EP1132196B1 - Device for controlling web tension - Google Patents
Device for controlling web tension Download PDFInfo
- Publication number
- EP1132196B1 EP1132196B1 EP01105065A EP01105065A EP1132196B1 EP 1132196 B1 EP1132196 B1 EP 1132196B1 EP 01105065 A EP01105065 A EP 01105065A EP 01105065 A EP01105065 A EP 01105065A EP 1132196 B1 EP1132196 B1 EP 1132196B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- plastic film
- film web
- web
- wall surface
- pipe
- 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
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/02—Feeding or positioning sheets, blanks or webs
- B31B70/10—Feeding or positioning webs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2160/00—Shape of flexible containers
- B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
Definitions
- the invention relates to a device for web tension control for a continuous by a preferred pair of rollers and a pair of drawing roller plastic web in the course of producing a perforated weld having bags, with at least one Perforationssch dowerkmaschine and a web tension control device having support frame and a Messertgeber and with on one side of the Plastic film web arranged guide rollers and arranged on the other side of the plastic film blowing tube, which is in communication with a compressed air source and that the blowpipe has at least on the plastic film web side facing at least one air outlet opening and that the blowpipe cooperates with the transmitter, which at least with a drive of the feed roller pair and / or preferably the take-off roller pair is in communication.
- the blowpipe can be between the compressed air outlet openings and the plastic film sheet form an air cushion, with the result that the plastic film sheet occupies a more or less large distance from the blowpipe depending on the pressurization.
- This distance is determined by a transmitter and the control pulse thus generated is directed to a drive of either the preferred pair of rollers and / or preferably the pair of take-off rollers. In this way, for example, if the tension in the plastic film web is too high, the take-off roller pair can be driven at a lower speed, resulting in a corresponding stress compensation in the plastic film web.
- the invention has for its object to provide a device suitable for web tension control device of the type mentioned, which avoids annoying whistling with little effort and ensures optimal control.
- the wall surface can be, for example, part of a square tube arranged below the plastic film web and extending at least over its width.
- the outside of the wall surface and the vertex facing the peripheral surface of the Guiding rollers arranged at least in a common plane. If necessary, the outside of the wall surface of the square tube may be slightly offset in the direction of the guide rollers.
- the wall surface of the square tube seen in the web running direction has a width which is slightly smaller than the distance between the outer periphery of the two located on the opposite side of the plastic film guide rollers
- the width of the longitudinal slot can be about 1/5 of Width of the air outlet wall surface of the square tube amount.
- the air cushion which builds up between the wall surface of the square tube and the plastic film web is quite smooth and clean, so that optimum regulation is ensured, so that the distances or the length between adjacent bags or web sections is always correctly maintained.
- the square tube can be produced particularly inexpensively and you can determine the distance between the wall surface and the air outlet track, for example from above by means of a suitable measuring device, such as a UltraschallMesswertgebers particularly simple or measure due to the arrangement of the square tube.
- the air outlet opening as a slot or longitudinal slot and a substantial simplification in changing widths of the plastic film web is achieved and indeed in that the unneeded portions of the longitudinal slot can be closed by one or more cover elements, which are advantageously designed as a magnetic strip.
- One in the FIGS. 1 to 3 shown device for web tension control is arranged in the region of a plastic film web 1, which is continuously moved by a feed roller pair 2 and a pair of take-off rollers 3 in the direction of arrow 4.
- the take-off roller pair 3 is driven by a drive, not shown, at a peripheral speed which is greater than the drive speed of the feed roller pair 2, they may be greater in the embodiment and according to the preferred embodiment of the invention by 1% to 2%.
- Perforationssch spaticianmaschinemaschines 5 can be transverse to the plastic film web at certain intervals perforation welds bring so that arise bag sections that are related to the perforation weld and can be wound in a manner not shown to a roll of bags. But there are also bottom seam bag in question.
- the device shown in the figures for web tension control has a support frame 6, on which arranged on one side of the plastic film web and the support frame 6 freely rotatably mounted guide rollers 7, 8 are arranged.
- a square tube 9 In the area between the guide rollers, but on the opposite side of the plastic film web 1 is a square tube 9, which has a wall surface 11 with a longitudinal slot 12 located therein on its side facing the plastic film web.
- compressed air connections 13 are provided, can be introduced via the compressed air from a compressed air source, not shown.
- a cross plate 17 ' Approximately in the central region of the interior of the square tube 9 is closed by a cross plate 17 ', so that two spaces arise, each having its own compressed air connection 13.
- an air cushion can be constructed between the wall surface 11 and the plastic film web 1, so that the plastic film web 1 in the region of the wall surface 11 has a more or less large, a few millimeters distance.
- This distance can be with the help of a Measuring transmitter, for example, an ultrasonic transducer 14, which sits in an angle piece 15, which in turn is adjustably mounted on a guide rod 16.
- the outside of the wall surface 11 and the outermost vertex of the peripheral surfaces of the guide rollers 7, 8 are arranged in the region of the plastic film web 1 such that these surfaces lie substantially in a same plane.
- the wall surface 11 is slightly displaced in the direction of the guide rollers 7, 8, so that the plastic film web 1 in the region of the wall surface 11 has a bulge.
- the dimensions of the square tube and the guide rollers are coordinated insofar as the width of the wall surface 11 in the direction of movement 4 of the plastic film 1 is smaller than the distance between the outer peripheries of the guide rollers 7, 8 and the width of the longitudinal slot 12 about 1/5 of the aforementioned width of the square tube 9 makes.
- the invention is not limited to the illustrated embodiment, but within the scope of the claims permits modifications.
- the distance measured by the ultrasonic transducer 14 to the bulge of the plastic film web 1 not only give a measuring pulse via the line 18 to the drive of the pair of withdrawal rollers 3, not shown, but in principle this also works if, accordingly, the feed roller pair 2 is controlled.
- two perforation welding tools can also be provided. In this case, the support frame 6 of the web tension control device is arranged between the two perforation welding tools.
Landscapes
- Making Paper Articles (AREA)
- Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Containers And Plastic Fillers For Packaging (AREA)
Description
Die Erfindung bezieht sich auf eine Vorrichtung zur Bahnspannungsregelung für eine durch ein Vorzugswalzenpaar und ein Abzugswalzenpaar fortlaufend bewegte Kunststoffolienbahn im zuge der Herstellung von eine Perforationsschweißnaht aufweisenden Beuteln, mit wenigstens einem Perforationsschweißwerkzeug und einem eine Bahnspannungsregelungseinrichtung aufweisenden Traggestell sowie einem Messertgeber und mit auf der einen Seite der Kunststofffolienbahn angeordneten Führungswalzen und mit einem auf der anderen Seite der Kunststofffolienbahn angeordneten Blasrohr, das mit einer Druckluftquelle in Verbindung steht und dass das Blasrohr wenigstens auf der der Kunststofffolienbahn zugewandten Seite mindestens eine Luftaustrittsöffnung aufweist und dass das Blasrohr mit dem Messwertgeber zusammenwirkt, der mit wenigstens mit einem Antrieb des Vorzugswalzenpaars und/oder vorzugsweise des Abzugswalzenpaars in Verbindung steht.The invention relates to a device for web tension control for a continuous by a preferred pair of rollers and a pair of drawing roller plastic web in the course of producing a perforated weld having bags, with at least one Perforationsschweißwerkzeug and a web tension control device having support frame and a Messertgeber and with on one side of the Plastic film web arranged guide rollers and arranged on the other side of the plastic film blowing tube, which is in communication with a compressed air source and that the blowpipe has at least on the plastic film web side facing at least one air outlet opening and that the blowpipe cooperates with the transmitter, which at least with a drive of the feed roller pair and / or preferably the take-off roller pair is in communication.
Bei der Herstellung von Beuteln mit Perforationsschweißnähten ist es erforderlich, dass insbesondere im Bereich des Perforationsschweißwerkzeuges die Bahnspannung in der Kunststofffolienbahn bestimmte Werte nicht überschreitet. Ist die Bahnspannung nämlich zu groß, so werden die über die Perforationsschweißnähte aneinander angeschlossenen Bahnabschnitte bei der Herstellung beispielsweise von Beutelrollen im Bereich der Perforationsschweißungen auseinandergezogen, was die Schweißnahtqualität erheblich beeinträchtigt. Dies geschieht häufig schon bei verhältnismäßig kleinen Bahnspannungen, da die Kunststofffolienbahn im Bereich der gerade angebrachten Perforationsschweißnähte noch erhöhte Temperatur aufweist und dadurch mehr oder weniger plastifiziert ist.In the production of bags with perforated welds, it is necessary that, especially in the region of the perforation welding tool, the web tension in the plastic film web does not exceed certain values. If the web tension is in fact too large, the web sections connected to one another via the perforation weld seams are pulled apart in the production of, for example, bag rolls in the region of the perforation welds, which considerably impairs the weld seam quality. This often happens even at relatively low web tension, since the plastic film web in the region of the perforation welds just mounted still has elevated temperature and is thus more or less plasticized.
Um diese Nachteile zu vermeiden bzw. so gering wie möglich zu halten, wird in der unter der Patentnummer
Es hat sich nun gezeigt, dass bei der bekannten Bahnspannungsregelungseinrichtung durch den vergleichsweise großen Umschlingungswinkel der Kunststofffolienbahn eine vergleichsweise große Reibung auftritt, mit der Folge, dass ein Schlupf am Abzugswalzenpaar auftritt und/oder sich der Durchhang bzw. die Lose sich nicht am Blasrohr bildet, sondern am Einzugswalzenpaar. Die Folge hierbei sind Störungen und Abrisse und vor allen Dingen auch unterschiedliche Beutellängen und dergleichen. Vor allen Dingen kommt es beim Richten und im Lauf der Kunststofffolienbahn zu erheblichen Pfeifgeräuschen. Schließlich ist die Regelung unsauber, insbesondere bei dicken und mehrlagigen Folienbahnen. Aufgrund der versetzt angeordneten Luftaustrittsöffnungen bildet sich ein welliges Luftpolster, woraus eine ungenaue Messung resultiert. Ferner muß die Umschlingung des Blasrohrs beim Einsatz eines zweiten Perforationsschweißwerkzeuges berücksichtigt werden. Darüber hinaus läßt sich der Durchhang aufgrund der Anordnung des Blasrohres oberhalb der Kunststofffolienbahn nur recht schlecht von unten beobachten. Letztendlich ist auch die Anpassung des bekannten Blasrohres an unterschiedliche Bahnbreiten nur mit Schwierigkeiten durchzuführen, da in diesem Fall die nicht benötigten Teilbereiche der Luftaustrittsöffnungen abgeklebt werden müssen, was zu noch höheren Geräuschentwicklungen führt.It has been shown that in the known web tension control device by the comparatively large wrap angle of the plastic film web a comparatively large friction occurs, with the result that a slip occurs on the pair of withdrawal rollers and / or the slack or the loose does not form on the blowpipe, but at the intake roller pair. The result here are disturbances and breaks and above all different bag lengths and the like. Above all, it comes in straightening and in the course of the plastic film to considerable whistling noises. Finally, the scheme is dirty, especially in thick and multi-layer film webs. Due to the staggered air outlet openings forms a wavy air cushion, resulting in an inaccurate measurement results. Furthermore, the wrap of the blowpipe must be taken into account when using a second Perforationsschweißwerkzeuges. In addition, due to the arrangement of the blower tube above the plastic film web, the slack can only be observed quite poorly from below. Finally, the adaptation of the known blower tube to different web widths is difficult to perform, since in this case the unused portions of the air outlet openings must be taped, resulting in even higher noise levels.
Aus der
Als gattungsgemäßer Stand der Technik ist aus der deutschen Offenlegungsschrift
Der Erfindung liegt die Aufgabe zugrunde, eine zur Bahnspannungsregelung geeignete Vorrichtung der eingangs genannten Art zu schaffen, die mit geringem Aufwand störende Pfeifgeräusche vermeidet und eine optimale Regelung gewährleistet.The invention has for its object to provide a device suitable for web tension control device of the type mentioned, which avoids annoying whistling with little effort and ensures optimal control.
Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1. Die Wandfläche kann beispielsweise Teil eines unterhalb der Kunststofffolienbahn angeordneten, sich wenigstens über deren Breite erstreckenden Vierkantrohres sein. Dabei sind die Außenseite der Wandungsfläche und der dieser zugewandte Scheitelpunkt der Umfangsfläche der Führungswalzen zumindest in einer gemeinsamen Ebene angeordnet. Erforderlichenfalls kann die Außenseite der Wandfläche des Vierkantrohres geringfügig in Richtung der Führungswalzen versetzt liegen.This object is achieved according to the invention by the features of claim 1. The wall surface can be, for example, part of a square tube arranged below the plastic film web and extending at least over its width. In this case, the outside of the wall surface and the vertex facing the peripheral surface of the Guiding rollers arranged at least in a common plane. If necessary, the outside of the wall surface of the square tube may be slightly offset in the direction of the guide rollers.
Besonders günstige Ergebnisse haben sich gezeigt, wenn die Wandfläche des Vierkantrohres in Bahnlaufrichtung gesehen eine Breite aufweist, die etwas kleiner als der Abstand zwischen dem Außenumfang der beiden auf der gegenüberliegenden Seite der Kunststofffolienbahn gelegenen Führungswalzen ist Die Breite des Längsschlitzes kann dabei etwa 1/5 der Breite der Luftaustritts-Wandfläche des Vierkantrohres betragen.Particularly favorable results have been found when the wall surface of the square tube seen in the web running direction has a width which is slightly smaller than the distance between the outer periphery of the two located on the opposite side of the plastic film guide rollers The width of the longitudinal slot can be about 1/5 of Width of the air outlet wall surface of the square tube amount.
Mit den Mitteln der Erfindung kommt man zu einer Bahnspannungsregelungseinrichtung, bei der keinerlei Geräuschentwicklung an der Kunststofffolienbahn mehr auftritt. Das sich zwischen der Wandfläche des Vierkantrohres und der Kunststofffolienbahn aufbauende Luftpolster ist ganz glatt und sauber, so dass eine optimale Regelung gewährleistet ist, so dass auch die Abstände bzw. die Länge zwischen benachbarten Beuteln bzw. Bahnabschnitten stets korrekt eingehalten wird. Das Vierkantrohr läßt sich besonders preisgünstig herstellen und man kann aufgrund der Anordnung des Vierkantrohres den Abstand zwischen dessen Wandfläche und der Luftaustrittsbahn, beispielsweise von oben her mittels eines geeigneten Meßgerätes, beispielsweise eines UltraschallMesswertgebers besonders einfach feststellen bzw. messen.With the means of the invention to get to a web tension control device in which no noise on the plastic film web occurs more. The air cushion which builds up between the wall surface of the square tube and the plastic film web is quite smooth and clean, so that optimum regulation is ensured, so that the distances or the length between adjacent bags or web sections is always correctly maintained. The square tube can be produced particularly inexpensively and you can determine the distance between the wall surface and the air outlet track, for example from above by means of a suitable measuring device, such as a UltraschallMesswertgebers particularly simple or measure due to the arrangement of the square tube.
In Folge der Ausbildung der Luftaustrittsöffnung als Langloch bzw. Längsschlitz ist auch eine wesentliche Vereinfachung bei sich ändernden Breiten der Kunststofffolienbahn erzielbar und zwar dadurch, dass die nicht benötigten Teilbereiche des Längsschlitzes durch ein oder mehrere Abdeckelemente verschließbar sind, die vorteilhafterweise als Magnetstreifen ausgebildet sind.As a result of the formation of the air outlet opening as a slot or longitudinal slot and a substantial simplification in changing widths of the plastic film web is achieved and indeed in that the unneeded portions of the longitudinal slot can be closed by one or more cover elements, which are advantageously designed as a magnetic strip.
Ein bevorzugtes Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher erläutert. Es zeigen:
- Figur 1
- eine Seitenansicht einer Spannungsregelungs-Einrichtung,
- Figur 2
- die zugehörige Vorderansicht und
- Figur 3
- die zugehörige Draufsicht.
- FIG. 1
- a side view of a voltage regulation device,
- FIG. 2
- the associated front view and
- FIG. 3
- the corresponding top view.
Eine in den
Mit Hilfe eines in
Damit das Einbringen der Perforationsschweißnähte und deren weiterer Transport durch die Anlage weitgehend spannungsfrei erfolgen kann, ist die in den Figuren dargestellte Vorrichtung zur Bahnspannungsregelung vorgesehen. Diese Vorrichtung weist ein Traggestell 6 auf, an dem auf der einen Seite der Kunststofffolienbahn angeordnete und am Traggestell 6 frei drehbar gelagerte Führungswalzen 7, 8 angeordnet sind. Im Bereich zwischen den Führungswalzen, aber auf der gegenüberliegenden Seite der Kunststofffolienbahn 1 befindet sich ein Vierkantrohr 9, das auf seiner der Kunststofffolienbahn zugewandten Seite eine Wandungsfläche 11 mit einem darin befindlichen Längsschlitz 12 aufweist. Auf der dem Längsschlitz 12 gegenüberliegenden Seite sind Druckluftanschlüsse 13 vorgesehen, über die Druckluft aus einer nicht dargestellten Druckluftquelle eingebracht werden kann. Etwa im mittleren Bereich ist der Innenraum des Vierkantrohres 9 durch ein Querblech 17' verschlossen, so dass zwei Räume entstehen, die jeweils einen eigenen Druckluftanschluß 13 aufweisen.Thus, the introduction of perforation welds and their further transport through the system can be largely free of stress, the device shown in the figures for web tension control is provided. This device has a
Durch entsprechende Druckbeaufschlagung kann zwischen der Wandungsfläche 11 und der Kunststofffolienbahn 1 ein Luftpolster aufgebaut werden, so dass die Kunststofffolienbahn 1 im Bereich der Wandfläche 11 einen mehr oder weniger großen, wenige Millimeter betragenden Abstand aufweist. Dieser Abstand läßt sich mit Hilfe eines Messwertgebers, beispielsweise eines Ultraschallgebers 14 messen, der in einem Winkelstück 15 sitzt, das seinerseits an einer Führungsstange 16 verstellbar gelagert ist.By appropriate pressurization, an air cushion can be constructed between the wall surface 11 and the plastic film web 1, so that the plastic film web 1 in the region of the wall surface 11 has a more or less large, a few millimeters distance. This distance can be with the help of a Measuring transmitter, for example, an
Die Außenseite der Wandfläche 11 und der äußerste Scheitelpunkt der Umfangsflächen der Führungswalzen 7, 8 sind im Bereich der Kunststofffolienbahn 1 derart angeordnet, dass diese Flächen im wesentlichen in einer gleichen Ebene liegen. Vorzugsweise ist die Wandfläche 11 geringfügig in Richtung der Führungswalzen 7, 8 verschoben, so dass die Kunststofffolienbahn 1 im Bereich der Wandfläche 11 eine Ausbuchtung aufweist.The outside of the wall surface 11 and the outermost vertex of the peripheral surfaces of the
Die Abmessungen des Vierkantrohres und der Führungswalzen sind insofern aufeinander abgestimmt, als die Breite der Wandfläche 11 in Bewegungsrichtung 4 der Kunststofffolienbahn 1 kleiner als der Abstand zwischen den Außenumfängen der Führungswalzen 7, 8 ist und die Breite des Längsschlitzes 12 etwa 1/5 der vorgenannten Breite des Vierkantrohres 9 ausmacht.The dimensions of the square tube and the guide rollers are coordinated insofar as the width of the wall surface 11 in the direction of movement 4 of the plastic film 1 is smaller than the distance between the outer peripheries of the
Für den Fall, dass der Längsschlitz 12 nicht vollständig für die Beaufschlagung der Kunststofffolienbahn benötigt wird, weil diese schmaler als der Längsschlitz 12 ist, so werden die nicht benötigten Bereiche des Vierkantrohres 9 durch Abdeckelemente in Form von Magnetstreifen 17 abgedeckt.In the event that the
Es versteht sich, dass sich die Erfindung nicht nur auf das dargestellte Ausführungsbeispiel beschränkt, sondern im Rahmen der Ansprüche Abänderungen zuläßt. So kann der von dem Ultraschallgeber 14 gemessene Abstand zur Ausbuchtung der Kunststofffolienbahn 1 nicht nur einen Meßimpuls über die Leitung 18 auf den nicht dargestellten Antrieb des Abzugswalzenpaars 3 geben, sondern grundsätzlich funktioniert dies auch, wenn entsprechend das Vorzugswalzenpaar 2 geregelt wird. Schließlich können anstelle eines Perforationsschweißwerkzeuges 5 auch zwei Perforationsschweißwerkzeuge vorgesehen sein. In diesem Fall ist das Traggestell 6 der Bahnspannungsregelungsvorrichtung zwischen den beiden Perforationsschweißwerkzeugen angeordnet.It is understood that the invention is not limited to the illustrated embodiment, but within the scope of the claims permits modifications. Thus, the distance measured by the
Claims (7)
- Apparatus for controlling web tension for a plastic film web (1) which is moved continuously through an advance roller pair (2) and a haul-off roller pair (3) during the production of bags which have a perforated welded seam, having at least one perforating welding tool (5) and a carrying frame (6) which has a web tension control device with guide rollers (7) which are arranged on one side of the plastic film web (1) and with a blower pipe (9) which is arranged on the other side of the plastic film web (1), is connected to a compressed air source, has at least one air outlet opening (12) at least on the side which faces the plastic film web (1) and interacts with a measured-value sensor (14) which is connected to a drive of the advance roller pair (2) and/or preferably of the haul-off roller pair (3), characterized in that the blower pipe is a polygonal pipe (9), the polygonal pipe (9) having a wall surface (11) which extends substantially parallel to the plastic film web (1) on its side which faces the plastic film web (1) and has the air outlet opening (12), in that the wall surface (11) is a part of the polygonal pipe (9) which is arranged below the plastic film web (1) and extends at least over its width, and in that, in the wall surface (11) which faces the plastic film web (1), the polygonal pipe (9) has a longitudinal slot (12), as air outlet opening, which extends substantially over the entire length of the polygonal pipe (9), with the result that an air cushion of a few millimetres can be built up between the wall surface (11) and the plastic film web (1).
- Apparatus according to Claim 1, characterized in that the polygonal pipe is a square pipe (9).
- Apparatus according to either of Claims 1 and 2, characterized in that the outer side of the wall surface (11) and the vertex, which faces it, of the circumferential surfaces of the guide rollers (7, 8) are arranged substantially in a common plane or in a plane which is displaced in the direction of the guide rollers.
- Apparatus according to either of Claims 2 and 3, characterized in that the wall surface (11) of the square pipe (9) has a width, as viewed in the web running direction of the plastic film web, which is somewhat smaller than the spacing between the external circumference of the two guide rollers (7, 8) which lie on the opposite side of the plastic film web (1).
- Apparatus according to one or more of Claims 2 to 4, characterized in that the width of the longitudinal slot (12) is approximately 1/5 of the width of the air outlet wall surface (11) of the square pipe (9).
- Apparatus according to one or more of Claims 1 to 5, characterized in that a partial region of the longitudinal slot (12) which is not required can be closed by at least one covering element (17).
- Apparatus according to Claim 6, characterized in that the covering element or elements is/are formed by a magnetic strip (17).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10011943A DE10011943B4 (en) | 2000-03-11 | 2000-03-11 | Device for web tension control |
DE10011943 | 2000-03-11 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1132196A2 EP1132196A2 (en) | 2001-09-12 |
EP1132196A3 EP1132196A3 (en) | 2002-07-17 |
EP1132196B1 true EP1132196B1 (en) | 2008-07-02 |
Family
ID=7634384
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01105065A Expired - Lifetime EP1132196B1 (en) | 2000-03-11 | 2001-03-02 | Device for controlling web tension |
Country Status (4)
Country | Link |
---|---|
US (1) | US6564983B2 (en) |
EP (1) | EP1132196B1 (en) |
DE (2) | DE10011943B4 (en) |
ES (1) | ES2309016T3 (en) |
Families Citing this family (4)
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US20040098862A1 (en) * | 2002-08-21 | 2004-05-27 | Eveready Battery Company, Inc. | Razor system having razor sensors |
US6759816B2 (en) * | 2002-08-30 | 2004-07-06 | International Business Machines Corporation | Tape drive with non-contact optical tape tension sensor |
DE10246437A1 (en) * | 2002-10-04 | 2004-04-15 | Focke Gmbh & Co. Kg | Packaging film checking device for checking for the correct position of the tearing-off strip in packaging film comprises ultrasonic transmitter and receiver focussed on the area of the tearing-off strip |
CN110406171B (en) * | 2019-08-16 | 2020-05-15 | 山东鑫亮包装科技股份有限公司 | Bag making process for packaging plastic film |
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US3861207A (en) * | 1973-12-20 | 1975-01-21 | Eastman Kodak Co | Apparatus for measuring web tension |
DE3936038C2 (en) * | 1989-10-28 | 1995-04-20 | Stiegler Maschf Gmbh | Device for transferring an intermittently moving web into a continuously moving web, in particular for the production of bag chains from thermoplastic film |
JPH05322681A (en) * | 1992-05-18 | 1993-12-07 | Tokyo Kikai Seisakusho Ltd | Tension detection method/device and tension controller |
US5392977A (en) * | 1993-11-09 | 1995-02-28 | Sankyo Seisakusho Co. | Coil material supply apparatus for an intermittent feed device |
US5709352A (en) * | 1996-07-29 | 1998-01-20 | R. J. Reynolds Tobacco Company | Zero tension web unwinder apparatus and method |
US6095391A (en) * | 1998-08-04 | 2000-08-01 | Roll Systems, Inc. | Method and apparatus for loop stabilization with forced air |
-
2000
- 2000-03-11 DE DE10011943A patent/DE10011943B4/en not_active Expired - Fee Related
-
2001
- 2001-03-02 EP EP01105065A patent/EP1132196B1/en not_active Expired - Lifetime
- 2001-03-02 ES ES01105065T patent/ES2309016T3/en not_active Expired - Lifetime
- 2001-03-02 DE DE50114061T patent/DE50114061D1/en not_active Expired - Lifetime
- 2001-03-08 US US09/802,122 patent/US6564983B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE50114061D1 (en) | 2008-08-14 |
EP1132196A3 (en) | 2002-07-17 |
EP1132196A2 (en) | 2001-09-12 |
DE10011943B4 (en) | 2006-07-06 |
DE10011943A1 (en) | 2001-09-20 |
US20020000458A1 (en) | 2002-01-03 |
ES2309016T3 (en) | 2008-12-16 |
US6564983B2 (en) | 2003-05-20 |
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