# Patent

## Title
Carton and carton blank

## Abstract

A carton for packaging one or more articles (B), includes a series of main panels (2, 6, 8, 10, 14) hinged one to the next to form a tubular structure. The tubular structure includes a top panel (8), first and second side panels (6, 10) and a base panel (2, 14) and at least one display window (59) struck from at least one of the side panels (6, 10). The at least one window extends from the top panel (8) to the base panel (2, 14) and is interrupted by a retention strap (72).

## Background
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a National Phase of PCT Application No. PCT/US2012/024768, filed Feb. 10, 2012, which claims the benefit of U.S. Provisional Application No. 61/442,144, filed Feb. 11, 2011, which is incorporated herein by reference in its entirety.


FIELD OF INVENTION
The invention relates to cartons for packaging articles and blanks for forming the same. In particular, though not exclusively, the present invention relates to cartons comprising a window panel through which the carton contents are accessible though not removable, which window panel engages a lower portion of the article, and a blank for forming the same.
BACKGROUND OF THE INVENTION
In the field of packaging it is desirable to provide a package, comprising one or more articles, one or more of which articles is visible from the exterior of the package. This promotes awareness of the contents of the package and reduces the need for additional promotional advertising on the packaging itself. However, it is desirable that the article(s) contained in the packaging be securely retained therein until it is desired that it or they be removed. To this end it is advantageous that the article(s) that are visible from the exterior of the package also be securely retained within the package.
It is the aim of the present invention to provide a carton for packaging one or more articles that allow an article to be visible exterior of the carton yet retained within the carton until it is desired that an article be removed.
It may also be desirable to obscure a portion of the article for example to hide a product code, a label or other branding or information on the article.
SUMMARY OF INVENTION
The present invention seeks to overcome or at least mitigate the problems of the prior art.
A first aspect of the present invention provides a carton for packaging one or more articles which carton comprises a series of main panels hinged one to the next forming a tubular structure comprising a top panel, first and second side panels and a base panel, the tubular structure comprising at least one display window struck from at least one of the side panels and extending from the top panel to the base panel which display window is interrupted by a retention strap.
This has the advantage of improving retention of the article within the carton.
Another advantage is that the orientation of the article need not be controlled during packaging.
Preferably, the display window comprises one or more window panels hinged to the side wall from which the display window is struck.
Preferably, the retention strap engages with a flange or protrusion of the article being displayed in the display window.
Preferably, the retention strap obscures from view a portion of the article being displayed.
Preferably, the portion of the article obscured by the retention strap is less in surface area than the portion displayed in the window.
Preferably, the article being displayed comprises a first linear dimension such as height and the retention strap obscures less of said first linear dimension than the window exposes or displays.
A second aspect of the present invention provides a blank for forming a carton of the wraparound type, the blank comprising: a first bottom panel, a first side panel, a top panel, a second side panel and a second bottom panel hinged one to the next in series, at least the first side panel comprising means for forming a display window comprising at least two hingeable tabs separated by a weakened line of severance, weakened line and hingeable tabs extending from one of the bottom panels locking and terminating at a retention strap integrally formed within the first side panel and being contiguously formed therewith to retain an article contained by a carton formed from the blank and displayed in the display window which is formed when the hingeable tabs are folded inwardly of the carton.
Preferably, the hingeable tabs are each defined by a curved weakened line.
Preferably, the curved weakened line is formed from an alternating series of half-depth cuts and creases.
Preferably, the retention strap is defined by two spaced cut lines, wherein the curved weakened lines of the hingeable tabs each terminate on one of the two spaced cut lines and wherein the other of said two-spaced cut lines defines, at least in part, an article receiving aperture.
Preferably, the two spaced cut lines are both substantially arcuate in shape.
Preferably, the means for forming a display window comprises four hingeable tabs, the four hingeable tabs being separated longitudinally by the weakened line and laterally by the retention strap, wherein the retention strap is defined by two spaced cut-lines.
Preferably, the two-spaced cut-lines are similarly shaped, are not similarly shaped, are linear-shaped are curved or are curvilinear shaped.
A third aspect of the present invention provides a carton of the wraparound type comprising: a first bottom panel, a first side panel, a top panel, a second side panel and a second bottom panel hinged one to the next in series, the first and second bottom panels being connected together to form a tubular structure, at least the first side panel comprising a display window comprising at least two inwardly hinged tabs separated by a weakened line of severance, the weakened line and hingeable tabs extending from one of the bottom panels and terminating at a retention strap integrally formed within the first side panel and being contiguously formed therewith to retain an article contained by the carton and displayed in the display window.
Preferably, the hingeable tabs are each defined by a curved weakened line.
Preferably, the curved weakened line is formed from an alternating series of half-depth cuts and creases.
Preferably, the retention strap is defined by two spaced cut lines, wherein the curved weakened lines of the hingeable tabs each terminate on the lowermost of the two spaced cut lines and wherein the other of said two-spaced cut lines defines, at least in part, an article receiving aperture.
Preferably, the two spaced cut lines are both substantially semi-circular shaped.
Preferably, the display window comprises four hingeable tabs, the four hingeable tabs being separated longitudinally by the cut line and laterally by the retention strap and wherein the retention strap is defined by two spaced cut lines.
Preferably, the two-spaced cut lines are similarly shaped, are not similarly shaped, are linear shaped, are curved or are curvilinear shaped.
A fourth aspect of the present invention provides a blank for forming a carton, the blank comprising a series of main panels for forming carton structure including a side panel, the side panel comprising means for forming a display window having at least two hingeable tabs separated by a cut line the cut line and hingeable tabs extending from a lower part of the side panel and being interrupted by a retention strap integrally formed within the side panel and being contiguously formed therewith for retaining an article contained by a carton formed from the blank and displayed in the display window which window is formed when the hingeable tabs are folded inwardly of the carton.
Preferably, for forming a carton of the wraparound type, the blank comprising: a first bottom panel, a first side panel, a top panel, a second side panel and a second bottom panel hinged one to the next in series, the first and second bottom panels each comprising a co-operative part of a complementary locking mechanism, at least the first side panel comprising the means for forming a display window and wherein, the cut line and the hingeable tabs extend from one of the co-operative parts of the complementary locking mechanism formed in the first bottom panel and terminate at the retention strap.
Preferably, the hingeable tabs are each defined by a curved weakened line.
Preferably, the curved weakened line is formed from an alternating series of half-depth cuts and creases.
Preferably, the retention strap is defined by two spaced cut lines, wherein the curved weakened lines of the hingeable tabs each terminate on one of the two spaced cut lines and wherein the other of said two-spaced cut lines defines, at least in part, an article receiving aperture.
Preferably, the two spaced cut lines are both substantially semi-circular shaped.
Preferably, the means for forming a display window comprises four hingeable tabs being separated longitudinally by the cut line and laterally by the retention strap and wherein the retention strap is defined by two spaced cut lines.
Preferably, the two spaced cut lines are similarly shaped, are not similarly shaped, are linear shaped are curved or are curvilinear shaped.
A fifth aspect of the present invention provides a carton comprising a side panel having a display window, the display window comprising at least two inwardly hinged tabs separated by a cut line, the cut line and hingeable tabs extending from a lower part of the side panel an being interrupted by a retention strap integrally formed within the side panel and being contiguously formed therewith for retaining an article contained by the carton and displayed in the display window.
Preferably, the carton is of the wraparound type and comprises: a first bottom panel, a first side panel, a top panel, a second side panel and a second bottom panel hinged one to the next in series, the first and second bottom panels each comprise a co-operative part of a complementary locking mechanism and are thereby connected together to form a tubular structure, at least the first side panel comprising the display window and the cut line and the hingeable tabs extend from one of the co-operative parts of the complementary locking mechanism formed in the first bottom panel and terminate at the retention strap.
Preferably, the hingeable tabs are each defined by a curved weakened line.
Preferably, the curved weakened line is formed from an alternating series of half-depth cuts and creases.
Preferably, the retention strap is defined by two spaced cut lines, wherein the curved weakened lines of the hingeable tabs each terminate on the lowermost of the two spaced cut lines and wherein the other of said two-spaced cut lines defines, at least in part, an article receiving aperture.
Preferably, the two spaced cut lines are both substantially semi circular shaped.
Preferably, the display window comprises four hingeable tabs, the four hingeable tabs being separated longitudinally by the cut line and laterally by the retention strap and wherein the retention strap is defined by two spaced cut lines.
Preferably, the two spaced cut lines are similarly shaped, are not similarly shaped, are linear shaped, are curved or are curvilinear shaped.
A sixth aspect of the present invention provides a carton for packaging one or more articles which carton comprises a series of main panels hinged one to the next forming a tubular structure, the tubular structure comprising a top panel, bottom panel and a pair of opposing side panels, at least one of the side panels comprising a display window, the display window comprising a first aperture extending from the top panel to a first upper edge of a retention strap and a second aperture extending from the bottom panel to a second lower edge of said retention strap.
Preferably, the second aperture comprise a first pair of window panels hinged to opposing sides thereof and foldable inwardly of the carton
Preferably, the first aperture comprises a second pair of window panels hinged to opposing sides thereof and foldable inwardly of the carton.
Preferably, the or each window panel of the second aperture comprises a weakened line of severance disposed between a hinged connection to the side wall and a free distal edge and extending from a lowermost edge of the window panel towards which weakened defines in part a yieldable tab for accommodating article.
Preferably, the retention strap comprises an engaging edge for engaging with a flange or protrusion of an article.
Preferably, the retention strap obscures information displayed on an article displayed within the display window.



BRIEF DESCRIPTION OF THE DRAWINGS
Exemplary embodiments of the invention will now be described with reference to the accompanying drawings, in which:
FIG. 1 is a plan view of a blank for forming a carton according to a first preferred embodiment of the present invention;
FIG. 2 is a side view of an erected carton formed from the blank of FIG. 1;
FIG. 3 is a plan view of a portion of the blank of FIG. 1;
FIG. 4 is an enlarged perspective view of an article engaging arrangement of the assembled carton of FIG. 3;
FIG. 5 is a perspective view of a package loaded with articles utilising the blank of FIG. 1;
FIG. 6 illustrates a blank for forming a carton according to a second embodiment of the present invention; and
FIG. 7 illustrates a carton formed from the blank of FIG. 6.



DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS OF THE PRESENT INVENTION
Detailed descriptions of specific embodiments of the package, blanks and cartons are disclosed herein. It will be understood that the disclosed embodiments are merely examples of the way in which certain aspects of the invention can be implemented and do not represent an exhaustive list of all of the ways the invention may be embodied. Indeed it will be understood that the packages, blanks and cartons described herein may be embodied in various and alternative forms. The Figures are not necessarily to scale and some features may be exaggerated or minimized to show details of particular components. Well-know components, materials or methods are not necessarily described in great detail in order to avoid obscuring the present disclosure. Any specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the invention.
The present invention relates generally to a carton for packaging articles which carton comprises an article engaging arrangement for engaging an article. The preferred embodiments described herein further comprise a viewing window arrangement or display window 59 struck from a wall of the carton, which window presents for view a substantial portion of an article contained within the carton, adjacent to that side wall. The present invention is particularly suited to engaging articles formed with a petaloid lower portions (that is to say, lower portions that take the form or shape of a petal of a flower) such as is common amongst drinks bottles, the aforementioned recess being formed, in which case, between adjacent ‘petals’ thereof, however use of the carton with other types of article is envisaged.
Turning to FIG. 1, there is illustrated a blank 11 for forming a carton according to a first embodiment. The blank 11 comprises a linear series of panels consisting of a first bottom panel 2, a first bevel panel 4, a first side panel 6, a top panel 8, a second side panel 10, a second bevel panel 12 and a second bottom panel 14 hinged one to the next by corresponding fold lines 16, 18, 20, 22, 24, 26.
First side panel 6 comprises a fold line 19 extending longitudinally across the first side panel 6. Second side panel 10 comprises a fold line 21 extending longitudinally across the second side panel 10.
The blank 11 is foldable to form a package P as illustrated in FIG. 5. The first and second bottom panels 2, 14 are engageable with one another in at least partially overlapping relationship to form a composite bottom wall 2, 14 of the carton. Preferably, the bottom panels 2, 14 comprise a lock system formed of complementary tabs and apertures to maintain them in engagement. To this end, a series of male tabs 55 are defined in the second bottom panel 14 and a corresponding series of female flaps 54 defined in the first bottom panel 2. When the first and second bottom panels 2, 14 are brought into superposition, the male tabs 55 are displaceable from the plane of the second bottom panel 14 and folded inwardly to extend through apertures defined by a resultant inward folding of the female flaps 54 out of the plane of the first bottom panel 2. Protrusions extending laterally of the male tabs 54 are deformed as they pass through these apertures but subsequently return to a substantially planar condition, thereby to prevent removal thereof. The first and second bottom panels 2, 14 are thus maintained in engagement.
The first bottom panel 2 further comprises portions of two first bottom locking arrangements 80 and a portion of a second bottom locking arrangement 89. Preferably, the first bottom locking arrangements 80 are disposed one either side of the second bottom locking arrangement 89.
The first bottom locking arrangements 80 extend from the first bottom panel 2 across the first bevel panel 4 and into the first side panel 6, in-so-doing interrupting the fold lines 16, 18 which hinge the first bottom panel 2, first bevel panel 4 and first side panel 6 one to the next. Each first bottom locking arrangement 80 comprises a first aperture 56 defined in the first bottom panel 2 and a second aperture 86 defined in the first side panel 6. An arrangement of panels comprising a pair of gusset panels 82a, 82b and a pair of stopper panels 84a, 84b extend between the first and second apertures 56, 86. The pair of gusset panels 82a, 82b each comprise a first gusset panel 82a and a second gusset panel 82b that are separated from one another by a cut line 81. The pair of stopper panels 84a, 84b comprises a first stopper panel 84a and a second stopper panel 84b that are separated from one another by the cut line 81. A first edge of each of the gusset panels 82a, 82b is defined by the first aperture 56 and is disposed adjacent thereto whilst an opposing second edge, which is angled with respect to the first edge, is hinged to a respective one of the stopper panels 84a, 84b by a fold line. Each of the gusset panels 82a, 82b are hinged to the first bottom panel 2 via a fold line. An edge of each stopper panel 84a, 84b, disposed opposite the respective gusset panel 82a, 82b, is defined by and is adjacent to the second aperture 86. Each of the stopper panels 84a, 84b are hinged to the first bevel panel 4 by a respective fold line. The first aperture 56 comprises an edge which is substantially equal in dimension to the combined width of the first and second gusset panels 82a, 82b. First aperture 56 comprises a V shaped recess that extends away from the gusset panels 82a, 82b into the first or second bottom panel 2, 14. This V shaped recess may be engaged by a finger or other machine tool during construction of the carton. The second aperture 86 comprise a substantially rounded edge, disposed proximate edges of the stopper panels 84a, 84b and consequently said edges are curved inwardly of the respective stopper panel 84a, 84b. 
The second bottom locking portion 89, best shown in the enlarged view of FIGS. 3 and 4 comprises a first aperture 56 defined in the first bottom panel 2. Bordering and extending from a proximate edge of the first aperture 56 is a pair of gusset panels 92a, 92b. This pair of gusset panels 92a, 92b comprises a first gusset panel 92a and a second gusset panel 92b that are separated from one another by a outline 60. The gusset panels 92a, 92b are hinged along an edge disposed opposite the outline 60, to the first bottom panel 2 by respective fold lines 63a, 63b. These fold lines 63a, 63b extend from a respective point disposed on an edge of the first aperture 56 to a respective point disposed on the fold line 16 which hinges the first bottom panel 6 to the first bevel panel 4. Opposite the edges of the gusset panels 92a, 92b that border the first aperture 56 are respective angled fold lines 64a, 64b. These angled fold lines 64a, 64b hinge the first 92a and second 92b gusset panels to a respective one of a third and fourth gusset panel 95a, 95b. Third and second gusset panels 95a, 95b extend from these angled fold lines 64a, 64b to the proximate edge of the first bottom panel 2 and terminate in a respective fold line 65a, 65b that interrupts, and is substantially co-axial with, the fold line 16 hinging the first bottom panel 2 to the first bevel panel 4. Optionally, as shown, the fold line 65 may be frangible or a cut line.
First and second stopper panels 94a, 94b are defined within window panels 61a, 61b respectively and are hinged to respective ones of third and fourth gusset panels 95a, 95b along fold lines 65a, 65b. 
Extending from each of the fold lines 65a, 65b that terminate the third and fourth gusset panels 95a, 94b is a respective window panel 61a, 61b; a first window panel 61a is coupled to third gusset panel 95a and a second window panel 61b is coupled to fourth gusset panel 95b. This pair of window panels 61a, 61b extend across the bevel panel 4 and first side panel 6 from the fold line 16 hinging the bevel panel 4 to a base panel to the fold line 20 hinging the first side panel 6 to the top panel 8; so as to extend between the bottom panel 2 and the top panel 8. The window panels 61a, 61b interrupt the fold line 18 hinging the first side panel 6 to the first bevel panel 4.
It will be appreciated that in other embodiments the bevel panels 4, 12 are optional, and that the first and second side panels 6, 10 may extend to fold lines 16, 24 respectively.
The cut line 60 extends from the first bottom panel 2 across the first bevel panel 4 and across the first side panel 6 to terminate at an article retention strap 72. In the embodiment illustrated in FIG. 1 the article retention strap 72 engages a portion of an article B with the carton, best illustrated in FIGS. 2 and 3.
A slit 62a, 62b is formed respectively in each of the first and second window panels 61a, 61b, which slits 62a, 62b extend, from fold line 16, across bevel panel 4, and into side panel 6 where they terminate. The slits 62a, 62b partially separate the first and second window panels 61a, 61b. The slits 61a, 61b are arcuate in shape. The region of the window panels 61a, 61b between the slits 62a, 62b and a distal free edge of the window panel 61a, 61b forms a yieldable tab. The region of the window panels between the slits 62a, 62b and the hinged connection 58a, 58b to the bevel panel 4 comprises a fold line 66a, 66b respectively. Each fold line 66a, 66b is disposed at an angular relationship to the fold line 16 and extends substantially between the fold line 16 and the respective slit 62a, 62b, preferably, from the junction between fold line 16 and fold line 58a, 58b. 
Optionally, the top panel 8 comprises two optional finger apertures 74 that may be utilised by a user to carry the carton.
Hinged to each end of the top panel 8 are top end closure arrangements 31a, 31b. These end closure arrangements 31a, 31b are preferably identical to one another and will be described by reference to top end closure arrangement 31a. Top end closure arrangement 31a comprises an end flap 30a, hinged to the top panel 8 along a fold line 28a. Perpendicular to that fold line 28a, along a first side of the end flap 30a, a first gusset flap 34a is hinged by fold line 44a. The first gusset panel 34a is also hinged to the first side panel 6, by fold line 42. Along a second side of the end flaps 30a, opposite the first, a second gusset flap 36a, is hinged via fold line 45a. The second gusset panel is hinged the second side panel 10, by fold line 46a. 
The blank 11 further comprises a plurality of crown apertures 70 which are V-shaped and which in a set up condition receive an upper portion of an article B.
Each crown aperture 70 is struck in part from a respective side panel 6, 10 and in part from top panel 8, so as to define an arcuate shaped tab which extends over an uppermost portion of a respective article which it receives.
Turning to the construction of the carton as illustrated in FIGS. 2, 3, 4 and 5 it is envisaged that the carton can be formed by a series of sequential folding operations in a straight line machine so that the carton is not required to be rotated or inverted to complete its construction. The folding process is not limited to that described below and may be altered according to particular manufacturing requirements.
A group of articles B is assembled; in the preferred embodiment 6 articles are arranged in a 2×3 array. The top panel of the blank 11 is disposed over the group of articles B to provide a top wall 8 of the carton. Preferably, the following operations of folding to construct the first 80 and second 89 bottom locking arrangements are performed prior to folding the first and second side panels 6, 10 down around the group of articles B to provide side was 6, 10 of the carton.
The folding of the first 80 and second 89 bottom locking arrangements and of the window panels 61a, 61b will now be described. FIG. 4 illustrates the result of these folding operations along one side of the carton, wherein the opposing side and top of the carton are omitted for clarity.
The gusset panels 82a, 82b of the first 80 bottom locking arrangements are folded into substantially flat face contacting relation with the respective one of first or second bottom panel 2, 14. This causes the stopper panels 84a, 84b, of the first bottom locking arrangements 80 to be folded relative to the respective one of the first and second bevel panels 4, 12, thereby to extend away therefrom at an angle thereto. This angle is created by the angle between the fold line hinging to the bottom panel 2, 14 the gusset panel 82a, 82b and fold line hinging the stopper panel 84a, 84b to the bevel panel 2, 12. This folding operation causes apertures to be formed where the gusset panels 82a, 82b have been displaced from panel of material of the first and second bottom panels 2, 14, first and second bevel panels 4, 12 and first and second side panels 6, 10. The stopper panels 82a, 82b curve away from the respective adjacent one of the first and second side panels 6, 10 either side of these apertures, to provide a curved receiving area into which a lower portion of an article B may be received.
The gusset panels 92a, 92b, of the second bottom locking arrangements 89 are folded into substantially flat face contacting relationship with the respective one of first or second bottom panels 2, 14. Stopper panels 94a, 94b are folded upwardly to extend substantially perpendicularly away from the respective one of the first and second bottom panel 2, 14 at an angle to the adjacent first or second bottom panel 12, 14, by virtue of the angle between the fold line hinging the gusset panel 92a, 92b to the bottom panel 2, 14 and the fold line hinging the stopper panels 94a, 94b to the first or second panel 4, 12. In the same manner as described above in relation to the first bottom locking arrangements 80, the stopper panels 94a 94b of the second bottom locking arrangements 89 are struck from the carton to leave an aperture for receiving a lower portion of an article B. In particular, it is contemplated that one or more lower portions, optionally having a petaloid shape, of article B are receivable in the resulting aperture between the stopper panels 94a, 94b. 
The window panels 61a, 61b are folded inwardly of the carton as shown in FIGS. 2 to 5 such that they are interposed between a pair of adjacent articles B. Folding the window panels 61a, 61b in this manner warps the corresponding one of the first or second side panels 6, 10 to which they are attached due to the curved nature of the fold lines 58a, 58b connecting those window panels 61a, 61b to the first or second side panels 6, 10. The warping of the first and second side panels 6, 10 urges the window panels 61a, 61b against the article B, causing deformation of portions thereof that are separated from direct connection to the first or second side panels 6, 10 by a respective one of the slits 62a, 62b. So-deformed, the window panels 61a, 61b each consist of an inboard edge defined by the respective slit 62a, 62b intermediate an outboard edge defined by the cut line 60 and the corresponding one of the first 6 and second 10 side walls. This edge is disposable in a recess in a lower portion of an article received in the second bottom locking arrangement 90, as best shown in FIG. 4.
The first and second side panels 6, 10 are folded down about their respective fold lines 20, 22 into abutment with side portions of adjacent ones of those articles B to form respectively, first and second side walls 6, 10 of the carton. This brings the first bottom locking arrangements 80 of each side wall 6, 10 around proximate lower portions of the articles B and brings the window panels 61a, 61b into interposition between a central article B on an adjacent side of the group, and its neighbouring articles A on that side. The intermediate edge of the window panels 61a, 61b provided by the slit 62a, 62b is inserted into a recess in the lower portion of the article and the contoured edge of each window panel 61a, 61b abuts an upper portion of that article A.
Article retention strap 72 engages an article B in the aperture created by displacement of the window panels 61a, 61b. The article retention strap 72 engages an upper portion of the article B beneath a flange or protrusion provided by an article closure means C such as a crown cork. In the case of articles B (such as those illustrated in FIG. 7) having petaloid lower portions, it is contemplated that a petaloid portion of such an article B be receivable so as to extend through the apertures between the two adjacent stopper panels 84a, 84b of each first bottom locking arrangement 80. The projecting portion of the first aperture 56 provides a shaped edge that optionally abuts an interior side of that petaloid portion. Preferably, the dimension of the aperture measured between the stopper panels 84a, 84b, is selected to prevent the article B from egressing the carton. Lateral movement of the article B in the longitudinal axis of the carton is prevented by the presence of the stopper panels 84a, 84b disposed partially around opposing sides thereof. In the loaded carton, it is contemplated that movement directly away from the stopper panels 84a, 84b is precluded by the presence of an adjacent row of articles similarly engaged by an opposing first bottom locking arrangement 80 in the opposing side wall 6, 10. The intermediate edges of the window panels 61a, 61b are inserted into recesses formed between neighbouring petaloid portions of the articles B, such that one or more on those petaloid portions extend through the aperture formed between the stopper panels 94a, 94b of the second bottom locking arrangement 90. Again this aperture is dimensioned to prevent egress of the articles B therethrough.
It will be appreciated that when the carton is utilised with articles B having a different lower cross section shape to those in FIG. 7, such as a round cross section as illustrated in FIGS. 2 and 5 the bottom locking arrangements 80, 90 engage lower portions of the articles, in particular the stopper panels 84a, 84b, 94a, 94b engage about opposing side of the article B to retain the lower portion in position.
The first and bottom panels 2, 14 are secured in overlapping relationship to provide a bottom wall of the carton by folding the tabs 55 of the first bottom panels 2 into the carton, thereby striking the flaps 54 of the second bottom panel 14. The tabs 55, so inserted, maintain the first and second bottom panels 2, 14 in overlapping relationship. The erected carton is best shown in FIG. 5.
The ends of the carton are at least partially closable, as best shown in FIG. 5, to prevent the articles from being removable therethrough, by folding the gusset panels 34a, 36a of the end closure arrangements into flat face contacting relation with proximate one of the first or second side panels 6, 10. This as a result causes the end flap 30a, 30b to be pulled down to at least partially dose the end of the carton.
The first and second bottom panels 6, 14 are then folded around underneath the group of articles B such that they may be secured one to the other through use of the complementary punch lock formed by the tabs 55 and flaps 54 to form a composite bottom wall 55/54 of the carton.
Crown apertures 70 receive an upper portion of the article as shown in FIG. 5.
Article retention strap 72 prevents the article displayed in the viewing window arrangement 59 from being removed, or unintentionally egressing from the carton. This is particularly useful when the article B is shaped with a tapered neck.
Referring now to FIGS. 6 and 7, there is shown an alternative embodiment of the present invention. In the second illustrated embodiment, like numerals have, where possible, been used to denote like parts, albeit with the addition of the prefix “100” to indicate that these features belong to the second embodiment. The alternative embodiments share many common features with the first embodiment and therefore only the differences from the embodiments illustrated in FIGS. 1 to 5 will be described in any greater detail.
FIG. 6 illustrates a blank 111 according to a second embodiment, wherein blank 111 comprises a linear series of panels consisting of a first bottom panel 102, first lower bevel panel 104, first side panel 106, top panel 108, second side panel 110, second lower bevel panel 112 and second bottom panel 114 hinged one to the next by respective fold lines 116, 118, 120, 122, 124, 126.
Each of the first and second bottom panels 102, 114 comprise two first bottom locking arrangements 180 disposed one either side of a second bottom locking arrangement 189. Each of these first and second bottom locking arrangements 180, 189, substantially corresponds to those of the first preferred embodiment described above. It will be noted that in the second embodiment the fold line 64a, 64b has been omitted.
The viewing window arrangement 159 comprises an article retention strap 190 which substantially interrupts the window panels 161a, 161b into two pairs of hingeable tabs 171a, 171b, 173a, 173b. 
Hinged to each end of the top panel 108 are end closure arrangements 131a, 131b. These end closure arrangements 131a, 131b are preferably identical to one another and will be described by reference to end closure arrangement 131a. End closure arrangement 131a comprises and end flap 130a, hinged to the top panel 108 along a fold line 128a. Perpendicular to that fold line 128a, along a first side of the end flaps 130a, are sequentially hinged a first gusset flap 134a and a first anchor flap 132a via respective fold lines 144a, 142a. The anchor flaps 132a is also hinged along an opposing side to the first side panel 106, by fold lines 148a. Along a second side of the end flaps 130a, opposite the first, are sequentially hinged a second gusset flap 36a, and a second anchor flap 38a via respective fold lines 145a, 146a. The anchor flap 138a is also hinged to the second side panel 10, by fold lines 148a. Aperture 50 is formed intermediate proximate side edges of the first side panel 106 or second side panel 110 and the corresponding ones of the gusset panels 134a, 136a and anchor panels 132a, 138a. 
At an end of the window panels 161a, 161b adjacent a top panel 108 of the blank 111 there is formed a cut out 166 in the adjacent edges thereof. This cut out 166 is defined, on each side, by an edge extending inwardly of each window panel 261a, 261b from a cut line 160 separating the two window panels 261a, 261b. From a terminal point on this edge the window panels 161a, 161b taper away from one another to intersect with terminal points of a small concave cut out in a proximate edge of the top panel 108. The cut out 166 defines in part an engaging edge of the window panels 161a, 161b which in use may engage below a crown cork or other protrusion or flange extending from an article received in the viewing window arrangement 159.
A carton may be set up from the blank 111 through a series of folding operations in substantially the same manner as described above except where specifically provided for below.
Each of window panels 161a, 161b is folded internally of the carton. The lower window panels those located below the article retention strap 190 in use are folded substantially in the manner described above in relation to the first embodiment. It is necessary to fold the upper window panels 161a, 161b out of the plane of the first and second side panels 106, 110, prior to folding the side walls 106, 110 about a group of articles B.
The ends of the carton are at least partially closable, to prevent the articles B from being removable therethrough, by folding the gusset panels 132, 138 of the end closure arrangements into flat face contacting relation with proximate one of the first or second side panels 106, 110. This as a result causes the anchor panels 134, 136 to pull the end flap 130a, 130b down into coplanar relation with the edges of the side walls 106, 110.
The first and second bottom panels 102, 114 are then folded around underneath the group of articles B such that they may be secured one to the other through use of the complementary punch lock formed by the tabs 155 and flaps 154 to form a bottom wall 102, 114 of the carton.
It can be appreciated that various changes may be made within the scope of the present invention, for example, the size and shape of the panels and apertures may be adjusted to accommodate articles of differing size or shape. In other embodiments of the invention it is envisaged that the cut line between the stopper panels and the window panels of the second bottom locking arrangement in fact be a fold line. Also the shape of the fold line connecting the window panels to the side walls may be altered, for example to match the outline of the article to be held in the carton. Similarly, the apertures of the carton (of either embodiment) may be free altered in size and shape to accommodate differing article geometries. The number of articles and their arrangement may be altered.
It is also contemplated that the embodiments described above do not form isolated configurations and that features from one of the embodiments may be freely combined with those of the other of the embodiment as desired. For example the crown apertures 70 may be employed in the second embodiment for one or more articles, for example the outermost articles only or all the articles.
It can be seen from FIG. 7 that the article retention strap 190 substantially bisects the viewing window arrangement 159.
Alternatively, it can be said that the viewing window arrangement 159 comprises four window panels, a first pair located below the article retention strap and a second pair located above the article retention strap 190.
In the illustrated embodiment the article retention strap 190 comprises arcuate edges, which are substantially wave like in shape, in other embodiments the straps are envisaged in particular but not limited to linear edges, for example a horizontal board having linear edges.
In alternative embodiments other panel interlocking means are envisaged including but not limited to adhesive.
In another alternative embodiment, the portion of the article (in the display window) obscured by the retention strap 190 is less in surface area than the portion or portions displayed in the display window.
It will be noted that the top panel 18, 108 is shorter in longitudinal dimension than the bottom panels. This is to provide close proximity of the end closure structure to the upper portion of the articles B, which articles are tapered and have a smaller dimension towards the top than at the base.
In other embodiments when different article shapes are being packaged, including but not limited to substantially parallel sided articles of flanges articles, the top panel may comprise a longitudinal dimension equal or greater that the base.
It will be recognized that as used herein, directional references such as “top”, “bottom”, “front”, “back”, “end”, “side”, “inner”, “outer”, “upper” and “lower” do not limit the respective panels to such orientation, but merely serve to distinguish these panels from one another. Any reference to hinged connection or a fold line should not be construed as necessarily referring to a single fold line only; indeed it is envisaged that hinged connection can be formed from one or more of the following, a short slit, a frangible line or a fold line without departing from the scope of the invention.

## Claims

1. A package comprising a carton and two or more articles received in the carton, the carton comprising a top panel, first and second side panels and a base panel, the top panel being disposed on top of the two or more articles, the base panel being disposed under the two or more articles, the two or more articles including at least one window article, the carton comprising at least one display window in which the at least one window article is displayed, the at least one display window being struck at least in part from at least one of the side panels, the at least one display window is interrupted by a retention strap that engages the at least one window article, the at least one display window being divided by the retention strap into top and bottom portions such that the top portion extends from the retention strap to reach the top panel and receives an upper portion of the at least one window article, wherein the bottom portion of the at least one display window is defined at least in part by at least one window tab hinged to the at least one of the side panels by at least one curved weakened line, the at least one window tab being folded inwardly about the at least one curved weakened line into the carton such that the at least one of the side panels is warped to urge the at least one window tab against the at least one window article, wherein the at least one window tab provides a frame around at least a portion of the at least one window article, a part of the frame being visible through the at least one display window while the at least one window article is displayed in the at least one display window.

2. The package of claim wherein the retention strap obscures from view a portion of the at least one window article, the portion of the at least one window article obscured by the retention strap is less in surface area than the portion displayed in the at least one display window.

3. A carton comprising a top panel hingedly connected to a side panel and a display window struck at least in part from the side panel, the display window being interrupted by a retention strap such that the display window is divided into top and bottom portions wherein the top portion extends from the retention strap to reach to the top panel wherein the bottom portion is defined at least in part by at least one window tab that is connected to the side panel by at least one curved weakened line and inwardly folded into the carton about the at least one curved weakened line such that the side panel is warped to urge the at least one window tab against a window article to be contained by the carton and displayed in the display window, wherein the at least one window tab provides a frame around at least a portion of a window article to be contained by the carton, a part of the frame being visible through the display window when a window article is displayed in the display window.

4. The carton according to claim 3 wherein the retention strap is defined by two spaced cut lines, wherein the at least one curved weakened line terminates on one of the two spaced cut lines and wherein the other of said two-spaced cut lines defines, at least in part, the top portion of the display window.

5. The package according to claim 1 wherein the top portion of the at least one display window is struck in part from the at least one of the side panels and in part from the top panel.

6. The package according to claim 1 wherein the top portion of the at least one display window is defined by a perimeter which is free of connection to any other part of the carton.

7. The package according to claim 1 wherein the at least one curved weakened line is spaced apart from the at least one window article.

8. The package according to claim 1 wherein the at least one of the side panels is free of face contacting relationship with the at least one window article except the retention strap.

9. The package according to claim 1 wherein the at least one window tab comprises two window tabs which are disposed in opposed positions, the at least one curved weakened line comprises two curved weakened lines hingedly connecting the two window tabs to the at least one of the side panels respectively, and a maximum distance between the two curved weakened lines is greater than a maximum lateral size of the at least one window article.

10. The carton according to claim 3 wherein the top portion of the display window is struck in part from the side panel and in part from the top panel.

11. The carton according to claim 3 wherein the top portion of the display window is defined by a perimeter which is free of connection to any other part of the carton.

12. The carton according to claim 3 wherein the at least one window tab comprises two window tabs which are disposed in opposed positions, the at least one curved weakened line comprises two curved weakened lines hingedly connecting the two window tabs to the side panel respectively, and a maximum distance between the two curved weakened lines is greater than a maximum lateral size of a window article to be contained in the carton.