EP0802138B1 - Device for severing a running web - Google Patents

Device for severing a running web Download PDF

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Publication number
EP0802138B1
EP0802138B1 EP97105845A EP97105845A EP0802138B1 EP 0802138 B1 EP0802138 B1 EP 0802138B1 EP 97105845 A EP97105845 A EP 97105845A EP 97105845 A EP97105845 A EP 97105845A EP 0802138 B1 EP0802138 B1 EP 0802138B1
Authority
EP
European Patent Office
Prior art keywords
knife
web
chopping knife
material web
energy
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
EP97105845A
Other languages
German (de)
French (fr)
Other versions
EP0802138A2 (en
EP0802138A3 (en
Inventor
Bernd Kaufmann
Zygmunt Madrzak
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Paper Patent GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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Publication of EP0802138A2 publication Critical patent/EP0802138A2/en
Publication of EP0802138A3 publication Critical patent/EP0802138A3/en
Application granted granted Critical
Publication of EP0802138B1 publication Critical patent/EP0802138B1/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/25—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member
    • B26D1/34—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis parallel to the line of cut
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • B26D5/12—Fluid-pressure means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H19/00—Changing the web roll
    • B65H19/10—Changing the web roll in unwinding mechanisms or in connection with unwinding operations
    • B65H19/20—Cutting-off the expiring web
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S83/00—Cutting
    • Y10S83/929—Particular nature of work or product
    • Y10S83/949—Continuous or wound supply
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/647—With means to convey work relative to tool station
    • Y10T83/6582—Tool between tandem arranged work carrying means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/647—With means to convey work relative to tool station
    • Y10T83/6584—Cut made parallel to direction of and during work movement
    • Y10T83/6635—By feed roller
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8798—With simple oscillating motion only
    • Y10T83/8804—Tool driver movable relative to tool support
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/889—Tool with either work holder or means to hold work supply
    • Y10T83/896—Rotatable wound package supply

Definitions

  • the invention relates to a device for severing a web, in particular made of paper or cardboard.
  • a device for severing a web in particular made of paper or cardboard.
  • Such methods and devices are e.g. used in paper machines, also in machines used by the paper machine are connected downstream, for example in rewinders, coating machines or Roll cutting machines.
  • Known devices for example according to DE 38 15 277, have machine-wide knife that extends transversely to the paper running direction.
  • the Knife edge of the knives according to the above publication has one large distance from the point of impact of the knife edge to the glue point of the Adhesive roller on. This has the consequence that after cutting the web and Glue with a new one, or a piece of paper that is too long behind the glue point Paper tail remains, leading to tears, for example, in a downstream Coating machine, especially with thin papers.
  • the Device according to DE 38 15 227 still has the disadvantage that a knife blade with teeth is used, which leads to the fact that the web undesirably a Has cut edge with serrations.
  • DE-U-94 13 363 shows a device for severing a running one Goods web with a knock-off knife strongly inclined against the web direction, avoids the latter of the above disadvantage.
  • the angle that during the cutting process between the knives and the web in the article according to DE-U-94 13 363 less than 45 degrees. It can hereby largely at low web speeds over the web rectilinear cutting edge can be reached. Especially at high web speeds The measures according to DE-U-94 13 363 are no longer> 1500 m / min sufficient to achieve the desired operational safety.
  • the cutting speed of the cutting knife is usually not sufficient, to achieve a jag-free tee.
  • the object of the invention is therefore to occur at high web speeds To overcome disadvantages of the devices according to the prior art. This object is achieved according to the invention by a device according to the characterizing part of claim 1 solved.
  • the knife edge of the tee knife located below the web in the rest position in the gusset between the paper web and a pressure roller with a small distance to a gap formed by the pressure roller and a roller.
  • a knock-off knife Actuating device is assigned, the at least one pulse exchange device includes.
  • the pulse exchange can take place mechanically or pneumatically.
  • a pulse or pulse exchange of two masses is generated by means of the pulse exchange device.
  • V 2 2m 1 ⁇ V 1 m 1 + m 2
  • V 2 is the speed of the tee knife with mass m 2 after impact
  • V 1 is the speed of impact mass m 1 . If m 2 is very much smaller than m 1 , it can be achieved in the best case that the speed of the knock-off knife is twice as high as the speed of the striking mass.
  • Pulse generator can be provided. This is a directional flow - for example Compressed air - used, which is directed to the tee knife and that Tee knife accelerated by exchanging the flow impulse.
  • the acceleration of the tee knife can still be supported be when the actuator in addition to those described An energy storage device, for example a spring or a pulse generator Compressed air reservoir.
  • An energy storage device for example a spring or a pulse generator Compressed air reservoir.
  • the knock-off knife is inclined against the direction of web travel.
  • the angle that results between the cutting knife and the web during the cutting process is less than 45 degrees. Due to the inclined position of the cutting knife, the cutting times are reduced even further compared to the solutions shown above, so that the material web is cut very quickly. For example, dodging the web and thus the tendency to wrinkle is almost impossible.
  • the Cutting edge influencing factors such as the angle that changes during the Cutting process between the tee knife and the web results
  • Web speed and feed knife feed rate kit are optimally coordinated in terms of a jag-free tee.
  • the invention is particularly characterized in that the knock-off knife is accelerated by exchange of impulses in such a way that the running web of goods with high cutting knife speed is cut.
  • the new paper roll is designated by the reference number 1, the by the reference number 2 old paper roll, as well as with 3 the running, ending paper web. Should that End of the web 3 are glued to the beginning of the new roll 1, so the Move the gluing device in the direction of roll 1. Between the pressure roller 4 and the new paper roll 1 creates a gap or a connection point 5 where the end the old web is glued to the beginning of the new web.
  • the separating device 10 is arranged, which in the present case a pulse exchange device 11 is provided.
  • the tee knife 12 has one cutting blade 13 inclined against the web running direction.
  • the separating device Due to the illustrated design of the separating device, it also occurs when cutting to no lifting of the web, so that after constructions the prior art required web stabilization devices, such as For example, suction boxes that were arranged in front of the glue point in the present invention can be avoided.
  • FIG. 2 The device according to the invention according to FIG. 1 is shown in more detail in FIG. 2.
  • the separating device 10 is arranged in the gusset below the paper web 3 in the vicinity of the pressure roller 4.
  • the knock-off knife 12 with the cutting blade 13 inclined against the web running direction is clamped in a clamp holder 14.
  • the part of the knock-off knife 12 which is not clamped can be moved in the vertical direction by the action of bending forces.
  • the bracket 14 is fixedly attached to a support arm 15 of the separating device 10. Below the clamp bracket 14, a mechanical pulse generator 17 is pivotally mounted on the support arm 15 in a bearing 16.
  • the mechanical pulse generator 17 which is pivotally or rotatably mounted in the bearing 16, is held elastically between the underside of the holder 14 and a support 18 by means of two deformable elements, for example elastic compressed air hoses, by means of a clamping effect. If the lower compressed air hose 19 is now filled and the upper compressed air hose 20 is emptied, the mechanical pulse generator 17 is pivoted about the axis of the bearing 16 and comes to a stop with the lower edge of the knock-off knife 12. Here, a pulse exchange takes place from the mechanical pulse generator to the knock-off knife. The clamped knife 12 is accelerated in the direction of the paper web and cuts it.
  • two deformable elements for example elastic compressed air hoses
  • the knife 12 Since the knife 12 is clamped in the holder 14, it is brought back into the starting position shown as a result of the tensioning of the knife as a result of the restoring force.
  • a stop 52 prevents the knife from overshooting in the direction of the mechanical pulse generator 17.
  • FIGS. 4 and 5 Further embodiments of a mechanical pulse generator (see FIG. 3) and a pneumatic pulse generator are shown schematically in FIGS. 4 and 5.
  • the tee knife 12 is rotatably supported in a solid bearing block 21 as shown in FIG. 3.
  • the bearing block 21 has a circular bore 22 which receives the bearing 16 of the knock-off knife 12.
  • the bearing bore 22 is followed by a V-shaped recess 23 embedded in the bearing block. In the rest position, the knife 12 rests on the lower edge 24 of the V-shaped recess 23.
  • a mechanical pulse generator 26 is attached to the bearing block 21 by means of a holder 25.
  • the mechanical pulse generator 26 comprises a cylinder part 27, which can be operated with the aid of compressed air or else hydraulically, and a plunger 28 of mass m 1 , which is placed on a piston rod 29 of the piston let into the cylinder part. If the tee knife is to be actuated, the cylinder 27 is released from its rest position shown, the mass m 1 of the ram accelerates to the speed V 1 with which it hits the stationary, rotatably mounted tee knife at point 30.
  • the momentum of the mass m 1 is practically completely transferred to the movable mass of the knock-off knife m 2 , which is accelerated to a speed V 2 , moves about the bearing axis into the position shown in broken lines and thereby cuts the paper web 3.
  • the rotational movement of the knock-off knife 12 is limited by the upper side 31 of the V-shaped cutout 23. If the paper web is severed, the knock-off knife reaches the starting position by restoring forces, for example gravity, in which the knock-off knife is in contact with the underside 24 of the V-shaped cutout 23, and the plunger 28 is inserted into the starting or Move to rest position.
  • Fig. 4 shows a further embodiment of an inventive Tee knife, with a pneumatic pulse generator.
  • the tee knife 12 is rotatable in a bearing 22 in a massive bearing block 21 stored.
  • the bearing block 21 has a V-shaped as in Fig. 3 Section 23 on.
  • In the bottom 24 of the V-shaped cutout 23 of the Bearing block 21 are in a row in a plurality of openings 40 of a nozzle body arranged.
  • the openings 40 are connected via channels 41 to a pressure storage chamber 43 which is embedded in the bearing block 21 and in which a compressed air hose 42 lies.
  • the knock-off knife In the rest position, the knock-off knife is in contact with the underside of the V-shaped cutout 24. If the knife is to be actuated, when the compressed air hose 42 is vented, compressed air flows out of the compressed air storage chamber 43 through the duct 41 to the opening 40. Through the flow the pulse carried along is actuated and accelerated to a speed V 2 , whereby the paper web 3 is severed.
  • the rotational movement of the knife 12 is limited by the upper side 31 of the V-shaped cutout 23 as in FIG. 3.
  • valves (not in the figure shown) trigger the outflow from the compressed air storage chamber 43.
  • the Valves are expediently integrated into the channels 41 for this purpose.
  • an energy storage device or an energy storage system with a Pulse exchange device for example according to Fig. 3 or Fig. 4 to combine.
  • a Pulse exchange device for example according to Fig. 3 or Fig. 4 to combine.
  • a spring 50 use as Energy storage takes place according to Fig. 5 .
  • Others too Energy stores such as filled elastic compressed air hoses etc. would be conceivable.
  • the spring is in the compressed state when the hitting knife is like shown occupies the rest position. So that the knife through the in the spring stored energy is not operated unintentionally, the knock-off knife a hold-down device 51 is fixed in the position shown. If you release the knife, so the timing knife is coordinated with one another with a flow impulse acted upon and the hold-down 51 in the position shown in dashed lines pivoted, whereby the energy stored in the spring is released suddenly and the tee knife is accelerated in addition to the pulse exchange.

Description

Die Erfindung betrifft eine Vorrichtung zum Durchtrennen einer Warenbahn, insbesondere aus Papier oder Karton. Derartige Verfahren und Vorrichtungen werden z.B. in Papiermaschinen angewandt, ferner in Maschinen, die der Papiermaschine nachgeschaltet sind, beispielsweise in Umrollern, Streichmaschinen oder Rollenschneidmaschinen.The invention relates to a device for severing a web, in particular made of paper or cardboard. Such methods and devices are e.g. used in paper machines, also in machines used by the paper machine are connected downstream, for example in rewinders, coating machines or Roll cutting machines.

Bekannte Vorrichtungen beispielsweise gemäß der DE 38 15 277 weisen ein maschinenbreites Messer auf, das sich quer zur Papierlaufrichtung erstreckt. Die Messerkante der Abschlagmesser gemäß der obengenannten Druckschrift weist einen großen Abstand vom Einschlagpunkt der Messerkante bis zur Klebestelle der Klebewalze auf. Das hat zur Folge, daß nach Durchtrennen der Warenbahn und Verkleben mit einer neuen, hinter der Klebestelle ein zu langer Papierrest oder Papierschwanz verbleibt, was zu Abrissen beispielsweise in einer nachgeschalteten Streichmaschine, insbesondere bei dünnen Papiersorten, führt. Des weiteren weist die Vorrichtung gemäß der DE 38 15 227 noch den Nachteil auf, daß eine Messerklinge mit Zähnen Verwendung findet, was dazu führt, daß die Bahn unerwünschterweise eine Schnittkante mit Zacken aufweist.Known devices, for example according to DE 38 15 277, have machine-wide knife that extends transversely to the paper running direction. The Knife edge of the knives according to the above publication has one large distance from the point of impact of the knife edge to the glue point of the Adhesive roller on. This has the consequence that after cutting the web and Glue with a new one, or a piece of paper that is too long behind the glue point Paper tail remains, leading to tears, for example, in a downstream Coating machine, especially with thin papers. Furthermore, the Device according to DE 38 15 227 still has the disadvantage that a knife blade with teeth is used, which leads to the fact that the web undesirably a Has cut edge with serrations.

Die DE-U-94 13 363 zeigt eine Vorrichtung zum Durchtrennen einer laufenden Warenbahn mit einem entgegen der Bahnrichtung stark geneigten Abschlagmesser, die letzteren des obengenannten Nachteiles vermeidet. Der Winkel, der sich während des Schneidevorgangs zwischen dem Abschlagmesser und der Warenbahn ergibt, ist bei dem Gegenstand gemäß der DE-U-94 13 363 kleiner als 45 Grad. Zwar kann hiermit bei geringen Bahngeschwindigkeiten eine über die Warenbahn weitgehend geradlinige Schnittkante erreicht werden. Vor allem bei hohen Bahngeschwindigkeiten > 1500 m/min sind die Maßnahmen gemäß der DE-U-94 13 363 aber nicht mehr ausreichend, um die gewünschte Betriebssicherheit zu erreichen. Neben den bekannten Problemen kommt bei den obengenannten hohen Bahngeschwindigkeiten hinzu, daß die Durchtrenngeschwindigkeit des Abschlagmessers meist nicht ausreicht, um einen zackenfreien Abschlag zu erzielen. DE-U-94 13 363 shows a device for severing a running one Goods web with a knock-off knife strongly inclined against the web direction, avoids the latter of the above disadvantage. The angle that during the cutting process between the knives and the web in the article according to DE-U-94 13 363 less than 45 degrees. It can hereby largely at low web speeds over the web rectilinear cutting edge can be reached. Especially at high web speeds The measures according to DE-U-94 13 363 are no longer> 1500 m / min sufficient to achieve the desired operational safety. In addition to the known problems come at the high web speeds mentioned above added that the cutting speed of the cutting knife is usually not sufficient, to achieve a jag-free tee.

Aufgabe der Erfindung ist es somit, die bei hohen Bahngeschwindigkeiten auftretenden Nachteile der Vorrichtungen gemäß dem Stand der Technik zu überwinden. Diese Aufgabe wird gemäß der Erfindung durch eine Vorrichtung gemäß dem kennzeichnenden Teil von Anspruch 1 gelöst.The object of the invention is therefore to occur at high web speeds To overcome disadvantages of the devices according to the prior art. This object is achieved according to the invention by a device according to the characterizing part of claim 1 solved.

Gemäß einer ersten Lösung des Problems ist vorgesehen, daß die Messerschneide des unterhalb der Warenbahn angeordneten Abschlagmessers in der Ruheposition sich im Zwickel zwischen der Papierbahn und einer Anpreßrolle mit geringem Abstand zu einem von der Anpreßrolle und einer Walze gebildeten Spalt befindet. Dies hat den Vorteil, daß der Warenbahnrest, der nach Durchtrennen der Bahn in den Spalt, der beispielsweise ein Klebespalt sein kann, einläuft, sehr kurz ist.According to a first solution to the problem, it is provided that the knife edge of the tee knife located below the web in the rest position in the gusset between the paper web and a pressure roller with a small distance to a gap formed by the pressure roller and a roller. This has the Advantage that the remainder of the web, which after cutting the web in the gap, the For example, an adhesive gap can run in, is very short.

Gemäß der Erfindung ist vorgesehen, daß dem Abschlagmesser eine Betätigungsvorrichtung zugeordnet ist, die wenigstens eine ImpulsaustauschVorrichtung umfaßt. Durch die Verwendung einer solchen Betätigungsvorrichtung wird gegenüber den bislang bekannten Betätigungsvorrichtungen der Vorteil eines zackenfreien Abschlags bei sehr hohen Bahngeschwindigkeiten erzielt.According to the invention it is provided that a knock-off knife Actuating device is assigned, the at least one pulse exchange device includes. By using such an actuator the advantage of a compared to the previously known actuators jag-free tee achieved at very high web speeds.

Gemäß einer Weiterbildung der Erfindung kann der Impulsaustausch auf mechanischem oder pneumatischem Wege erfolgen. Mittels der Impulsaustauschvorrichtung wird ein Stoß bzw. Impulsaustausch zweier Massen erzeugt. Wie aus nachfolgender Formel für einen mechanischen Impulsgeber ersichtlich ist, ist es von besonderem Vorteil, wenn die Masse des Abschlagmessers sehr gering ist, V2=2m1·v1 m1+m2 wobei V2 die Geschwindigkeit des Abschlagmessers mit der Masse m2 nach dem Stoß und V1 die Geschwindigkeit der stoßenden Masse m1 ist. Falls m2 sehr viel kleiner als m1 ist, kann im günstigsten Fall erreicht werden, daß die Geschwindigkeit des Abschlagmessers doppelt so groß ist wie die Geschwindigkeit der stoßenden Masse. According to a development of the invention, the pulse exchange can take place mechanically or pneumatically. A pulse or pulse exchange of two masses is generated by means of the pulse exchange device. As can be seen from the following formula for a mechanical pulse generator, it is particularly advantageous if the mass of the knock-off knife is very small, V 2 = 2m 1 · V 1 m 1 + m 2 where V 2 is the speed of the tee knife with mass m 2 after impact and V 1 is the speed of impact mass m 1 . If m 2 is very much smaller than m 1 , it can be achieved in the best case that the speed of the knock-off knife is twice as high as the speed of the striking mass.

Als Impulsgeber kann auch wie vorstehend schon erwähnt ein pneumatischer Impulsgeber vorgesehen sein. Dabei wird eine gerichtete Strömung - beispielsweise Druckluft - verwendet, die zum Abschlagmesser hin geleitet wird und das Abschlagmesser durch Austausch des Strömungimpulses beschleunigt.As already mentioned above, a pneumatic can also be used as the pulse generator Pulse generator can be provided. This is a directional flow - for example Compressed air - used, which is directed to the tee knife and that Tee knife accelerated by exchanging the flow impulse.

Darüber hinaus kann die Beschleunigung des Abschlagmessers noch unterstützt werden, wenn die Betätigungsvorrichtung zusätzlich zu den beschriebenen Impulsgebern eine Energiespeichervorrichtung, beispielsweise eine Feder oder einen Druckluftspeicher, aufweist. Bei Betätigung des Messers wird die in diesen Systemen gespeicherte Energie schlagartig freigesetzt und in Bewegungsenergie des Abschlagmessers umgewandelt.In addition, the acceleration of the tee knife can still be supported be when the actuator in addition to those described An energy storage device, for example a spring or a pulse generator Compressed air reservoir. When the knife is actuated, the in these systems stored energy suddenly released and in the kinetic energy of the Tee knife converted.

Besonders vorteilhaft ist es, wenn das Abschlagmesser entgegen der Bahnlaufrichtung geneigt ist. In einer bevorzugten Ausgestaltung ist vorgesehen, daß der Winkel, der sich während des Schneidvorganges zwischen dem Abschlagmesser und der Warenbahn ergibt, kleiner als 45 Grad ist. Durch die Schrägstellung des Abschlagmessers verkürzen sich die Schnittzeiten gegenüber den zuvor aufgezeigten Lösungen noch weiter, so daß das Durchtrennen der Warenbahn sehr schnell vollzogen wird.
Beispielsweise ist ein Ausweichen der Bahn und damit die Tendenz zur Faltenbildung fast ausgeschlossen.It is particularly advantageous if the knock-off knife is inclined against the direction of web travel. In a preferred embodiment it is provided that the angle that results between the cutting knife and the web during the cutting process is less than 45 degrees. Due to the inclined position of the cutting knife, the cutting times are reduced even further compared to the solutions shown above, so that the material web is cut very quickly.
For example, dodging the web and thus the tendency to wrinkle is almost impossible.

In einer besonders bevorzugten Ausführungsform ist vorgesehen, daß die die Schnittkante beeinflussenden Faktoren wie der Winkel, der sich während des Schneidvorganges zwischen dem Abschlagmesser und der Warenbahn ergibt, die Geschwindigkeit der Warenbahn und die Zuführgeschwindigekit des Abschlagmessers optimal im Bezug auf einen zackenfreien Abschlag aufeinander abgestimmt sind.In a particularly preferred embodiment it is provided that the Cutting edge influencing factors such as the angle that changes during the Cutting process between the tee knife and the web results Web speed and feed knife feed rate kit are optimally coordinated in terms of a jag-free tee.

Die Erfindung zeichnet sich insbesondere dadurch aus, daß das Abschlagmesser durch Impulsaustausch derart beschleunigt wird, daß die laufende Warenbahn mit hoher Abschlagmessergeschwindigkeit durchtrennt wird.The invention is particularly characterized in that the knock-off knife is accelerated by exchange of impulses in such a way that the running web of goods with high cutting knife speed is cut.

Die Erfindung soll anhand der nachfolgenden Figuren beispielhaft beschrieben werden. The invention will be described by way of example with reference to the following figures.

Es zeigen:

Fig. 1
die Anordnung der erfindungsgemäßen Schneidvorrichtung im Zwickel zwischen der Bahn in geringem Abstand von einem von Anpreßrolle und Walze gebildeten Spalt.
Fig. 2
eine Ausgestaltung des erfindungsgemäß angeordneten Abschlagmessers nach Fig. 1.
Fig. 3
eine Ausführungsform des Abschlagmessers mit mechanischem Impulsgeber als Betätigungsvorrichtung.
Fig. 4
eine Ausführungsform des Abschlagmessers mit nicht mechanischem Impulsgeber.
Fig. 5
eine Ausführungsform des Abschlagmessers mit Impulsgeber und Energiespeichervorrichtung.
Fig. 1
zeigt in einer vereinfachten Darstellung die erfindungsgemäße Anordnung des Abschlagmessers in einer Klebevorrichtung für Streichmaschinen.
Show it:
Fig. 1
the arrangement of the cutting device according to the invention in the gusset between the web at a short distance from a gap formed by the pressure roller and roller.
Fig. 2
an embodiment of the tee knife according to the invention according to FIG. 1.
Fig. 3
an embodiment of the tee knife with mechanical pulse generator as an actuator.
Fig. 4
an embodiment of the tee knife with non-mechanical pulse generator.
Fig. 5
an embodiment of the tee knife with pulse generator and energy storage device.
Fig. 1
shows in a simplified representation the arrangement according to the invention of the cutting knife in an adhesive device for coating machines.

Mit der Bezugsziffer 1 ist die neue Papierrolle bezeichnet, mit der Bezugsziffer 2 die alte Papierrolle, sowie mit 3 die ablaufende, zu Ende gehende Papierbahn. Soll das Ende der Bahn 3 an den Bahnanfang der neuen Rolle 1 geklebt werden, so wird die Klebevorrichtung in Richtung zur Rolle 1 verfahren. Zwischen der Anpreßrolle 4 und der neuen Papierrolle 1 entsteht ein Spalt bzw. eine Verbindungsstelle 5, wo das Ende der alten Bahn an den Anfang der neuen Bahn geklebt wird. Unmittelbar vor der Anpreßrolle 4 ist die Trennvorrichtung 10 angeordnet, die im vorliegenden Fall mit einer Impulsaustauschvorrichtung 11 versehen ist. Das Abschlagmesser 12 weist eine entgegen der Bahnlaufrichtung geneigte Schneidklinge 13 auf. Durch die Anordnung der Trennvorrichtung 10 im Zwickel zwischen der Rolle 1 und der Anpreßrolle 4 mit geringem Abstand zum Klebespalt 5 wird erreicht, daß der nach Durchtrennung der Papierbahn 3 in den Klebespalt einlaufende Rest der alten Papierbahn nur kurz ist. The new paper roll is designated by the reference number 1, the by the reference number 2 old paper roll, as well as with 3 the running, ending paper web. Should that End of the web 3 are glued to the beginning of the new roll 1, so the Move the gluing device in the direction of roll 1. Between the pressure roller 4 and the new paper roll 1 creates a gap or a connection point 5 where the end the old web is glued to the beginning of the new web. Immediately before Pressure roller 4, the separating device 10 is arranged, which in the present case a pulse exchange device 11 is provided. The tee knife 12 has one cutting blade 13 inclined against the web running direction. By the arrangement the separator 10 in the gusset between the roller 1 and the pressure roller 4 with short distance to the adhesive gap 5 is achieved that after cutting the Paper web 3 running into the adhesive gap is only a short rest of the old paper web.

Aufgrund der dargestellten Ausführung der Trennvorrichtung kommt es darüber hinaus beim Durchtrennen zu keiner Anhebung der Bahn, so daß die bei Konstruktionen nach dem Stand der Technik erforderlichen Bahn-Stabilisierungseinrichtungen, wie beispielsweise Saugkästen, die vor der Klebestelle angeordnet waren, in der vorliegenden Erfindung vermieden werden.Due to the illustrated design of the separating device, it also occurs when cutting to no lifting of the web, so that after constructions the prior art required web stabilization devices, such as For example, suction boxes that were arranged in front of the glue point in the present invention can be avoided.

In Fig. 2 ist die erfindungsgemäße Vorrichtung nach Fig. 1 detaillierter dargestellt.The device according to the invention according to FIG. 1 is shown in more detail in FIG. 2.

Wie bei der Anordnung gemäß Fig. 1 ist die Trennvorrichtung 10 im Zwickel unterhalb der Papierbahn 3 in der Nähe der Anpreßrolle 4 angeordnet. Das Abschlagmesser 12 mit der gegen die Bahnlaufrichtung geneigten Schneidklinge 13 ist in einer Klemmhalterung 14 eingespannt.
Der nicht eingespannte Teil des Abschlagmessers 12 kann in vertikaler Richtung durch Einwirken von Biegekräften bewegt werden. Die Halterung 14 ist fest an einem Tragarm 15 der Trennvorrichtung 10 angebracht. Unterhalb der Klemmhalterung 14 ist am Tragarm 15 in einem Lager 16 ein mechanischer Impulsgeber 17 verschwenkbar angebracht. Der im lager 16 verschwenk- bzw. drehbar gelagerte mechanische Impulsgeber 17 wird zwischen der Unterseite der Halterung 14 und einer Abstützung 18 elastisch mittels zweier verformbarer Elemente, beispielsweise elastischen Druckluftschläuchen, durch Klammerwirkung gehalten. Wird nun der untere Druckluftschlauch 19 befüllt und der obere Druckluftschlauch 20 entleert, so wird der mechanische Impulsgeber 17 um die Achse des Lagers 16 verschwenkt und kommt mit der Unterkante des Abschlagmessers 12 zum Anschlag. Hierbei findet ein Impulsaustausch vom mechanischen Impulsgeber auf das Abschlagmesser statt. Das eingespannte Abschlagmesser 12 wird in Richtung der Papierbahn beschleunigt und durchtrennt diese. Da das Messer 12 in der Halterung 14 eingespannt ist, wird es durch die rücktreibende Kraft resultierend aus der Verspannung des Messers in die dargestellte Ausgangsposition zurückgeholt. Hierbei verhindert ein Anschlag 52 ein Überschwingen des Messers in Richtung des mechanischen Impulsgebers 17. Beim Verkleben der alten Bahn mit der neuen befindet sich die Klebewalze in der eingezeichneten ausgefahrenden Klebeposititon 4'. As in the arrangement according to FIG. 1, the separating device 10 is arranged in the gusset below the paper web 3 in the vicinity of the pressure roller 4. The knock-off knife 12 with the cutting blade 13 inclined against the web running direction is clamped in a clamp holder 14.
The part of the knock-off knife 12 which is not clamped can be moved in the vertical direction by the action of bending forces. The bracket 14 is fixedly attached to a support arm 15 of the separating device 10. Below the clamp bracket 14, a mechanical pulse generator 17 is pivotally mounted on the support arm 15 in a bearing 16. The mechanical pulse generator 17, which is pivotally or rotatably mounted in the bearing 16, is held elastically between the underside of the holder 14 and a support 18 by means of two deformable elements, for example elastic compressed air hoses, by means of a clamping effect. If the lower compressed air hose 19 is now filled and the upper compressed air hose 20 is emptied, the mechanical pulse generator 17 is pivoted about the axis of the bearing 16 and comes to a stop with the lower edge of the knock-off knife 12. Here, a pulse exchange takes place from the mechanical pulse generator to the knock-off knife. The clamped knife 12 is accelerated in the direction of the paper web and cuts it. Since the knife 12 is clamped in the holder 14, it is brought back into the starting position shown as a result of the tensioning of the knife as a result of the restoring force. Here, a stop 52 prevents the knife from overshooting in the direction of the mechanical pulse generator 17. When the old web is glued to the new one, the adhesive roller is in the drawn-out, extended adhesive position 4 '.

Weitere Ausführungsformen eines mechanischen Impulsgebers (siehe Figur 3) sowie eines pneumatischen Impulsgebers sind in den Figuren 4 und 5 schematisch dargestellt. Das Abschlagmesser 12 ist gemäß Fig. 3 in einem massiven Lagerblock 21 drehbar gelagert. Der Lagerbock 21 weist eine kreisrunde Bohrung 22 auf, die das Lager 16 des Abschlagmessers 12 aufnimmt. An die Lagerbohrung 22 schließt sich eine in den Lagerbock eingelassene V-förmige Aussparung 23 an. In der Ruheposition liegt das Messer 12 auf der Unterkante 24 der V-förmigen Aussparung 23 an. An den Lagerblock 21 ist mittels einer Halterung 25 ein mechanischer Impulsgeber 26 angebracht. Der mechanische Impulsgeber 26 umfaßt in dem vorliegenden Ausführungsbeispiel ein Zylinderteil 27, das mit Hilfe von Druckluft oder aber auch hydraulisch betrieben werden kann, sowie einen Stößel 28 der Masse m1, der auf einer Kolbenstange 29 des in den zylinderteil eingelassenen Kolbens aufgesetzt ist. Soll das Abschlagmesser betätigt werden, so wird der Zylinder 27 aus seiner dargestellten Ruheposition ausgelöst, die Masse m1 des Stößels auf die Geschwindigkeit V1 beschleunigt, mit der sie im Punkt 30 auf das ruhende, drehbar gelagerte Abschlagmesser auftrifft.
Durch den bevorzugt inelastischen Stoß wird der Impuls der Masse m1 praktisch vollständig auf die bewegliche Masse des Abschlagmessers m2 übertragen, das auf eine Geschwindigkeit V2 beschleunigt wird, sich um die Lagerachse in die gestrichelt eingezeichnete Position bewegt und dabei die Papierbahn 3 durchtrennt. Die Drehbewegung des Abschlagmessers 12 wird durch die Oberseite 31 des V-förmigen Ausschnittes 23 begrenzt. Ist die Papierbahn durchtrennt, so gelangt das Abschlagmesser durch Rückstellkräfte, bspw. die Schwerkraft in die Ausgangsposition, bei der sich das Abschlagmesser in Anlage mit der Unterseite 24 des V-förmigen Ausschnittes 23 befindet, und der Stößel 28 wird in die eingezeichnete Ausgangs- oder Ruheposition verfahren.Further embodiments of a mechanical pulse generator (see FIG. 3) and a pneumatic pulse generator are shown schematically in FIGS. 4 and 5. The tee knife 12 is rotatably supported in a solid bearing block 21 as shown in FIG. 3. The bearing block 21 has a circular bore 22 which receives the bearing 16 of the knock-off knife 12. The bearing bore 22 is followed by a V-shaped recess 23 embedded in the bearing block. In the rest position, the knife 12 rests on the lower edge 24 of the V-shaped recess 23. A mechanical pulse generator 26 is attached to the bearing block 21 by means of a holder 25. In the present exemplary embodiment, the mechanical pulse generator 26 comprises a cylinder part 27, which can be operated with the aid of compressed air or else hydraulically, and a plunger 28 of mass m 1 , which is placed on a piston rod 29 of the piston let into the cylinder part. If the tee knife is to be actuated, the cylinder 27 is released from its rest position shown, the mass m 1 of the ram accelerates to the speed V 1 with which it hits the stationary, rotatably mounted tee knife at point 30.
Due to the preferably inelastic impact, the momentum of the mass m 1 is practically completely transferred to the movable mass of the knock-off knife m 2 , which is accelerated to a speed V 2 , moves about the bearing axis into the position shown in broken lines and thereby cuts the paper web 3. The rotational movement of the knock-off knife 12 is limited by the upper side 31 of the V-shaped cutout 23. If the paper web is severed, the knock-off knife reaches the starting position by restoring forces, for example gravity, in which the knock-off knife is in contact with the underside 24 of the V-shaped cutout 23, and the plunger 28 is inserted into the starting or Move to rest position.

Fig. 4 zeigt ein weiteres Ausführungsbeispiel eines erfindungsgemäßen Abschlagmessers, mit einem pneumatischen Impulsgeber.Fig. 4 shows a further embodiment of an inventive Tee knife, with a pneumatic pulse generator.

Wie im Falle von Fig. 3 ist das Abschlagmesser 12 drehbar in einer Lagerung 22 in einem massiven Lagerblock 21 gelagert. Der Lagerblock 21 weist wie in Fig. 3 einen V-förmigen Ausschnitt 23 auf. In die Unterseite 24 des V-förmigen Ausschnittes 23 des Lagerblockes 21 sind in mehrere Öffnungen 40 eines Düsenkörpers hintereinander angeordnet. As in the case of FIG. 3, the tee knife 12 is rotatable in a bearing 22 in a massive bearing block 21 stored. The bearing block 21 has a V-shaped as in Fig. 3 Section 23 on. In the bottom 24 of the V-shaped cutout 23 of the Bearing block 21 are in a row in a plurality of openings 40 of a nozzle body arranged.

Die Öffnungen 40 sind über Kanäle 41 mit einer in den Lagerblock 21 eingelassenen Druckspeicherkammer 43 verbunden, in welcher ein Druckluftschlauch 42 liegt. In der Ruheposition befindet sich das Abschlagmesser in Anlage mit der Unterseite des V-förmigen Ausschnittes 24. Soll das Messer betätigt werden, so strömt bei Entlüftung des Druckluftschlauches 42 aus der Druckluftspeicherkammer 43 Druckluft durch den Kanal 41 zur Öffnung 40. Durch den mit der Strömung mitgeführten Impuls wird das Abschlagmesser 12 betätigt und auf eine Geschwindigkeit V2 beschleunigt, wodurch die Papierbahn 3 durchtrennt wird. Die Drehbewegung des Messers 12 wird durch die Oberseite 31 des V-förmigen Ausschnittes 23 wie in Fig. 3 begrenzt.The openings 40 are connected via channels 41 to a pressure storage chamber 43 which is embedded in the bearing block 21 and in which a compressed air hose 42 lies. In the rest position, the knock-off knife is in contact with the underside of the V-shaped cutout 24. If the knife is to be actuated, when the compressed air hose 42 is vented, compressed air flows out of the compressed air storage chamber 43 through the duct 41 to the opening 40. Through the flow the pulse carried along is actuated and accelerated to a speed V 2 , whereby the paper web 3 is severed. The rotational movement of the knife 12 is limited by the upper side 31 of the V-shaped cutout 23 as in FIG. 3.

Anstelle des Druckluftschlauches 42 können auch Ventile (nicht in der Figur dargestellt) die Ausströmung aus der Druckluftspeicherkammer 43 auslösen. Die Ventile werden dazu zweckmäßigerweise in die Kanäle 41 jeweils integriert.Instead of the compressed air hose 42, valves (not in the figure shown) trigger the outflow from the compressed air storage chamber 43. The Valves are expediently integrated into the channels 41 for this purpose.

Optional wäre es gemäß der in Fig. 5 dargestellten Ausführungsform auch möglich, eine Energiespeichervorrichtung bzw. ein Energiespeichersystem mit einer Impulsaustauschvorrichtung bspw. gem. Fig. 3 oder Fig. 4 zu kombinieren. Als Energiespeicher findet gem. Fig. 5 eine Feder 50 Verwendung. Auch andere Energiespeicher wie befüllte elastische Druckluftschläuche etc. wären denkbar.Optionally, according to the embodiment shown in FIG. 5, it would also be possible an energy storage device or an energy storage system with a Pulse exchange device, for example according to Fig. 3 or Fig. 4 to combine. As Energy storage takes place according to Fig. 5 a spring 50 use. Others too Energy stores such as filled elastic compressed air hoses etc. would be conceivable.

Die Feder befindet sich im komprimierten Zustand, wenn das Abschlagmesser wie dargestellt die Ruheposition einnimmt. Damit das Messer durch die in der Feder gespeicherte Energie nicht ungewollt betätigt wird, wird das Abschlagmesser durch einen Niederhalter 51 in der dargestellten Position fixiert. Löst man das Messer aus, so wird zeitlich aufeinander abgestimmt das Abschlagmesser mit einem Strömungsimpuls beaufschlagt und der Niederhalter 51 in die gestrichelt dargestellte Position verschwenkt, wodurch die in der Feder gespeicherte Energie schlagartig freigesetzt wird und das Abschlagmesser noch zusätzlich zum Impulsaustausch beschleunigt wird.The spring is in the compressed state when the hitting knife is like shown occupies the rest position. So that the knife through the in the spring stored energy is not operated unintentionally, the knock-off knife a hold-down device 51 is fixed in the position shown. If you release the knife, so the timing knife is coordinated with one another with a flow impulse acted upon and the hold-down 51 in the position shown in dashed lines pivoted, whereby the energy stored in the spring is released suddenly and the tee knife is accelerated in addition to the pulse exchange.

Mit der vorliegenden Erfindung ist es somit erstmals möglich, auch bei mit hoher Geschwindigkeit laufenden Warenbahnen eine einwandfreie Durchtrennung der Papierbahn zu erzielen, so daß Schwierigkeiten bei der nachfolgenden Verarbeitung beispielsweise in einer Klebevorrichtung bzw. einer Streichmaschine verhindert werden.With the present invention it is thus possible for the first time, even with high Speed running webs a perfect severing of the To achieve paper web, so that difficulties in the subsequent processing prevented, for example, in an adhesive device or a coating machine become.

Claims (10)

  1. Apparatus for chopping through a moving material web, in particular paper webs, at high web speeds, having
    1.1 a movable chopping knife (12),
    1.2 the cutting blade (13) of the chopping knife (12) being arranged underneath the material web (3) in the interspace between the material web (3) and a pressure roller (4), at a short distance from a nip (5) formed by the pressure roller (4) and a roll (1),
    characterized in that
    1.3 the chopping knife (12) is assigned an actuating apparatus which comprises at least one energy exchange apparatus (11).
  2. Apparatus according to Claim 1, characterized in that the energy exchange apparatus (11) is a mechanical energy source (26, 27) into which the energy transfer is carried out by the impact of a mass on an impact body.
  3. Apparatus according to Claim 1 and 2, characterized in that the mass of the chopping knife (m2) is very much lower than the mass of the impact body (m1).
  4. Apparatus according to Claim 1, characterized in that the energy exchange apparatus is a pneumatic energy source, with which the energy exchange is carried out by a flow acting on the knife (12).
  5. Apparatus according to Claim 4, characterized in that the flow is a compressed-air flow.
  6. Apparatus according to one of Claims 1 to 5, characterized in that the actuating apparatus comprises an energy storage apparatus (50).
  7. Apparatus according to Claim 6, characterized in that the energy storage apparatus (50) is a compressed-air system.
  8. Apparatus according to one of Claims 1 to 7, characterized in that the cutting blade (13) of the chopping knife (12) is inclined in the direction opposite to the web running direction.
  9. Apparatus according to Claim 8, characterized in that the cutting blade (13) of the chopping knife (12) is inclined in such a way that the angle which results between the chopping knife and the material web (3) during the cutting operation is less than 45 degrees.
  10. Apparatus according to Claim 9, characterized in that the cutting blade (13) of the chopping knife (12) is inclined in the direction opposite to the web running direction during the cutting operation, and the angle which results between the chopping knife and the material web (3) during the cutting operation, and the speed of the material web and the feed speed of the chopping knife, are coordinated with each other in such a way that the cut edge on the material web is approximately a straight line.
EP97105845A 1996-04-19 1997-04-09 Device for severing a running web Expired - Lifetime EP0802138B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19615370A DE19615370A1 (en) 1996-04-19 1996-04-19 Method and device for cutting a running web
DE19615370 1996-04-19

Publications (3)

Publication Number Publication Date
EP0802138A2 EP0802138A2 (en) 1997-10-22
EP0802138A3 EP0802138A3 (en) 1998-05-13
EP0802138B1 true EP0802138B1 (en) 2001-10-24

Family

ID=7791668

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97105845A Expired - Lifetime EP0802138B1 (en) 1996-04-19 1997-04-09 Device for severing a running web

Country Status (6)

Country Link
US (1) US6173636B1 (en)
EP (1) EP0802138B1 (en)
KR (1) KR970070334A (en)
CN (1) CN1171323A (en)
DE (2) DE19615370A1 (en)
ID (1) ID17638A (en)

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EP0936166A1 (en) * 1998-02-10 1999-08-18 E.I. Du Pont De Nemours And Company High speed cutting assembly
DE19914524A1 (en) * 1999-03-30 2000-10-05 Voith Sulzer Papiertech Patent Apparatus for cutting a moving continuous sheet of material into lengths comprises a blade carrier and/or at least one actuator element made at least partially of a composite material
EP1072946B1 (en) * 1999-07-27 2006-03-01 Noritsu Koki Co., Ltd. Cutting mechanism for sheet-like conveyed material in a photographic processing apparatus
FI117281B (en) * 2002-12-18 2006-08-31 Metso Paper Inc cutting device
ITFI20030118A1 (en) * 2003-04-28 2004-10-29 Fabio Perini DEVICE AND METHOD TO CAUSE THE TAPPING OF PAPER TAPES IN REWINDING MACHINES
US7250440B2 (en) 2003-08-12 2007-07-31 Wyeth (Hydroxyphenyl)-1H-indole-3-carbaldehyde oxime derivatives as estrogenic agents
DE102011007457A1 (en) * 2011-04-15 2012-10-18 Robert Bosch Gmbh Method and device for connecting two film webs
CN102788799A (en) * 2012-07-27 2012-11-21 昆山微容电子企业有限公司 Automatic appearance screening device

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US3591279A (en) * 1969-06-02 1971-07-06 Xerox Corp Cut and deflect web drive apparatus
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JPS4912329B1 (en) * 1970-02-17 1974-03-23
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DE9413363U1 (en) * 1994-08-22 1994-11-03 Voith Gmbh J M Device for cross cutting a running web

Also Published As

Publication number Publication date
ID17638A (en) 1998-01-15
DE59705026D1 (en) 2001-11-29
DE19615370A1 (en) 1997-10-23
KR970070334A (en) 1997-11-07
CN1171323A (en) 1998-01-28
EP0802138A2 (en) 1997-10-22
EP0802138A3 (en) 1998-05-13
US6173636B1 (en) 2001-01-16

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