AU2007304042B2

AU2007304042B2 - Pack for tobacco

Info

Publication number: AU2007304042B2
Application number: AU2007304042A
Authority: AU
Inventors: John Hall
Original assignee: British American Tobacco Investments Ltd
Current assignee: British American Tobacco Investments Ltd
Priority date: 2006-10-03
Filing date: 2007-10-02
Publication date: 2011-09-01
Anticipated expiration: 2027-10-02
Also published as: GB0619532D0; EP2091826B1; PL2091826T3; ATE507153T1; DE602007014254D1; ES2365559T3; EP2091826A1; AR063951A1; WO2008040955A1; CA2665077A1; NZ575798A; AU2007304042A1

Abstract

A pack for tobacco comprises a receptacle with an upper face that closes the receptacle, and which is divided by a hinge line running across the upper face to define a lid portion and a fixed portion, the fixed portion remaining in a closed position and the lid portion rotatable about the hinge line between a closed position that is substantially coplanar with the fixed portion, and an open position that gives access to the interior of the receptacle. The pack may have a parallelepiped shape, with the hinge line running diagonally across the upper face. An abutment member may be provided to maintain the closed lid portion coplanar with the fixed portion, and a closure assembly may hold the lid portion in the closed position.

Description

TITLE OF THE INVENTION PACK FOR TOBACCO BACKGROUND OF THE INVENTION The present invention relates to a pack for tobacco, particularly for loose 5 tobacco. Any discussion of the prior art throughout the specification should in no way be considered as an admission that such prior art is widely known or forms part of common general knowledge in the field. Tobacco can be supplied to the consumer as loose tobacco, either for making 10 hand-rolled cigarettes, or as pipe tobacco. Traditionally, loose tobacco of this type is packaged in pouches, comprising a bag portion for containing the tobacco and a flap portion extending from the top of the bag which can be folded over the opening of the bag and sometimes wrapped around the bag before being stuck down to close the pouch. The pouch is typically made from paper or thin cardboard laminated or otherwise 15 covered with a layer of transparent plastics material through which printed labelling on the paper or card can be seen, or from plastics material alone upon which printing can be executed. Traditional pouches of this type are soft and lacking in rigidity, and can therefore be awkward to pack into boxes in quantity for shipping. For the same reasons, they are 20 difficult for vending machines to handle, and for a retailer to stack onto a shelf. Also, they can be awkward to manipulate while rolling a cigarette. It is an object of the present invention to overcome or ameliorate at least one of the disadvantages of the prior art, or to provide a useful alternative. SUMMARY OF THE INVENTION 25 Accordingly, a first aspect of the present invention is directed to a pack for tobacco, comprising: a receptacle for receiving tobacco, the receptacle having an upper face that closes the receptacle, and a hinge line running across the upper face, the hinge line dividing the upper face into a lid portion and a fixed portion, the fixed portion remaining in a closed position and the lid portion rotatable about the hinge line between 30 a closed position that is substantially coplanar with the fixed portion, and an open -2 position that gives access to the interior of the receptacle, wherein the receptacle has one or more abutment members, wherein the pack further comprises one or more abutment members extending from upper edges of side wall(s) so as to be adjacent to the underside of the lid portion, when said lid portion is in a closed position, to inhibit the 5 lid portion from rotating below the plane of the fixed portion, the pack further comprises a closure assembly operable to releasably maintain the lid in its closed position, the closure assembly comprising one or more recessed portions on an edge of the lid portion, and one or more corresponding protruding portions upstanding on an adjacent edge of the receptacle, the portions on the edge of the lid portion inter-engaging with the 10 portions on the adjacent edge in an interference fit when the lid portion is in a closed position. Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is to say, in the is sense of "including, but not limited to". This gives a pack with a flat surface, defined by the upper face, that is useful to a smoker rolling a cigarette. The fixed portion makes available a flat surface for receiving tobacco that is removed from the pack when the lid portion is opened, and also for accommodating cigarette papers and other smokers' materials while the smoker is 20 opening and closing the pack and handling the tobacco. Then, the area of the flat surface can be increased by closing the lid portion, giving a convenient flat surface for rolling a cigarette. The receptacle may have a parallelepiped shape, defined by the upper face, a lower face opposite the upper face, and four side walls extending between the upper face 25 and the lower face, the upper and lower faces having a substantially larger area than the side walls. Such a configuration maximises the area offered by the upper face for a given pack volume. Also, a parallelepiped shape is convenient for efficient packing of the boxes into cartons for shipping and storing, and for fitting the packs into vending machines and displaying the packs for retail purposes. 30 The hinge line may run between two opposite corners of the upper face. This gives strength to the pack to resist crushing and other damage, and also to give a more rigid flat surface for the smoker.

-3 The pack may comprise one or more abutment members extending from the receptacle adjacent the underside of the upper face, and positioned to inhibit the lid portion from rotating below the plane of the fixed portion. Again, this helps to maintain the rigidity of the upper face to give the smoker an improved flat surface. Also, 5 movement of the lid portion into positions inside the receptacle from which it would be more difficult to open the pack is limited or prevented. The pack may further comprise a closure assembly operable to releasably maintain the lid in its closed position. The closure assembly may comprise one or more protruding or recessed portions on an edge of the lid portion, and one or more corresponding recessed or protruding 10 portions on an adjacent edge of the receptacle, the portions on the edge of the lid portion interengaging with the portions on the adjacent edge in an interference fit when the lid portion is in the closed position. A closure assembly of this type can be easily opened with one hand. Also, by appropriate sizing of the recessed and protruding portions, the closure assembly can be arranged to give a largely smooth and continuous upper face 15 without irregularities on which pieces of tobacco may become caught, and at the same time provide closure of the pack with a minimum of material. Hence, in this and other embodiments, the closure assembly may be configured such that when the lid is in the closed position there are substantially no discontinuities in the plane of the upper surface. 20 The pack may be formed from a folded blank.

-4 BRIEF DESCRIPTION OF THE DRAWINGS For a better understanding of the invention and to show how the same may be carried into effect reference is now made by way of example to the accompanying drawings in which: 5 Figures 1A and IB show perspective views of a pack according to first embodiment of the invention, respectively in open and closed positions; Figures 2A, 2B and 2C show perspective views of packs according to further embodiments, having various outer shapes; and Figures 3 A, 3B and 3C show partial cross-sectional views of packs according to 10 further embodiments, having various abutment members that limit movement of a lid portion.

WO 2008/040955 PCT/GB2007/003729 -5 DETAILED DESCRIPTION Figure LA shows a perspective view of a pack according to an embodiment of the invention, the pack being in an open configuration. Figure 1B shows the same 5 pack in a closed configuration. The pack 10 is in the form of a receptacle for tobacco, which in this embodiment has a parallelepiped shape. The receptacle is defined by an upper face 12, a lower face opposite the upper face 12 (not visible in the Figures), and four side walls 14 that extend between and join the lower face and the upper face 12. In this example, 10 the upper face 12 and the lower face each have a square shape. Also, the edges of the upper face 12 and the lower face are significantly longer than the vertical edges of the side walls 14, so that the upper face 12 and the lower face have a much greater surface area than the side walls 14. Hence the receptacle has the form of a shallow tray with a lid, where the upper face 12 forms the "lid" and acts to close the receptacle and retain 15 its contents, in this case loose tobacco 16. The upper face 12 is divided in two by a hinge line 18 that runs across the upper face 12 from one corner to the diagonally opposite corner. The hinge line 18 is best seen in Figure 1B. The hinge line 18 defines two portions: on one side of the hinge line 18 the upper face 12 has the form of a lid portion 20, and on the other side 20 of the hinge line 18 the upper face 12 has the form of a fixed portion 22. Depending on the material and the manufacturing method used to make the pack 10, the hinge line 18 may be formed for example by a score line, a line of perforations, or a line of thinner material. The fixed portion 22 is joined at its edges other than the edge defined by the 25 hinge line 18 to the side walls 14. The fixed portion 22 thus has a fixed, closed position relative to the receptacle, and is not movable relative thereto. Tobacco 16 is accommodated in the space below the fixed portion 22, however.

WO 2008/040955 PCT/GB2007/003729 -6 The lid portion 20 is not joined to the side walls, and is instead connected to the receptacle by way of the hinge line 18, so that it is continuous with the fixed portion 22. The lid portion 20 is rotatable about the hinge line 18 between a closed position shown in Figure 1B and an open position shown in Figure IA. When in the 5 closed position, the lid portion 20 is in contact with or closely adjacent to the top edges of the side walls 14 so as to close the receptacle. Also, when in the closed position, the lid portion 20 and the fixed portion 22 are substantially co-planar, so that the upper face 12 has the form of a substantially flat surface. To open the pack 10, so as to gain access to the contents of the receptacle, the user lifts an edge of the lid 10 portion 20 and rotates the lid portion 20 about the hinge line 18 so as to fold it towards the fixed portion 22. This opens an aperture under the lid portion 20 which is delineated by the hinge line 18 and the upper edges of the side walls 14. This arrangement gives a pack that is particularly well-adapted to the needs of a smoker who wishes to roll his own cigarettes. The pack is easily opened (in some is embodiments with one hand, as described later) to give access to the tobacco within. Once opened, the fixed portion 22 of the upper face 12 offers a flat surface on which the smoker can deposit tobacco 16 removed from the pack 10. This surface can also accommodate cigarette papers, matches, filters and the like while the smoker takes tobacco 16 from the pack 10. Further, the flat surface can then be used as a surface on 20 which to roll a cigarette using the tobacco from the pack, and more usefully, a larger area can be obtained by lowering the lid portion 20 back to its closed position, so that the whole of the upper surface forms a single flat plane on which the cigarette can be made. The particular shape and configuration of pack shown in Figures IA and lB is 25 useful in that square packs can be more easily deposited into larger cartons for shipping, since it is immaterial which way round the pack is put into the carton. Also, the diagonal arrangement of the hinge line imparts rigidity to the pack, since the pack is then braced across its longest dimension. Improved rigidity reduces damage and WO 2008/040955 PCT/GB2007/003729 -7 crushing during shipping, storage and use of the pack. However, packs according to the invention are not limited to the configuration of Figures LA and 1B, and can take a wide range of shapes. For example, Figure 2A shows a pack 30 which has the form of a square 5 parallelepiped, like the pack 10 of Figures IA and 1B, but in which the hinge line 18 is positioned parallel to two opposite sides of the upper face 12. The two options of a diagonal hinge line or a parallel hinge line may similarly be implemented with a parallelepiped pack in which the upper and lower faces are rectangular. Figure 2B shows a pack 40 in which the upper face 12 and the lower face are 10 triangular, so that these faces are connected by three side walls 14. The hinge line 18 runs across the upper face 12 from one corner of the triangle to the centre of the opposite side. Other polygonal shapes can also be used, both regular and irregular. Figure 2C shows a pack 50 in which the upper face 12 and the lower face are circular, connected by a single cylindrical side wall 14. The hinge line 18 is defined 15 along a diameter of the upper face 12. The upper and lower faces may alternatively be oval. Square, rounded or bevelled edges or corners may be used in conjunction with any shape of pack. In each of the above examples, the hinge line 18 bisects the upper face 12, so 20 that the lid portion 20 and fixed portion 22 have the same area. This maximises both the size of the aperture through which the user accesses the contents of the pack 10 and the available flat surface offered by the fixed portion 22 while the lid portion 20 is open. However, the hinge line may be positioned to divide the upper face into two unequal parts if desired. 25 Returning to Figure LA, it will be seen that the pack 10 further comprises a rim or abutment member 24. This is a portion that extends inwardly, towards the interior of the receptacle, from the upper edges of the side walls 14, at least on those side walls 14 adjacent to the edges of the lid portion 20. The rim 24 thus extends partly WO 2008/040955 PCT/GB2007/003729 -8 underneath the lid portion 20 so as to be adjacent to the underside edge of the lid portion 20 when the lid portion 20 is in its closed position. Thus, when the lid portion 20 is closed, it abuts the rim 24. This arrangement stops the lid portion 20 from rotating too far about the hinge line 18, past its closed position, and falling down into 5 the interior of the receptacle, from where it would be difficult to be opened. Also, the abutment with the rim 24 keeps the lid portion 20 and the fixed portion 22 substantially coplanar if pressure is exerted on the upper face 22, thus maintaining the upper surface 12 flat while a cigarette is rolled upon it. Figure 3A shows a first example embodiment of the rim 24, illustrated as a 10 partial vertical cross-sectional view through a pack according to the invention. The rim 24 comprises a protruding flange extending from the upper edge of the side wall 14, at right angles thereto. The flange may be given rigidity so that it maintains its position under applied pressure by extending the flange continuously around corners of the pack, as in Figure IA. This embodiment offers a relatively simple construction, and 15 also uses a minimum of material. However, tobacco 16 that occupies the space under the rim may be difficult to remove from the pack, or may be overlooked altogether. Figure 3B shows a second example embodiment of the rim 24, which addresses the above problem of tobacco 16 underneath the rim 24 of the first example. In this embodiment, the rim 24 comprises a flange like that of the first example, but 20 which is supported by a downwardly extending support member 26, which extends vertically between the inner edge of the flange and the upper surface of the lower face 28 of the receptacle. This give a strong structure similar to a box girder, giving rigidity to the pack and making it more resistant to crushing. Also, tobacco cannot become trapped or hidden in the space under the rim. However, the presence of the support 25 member 26 reduces the interior volume of the receptacle and hence the amount of tobacco that can be provided in the pack. Figure 3C shows a third example embodiment of the rim 24, which offers some of the increased strength of the second example, while increasing the available WO 2008/040955 PCT/GB2007/003729 -9 interior volume. In this example, the flange is supported by a sloping support member 30 that extends between the inner edge of the flange and the outer edge of the lower face 28, to make a triangular box girder structure. Note that for ease of understanding, Figures 3A, 3B and 3C show the lid 5 portion 20 spaced slightly apart from the abutment member 24, whereas in use, if the lid is securely closed and/or pressure is applied to the upper face 12, the lid portion 20 will likely contact the abutment member 24. The abutment member may have other structures than those illustrated. For example, the rim may extend outwardly from the side walls rather than inwardly, if 10 used in conjunction with an overhanging lid portion. Further, the abutment member need not be continuous along the side walls as in Figure 1A. Instead, one or more individual abutment members may be positioned separately at various locations along the side walls. Also, the abutment member may be omitted. For example, the upper edges of the side walls may provide sufficient support and movement-limiting effect if 15 the lid portion extends over at least part of these upper edges. Packs according to the invention may further comprise a closure assembly by which the lid portion can be held in the closed position until the user desires to open the pack. A first example is illustrated in Figures 1A and 1B. One edge of the lid portion 20 has a recessed, cut-out portion 32a extending along the greater part of its 20 length from the end adjacent to the hinge line 18. The remaining part of the edge, adjacent to the corner opposite the hinge line 18 is not cut out and forms a protruding portion 32b. The upper edge of the adjacent side wall is formed so as to have corresponding protruding and recessed portions. That is, the greater part of the edge is a protruding portion 34a of the same length as the recessed portion 32a in the lid 25 portion, and the remaining part of the edge, adjacent to the corner opposite the hinge line 18, is cut out to form a recessed portion 34b of the same length as the protruding portion 32b. When the lid portion 20 is brought into its closed position, the protruding portion 32b on the lid portion enters the recessed portion 34b on the side wall 14, and -10 the protruding portion 34a on the side wall 14 enters the recessed portion 32a on the lid portion 20. Because the corresponding portions have substantially equal lengths, this interengagement produces an interference fit, and the lid portion 20 is held closed. The particular arrangement of protruding and recessed portions in Figure 1A 5 gives a small part of the lid portion (the protruding portion 32b) located at the corner of the pack opposite the hinge line 18 that is accessible from the side wall 14. This portion can engaged using a finger or thumb, so that the lid portion 20 can be pushed upwards out of the interference fit closure and rotated about the hinge line 18 so as to open the pack. The pack can thereby conveniently be opened with one hand. However, other 10 arrangements of engaging protruding and recessed portions can be used instead, although one-handed operation will be possible with at least some of the other possible configurations. In the example of Figure IA, the distance by which the recessed portions are recessed from the protruding portions is equal to the thickness of the material from 15 which the portions are made. This means that when the lid portion is closed and the portions are interengaged, there are no discontinuities (protrusions or depressions) in the plane of the upper face 20. A substantially smooth upper face is provided, with no parts in which loose bits of tobacco could become caught. Also, the appearance of the pack is enhanced by the smooth outer surface. The protruding and recessed portions may have 20 other dimensions, however, although the example of Figure 1 uses and wastes a minimum of material. Packs according to the invention may further comprise a sealing layer (not shown) disposed under the lid portion 20 to seal the aperture which is exposed when the lid portion 20 is opened. Such a sealing layer will keep the tobacco 16 in the pack fresh 25 until the pack is first opened by a user. The sealing layer can be adhered to the edges of the aperture, for example adhered to the rim 24 or to the upper edges of the side walls 14, in such a way that it can be peeled off and disposed of by the user on first opening the pack. Alternatively, the sealing layer may be resealable, so that it can be stuck back down over the aperture to maintain freshness of the tobacco after the pack has been 30 opened. Additionally or alternatively, the pack may be provided with a removable outer wrapper, for example a cellophane or plastic wrapper, that is removed on first opening the pack.

- 11 The packs according to the invention can be fabricated from any suitable material and using any suitable technique. For example, the packs can be assembled by folding and gluing one or more blanks of cardboard or stiff paper in the manner used to make conventional crush-proof cigarette packs. Alternatively, the packs can be made from 5 plastics materials, for example by moulding, including injection moulding or thermo forming. The shape of the pack may determine the choice of material and fabrication technique. For example, the circular pack of Figure 2C may be simpler to make from plastics than from cardboard. The interengaging closure portions in Figure 1 A may also be found to be more conveniently implemented for a plastics pack. 10 The packs are not limited to being packs for tobacco intended for the hand rolling of cigarettes. Although many features of the packs are of particular use for cigarette rolling, other features such as the outer shape and rigidity being advantageous for packing, shipping, storing and vending are relevant for other tobacco products. For example, the tobacco may be pipe tobacco, loose snus or portion snus.

Claims

1. A pack for tobacco comprising a receptacle for receiving tobacco, the receptacle having an upper face that closes the receptacle, and a hinge line running across the upper face, the hinge line dividing the upper face into a lid portion and a fixed portion, the 5 fixed portion remaining in a closed position and the lid portion rotatable about the hinge line between a closed position that is substantially coplanar with the fixed portion, and an open position that gives access to the interior of the receptacle, wherein the receptacle has one or more side walls, wherein the pack further comprises one or more abutment members extending from upper edges of side wall(s) so as to be adjacent to the 10 underside of the lid portion, when said lid portion is in a closed position, to inhibit the lid portion from rotating below the plane of the fixed portion, the pack further comprises a closure assembly operable to releasably maintain the lid in its closed position, the closure assembly comprising one or more recessed portions on an edge of the lid portion, and one or more corresponding protruding portions upstanding on an adjacent 15 edge of the receptacle, the portions on the edge of the lid portion inter-engaging with the portions on the adjacent edge in an interference fit when the lid portion is in a closed position.

2. A pack according to claim 1, in which the receptacle has a parallel piped shape, defined by the upper face, a lower face opposite he upper face, and four side walls 20 extending between the upper face and the lower face, the upper and lower faces having a substantially larger area than the side walls.

3. A pack according to claim 2, in which the hinge line runs between two opposite corners of the upper face.

4. A pack according to any preceding claim, in which the closure assembly is 25 configured such that when the lid is in the closed position there are substantially no discontinuities in the plane of the upper surface.

5. A pack according to any preceding claim, in which the pack is formed from a folded blank. - 13

6. A pack for tobacco substantially as herein described with reference to any one of the embodiments of the invention illustrated in the accompanying drawings and/or examples.