EP0001386B1 - Apparatus for packaging objects with film - Google Patents

Apparatus for packaging objects with film Download PDF

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Publication number
EP0001386B1
EP0001386B1 EP78100583A EP78100583A EP0001386B1 EP 0001386 B1 EP0001386 B1 EP 0001386B1 EP 78100583 A EP78100583 A EP 78100583A EP 78100583 A EP78100583 A EP 78100583A EP 0001386 B1 EP0001386 B1 EP 0001386B1
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EP
European Patent Office
Prior art keywords
film
articles
edges
sealing
electrode
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Expired
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EP78100583A
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German (de)
French (fr)
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EP0001386A1 (en
Inventor
Heino Ilsemann
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Individual
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Individual
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Publication of EP0001386A1 publication Critical patent/EP0001386A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/06—Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it
    • B65B9/067—Enclosing successive articles, or quantities of material, in a longitudinally-folded web, or in a web folded into a tube about the articles or quantities of material placed upon it the web advancing continuously
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/30—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
    • B65B51/303—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes reciprocating along only one axis

Definitions

  • the invention relates to a device for packaging articles by means of film, the articles being offset laterally to the width of the film webs and the film being connected by connecting devices in the longitudinal and transverse directions of the articles, with a deflecting rod guiding the film in a semi-tubular manner over the articles extends over several lengths of the objects at a small angle to the running direction of the film and transport belts arranged below the film with suction holes through which a vacuum holds the film on the transport belt.
  • Devices of this type are used, in particular, to package cuboid objects, such as books, catalogs, magazines or the like, in film in such a way that the objects can be sent directly, for example, without the need for additional shipping envelopes, if the address is either directly on the packaging prior to packaging Item was printed, an address sheet was packed in the film, or an address field was subsequently glued to the film.
  • the objects in particular their external design, such as book covers, titles, advertising imprints or the like, remain completely visible from the outside when transparent film is used.
  • the invention is therefore based on the object of creating a device of the generic type which, with continuous conveying at high throughput rates, enables clean, smooth packaging, in particular of large-sized cuboid objects, such as books, catalogs, magazines or the like.
  • this object is achieved in that holding and guide rollers rest on the deflecting rod; that deflection points are provided for laterally overlapping the lower and the upper edge of the film on the narrow side of the objects; that the connection devices to the connec that the film edges are arranged laterally next to the narrow side of the objects in the running direction of the film; and that at least one suction belt running above the deflected film part is arranged in the region of the connecting devices in the end region of the deflection points.
  • the holding and guide rollers provided on the device according to the invention ensure good holding and guiding of the film deflected diagonally by the deflecting rod, so that it can be guided smoothly over the objects to be packaged.
  • the suction tape running above the deflected film part in the end region of the longitudinal connecting device ensures that the film is held securely when the film edges are folded over and over one another by means of the deflecting switches and when both the longitudinal and transverse edges are sealed, so that overall a warping of the film is excluded is.
  • the transport belts are led back around a roller and a further roller and further transport belts are provided which run slower than the transport belts leading up to the objects and the film in order to reduce the feed speed of the objects .
  • the film tension is reduced, in particular in the space between two successive objects to be packaged, which facilitates reliable cross-welding.
  • a particularly preferred embodiment of the invention is further characterized in that the connecting device for sealing the transverse edges of the film has a welding stamp with a cutting-like electrode; that cutouts are provided in the side of the cutting-like electrode facing away from the welding point, the upper part of which are partially filled with stable, reinforced insulation material; and that the cross-section of the blade-like electrode is reduced in a region in which the blade-like electrode presses on the double foil layer formed by overlapping the foil edges during cross-welding.
  • liquid-cooled hold-down devices running parallel to the cutting-like electrode of the welding die are arranged to be foldable.
  • the hold-down devices can be brought optimally close to the blade-like electrode without suffering an inadmissible temperature increase, which would result in an undesired additional sealing on the side.
  • the fact that the hold-down devices can be folded close to the cutting-like electrode further promotes the achievement of a narrow weld seam.
  • the film 1, by means of which the objects 2, for example mail order catalogs, are to be packaged, is moved from a supply roll 3 via transport belts 4, 5, of which the transport belt 5 is designed as a suction belt, in the direction of one Sealing station 6 transported.
  • the objects 2 lie on the film 1 above the transport belts 4, 5, which in the exemplary embodiment shown are below the right half of the film 1, so that they are carried by the transport belts 4, 5.
  • a deflecting rod 7 is attached to holding rods 8, which extends obliquely over a transport length of six objects 2 approximately from the area of the supply roll 3 to the sealing station 6.
  • the film 1 is placed over the deflection rod 7 and is guided and deflected by it in the manner shown in the sectional views in FIGS. 1 a to 1 b. Due to the oblique guidance of the deflecting rod 7 over the objects 2, the film 1 is continuously guided over the objects so that it completely covers the surface of the object located there at the point shown in FIG. 1.
  • the transport belt 5 which is provided with suction holes 9, is arranged below the film 1.
  • a plurality of vacuum-loaded suction pipes 10 with suction openings 11 are arranged below the transport belt 5 and hold the film 1 by suction through the suction holes 9, so that this cannot run.
  • a sealing head 23 in the form of a roller 25 provided with a heating spiral 24 for welding the half-tube formed in the manner described above.
  • a welding stamp 26 is provided for attaching the transverse seals between the successive objects 2, as described in the upper part 1 and in particular in FIGS. 2 and 3.
  • the transport belts are interrupted at 27.
  • the conveyor belts 4, which transport the articles 2 and the film 1 to the sealing station 6, run around a roller 28, while new belts 29, which continue the articles 2, continuously engage around a roller 31 on the underside of the articles 2.
  • the rollers 31 rotate at a lower speed than the rollers 28.
  • the conveyor belts 29 run slower than the conveyor belts 4, whereby the objects 2 downstream of the roller 31 are slightly decelerated, so that the distance between the objects is reduced, whereby the Tension of the film 1, which had been taut until then, is released.
  • the welding stamp 26 has a cutting-like electrode 32, which is supplied with electrical current via lines 33, 34, which heats the electrode 32 by resistance heating.
  • the electrode 32 is firmly clamped between the holding blocks 35. From the side of the electrode 32 facing away from the film web 1 and clamped in the holding blocks 35, this is interrupted by cutouts 36 which expand further downward, so that the cutouts have the form of cuts of mushrooms standing upside down and into the cutouts 36 reinforcements (not visible) made of insulation material are introduced in the upper part between the holding blocks 35.
  • a hold-down 37 folded up can be seen, which in the folded-down state does not lie against the electrode 32 on one side, while a corresponding hold-down 37 rests on the other side of the electrode 32 and both hold-downs the film 1 between objects 2 when sealing.
  • the hold-down devices 37 can be brought very close to the electrode 32 without heating up inadmissibly, which would result in an undesirable additional lateral welding effect, since the hold-down devices are liquid-cooled via supply and removal hoses 38, 39.
  • the cross section of the electrode 32 is reduced in the area which is in contact with the part of the film 1 during welding and which is thickened by the longitudinal sealing and the resulting overlap of the edges 14, 15, which results in an increase in the electrical resistance and thus in an increase in temperature .
  • a film 1 coming from the supply roll 3 is placed around the deflecting rod 7 and through the deflecting switches 13 in the manner shown in FIG. 1 with the secondary figures a to d.
  • the objects 2 are then fed above the conveyor belts 4, 5 and guided under the film half which is led over from left to right by the deflecting rod 7 in FIG. 1 and thus between the film 1.
  • the film 1 is held by the vacuum passing through the suction holes 9 of the transport belt 5.
  • the film edges 14, 15 projecting beyond the edges of the objects 2 are placed one above the other by means of the deflection points 13 next to the object 2 around their edges 16, 17 perpendicular to the transport plane, whereby they are prevented from running by the suction belt 18, and then welded by the sealing head 23.
  • the objects 2 then run on the delayed transport belts 29, so that the mutual distance between the objects is reduced.
  • the welding stamp 26 with its cutting-like electrode 32 is pressed onto the film 1 through the relevant space and thereby welds the film perpendicular to the direction of transport between the objects 2, whereby the objects 2 are now completely packaged.

Description

Die Erfindung betrifft eine Vorrichtung zum Verpacken von Gegenständen mittels Folie, wobei die Gegenstände seitlich zur Breite der Folienbahnen versetzt aufgelegt werden und die Folie durch Verbindungseinrichtungen in Längs-und Querrichtung der Gegenstände verbunden wird, mit einer die Folie halbschlauchförmig über die Gegenstände führenden Umlenkstange, die sich über mehrere Längen der Gegenstände unter einem geringen Winkel zur Laufrichtung der Folie erstreckt und unterhalb der Folie angeordneten Transportgurten mit Sauglöchern, durch welche ein Vakuum die Folie am Transportgurt hält.The invention relates to a device for packaging articles by means of film, the articles being offset laterally to the width of the film webs and the film being connected by connecting devices in the longitudinal and transverse directions of the articles, with a deflecting rod guiding the film in a semi-tubular manner over the articles extends over several lengths of the objects at a small angle to the running direction of the film and transport belts arranged below the film with suction holes through which a vacuum holds the film on the transport belt.

Derartige Vorrichtungen dienen insbesondere dazu, quaderförmige Gegenstände, wie Bücher, Kataloge, Zeitschriften o. dgl., in Folie so zu verpacken, dass die Gegenstände beispielsweise ohne das Erfordernis zusätzlicher Versandumschläge direkt versendet werden können, wenn die Anschrift entweder vor dem Verpacken direkt auf den Gegenstand gedruckt wurde, ein Anschriftenblatt mit in die Folie verpackt oder aber nachträglich ein Anschriftenfeld auf die Folie aufgeklebt wird. Die Gegenstände, insbesondere auch deren äusserliche Gestaltung, wie beispielsweise Buchdeckel, Titel, Werbeaufdrucke o. dgl., bleiben bei Verwendung transparenter Folie von aussen vollständig sichtbar.Devices of this type are used, in particular, to package cuboid objects, such as books, catalogs, magazines or the like, in film in such a way that the objects can be sent directly, for example, without the need for additional shipping envelopes, if the address is either directly on the packaging prior to packaging Item was printed, an address sheet was packed in the film, or an address field was subsequently glued to the film. The objects, in particular their external design, such as book covers, titles, advertising imprints or the like, remain completely visible from the outside when transparent film is used.

Bei einer aus der DE-AS 11 74684 vorbekannten Vorrichtung zum Verpacken von Gegenständen mittels Folie wird die Folie durch Umlenkstangen von beiden Seiten des zu verpackenden Gegenstandes über diesen zu einer Mitte geführt, woraufhin der auf diese Weise gebildete Folien-Halbschlauch dort durch Siegelungseinrichtungen verschweisst wird. Anschliesend wird die Folie quer zu ihrer Laufrichtung zwischen den hintereinander beförderten Gegenständen verschweisst, wodurch die Gegenstände vollständig in Folie verpackt werden. Nachteilig ist bei dieser bekannten Vorichtung insbesondere, dass die Folienränder, einander überlappend, auf einer breiten, sichtbaren Fläche des zu verpackenden Gegenstandes, beispielsweise also einer Buchvorder- oder -rückseite, verschweisst werden. Diese überlappende, flächige Verschweissung wirkt ästhetisch nicht sonderlich ansprechend. Störend ist insbesondere, dass durch die Verschweissung die betroffene Fläche, damit auch eine dort gegebenenfalls vorhandene Beschriftung, unterbrochen und teilweise abgedeckt wird, wobei sich bei Zeitschriften und Katalogen als zu verpackende Gegenstände auch die Werbewirksamkeitvermindert. Ausserdem ist das Aufbringen einer doppelten Folie, wie sie bei der hier beschriebenen Vorrichtung vorgesehen ist, wobei also jeweils eine Folienbahn von unten und eine Folienbahn von oben über die zu verpackenden Gegenstände geführt wird, apparativ aufwendig und gestaltet das Verpacken der Gegenstände verhältnismässig kostspielig, weil nämlich auf jeder Seite der Gegenstände ein Schweissvorgang und damit ein hoher apparativer Aufwand erforderlich sind.In a device known from DE-AS 11 74684 for packaging objects by means of film, the film is guided by deflecting rods from both sides of the article to be packaged over this to a center, whereupon the film half-tube formed in this way is welded there by sealing devices . The film is then welded transversely to its direction of travel between the objects conveyed one behind the other, as a result of which the objects are completely packed in film. A disadvantage of this known device is, in particular, that the film edges, overlapping one another, are welded on a wide, visible surface of the object to be packaged, for example on the front or back of a book. This overlapping, flat welding is not particularly aesthetically pleasing. It is particularly disruptive that the welding affects the affected area, including any labeling that may be present there, and partially covers it, and the effectiveness of magazines and catalogs as items to be packaged is also reduced. In addition, the application of a double film, as is provided in the device described here, in which case a film web is guided from below and a film web from above over the objects to be packaged, is apparatus-intensive and makes the packaging of the articles comparatively expensive because namely, a welding process on each side of the objects and thus a high outlay on equipment is required.

Aus der US-PS 3328936 ist eine Vorrichtung der gattungsgemässen Art bekannt geworden, die sich zum Verpacken relativ kleiner, leichter Gegenstände, wie Schokoladenriegel, Seifen o. dgl., eignet, nicht aber für das Verpacken grösserer, quaderförmiger Gegenstände, insbesondere von Katalogen und grossformatigen Büchern, da die Folie bei verhältnismässig grosser Breite und hoher Zuführgeschwindigkeit der Folie, wie sie für einen raschen Verpackungsvorgang wünschenswert ist, nicht hinreichend exakt und insbesondere ohne Verziehen durch die Umlenkstange zu einem Halbschlauch geformt werden kann. Auch wird insbesondere bei hohen Folienvorschubgeschwindigkeiten der nicht durch die mit Sauglöchern versehenen Transportgurte direkt geförderte obere Folienteil gegenüber dem unten liegenden Folienteil verschoben, wodurch ein einwandfreies Verpacken grossformatiger Gegenstände verhindert wird.From US-PS 3328936 a device of the generic type has become known, which is suitable for packaging relatively small, light objects, such as chocolate bars, soaps or the like, but not for packaging larger, rectangular objects, in particular catalogs and large-format books, since the film cannot be formed into a half-tube with sufficient width and high feed speed of the film, as is desirable for a rapid packaging process, and in particular without warping by the deflecting rod. Also, especially at high film feed speeds, the upper film part, which is not directly conveyed by the transport belts provided with suction holes, is shifted relative to the film part below, which prevents perfect packaging of large-sized objects.

Auch eine ähnliche, aus der US-PS 3338021 vorbekannte Vorrichtung zum Verpacken von Gegenständen mittels Folie, bei der Umlenkweichen ein seitliches Übereinanderführen der Folienränder an der Schmalseite der zu verpackenden Gegenstände bewirken, während die Verbindungseinrichtungen die Folienränder in Laufrichtung der Folie seitlich neben der Schmalseite der Gegenstände in Laufrichtung der Folie durch Überlappung verbinden, eignet sich zwar hinreichend zum Verpacken verhältnismässig kleiner Gegenstände, wie einzelner Zigarettenpackungen o. dgl., jedoch ergeben sich Schwierigkeiten beim Verpacken verhältnismässig grossformatiger Gegenstände, wie von Katalogen oder Büchern, mit verhältnismässig steifer, stabiler Folie, die zunächst einmal darauf beruhen, dass bei der bekannten Vorrichtung die Folie vertikal einem Rundläuferkopf zugeführt wird, wobei sich die Gefahr eines Durchhängens ergibt. Ausserdem ist auch bei der bekannten Vorrichtung keine hinreichend präzise Führung der Folie über die zu verpackenden Gegenstände gewährleistet, wobei insbesondere die Gefahr besteht, dass bei grossen Folienbreiten Verziehungen auftreten.Also a similar, from US-PS 3338021 known device for packaging objects by means of film, in the deflecting a lateral overlapping of the film edges on the narrow side of the objects to be packed, while the connecting devices the film edges in the direction of the film laterally next to the narrow side of the Connecting objects in the running direction of the film by overlapping is sufficient for packaging relatively small objects, such as individual cigarette packs or the like, but difficulties arise when packaging relatively large-sized objects, such as catalogs or books, with relatively stiff, stable film, which are based on the fact that in the known device the film is fed vertically to a rotary head, with the risk of sagging. In addition, a sufficiently precise guidance of the film over the objects to be packaged is also not ensured in the known device, there being in particular the risk that warping will occur with large film widths.

Der Erfindung liegt daher die Aufgabe zugrunde, eine Vorrichtung der gattungsgemässen Art zu schaffen, welche bei kontinuierlicher Förderung mit hohen Durchsatzraten ein sauberes, glattes Verpacken insbesondere grossformatiger quaderförmiger Gegenstände, wie Bücher, Kataloge, Zeitschriften o. dgl., ermöglicht.The invention is therefore based on the object of creating a device of the generic type which, with continuous conveying at high throughput rates, enables clean, smooth packaging, in particular of large-sized cuboid objects, such as books, catalogs, magazines or the like.

Erfindungsgemäss wird diese Aufgabe dadurch gelöst, dass auf der Umlenkstange Halte-und Führungsrollen aufliegen; dass Umlenkweichen zum seitlichen Übereinanderführen des unteren und des oberen Randes der Folie an der Schmalseite der Gegenstände vorgesehen sind; dass die Verbindungseinrichtungen zum Verbinden der Folienränder in Laufrichtung der Folie seitlich neben der Schmalseite der Gegenstände angeordnet sind; und dass im Bereich der Verbindungseinrichtungen im Endbereich der Umlenkweichen mindestens ein oberhalb des umgelenkten Folienteiles laufendes Saugband angeordnet ist.According to the invention, this object is achieved in that holding and guide rollers rest on the deflecting rod; that deflection points are provided for laterally overlapping the lower and the upper edge of the film on the narrow side of the objects; that the connection devices to the connec that the film edges are arranged laterally next to the narrow side of the objects in the running direction of the film; and that at least one suction belt running above the deflected film part is arranged in the region of the connecting devices in the end region of the deflection points.

Durch die bei der erfindungsgemässen Vorrichtung vorgesehenen Halte- und Führungsrollen, die auf der Umlenkstange aufliegen, wird eine gute Halterung und Führung der durch die Umlenkstange schräg umgelenkten Folie erreicht, so dass diese glatt über die zu verpackenden Gegenstände geführt werden kann. Das oberhalb des umgelenkten Folienteiles im Endbereich der Längs-Verbindungseinrichtung verlaufende Saugband gewährleistet ein sicheres Halten der Folie beim Um- und Übereinanderlegen der Folienränder mittels der Umlenkweichen sowie bei der Versiegelung sowohl der Längs- als auch der Querränder, so dass insgesamt ein Verziehen der Folie ausgeschlossen ist.The holding and guide rollers provided on the device according to the invention, which rest on the deflecting rod, ensure good holding and guiding of the film deflected diagonally by the deflecting rod, so that it can be guided smoothly over the objects to be packaged. The suction tape running above the deflected film part in the end region of the longitudinal connecting device ensures that the film is held securely when the film edges are folded over and over one another by means of the deflecting switches and when both the longitudinal and transverse edges are sealed, so that overall a warping of the film is excluded is.

Besonders bevorzugte Ausführungsformen der erfindungsgemässen Vorrichtung sind Gegenstand der Unteransprüche. Insbesondere kann vorgesehen sein, dass im Bereich der Siegelungsstation im Anschluss an die Verbindungseinrichtungen die Transportgurte um eine Walze zurückgeführt werden und eine weitere Walze sowie weitere Transportgurte vorgesehen sind, die zum Herabsetzen der Vorschubgeschwindigkeit der Gegenstände langsamer als die die Gegenstände und die Folie heranführenden Transportgurte laufen. Hierdurch wird die Folienspannung insbesondere im Zwischenraum zwischen zwei aufeinanderfolgenden, zu verpackenden Gegenständen vermindert, wodurch ein zuverlässiges Querverschweissen erleichtert wird.Particularly preferred embodiments of the device according to the invention are the subject of the dependent claims. In particular, it can be provided that in the area of the sealing station, following the connecting devices, the transport belts are led back around a roller and a further roller and further transport belts are provided which run slower than the transport belts leading up to the objects and the film in order to reduce the feed speed of the objects . As a result, the film tension is reduced, in particular in the space between two successive objects to be packaged, which facilitates reliable cross-welding.

Eine besonders bevorzugte Ausführungsform der Erfindung zeichnet sich ferner dadurch aus, dass die Verbindungseinrichtung zum Siegeln der Querränder der Folie einen Schweisstempel mit einer schneidenartigen Elektrode aufweist; dass in der Schweisstelle abgewandten Seite der schneidenartigen Elektrode Ausbrüche vorgesehen sind, die in ihrem oberen Teil mit stabilem, verstärktem Isolationsmaterial teilweise gefüllt sind; und dass der Querschnitt der schneidenartigen Elektrode in einem Bereich verringert ist, in dem die schneidenartige Elektrode beim Querverschweissen auf die durch Überlappen der Folienränder gebildete doppelte Folienschicht aufdrückt. Durch die vorstehend angegebene Merkmalskombination werden die Quersiegelungsnähte in vorteilhafter Weise in ihrer Breite verringert, da die schneidenartig ausgebildete Elektrode eine höhere Temperatur ermöglicht, wobei trotz Widerstandserhöhung und damit höherer Elektrodentemperatur deren Stabilität beim Siegelvorgang gewährleistet ist, insbesondere wegen des stabilen, verstärkenden Isolationsmaterials, welches die Ausbrüche in ihrem oberen Teil füllt.A particularly preferred embodiment of the invention is further characterized in that the connecting device for sealing the transverse edges of the film has a welding stamp with a cutting-like electrode; that cutouts are provided in the side of the cutting-like electrode facing away from the welding point, the upper part of which are partially filled with stable, reinforced insulation material; and that the cross-section of the blade-like electrode is reduced in a region in which the blade-like electrode presses on the double foil layer formed by overlapping the foil edges during cross-welding. The combination of features given above advantageously reduces the width of the transverse sealing seams, since the cutting-like electrode enables a higher temperature, and despite the increase in resistance and thus higher electrode temperature, its stability is ensured during the sealing process, in particular because of the stable, reinforcing insulation material which the Fills breakouts in their upper part.

Bei der letztgenannten Ausführungsform der Erfindung kann weiterhin vorgesehen sein, dass parallel zur schneidenartigen Elektrode des Schweisstempels verlaufende flüssigkeitsgekühlte Niederhalter fortklappbar angeordnet sind. Die Niederhalter können optimal dicht an die schneidenartige Elektrode herangebracht werden, ohne dass sie eine unzulässige Temperaturerhöhung erlitten, die ein unerwünschtes seitliches, zusätzliches Versiegeln bewirken würde. Dadurch, dass die Niederhalter nahe an die schneidenartige Elektrode herangeklappt werden können, wird die Erzielung einer schmalen Schweissnaht weiter gefördert.In the last-mentioned embodiment of the invention, it can further be provided that liquid-cooled hold-down devices running parallel to the cutting-like electrode of the welding die are arranged to be foldable. The hold-down devices can be brought optimally close to the blade-like electrode without suffering an inadmissible temperature increase, which would result in an undesired additional sealing on the side. The fact that the hold-down devices can be folded close to the cutting-like electrode further promotes the achievement of a narrow weld seam.

Nachstehend ist ein Ausführungsbeispiel der Erfindung anhand derZeichnung im einzelnen erläutert. Dabei zeigt:

  • Fig. ein Ausführungsbeispiel der Vorrichtung nach der Erfindung in der Draufsicht, wobei in den Nebenzeichnungen a bis b Teilschnitte durch die Vorrichtung mit Blick in Transportrichtung der zu verpackenden Gegenstände wiedergegeben sind;
  • Fig. einen Blick auf die schneidenartige Elektrode bei zurückgeklapptem Niederhalter; und
  • Fig. 3 die Anpressfläche der schneidenartigen Elektrode in der Ansicht von unten.
An embodiment of the invention is explained in detail below with reference to the drawing. It shows:
  • Fig. An embodiment of the device according to the invention in plan view, wherein in the secondary drawings a to b partial sections through the device are shown with a view in the transport direction of the objects to be packaged;
  • Fig. A view of the blade-like electrode with the hold-down device folded back; and
  • Fig. 3 shows the contact surface of the cutting-like electrode in the view from below.

Wie die Zeichnung zeigt, wird die Folie 1, mittels welcher die Gegenstände 2, beispielsweise also Versandhaus-Kataloge, verpackt werden sollen, von einer Vorratsrolle 3 über Transportgurte 4, 5, von denen der Transportgurt 5 als Saugband ausgebildet ist, in Richtung auf eine Siegelungsstation 6 transportiert. Oberhalb der Transportgurte 4, 5, die sich beim dargestellten Ausführungsbeispiel unterhalb der rechten Hälfte der Folie 1 befinden, liegen auf der Folie 1 die Gegenstände 2, so dass sie also durch die Transportgurte 4, 5 getragen werden. Oberhalb der Förderebene ist eine Umlenkstange 7 an Haltestangen 8 angebracht, die sich etwa vom Bereich der Vorratsrolle 3 bis zur Siegelungsstation 6 schräg über eine Transportlänge von sechs Gegenständen 2 erstreckt. Die Folie 1 ist so über die Umlenkstange 7 gelegt und wird von dieser derart geführt und umgelenkt, wie es in den Schnittdarstellungen der Fig. la bis 1b dargestellt ist. Durch die schräge Führung der Umlenkstange 7 über die Gegenstände 2 wird die Folie 1 fortlaufend über die Gegenstände geführt, so dass sie an der in Fig. 1 wiedergegebenen Stelle die Oberfläche des dort befindlichen Gegenstandes vollständig überdeckt.As the drawing shows, the film 1, by means of which the objects 2, for example mail order catalogs, are to be packaged, is moved from a supply roll 3 via transport belts 4, 5, of which the transport belt 5 is designed as a suction belt, in the direction of one Sealing station 6 transported. The objects 2 lie on the film 1 above the transport belts 4, 5, which in the exemplary embodiment shown are below the right half of the film 1, so that they are carried by the transport belts 4, 5. Above the conveying plane, a deflecting rod 7 is attached to holding rods 8, which extends obliquely over a transport length of six objects 2 approximately from the area of the supply roll 3 to the sealing station 6. The film 1 is placed over the deflection rod 7 and is guided and deflected by it in the manner shown in the sectional views in FIGS. 1 a to 1 b. Due to the oblique guidance of the deflecting rod 7 over the objects 2, the film 1 is continuously guided over the objects so that it completely covers the surface of the object located there at the point shown in FIG. 1.

Zur Unterstützung des Umlenkens der Folie 1 durch die Umlenkstange 7, insbesondere auch zwecks Verhinderung eines Verziehens oder Verlaufens der Folie 1 beim Transport, ist unterhalb der Folie 1 der Transportgurt 5 angeordnet, der mit Sauglöchern 9 versehen ist. Mehrere vakuumbeaufschlagte Saugrohre 10 mit Saugöffnungen 11 sind unterhalb des Transportgurtes 5 angeordnet und halten ansaugend die Folie 1 über die Sauglöcher 9 fest, so dass diese nicht verlaufenkann.To support the deflection of the film 1 by the deflecting rod 7, in particular also to prevent warping or running of the film 1 during transport, the transport belt 5, which is provided with suction holes 9, is arranged below the film 1. A plurality of vacuum-loaded suction pipes 10 with suction openings 11 are arranged below the transport belt 5 and hold the film 1 by suction through the suction holes 9, so that this cannot run.

Auf der Umlenkstange 7 liegen an mehreren Stellen Halte- und Führungsrollen 12 auf, welche die Folie 1 fest an die Umlenkstange 7 andrücken und so das Umlenken der Folie 1 unterstützen. Vor der Siegelungsstation 6 sind Umlenkweichen 13 angebracht, die den flachliegenden Rand 14 des unteren Teils der Folie 1 sowie den weitgehend durch den Endbereich der Umlenkstange 7 waagerecht gespannten Rand 15 des oberen Teils der Folie 1 um Kanten 16, 17 des Gegenstandes 2 herum an der zwischen diesen Kanten, also bei 16, 17, definierten Schmalseite des Gegenstandes 2 übereinanderlegen, wie es in Fig. 1 b deutlich zu erkennen ist. Um ein Verrutschen und Verlaufen des oberen Teils der Folie 1 hierbei zu vermeiden, ist im Bereich der Siegelungsstation 6 ein oberes, endloses Saugband 18 mit Sauglöchern 19 vorgesehen, durch dessen Sauglöcher die Folie 1 von der Öffnung 21 weiterer Saugrohre 22 gehalten wird.Holding and guide rollers 12, which press the film 1 firmly against the deflecting rod 7, rest on the deflecting rod 7 at several points and thus support the deflection of the film 1. In front of the sealing station 6 deflection switches 13 are attached, which cover the flat edge 14 of the lower part of the film 1 and the edge 15 of the upper part of the film 1, which is largely stretched horizontally by the end region of the deflection rod 7, around edges 16, 17 of the object 2 overlap the narrow side of the object 2 defined between these edges, that is at 16, 17, as can be clearly seen in FIG. 1b. In order to prevent the upper part of the film 1 from slipping and running, an upper, endless suction belt 18 with suction holes 19 is provided in the area of the sealing station 6, through the suction holes of which the film 1 is held by the opening 21 of further suction pipes 22.

Bei den Umlenkweichen 13 befindet sich zum Verschweissen des in der vorstehend beschriebenen Weise gebildeten Halbschlauches ein Siegelungskopf 23 in Form einer mit einer Heizspirale 24 versehenen Rolle 25. Zur Anbringung der Querversiegelungen zwischen den aufeinanderfolgenden Gegenständen 2 ist ein Schweisstempel 26 vorgesehen, wie er im oberen Teil der Fig. 1 und insbesondere in den Fig. 2 und 3 dargestellt ist.At the deflection points 13 there is a sealing head 23 in the form of a roller 25 provided with a heating spiral 24 for welding the half-tube formed in the manner described above. A welding stamp 26 is provided for attaching the transverse seals between the successive objects 2, as described in the upper part 1 and in particular in FIGS. 2 and 3.

Zur Verminderung der beim Aufsetzen des Schweisstempels 26 auf die Folie 1 zwischen den Gegenständen 2 ausgeübte Zugspannung sind die Transportgurte bei 27 unterbrochen. Die die Gegenstände 2 und die Folie 1 zur Siegelungsstation 6 hintransportierenden Transportgurte 4 laufen um eine Walze 28, während neuansetzende, die Gegenstände 2 fortführende Bänder 29 um eine Walze 31 laufend an der Unterseite der Gegenstände 2 angreifen. Die Walzen 31 drehen sich mit einer geringeren Geschwindigkeit als die Walzen 28. Somit laufen die Transportgurte 29 langsamer als die Transportgurte 4, wodurch die Gegenstände 2 stromab der Walze 31 leicht verzögert werden, so dass sich also der Abstand zwischen den Gegenständen vermindert, wodurch die Spannung der bis dahin stramm gespannten Folie 1 aufgehoben wird.To reduce the tensile stress exerted between the objects 2 when the welding stamp 26 is placed on the film 1, the transport belts are interrupted at 27. The conveyor belts 4, which transport the articles 2 and the film 1 to the sealing station 6, run around a roller 28, while new belts 29, which continue the articles 2, continuously engage around a roller 31 on the underside of the articles 2. The rollers 31 rotate at a lower speed than the rollers 28. Thus, the conveyor belts 29 run slower than the conveyor belts 4, whereby the objects 2 downstream of the roller 31 are slightly decelerated, so that the distance between the objects is reduced, whereby the Tension of the film 1, which had been taut until then, is released.

Der Schweisstempel 26 weist als wirksames Teil eine schneidenartige Elektrode 32 auf, die über Leitungen 33, 34 mit elektrischem Strom beaufschlagt wird, der die Elektrode 32 durch Widerstandsbeheizen aufheizt. Die Elektrode 32 ist zwischen Halteblöcken 35 fest eingespannt. Von der der Folienbahn 1 abgewandten, in die Halteblöcke 35 eingespannten Seite der Elektrode 32 her ist diese durch Ausbrüche 36 unterbrochen, die sich weiter nach unten hin erweitern, so dass die Ausbrüche die Form von Schnitten auf dem Kopf stehender Pilze haben und in die Ausbrüche 36 sind in deren oberen Teil zwischen den Halteblöcken 35 Verstärkungen (nicht sichtbar) aus Isolationsmaterial eingebracht.As an effective part, the welding stamp 26 has a cutting-like electrode 32, which is supplied with electrical current via lines 33, 34, which heats the electrode 32 by resistance heating. The electrode 32 is firmly clamped between the holding blocks 35. From the side of the electrode 32 facing away from the film web 1 and clamped in the holding blocks 35, this is interrupted by cutouts 36 which expand further downward, so that the cutouts have the form of cuts of mushrooms standing upside down and into the cutouts 36 reinforcements (not visible) made of insulation material are introduced in the upper part between the holding blocks 35.

Von den Seitenenden der Halteblöcke 35 aus ist ein nach oben geklappter Niederhalter 37 erkennbar, der im heruntergeklappten Zustand nicht an der Elektrode 32 auf der einen Seite anliegt, während ein entsprechender Niederhalter 37 auf der anderen Seite der Elektrode 32 anliegt und beide Niederhalter die Folie 1 zwischen den Gegenständen 2 beim Versiegeln niederdrücken. Die Niederhalter 37 können äusserst nahe an die Elektrode 32 herangebracht werden, ohne dass sie sich unzulässig aufheizen, wodurch eine unerwünschte, zusätzliche seitliche Schweisswirkung erzielt würde, da die Niederhalter über Zuführungs- und Wegführungsschläuche 38, 39 flüssigkeitsgekühlt sind. Die Elektrode 32 ist in dem beim Verschweissen an dem Teil der Folie 1 angreifenden Bereich, der durch die Längsversiegelung und das dadurch bedingte Überlappen der Ränder 14, 15 verdickt ist, in ihrem Querschnitt reduziert, woraus eine Erhöhung des elektrischen Widerstandes und damit eine Temperaturerhöhung resultieren.From the side ends of the holding blocks 35, a hold-down 37 folded up can be seen, which in the folded-down state does not lie against the electrode 32 on one side, while a corresponding hold-down 37 rests on the other side of the electrode 32 and both hold-downs the film 1 between objects 2 when sealing. The hold-down devices 37 can be brought very close to the electrode 32 without heating up inadmissibly, which would result in an undesirable additional lateral welding effect, since the hold-down devices are liquid-cooled via supply and removal hoses 38, 39. The cross section of the electrode 32 is reduced in the area which is in contact with the part of the film 1 during welding and which is thickened by the longitudinal sealing and the resulting overlap of the edges 14, 15, which results in an increase in the electrical resistance and thus in an increase in temperature .

Zum Verpacken der Gegenstände 2 wird eine von der Vorratsrolle 3 kommende Folie 1 in der in Fig. 1 mit den Nebenfiguren a bis d gezeigten Weise um die Umlenkstange 7 und durch die Umlenkweichen 13 gelegt. Die Gegenstände 2 werden sodann oberhalb der Transportgurte 4, 5 zugeführt und unter die durch die Umlenkstange 7 in Fig.1 von links nach rechts herübergeführte Folienhälfte und damit zwischen die Folie 1 geführt. Um beim Hinüberführen der Folie 1 ein Verlaufen derselben zu vermeiden, wird die Folie 1 durch das durch die Sauglöcher 9 des Transportgurtes 5 tretende Vakuum gehalten. Im Bereich der Siegelungsstation 6 werden die über die Ränder der Gegenstände 2 hinausstehenden Folienränder 14, 15 mittels der Umlenkweichen 13 neben den Gegenstand 2 um deren Kanten 16, 17 herum senkrecht zur Transportebene übereinander gelegt, wobei sie am Verlaufen durch das Saugband 18 gehindert werden, und anschliessend durch den Siegelungskopf 23 verschweisst.To pack the objects 2, a film 1 coming from the supply roll 3 is placed around the deflecting rod 7 and through the deflecting switches 13 in the manner shown in FIG. 1 with the secondary figures a to d. The objects 2 are then fed above the conveyor belts 4, 5 and guided under the film half which is led over from left to right by the deflecting rod 7 in FIG. 1 and thus between the film 1. In order to prevent the film 1 from running over it, the film 1 is held by the vacuum passing through the suction holes 9 of the transport belt 5. In the area of the sealing station 6, the film edges 14, 15 projecting beyond the edges of the objects 2 are placed one above the other by means of the deflection points 13 next to the object 2 around their edges 16, 17 perpendicular to the transport plane, whereby they are prevented from running by the suction belt 18, and then welded by the sealing head 23.

Daraufhin laufen die Gegenstände 2 auf die verzögerten Transportgurte 29, so dass der gegenseitige Abstand der Gegenstände vermindert wird. Beim Durchlaufen eines Zwischenraumes zwischen zwei aufeinanderfolgenden Gegenständen 2 wird der Schweisstempel 26 mit seiner schneidenartigen Elektrode 32 durch den betreffenden Zwischenraum auf die Folie 1 gedrückt und verschweisst hierdurch die Folie senkrecht zur Transportrichtung zwischen den Gegenständen 2, wodurch die Gegenstände 2 nun vollständig verpackt sind.The objects 2 then run on the delayed transport belts 29, so that the mutual distance between the objects is reduced. When passing through a space between two successive objects 2, the welding stamp 26 with its cutting-like electrode 32 is pressed onto the film 1 through the relevant space and thereby welds the film perpendicular to the direction of transport between the objects 2, whereby the objects 2 are now completely packaged.

Claims (12)

1. Apparatus for the film-packaging of articles, the latter being laterally offset in relation to the width of the film webs, the film being sealed by sealing means longitudinally and transversely of the articles, comprising a deflector rod which guides the film in semitubular form over the articles and which extends over several article lengths at a slight angle to the direction of movement of the film, and further comprising conveyor belts which are disposed beneath the film and which have suction holes via which a vacuum holds the film on the conveyor belt, characterised in that retaining and guide rollers (12) bear on the deflector rod (7); deflector rails (13) are provided to guide the bottom and top edges (14, 15) of the film (1) over one another at the narrow side (at 16, 17) of the articles; the sealing means (23) for sealing the film edges (14, 15) are disposed laterally adjacent the narrow side (at 16, 17) of the articles as considered in the direction of the film movement; and at least one suction belt (18) running above the deflected part of the film is disposed in the end zone of the deflector rails (13) in the region of the sealing means (23).
2.Apparatus according to claim 1, characterised in that the deflector rod (7) extends at an angle of less than 25° to the direction of film movement.
3. Apparatus according to claim 1 or 2, characterised in that the or each conveyer beld (5) extends substantially continuously over the lenght of the deflector rod (7).
4. Apparatus according to claim 1 or 2, characterised in that a plurality of consecutive conveyor belts (5) are provided, each extending over only portions of the length of the deflector rod (7).
5. Apparatus according to any one of the preceding claims, characterised in that a film cutting station for cutting at least one of the film edges (14, 15) is provided upstream of the station where the articles (2) are deposited on the conveyor so that the film (1) can be adjusted to match product size variations due more particularly to enclosures.
6. Apparatus according to any one of the preceding claims, characterised in that the deflector rails (13) guide the edges (14, 15) of the film (1) flat one above the other on to the narrow sides (at 16,17) of the articles (2).
7. Apparatus according to any one of the preceding claims, characterised in that the angle at which the suction belt (18) is inclined to the direction of the movement of articles (2) is adjustable.
8. Apparatus according to any one of the preceding claims, characterised in that the sealing means comprise a sealing head (23) adjustable from above the film into a position below the same.
9. Apparatus according to claim 8, characterised in that a sealing station (6) comprising the sealing head (23) is followed by a cooling station for cooling the sealed overlapping edge zone of the film edges (14,15).
10. Apparatus according to any one of the preceding claims, characterised in that in the zone of the sealing station (6) following the sealing means (23) the conveyor belts (4, 5) are reversed around a roller (28) and another roller (31) and other conveyor belts (29) are provided which, in order to reduce the feed speed of the articles (2), move more slowly than the conveyor belts (4, 5) feeding the articles (2) and the film (1).
11. Apparatus according to any one of the preceding claims, characterised in that the sealing means for sealing the transverse edges of the film (1) comprises a welding bar (26) with an electrode in the form of a knife-edge; recesses (36) are formed in the electrode (32) on the side remote from the site of the weld, and the top part of said recesses is partially filled with stable reinforced insulating material; and the cross-section of the electrode (32) is reduced in a zone (41) in which the electrode (32) presses, during transverse welding, on the double film layer formed by overlapping of the film edges (14,15).
12. Apparatus according to claim 11, characterised in that swing-away liquid-cooled work holders (37) are disposed in parallel relationship to the welding electrode (32).
EP78100583A 1977-08-09 1978-08-03 Apparatus for packaging objects with film Expired EP0001386B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2735889A DE2735889C2 (en) 1977-08-09 1977-08-09 Device for packing books, catalogs, magazines or the like by means of foil
DE2735889 1977-08-09

Publications (2)

Publication Number Publication Date
EP0001386A1 EP0001386A1 (en) 1979-04-18
EP0001386B1 true EP0001386B1 (en) 1981-01-07

Family

ID=6015997

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78100583A Expired EP0001386B1 (en) 1977-08-09 1978-08-03 Apparatus for packaging objects with film

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EP (1) EP0001386B1 (en)
DE (1) DE2735889C2 (en)
IT (1) IT1098238B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4231210A (en) * 1979-04-24 1980-11-04 Nagode Gerald E Package wrapping machine
DE3102872A1 (en) * 1981-01-29 1982-08-26 Lesch, Hans, 8100 Garmisch-Partenkirchen Method and device for wrapping slabs or bars of chocolate with a packaging film, especially with metal foil
DE3230083A1 (en) * 1982-08-13 1984-02-16 Otto Hänsel GmbH, 3000 Hannover METHOD AND DEVICE FOR COVERING, IN THE WEST, FLAT, PLEASANT OR FOOD PARTS, IN PARTICULAR. CHOCOLATE BARS OR BAR WITH A PACKAGING FILM
US6138436A (en) * 1998-01-28 2000-10-31 Illinois Tool Works, Inc. Feeding of horizontal form-fill-and-seal zipper machine
US6185907B1 (en) * 1998-01-28 2001-02-13 Illinois Tool Works Inc. Horizontal form-fill-and-seal machine with zipper attachment
DE19817455C2 (en) * 1998-04-20 2000-03-09 Hugo Beck Gmbh & Co Kg Verpack Device for packaging flat, flexible packaging goods in a packaging bag
DE10021470B4 (en) * 2000-05-04 2004-12-09 Werner Diez Tubular bag packaging machine with transverse extenders
DE102004030402B4 (en) * 2004-03-22 2009-08-13 Reindl, Franz Jun. Method for packing bulk material

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Publication number Priority date Publication date Assignee Title
US2886930A (en) * 1957-03-19 1959-05-19 Clarence L Martin Meat patty forming and wrapping apparatus
FR1215198A (en) * 1958-11-10 1960-04-15 Improvements in processes and equipment for the manufacture of plastic containers
US3022613A (en) * 1959-06-15 1962-02-27 Bemis Bro Bag Co Packaging method
DE1174684B (en) * 1960-08-24 1964-07-23 Forgrove Mach Folded channel to form a sleeve tube for wrapping piece goods
US3028294A (en) * 1961-02-13 1962-04-03 William N Histed Heat sealing and cutting apparatus
US3338021A (en) * 1963-05-09 1967-08-29 Hauni Werke Koerber & Co Kg Method and apparatus for wrapping cigarette packs and the like
US3340673A (en) 1963-06-17 1967-09-12 Kimberly Clark Co Article wrapping machine
US3328936A (en) * 1964-01-02 1967-07-04 Milprint Inc Method and apparatus for wrapping deformable articles
US3560305A (en) * 1967-11-21 1971-02-02 William W Hints Heat-sealing machine
US3551261A (en) * 1968-09-20 1970-12-29 William N Histed Heat sealing and cutting member for heat sealing overlying films of material
US3653177A (en) * 1970-03-02 1972-04-04 G T Schjeldahl Retarder mechanism
CA933849A (en) 1971-08-10 1973-09-18 N. Histed William Heat sealing apparatus

Also Published As

Publication number Publication date
EP0001386A1 (en) 1979-04-18
IT7826616A0 (en) 1978-08-09
DE2735889A1 (en) 1979-02-15
IT1098238B (en) 1985-09-07
DE2735889C2 (en) 1983-09-08

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