EP0318853A2 EP0318853A2 (en) 1989-06-07
EP0318853A3 EP0318853A3 (en) 1989-09-20
EP0318853B1 true EP0318853B1 (en) 1991-08-21

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EP (1) EP0318853B1 (en)
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4219645A1 (en) * 1992-06-16 1993-12-23 Weitmann & Konrad Fa Tear detection system for determining break in paper web in continuous drier - used in rotary printing press with printing cylinders for printing forward running paper web arranged before continuous drier

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10219541C1 (en) * 2002-05-02 2003-12-11 Koenig & Bauer Ag Device for detecting a web bridge on a machine processing a web
DE3938478A1 (en) * 1989-11-20 1991-05-23 Koenig & Bauer Ag DEVICE FOR PREVENTING MACHINE DAMAGE
US5063845A (en) * 1990-02-16 1991-11-12 Perretta Graphics Corporation Anti-wrap for high speed printing press
DE4105559C1 (en) * 1991-02-22 1992-09-17 Heidelberger Druckmaschinen Ag, 6900 Heidelberg, De
DE4106901C2 (en) * 1991-03-05 1994-05-26 Kotterer Grafotec Method and device for monitoring a web
DE4124391C2 (en) * 1991-07-23 1995-08-31 Kotterer Grafotec Device for severing and holding a torn web
DE4201481A1 (en) * 1992-01-21 1993-07-22 Heidelberger Druckmasch Ag DEVICE FOR HANDLING MATERIAL COATINGS IN PROCESSING MACHINES
DE4210190A1 (en) * 1992-03-28 1993-09-30 Roland Man Druckmasch Safety device for running webs
US5365843A (en) * 1993-05-26 1994-11-22 Heidelberg Druckmaschinen Ag Printing press with web breaking assembly
DE4340836C1 (en) * 1993-12-01 1995-02-16 Roland Man Druckmasch Web cutting device for web-fed rotary printing machines
DE4432659A1 (en) * 1994-09-14 1996-03-21 Kotterer Grafotec Device for preventing damage to the printing unit
US5712489A (en) * 1995-11-21 1998-01-27 Macmillan Bloedel Limited Web flutter detection
DE69716570T2 (en) * 1997-01-21 2003-06-26 Baldwin-Japan Ltd., Tokio/Tokyo Device for preventing winding in web printing machines
FR2761355B1 (en) * 1997-03-26 1999-06-11 Heidelberg Harris Sa DEVICE FOR RETAINING A STRIP IN THE SUPERSTRUCTURE OF A ROTARY PRINTING MACHINE
DE19822375C2 (en) * 1998-05-19 2001-12-20 Zirkon Druckmaschinen Gmbh Process for preventing technical damage to a web-fed rotary printing press
ITBO20010079A1 (en) * 2001-02-14 2002-08-14 Gd Spa METHOD AND DEVICE FOR THE CONTROL OF WRAPPING MATERIAL IN A WRAPPING MACHINE
DE10241673A1 (en) 2001-09-25 2003-04-10 Heidelberger Druckmasch Ag Catching device for torn transport belt, has tension measuring unit which triggers holder when transport belt tension is below predetermined value such that holder has rollers respectively formed with convex and concave surfaces
DE10222587A1 (en) * 2002-05-22 2003-12-04 Voith Paper Patent Gmbh Paper coating station has automated emergency water cooling system triggered by unplanned termination of web feed, break or tear
DE10222586A1 (en) * 2002-05-22 2003-12-04 Voith Paper Patent Gmbh Paper or carton web coating assembly has guillotine cutter on web feed inlet side and second guillotine cutter on web output side
DE10227694A1 (en) * 2002-06-19 2004-01-29 Koenig & Bauer Ag Device and method for detecting a running disturbance in a running material web
DE10234248B4 (en) * 2002-07-27 2006-07-13 Koenig & Bauer Ag Separating device for cutting through a running material web
US8157199B2 (en) * 2005-08-31 2012-04-17 Kimberly-Clark Worldwide, Inc. Rewinder web chop with early detection and web diversion to eliminate equipment damage

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2965023A (en) * 1957-09-18 1960-12-20 Donnelley & Sons Co Latch and thrust mechanism for printing press ink carriages
US3272049A (en) * 1963-12-16 1966-09-13 Cooksey Otha Web severing device
US3317734A (en) * 1964-01-15 1967-05-02 Du Pont Defect detector and stop motion control system
US3323699A (en) * 1965-10-04 1967-06-06 Allegheny Ludlum Steel Strip centerline sensor and control
US3404627A (en) * 1967-01-19 1968-10-08 John W. Halley Web severing device for offset printing press
US3722773A (en) * 1969-12-29 1973-03-27 G Plate Jam detector
US3638568A (en) * 1970-08-07 1972-02-01 Wallace H Granger Rotary newspaper printing press having automatic interrupters for press cylinders
US3928844A (en) * 1974-06-17 1975-12-23 Butler Automatic Inc Web break detector system
US3958735A (en) * 1975-02-18 1976-05-25 Teletype Corporation Method and apparatus for detecting paper drive malfunctioning in an automatic printer
DE2646814C2 (en) * 1976-10-16 1985-03-28 Lindauer Dornier Gmbh, 8990 Lindau Dryer for material webs guided over endlessly circulating conveyor belts
DE3130034A1 (en) * 1980-02-06 1982-11-25 VEB Kombinat Polygraph "Werner Lamberz" Leipzig, DDR 7050 Leipzig Capacitive control and evaluation device on book-binding and printing machines
DE3215473C2 (en) * 1982-04-24 1985-03-07 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Device for preventing printing unit damage in the event of print carrier web breaks
JPS58211455A (en) * 1982-06-01 1983-12-08 ハイデルベルガ−　ドウリユツクマシ−ネン　アクチエンゲゼルシヤフト Preventive device for defective operation of rotary press
DE3244045C2 (en) * 1982-11-27 1984-12-20 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Device to prevent printer damage in the event of paper web breaks
DE3319961C2 (en) * 1983-06-01 1986-03-13 Siemens AG, 1000 Berlin und 8000 München Paper feed device for printing devices, in particular typewriters or office machines
DE3431686A1 (en) * 1984-08-29 1986-04-24 Werner J. 8901 Diedorf Kotterer Device for preventing looping which is damaging to the machine
JPS6194764A (en) * 1984-10-17 1986-05-13 Mitsubishi Heavy Ind Ltd Process for preventing accompanied breakage of running paper in rotary press printer
US4714946A (en) * 1985-11-27 1987-12-22 International Business Machines Corporation Continuous form feeder for a reproducing machine and process
DE3608182A1 (en) * 1986-03-12 1987-10-01 Roland Man Druckmasch DEVICE FOR REGULATING THE TENSION OF A PRESSURE CARRIER RAIL WITH AN EMERGENCY STOP DEVICE
DD255913A1 (en) * 1986-11-10 1988-04-20 Polygraph Leipzig SAFETY DEVICE FOR RESPONDING TO RAIL, INS. FOR ROLLER ROTATION OFFSET PRINTING MACHINES

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4219645A1 (en) * 1992-06-16 1993-12-23 Weitmann & Konrad Fa Tear detection system for determining break in paper web in continuous drier - used in rotary printing press with printing cylinders for printing forward running paper web arranged before continuous drier

Also Published As

Publication number Publication date
EP0318853A3 (en) 1989-09-20
DE3822497A1 (en) 1989-10-19
EP0318853A2 (en) 1989-06-07
DE3864389D1 (en) 1991-09-26
US4887532A (en) 1989-12-19
JPH01168453A (en) 1989-07-03

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