Tubular bag packaging for table-shaped food products

Abstract

Tubular bag packaging for tablet-shaped food products, in particular chocolate bars, wherein the tubular bag packaging (22) extends in a longitudinal direction and in a transverse direction and consists of a film blank (1, 1') which is placed around the tablet-shaped food product (17), wherein the film blank (1, 1') has on one side a frame-shaped strip (2) on which a cold adhesive is applied, and the frame-shaped strip (2) comprises two transverse strips (4, 5) and two longitudinal strips (6, 7) and sealing seams are produced on these for closing the tubular bag packaging (22) by means of the cold adhesive, characterized in that, in order to form a longitudinal sealing seam (23), a first longitudinal strip (6) is wider than a second longitudinal strip (7), so that the second longitudinal strip (7) comes into contact with the entire area of ​​a surface of the first longitudinal strip (6).

Description

[0001] The invention relates to a tubular bag packaging for table-shaped food products of the type specified in the preamble of claim 1.

[0002] From DE 10 2005 013 585 A1, a resealable film packaging with a longitudinal seal and two transverse seals is known. At least the longitudinal seal is spaced apart from the associated longitudinal edges by forming two longitudinal edge strips of different widths, folded one over the other and onto the outside of the packaging. A re-adhesive, in particular cold-applied, adhesive is applied to the portion of the wider longitudinal edge strip that extends beyond the narrower one. This adhesive can be applied to a release surface formed on the outside of the packaging to close it.

[0003] DE 21 2009 000 003 U1 describes a packaging made of a layered material. The packaging has a side flap extending longitudinally and is provided with transverse closures arranged transversely to the side flap at each end of the packaging. These closures comprise at least two layers of material, with a perforation provided in at least one section of a transverse closure substantially parallel to, or at an angle of up to 60° to, the side flap. The perforation penetrates one layer of material, being located near the side flap and extending towards the free edge of the packaging.

[0004] From EP 2 426 065 A1, a tubular pouch packaging for block-shaped foodstuffs is known, extending in a longitudinal and a transverse direction. The tubular pouch packaging comprises a film with longitudinally extending edges, wherein the film has a sealing section extending along its first longitudinal edge and a flap section adjacent to its second longitudinal edge with a further sealing section extending along the second longitudinal edge. The film is closed tubularly at the sealing sections, forming a continuous, longitudinally extending back seam designed as a fold-over seam. The flap section is provided with at least one linear tear-off slit in the region of its end edge as a tear aid. The tear-off slit originates from the end edge and runs at least approximately parallel to the longitudinal direction.

[0005] The present invention is based on the objective of creating a tubular bag packaging of the type mentioned in the preamble of claim 1, in which the formation of a reliable longitudinal seal is optimized.

[0006] This problem is solved according to the invention by a tubular bag packaging with the features of claim 1.

[0007] The design of the longitudinal strips enables the creation of a longitudinal seal based on the hammer-and-anvil principle. This means that the narrower second longitudinal strip is guaranteed to make full contact with the area provided by the first longitudinal strip. The effective adhesive area is determined solely by the cold adhesive of the narrow second longitudinal strip (the hammer). Therefore, different sheet thicknesses and unequal settings on the packaging machines have no influence on the width of the seal. Such a tolerance-free longitudinal seal also contributes to decoupling the packaging system from the contents.

[0008] According to an advantageous embodiment of the invention, the width of the first longitudinal strip is approximately twice that of the second longitudinal strip. This width ratio has the advantage of compensating for slightly larger product dimensions and / or machine tolerances. It is also advantageous that the transverse strips are symmetrical with respect to a transverse axis of the film blank. This ensures that the same sealing forces are generated in both transverse sealing seams. Furthermore, it is advantageous for the transverse strips to have serrations pointing towards the transverse axis. Such a serration profile reduces the necessary release forces when unwinding the film from the roll and ensures smoother film operation on the packaging machine. Simultaneously, the sealing area per packaging unit can be reduced, leading to fewer malfunctions and less wear on the rollers in the packaging machine.Reducing the sealing area also reduces the consumption of cold sealing compound, thus saving costs.

[0009] Regarding the design of the transverse strips with serrations, it is advantageous for the width at a serration tip to be approximately half again as wide as at a serration trough. To reduce the required tensile stress in the transverse seal seams, it is advisable to provide predetermined breaking points in both transverse seal seams. This is achieved by reducing the width of the transverse strip, and consequently the cold adhesive, at a predetermined point. Furthermore, such a reduced-width point determines the opening path in the transverse seal seams. It is also considered advantageous to provide areas without cold adhesive at the ends of the first longitudinal strip. This reduces the breakaway torque and creates a tear contour in the longitudinal seal seam, thereby reducing the force required to open the longitudinal seal.

[0010] In a further embodiment of the invention, the lateral distance of the first longitudinal strip to one longitudinal edge of the film blank is greater than the distance of the second longitudinal strip to the other longitudinal edge. This greater distance between the first longitudinal strip and the longitudinal edge of the film blank allows a flap to be formed, which facilitates handling the tubular bag packaging when opening the longitudinal seam by pulling on the flap. Another measure for reducing the breakaway torque in the longitudinal seal is to provide at least one groove running lengthwise in the cold adhesive application of the longitudinal strip.

[0011] According to a preferred embodiment, additional areas adjacent to the first longitudinal stripe are provided with a cold adhesive. This additional cold adhesive creates a resealable profile that allows the packaging to be closed after partial removal of the contents. A preferred embodiment of these additional areas consists of supplementary strips extending parallel to each other from the first longitudinal stripe between the transverse stripes. Grooves can be incorporated into the cold adhesive of these supplementary strips to reduce the breakaway torque when the resealable closure is reopened. Furthermore, it is advantageous to have at least one marking or pictogram on the flap indicating to the user the appropriate point for operating the opening mechanism.To prevent the outer edges of the foil cutout from spreading apart in the area with reduced width of the transverse strip, it is advantageous to provide an adhesive point on the outer edge of the foil cutout in this area.

[0012] Exemplary embodiments of the invention are explained in more detail below with reference to the drawing. The drawing shows:

[0013] Fig. 1. A top view of a foil blank used as tubular bag packaging, especially for table-shaped food or beverages,

[0014] Fig. 2 a variant of the foil cutting according to Fig. 1,

[0015] Fig. 3. A foil cutout with an enlarged flap,

[0016] Fig. 4 a variant of the foil cutting according to Fig. 3 with additional adhesive strips,

[0017] Fig. 5 a schematic representation of the cross-section through a foil cut of the Fig. 3 when enclosing a table-shaped food product in a tube-like manner,

[0018] Fig. 6 the arrangement according Fig. 5 with sealed and folded longitudinal seam formed by longitudinal strips of a cold adhesive,

[0019] Fig. 7 an enlarged representation of a section of the foil cut according to Fig. 4 in the foil strip.

[0020] In Fig. 1 is a rectangular piece of foil 1 shown, which consists of a plastic material suitable for tubular bag packaging of food and in this view has a frame-shaped strip 2 exhibits, with the stripes 2 of the foil cutting 1 A cold adhesive is applied. Such a cold adhesive is, for example, an acrylic-based material. The foil cut 1The film is unwound from a roll to form the tubular bag packaging, with the direction of movement shown in the arrow. 3 is. The frame-shaped strip 2 The cold adhesive includes transverse stripes 4 and 5 as well as two longitudinal stripes 6 and 7 The horizontal stripes 4 , 5 are relative to a transverse axis 8 Symmetrically arranged and identically executed. The shape of the transverse stripes. 4 , 5 is with spikes 9 Designed and dimensioned to ensure sufficient width for a secure transverse seal. The serrated shape ensures that the holding forces generated by the cold adhesive vary at different points during unwinding, thus facilitating the unwinding process. The transverse stripes 4 , 5 In the exemplary embodiment, they are designed such that their width is at the tip of a tooth. 9'approximately half as much again as in a jagged valley 9'' .

[0021] The longitudinal stripes 6 and 7 are designed as straight strips of cold adhesive, with the first longitudinal strip 6 is significantly wider than the second longitudinal stripe 7 The width of the second longitudinal stripe 7 is dimensioned in such a way as to ensure a reliably closed longitudinal sealing seam, with the width of the first longitudinal strip 6 This takes into account the manufacturing tolerances when sealing the foil blank after filling. The width of the second longitudinal strip 7 This therefore certainly applies completely to the first longitudinal stripe 6 Available area. The longitudinal stripes 6 and 7 They thus form a longitudinal sealing seam according to the "hammer-anvil principle", whereby the first longitudinal strip 6as an anvil and the second longitudinal strip 7 act like a hammer. As if from Fig. As can also be seen, the first longitudinal stripe 6 a smaller distance to a longitudinal edge 10 of the foil cutting 1 on as the second longitudinal stripe 7 to a long edge 15 , so that between the second longitudinal stripe 7 and the long edge 15 a tab 11 is formed.

[0022] On the outer edges of the transverse stripes 4 and 5 is at a predetermined location 12 the width of the strip 4 , 5 of the cold adhesive 2 reduced. The arrangement of the positions 12 in the cross stripes 4 , 5The length of the transverse stripes is asymmetrical, taking into account that in this example of tubular bag packaging, the longitudinal seal is not centered. Since at this point 12 Since the necessary tensile stress for opening the package is reduced, this determines the opening path in the transverse seal seams when the package is opened by bending or pulling. It is therefore advisable to... 12 To be positioned below the longitudinal seal seam as a predetermined breaking point. A further tear contour is created by also placing points at the ends of the first longitudinal strip. 13 are designed without the application of cold adhesive. This reduces the breakaway torque and consequently also the force required to open the longitudinal seal by pulling on the tab. 11 reduced.

[0023] The Fig. Figure 2 shows one variant of the foil cutting process. 1 , who differs from that of the Fig. 1 differs in that the frame-shaped strip 2 of the cold adhesive onto the foil cutout 1 is shifted slightly to the right, so that the distance of the second longitudinal stripe 7 to the long edge 15 is smaller, whereas the distance of the first longitudinal stripe 6 to the long edge 10 is significantly larger and therefore the tab 11 along the first longitudinal strip 6 is formed. Furthermore, the characteristics of the Fig. 2 with those of Fig. 1. The reference symbols are the same for identical parts.

[0024] In Fig. 3 is a foil cutout 1' with a tab 14 shown, which is larger than the tab 11 in Fig. 2 is, i.e., the foil cut 1 is larger, so that the distance between a longitudinal edge 10' and the first longitudinal stripe 6larger and thus the tab 14 It's wider. This wider flap 14 This makes opening the packaging easier, as this tab is easier to grasp and handle more securely with the active hand. Furthermore, the film cut is... 1' same as that of Fig. 2 and so the reference symbols for identical parts also correspond to those of the Fig. 1 and Fig. 2 agree.

[0025] In Fig. 4 is a foil cutout 1' shown, with the frame-shaped strip being the only feature. 2 of the cold adhesive additional strips 16 The cold adhesive is provided. In the illustrated embodiment, the additional strips 16 from the first longitudinal stripe 6 out and extend parallel to each other, up to about the level of the first spike 9 the cross stripe 4 , 5 . Through these additional strips 16A resealable profile is created that improves the resealing of the tubular bag packaging after partial removal of the contents. The additional cold-seal compound can also be applied to surfaces of other shapes; however, it is important that these are adjacent to the first longitudinal stripe. 6 are.

[0026] The Fig. Figure 5 schematically shows a cross-section through a foil cut-out 1' according to Fig. 3 and a table-shaped food product 17 or a chocolate bar during the packaging process. During the packaging process, the food product 17 from a middle section 18 of the foil cutting 1' covered, with lateral sections 19 , 20 protrude (shown with dashed lines). These lateral sections 19 , 20 will be shown according to the arrows 21 over the top of the food product 17beaten to create a tubular bag packaging 22 to form the longitudinal stripes. 6 and 7 brought into mutual alignment and with pressure according to arrows 24 applied, resulting in a closed seal seam 23 arises. Since during the in Fig. The longitudinal seal seam of the tubular bag packaging shown in the 5 shown images 23 If the centered position is also included in this case, then the ones in the Fig. 1 to Fig. 4 shown locations 12 to be positioned in the middle of the horizontal stripes.

[0027] After sealing the tubular bag packaging 22 The foil sections where the seal seam is 23 is formed according to the arrow 25 for tubular bag packaging 22 folded over so that these film sections lie flat on the tubular bag packaging 22 lie, as is the case in Fig. Figure 6 shows that the reference symbols for equal parts correspond to those of the Fig. 5 match.

[0028] In the Fig. Figure 7 shows a section of a foil roll, which successively contains the foil cutouts. 1' and 1* contains, where all foil cutouts of this foil roll are identical. As described above, the foil cutout 1' a frame-shaped strip 2 provided with cold adhesive, whereby in Fig. 7 a part of the transverse stripes 4 , 5 and the first longitudinal stripe 6 can be seen. The spots are also visible. 12 and 13 with reduced cold adhesive application. Furthermore, in Fig. 7 showed that in the cold adhesive layer of the first longitudinal strip 6 longitudinal grooves 27 are arranged in such a way that the packaging can be opened more easily by pulling on the tab. 14 This is intended to be achieved through the direction of the grooves. 27A secure seal is ensured. Furthermore, the additional strips can also be inserted into the cold adhesive layer. 16 grooves 26 This is intended to ensure that the side edges of the foil cutout 1 the finished tubular bag packaging also in the area of ​​the places 12 with reduced cold adhesive application, they can lie securely against each other at these points. 12 Adhesive dots 29 These flaps should be provided, but they should not impede opening the tubular bag by folding or pulling. To indicate the location of the designated flap to the user who wants to open the tubular bag by pulling it open... 14 To make this clear, suitable markings are needed. 28 , for example pictograms are provided. QUOTES INCLUDED IN THE DESCRIPTION

[0029] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0030] DE 102005013585 A1

[0002] DE 212009000003 U1

[0003] EP 2426065 A1

[0004]

Claims

[1] Tubular bag packaging for tablet-shaped food products, in particular chocolate bars, wherein the tubular bag packaging ( 22 ) extends in a longitudinal direction and in a transverse direction and consists of a foil cutout ( 1 , 1' ) consists of the table-shaped food product ( 17 ) is laid around, with the foil cutout ( 1 , 1' ) on one side a frame-shaped strip ( 2 ) has a cold adhesive applied to it, and the frame-shaped strip ( 2 ) two horizontal stripes ( 4 , 5 ) and two longitudinal stripes ( 6 , 7 ) includes and attaches to these for sealing the tubular bag packaging ( 22 ) sealing seams are created using cold adhesive, characterized by that to form a longitudinal sealing seam ( 23 ) a first longitudinal stripe ( 6 ) is wider than a second longitudinal strip ( 7), so that the second longitudinal stripe ( 7 ) completely within the area of ​​a surface of the first longitudinal strip ( 6 ) to the facility. [2] Tubular bag packaging according to claim 1, characterized by that the width of the first longitudinal stripe ( 6 ) is approximately twice the width of the second longitudinal stripe ( 7 ). [3] Tubular bag packaging according to claim 1, characterized by that the cross stripes ( 4 , 5 ) relative to a transverse axis ( 8 ) of the foil cut ( 1 , 1' ) are symmetrically formed. [4] Tubular bag packaging according to claim 3, characterized by that the cross stripes ( 4 , 5 ) to the transverse axis ( 8 ) pointed teeth ( 9 exhibit. [5] Tubular bag packaging according to claim 4, characterized by that the transverse stripe ( 4 , 5 ) at the tip of a spike ( 9') has a width that is about half again as large as that in a jagged valley ( 9'' ). [6] Tubular bag packaging according to any one of claims 1 to 5, characterized by that at a given location ( 12 ) of the transverse stripe ( 4 , 5 ) this, and therefore also the cold adhesive, has a reduced width. [7] Tubular bag packaging according to any one of claims 1 to 6, characterized by that at the ends of the first longitudinal stripe ( 6 ) Place ( 13 ) are designed without cold adhesive application. [8] Tubular bag packaging according to any one of claims 1 to 7, characterized by that the lateral distance of the first longitudinal stripe ( 6 ) to a longitudinal edge ( 10' ) of the foil cut ( 1' ) is greater than the distance of the second longitudinal stripe ( 7 ) to the other long edge ( 15 ). [9] Tubular bag packaging according to claim 8, characterized bythat the distance between the first longitudinal stripe ( 6 ) and the long edge ( 10' ) a tab ( 11 , 14 ) forms. [10] Tubular bag packaging according to any one of claims 1 to 9, characterized by that in the cold adhesive application of the first longitudinal strip ( 6 ) running in its longitudinal direction at least one groove ( 27 ) is planned. [11] Tubular bag packaging according to any one of claims 1 to 10, characterized by that adjacent to the first longitudinal strip ( 6 ) additional surfaces are coated with a cold adhesive. [12] Tubular bag packaging according to claim 11, characterized by that these additional areas are created by additional strips ( 16 ) are formed, extending from the first longitudinal stripe ( 6 ) parallel to each other between the transverse stripes ( 4 , 5 extend. [13] Tubular bag packaging according to claim 12, characterized bythat the additional strip in the cold adhesive application ( 16 ) grooves ( 26 are arranged. [14] Tubular bag packaging according to claim 9, characterized by that on the tab ( 11 , 14 ) at least one marker ( 28 ), for example, a pictogram is provided. [15] Tubular bag packaging according to claim 6, characterized by that in the area of ​​the position ( 12 ) with reduced width of the transverse stripe ( 4 , 5 ) on the outer edge of the foil cutout ( 1' ) an adhesive dot ( 29 ) is planned.

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