CZ210897A3 - Cardboard - Google Patents

Abstract

A blank (11) for forming a carton for packaging a plurality of articles comprising a series of hingably interconnected top (18,20), first side (14), bottom (12) and second side (16) panels for forming an open ended sleeve capable of receiving said articles, the top and bottom panels being similarly non-rectangularly shaped substantially to correlate with the cross-sectional shape of the array of articles in a plan parallel to said top and bottom panels, wherein a gusset (38d) comprising two hingably connected gusset panels (58,60) connects the first side panel and top or bottom panel which gusset is adapted to facilitate movement of the side panel to correlate with the associated shape of a stowed array of articles during the formation of the carton.

Description

Πb1 and technology

The present invention relates to a carton for wrapping a plurality of articles, such as cans or beverage bottles, and more particularly to a carton. relates to cartons for wrapping multiple rows or layers of product in a fully enclosed carton and cartons for wrapping products in a non-rectangular configuration

A known carton having a top panel and a base in? The octagonal shape is described by the inventor named Chaussadas in U.S. Pat. No. 4,747,485. The carton comprises a plurality of separate panels for closing the sides and ends of the carton. A separate panel is hingedly attached to each of the eight top and base panels. Most of these panels essentially hang only halfway between the associated top and bottom panels and the opposite top and bottom panels, and is it? the associated panel hanging from the opposite top or bottom panel is overlapped. Therefore, when assembling different panels, a relatively complicated folding method is required, which should result in the closure shown in US 4,747,485.

SUMMARY OF THE INVENTION

The present invention seeks to eliminate or at least alleviate the various problems of cartons known in the art. According to one feature of the present invention, a blank for folding a carton for wrapping a plurality of articles is provided, comprising a plurality of hinged panels to form a top, bottom and sides in the form of an open end box into which said articles such as the top panel said lower panel having a similarly non-rectangular shape so that both of said panels substantially correspond to the cross-sectional shape of the article arrangement in a plane parallel to said top panel and said bottom panel, wherein said side panels comprise a plurality of bending regions which are adapted to be able to bend in at least three different planes, thereby allowing the side panels to be adapted to both the associated top panel and the bottom panel, wherein a reinforcement comprising two hinged panels attaches the first side panel between light bending areas and top and bottom panels.

The preformed carton blank comprises two stiffeners between the first side panel and the top and bottom panels, which stiffeners cooperate with associated end portions of the first side panel to induce its movement during folding of the carton. Two stiffeners can attach, both sides of the panels to the top panel, and two stiffeners attach both sides of the panels to the bottom panel.

Each bending region may comprise a plurality of hinged parts, and these hinged parts may be separated by curvilinear parts that form rounded corners of the composite carbon.

One of the reinforcing panels may have a protruding tab for easier insertion of the tab into the carton during folding. One of the reinforcing panels may also include. means such as an edge that rests on the end of the carton to help maintain. an associated side panel in its collapsed position in the carton. Said protruding tab preferably comprises said abutting edge. Another feature of the present invention is to provide a preform for forming a carton of a package comprising a plurality of products, the preform comprising a hinged link panel assembly to form an open-end carton into which said products can be inserted. the two opposing main panels are similarly non-rectilinear in shape to substantially correspond to the cross-sectional shape of the article configuration, the plane of which is substantially parallel to the two opposing panels, and the two other main panels comprise a plurality of bending regions adapted to bending in at least three different planes to allow the two other main panels to be adapted to the associated ones. opposing panels, wherein a reinforcement comprising two hinged panels attaches the first main panel between adjacent bending regions and one of its opposing major panels.

Advantageously, an opening facilitating folding may be formed in the reinforcement, and the reinforcement may comprise means for closing said opening when the carton is folded. Further features of the invention relate to carton and carton folding.

Popi with pictures on the drawing

Embodiments of the invention will now be described solely by way of example description with reference to the accompanying drawing, in which:

Giant. 1 is a plan view of a blank for folding a carton according to a first embodiment of the present invention.

Giant. 2 to 6 show different views of the blank of FIG. 1 during the carton folding process shown in FIGS. 7 and 8.

Giant. 7 and 8 are perspective views of a folded carton according to a first embodiment of the present invention. 9 is a plan view of a blank for folding a carton according to a second embodiment of the present invention.

Giant. 10 to 14 are perspective views of a carton according to a second embodiment of the present invention.

Giant. 15 is a plan view of a blank for folding a carton according to a third embodiment of the present invention.

Giant. 16 to 21 are various perspective views of a carton according to a third embodiment of the present invention.

Giant. 22 is a plan view of a blank for folding a carton according to a fourth embodiment of the present invention.

Giant. Figures 23 to 28 show views of various stages of folding carton from the blank blank shown in Fig. 22.

Giant. 29 is a perspective view of a carton comprised of the blank blank shown in FIG. 22.

Giant. 30 is a schematic representation of the method of filling and closing the carton shown in FIG. 29.

DETAILED DESCRIPTION OF THE INVENTION

A first embodiment of the present invention is shown in Figures 1 to 8, wherein a carton 10 comprised of a blank 10 for folding the carton 10 is shown in Figures 7 and 8. The carton is designed to maintain a non-rectangular configuration of articles such as an arrangement comprising rows of two, three and two articles and having a horizontal cross-sectional shape substantially in the form of a hexagon. Since products such as cans or bottles are generally cylindrical or have at least rounded sides in the case of bottles, this hexagonal arrangement also has rounded corners. In order to firmly fold such an arrangement, the carton 10 has bendable side panels. The carton 10 may hold one higher article assembly or two article assemblies in a stacked configuration. Of course, multiple product trays may also be positioned by simply adjusting the length of the side panels of the carton to meet the requirements regarding the height of a predetermined number of trays.

The blank blank 11 is a base panel 12 which is hingedly attached to end tabs 22 and 20 and to side panels 14 and 16 via fold lines 56a and 56b and stiffening panels 40a, 40b, 40c and 40d as shown in FIG. Both the side panel 14 and the side panel 16 comprise respective rows of side panel portions 42a and 42b, 46a and 46b, 50a. and 50b, and 54.a and 54b. The side panel portions are separated from each other by the bendable panel portions 44a and 44b, 48a and 48b, and 52 and 52b. The bendable panel portions comprise a plurality of fold lines that allow a certain amount of bending of each panel portion to bend the side panels 14 and 16 around the wrapped products in an arc manner so as to be completely wrapped by the sides of the carton. Therefore, the cardboard has a polygonal shape, in this case a hexagon, with curved or rounded corners in a cross-section taken along a horizontal plane.

The side panels 14 and 16 are respectively hingably attached to the first top panel 18 and the second top panel 20.

Said top panels 18l are hingedly connected to respective side panels 14 and 16 via reinforcements Bila, 38b, 88c and 88d and fold lines 64a and 64b. The top panels are overlap type panels and the legs may be joined together using adhesive or cooperating locking means such as tabs and openings. The top panel comprises end tabs 26b and 28b that are hingedly attached thereto along the respective ad 25d. The indentation features 33c and 33d are the line between the first top panel 10 of the folding lines 25c on the folding and each of the end tabs 26b and 28b, but in other embodiments may or may not be formed. loops and first only one such notch sign, no such notch sign. allow the fold line to be bent by the top panel when a handle is used, as will be described later. The handle 30 is formed on the second top panel 20 and the strap has its tabs 32 flexibly attached to said tape and foldably attached to the end tabs 26a and 28 and respective fold lines 25a and 25b, and in this example 1 and through the fingers which are the second top panel along the side notches 33a and 33b, the handle reinforcement example is hingably connected to the fold lines 34.

Each of the stiffeners 38a, 38b, to the end tabs 26a and 28a, the second top panel 20 also includes a panel 36 which, in this handle band 30 along the 38a and 38d, may, as shown in FIG. hingedly connected to the nearest panel 60. A notch 62 may be used to separate a portion of the panel 58 from the panel 60 and the associated top panel 18 or 20. The notch 62 may usefully define a protrusion 59 from the outermost reinforcement panel 58, which protrusion or folding means may be used to retain the reinforcement inside the carton, thereby helping to fold the sides of the carton. The lower reinforcements 40a, 40b, 40c and 40d could be formed in the same way, but here each comprises two symmetrical panels which are hingedly connected to each other along the fold line 41 ..

A method of folding the blank 11 into the form of a complete carton 10 shown in Figs. 7 and 8 is shown in Figs. 2-6. First, the first top panel 18 may be folded along the fold line 64b to be laid on the side panels. The reinforcement panel can then be folded along the fold line 34 below the handle strip 30, thereby forming a two-layer handle and thereby also strengthening the handle. The side panel 16 and the second top panel 20 may then be folded along the hinge line 56a into the shape shown in FIG. 3. Subsequently, it is possible to attach the first top panel to the second top panel, for example by gluing overlapping portions or using cooperating locking means (not shown). there are locking tabs and holes. Other panels that allow the formation of a cylindrical box may be used as overlapping panels.

The handle edges of the incisions or notches 33a and 33b substantially follow the notch features 33c and 33d in the first top panel 18 to allow the hinge or fold portions 25a, 25b, 25c and 25d to move between the top panels a and 26b, 28b. This allows the end tabs 16a, 20a to use upward springing of the handle strip 30 due to the inward movement of the portion of the handle strip adjacent the ends of the carton. To assist this movement, for example, a pair of side folding or folding lines 35c and 35d may be formed in the first top panel 18, as shown in FIG. 2. In this example, both folding lines 35c, 35d and associated portions of folding lines 25c, 25d which are directed across the deflectable portion extending between the end tab and the top panel, assist in said deflection inward when a handle 30 is used.

Thereafter, the folded blank may be opened to form a box-like structure as shown in Fig. 4. In summer form, products such as cans may be inserted into the partially folded carton 10 by its open ends. After insertion of the articles, the end tabs 22 and 24 may be bent upward while the end tabs 26a, 26b, 28a, and 28b may be bent downward. Subsequently, the side panels 14 and 16 may be folded around the articles to close the ends. For example, the reinforcements 38a, 38b, 38c and 38d may be. to a position below the associated top panel 18 or 20 and / or panel 60 of one or more stiffeners

38. The folding of the gussets 38a, 38d _and F downward causes the ends of the carton. folded by pressing the panel 5f of the side panels 14 and 16 close at the ends of the carton 10. A similar downward folding of the stiffeners 40a to 40d relative to the carton 10 may cause the bottom of the side panels 14 and 16 to rotate so as to close the ends of the carton.

The associated outermost end portions of the side panels 1.4 and 16 are thus brought into an overlapping relationship as shown in FIG. 7. To keep the carton in a closed form, the outermost end portions 54a and 54b may be secured to each other, for example by gluing or using cooperating locking means such as locks and openings. Either one or both of the outermost end portions 54a and 54b may be attached to either one or both end tabs 26 and and / or 26b or to the end tab 22. In this sense, the different overlapping portions may be secured together. Similarly, the opposite ends of the carton may be held in the closed position to form the completely closed carton 10 shown in Figures 7 and 8.

It is entirely and well within the scope of the present invention that the carton 10 has firmly closed the hinged assembly while it is structurally designed to accommodate the products, and to this end has to bend 1 side panels that encircle said products. The carton creates an aesthetic impression by having a suitably shaped top and bottom panels that follow a non-rectangular shape and add to the esthetic features of the products. Of course, non-rectangular assemblies such as, for example, triangular, rhombic, rhomboidal and octagonal arrangements could be used.

A second embodiment of the carton 110 of the present invention is shown in Figs. 9-14. In this embodiment, features or components similar to those described in the first embodiment are designated with the same two-digit reference numbers, with the number 1 being added before the two-digit. Thus, the first top panel 11B is hingably attached to the side panel 114, which is further hingedly attached to the base panel 112. The base panel 112 is attached to the second side panel 116 to the second top panel 120 in analogy to the handle notches 133 substantially which is They buy their money

135c may be of the foregoing embodiment, but the fold lines may be formed to delimit the displaceability in the

a portion following the respective fold lines 125c and 125d between the top panel 11i! and the respective end panels 126b and 1281. Both internally and externally, these lines * designated by reference numeral 135_c may be score lines, thereby creating an opening 131c at the fold lines between the first top panel 118 and the end panels 126b and 128b.

In the side panels 11.4 and 116, the central bendable portions described in the first embodiment are replaced by the central panel portions 148a and 148b, _{and the} other side panel portions can be simply hingedly connected by a single fold line. In this embodiment, the side panels are configured to wrap the sides of the article assembly and completely enclose their sides. However, the base panel 112 and the top panel formed by panels 118 and 120. they do not have completely rounded corners, but their shape is an irregular octagon. In this example, there is an intention to place an assembly with rows of one, two, two and one product on one or each floor. The shown blank 111 is adapted to retain two levels or layering of such assemblies, e.g. cans.

The annual panels are hingedly attached to the associated top panel by stiffeners 138, which may include a main panel 1.58., Which, for example, is hingedly attached to the associated side panel 114 and 116, and the small panel 160 is hinged to both the main reinforcement panel. an associated top panel 116 or 120 may be used to separate a portion of the panel 158 from the p.im 160 and the associated top panel 118 or 120 to use a broken notch 162. This notch 162 may usefully define a protrusion 159 which may be used to press the reinforcement 138 positions between the associated top panel 118 or 120 and the articles within the carton 11.0. In other words, this means that the shape of the reinforcement panels is structurally designed. to assist in folding the side panels in closing the carton after filling. Also, the edge 157 formed here 11a of each main reinforcement panel 158 cooperates in folding the carton with the end panel 126 or 128 to maintain the molded shape of the side panels.

All side panels 114 and 116 in this example have removable portions 1.70a and 1.70b. These portions may be prepared on the carton blank in part to a minimum according to FIG. The removable portions 170 may include means to assist in the removal of the portion from the carton, such as finger openings 172. These finger openings can be closed by hinge tab parts until use.

The carton 110 may be formed by folding the blank 111 in a manner that is substantially similar to what has been said in relation to the first embodiment. Thus, the top panel 118 may be folded along the fold line 164b, the side panel 116 and the top panel 120 may be folded along the fold line 156a, and then the overlapping portions of the top panels may be secured together. Sweat? may be. a cardboard box is formed which is folded by the end panels before bending the side panels 114 and 116 and closing the ends

122, 124

126a, 128a, 126a

128a, 126b and 1.28b according to their respective folding lines filled with products.

The opening 1 of the opening carton 110. In FIG.

The parts without advantageously allow the product to be removed and the 11 and 11 is shown when it? The opening and closing portions 172b may be opened by tearing the tear line 174 and opening the line 1 53 b. 158 and 160c of the line 170b, panel 170b.

panel 170b according to? folding between the reinforcement panels created tear openings to open it

In addition, in the reinforcement? 1.38c (see Figure 9) can? be that allows complete?

In FIG. be seen that the carton 110 can?

wrap two product layers, which may be separated, for example, by a partition panel 176. In order to gain access to a lower product layer, a second openable or removable portion 170a may be formed. When opening them? the opening portion 170a is folded according to the hinge? line 143 while tear-off marking 174 and tear line fold 141b between the reinforcement panels 140b are torn (see FIG. 9). Of course, the stiffeners should be designed to allow complete » opening openable panels without the need for additional tear-off markings such as the aforementioned * lines 16.1c or

In this example, in addition, the reinforcement panels 138 are folded below the associated top panel by folding the reinforcement panels 158 and 160 relative to each other along the fold line 161 so that both parts are folded under the top panel. Thus, the main reinforcement panel 158 may lie adjacent the fold line 125 between the end panels 126a, 126b, 128a, or 128b at their edge 157, thereby strengthening the fold line between the side panels and upwardly to the handle band and positively effecting the sidewall shape. 1 sir.

Referring now to the blank and carton shown in Figures 15 to 20, a third embodiment of a carton according to the present invention will now be described. In this example of the present invention, features or components similar to those described in the first two embodiments are identified by the same two-digit reference numbers, with the number 2 being added in front of the two digits. Thus, the first top panel 218 is hingedly attached to the side panel. 214, which is further hingedly attached to the base panel 212. The second side panel 216 is hingedly attached to both the base panel 212 and the second top panel 220. The side panels 214 and 216 are substantially similar to those of the side panels shown in FIG. 9 and correspondingly described, and have a different configuration only in connection with the solution of the openable (and / or removable) portions 270. In this example, the deburrer is shown in FIG. The line 274 extends substantially along three sides of the rectangular panel forming the removable portion 270. The opening portions 270a and 270b are hingedly coupled to the fourth side according to respective fold lines 239b and 237c. Each of these fold lines connects the openable portions 270a and 270b to the associated stiffening panel, in this case namely the respective stiffening panel 240b and 238c.

The opening 270b may be folded according to the fold line 237c on the assembled carton shown in Fig. 17. The portion 270b may be removed by peeling along the fold line 261c as shown in Fig. 18 so that the top ply products A can be removed 19. The lower opening portion 270a can similarly be folded open along the fold line 239b.

Also, the portion 270a can be completely removed by tearing, for example, along the fold line 241b.

In this example, the carton 210 is adapted to wrap three product layouts, each of which is formed by a carton. layering contains? assembly of rows of one, two, two and one product. Is it obviously possible to wrap different numbers of hints with different numbers of products and also different number of layering can? be placed inside the carton after making appropriate adjustments to the burr blank described herein.

A fourth embodiment of the preform 313 and the carton 3.10 formed therefrom is shown in Figs. 22-30. The folded carton 310 shown in Fig. 29 has an overall octagonal cross-section in a horizontal plane and is designed to wrap a single-layer product assembly. , such as bottles, in an arrangement of tri, four, four and three products in a row.

The preform 311 comprises a top panel 320 which is hingedly connected to the side panel 316 according to the fold line 3f '4a. Further, the side panel 316 is hingably attached to the base panel having an octagonal shape. The base panel 3.1.2 ΐθ is connected to the second side panel 3'14 according to the fold line 356b. In this embodiment, instead of forming the overlapping object of the blank forming panels into a tubular, box-like structure, a tab 315. is applied to the tab 31.5, which is hinged to the top panel 320 according to the fold line 364b, attached to the top panel 320. the top of the side panel, for example by gluing or using locking means, such as locking

311 includes a handle 330 having a handle 82 in a top panel 320 which is hingedly connected to a 32.8 in the case, and 32.8 which are hingedly attached to the top panel. In addition, the top panel 320 may be provided with divergent lines forming for relieving the pressures when the handle of this embodiment are openable markings 370 formed in the top panel 320.

The opening markers 370 follow the openings defined by the grip tabs 332 that form part of the handle 330 and have tabs and openings.

Cross-section Workpiece> Tie loop 3.3.6 to end panels 326 T o r ρ a nr? hi 320. folding, 380 spacing markings are used. Lateral tear lines similar to lines 274 and 174 which have already been shown in connection with the second and third embodiments. When attaching the tab 315 to the side panel 314, four effective reinforcements 338 are formed between the top panel 320 and the side panels of the carton. The reinforcements 338 are the same in this example and with reference to the reinforcement 338a it can be seen that they comprise a main panel 358a. which is hingedly connected to the side panel 3.16. The main panel 358a is hingedly attached to a small panel 360a, which is further hingedly attached to the top panel 320. The main reinforcement panel 358a comprises a protruding tab 359a that can be used to close the carton and keep the associated sidewalls in a rounded shape due to cooperation between e.g. edge 357a and tab 359a and end panel 328 - This work will become more apparent in conjunction with other drawings. In addition, the stiffening panel 358 may be positioned between an associated, for example, corner top of the article, such as a bottle stopper, and the top panel 320. This may help protect each orifice at the top of the carton while folding despite a hole 363 formed by the stiffening.

The side walls 316 and 314 are uniform and comprise a main center panel having a respective center fold line 883a and 383b, which allows the two sides of the panels to be folded substantially in half. This is advantageous in preparing the possibility of erecting the partially folded carton shown in Fig. 25 into a carton-like structure shown in Fig. 26 and into which the articles can be inserted. The intermediate fold lines 385a and 385b extend to the side panel portions 346a, 350a, 346b and 350b. In addition, at each fold line 385 of the lateral portions of the side panels. These panel supports 386 provide a panel 386 for better wrapping of the sides and ends of the inserts and the sloping top portions of the side panels which can be seen in FIGS. the end fold lines 323a and 323b also formed in the respective lower end, it will be appreciated that in order to make the top panel 320 smaller, as in the left panels 324 and 322. The trunk top is also octagonal than the base panel 312.

other embodiments may be. reinforcements 340 are formed between the base panel 3.12 and the side panels.

Beyond the fold of the carton 310, the stiffening strip 336 is folded along the fold line 331, f. 23. This aligns the 382 in the lane 336 with the fold lines 325a and 325b, thereby minimizing any interference with the folding of the upper end panels 328 and 326 along the fold line 325a and 325b when the ends are Further, both the top panel 320 and the side panel 3.16 are folded along the fold line 385a to the position shown in Figure 24. The upper portion of the side panel 314 is then folded along the fold line 385b to touch the tab. The blanks 311 can usually be stored in this flat form and transported to the packaging mechanism as packaging materials that are ready to be placed in suitable containers. 30, as shown in FIG. 30.

In order to be able to insert the articles into the carton structure shown in Fig. 25, it is erected in a box-like form, first the carton as shown in Fig. 26.

i Η! AND!

It is also shown in the initial part of the packaging process shown in the movement diagram, in the diagrams to date that the two-row formations are driven, it being understood that the carton of the direction of operation indicated by the drawing can be seen. into which are inserted two inner rows of four products and two adjacent outer rows of three products. The outer rows are slightly shifted with respect to the inner row, so the rows with the arrow F. On this, in phase A they are The articles are positioned so as to form a relatively tightly wrapped assembly. This means that one product in the outer row relies on two products in the inner row. This does not apply to the contact of the two inner rows after they have been placed in the carton during the phase marked with D in Fig. 30. Adjacent inner rows of four products are only leaning on each other so that one product rests on the adjacent product of the adjacent inner row.

Of course, it would be possible to create differently assembled product assemblies in the carton for different dimensions or bends.

After the carton 320 has been filled, the reinforcements 338 and 340 are bent inwards as they pass through the processing section C. The ring Π in FIG. 30 shows that the main reinforcement panel 358c is folded inwardly to a position below the top panel 320. as shown in the ring H in FIG. 30. This bending of the stiffeners causes the side panels to be bent towards the part 11 closed with the t 11 shown in FIG. The extended end portion of the side panels 3.50a and 350b can then be further pulled around the ends of the carton as in the videos.

This causes further rounding of the side panels 314. and 31.6, which products and fit the base panel 312 thus copy the sides adjacent to the shape of the three sides of the octagonal and top panels 320. In addition, the upper portions of the side panels 314. and 316 are slanted. or bending inward to copy the extension under the neck of the bottles stored in the carton.

The upper and lower end panels 322, 324, 328 and 326 are then folded along the associated fold line to the upper or lower panel as shown in Fig. 28 - Associated upper and lower end panels such as panels 328 and 322 may then be attached glued together. Alternatively, cooperating locking means such as locking tabs and openings may be used for this purpose. The end panels may also be attached to the end panels 346a, 346b, 350a and 350b. If adhesives are used as glue, then the assembled carton shown in Fig. 29 may be compressed in section E of Fig. 30 to make sure that the panels remain closed.

Claims (7)

U RIGHT E N E PATENTOVÉ CLAIMS i Ni10 Ni SVÍ Λ T ^J 3AP SAIAiOdd Ci 7fct Cl OF. 5 XI s o carton both 1 u u> l 2 Π Q I hang up A blank blank for folding a plurality of articles comprising an interconnected top, first side, bottom, and second side panel 9 to form an open ion box having the ability to receive said articles, wherein the top panel and bottom panel have a similar non-rectangular shape substantially corresponding to a cross-sectional shape of the article assembly in a plane which is horizontal with respect to said top panel and said bottom panel, characterized in that each of said side panels comprises a number of bending regions. This means that they are at a certain distance The side panels are spaced apart from one another by positioning the regions extending between the bending at least three different planes to accommodate said side panel to the shape of the associated top and / or bottom panels, the stiffening comprising two hinged reinforcement panels connect said side panel regions to the respective panel 11. vrchu ímu 2. A carton folding blank according to claim 1, wherein the contents are two stiffeners that are connected between said areas of said side panels and the respective top or bottom panels, wherein the stiffeners cooperate with associated end portions of the first side panel so as to induce its movement during folding of the carton. 3. The carton blank according to claim 2, wherein two stiffeners attach both side panels to the top panel and two stiffeners attach both side panels to the bottom panel. A blank for folding a carton according to any one of the preceding claims, wherein claims 1 to 3, wherein each bending region comprises a series of hinged parts of the blank. 4, hinged for folding carton, characterized in that the parts are separated by curvilinear parts that form rounded corners on the assembled carton. A blank for folding a carton according to any of the preceding claims, wherein claims 1 to 5, characterized in that one of the stiffening panels comprises a tab extending therefrom to facilitate the folding of one reinforcement inside the carton during its folding. A blank for folding carton according to any one of the preceding claims, wherein one reinforcing panel has a touch edge that effectively contacts the end of the carton to help maintain the associated side panel in its formed position in carton. 8. Blank blank for folding cardboard according to? claim 6 and 7, the protruding tab having said touch edge recene A blank for folding cardboard according to any one of the preceding claims, in which it facilitates folding of the reinforcement of claims 1 to 8, wherein the reinforcement has an associated opening which 10. The carton blank according to claim 9, wherein the reinforcement comprises protruding means for closing the opening when the carton is folded.