EP0459311A2 - Plastic foil bag - Google Patents

Abstract

A plastic foil bag, in particular a so-called security bag, which is used for example for the conveyance of currency, valuables, documents or the like, exhibits a fold-down closure flap with a tamper-indication closure. In order to make tampering with the foil bag or its contents unmistakably evident, the tamper-indication closure exhibits a metal layer of a few mu thickness connected to the closure flap and an adhesive layer applied to it, which is provided with a protective layer covering it before use, after whose removal and after the closure flap is folded down the metal layer can be connected to the foil bag via the adhesive layer.

Description

The invention relates to a plastic bag for payment, valuables, documents or the like with a foldable closure flap and with a guarantee closure.

Foil bags of this structure are used by banks, authorities etc. for internal and external transport, in particular for the messenger transport of cash and non-cash means of payment, other valuables, documents, securities or the like. For this purpose, the foil pouch has a labeling field in which the sender, the recipient and the messenger are entered by name and, if necessary, the delivery date and other information intended for the recipient are entered. As a rule, the closure flap is provided with a detachable slip strip, which the sender detaches when the seal is closed and is kept as a slip. Foil pouch and document strips are provided with the same identification number.

In order to prevent the film bag from being opened on the way from the sender to the recipient and parts of its contents being removed without authorization, the film bag has a guarantee closure. This consists of an adhesive layer on the inside of the closure flap with strong adhesive force, which is initially covered by a protective layer, e.g. B. a silicone paper is covered. Furthermore, one or more lines of weakness, e.g. B. perforations on the closure flap, which are in the region of the adhesive layer. After filling the film bag, pulling off the protective layer and folding the flap over, it is pressed onto the film bag so that the adhesive comes into effect. An opening of the closure flap by tearing open is possible without any problems, however, the closure flap tears open in the area of the material weakening lines and can then no longer be closed in a way as is the case with the undamaged guarantee closure. Unauthorized manipulations can consequently be identified on the closure flap and the recipient can determine by means of content control whether parts of the content have been removed on the transport route by persons involved in the transport.

It has been shown that manipulations are nevertheless possible in practice and cannot be noticed by the recipient. The reason lies in the inadequate temperature stability of the adhesives known for plastics. The adhesive force of these adhesives is reduced by heating or also by low temperatures to such an extent that the closure flap can be released without damage and the lines of weakness of the material do not tear open.

The invention has for its object to provide a film bag of the structure described above with a guarantee closure, the tampering of any kind can be recognized or prevents third parties from tampering because of the easy recognition.

This object is achieved in that the guarantee closure has a metal layer connected to the flap of a few micron thickness and an adhesive layer applied thereon, which is provided with a protective layer covering it before use, after removing and flipping the flap, the metal layer over the adhesive layer can be connected to the film pouch.

Another equivalent solution to the problem arises from the fact that the guarantee closure has a metal layer of a few μ thickness and an adhesive layer applied thereon, which is provided with a protective layer covering it before use, and that after the protective layer has been removed, the metal layer over the adhesive layer with the Foil bag and after folding the flap can be connected to this.

The handling of the film bag designed according to the invention is essentially the same as in the prior art. After the film pouch has been filled, the protective layer is pulled off the adhesive layer, the closure flap is folded over and the metal layer is connected to the film pouch by pressing over the adhesive layer. An essential part of the guarantee closure designed according to the invention is the extremely thin metal layer, which is obtained by metallizing, e.g. B. vapor deposition, spraying or the like can be obtained or can be formed from an extremely thin film. Such a thin metal layer has only a very low tensile strength and tear strength, which is considerably lower than that of the plastic of the film bag. Furthermore, the metal layer stands out optically from the film pocket, which can be supported by the fact that it is a mirror-like shiny metal layer. The low tensile strength means that when the tamper-evident seal is tampered with, no matter how low the adhesive force of the adhesive, the metal layer tears and parts of the layer stick to one side or the other. The guarantee lock can then no longer be closed in such a way that this damage to the metal layer cannot be recognized. In the case of a mirror-reflective metal layer, such damage can easily be recognized optically by the irregular reflection.

Even if the guarantee closure or the adhesive layer is exposed to elevated or very low temperatures, the remaining low adhesive force is sufficient to show the aforementioned effects. The design according to the invention is also suitable for mailing bags to replace a conventional seal.

In a preferred embodiment it is provided that the metal layer is applied to a transparent carrier tape and can be connected over part of its width to the closure flap and to the part projecting beyond it by means of the adhesive layer arranged on the other side with the film pocket.

The guarantee closure, which is designed in the form of a separate band in this embodiment, can already be attached to the film bag in the factory or can be attached to the closure flap by the user afterwards. Part of the metal layer adheres to the closure flap, while the other part after closure adheres to the foil pouch. The metal layer is protected against damage from the carrier tape. The slightest manipulation of the carrier tape or the flap will damage the metal layer. The entire closure can be formed solely by the adhesive layer. Advantageously, however, the closure flap - as in the known embodiment - has its own adhesive layer covered by a protective layer in order to obtain a tight and large-area closure which absorbs the forces which are effective during transport. The adhesive layer of the closure flap can, but does not have to fulfill a guarantee function. Manipulations on the guarantee closure, ie damage to the metal layer, can be easily recognized optically due to the transparent design of the carrier tape. The version is also particularly suitable for sealing mailers.

In a further preferred embodiment it is provided that the protective layer is divided lengthwise, one part of which is assigned to the part of the carrier tape to be connected to the closure flap and the other part of which is assigned to the part of the carrier tape or the metal layer to be connected to the film pocket. The guarantee closure can already be attached at the factory by adhering one part of the carrier tape to the film pocket or to the closure flap after removing the corresponding part of the protective layer, while the other part is pressed on by the user after removing the protective layer still present there. Instead, the carrier tape can also be supplied separately.

The user peels off part of the protective layer and adheres the carrier tape with the metal layer to the closure flap. Then he draws the second part the protective layer, puts the flap over and adheres the other part of the carrier tape with the metal layer to the film pocket via the adhesive layer. The metal layer thus bridges the edge of the closure flap, so that opening the flap or even trying to open it will damage the metal layer.

For mechanical and manual processing, it is advantageous if the carrier tape with the metal layer, the adhesive layer and the protective layer is designed as an endless belt, from which the required length for the guarantee closure can be separated.

The carrier tape is preferably made of polyester, while the film bag can consist of the plastics usually used for this purpose, such as polyethylene or the like.

Instead of an additional carrier tape, it can also be provided according to the invention that the closure flap is transparent at least in some areas and that the metal layer and the adhesive layer is applied to the inside thereof at least in the transparent area.

In this embodiment, the guarantee closure is integrated into the film pouch, in that the metal layer is applied to the inside of the transparent closure flap and the adhesive layer is in turn applied to the metal layer. Here, too, the adhesive layer is of course covered with a protective layer. Such a film bag can be completely manufactured in the factory without any problems. The user only needs to remove the protective layer, flip the flap over and press it on. In this case, the metal layer is completely between the closure flap and the film pocket. The Metal layer can be evaporated or sprayed directly onto the closure flap or the film used to produce the film pocket, or else connected to it via an adhesive layer. In this version too, manipulations on the closure flap directly damage the metal layer. Any damage to the metal layer can be seen from the outside due to the transparent design of the closure flap.

As indicated at the beginning, the known film bags - also called security bags - are provided with a slip strip which remains with the person who fills and closes the film bag. Such a document strip can also be used in connection with the construction of the guarantee closure according to the invention. If the guarantee closure is formed by a carrier tape with a metal layer, then, as in the prior art, the document strip can be part of the closure flap and connected to it via a material weakening line. In this case, the carrier tape is then applied to the closure flap so that the longitudinal division of the protective layer coincides approximately with the line of weakness.

If, in this embodiment, the carrier tape or the metal layer is already applied at the factory, then its other part and the protective layer still present there protrude above the line of weakness between the flap and the slip strip. In this case, the cover strip is separated after the flap has been flipped over and pressed on using its own adhesive layer. The protective layer is then removed from the adhesive layer of the carrier tape or the metal layer and adhered to the film pocket. In this case, too, it bridges the edge of the closure flap.

Instead, the document strip can also be a part separated from the film pocket and then form part of the protective layer on the carrier tape.

In this version, there is no duplication of document strips and carrier tape and the protective layer also fulfills the function of the document strip. The user only needs to pull off the document strip and thus the protective layer in order to be able to close the flap with the guarantee closure in one go.

As already indicated, the metal layer can be applied by vapor deposition, so that it can be made as thin as desired.

In a further embodiment of the invention it is provided that the metal layer is designed as a two- or three-dimensional hologram.

By forming the metal layer as a hologram, any information, company logo or the like can be made visible. Furthermore, training as a hologram has the advantage that tampering with the guarantee closure tends to damage not only the metal layer but also the hologram and is therefore even more easily recognizable. Such holograms can also be designed in a manufacturer-specific manner, so that the producer of the hologram tape and the manufacturer of the film pouch can also enter into guarantee agreements with third parties.

Figur 1

eine perspektivische Ansicht der Folientasche während des Schließvorgangs;

Figur 2

einen Schnitt II - II im Bereich des Garantieverschlusses im vergrößerten Maßstab während des Verschließvorgangs;

Figur 3

einen Schnitt des Trägerbandes mit der Metallschicht vor dem Anbringen an der Folientasche;

Figur 4

einen der Figur 2 ähnlichen Schnitt der Folientasche im geschlossenen Zustand;

Figur 5

einen der Figur 2 ähnlichen Schnitt einer anderen Ausführungsform der Folientasche im Ausgangszustand und

Figur 6

die Folientasche gemäß Figur 5 im geschlossenen Zustand.

The invention is described below with reference to exemplary embodiments shown in the drawing. The drawing shows:

Figure 1

a perspective view of the film bag during the closing process;

Figure 2

a section II - II in the area of the guarantee closure on an enlarged scale during the closing process;

Figure 3

a section of the carrier tape with the metal layer before attachment to the film bag;

Figure 4

a similar to Figure 2 section of the film bag in the closed state;

Figure 5

a section similar to Figure 2 of another embodiment of the film bag in the initial state and

Figure 6

5 in the closed state.

The film bag 1 according to FIG. 1 consists of a plastic film and is used for expending money, valuables, documents or the like. It is made from an endless film, which is folded, for example, along a line forming the later lower edge 2 to form a double layer. The double-layer foils are welded together at intervals corresponding to the width of the pocket to form the longitudinal edges 3. The weld seam is indicated at 4. On the side of the film pocket that forms the later opening 5 (FIG. 2), one film layer projects beyond the other, forming a closure flap 6.

Part of the closure flap 6 is designed as a slip strip 8, which is separated from the closure flap by a line of weakness 7, e.g. B. a perforation or the like, is delimited and can be separated from the flap in this way.

In the embodiment shown in Figures 1 to 4, the flap 6 has an adhesive layer 9 on the inside, which by a protective strip 10, z. B. a silicone paper is covered and can be exposed by peeling it off.

The film pouch also has a guarantee closure 11, which is produced from a material strip according to FIG. 3. The material tape has a transparent carrier tape 12, e.g. B. made of polyester, which is provided on one side with a metal layer 13 which is applied for example by vapor deposition, spraying or the like. This metal layer 13 is preferably designed in the form of a hologram. In turn, an adhesive layer 14 is applied to the metal layer, which is covered by a protective layer 15. In the exemplary embodiment shown, the protective layer 15 consists of two cover strips 17 separated along the line 16. The material strip shown in FIG. 3 is attached to the closure flap at the factory, as is the case with the exemplary embodiment according to FIG. In this case, the cover strip 17 can be omitted and the carrier tape 12 is connected to the metal layer 13 via the adhesive layer 14 exposed there to the outside of the closure flap 6, in such a way that the dividing line 16 coincides approximately with the material weakening line 7. It is also possible, however, to attach the material strip according to FIG. 3 subsequently in the manner shown in FIG. 2 or only after the closure flap 6 has been closed.

In the starting position shown in FIG. 2, the film pocket is filled through the opening 5. The protective layer 10 is then removed and the closure flap 6 with the covering strip 8 and the partially adhered carrier tape 12 with the metal layer 13 and adhesive layer 14 and a cover strip 17 are folded over. The closure flap is attached to the outside of the film pocket by pressure by means of the adhesive layer 9. The shipper then tears off the document strip 8, pulls off the cover strip 17 that is still present and presses the carrier tape 12 onto the film pocket, so that it is connected to the film layer 14 as shown in FIG. 4.

As can be seen from FIG. 1, the film pocket 1 is provided on the outside with an identification number which is also indicated on the document strip 8. Furthermore, the date of the expedition and, for example, the amount deposited can be indicated on the document strip. The foil pouch also has a labeling field in which, for example, the name of the sender, the date, the name of the messenger and that of the recipient are given. In addition, a usage note, for example an account number or the like, can also be given. It should also be mentioned that FIG. 1 shows the film bag during the closing process, namely immediately after the closure flap has adhered to the outside of the film bag via the adhesive layer 9 and before the covering strip 8 has been removed and the guarantee closure has been closed.

In the exemplary embodiment according to FIGS. 5 and 6, the film pocket 1 in turn has a closure flap 6 and a slip strip 8 adjoining it via a material weakening line 7. The closure itself, in particular however, the guarantee closure 11 is also designed differently than in the exemplary embodiment according to FIGS. 1 to 4. At least the closure flap 6 or the outer area thereof is transparent. The metal layer 13 is applied to the inside of the closure flap 6, for example by vapor deposition. The adhesive layer 14 is in turn applied to this metal layer 13, which in turn is covered by the protective layer 15 which in this case is in one piece. After the film bag 1 has been filled, the protective layer 15 is pulled off, the closure flap 6 with slip strips 8 is folded over onto the outside of the film bag and adhered to the film bag by pressure using the adhesive layer 14. Then the document strip 8 is separated.

If necessary, an adhesion promoter can be arranged between the transparent carrier tape 12 or the transparent closure flap 6 and the metal layer 13 in both embodiments. If the metal layer is designed as a hologram, even minor injuries can be seen as optically perceptible irregularities.

As a modification of the embodiment shown in FIGS. 2 and 4, one part can be attached to the film pocket 1 in the manner shown in FIG. 4, in particular when the carrier tape is attached at the factory, while the other part, which is still connected to the corresponding part 17 of FIG Protective layer 15 is covered, is pressed by the user after folding the flap 6 on the outside thereof. Previously, he cut off the slip 8.

Claims (11)

Foil bag made of plastic for means of payment, valuables, documents or the like with a foldable closure flap with a guarantee closure, characterized in that the guarantee closure (11) has a metal layer (13) of a few μ thickness connected to the closure flap (6) and an adhesive layer (14 ), which is provided with a protective layer (15) covering it before use, after removing and folding the flap, the metal layer can be connected to the film pocket (1) via the adhesive layer. Foil bag made of plastic for means of payment, valuables, documents or the like with a foldable closure flap and a guarantee closure, characterized in that the guarantee closure has a metal layer of a few µ thickness and a thereon has an applied adhesive layer, which is provided with a protective layer covering it before use, and that after the protective layer has been removed, the metal layer can be connected to the film pocket via the adhesive layer and after the flap has been folded over with the latter. Foil bag according to claim 1 or 2, characterized in that the metal layer (13) is applied to a transparent carrier tape (12) and by means of the adhesive layer (14) arranged on the other side over part of its width with the closure flap (6) and with which this projecting part can be connected to the film pocket (1). Foil bag according to one of claims 1 to 3, characterized in that the protective layer (15) is divided lengthwise, one part (17) of the part of the carrier tape (12) to be connected to the closure flap (6) and the other part of that with the Foil pocket (1) is assigned to the part of the carrier tape (12) or the metal layer (13) to be connected. Foil bag according to one of claims 1 to 4, characterized in that the carrier tape (12) with the metal layer (13), the adhesive layer (14) and the protective layer (15) is designed as an endless tape, of which the required length for the guarantee closure (11 ) is separable. Foil bag according to one of claims 1 to 5, characterized in that the carrier tape (12) consists of polyester. Foil bag according to claim 1, characterized in that the closure flap (6) is transparent at least in some areas and that the metal layer (13) and the adhesive layer (14) is applied to its inside at least in the transparent area. Foil bag according to one of Claims 1 to 6 with a slip strip that can be removed after closing, characterized in that the slip strip (8) is part of the closure flap (6) and is connected to it via a material weakening line (7), and in that the carrier tape (12) is applied to the closure flap (6) such that the longitudinal division (16) of the protective layer (15) coincides approximately with the material weakening line (7). Film bag according to one of claims 1 to 6 with a document strip that can be removed after closing, characterized in that the document strip (8) is a part separated from the film bag (1) and part of the protective layer (15) on the carrier tape (12) forms. Foil bag according to one of claims 1 to 9, characterized in that the metal layer (13) is applied by vapor deposition. Foil bag according to one of claims 1 to 10, characterized in that the metal layer (13) is designed as a two- or three-dimensional hologram.

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