DE8702030U1 - Resealable packaging container - Google Patents

Description

Resealable packaging container

The invention relates to a resealable packaging container in the form of a sack or bag made of flexible material, with a double closure on one of the two ends of the sack, one of which forms a non-resealable main closure and the other a secondary closure that can be detached and resealed at will in the form of a tab band surrounding the adjacent edge of the sack.

Packaging containers of this type are used to package pourable goods that are usually taken out by the consumer in portions, so that the packaging container has a resealable design for this reason. The amount of liquid required by the consumer for the The main closure, which is to be released the first time the contents are removed but cannot be resealed, ensures that the contents are protected against unauthorized access during storage and transport of the packaging container. After the main closure has been released, the adjacent end of the packaging container as The opening for removing the contents is provided, but can then be closed and opened again as required using the secondary closure in the form of the tab band surrounding the edge of the bag.

In a known packaging container of the type specified, the main closure is formed by a tearable sewing seam that connects the two walls of the packaging container close to the adjacent container edge. With such a sewing closure, the perforation made by the sewing needle in the container walls reduces the tightness of the packaging, which is particularly undesirable if the packaging is intended to make the contents impermeable to water vapor, aroma and/or fat. If a tear strip is provided to make it easier to open the sewing closure, which is placed on the outside of a container wall and is also sewn to it by the sewing seam, the external appearance of the packaging is negatively influenced, since such tear strips are perceived as disturbing, particularly if the outside of the packaging container is provided with a printed pattern and a high-gloss coating, for example.

The invention is based on the object of creating a resealable packaging container of the type specified , which, while being easy to manufacture,

Tightness is not impaired by the attachment of the main closure and at the same time a tear strip or similar packaging parts resting on the outside of the container wall are avoided.

This object is achieved according to the invention in that the packaging container comprises an outer bag and an inner bag that is partially connected to the inside of the outer bag and its main closure is supported by a separate end closure seam of the inner bag that is kept free from a material connection with the outer bag.

half of the secondary closure. In the packaging container designed in this way, the inner bag can be easily inserted into the outer bag of the packaging container using mechanical equipment in a fully automatic operation and can already have its end closure seam forming the main closure. Since this end closure seam is formed separately from the material of the outer bag and does not form any material connection with it, the The tightness of the packaging is not affected in any way by the attachment of the main closure, as well as thanks to the end closure seam held inside the outer bag below the second closure, external packaging parts in connection with the main

Closure is avoided. The final closure seam of the

Depending on the material used, the inner bag can be made of an adhesive or welded or sealed seam. Paper, plastic films and or suitable laminates, which may also include metal foils, can be considered as bag material.

Usually, the double closure is provided at the upper end edge of the packaging in use and is by the manufacturer of the empty packaging completely attached to the packaging container. In the filling plant, the packaging container is then filled from the open bottom and using the means of the filling plant at its own discretion, e.g. by attaching a rider band des, locked.

Further features and advantages of the invention emerge from the claims and the following description in conjunction with the drawing, in which an embodiment of the subject matter of the invention is shown schematically.

-4-■illustrative. In the drawing show:

Fig. 1 is a front view of a resealable

Packaging container in the form of a sack or bag made of flexible material, the lower end of the packaging container being omitted

is and

Fig. 2 is a section along the line ΛΛ-Λι of Fig. 1.

The packaging container shown in the drawing is in the form of a flat sack or bag. However, it can also be designed as a side-gusseted sack or bag. The packaging container comprises an outer sack 1 and an inner sack 2, which in the flat sack form shown each have two sack walls that are flat and opposite one another when the sack is empty.

In the example shown, the outer bag 1 is double-layered and comprises, for example, two material layers 3 and 4 made of paper, which are connected in a manner known per se at their upper end (as well as at their lower end, not shown) by an adhesive bond (λ are completely connected to each other.

Q _The inner bag 2 is single-layered in the example shown and is made, for example, from a thermoplastic film. The inner bag 2 is closed at its upper end by a weld seam 6, which forms the main closure of the packaging. The end closure seam 6 is attached separately to the inner bag 2 and has no material connection with the outer bag 1. The main closure of the packaging container formed by the end closure seam 6 protects the contents during storage and

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during transport from access.

Furthermore, the packaging container is provided with a secondary closure 7, which can be closed and reclosed at any time, so that after loosening the main closure, the contents can be removed from the packaging container in portions and the packaging container can be closed again after each removal of the contents using the secondary closure.

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The secondary closure 7 is formed by means of a rider band 8, which in the example shown has two closure bands 9 and 10 with locking profile strips that can be brought into mutual locking engagement and then released again, forming a sliding closure. Such sliding closures are widely known per se, especially in connection with small-format bags or packaging, so that a more detailed illustration and description is unnecessary; only the sliding slide, which is usually used to release and restore the locking engagement of the locking profile strips, is shown at 11 with its pivoting handle 12. The displacement path of the sliding slide 11 is limited in the end areas of the closure bands 9 and 10 that protrude beyond the bag edges 13 and 14 in a manner not shown in more detail.

In the example shown, the fastening tape 10 of the rider tape 8 is made of two parts and comprises an outer fastening strip 15 and an inner profile strip 16. Just like the fastening tape 9, the two material strips 15 and 16 are made of thermoplastic material and are joined together by a weld seam 18.

In Fig. 2, the secondary closure 7 is shown in the open position. It is understood that for closing, the profile strips of the profile strip 16 can be brought into engagement with the profile strips of the closure band 9 in a manner known per se in order to form a closed tab band 10.

It is also understood that the rider strap 8 can also be provided with a zipper or a Velcro fastener instead of a slide fastener.

C In any case, the two locking strips 9 and

10 of the rider band 8 are connected at their lower edges to the upper edge of the outer layer 3 of the two opposing sack walls of the outer sack 1 by an adhesive seam 17, e.g. by means of a hot melt application. As can be seen from the drawing, the rider band 8 ends with its lower, sack-side edge above the end closure seam 6 of the inner sack 2 forming the main closure, whereby the

Adhesive seams 17 are located in the area between the upper end edge of the outer bag 1 and the end closure seam 6. This ensures that the closure seam can be attached without being obstructed by the inner bag 2 with its end/closure seam 6.

bands 9 and 10 of the rider band 8 on the outer bag 1.

At a distance from its end closure seam 6, the inner bag 2 is secured all around by a connecting seam 20 on the inside of the inner material layer 4 of the outer bag 1 ^3C . The connecting seam 20 is expediently designed as an adhesive seam, as is a further connecting seam 21 running all around at the same height as the connecting seam 20, which in turn connects the two material layers 3 and 1 of the outer bag 1 to one another.

The area between the connecting seam 20 and the end closure seam 6 of the inner bag 2 is kept free from a material connection with the outer bag 1. With the arrangement shown, when the second closure 7 is open, as shown in Fig. 2, the two bag walls of the outer bag 1 can be spread apart so far that the consumer can easily open the closed inner bag 2, for example by cutting or cutting off the upper edge area that includes the end closure seam 6. The connecting seam 20 ensures that the force is transmitted to the material layers 3 and 4 of the outer bag 1.

The distance between the connecting seams 20 and 21 as well as the end closure seam 6 of the inner bag 2 from the upper end edge 19 of the outer bag 1 are such that

on the one hand, the inner bag 2 can be opened easily, but on the other hand, the edge parts of the inner bag 2, which are thus freely movable, above the connecting seam 20 do not hinder the removal of contents and the closing of the slide fastener 7. The distance between the connecting seams 19 and 20 from the upper edge 18 of the outer bag 1 is ('; dependent on the width b of the packaging container

and is preferably about 1/10 of this width b.

Claims (7)

Bishop and Klein, .. _ Dipl.-Ing. Dr. lur. V. Busse GmbH & Co. Dipl.-Ing. Dietrich Busse Dipl.-Ing. Egon Bünemann Rahestr. 47 4540 Lenaerich iW D-4500 Osnabrück GroBtiandelsrina &bgr; - PO Box 1226 Telephone: 05 41-58 SO 81/82 Telegrams: patgewar Osnabrück Telecopier: OS 41-58 81 64 10.02.1987 L/Li Expectations: 1. Resealable packaging container in the form of a sack or bag made of flexible material, with a double closure at one of the two ends of the sack, one of which has a non-resealable main closure and the other forms a secondary closure that can be opened and closed again at will in the form of a tab band surrounding the adjacent bag edge, characterized in that the packaging container ¹ comprises an outer bag (1) and a partially connected to its inner side connected inner bag (2) and its main closure is formed by a separate end closure seam (6) of the inner bag (2) below the secondary closure (7), which is kept free from a material connection with the outer bag (1). 2. Packaging container according to claim 1, characterized in that the inner bag (2) is closed all around by a connecting seam in its end region facing the secondary closure (7) at a distance from its end closure seam (6). (20) is fixed to the inside of the outer bag (1) and the area between the connecting seam (20) and the closing seam (6) is kept free from a material connection with the outer bag (1). * ·
t m -2- 3. Packaging container according to claim 2, characterized in that the connecting seam (20) is arranged at a height distance from the adjacent end edge (19) of the outer bag (1) which is approximately 1/10 of the width (b) of the packaging container. 5 4. Packaging container according to claim 2 or 3, characterized in that in an outer bag (1) comprising several material layers (3, 4), the individual material layers (3, 4) are connected at the level of the connecting seam (20) of the inner sack (2) with the outer bag (1) are in turn connected to one ^another . 5. Packaging container according to one of claims 1 to 4, characterized in that the end closure seam (6) of the inner bag (2) is below the level of the adjacent End edge (19) of the outer bag (1). 6. Packaging container according to one of claims 1 to 5, characterized in that the inner bag (2) consists of weldable or sealable material and its End closure seam (6) is formed by a weld or sealing seam. 7. Packaging container according to one of claims 1 to 6, characterized in that the rider band (8) is Secondary closure (7) comprises two strip-shaped closure bands (9,1-0) which can be brought into mutual closure engagement and then released again above the level of the adjacent end edge (19) of the outer bag.