PACKAGING

Abstract

An insert for a flow wrapped packaging assembly has a bottom wall (18) and a peripheral wall (20) extending from said bottom wall to define an interior volume (21) for containing product (14). The insert has a tongue (20) at a top end of the peripheral wall which is movable between a closed position in which it at least partially closes the interior volume at the top end of the insert and an open position in which it does not impede access to the interior volume. The insert (12) can be top-filled when upright with the tongue open and then moved to a horizontal orientation for flow wrapping using a HFFS process with the tongue closed to prevent the contents spilling out. The insert is particularly suitable for enabling a plurality of disc-shape products, such as beverage pads, to be flow wrapped using HFFS processes.

Claims

1. An insert for a flow wrapped packaging assembly comprising a bottom wall and a peripheral wall extending from said bottom wall to define with the bottom wall an interior volume for containing product, characterised in that said insert comprises at least one tongue at a top end of the peripheral wall distal from the bottom wall, said at least one tongue being movable between at least one closed position in which it at least partially closes the interior volume at the top end of the insert and at least one open position in which it does not impede access to the interior volume through the open top end.

2. An insert according to claim 1, wherein said peripheral wall comprises opposed front and rear wall portions and opposed side wall portions extending between said front and rear wall portions.

3. An insert according to claim 2, wherein the front and rear wall portions are substantially planar and said side wall portions are curved.

4. An insert according to claim 2, wherein said bottom wall is sloped with respect to the plane of the rear wall portion of said peripheral wall.

5. An insert according to claim 2, wherein said at least one tongue is connected to the distal upper end of the rear wall portion by a hinge or fold line.

6. An insert according to claim 5, wherein a dispensing aperture is defined in said front wall portion.

7. An insert as according to claim 6, wherein the dispensing aperture is open at the distal upper end of the front wall portion and extends over at least 50%, or at least 60%, or at least 70% or at least 80% of the length of the front wall portion from the distal upper end towards the bottom end.

8. An insert according to claim 6, wherein the dispensing aperture extends across substantially the whole width of the front wall portion.

9. An insert according to claim 1, wherein said tongue has a shape selected from the group consisting of square, rectangular, semi-circular, oblong, triangular, trapezium, oval, semi-oval, boustrophedonic, butterfly-wing shaped, bone shaped, half-bone shaped, and/or any combination thereof.

10. An insert according to claim 1, wherein said insert is constructed from a single blank of foldable material, such as cardboard, cartonboard and the like.

11. An insert according to claim 10, wherein the blank comprises interlocking tab portions configured to hold sections of the blank in their erected configuration such that the blank is erected into the insert without the use of adhesive.

12. An insert according to claim 1, wherein the insert is made from a corrugated material

13. A flow wrapped packaging assembly comprising an insert according to claim 1 containing product, the tongue of the insert being in the closed position, the insert being encased in a wrapper made from flexible film, the wrapper being closed by means of a longitudinal seal and a transverse seals at either end of the insert.

14. A flow wrapped packaging assembly according to claim 13, wherein the wrapper is formed using a HFFS processes.

15. A packaging assembly according to claim 13, wherein the product comprises at least one stack of beverage pads inside the insert.

16. A packaging assembly according to claim 15, wherein the product comprises two stacks of beverage pads arranged side by side inside the insert.

17. A packaging assembly according to claim 16, wherein the beverage pads are disc-shaped and the peripheral wall of the insert comprises opposed front and rear wall portions and opposed side wall portions extending between said front and rear wall portions, and wherein the front and rear wall portions of the insert are substantially planar and said side wall portions are curved, each curved side wall portion extending about an outer peripheral region of a respective one of the stacks.

18. A packaging assembly according to claim 13, wherein the wrapper comprises a degassing valve, which may be an external one-way sticker valve.

19. A packaging assembly according to claim 13, wherein at least one of seals is a peelable seal and includes a non-sealed tab region which can be grasped to initiate opening of the seal.

20. A process for the production of a flow wrapped packaging assembly according to claim 13, the process comprising the steps of: a. filling said insert with product whilst the tongue is in an open position; b. subsequently moving the tongue to the closed position; c. forming the wrapper about the filled insert with the insert in a generally horizontal orientation using a HFFS process.

21. A process according to claim 20, wherein step a. is carried out with the insert in an upright, generally vertical orientation, the process further comprising carrying out step b. prior to step c.

22. A process according to claim 20, wherein step c. comprises conveying the filled insert in a horizontal orientation through a wrapping area of a HFFS apparatus in which a packaging film is formed into a tube about the insert, the process further comprising holding the tongue in its closed position whilst the insert is conveyed in a horizontal orientation towards said wrapping area.

23. A process according to claim 20, wherein the insert is formed from a single blank of foldable material and the process further comprising erecting the blank to form the insert prior to step a.

24. A process according to claim 22, wherein the blank comprises interlocking tab portions configured to hold sections of the blank in their assembled conditions; the process further comprising engaging the interlocking tap portions to hold the blank in its erected configuration.

25. A HFFS flow wrapped package comprising the insert according to claim 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0049] In order that the invention may be more clearly understood, embodiments thereof will now be described, by way of example only, with reference to the accompanying drawings of which:

[0050] FIG. 1 is a perspective view of an insert for a flow wrapped package according to an aspect of the invention, showing the insert filled with two stacks of beverage pads and with a movable tongue in an open position;

[0051] FIG. 2 is a front view of a packaging assembly according to an aspect of the invention comprising the filled insert of FIG. 1 encased in a flexible wrapper formed using a HFFS process;

[0052] FIG. 3 is a view from the rear of the packaging assembly of FIG. 2;

[0053] FIG. 4 is a perspective, schematic drawing illustrating a typical HFFS apparatus for producing the packaging assembly of FIGS. 2 and 3;

[0054] FIG. 5 is a plan view of a blank of foldable material for forming the insert of FIG. 1;

[0055] FIGS. 6 to 9 are a series of perspective views illustrating alternative embodiments of the insert of FIG. 1, showing the insert empty and with the movable tongue in a closed position; and

[0056] FIG. 10 is a view of part of the flow wrapped packaging assembly of FIG. 2, illustrating a degassing valve applied to the wrapper.

[0057] Embodiments of a packaging assembly 10 in accordance with an aspect of the invention have an insert 12 which is configured to hold a number of products 14 and which, after filling, is enclosed in an outer wrapper 16 using a HFFS process. The packaging assembly 10 according to the embodiments described herein is particularly suitable for packaging disc-shaped (e.g. round or circular in plan) beverage pads 14 of the type comprising a rigid shell closed at an upper end by a filter material. However, the invention in its various aspects can be adapted to package beverage pads of a variety of types and shapes and indeed to package a variety of other products.

[0058] The insert 12 has a bottom wall 18 and a peripheral wall 20 which extends upwardly about the bottom wall. The bottom wall 18 and the peripheral wall 20 together define an internal volume 21 for receiving the beverage pads 14. The insert 12 has a tongue (alternatively called a tab) 22 movably attached to an upper end 24 of the peripheral wall 18 distal from the peripheral wall. The tongue 22 is attached to the distal end of the peripheral wall by means of a hinge or fold line 26 and can be moved between a closed position as illustrated in FIGS. 6 to 9 and an open position as illustrated in FIG. 1. In the closed position, the tongue extends across the insert opposite to the bottom wall so as to at least partially close the insert at the upper end of the internal volume. The tongue 22 may extend substantially parallel to the bottom wall in the closed position but this is not essential. In the open position, the tongue does not extend across the insert so that it does not impede access to the internal volume 21. The tongue 22 may extend generally co-planar with the portion of the peripheral wall to which it is attached in the open position so as to form an extension of the peripheral wall. However, the tongue 22 could be folded outwardly at least a little to ensure clear access to the interior volume. The tongue in the present embodiment is smaller than the cross-sectional area enclosed by the peripheral wall at its upper end distal from the bottom wall so that the tongue only partially closes the insert. That is to say that a major surface area of the tongue is smaller than the cross-sectional area enclosed by the peripheral wall at its upper end distal from the bottom wall.

[0059] The insert 12 forms a container for holding a plurality of beverage pads 14 in a desired configuration and about which a packaging film can be flow wrapped. In the present embodiment, the beverage pads are arranged in two stacks 28 arranged side-by-side. The insert 12 is configured so that the peripheral wall conforms closely to the outer profile to the adjacent stacks in order to minimise the free volume within the insert when it is full. To this end, the peripheral wall 20 has a substantially planar rear wall portion 30 and an opposing substantially planar front wall portion 32. The front and rear wall portions are joined by curved side wall portions 34, 36 which each closely follow the outer peripheral shape of a respective one of the stacks of disc-shaped beverage pads. The stacks 28 each rest on the bottom wall when the insert is upright as shown in FIG. 1, such that stacks are aligned generally vertically with a longitudinal axis of each stack extending generally perpendicular to the bottom wall 18. However, in an embodiment, the bottom wall 18 is arranged to slope downwardly towards the rear wall portion slightly (as considered when the insert is in an upright position). This encourages the stacks of beverage pads to fall backwards on to the rear wall portion when conveyed and reduces the risk of the pads falling out of the insert.

[0060] It will be appreciated that the shape of the insert can be adapted depending on the shape and arrangement of the products 14 but will generally be configured to minimise the free space inside the insert when filled. For example, the insert could be adapted to have a generally tubular shape for holding a single stack of disc-shaped beverage pads 14.

[0061] The insert defines a dispensing aperture 38 in the front wall portion 32. This provides easy access to the beverage pads in the insert so that after opening the packaging assembly 12 and removing the insert from the wrapper 16, a user is able to select and remove individual pads 14, either through the top of the insert or out through the dispensing aperture. The dispensing aperture 38 is open at the upper end of the front wall portion 32 so that the dispensing aperture is contiguous with the open upper end of the insert/internal volume and extends downwardly for 50% or more of the length of the front wall portion. The dispensing aperture could extend over 60% or more, or over 70% or more, or over 80% or more of the length of the front wall portion. The dispensing aperture 38 extends substantially over the full width of the planar front wall portion 32. The dispensing aperture occupies a significant proportion of the surface area of the front wall portion and could occupy over 50%, or over 60%, or over 70%, or over 80% of the surface area of the front wall portion. The dispensing aperture 38 is made as large as possible whilst ensuring the beverage pads are retained in the insert prior to being dispensed. To this end, the curved side wall regions of the insert extend beyond the widest part of the two stacks of beverage pads as measured in the transverse direction of the insert (e.g. perpendicular to a longitudinal axis X of the insert/packaging assembly). The side wall portions 34, 36 extend beyond a midline of the beverage pads at least partially around a forward portion of the pads. The provision of a large dispensing aperture 38 not only provides for easy access to the beverage pads but also reduces the amount of material used in the insert.

[0062] Typically, the insert 12 is filled whilst in an upright, generally vertical orientation with the tongue in its open position as shown in FIG. 1. This is advantageous as it enables top filling of the insert 12 making use of gravity to feed the pads 14 into the insert from above. After filling, the tongue 22 is moved to the closed position, extending over the uppermost products in each stack. When the tongue is closed, it is operative to prevent the pads 14 from spilling out of the insert when in a horizontal orientation for flow wrapping. The tongue can be moved to the closed position whilst the insert is still upright or may be moved as the insert 12 is tilted from a vertical orientation into a horizontal orientation or even once the insert has reached the horizontal.

[0063] Once the insert 12 has been filled and with the tongue 20 moved to the closed position, it is flow wrapped using a largely conventional HFFS flow wrap process to fully enclose the insert and beverage pads 14 in the wrapper 16.

[0064] HFFS processes for flow wrapping are well known in the art and will not be described in detail. However, briefly with reference to FIG. 4 which shows a typical HFFS flow wrapping arrangement, the filled insert 12 is conveyed in a horizontal orientation towards and through a wrapping area 40. The insert 12 is expected to be positioned so that it lies on the rear wall portion 30 of the peripheral wall with the bottom wall 18 at the leading or trailing end with reference to the machine direction M. A substantially continuous length of flexible packaging film 42 is drawn from a roll 44 down over a forming box 45 which guides the film into a tubular shape surrounding the filled insert 12. Opposite longitudinal edge regions of the film are bonded together to form a longitudinal seal 46. In the present embodiment, the longitudinal seal is a fin seal 46 in which the longitudinal edge regions of the film are bonded together inner face to inner face by a pair of fin seal rollers 48. In the completed packaging assembly, the fin seal 46 is folded over to one side or the other as is known in the art. However, the longitudinal seal could be a lap seal. After the film material has being wrapped around the insert 12, a pair of end seal bars 50 crimp opposing layers of the film tube together to form a transverse end seal 52 at either end of the insert 12. In the present embodiment, the end seals are formed sequentially but they could be formed simultaneously using two pairs of end seal bars. The end seals are also fin seals but the end seal adjacent the bottom wall of the insert is folded over to one side so that the packaging assembly 10 can be stood upright on its base as shown in FIGS. 2 and 3. The process is run on a substantially continuous basis for a period of time with a number of filled inserts 12 being conveyed through the wrapping area 40 one after the other at a, usually, set spacing to be wrapped in the film 42.

[0065] At least the uppermost end seal 52a is a peelable seal and, as illustrated in FIG. 2, can be formed in a header 53 which includes a tab arrangement to assist a user in opening the wrapper 16. The header 53 has a region 53a of increased depth (as measured in the longitudinal direction of the package assembly) at the centre in which there is a non-sealed area 53b outboard of the transverse end seal 52a. In the non-sealed area 53b, the opposing portions of the film material are not bonded together so that they form tabs which can be grasped by a user to peel the uppermost end seal 52a apart. Typically, the longitudinal seal 46 will also be a peelable seal so that the wrapper can be opened sufficiently to remove the insert 12. The outer/upper edge of the header 53 may be curved at the centre to provide the region of increased depth.

[0066] In an embodiment which is a modification to the general HFFS process and apparatus, the tongue 22 is held in its closed position as the insert 12 is conveyed towards and into the wrapping area. This may be effected by means of a retaining or pushing lug indicated schematically at 54 in FIG. 4) which engages the outer surface of the tongue as the insert is conveyed and may be part of the infeed conveyor system. The lug is moved out the way when the insert is conveyed into the film tube so as not to foul the film. The HFFS apparatus may also be provided with finger's or other abutment means which (indirectly) engage the tongue at sides of the pack from outside the film at the time the lugs fall away to hold the tongue in the closed position. This prevents the beverage pads falling out until the film has been drawn around the end of the insert sufficiently to prevent the tongue opening.

[0067] It will be appreciated that the HFFS process for forming the wrapper 16 may vary from that shown in FIG. 4.

[0068] Because the flexible packaging film 42 is wrapped around the insert, 12 and the insert is configured closely to the outer periphery of the stacked beverage pads, the free space within the packaging assembly is kept to a minimum. This reduces the amount of packaging film 42 required when compared to that required to package an equivalent number of beverage pads using the known VFFS process. The beverage pads 14 are also much more securely packaged and less prone to movement within the packaging assembly.

[0069] The packaging film 42 can be any suitable type of film known in the art and the seals can be formed in any desired manner known in the art which is compatible with the intended application. The packaging film 42 may be a laminate having a gas impervious outer layer and an inner seal layer. The inner seal layer may comprise a heat sealable medium but a cold seal or pressure seal could also be used. The sealing medium may provide a permanent seal or a peelable seal. In an embodiment at least one seal is a peelable seal. In an embodiment, at least one of the seals is peelable and is provided with a cut out in the film material on one side to make it easier for a user to imitate peeling the seal apart.

[0070] The outer layer of the film material may be any suitable material such as Polyethylene terephthalate (PET). However, PET is not currently recyclable. In an embodiment, the film material 42 is selected to maximise the possibility of recycling and the outer layer could be an oriented polypropylene (OPP) or any other suitable material.

[0071] The insert 12 can me made of any suitable material. In an embodiment, the insert is made of a material which can be recycled. In an embodiment, the insert is made of cardboard, or cartonboard or other paper-based material. In an embodiment, the insert is made of corrugated (fluted) material in which the corrugations are provided on the outer surfaces of the insert. The use of a corrugated material helps to protect the beverage pads 14 during handling and transport. In an embodiment, the insert is made of a corrugated cardboard or cartonboard. In an embodiment, the insert is made from a single blank 60 of foldable material, such as cardboard, or cartonboard or other paper-based material and which may be corrugated. In an embodiment, the insert is made from a single blank of foldable material which can be erected without the use of adhesives.

[0072] FIG. 5 is a plan view of a blank 60 of foldable material for forming the insert of FIG. 1.

[0073] The blank 60 has a bottom wall panel 62 which forms the bottom wall 18 of the insert 12 when erected. The bottom wall panel has curved edge regions 64, 66 at opposing sides and straight edge regions 68, 70 along front and rear portions which extend between the curved edge regions.

[0074] A first peripheral wall panel 72 is connected by a fold line 74 to the bottom wall panel 62 along the front straight edge region 68. The first peripheral wall panel defines the front wall portion and part of each of the side wall portions of the insert 12 when erected. The dispensing aperture 38 is defined in first peripheral wall portion.

[0075] A second peripheral wall panel 76 is connected by a fold line 78 to the bottom wall panel 62 along the rear straight edge region 70. The second peripheral wall panel defines the rear wall portion and part of each of the side wall portions of the insert when erected. The tongue 22 is connected to an edge of the second peripheral wall panel distal from the bottom wall panel 62 by the fold line 26.

[0076] To erect the blank 60 into the insert, the first and second peripheral wall panels 72, 76 are folded relative to the bottom wall panel 62 about their respective fold lines 74, 78 in the same direction until they extend generally perpendicular to the bottom wall panel. Outer lateral edge regions of the first and second peripheral wall panels which are not connected with the bottom wall panel 62 are folded inwardly about the curved side edge regions of the bottom wall panel. On each side, the respective outer lateral edge regions of the first and second peripheral wall panels are overlapped to form the curved side wall regions of the insert and secured together where they overlap to hold the blank in its erected configuration. The overlapping outer lateral edge regions of the first and second peripheral wall panels may be bonded together using an adhesive or the like to hold them in position. However, in an embodiment, the overlapping outer lateral edge regions are provided with interlocking tabs which are engaged to hold the blank erected without the use of adhesive. In the embodiment shown, the interlocking tabs 82 comprises corresponding pairs of tabs 82a, 82b on the first and second peripheral wall panels. In the present embodiment there are three interlocking pairs of tabs 82a, 82b on either side but the number can be varied as required. The number and orientation of the interlocking tabs are selected to ensure that the overlapping outer lateral regions of the first and second peripheral wall panels remain firmly connected but without creating surfaces which may catch the packaging film or the beverage pads. Other arrangements for mechanically locking the overlapping outer lateral regions of the first and second peripheral wall panels can be adopted.

[0077] Following erection of the blank to form the insert 12, the insert can be filled as described above and the tongue folded about fold line 26 to extend from the rear wall portion 30 towards the front wall portion 32 across the open end of the interior volume above the uppermost beverage pads in the stacks. The size and shape of the tongue 22 can be varied. In an embodiment, the size and shape of the tongue 22 is selected to effectively hold the beverage pads 14 in position whilst using a minimum of material. As illustrated in FIGS. 1 and 5, the tongue may be substantially semi-circular in shape with a straight edge region at its edge distal from the fold line 26. However, as illustrated by broken lines 22a in FIG. 5 and in the embodiments shown in FIGS. 6 to 9, the tongue may have an alternative shape which is configured to best fit the products and outer peripheral shape of the insert 12. In the present embodiment where the insert is configured to contain two stacks of disc like beverage pads, the tongue may have two part-circular lug regions 22b, 22c which are directed towards the curved side wall portions 34, 36 such that each lug is located above a respective one of the stacks. Generally speaking, the tongue should be shaped and dimensioned to be effective in holding the product 14 in place when the insert is orientated horizontally for flow wrapping whilst keeping the amount of material in the tongue to a minimum.

[0078] During the flow wrapping procedure, the interior of the wrapper may be flushed with nitrogen in order to remove oxygen from the interior of the packaging assembly and help keep the ingredients, in particular coffee, fresh. In the present embodiment which comprises two side-by-side stacks 28 of beverage pads 14, there is potentially a dead space between the two stacks adjacent the rear wall portion 30 which may not be fully flushed. To alleviate this problem, a small hole or aperture 84 can be provided in the tongue at its centre adjacent to the rear wall and in a corresponding location in the bottom wall 18 to improve flushing and reduce oxygen levels in the pack.

[0079] As illustrated in FIG. 10, the wrapper 16 may be provided with a one-way degassing seal 86 to enable gasses given off by the packaged ingredients to vent out of the wrapper 16. This may be an external sticker seal which is adhered to the outside of the wrapper over one or more venting apertures in the film material.

[0080] In addition to protecting the beverage pads 14 and providing a suitable enclosure for flow wrapping, the insert 12 forms a convenient dispenser for holding the beverage pads after the packaging assembly has been opened and from which beverage pads can be removed by a user as required. Once the user has opened the wrapper 16, the filled insert can be removed from the wrapper and placed upright on a suitable surface resting on the bottom wall or the lower edges of the peripheral side wall. The tongue 22 can be moved to the open position to enable beverage pads to be selected and removed from the insert through the open upper end. In an alternative embodiment, a line of weakness may be provided between the tongue and the peripheral wall to enable the tongue to be easily removed on opening of the package assembly.

[0081] Whilst the packaging assembly 10 in accordance with the embodiment described above is particularly suited for packaging beverage pads 14, the teaching herein can be applied to packaging for a broad range of products. In particular, the teaching herein can be applied to packaging of other perishable products where a plurality of the products are to be packaged together, especially if the products can be arranged in stacks. The invention is particularly, but not exclusively, suitable for packaging a plurality of disc-shaped products. Such goods included as biscuits, cookies and other confectionery items. However, the invention in its broadest sense is not limited to use in packaging perishable or disc-shaped products can be adapted more widely for use in packaging any suitable product.

[0082] Relative positional terms such as “upper”, “top”, “lower” and “bottom” used herein (including the claims) in relation to the insert 12, the packaging assembly 10 and parts thereof should be understood as referring to the insert, packaging assembly, and part thereof when the insert or packaging assembly is in an upright generally vertical position with its bottom wall 18 below the tongue 22 and with its longitudinal axis X extending generally vertically, as illustrated in FIGS. 1 to 4, and 6 to 9. However, it will be appreciated that the insert and packaging assembly can be used in other orientations. For the avoidance of doubt, reference to the insert being in a horizontal orientation should be understood as meaning that the insert is held with its longitudinal axis X lying substantially horizontally. Generally, the insert 12 will be laid on its peripheral wall 20 when in a horizontal orientation.

[0083] The above embodiments are described by way of example only. Many variations are possible without departing from the scope of the invention in its various aspects as defined in the appended claims and set out in the various statements of invention in the summary of invention above.