EP2300334B1

EP2300334B1 - A pack for smoking articles

Info

Publication number: EP2300334B1
Application number: EP09737949A
Authority: EP
Inventors: John Graham England
Original assignee: British American Tobacco Investments Ltd; British American Tobacco Co Ltd
Current assignee: British American Tobacco Investments Ltd
Priority date: 2008-05-02
Filing date: 2009-03-25
Publication date: 2012-10-17
Anticipated expiration: 2029-03-25
Also published as: NZ588588A; RU2010148851A; BRPI0911472A2; GB0808047D0; JP2011519785A; AU2009242350B2; BRPI0911472B1; TW201012717A; ZA201007336B; RU2508238C2; EP2300334A1; TWI450846B; MY165324A; KR101494145B1; WO2009132905A1; KR20110006702A; AU2009242350A1; JP5436540B2

Description

Field the invention

This invention relates to a pack for smoking articles according to the preamble of claim 1, particularly but not exclusively cigarettes.

Background

It is well known to fabricate packs for smoking articles such as cigarettes from a blank of board, for example cardboard, that comprises front and rear panels connected by opposite side panels, a bottom panel and a lid. The lid may be configured in a so called flip-top arrangement.
A problem with such conventional packs is that the panels particularly the front and rear panels, may bow undesirably, especially when the grain of the board runs parallel to the length of the pack. It would be desirable to use thinner board for fabricating the packs in order to save cost but the use of thinner board can feel flimsy to the user and also the thinner board limits the options for pack shapes because the thinner board is too weak for wide packs.
It is known to provide an inner frame in a conventional flip-top pack to provide a jam against which the lid can abut in the closed position with its exterior periphery coextensive with the remainder of the pack. It has been proposed in US-A-5964345 to provide ribbing on the surface of the inner frame that abuts the interior surface of the front panel of the pack. However, this configuration undesirably uses up space within the container and adds to the overall material cost of the pack.
A corrugated pack made of moulded plastics material is known from US 3,327,887 . Also, reference is directed to WO 02/49940 .

Summary of the invention

According to the invention, there is provided pack for smoking articles, comprising the features of claim 1, particularly, comprising front and rear panels connected by opposite side panels, a bottom panel and a top panel, in which the pack is fabricated from sheet board stock material, at least one of the panels includes a plurality of transverse bands comprising corrugations on the exterior surface thereof formed by compression of the board stock material in the thickness of the sheet material, and the transverse bands are greater in thickness than a region between the bands.
The top panel may comprise a lid. The bands can be formed on the exterior periphery of the pack and both the front and rear panels may include the transverse bands.
The bands are compressed either during manufacture of the blank or as a pre-production step in the process of packing smoking articles into the pack.
The pack is fabricated from sheet board stock material and the bands comprise corrugations formed in the thickness of the sheet material. At least one of the corrugations may be formed on the lid.
The invention also includes a blank for fabricating a pack for smoking articles comprising the features of claims 13, particularly, comprising front and rear panel portions, a bottom panel portion and side panel portions and a portion to form a lid, in which at least one of the panel portions includes the plurality of transverse bands greater in thickness than a region between the bands.
The invention further includes a method of fabricating the pack for smoking articles comprising the features of claim 14, particularly, from a blank comprising front and rear panel portions, a bottom panel portion and side panel portions and a portion to form a lid, the method comprising forming in at least one of the panel portions the plurality of transverse bands greater in thickness than the region between the bands.
The method may be performed by feeding successive ones of the blank from a magazine thereof to a compressing station to form the bands, and feeding the compressed blanks to a smoking article packaging machine to be formed into packs filled with smoking articles.
As used herein, the term "smoking article" includes smokeable products such as cigarettes, cigars and cigarillos whether based on tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco or tobacco substitutes and also heat-not-burn products. The smoking article may be provided with a filter for the gaseous flow drawn by the smoker.

Brief description of the drawings

In order that the invention may be more fully understood, an embodiment thereof will now be described by way of illustrative example with reference to the accompanying drawings in which:

Figure 1 is a schematic perspective view of a cigarette pack from the front and one side with its lid closed;
Figure 2 illustrates the pack of Figure 1 with the lid open;
Figure 3 is a schematic, exploded view of the pack shown in Figures 1 and 2;
Figure 4 is a front view of the pack;
Figure 5 is a rear view of the pack;
Figure 6 is a side view of the pack;
Figure 7 is a bottom view of the pack;
Figure 8 is a schematic illustration of a blank used for fabricating the pack shown in Figures 1 to 7;
Figure 9 is a partial sectional view taken along the line A-A' in Figure 8
Figure 10 is schematic illustration of a facility for packaging cigarettes in a pack as shown in Figures 1 to 7; and
Figure 11 is a schematic illustration of an embossing station for use in the facility shown in Figure 10.

Detailed description

Referring to Figures 1 to 8, a flip-top pack 1 for cigarettes is formed from a blank shown in Figure 8 and comprises front panel 2, rear panel 3, side panels 4, 5, a bottom panel 6 and a hinged lid 7, all formed by folding and gluing selected portions of the blank shown in Figure 8, formed of board stock sheet material such as cardboard.
The pack has longitudinally extending bevelled edge portions 8 along the joins between the side panels 4, 5 and the front and rear panels 2, 3.
The lid 7 has sloping side edges 9 and a front edge 10 which in a closed position is lower than hinge line 11 for the lid, and the upper edges 12, 13 of the front and side panels 2, 3, 4 are correspondingly shaped to provide a close fit when the lid is shut. As shown in Figures 2 and 3, the pack contains twenty cigarettes 14 in this example and as well known in the art, the sloping arrangement of the lid 7 provides improved access to the cigarettes when the lid is opened.
An inner frame 15 of board stock sheet material such as cardboard is fitted within the upper part of the opening of the container e.g. by gluing and includes a re-entrant part 16 to provide user access to the cigarettes. The inner frame 15 is of a shape to bound the interior of the front and side panels 2, 3, 4 along with the bevelled edges 8 adjacent the front panel so as to act as a jam against which the lid 7 can abut when closed, with its exterior surface co-extensive with the front and side panels 2, 4, 5. The inner frame 15 includes depending flanges 17 which act as stops to hold the lid 7 when closed.
The front and rear panels 2, 3 are provided with transverse bands 18 that are formed by compressing the blank as will be explained in more detail later.
The transverse bands 18 comprise corrugations illustrated in Figure 9. The bands 18 have a thickness t which is greater than the thickness r of regions 19 between the bands 18. The regions 19 may be formed by compressing the board material along the regions 19 e.g. by scoring or swiping with a blunt blade.
In the described example, the corrugations 18 extend across the entire width of the front and rear panels 2, 3 and are of equal width w as shown in Figure 9. The regions 19 between the corrugations 18 are in this example rectilinear and parallel to one another. Further such corrugations 18A are provided on the front and rear of the lid 7 as shown in Figures 4 and 5.
The corrugations 18 have the effect of rigidifying and strengthening the front and rear panels 2, 3 of the pack, with the result that a thinner board stock material can be used for forming the blank without loss of rigidity of the assembled pack. This results in reduced cost not only in terms of the material used but also in terms of transport costs as a result of the reduced pack weight. The corrugations 18A perform a similar function for the lid 7.
Also, the rigidification provided by the corrugations 18 make the pack less susceptible to the direction of grain of the board stock which can be arranged either longitudinally or transversely of the pack without any significant change in rigidity in the front and rear panels 2, 3.
In addition, by using the described corrugations 18, the pack can be made wider than hitherto for a particular board thickness, thereby giving the designer freedom to devise new packaging designs.
Furthermore, the corrugations 18, 18A provide a tactile gripping surface on the exterior of the pack which assists the user in gripping the pack and opening the lid 7.
The card used in the pack 1 may have a weight of 180-300 g/squ.m, for example 280 g/squ.m, but with the provision of the bands 18, a lighter material may be used for example 215 g/squ. m. or even 200 g/squ.m. The lighter the weight, the less rigid the card, but this is ameliorated by the provision of the bands 18. The card is typically of the order of 0.3mm thick and the depth of the compressing that forms the bands 18 be of the order of 50% of the un-compressed card thickness.
A method of packaging cigarettes in the pack will now be described with reference to Figures 10 and 11. A magazine 20 as shown in Figure 10 contains a plurality of blanks 1' substantially as illustrated in Figure 8 but without the corrugations 18. The blanks may be pre-printed and pre-formed with lines of folding in a manner well known in the art. Individual blanks are conveyed sequentially to a compressing station 21 at which the corrugations 18 are compressed onto the pre-printed blank. Thereafter, the blanks are fed to a cigarette packaging machine 22 that is fed with a supply of cigarettes 23. The cigarette packaging machine 22 folds the blank so as to form the pack 1 and fills it with cigarettes that may be provided on the inner frame 15 and wrapped in foil (not shown).
In order to form the pack, the packaging machine 22 operates in a manner known to those in the art, so as to fold blank shown in Figure 8 along the hatched fold lines in order to create the pack. The blank 1' comprises a front panel portion 2' and a rear panel portion 3' that are connected by a base panel portion 6'. The lid is formed of a lid panel portion 7' that has a lid top 24, a lid rear panel 25, lid front panel 26 and re-entrant flaps 28-30 which can be folded inwardly to create the lid structure shown in Figures 1-3.
The side walls 4, 5 of the pack are formed from panel portions 4', 4", 5', 5" that depend from the front and rear panel portions 2', 3' respectively. When the pack is folded, the panel portions 4', 4" and 5, 5" overlie one another and are glued together to form the side panels 4, 5.
The bevelled edges 8 are created from regions 8' by folding along hatched fold lines 31, 32. When assembled, the lid 7 can hinge along hinge line 11.
Initially, the blank may be pre-printed with trading and user information but is without the corrugations 18, 18a. They are applied subsequently at the compressing station 21, which may utilise a compressing tool as illustrated in Figure 11. Here, the pre-printed blank 1' is placed in alignment with a compressing tool 34 shown in section which is moved in the direction at arrow A in order to compress the surface of the blank. The tool 34 includes a series of concave corrugations 35 that are a mirror of the eventual convex corrugations 18 formed in the blank which, when driven downwardly onto the blank 1' compress the corrugations into the blank to achieve the configuration shown in Figure 8.
Thereafter, the compressed blank 1' is fed to the cigarette packaging machine 22 shown in Figure 10 for assembly and filling as previously described.
Many modifications and variations of the described pack fall within the scope of the claims. Whilst the same number of corrugations 18 are shown on the front and rear panels 2, 3 of the pack, different numbers could be used, for example fewer corrugations 18 could be provided on the rear panel 3 as compared with the front panel. Also, not all of the front panel need be provided with the corrugations 18 and part of the panel surface may be provided in a planar configuration without corrugations.
Furthermore, whilst the described pack has bevelled edges 8, they can be omitted such that the pack either has rectangular edges or curved edges. When curved edges are provided, the corrugations 18 have the advantage of permitting a relatively thin board material to be used which can readily be deformed into a curved edge whilst providing the front and rear surfaces of the pack with rigidification.
The corrugations 18 do not need to be of the same width as described above and can be of varying widths. Furthermore, the corrugations do not need to be rectilinear and may have curved edges. The corrugations 18 do not need to extend across the entire width of the front and rear panels 2, 3.
Also, the tool for the compressing station 21 could be a rotary compressing device and other ways of creating the bands or corrugations will be apparent to those skilled in the art.
Also, the blanks may be pre-formed with the bands 18 at the time of manufacture so that the blanks held in the magazine 20 already have the bands, which avoiding the need for the compressing station 21.
Whilst the invention has been described in relation to a flip-top pack it can be used in connection with other packs for smoking articles which do not necessarily have a lid, for example a container that holds a plurality of flip-top cigarette packs.
Many other modifications and variations will be evident that fall within the scope of the following claims.

Claims

A pack (1) for smoking articles, comprising front and rear panels (2,3) connected by opposite side panels (4,5) a bottom panel (6) and a top panel (7), characterised in that;
the pack is fabricated from sheet board stock material;
at least one of the panels includes a plurality of transverse bands (18) comprising corrugations on the exterior surface thereof formed by compression of the board stock material in the thickness of the sheet material; and
the transverse bands are greater in thickness than a region between the bands.
A pack according to claim 1 wherein the top panel (7) comprises a lid.
A pack according to claim 1 or 2 wherein both the front and rear panels include said bands (18).
A pack according to claim 2 including at least one of the corrugations on the lid.
A pack according to any preceding claim wherein the corrugations have parallel side edges.
A pack according to any preceding claim wherein the corrugations extend between the side panels (4,5).
A pack according to any preceding claim wherein the sheet material comprises cardboard.
A pack according to any preceding claim, containing smoking articles.
A pack according to claim 9 wherein the smoking articles comprise cigarettes.
A pack according to any preceding claim wherein the top panel comprises a flip top lid.
A pack according to any preceding claim including an inner frame within the pack.
A pack according to any preceding claim wherein corner edges thereof are bevelled, curved or rectangular.
A blank (1') for fabricating a pack for smoking articles, comprising front and rear panel portions (2', 3'), a bottom panel portion (6') and side panel portions (4',5') and a portion (7') to form a lid characterised in that
the blank is fabricated from sheet board stock material;
at least one of the panel portions includes a plurality of transverse bands comprising corrugations(18) that have been formed by compression in the thickness of the board stock sheet material, to be disposed on the exterior of the pack when fabricated; and
the transverse bands are greater in thickness than a region between the bands.
A method of fabricating a pack for smoking articles from a blank (1') of board stock material comprising front and rear panel portions (2', 3'), a bottom panel portion (6') and side panel portions (4', 5') and a portion (7') to form a lid, wherein the blank is fabricated from sheet board stock material, the method comprising forming in at least one of the panel portions a plurality of transverse bands comprising corrugations (18) formed in the thickness of the sheet material, the corrugations being formed by compression of the board stock so as to be disposed on an exterior surface of the pack when fabricated from the blank, the bands being greater in thickness than a region between the bands.
A method according to claim 16 including feeding successive ones of the blank from a magazine thereof to an embossing station to form said bands, and feeding the compressed blanks to a cigarette packaging machine to be formed into packs filled with cigarettes.