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EP0397039A1 - Device for separating a tearing strip from a tape and for applying the same to a web of packaging material - Google Patents

Device for separating a tearing strip from a tape and for applying the same to a web of packaging material Download PDF

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Publication number
EP0397039A1
EP0397039A1 EP90108405A EP90108405A EP0397039A1 EP 0397039 A1 EP0397039 A1 EP 0397039A1 EP 90108405 A EP90108405 A EP 90108405A EP 90108405 A EP90108405 A EP 90108405A EP 0397039 A1 EP0397039 A1 EP 0397039A1
Authority
EP
European Patent Office
Prior art keywords
suction
packaging material
tear strip
knife
suction air
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.)
Granted
Application number
EP90108405A
Other languages
German (de)
French (fr)
Other versions
EP0397039B1 (en
Inventor
Hans-Peter Eicker
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.)
Maschinenfabrik Alfred Schmermund GmbH and Co
Original Assignee
Maschinenfabrik Alfred Schmermund GmbH and Co
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
Application filed by Maschinenfabrik Alfred Schmermund GmbH and Co filed Critical Maschinenfabrik Alfred Schmermund GmbH and Co
Publication of EP0397039A1 publication Critical patent/EP0397039A1/en
Application granted granted Critical
Publication of EP0397039B1 publication Critical patent/EP0397039B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • 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
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/74—Auxiliary operations
    • B31B50/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B50/812—Applying tabs, patches, strips or strings on blanks or webs
    • B31B50/8125—Applying strips or strings, e.g. tear strips or strings
    • B31B50/8126—Applying strips or strings, e.g. tear strips or strings parallel to the direction of movement of the webs or the blanks
    • 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
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/74—Auxiliary operations
    • B31B50/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B50/812—Applying tabs, patches, strips or strings on blanks or webs
    • B31B50/8125—Applying strips or strings, e.g. tear strips or strings
    • B31B50/8129—Applying strips or strings, e.g. tear strips or strings the webs or blanks moving during application of the strips or strings
    • 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
    • Y10S493/00—Manufacturing container or tube from paper; or other manufacturing from a sheet or web
    • Y10S493/916—Pliable container
    • Y10S493/93—Pliable container having tear strip
    • 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
    • Y10S493/00—Manufacturing container or tube from paper; or other manufacturing from a sheet or web
    • Y10S493/963—Opener, e.g. tear strip
    • 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
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/12—Surface bonding means and/or assembly means with cutting, punching, piercing, severing or tearing
    • Y10T156/1317—Means feeding plural workpieces to be joined
    • Y10T156/1322—Severing before bonding or assembling of parts
    • Y10T156/133—Delivering cut part to indefinite or running length web

Definitions

  • the invention relates to a device for separating tear strips from a tape with a width equal to the length of the tear strip and for application to a conveyed packaging material web, with a movable and a fixed straight knife for progressively separating the tear strip, a device which can be subjected to suction air for transferring the detached tear strip with its longitudinal direction in the direction of transport of the packaging material web to a suction roll partially wrapped by the continuously conveyed packaging material and rotating at the speed of the packaging material, and a welding device for welding the tear strip to the packaging material web.
  • the tear strip cannot be taken over safely, rather there is a risk that the detached tear strip remains in the guide shoe and then the The entire device is blocked because the next tear strips that have been cut off cannot be held by the guide shoe, since the suction air openings are covered by the remaining tear strips.
  • DE-A-1 586 120 in which the tear strips are applied transversely to the conveying direction of the packaging material. The latter is done with a multi-knife roller and suction air support. The tear strips are self-adhesive and can therefore simply be pressed onto the packaging material web without having to be transported and held separately.
  • the object of the invention is to provide a device of the type mentioned at the outset which, as the cut progresses, enables the separated tear strips to be transported safely to the packaging material web on which they are to be applied, even at a very high cycle speed.
  • the device for transferring comprises a suction wheel which conveys the tear strip progressively taken from one end to the suction roll, the suction wheel practically standing still in the takeover point of the tear strip and up to the transfer point the suction roll can be accelerated essentially to its speed.
  • the tear strip is periodically pulled forward and separated from a bobbin, the axis of which is arranged parallel to the packaging material web.
  • suction holes which are located in the knife holder of the movable knife in particular, the tear strip is transferred to a suction wheel that rotates intermittently and stops briefly during the transfer.
  • the suction wheel transfers the tear strip to a suction roller, which rotates continuously and has packaging material speed. At the moment of handover, there is synchronism between the two rollers.
  • the ribbon is clamped between the suction roller and the packaging material and welded to the packaging material as it passes through a heating device.
  • the device shown comprises a knife assembly 1 with a fixed knife 2, which has a straight cutting edge 3 and a support and guide surface 4 for a band 5, which is intermittent by a (not shown) bobbin with a feed stroke corresponding to the width of one of the Band 5 is fed transversely to its direction of tear strip 6 to be separated.
  • the knife arrangement comprises an up and down movable knife 7, which is carried by a knife holder 8, which in turn is moved up and down by a (only schematically indicated) drive 9.
  • the movable knife 7 is arranged obliquely to the fixed knife 2 with an inclination of, for example, 1 °, so that its straight cutting edge 10 progressively moves along the cutting edge 3 of the fixed knife 1 during the downward stroke of the knife 7 and thereby progressively separates the tear strip 6 from the band 5 .
  • suction air openings 13 open at the bottom and are connected to a suction air source 15 via a common suction air duct 14. Also open at the bottom of the Knife holder 8 also suction air openings 16 which are connected to the suction air source 15 via a common suction air duct 17.
  • the tear strip 6 When the tear strip 6 is separated from the belt 5, the tear strip 6 is held in accordance with the progress of the separation by the suction air of the suction air openings 16 of the knife holder 8 and is conveyed into the guide groove 12 of the guide shoe 11 by its downward stroke. At the end of the downward stroke of the knife holder 8, the suction air supply to its suction air openings 16 is interrupted and the suction air openings 13 now acted on with suction air in the guide groove 12 lead to the detached tear strip 6 being held in the guide groove 12.
  • the guide shoe 11 does not extend over the entire width of the band 5, so that one end of the tear strip 6 adopted therefrom protrudes from the latter at its upper end and essentially tangentially into the peripheral region of a suction wheel 18 which is provided with suction air openings 19 on its circumference which can be connected to the suction air source 15 via bores 20 with the interposition of a suction air control 21.
  • the suction air control 21 can comprise a ring which is arranged in contact with the suction wheel 18 and has an annular groove 22 which is connected to a suction air line 23, the groove 22 extending over the area on which suction air is to be effective. There, the bores 20 are connected to the groove 22, which is open on the side facing the bores 20.
  • the suction wheel 18 has a (schematically indicated) cam drive 24 in such a way that the suction wheel 18 practically comes to a standstill when the tear strip 6 is taken over, when it is held by the guide shoe 11, through which the suction air openings 19 which are effective become the suction air openings 19 Guide shoe 11 takes over the protruding end of the tear strip 6 and removes it with appropriate acceleration.
  • a suction roller 25 is provided, which is continuously driven by a drive 26 (only indicated schematically).
  • a packaging material web 28 (usually transparent film) is guided around the suction roller 25 by means of two guide rollers 27.
  • the suction roll 25, the width of which essentially corresponds to the width of the packaging material web 28, takes over the tear strip 6 at its forward end at a transfer point X from the suction wheel 18, the width of which corresponds to the width of the tear strip 6 at the circumference.
  • the suction wheel 18 is accelerated to the speed of the suction roller 25, so that there is practically no relative speed between suction wheel 18 and suction roller 25 at the transfer point X.
  • the suction air supply to the suction air openings 19 of the suction wheel 18 is interrupted, whereas the suction air supply to corresponding suction air openings 29 of the suction roller 25 is taken up.
  • the suction roller 25 transports the tear strip 6 along its surface between the latter and the packaging material web 28 partially wrapping around the suction roller 25.
  • a heating shoe 30, which extends along the path of the tear strip 6 over a circumferential section of the suction roller 25, welds the tear strip 6 to the packaging material web 28
  • the suction air openings 29 of the suction roller 25 can, like the suction air openings 19 of the suction wheel 18, be acted upon by suction air from the suction air source 15, so that this is not shown in detail.
  • a guide shoe 31 is expediently provided for the tear strip 6 in front of the transfer point X, which surrounds the suction wheel 18 and ensures that the tear strip 6 cannot run.
  • the transfer point X is expediently less than 180 ° from the takeover point for the tear strip 6 from the guide shoe 11, so that the suction wheel 18 can be brought practically to a standstill on the path remaining between the transfer point X and 180 °, so that it then is again ready to take over a new tear strip 6 practically without relative movement.

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  • Auxiliary Devices For And Details Of Packaging Control (AREA)

Abstract

The invention relates to a device for separating tearing strips (6) from a tape (5) having a width equal to the length of the tearing strip (6), and for applying the same to a conveyed web (28) of packaging material, with a moving knife and a fixed straight knife (2, 7) for the progressive separation of the tearing strip (6), a device which can be subjected to the action of suction air for delivering the separated tearing strip (6), with its longitudinal direction in the transporting direction of the web (28) of the packaging material, to a suction roller (25) around which the continuously conveyed packaging material (5) is partly wound and which rotates at the speed of the packaging material, and a welding device (30) for welding the tearing strip (6) to the web (28) of packaging material. In order to permit operation at elevated cycle speeds, provision is made for the transfer device to comprise a suction wheel (18) which conveys the tearing strip (6), progressively taken over from one end, to the suction roller (25), the suction wheel (18) being virtually stationary in the taking-over position of the tearing strip (6) and being capable of acceleration, up to the point (X) of transfer to the suction roller (25), substantially to the speed of rotation of the latter. <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zum Abtrennen von Aufreißstrei­fen von einem Band mit einer Breite gleich der Länge des Aufreißstreifens und zum Aufbringen auf eine geförderte Verpackungsmaterialbahn, mit einem beweg­lichen und einem feststehenden geraden Messer zum fortschreitenden Abtrennen des Aufreißstreifens, einer saugluftbeaufschlagbaren Einrichtung zum Übergeben des abgetrennten Aufreißstreifens mit seiner Längsrichtung in Transportrich­tung der Verpackungsmaterialbahn an eine von dem kontinuierlich geförderten Verpackungsmaterial teilweise umschlungene, mit Verpackungsmaterialgeschwin­digkeit sich drehende Saugwalze und einer Schweißeinrichtung zum Verschweißen des Aufreißstreifens mit der Verpackungsmaterialbahn.The invention relates to a device for separating tear strips from a tape with a width equal to the length of the tear strip and for application to a conveyed packaging material web, with a movable and a fixed straight knife for progressively separating the tear strip, a device which can be subjected to suction air for transferring the detached tear strip with its longitudinal direction in the direction of transport of the packaging material web to a suction roll partially wrapped by the continuously conveyed packaging material and rotating at the speed of the packaging material, and a welding device for welding the tear strip to the packaging material web.

Aus der DE-B-1 167 731 ist es bekannt, ein feststehendes und ein beweg­liches Messer in einer Vorrichtung zum Abtrennen und Aufbringen von Aufreiß­streifen zu verwenden, die beide in einem geringen Winkel zueinander ange­stellt sind, um einen ziehenden Schnitt zu erzeugen, wobei das bewegliche Messer saugluftbeaufschlagbar ist und den durch Saugluft festgehaltenen, ab­getrennten Aufreißstreifen an einen saugluftbeaufschlagten Führungsschuh übergibt. Der hiervon aufgenommene Aufreißstreifen ragt aus dem Führungsschuh heraus, so daß er von einer sich kontinuierlich drehenden Trommel, um die auch eine mit dem Aufreißstreifen zu verschweißende Verpackungsmaterialbahn geführt ist, mittels Saugluft übernommen wird. Bei hohen Verpackungsgeschwindigkeiten und einer sich dementsprechend schnell drehenden Trommel kann der Aufreiß­streifen jedoch nicht sicher übernommen werden, vielmehr besteht die Gefahr, daß der abgetrennte Aufreißstreifen im Führungsschuh verbleibt und dann die ganze Vorrichtung blockiert, da die nächsten abgetrennten Aufreißstreifen nicht vom Führungsschuh gehalten werden können, da die Saugluftöffnungen durch den verbliebenen Aufreißstreifen abgedeckt sind.From DE-B-1 167 731 it is known to use a fixed and a movable knife in a device for separating and applying tear strips, both of which are set at a slight angle to one another to produce a pulling cut, the movable knife can be acted upon by suction air and transfers the tear strip held by suction air to a guide shoe acted upon by suction air. The tear strip received from this protrudes out of the guide shoe, so that it is taken over by means of suction air from a continuously rotating drum, around which a packaging material web to be welded to the tear strip is also guided. At high packaging speeds and a correspondingly rapidly rotating drum, however, the tear strip cannot be taken over safely, rather there is a risk that the detached tear strip remains in the guide shoe and then the The entire device is blocked because the next tear strips that have been cut off cannot be held by the guide shoe, since the suction air openings are covered by the remaining tear strips.

Aus der DE-B-1 249 067 ist ferner eine Vorrichtung zum Abtrennen eines Aufreißstreifens bekannt, bei der zwei kreisbogenförmige gebogene Messer ver­wendet werden, so daß sich ein "schlagender" Schnitt mit seinen Nachteilen ge­genüber einem "fortschreitend" erfolgenden Schnitt ergibt. Hierbei wird der von einer entsprechend zu wölbenden Aufreißstreifenbahn abgetrennter Aufreiß­streifen direkt an eine teilweise von einer Verpackungsmaterialbahn umschlun­gene Saugwalze übergeben.From DE-B-1 249 067 a device for severing a tear strip is also known, in which two circular arc-shaped knives are used, so that there is a "striking" cut with its disadvantages compared to a "progressive" cut. In this case, the tear strip, which is separated from a tear strip web to be arched accordingly, is transferred directly to a suction roller partially wrapped around by a packaging material web.

Zusätzlich ist aus der DE-A-1 586 120 eine Vorrichtung bekannt, bei der die Aufreißstreifen quer zur Förderrichtung des Verpackungsmaterials aufge­bracht werden. Letzteres geschieht mit einer Vielmesserwalze und Saugluftun­terstützung. Die Aufreißstreifen sind hierbei selbstklebend und können daher einfach auf die Verpackungsmaterialbahn aufgedrückt werden, ohne daß sie ge­sondert weitertransportiert und dabei gehalten werden müssen.In addition, a device is known from DE-A-1 586 120 in which the tear strips are applied transversely to the conveying direction of the packaging material. The latter is done with a multi-knife roller and suction air support. The tear strips are self-adhesive and can therefore simply be pressed onto the packaging material web without having to be transported and held separately.

Schließlich ist aus der DE-A-3 423 295 bekannt, eine Messeranordnung vorzusehen, die schräg im Raum und zum Transportweg der Verpackungsmaterial­bahn angeordnet ist, so daß das bewegliche Messer, das einen abgetrennten Aufreißstreifen über Saugluft hält, aus der Schneidposition weiter in eine Position über der Verpackungsmaterialbahn schwenkbar ist, um den abgetrennten Aufreißstreifen hierauf abzulegen. Beim Weitertransport wird der Aufreiß­streifen auf die Verpackungsmaterialbahn aufgeschweißt. Der hierbei notwendige relativ große Hub des beweglichen Messers begrenzt die Taktzeiten, zumal au­ßerdem relativ große Massen zu bewegen sind. Abgesehen davon ist die Justie­rung aufwendig und der Aufreißstreifen nach dem Ablegen auf der Verpackungs­materialbahn nicht geführt, so daß er verlaufen kann. Die Verpackungsma­terialbahn ist hierbei intermittierend zu fördern, da der Aufreißstreifen nicht auf eine sich bewegende Verpackungsmaterialbahn abgelegt werden kann.Finally, it is known from DE-A-3 423 295 to provide a knife arrangement which is arranged obliquely in the space and to the transport path of the packaging material web, so that the movable knife, which holds a detached tear strip via suction air, continues into a position from the cutting position can be swiveled over the packaging material web in order to place the detached tear strip thereon. During further transport, the tear strip is welded onto the packaging material web. The necessary relatively large stroke of the movable knife limits the cycle times, especially since relatively large masses are also to be moved. Apart from this, the adjustment is complex and the tear strip is not guided after being placed on the packaging material web, so that it can run. The packaging material web is to be conveyed intermittently since the tear strip cannot be placed on a moving packaging material web.

Aufgabe der Erfindung ist es, eine Vorrichtung der eingangs genannten Art zu schaffen, die bei fortschreitendem Schnitt einen sicheren Transport der abgetrennten Aufreißstreifen zur Verpackungsmaterialbahn, auf der sie aufge­bracht werden sollen, auch bei sehr hoher Taktgeschwindigkeit ermöglicht.The object of the invention is to provide a device of the type mentioned at the outset which, as the cut progresses, enables the separated tear strips to be transported safely to the packaging material web on which they are to be applied, even at a very high cycle speed.

Diese Aufgabe wird dadurch gelöst, daß die Einrichtung zum Übergeben ein Saugrad umfaßt, das den von einem Ende her fortschreitend übernommenen Auf­reißstreifen zu der Saugwalze befördert, wobei das Saugrad in der Übernahme­stelle des Aufreißstreifens praktisch stillsteht und bis zur Übergabestelle an die Saugwalze im wesentlichen auf dessen Drehzahl beschleunigbar ist.This object is achieved in that the device for transferring comprises a suction wheel which conveys the tear strip progressively taken from one end to the suction roll, the suction wheel practically standing still in the takeover point of the tear strip and up to the transfer point the suction roll can be accelerated essentially to its speed.

Der Aufreißstreifen wird hierbei periodisch von einer Bobine, deren Achse parallel zur Verpackungsmaterialbahn angeordnet ist, vorgezogen und ab­getrennt. Mit Hilfe von Sauglöchern, die sich insbesondere im Messerhalter des beweglichen Messers befinden, wird der Aufreißstreifen einem Saugrad, das in­termittierend dreht und während der Übernahme kurz stillsteht, übergeben. Das Saugrad übergibt den Aufreißstreifen an eine Saugwalze, die kontinuierlich dreht und Verpackungsmaterialgeschwindigkeit hat. Im Moment der Übergabe herrscht zwischen den beiden Walzen Gleichlauf. Beim Weitertransport wird das Bändchen zwischen Saugwalze und Verpackungsmaterial eingeklemmt und beim Pas­sieren einer Heizeinrichtung mit dem Verpackungsmaterial verschweißt.The tear strip is periodically pulled forward and separated from a bobbin, the axis of which is arranged parallel to the packaging material web. With the help of suction holes, which are located in the knife holder of the movable knife in particular, the tear strip is transferred to a suction wheel that rotates intermittently and stops briefly during the transfer. The suction wheel transfers the tear strip to a suction roller, which rotates continuously and has packaging material speed. At the moment of handover, there is synchronism between the two rollers. During further transport, the ribbon is clamped between the suction roller and the packaging material and welded to the packaging material as it passes through a heating device.

Weitere Ausgestaltungen der Erfindung sind der nachfolgenden Beschrei­bung und den Unteransprüchen zu entnehmen.Further embodiments of the invention can be found in the following description and the subclaims.

Die Erfindung wird nachstehend anhand des in den beigefügten Abbildungen dargestellten Ausführungsbeispiels näher erläutert.

  • Fig. 1 zeigt schematisiert eine Ansicht einer Vorrichtung zum Abtrennen von Aufreißstreifen und Aufbringen auf eine Verpackungsmaterialbahn.
  • Fig. 2 zeigt detaillierter eine Ansicht in Richtung des Pfeils A von Fig. 1.
The invention is explained below with reference to the embodiment shown in the accompanying figures.
  • 1 shows a schematic view of a device for severing tear strips and applying them to a web of packaging material.
  • FIG. 2 shows a view in the direction of arrow A of FIG. 1 in more detail.

Die dargestellte Vorrichtung umfaßt eine Messeranordnung 1 mit einem feststehenden Messer 2, das eine gerade Schneidkante 3 aufweist und eine Auf­lage- und Führungsfläche 4 für ein Band 5 besitzt, das von einer (nicht dar­gestellten) Bobine intermittierend mit einem Vorschubhub entsprechend der Breite eines von dem Band 5 quer zu dessen Vorschubrichtung abzutrennenden Aufreißstreifens 6 zugeführt wird. Ferner umfaßt die Messeranordnung ein auf- und abbewegliches Messer 7, das von einem Messerhalter 8 getragen wird, der seinerseits von einem (nur schematisch angedeuteten) Antrieb 9 auf- und abbe­wegt wird. Das bewegliche Messer 7 ist schräg zum feststehenden Messer 2 mit einer Neigung von beispielsweise 1° angeordnet, so daß seine gerade Schneid­kante 10 beim Abwärtshub des Messers 7 fortscheitend an der Schneidkante 3 des feststehenden Messer 1 entlangfährt und hierbei den Aufreißstreifen 6 fort­schreitend vom Band 5 abtrennt.The device shown comprises a knife assembly 1 with a fixed knife 2, which has a straight cutting edge 3 and a support and guide surface 4 for a band 5, which is intermittent by a (not shown) bobbin with a feed stroke corresponding to the width of one of the Band 5 is fed transversely to its direction of tear strip 6 to be separated. Furthermore, the knife arrangement comprises an up and down movable knife 7, which is carried by a knife holder 8, which in turn is moved up and down by a (only schematically indicated) drive 9. The movable knife 7 is arranged obliquely to the fixed knife 2 with an inclination of, for example, 1 °, so that its straight cutting edge 10 progressively moves along the cutting edge 3 of the fixed knife 1 during the downward stroke of the knife 7 and thereby progressively separates the tear strip 6 from the band 5 .

Unterhalb der Führungsfläche 4 des Messers 2 befindet sich ein statio­närer Führungsschuh 11 mit einer Führungsnut 12, die parallel zur Schneidkante 10 des beweglichen Messers 7 verläuft. In der Führungsnut 12 münden bodensei­tig Saugluftöffnungen 13, die über einen gemeinsamen Saugluftkanal 14 an eine Saugluftquelle 15 angeschlossen sind. Außerdem münden an der Unterseite des Messerhalters 8 ebenfalls Saugluftöffnungen 16, die über einen gemeinsamen Saugluftkanal 17 an die Saugluftquelle 15 angeschlossen sind.Below the guide surface 4 of the knife 2 there is a stationary guide shoe 11 with a guide groove 12 which runs parallel to the cutting edge 10 of the movable knife 7. In the guide groove 12, suction air openings 13 open at the bottom and are connected to a suction air source 15 via a common suction air duct 14. Also open at the bottom of the Knife holder 8 also suction air openings 16 which are connected to the suction air source 15 via a common suction air duct 17.

Bei Abtrennen des Aufreißstreifens 6 vom Band 5 wird der Aufreißstreifen 6 entsprechend dem Fortschritt des Abtrennens durch die Saugluft der Saug­luftöffnungen 16 des Messerhalters 8 gehalten und durch dessen Abwärtshub in die Führungsnut 12 des Führungsschuhs 11 befördert. Am Ende des Abwärtshubs des Messerhalters 8 wird die Saugluftzufuhr zu dessen Saugluftöffnungen 16 unterbrochen und die nunmehr mit Saugluft beaufschlagten Saugluftöffnungen 13 in der Führungsnut 12 führen dazu, daß der abgetrennte Aufreißstreifen 6 in der Führungsnut 12 gehalten wird.When the tear strip 6 is separated from the belt 5, the tear strip 6 is held in accordance with the progress of the separation by the suction air of the suction air openings 16 of the knife holder 8 and is conveyed into the guide groove 12 of the guide shoe 11 by its downward stroke. At the end of the downward stroke of the knife holder 8, the suction air supply to its suction air openings 16 is interrupted and the suction air openings 13 now acted on with suction air in the guide groove 12 lead to the detached tear strip 6 being held in the guide groove 12.

Der Führungsschuh 11 erstreckt sich nicht über die gesamte Breite des Bandes 5, so daß ein Ende des hiervon übernommenen Aufreißstreifens 6 aus diesem an dessen oberen Ende heraus und im wesentlichen tangential in den Um­fangsbereich eines Saugrades 18 ragt, das auf seinem Umfang mit Saugluftöff­nungen 19 versehen ist, die über Bohrungen 20 unter Zwischenschaltung einer Saugluftsteuerung 21 mit der Saugluftquelle 15 verbindbar sind.The guide shoe 11 does not extend over the entire width of the band 5, so that one end of the tear strip 6 adopted therefrom protrudes from the latter at its upper end and essentially tangentially into the peripheral region of a suction wheel 18 which is provided with suction air openings 19 on its circumference which can be connected to the suction air source 15 via bores 20 with the interposition of a suction air control 21.

Die Saugluftsteuerung 21 kann einen in Anlage an das Saugrad 18 ange­ordneten Ring mit einer kreisringförmigen Nut 22, die mit einer Saugluftlei­tung 23 verbunden ist, umfassen, wobei sich die Nut 22 über den Bereich er­streckt, auf dem eine Saugluftbeaufschlagung wirksam werden soll. Dort stehen dann die Bohrungen 20 mit der Nut 22, die an der den Bohrungen 20 zugewandten Seite offen ist, in Verbindung.The suction air control 21 can comprise a ring which is arranged in contact with the suction wheel 18 and has an annular groove 22 which is connected to a suction air line 23, the groove 22 extending over the area on which suction air is to be effective. There, the bores 20 are connected to the groove 22, which is open on the side facing the bores 20.

Das Saugrad 18 besitzt einen (schematisch angedeuteten) Kurventrieb 24 derart, daß das Saugrad 18 im Übernahmezeitpunkt des Aufreißstreifens 6, wenn dieser von dem Führungsschuh 11 gehalten wird, praktisch zum Stillstand kommt, durch die dann an den Saugluftöffnungen 19 wirksam werdende Saugluftbeauf­schlagung das aus dem Führungsschuh 11 herausragende Ende des Aufreißstreifens 6 übernimmt und unter entsprechender Beschleunigung abführt.The suction wheel 18 has a (schematically indicated) cam drive 24 in such a way that the suction wheel 18 practically comes to a standstill when the tear strip 6 is taken over, when it is held by the guide shoe 11, through which the suction air openings 19 which are effective become the suction air openings 19 Guide shoe 11 takes over the protruding end of the tear strip 6 and removes it with appropriate acceleration.

Ferner ist eine Saugwalze 25 vorgesehen, die von einem (nur schematisch angedeuteten) Antrieb 26 kontinuierlich angetrieben wird. Mittels zweier Füh­rungsrollen 27 wird eine Verpackungsmaterialbahn 28 (üblicherweise Klarsicht­folie) um die Saugwalze 25 geführt.Furthermore, a suction roller 25 is provided, which is continuously driven by a drive 26 (only indicated schematically). A packaging material web 28 (usually transparent film) is guided around the suction roller 25 by means of two guide rollers 27.

Die Saugwalze 25, deren Breite im wesentlichen der Breite der Verpak­kungsmaterialbahn 28 entspricht, übernimmt an einer Übergabestelle X den Auf­reißstreifen 6 an dessen vorderem Ende von dem Saugrad 18, dessen Breite am Umfang der Breite des Aufreißstreifens 6 entspricht. Bis zur Übergabestelle X wird das Saugrad 18 auf die Geschwindigkeit der Saugwalze 25 beschleunigt, so daß an der Übergabestelle X praktisch keine Relativgeschwindigkeit zwischen Saugrad 18 und Saugwalze 25 besteht. An der Übergabestelle X wird die Saug­luftzufuhr zu den Saugluftöffnungen 19 des Saugrades 18 unterbrochen, dagegen die Saugluftzufuhr zu entsprechenden Saugluftöffnungen 29 der Saugwalze 25 aufgenommen. Hierdurch transportiert die Saugwalze 25 den Aufreißstreifen 6 längs seiner Oberfläche zwischen diese und die die Saugwalze 25 teilweise um­schlingende Verpackungsmaterialbahn 28. Ein Heizschuh 30, der sich entlang des Weges des Aufreißstreifens 6 über einen Umfangsabschnitt der Saugwalze 25 er­streckt, verschweißt den Aufreißstreifen 6 mit der Verpackungsmaterialbahn 28.The suction roll 25, the width of which essentially corresponds to the width of the packaging material web 28, takes over the tear strip 6 at its forward end at a transfer point X from the suction wheel 18, the width of which corresponds to the width of the tear strip 6 at the circumference. Up to the transfer point X, the suction wheel 18 is accelerated to the speed of the suction roller 25, so that there is practically no relative speed between suction wheel 18 and suction roller 25 at the transfer point X. At the transfer point X, the suction air supply to the suction air openings 19 of the suction wheel 18 is interrupted, whereas the suction air supply to corresponding suction air openings 29 of the suction roller 25 is taken up. As a result, the suction roller 25 transports the tear strip 6 along its surface between the latter and the packaging material web 28 partially wrapping around the suction roller 25. A heating shoe 30, which extends along the path of the tear strip 6 over a circumferential section of the suction roller 25, welds the tear strip 6 to the packaging material web 28

Die Saugluftöffnungen 29 der Saugwalze 25 können wie die Saugluftöff­nungen 19 des Saugrades 18 mit Saugluft von der Saugluftquelle 15 beaufschlagt werden, so daß dies nicht im einzelnen dargestellt ist.The suction air openings 29 of the suction roller 25 can, like the suction air openings 19 of the suction wheel 18, be acted upon by suction air from the suction air source 15, so that this is not shown in detail.

Zweckmäßigerweise ist ein Führungsschuh 31 für den Aufreißstreifen 6 vor der Übergabestelle X, der das Saugrad 18 umfänglich umgreift und dafür sorgt, daß der Aufreißstreifen 6 nicht verlaufen kann, vorgesehen.A guide shoe 31 is expediently provided for the tear strip 6 in front of the transfer point X, which surrounds the suction wheel 18 and ensures that the tear strip 6 cannot run.

Die Übergabestelle X befindet sich zweckmäßigerweise weniger als 180° von der Übernahmestelle für den Aufreißstreifen 6 vom Führungsschuh 11 ent­fernt, so daß das Saugrad 18 auf dem zwischen der Übergabestelle X und 180° verbleibenden Weg wieder praktisch zum Stillstand gebracht werden kann, so daß es dann wieder bereit ist, einen neuen Aufreißstreifen 6 praktisch ohne Rela­tivbewegung hierzu zu übernehmen.The transfer point X is expediently less than 180 ° from the takeover point for the tear strip 6 from the guide shoe 11, so that the suction wheel 18 can be brought practically to a standstill on the path remaining between the transfer point X and 180 °, so that it then is again ready to take over a new tear strip 6 practically without relative movement.

Die Saugluftöffnungen 16 können sich auch an dem beweglichen Messer 7 befinden, jedoch ist es zweckmäßiger, ein dünnes und damit relativ leichtes Messer 7 aus Stahl zu verwenden und die Saugluftöffnungen 16 in einem z.B. aus Aluminium bestehenden Messerträger 8 anzuordnen, in dem wesentlich einfacher Bohrungen anzubringen sind. Außerdem werden hierdurch die zu bewegenden Massen kleiner.The suction air openings 16 can also be located on the movable knife 7, but it is more expedient to use a thin and therefore relatively light knife 7 made of steel and the suction air openings 16 in a e.g. aluminum knife carrier 8 to be arranged, in which much easier holes are to be made. This also reduces the masses to be moved.

Claims (7)

1. Vorrichtung zum Abtrennen von Aufreißstreifen (6) von einem Band (5) mit einer Breite gleich der Länge des Aufreißstreifens (6) und zum Aufbringen auf eine geförderte Verpackungsmaterialbahn (28), mit einem beweglichen und einem feststehenden geraden Messer (2, 7) zum fortschreitenden Abtrennen des Aufreißstreifens (6), einer saugluftbeaufschlagbaren Einrichtung zum Übergeben des abgetrennten Aufreißstreifens (6) mit seiner Längsrichtung in Transport­richtung der Verpackungsmaterialbahn (28) an eine von dem kontinuierlich ge­förderten Verpackungsmaterial (5) teilweise umschlungene, mit Verpackungsmate­rialgeschwindigkeit sich drehende Saugwalze (25) und einer Schweißeinrich­tung (30) zum Verschweißen des Aufreißstreifens (6) mit der Verpackungsmate­rialbahn (28), dadurch gekennzeichnet , daß die Einrichtung zum Über­geben ein Saugrad (18) umfaßt, das den von einem Ende her fortschreitend übernommenen Aufreißstreifen (6) zu der Saugwalze (25) befördert, wobei das Saugrad (18) in der Übernahmestelle des Aufreißstreifens (6) praktisch still­steht und bis zur Übergabestelle (X) an die Saugwalze (25) im wesentlichen auf dessen Drehzahl beschleunigbar ist.1. Device for separating tear strips (6) from a tape (5) with a width equal to the length of the tear strip (6) and for application to a conveyed packaging material web (28), with a movable and a fixed straight knife (2, 7 ) for the progressive detachment of the tear strip (6), a device which can be subjected to suction air for transferring the detached tear strip (6) with its longitudinal direction in the transport direction of the packaging material web (28) to a suction roll partially wrapped by the continuously conveyed packaging material (5) and rotating at the speed of the packaging material ( 25) and a welding device (30) for welding the tear strip (6) to the packaging material web (28), characterized in that the device for transferring comprises a suction wheel (18) which adopts the tear strip (6) progressively taken over from one end the suction roller (25) conveyed, the suction wheel (18) in the takeover point of the tear strip (6) practically stands still and can be accelerated to its speed essentially up to the transfer point (X) to the suction roll (25). 2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Über­nahme- von der Übergabestelle (X) weniger als 180° entfernt ist.2. Device according to claim 1, characterized in that the take-over from the transfer point (X) is less than 180 °. 3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß ein stationärer, saugluftbeaufschlagbarer Führungsschuh (11) vorgesehen ist, durch den der Aufreißstreifen (6) an der Übernahmestelle im wesentlichen tangential zum Umfang des Saugrades (18) angeordnet wird.3. Apparatus according to claim 1 or 2, characterized in that a stationary, suction air-guiding shoe (11) is provided, through which the tear strip (6) at the takeover point is arranged substantially tangentially to the circumference of the suction wheel (18). 4. Vorrichtung nach Anspruch 3, dadurch gekennzeichnet, daß der Füh­rungsschuh (11) parallel zur Neigung des beweglichen Messers (7) zum festste­henden Messer (2) angeordnet ist.4. The device according to claim 3, characterized in that the guide shoe (11) is arranged parallel to the inclination of the movable knife (7) to the fixed knife (2). 5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das bewegliche Messer (7) von einem saugluftbeaufschlagbaren Messerhalter (8) gehalten ist.5. Device according to one of claims 1 to 4, characterized in that the movable knife (7) is held by a knife holder (8) which can be subjected to suction air. 6. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Schweißeinrichtung als kreisbogenförmiger Heizschuh (30) ausgebildet ist, der in dem von der Verpackungsmaterialbahn (28) umschlungenen Bereich die Saugwalze (25) umgibt.6. Device according to one of claims 1 to 5, characterized in that the welding device is designed as an arcuate heating shoe (30) which surrounds the suction roller (25) in the area wrapped by the packaging material web (28). 7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß vor der Übergabestelle (X) das Saugrad (18) von einem Führungsschuh (31) umfaßt ist.7. Device according to one of claims 1 to 6, characterized in that before the transfer point (X), the suction wheel (18) is surrounded by a guide shoe (31).
EP90108405A 1989-05-10 1990-05-04 Device for separating a tearing strip from a tape and for applying the same to a web of packaging material Expired - Lifetime EP0397039B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3915285 1989-05-10
DE3915285A DE3915285A1 (en) 1989-05-10 1989-05-10 DEVICE FOR SEPARATING TAKE-OFF STRIPS AND APPLYING ON A PACKING MATERIAL RAIL

Publications (2)

Publication Number Publication Date
EP0397039A1 true EP0397039A1 (en) 1990-11-14
EP0397039B1 EP0397039B1 (en) 1993-07-14

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EP90108405A Expired - Lifetime EP0397039B1 (en) 1989-05-10 1990-05-04 Device for separating a tearing strip from a tape and for applying the same to a web of packaging material

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US (1) US5041073A (en)
EP (1) EP0397039B1 (en)
CN (1) CN1031048C (en)
DE (1) DE3915285A1 (en)
SU (1) SU1760979A3 (en)

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WO1994001329A1 (en) * 1992-07-06 1994-01-20 Tetra Laval Holdings & Finance Sa Machine for the application of opening tapes
EP0681978A3 (en) * 1994-05-12 1996-08-07 Gd Spa Method and unit for producing tear strips.

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US6059710A (en) * 1998-12-24 2000-05-09 Kimberly-Clark Worldwide, Inc. Process for cutting of discrete components of a multi-component workpiece and depositing them with registration on a moving web of material
US6074333A (en) * 1998-12-24 2000-06-13 Kimberly-Clark Worldwide, Inc. Machine for cutting discrete components of a multi-component workpiece and depositing them with registration on a moving web of material
US6339912B1 (en) 2000-01-28 2002-01-22 Schreiber Foods, Inc. Easy open package for food items such as loaves of processed cheese
US6524423B1 (en) * 2000-03-07 2003-02-25 Kimberly-Clark Worldwide, Inc. Method of transferring a discrete portion of a first web onto a second web
US6550517B1 (en) * 2000-03-07 2003-04-22 Kimberly-Clark Worldwide, Inc. Apparatus for transferring a discrete portion of a first web onto a second web
US6722413B1 (en) * 2000-10-26 2004-04-20 Sig Pack Doboy Inc. Cutting and laminating apparatus for producing reinforced web
DE10215648A1 (en) * 2002-04-09 2003-11-06 Schmermund Verpackungstechnik Method for applying tear thread to strip of packing material comprises drawing off self-adhesive thread from reel using roller which guides it so that it is laid across strip, when cutter severs it
US20050202191A1 (en) * 2004-03-10 2005-09-15 Nowak Michael R. Ream wrap packaging with tear tapes
US7849904B2 (en) * 2004-03-10 2010-12-14 Coating Excellence International, Inc. Tear tape applicator for ream wrap and other packaging materials
CN1326749C (en) * 2004-11-08 2007-07-18 云南昆船设计研究院 Automatic dismantling and recovering method and device for case packaging belt
PL1803647T3 (en) * 2005-12-29 2009-04-30 Tetra Laval Holdings & Finance Apparatus for feeding opening devices to be glued on packages containing pourable food products
CN105459446B (en) * 2015-12-23 2018-04-24 汕头市远东轻化装备有限公司 A kind of heat-sealing device
CN106976615B (en) * 2017-04-27 2018-11-16 重庆新派新智能科技有限公司 The device of keyboard case fitting nameplate
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Also Published As

Publication number Publication date
DE3915285A1 (en) 1990-11-15
CN1047249A (en) 1990-11-28
EP0397039B1 (en) 1993-07-14
CN1031048C (en) 1996-02-21
US5041073A (en) 1991-08-20
SU1760979A3 (en) 1992-09-07

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