EP0040170B1 - Method and apparatus for fixing a tag to a plastic bag - Google Patents

Method and apparatus for fixing a tag to a plastic bag Download PDF

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Publication number
EP0040170B1
EP0040170B1 EP81810148A EP81810148A EP0040170B1 EP 0040170 B1 EP0040170 B1 EP 0040170B1 EP 81810148 A EP81810148 A EP 81810148A EP 81810148 A EP81810148 A EP 81810148A EP 0040170 B1 EP0040170 B1 EP 0040170B1
Authority
EP
European Patent Office
Prior art keywords
conveyor
sealing
lamina
bags
process according
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
Application number
EP81810148A
Other languages
German (de)
French (fr)
Other versions
EP0040170A2 (en
EP0040170A3 (en
Inventor
Heinz Kühni
Peter Schwaninger
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.)
Ivers Lee AG
Original Assignee
Ivers Lee AG
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 Ivers Lee AG filed Critical Ivers Lee AG
Publication of EP0040170A2 publication Critical patent/EP0040170A2/en
Publication of EP0040170A3 publication Critical patent/EP0040170A3/en
Application granted granted Critical
Publication of EP0040170B1 publication Critical patent/EP0040170B1/en
Expired 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
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • 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
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/813—Applying closures
    • 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
    • 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
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear 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
    • 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
    • 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
    • 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
    • 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
    • Y10T156/1339—Delivering cut part in sequence to serially conveyed articles
    • 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
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1744—Means bringing discrete articles into assembled relationship
    • 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
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1744—Means bringing discrete articles into assembled relationship
    • Y10T156/1768—Means simultaneously conveying plural articles from a single source and serially presenting them to an assembly station
    • Y10T156/1771—Turret or rotary drum-type conveyor
    • 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
    • Y10T156/17—Surface bonding means and/or assemblymeans with work feeding or handling means
    • Y10T156/1702—For plural parts or plural areas of single part
    • Y10T156/1744—Means bringing discrete articles into assembled relationship
    • Y10T156/1768—Means simultaneously conveying plural articles from a single source and serially presenting them to an assembly station
    • Y10T156/1771—Turret or rotary drum-type conveyor
    • Y10T156/1773—For flexible sheets

Definitions

  • the present invention relates to a method for applying a closure element to a plastic bag and a device for carrying out the method.
  • Plants for the automatic filling of plastic bags with contents are known.
  • a coherent strip consisting of individual plastic bags is fed from a supply roll to a folding device. After folding, the open bags are sealed on two sides and then filled with the individual filling material. After filling, the bags are separated from one another by a cutting device. The separated bags are then sealed on the top side.
  • the problem with these plastic bags is that they can be closed again in a simple manner after use, that is to say after being cut open.
  • a device for the production of reclosable bags is known from D-OS No. 2 543 592.
  • a closing tape provided with a stiffening insert is coated with adhesive by means of an application device and glued onto the bags fed with a drum.
  • This device cannot be easily installed in a bag filling system.
  • the application of the closure and the reclosing of the bag are relatively complicated.
  • U.S. Patent No. 3,812,572 there is known a device for attaching dispensing tubes to the side walls of bags. This device is suitable for installation in systems for filling the bags, but here a pipe device is not attached. From US Pat. No.
  • the device for equipping the plastic bags with the closure element should be able to be installed in the known filling systems.
  • known systems should be able to be separated at the desired location and the device for sealing platelets inserted onto the plastic bag.
  • Fig. 1 the sealing unit is shown schematically in front view and in Fig. 2 in side view.
  • the existing system 1 is separated and the sealing unit 2 with the substructure 3 is inserted.
  • the control device (not shown) for the sealing unit 2 is located in the substructure.
  • the control is pneumatic, with a camshaft controlling the individual pneumatic actuation elements being connected to the existing system.
  • the folded double plastic band 4, from which the bags are cut out at a later station, is fed to the sealing unit via feed rollers 5.
  • the sealing unit essentially comprises a punching device 6, a feeder device designed as a lever 7, a supply roll 8 with aluminum belt 9 and a transport device 10 for the aluminum belt 9 as well as a sealing device 11.
  • FIGS. 1 and 2 the pneumatic and electrical connections are only partially drawn.
  • the sealing unit 2 is mounted on a carrier 12.
  • the aluminum strip 9 is fed to the punching unit 6 from the supply roll 8 arranged at an angle of preferably 45 °, provided on a disc 13 and wound onto a reel 14.
  • a plate is punched out of the aluminum strip 9, which is passed on in a second step to the arm 15 of the lever 7 which is in the upper position.
  • the lever 7 is provided with two vacuum connections 16, 17 for sucking in the die-cut plate (not shown in FIGS. 1 and 2).
  • the pneumatic lever actuation device 18 With the pneumatic lever actuation device 18, the lever is rotated by 180 ° about the axis 19 after the transfer of a punched-out plate and brings the aluminum plate into that located in the sealing device 11 Plastic bag.
  • the other lever arm 20 is now in front of the punching device 6.
  • the lever 7 is provided with two heating devices 21 and 22 so that the platelets can be preheated before the sealing operation in order to keep the sealing operation as short as possible in the interest of a high production rate.
  • the connections 23, 24 for the heating devices 21, 22 of the lever 7 are connected to a heating control device 25.
  • the temperature is checked with a thermocouple (not shown) provided on one of the two heating devices 21, 22.
  • the thermocouple is connected to the control unit 25 via a cable 26.
  • a counter-pressure plate 28 Opposite the sealing device 11 there is a counter-pressure plate 28, which is also actuated by a pneumatic cylinder 27 and serves to ensure that the lever arm is not bent during the sealing process.
  • the pressure during the sealing process which lasts about 0.6 seconds, is about 10 6 Pa.
  • the waste belt remaining after the aluminum plates have been punched out is transported further by two transport rollers 29, 30. These transport rollers 29, 30 are also driven pneumatically by the transport device 10.
  • FIG. 3 shows a detailed side view of the punching and sealing device.
  • the carrier 12 for the punching and sealing device and a holder 31 for the pneumatic actuating device 27 of the counterpressure plate 28 are fastened to a chassis 32.
  • the pneumatic actuating cylinder 33 for the sealing plate 34 is fastened to a vertical holding plate 35 of the carrier 12.
  • a heating device 38 for heating the sealing plate 34 is installed in the sealing plate holder.
  • the sealing plate holder 37 is guided by guide rods 39.
  • the sealing plate holder 37 is arranged spring-loaded, so that an optimal, flat contact with the aluminum plate 40 or. can be done on lever 7.
  • the aluminum plate 40 When sealing, the aluminum plate 40 is located on the inner surface of the left side of the plastic bag 41 according to FIG. 3. During the sealing process, the counterpressure plate 28 consisting of a metal stamp 42 and a plastic layer 43 is moved to the left by the pneumatic actuating device 27 according to FIG.
  • Fig. 4 the punching and sealing device is shown in front view.
  • a deflection roller 44 for the aluminum strip 9 can also be seen from this figure.
  • FIGS. 6 and 6 show the drive 10 of the transport rollers 29 and 30.
  • the connecting rod 46 actuated by a pneumatic cylinder-piston unit 45 drives a gearwheel 47.
  • the gear 47 engages in a second gear 48 connected to the roller 29 in a rotationally fixed manner.
  • the rollers 29, 30 have gear wheels 49, 50 at their lower ends, the roller 29 driven by the unit 45 driving the roller 30 via the gear wheels 49, 50.
  • the rollers are held in a frame 51.
  • one roller has a metal surface and the other roller has a rubber surface. It has been shown that with such an arrangement the aluminum strip is fed more uniformly than with two rubber or two metal rollers. With a clamping screw 52, the rollers can be pressed together to the desired extent in order to ensure optimal feeding of the aluminum strip.
  • the pneumatically operated piston 53 is connected to a punching tool 54 and a transport plate 55.
  • a plate 40 is punched out of the aluminum strip 9 using the punch 54, the punch pressing against the die 56.
  • the die-cut plate 40 is transferred to the lever 7 with the aid of the transport plate 55.
  • An outer ring 57 which is concentric with the punching tool, presses on the aluminum strip 9 during punching, the punching tool 54 and the transport plate 55 being moved towards the lever 7 against the force of the springs 58.
  • Spring assemblies 60 are provided on guide rods 59 for damping during the punching process.
  • FIG. 8 shows the plastic bag 41 with the welded-on aluminum plate 40.
  • the long sides of the aluminum plate form an angle of 45 ° with the base of the plastic bag.
  • the plastic bag with the bottom 61 is cut along the dashed line 62.
  • the aluminum plate is bent over the dash-dotted line 63 by approximately 180 °.
  • the individual elements could also be actuated mechanically.
  • An advantage of the sealing device described is that it can be easily installed in existing systems. A production rate of around 40-45 pieces per minute can be achieved. When sealing, a code number or the expiry date can also be stamped on the metal plate. Attaching the aluminum plates to an inner wall of the bag has the advantage that an injury, in particular a fingernail, is excluded. With the aluminum plate described above sealed onto the plastic bag, a reliable possibility of closing the cut-open plastic bag can be achieved in a simple manner.

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  • Making Paper Articles (AREA)
  • Package Closures (AREA)
  • Closing Of Containers (AREA)

Description

Die vorliegende Erfindung betrifft ein Verfahren zum Aufbringen eines Verschlusselementes auf Kunststoffbeutel sowie eine Vorrichtung zur Durchführung des Verfahrens.The present invention relates to a method for applying a closure element to a plastic bag and a device for carrying out the method.

Es sind Anlagen zum automatischen Abfüllen von Plastikbeuteln mit Füllgut bekannt. Bei diesen Anlagen wird ein zusammenhängender, aus einzelnen Kunststoffbeuteln bestehender Streifen von einer Vorratsrolle einer Faltvorrichtung zugeführt. Nach der Faltung werden die noch offenen Beutel an zwei Seiten verschweisst und anschliessend mit dem individuellen Füllgut abgefüllt. Nach der Abfüllung werden die Beutel durch eine Schneidvorrichtung voneinander getrennt. Die voneinander getrennten Beutel werden anschliessend noch an der oberen Seite verschweisst. Bei diesen Kunststoffbeuteln besteht das Problem darin, sie nach Gebrauch, also nach dem Aufschneiden, auf einfache Art und Weise wieder verschliessen zu können.Plants for the automatic filling of plastic bags with contents are known. In these systems, a coherent strip consisting of individual plastic bags is fed from a supply roll to a folding device. After folding, the open bags are sealed on two sides and then filled with the individual filling material. After filling, the bags are separated from one another by a cutting device. The separated bags are then sealed on the top side. The problem with these plastic bags is that they can be closed again in a simple manner after use, that is to say after being cut open.

Aus der D-OS Nr. 2 543 592 ist eine Vorrichtung für die Herstellung von wiederverschliessbaren Tüten bekannt. Ein mit einer Versteifungseinlage versehenes Schliessband wird mittels einer Auftrageinrichtung mit Klebstoff beschichtet und auf die mit einer Trommel zugeführten Tüten aufgeklebt. Diese Vorrichtung kann nicht ohne weiteres in eine Anlage zum Abfüllen von Beuteln eingebaut werden. Im weiteren ist das Aufbringen des Verschlusses sowie das Wiederverschliessen des Beutels relativ kompliziert. Aus der US-Patentschrift Nr. 3 812 572 ist eine Vorrichtung zum Befestigen von Ausgaberohren an die Seitenwände von Beuteln bekannt. Diese Vorrichtung eignet sich zum Einbauen in Anlagen zum Abfüllen der Beuteln, jedoch wird hier keine Verschlussvorrichtung sondern ein Rohr angebracht. Aus der US-Patentschrift Nr. 3 794 545 ist eine Vorrichtung zum Aufbringen eines Abschnürbandes, zusammen mit einem von einem breiten Band abgeschnittenen und mit Klebstoff versehenen Bandstück, auf einen Beutel vorbekannt. Diese Vorrichtung eignet sich nicht ohne weiteres zum Einbau in eine Anlage zum Abfüllen von Beuteln. Im weiteren muss das Verschlussmittel aufgeklebt werden. Das Verschlussmittel selbst ist zweiteilig ausgebildet und erfordert das Zufügen eines Abschnürbandes und eines breiten Bandes. Gemäss der britischen Patentschrift Nr. 832 897 wird eine Vorrichtung zum Kleben eines Verschlussmittels zwischen zwei Beutelfolien beschrieben. Diese Vorrichtung eignet sich nur schwerlich für den Einbau in eine Anlage zum Abfüllen von Beuteln. Im weiteren muss das Verschlussmittel aufgeklebt werden.A device for the production of reclosable bags is known from D-OS No. 2 543 592. A closing tape provided with a stiffening insert is coated with adhesive by means of an application device and glued onto the bags fed with a drum. This device cannot be easily installed in a bag filling system. Furthermore, the application of the closure and the reclosing of the bag are relatively complicated. From U.S. Patent No. 3,812,572 there is known a device for attaching dispensing tubes to the side walls of bags. This device is suitable for installation in systems for filling the bags, but here a pipe device is not attached. From US Pat. No. 3,794,545 a device for applying a strapping tape, together with a piece of tape cut from a wide tape and provided with adhesive, is previously known on a bag. This device is not readily suitable for installation in a system for filling bags. Furthermore, the closure means must be glued on. The closure means itself is in two parts and requires the addition of a pinch tape and a wide tape. According to British Patent No. 832 897, a device for gluing a closure means between two pouch films is described. This device is hardly suitable for installation in a system for filling bags. Furthermore, the closure means must be glued on.

Es ist eine Aufgabe der vorliegenden Erfindung Kunststoffbeutel so auszustatten, dass sie nach der Öffnung leicht verschlossen werden können.It is an object of the present invention to provide plastic bags so that they can be easily closed after opening.

Gemäss einer weiteren Aufgabe soll die Vorrichtung zur Ausstattung der Kunststoffbeutel mit dem Verschlusselement in die bekannten Abfüllanlagen eingebaut werden können. Im speziellen sollen bekannte Anlagen an der gewünschten Stelle aufgetrennt und die Vorrichtung zum Aufsiegeln von Plättchen auf die Kunststoffbeutel eingefügt werden können.According to a further object, the device for equipping the plastic bags with the closure element should be able to be installed in the known filling systems. In particular, known systems should be able to be separated at the desired location and the device for sealing platelets inserted onto the plastic bag.

Dies wird erfindungsgemäss durch das Verfahren und die Vorrichtung der unabhängigen Ansprüche 1 und 6 erzielt.This is achieved according to the invention by the method and the device of independent claims 1 and 6.

Merkmale bevorzugter Ausführungsformen ergeben sich aus den abhängigen Ansprüchen.Features of preferred embodiments result from the dependent claims.

Im folgenden wird ein Ausführungsbeispiel der Erfindung anhand der beiliegenden Zeichnung näher beschrieben. Es zeigen:

  • Fig. eine schematische Vorderansicht der Aufsiegeleinheit,
  • Fig. 2 eine schematische Seitenansicht der Aufsiegeleinheit,
  • Fig. 3 eine Seitenansicht der Aufsiegeleinheit, teilweise geschnitten,
  • Fig. 4 eine weitere Vorderansicht der Aufsiegeleinheit in grösserem Massstab,
  • Fig. 5 einen Schnitt durch die Transportwalzen für das Aluminiumband,
  • Fig. 6 eine Draufsicht auf den Antrieb für die Transportwalzen,
  • Fig. 7 einen Schnitt durch die Standvorrichtung,
  • Fig. 8 eine schematische Ansicht des Kunststoffbeutels mit aufgesiegeltem Aluminiumplättchen.
In the following an embodiment of the invention will be described with reference to the accompanying drawings. Show it:
  • 1 shows a schematic front view of the sealing unit,
  • 2 shows a schematic side view of the sealing unit,
  • 3 shows a side view of the sealing unit, partly in section,
  • 4 shows a further front view of the sealing unit on a larger scale,
  • 5 shows a section through the transport rollers for the aluminum strip,
  • 6 is a plan view of the drive for the transport rollers,
  • 7 shows a section through the standing device,
  • Fig. 8 is a schematic view of the plastic bag with sealed aluminum plate.

In Fig. 1 ist die Aufsiegeleinheit schematisch in Vorderansicht und in Fig. 2 in Seitenansicht dargestellt. Die bereits vorhandene Anlage 1 wird aufgetrennt und die Siegeleinheit 2 mit dem Unterbau 3 eingefügt. Im Unterbau befindet sich die nichtdargestellte Steuervorrichtung für die Siegeleinheit 2. Die Steuerung erfolgt pneumatisch, wobei eine die einzelnen pneumatischen Betätigungselemente steuernde Nockenwelle mit der bestehenden Anlage verbunden wird. Das gefaltete doppelte Kunststoffband 4, aus welchem bei einer späteren Station die Beutel ausgeschnitten werden, wird über Vorschubwalzen 5 der Siegeleinheit zugeführt. Die Siegeleinheit umfasst im wesentlichen eine Stanzvorrichtung 6, eine als Hebel 7 ausgebildete Zubringervorrichtung, eine Vorratsrolle 8 mit Aluminiumband 9 und eine Transportvorrichtung 10 für das Aluminiumband 9 sowie eine Siegelvorrichtung 11. In den Fig. 1 und 2 sind die pneumatischen sowie die elektrischen Anschlüsse nur teilweise eingezeichnet. Die Siegeleinheit 2 ist auf einem Träger 12 montiert.In Fig. 1 the sealing unit is shown schematically in front view and in Fig. 2 in side view. The existing system 1 is separated and the sealing unit 2 with the substructure 3 is inserted. The control device (not shown) for the sealing unit 2 is located in the substructure. The control is pneumatic, with a camshaft controlling the individual pneumatic actuation elements being connected to the existing system. The folded double plastic band 4, from which the bags are cut out at a later station, is fed to the sealing unit via feed rollers 5. The sealing unit essentially comprises a punching device 6, a feeder device designed as a lever 7, a supply roll 8 with aluminum belt 9 and a transport device 10 for the aluminum belt 9 as well as a sealing device 11. In FIGS. 1 and 2 the pneumatic and electrical connections are only partially drawn. The sealing unit 2 is mounted on a carrier 12.

Von der schräg in einem Winkel von vorzugsweise 45° angeordneten, auf einer Scheibe 13 vorgesehenen und auf eine Haspel 14 aufgewikkelten Vorratsrolle 8 wird das Aluminiumband 9 der Stanzeinheit 6 zugeführt. In einem ersten Arbeitsgang wird aus dem Aluminiumband 9 ein Plättchen ausgestanzt, welches in einem zweiten Arbeitsgang an den in der oberen Stellung befindlichen Arm 15 des Hebels 7 weitergegeben wird. Der Hebel 7 ist mit zwei Vakuumanschlüssen 16, 17 zum Ansaugen des in den Fig. 1 und 2 nichtdargestellten ausgestanzten Plättchens versehen. Mit der pneumatischen Hebelbetätigungsvorrichtung 18 wird der Hebel nach Übergabe eines ausgestanzten Plättchens um 180° um die Achse 19 verdreht und bringt das Aluminiumplättchen in den sich bei der Siegelvorrichtung 11 befindlichen Kunststoffbeutel. Der andere Hebelarm 20 befindet sich nun vor der Stanzvorrichtung 6. Während dem Aufsiegelvorgang wird ein neues Plättchen ausgestanzt und auf den Hebelarm gebracht. Mit der geheizten Siegelvorrichtung 11 wird das Aluminiumplättchen auf die Innenseite des vorderen Kunststoffbandes 4 aufgeschweisst. Der Hebel 7 ist mit zwei Heizvorrichtungen 21 und 22 versehen, damit die Plättchen vor dem Aufsiegelgang vorgeheizt werden können, um den Aufsiegelvorgang im Interesse einer grossen Produktionsrate möglichst kurz zu halten. Die Anschlüsse 23, 24 für die Heizvorrichtungen 21, 22 des Hebels 7 sind mit einem Heizsteuergerät 25 verbunden. Mit einem an einer der beiden Heizvorrichtungen 21, 22 vorgesehenen, nichtdargestellten Thermoelement wird die Temperatur kontrolliert. Das Thermoelement ist über ein Kabel 26 mit dem Steuergerät 25 verbunden.The aluminum strip 9 is fed to the punching unit 6 from the supply roll 8 arranged at an angle of preferably 45 °, provided on a disc 13 and wound onto a reel 14. In a first step, a plate is punched out of the aluminum strip 9, which is passed on in a second step to the arm 15 of the lever 7 which is in the upper position. The lever 7 is provided with two vacuum connections 16, 17 for sucking in the die-cut plate (not shown in FIGS. 1 and 2). With the pneumatic lever actuation device 18, the lever is rotated by 180 ° about the axis 19 after the transfer of a punched-out plate and brings the aluminum plate into that located in the sealing device 11 Plastic bag. The other lever arm 20 is now in front of the punching device 6. During the sealing process, a new plate is punched out and placed on the lever arm. With the heated sealing device 11, the aluminum plate is welded onto the inside of the front plastic band 4. The lever 7 is provided with two heating devices 21 and 22 so that the platelets can be preheated before the sealing operation in order to keep the sealing operation as short as possible in the interest of a high production rate. The connections 23, 24 for the heating devices 21, 22 of the lever 7 are connected to a heating control device 25. The temperature is checked with a thermocouple (not shown) provided on one of the two heating devices 21, 22. The thermocouple is connected to the control unit 25 via a cable 26.

Gegenüber der Siegelvorrichtung 11 ist eine ebenfalls von einem pneumatischen Zylinder 27 betätigte Gegendruckplatte 28 vorgesehen, die dazu dient, dass der Hebelarm während des Aufsiegelns nicht verbogen wird. Der Druck beim etwa 0,6 Sekunden dauernden Aufsiegelvorgang beträgt etwa 106 Pa.Opposite the sealing device 11 there is a counter-pressure plate 28, which is also actuated by a pneumatic cylinder 27 and serves to ensure that the lever arm is not bent during the sealing process. The pressure during the sealing process, which lasts about 0.6 seconds, is about 10 6 Pa.

Das nach dem Ausstanzen der Aluminiumplättchen verbleibende Abfallband wird durch zwei Transportwalzen 29, 30 weitertransportiert. Der Antrieb dieser Transportwalzen 29, 30 erfolgt durch die Transportvorrichtung 10 ebenfalls pneumatisch.The waste belt remaining after the aluminum plates have been punched out is transported further by two transport rollers 29, 30. These transport rollers 29, 30 are also driven pneumatically by the transport device 10.

Aus Fig. 3 ist eine seitliche Ansicht der Stanz-und Aufsiegelvorrichtung im Detail ersichtlich. Der Träger 12 für die Stanz- und Siegelvorrichtung sowie eine Halterung 31 für die pneumatische Betätigungsvorrichtung 27 der Gegendruckplatte 28 werden an einem Chassis 32 befestigt. Der pneumatische Betätigungszylinder 33 für die Siegelplatte 34 ist an einer vertikalen Halteplatte 35 des Trägers 12 befestigt. Mit der Kolbenstange 36 wird ein Siegelplattenhalter 37 vor- und zurückverschoben. In den Siegelplattenhalter ist eine Heizvorrichtung 38 zum Erhitzen der Siegelplatte 34 eingebaut. Der Siegelplattenhalter 37 wird durch Führungsstäbe 39 geführt. Der Siegelplattenhalter 37 ist gefedert angeordnet, damit ein optimales, planes Anliegen am Aluminiumplättchen 40 resp. am Hebel 7 erfolgen kann.3 shows a detailed side view of the punching and sealing device. The carrier 12 for the punching and sealing device and a holder 31 for the pneumatic actuating device 27 of the counterpressure plate 28 are fastened to a chassis 32. The pneumatic actuating cylinder 33 for the sealing plate 34 is fastened to a vertical holding plate 35 of the carrier 12. With the piston rod 36, a sealing plate holder 37 is moved back and forth. A heating device 38 for heating the sealing plate 34 is installed in the sealing plate holder. The sealing plate holder 37 is guided by guide rods 39. The sealing plate holder 37 is arranged spring-loaded, so that an optimal, flat contact with the aluminum plate 40 or. can be done on lever 7.

Beim Aufsiegeln befindet sich das Aluminiumplättchen 40 an der Innenoberfläche der gemäss Fig. 3 linken Seite des Kunststoffbeutels 41. Beim Aufsiegelvorgang wird die aus einem Metallstempel 42 und einer Kunststoffschicht 43 bestehende Gegendruckplatte 28 gemäss Fig. 3 durch die pneumatische Betätigungsvorrichtung 27 nach links bewegt.When sealing, the aluminum plate 40 is located on the inner surface of the left side of the plastic bag 41 according to FIG. 3. During the sealing process, the counterpressure plate 28 consisting of a metal stamp 42 and a plastic layer 43 is moved to the left by the pneumatic actuating device 27 according to FIG.

In Fig. 4 ist die Stanz- und Siegelvorrichtung in Vorderansicht dargestellt. Zusätzlich zu den vorderen Figuren ist aus dieser Figur noch eine Umlenkrolle 44 für das Aluminiumband 9 ersichtlich.In Fig. 4 the punching and sealing device is shown in front view. In addition to the front figures, a deflection roller 44 for the aluminum strip 9 can also be seen from this figure.

Aus den Fig. und 6 ist der Antrieb 10 der Transportwalzen 29 und 30 ersichtlich. Die von einem pneumatischen Zylinder-Kolbenaggregat 45 betätigte Pleuelstange 46 treibt ein Zahnrad 47 an. Das Zahnrad 47 greift in ein zweites, mit der Walze 29 drehfest verbundenes Zahnrad 48 ein. Die Walzen 29, 30 weisen an ihren unteren Enden Zahnräder 49, 50 auf, wobei die vom Aggregat 45 angetriebene Walze 29 über die Zahnräder 49, 50 die Walze 30 antreibt. Die Walzen sind in einem Rahmen 51 gehalten. Vorzugsweise weist eine Walze eine Metall- und die andere Walze eine Gummioberfläche auf. Es hat sich gezeigt, dass mit einer solchen Anordnung ein gleichmässigerer Vorschub des Aluminiumbandes erfolgt, als mit zwei Gummi- oder zwei Metallwalzen. Mit einer Spannschraube 52 können die Walzen im gewünschten Mass aneinander gedrückt werden, um einen optimalen Vorschub des Aluminiumbandes zu gewährleisten.6 and 6 show the drive 10 of the transport rollers 29 and 30. The connecting rod 46 actuated by a pneumatic cylinder-piston unit 45 drives a gearwheel 47. The gear 47 engages in a second gear 48 connected to the roller 29 in a rotationally fixed manner. The rollers 29, 30 have gear wheels 49, 50 at their lower ends, the roller 29 driven by the unit 45 driving the roller 30 via the gear wheels 49, 50. The rollers are held in a frame 51. Preferably, one roller has a metal surface and the other roller has a rubber surface. It has been shown that with such an arrangement the aluminum strip is fed more uniformly than with two rubber or two metal rollers. With a clamping screw 52, the rollers can be pressed together to the desired extent in order to ensure optimal feeding of the aluminum strip.

In Fig. 7 ist die Stanzvorrichtung 6 dargestellt. Der pneumatisch betätigte Kolben 53 ist mit einem Stanzwerkzeug 54 und einer Transportplatte 55 verbunden. In einem ersten Arbeitsgang wird aus dem Aluminiumband 9 mit dem Stanzwerkzeug 54 ein Plättchen 40 ausgestanzt, wobei das Stanzwerkzeug gegen die Matrize 56 drückt. In einem zweiten Arbeitsgang wird das ausgestanzte Plättchen 40 mit Hilfe der Transportplatte 55 auf den Hebel 7 übertragen. Ein äusserer, zum Stanzwerkzeug konzentrischer Ring 57 drückt beim Ausstanzen auf das Aluminiumband 9, wobei das Stanzwerkzeug 54 und die Transportplatte 55 gegen die Kraft der Federn 58 in Richtung auf den Hebel 7 zu verschoben werden. An Führungsstangen 59 sind Federpakete 60 zur Dämpfung während des Stanzvorganges vorgesehen.7 shows the punching device 6. The pneumatically operated piston 53 is connected to a punching tool 54 and a transport plate 55. In a first operation, a plate 40 is punched out of the aluminum strip 9 using the punch 54, the punch pressing against the die 56. In a second operation, the die-cut plate 40 is transferred to the lever 7 with the aid of the transport plate 55. An outer ring 57, which is concentric with the punching tool, presses on the aluminum strip 9 during punching, the punching tool 54 and the transport plate 55 being moved towards the lever 7 against the force of the springs 58. Spring assemblies 60 are provided on guide rods 59 for damping during the punching process.

Aus Fig. 8 ist der Kunststoffbeutel 41 mit dem aufgeschweissten Aluminiumplättchen 40 ersichtlich. Die Längsseiten des Aluminiumplättchens schliessen mit der Grundfläche des Kunststoffbeutels einen Winkel von 45° ein. Der Kunststoffbeutel mit dem Boden 61 wird entlang der gestrichelten Linie 62 aufgeschnitten. Zum Verschliessen des Beutels wird das Aluminiumplättchen entlang der strichpunktierten Linie 63 um etwa 180° umgebogen.8 shows the plastic bag 41 with the welded-on aluminum plate 40. The long sides of the aluminum plate form an angle of 45 ° with the base of the plastic bag. The plastic bag with the bottom 61 is cut along the dashed line 62. To close the bag, the aluminum plate is bent over the dash-dotted line 63 by approximately 180 °.

In einer anderen Ausgestaltung der Erfindung könnte die Betätigung der einzelnen Elemente auch mechanisch erfolgen. Im weiteren wäre es auch möglich, die Aluminiumfolie linear, also beispielsweise durch Zangen vorzuschieben.In another embodiment of the invention, the individual elements could also be actuated mechanically. Furthermore, it would also be possible to advance the aluminum foil linearly, for example using pliers.

Ein Vorteil der beschriebenen Aufsiegelvorrichtung liegt darin, dass sie problemlos in bestehende Anlagen eingebaut werden kann. Es kann eine Produktionsrate von etwa 40-45 Stück pro Minute erreicht werden. Beim Aufsiegeln kann auf das Metallplättchen zugleich eine Codenummer oder das Verfalldatum aufgeprägt werden. Das Anbringen der Aluminiumplättchen an einer Beutelinnenwand weist den Vorteil auf, dass eine Verletzung, insbesondere eines Fingernagels, ausgeschlossen wird. Mit dem oben beschriebenen auf den Kunststoffbeutel aufgesiegelten Aluminiumplättchen kann auf einfache Art und Weise eine zuverlässige Verschlussmöglichkeit des aufgeschnittenen Kunststoffbeutels erreicht werden.An advantage of the sealing device described is that it can be easily installed in existing systems. A production rate of around 40-45 pieces per minute can be achieved. When sealing, a code number or the expiry date can also be stamped on the metal plate. Attaching the aluminum plates to an inner wall of the bag has the advantage that an injury, in particular a fingernail, is excluded. With the aluminum plate described above sealed onto the plastic bag, a reliable possibility of closing the cut-open plastic bag can be achieved in a simple manner.

Claims (9)

1. Process for attaching a closure element to plastics bags, characterized in that the closure elements consist of plastically deformable laminae (40), at least one lamina being withdrawn by a rotatable conveyor arm (7) from a location where the laminae are available and brought by a movement of rotation into the area of a bag side (4) and sealed onto the bag side by means of a sealing device (11).
2. Process according to patent claim 1, characterized in thata strip (9) is fed from a supply roll (8) to a punching device (6), a lamina (40) is punched out and is moved to the conveyor (7).
3. Process according to patent claim 1, characterized in that the laminae (40) are withdrawn from a magazine and moved to the conveyor (7).
4. Process according to one of the patent claims 1 to 3, characterized in that the lamina (40) is made of metal, preferably of aluminium.
5. Process according to one of the patent claims 1 to 4, characterized in that it is used in a filling installation for filling plastics bags.
6. Device for carrying out the process according to patent claim 1, having a transport device (5) for the bags (4), characterized by a conveyor (7) for transporting at least one lamina (40) into the area of a plastics bag (41), the conveyor being formed as a lever (7) rotatable about an axis, and a sealing device (11) for sealing the lamina onto a bag side.
7. Device according to patent claim 6, characterized by a supply roll (8) for feeding a strip (9) wound thereon to a punching device (6) for punching out a lamina (40) to be transferred to the conveyor (7).
8. Device according to one of the patent claims 6 or 7, characterized in that the lever ends (15, 20) of the conveyor (7) are provided with heating elements (21, 22).
9. Device according to patent claim 6, characterized in that a magazine is provided for stacking the laminae (40).
EP81810148A 1980-04-15 1981-04-15 Method and apparatus for fixing a tag to a plastic bag Expired EP0040170B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2891/80 1980-04-15
CH289180A CH643791A5 (en) 1980-04-15 1980-04-15 METHOD AND DEVICE FOR SEALING PLAINS ON PLASTIC BAGS AND APPLICATION OF THE METHOD AND PRODUCT OF THE METHOD.

Publications (3)

Publication Number Publication Date
EP0040170A2 EP0040170A2 (en) 1981-11-18
EP0040170A3 EP0040170A3 (en) 1981-11-25
EP0040170B1 true EP0040170B1 (en) 1985-02-06

Family

ID=4243920

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Application Number Title Priority Date Filing Date
EP81810148A Expired EP0040170B1 (en) 1980-04-15 1981-04-15 Method and apparatus for fixing a tag to a plastic bag

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US (1) US4398990A (en)
EP (1) EP0040170B1 (en)
CA (1) CA1160090A (en)
CH (1) CH643791A5 (en)
DE (1) DE3168734D1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4586412A (en) * 1984-08-09 1986-05-06 Doboy Packaging Machinery, Inc. Rotary tin-tie cutting mechanism for a packaging machine
CH674192A5 (en) * 1987-11-10 1990-05-15 Geissler Richard Ag
CN106586515A (en) * 2017-02-06 2017-04-26 江阴市汇通包装机械有限公司 Double-cover-loading device
CN107458677A (en) * 2017-07-04 2017-12-12 芜湖纯元光电设备技术有限公司 A kind of detachable adjusting apparatus of aluminum-plastic packaging equipment
CN109703104A (en) * 2019-02-22 2019-05-03 陈爱平 A kind of processing unit (plant) for plastic knitting container bag material mouth ligament
CN113290943B (en) * 2021-05-12 2022-12-16 珠海市鼎胜胶粘塑料环保科技有限公司 Equipment and process for sticking plastic seal of degradable plastic self-sealing bag

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US3181989A (en) * 1962-05-11 1965-05-04 United Carr Inc Snap fastener attaching unit
GB832897A (en) * 1957-07-20 1960-04-21 Herman Wang Improvements in and relating to bags and closures therefor
US3237496A (en) * 1964-04-30 1966-03-01 United Carr Inc Fastener attaching device
US3485697A (en) * 1966-12-06 1969-12-23 Cellu Craft Inc Method and apparatus for forming a plastic bag with an integral pouch
US3555764A (en) * 1967-02-01 1971-01-19 Continental Can Co Apparatus and method for securing closures to container bodies
US3794545A (en) * 1972-02-10 1974-02-26 Mobil Oil Corp Tie-band applicator apparatus
US3882999A (en) * 1972-03-09 1975-05-13 Lester R Wellman Opener/re-closer for sealed containers
US3812572A (en) * 1973-02-14 1974-05-28 Gen Films Inc Tube applicator
US3894381A (en) * 1973-06-21 1975-07-15 Inpaco Method and means for attaching fitments to a bag or pouch on a packaging machine
SE7412277L (en) * 1974-09-30 1976-03-31 Esseltepack Ab PROCEDURE AND DEVICE FOR PREPARING A RECURABLE PASE
GB1485774A (en) * 1974-11-14 1977-09-14 Green Shield Trading Stamp Co Applicators for labels sachets and the like
DE2832391C2 (en) * 1978-07-24 1980-04-30 Windmoeller & Hoelscher, 4540 Lengerich Device for applying web sections to a flat workpiece

Also Published As

Publication number Publication date
CH643791A5 (en) 1984-06-29
EP0040170A2 (en) 1981-11-18
DE3168734D1 (en) 1985-03-21
EP0040170A3 (en) 1981-11-25
US4398990A (en) 1983-08-16
CA1160090A (en) 1984-01-10

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