WO2014024067A2

WO2014024067A2 - Packet for tobacco products

Info

Publication number: WO2014024067A2
Application number: PCT/IB2013/055876
Authority: WO
Inventors: Giuseppe Marchitto; Stefano Negrini
Original assignee: G.D S.P.A.
Priority date: 2012-08-06
Filing date: 2013-07-17
Publication date: 2014-02-13
Also published as: ITBO20120434A1; KR20150040915A; RU2014153263A; JP2015524372A; WO2014024067A3; EP2879963A2; CN104540742A; KR102109068B1; RU2635041C2; CN104540742B; JP6301925B2; IN2014MN02480A

Abstract

Described is a packet for tobacco products, having a longitudinal axis (A) of main extension and four side walls (2, 3, 4, 5), which define a front wall (2), a rear wall (3) and a pair of sides (4, 5), a bottom wall (6) and a top wall (7); each side wall (4, 5) is joined to the front wall (2) and to the rear wall (3) by respective connecting edges (8, 9, 10, 11); along each of the above-mentioned connecting edges (8, 9, 10, 11) there is at least one corner wall (17) which has a transversal dimension variable along a direction parallel to the longitudinal axis (A) and is defined by respective side edges (18) which extend diverging from at least one first shared vertex (19), provided along the edge (8, 9, 10, 11) of the packet (1), and converging at least on a second shared vertex (20), also provided along the same edge (8, 9, 10, 11); the side edges (18) define for each side wall (2, 3, 4, 5), at least limited to the above-mentioned portion touched by the side edges (18) of the corner walls (17) and between these side edges (18), a deformation which extends towards the outside of the edge of the packet (1) in such a way as to keep substantially constant the perimeter extension of each transversal section of the packet (1) executed transversely to the longitudinal axis (A).

Description

PACKET FOR TOBACCO PRODUCTS

Technical field

This invention relates to a packet for tobacco products.

Hereinafter in this description, reference is made in particular and by way of example to hard cigarette packets, but without thereby limiting the scope of the invention.

Background art

A prior art hard cigarette packet is obtained by folding one or more pre- weakened and pre-creased flat paperboard blanks and it mainly comprises a container open at one end, a lid, hinged to an end edge of the container, and a collar fixed inside the container.

Generally, the conventional hard packets extend along a main longitudinal axis and comprise a front wall, a rear wall, two sides, a top wall and a bottom wall. The front wall and the rear wall are connected to two sides by respective edges (with sharp corners or rounded or bevelled), parallel to the main longitudinal axis of extension.

In order to make the conventional hard packets more attractive from an aesthetic point of view the shape of the packet was varied and, in particular, the shape of the above-mentioned edges connecting the front wall and the rear wall with the respective sides.

However, a variation in the shape of the above-mentioned parallel edges could result in a variation to the outer perimeter of the packet along a section transversal to the main longitudinal axis of extension, resulting in various drawbacks from a point of view of packaging the packet.

Disclosure of the invention

The aim of this invention is to provide a cigarette packet which can overcome the above mentioned drawback, that is to say, provide a packet which forms a particular shape of the relative longitudinal edges, parallel to the main axis of extension, whilst keeping an outer perimeter equal to the perimeter of a conventional packet.

The invention accordingly provides a cigarette packet comprising the features set out in the the independent claim 1 .

Brief description of drawings

The invention is described below with reference to the accompanying drawings, which illustrate a non-limiting embodiment of it, and in which: - Figure 1 is a perspective view of a first embodiment of a packet according to this invention in a closed configuration;

- Figure 2 is a perspective view of the packet of Figure 1 , in an open configuration;

- Figure 3 is a perspective view of a detail from Figure 2;

- Figure 4 is a perspective view of a second embodiment of the packet according to this invention in a closed configuration;

- Figure 5 is a perspective view of a third embodiment of the packet according to this invention in a closed configuration;

- Figure 6 is a side view of the packet of Figure 5;

- Figure 7 is a perspective view of a fourth embodiment of the packet according to this invention in a closed configuration;

- Figure 8 is a perspective view of a fifth embodiment of the packet according to this invention in a closed configuration;

- Figure 9 is a plan view of a first flat blank used to make the packet of Figure 1 ;

- Figure 10 is a plan view of a second flat blank used to make the packet of Figure 1 ;

- Figure 1 1 is a plan view of a first flat blank used to make the packet of Figure 4;

- Figure 12 is a plan view of a second flat blank used to make the packet of Figure 4; - Figure 13 is a plan view of a first flat blank used to make the packet of Figure 5;

- Figure 14 is a plan view of a second flat blank used to make the packet of Figure 5;

- Figure 15 is a plan view of a first flat blank used to make the packet of Figure 7;

- Figure 16 is a plan view of a second flat blank used to make the packet of Figure 7;

- Figure 17 is a plan view of a first flat blank used to make the packet of Figure 8;

- Figure 18 is a plan view of a second flat blank used to make the packet of Figure 8;

Detailed description of preferred embodiments of the invention

The numeral 1 denotes in its entirety a packet substantially in the shape of a parallelepiped, in particular with rectangular cross section, and the main longitudinal axis of extension of which is labelled A.

The packet 1 comprises four lateral walls defining a front wall 2, a rear wall

3 and a pair of sides 4 and 5.

More specifically, the front wall 2 and the rear wall 3 are two larger lateral walls with respect to sides 4 and 5 which are two smaller lateral walls.

Moreover, the packet 1 comprises a bottom wall 6 and a top wall 7.

Each side 4 and 5 of the packet 1 is joined to the front wall 2 and to the rear wall 3 by connecting edges 8, 9, 10, 1 1 .

More specifically, numerals 8 and 9 identify the connecting edges of the front wall 2 with the sides 4 and 5, respectively, and numerals 10 and 1 1 identify the connecting edges of the rear wall 3 with the sides 4 and 5, respectively.

The packet 1 comprises a container 12 for housing a group of cigarettes 13 and a lid 14 hinged to the container 12 along a hinge line 15.

The hinge line 15 is positioned at the rear wall 3 and allows the packet 1 to pass from a closed position to an open position, and vice versa, by rotating the lid 14 about the hinge line 15.

A collar 16 is fixed inside the container 12 at least at the front wall 2.

Preferably, the collar 16 is fixed inside the container 12 at the front wall 2 and at the sides 4 and 5.

It should be noted that the different embodiments of the packet 1 shown in Figures 1 to 8 have common technical characteristics which are below and which will be subsequently be referred to with the numerals introduced below.

More specifically, the packet 1 comprises along each of the connecting edges 8, 9, 10, 1 1 at least one corner wall 17 which has a transversal dimension variable along a direction parallel to the longitudinal axis A. Each corner wall 17 is defined by relative side edges 18 which extend diverging from at least one first shared vertex 19, provided along the respective connecting edge 8, 9, 10 and 1 1 , and converging at least on one second shared vertex 20, also provided along the same connecting edge 8, 9, 10 and 1 1 .

The side edges 18 of the corner walls 17, adjacent to the front wall 2 and to the two sides 4 and 5, extend at least along a portion respectively of the front wall 2 and of each of the two sides 4 and 5.

The side edges 18 of the corner walls 17, adjacent to the rear wall 3 and to the two sides 4 and 5, extend at least along a portion respectively of the rear wall 3 and of each of the two sides 4 and 5.

In this way, the above-mentioned connecting edges 8, 9, 10, 1 1 define, for each lateral wall 3, 4, 5 and 6, at least limited to the above-mentioned portion touched by the side edges 18 of the corner walls 17 and between the side edges 18 of two adjacent corner walls 17 and at the same level with respect to the longitudinal axis A, a deformation which extends towards the the outside of the edge of the packet 1 .

The deformation towards the outside of the packet 1 , compensates the deformation generated by each corrner wall 17, in this way keeping the perimeter extension of each transversal section of the packet 1 executed transversely to the longitudinal axis A substantially constant.

With particular reference to the first, second, third and fourth embodiment of the packet 1 , shown in Figures 1 to 7, each corner wall 17 comprises a first and a second panel 21 and 22, substantially triangular in shape, each of the which starts from the respective first and second vertex 19 and 20 and both converging towards the inside of the packet 1 until joining along a shared base 23, transversal to the respective connecting edge 8, 9, 10 and 1 1 of the packet 1 , defined by a first crease line 24.

Preferably, the first and second panels 21 and 22 are isosceles triangles and each have two sides of the same extension, respectively 21 a and 22a, and the shared base 23.

More specifically, each side 21 a of the first triangular panel 21 encounters a corresponding triangular side 22a of the second panel 22 at respective third vertices 25, located at the ends of the shared base 23.

It should be noted that the sides 21 a and 22a of the first and second panel 21 and 22 define the side edges 18 of each corner wall 17.

Consequently, each corner wall 17 extends from the first vertex 19 to the third vertices 25 and from the third vertices 25 to the second vertex 20. The third vertices 25 of each of the corner walls 17, positioned along respective connecting edges 8, 9, 10 and 1 1 , are joined together by a crease line 26 which extends transversely to the axis A of the packet 1 , on each portion of the front wall 2, of the rear wall 3 and of the two sides 4 and 5, touched by the side edges 18 of the corner walls 17.

The first and second crease lines 24 and 26 are joined together at the third vertices 25 for the entire transversal extension of the packet 1 .

More specifically, the first and the second crease lines 24 and 26 join the third vertices 25 of the corner walls 17 positioned along a respective connecting edge 8, 9, 10, 1 1 and at the same level along the longitudinal axis A.

So as to keep constant the outer perimeter of the packet 1 at a cross section transversal to the longitudinal axis A and the third vertices 25, the first crease lines 24 of each corner wall 17 have the same extension.

The second crease line 26 defines on each side wall 2, 3, 4 and 5 a cusp 27 facing towards the outside of the edge of the packet 1 .

Each cusp 27 is obtained from respective third and fourth panels 33 and 34 which are flat and mutually inclined to each other. The deformation towards the outside, obtained by the relative inclination between the third and the fourth panel 33 and 34, defining a cusp 27, compensates the inclination towards the inside of the first and the second panel 21 and 22 which coverge together along the first crease line 24.

The third panels 33 and the fourth panels 34 are positioned, respectively, between the first and the second panels 21 and 22 of the corner walls 17 positioned at the same level along the longitudinal axis A along a respective connecting edge 8, 9, 10 and 1 1 .

Alternatively to the corner walls 17 comprising, respectively, a first and a second triangular panel 21 and 22, each corner wall 17 of the packet 1 comprises a lenticular panel 28 concave towards the inside of the packet 1 the side edges 18 of which are curvilinear arc-shaped, as shown in Figure 8.

In this embodiment, each portion of the front wall 2, of the rear wall 3 and of the two side walls 4, and 5 touched by the curvilinear arc-shaped side edges 18 of the corner walls 17 is convex towards the outside of the packet 1 .

In order to keep the packet 1 in the closed condition, to maintain the integrity and the aroma of the cigarettes of the group 13, the collar 16 comprises at least two corner walls 17 each designed to engage with a respective corner wall 17 positioned at the lid 14, along a respective connecting edge 8 and 9.

More specifically, the inner face of the corner walls 17 positioned at the lid 14 mates with the outer face of the corner walls 17 of the collar 16 to prevent the spontaneous opening of the packet 1 . In effect, the corner walls 17 positioned at the lid 14 have their inner faces relatively convex with respect to the outer faces of the corner walls 17 of the collar 16, which face towards the inside of the packet 1 , in such a way that they can mutually couple.

Preferably, so as to facilitate the coupling of the corner walls 17 of the lid 14 and of the collar 16 during rotation of the lid 14 about the hinge line 15, the corner walls 17 of the collar 16 are bevelled, that is, they are without one of either the first and the second vertex 19 and 20.

Figures 1 to 3 show a first embodiment of the packet 1 .

The packet 1 comprises a corner wall 17 at the lid 14 and a succession of corner walls 17 at the container 12, along each connecting edge 8, 9, 10 and 1 1 .

More specifically, each edge 7a of the top wall 7 defines the first vertex 19 of of the side edges 18 of a respective corner wall 17.

Moreover, the lid 14 has a lower edge 29 the ends 30 of which define the second vertices 20 of the respective side edges 18 of the corner walls 17 adjacent to the front wall 2 and the two sides 4 and 5.

With reference to the corner walls 17 adjacent to the rear wall 3 and the two sides 4 and 5, the second vertices 20 of the respective side edges 18 are positioned along the connecting edges 10 and 1 1 of the rear wall 3.

Preferably, the first and the second crease lines 24 and 26 of the corner walls 17 positioned at the lid 14 are positioned at the same height as the hinge line 15 of the lid 14.

The first crease lines 24 of the corner walls 17 connecting the rear wall 3 with the respective sides 4 and 5 are cut to allow the opening and closing of the packet 1 , by the rotation of the lid 14 about the hinge line 15, as shown in Figure 3.

Considering each connecting edge 8, 9, 10 and 1 1 at the container 12, each corner wall 17 has at least one vertex 31 , between the first and second vertex 19 and 20, shared with the successive corner wall 17.

A pair of corner walls 17 adjacent to the rear wall 3 and the sides 4 and 5 at the container 12, has the vertices 31 shared with the corner walls 17 positioned at the lid 14.

A pair of corner walls 17 adjacent to the front wall 2 and the sides 4 and 5 at the container 12, has the first vertices 19 positioned at respective ends of an upper edge 35 of the container 12 which, in the closed condition of the packet 1 , is in contact with the lower edge 29 of the lid 14.

Moreover, at the sides 4 and 5, the lid 14 has two lower side edges 29a which extend from the ends 30 of the lower edge 29.

The container 12 has two upper side edges 35a which extend from the ends of the upper edge 35.

The side edges 29a and 35a subdivide the corresponding side panel 34 into two portions 34a and 34b, belonging, respectively, to the lid 14 and to the container 12.

When the packet 1 is in the closed condition, each lower side edge 29a is in contact with the respective upper side edge 35a.

The side edges 29a and 35a share, at one end of them, a third vertex 25 of a corner wall 17 adjacent to the rear wall 3 and to the sides 4 and 5. It should be noted that each edge 6a of the bottom wall 6 defines the second vertex 20 of the corner walls 17, positioned at the container 12 and adjacent to the bottom wall 6.

The vertices 31 , shared by two successive corner walls 17, are joined together by third crease lines 32, extending transversely to the axis A of the packet 1 .

More specifically, the third crease lines 32 connect together the shared vertices 31 positioned on each conecting edge 8, 9, 10, 1 1 and at the same level along the longitudinal axis A, transversely surrounding the packet 1 along the side walls 2, 3, 4 and 5.

Considering each side wall 2, 3, 4 and 5, the second and the third crease lines 26 and 32 are parallel to each other, according to a direction transversal to the longitudinal axis A.

In this way, the second and the third crease lines 26 and 32 define the third and the fourth panels 33 and 34 which are inclined to each other at a respective cusp 27.

Preferably, the packet 1 according to the first embodiment has sixteen corner walls 17, four for each connecting edge 8, 9, 10 and 1 1 . More specifically, four corner walls 17 are positioned at the lid 14 and twelve corner walls 17 are positioned at the container 12.

Thus, each side wall 2, 3, 4 and 5 of the packet 1 comprises four cusps 27 defined by the respective third and fourth panels 33 and 34, inclined at an angle to each other. More specifically, a cusp 27 at the lid 14 and three cusps 27 at the container 12.

In this embodiment, the first crease line 24 of each corner wall 17 is made at the centre line of the distance between the respective first and second vertices 19 and 20, according to a direction parallel to the longitudinal axis A.

Figure 4 shows a second embodiment of the packet 1 .

This embodiment differs from the first embodiment as the corner walls 17, positioned along each connecting edge 8, 9, 10 and 1 1 , are only made at the lid 14.

In effect, each connecting edge 8, 9, 10 and 1 1 at the container 12 is shaped with sharp edges (alternatively, the edge can be rounded or bevelled), since it is without the above-mentioned corner walls 17.

With regard to the technical characteristics of the corner walls 17 reference should be made to the above description for the first embodiment.

In other words, the packet 1 according to the second embodiment has four corner walls 17, one for each connecting edge 8, 9, 10 and 1 1 , at the lid 14.

Thus, each side wall 2, 3, 4 and 5 of the packet 1 comprises four cusps 27 defined by the respective third and fourth panels 33 and 34, inclined at an angle to each other.

In this embodiment, the first crease line 24 of each corner wall 17 is made at the centre line of the distance between the respective first and second vertices 19 and 20, according to a direction parallel to the longitudinal axis A. Moreover, the first and second crease lines 24 and 26 are at the same height as the hinge line 15.

Figure 5 shows a third embodiment of the packet 1 .

This embodiment has, like the first and the second embodiments of the packet 1 , the corner walls 17 along each connecting edge 8, 9, 10 and 1 1 at the lid 14, for which reference should be made to the considerations made previously.

Unlike the embodiments described, this packet 1 comprises, along each connecting edge 8, 9, 10 and 1 1 and at the container 12, a single corner wall 17.

With regard to the the first vertices 19 of the corner walls 17 positioned at the container 12 adjacent to the rear wall 3 and the sides 4 and 5, they are vertices 31 shared with the corner walls 17 of the lid 14.

With regard to the the first vertices 19 of the corner walls 17 positioned at the container 12 adjacent to the front wall 2 and the sides 4 and 5, they are positioned at respective ends of the upper edge 35 of the container 12. Each edge 6a of the bottom wall 6, defines the second vertex 20 of the corner walls 17.

In other words, the packet 1 according to the third embodiment has eight corner walls 17, two for each connecting edge 8, 9, 10 and 1 1 . More specifically, four corner walls 17 are positioned at the lid 14 and four corner walls 17 are positioned at the container 12.

Thus, each side wall 2, 3, 4 and 5 of the packet 1 comprises two cusps 27 defined by the respective third and fourth panels 33 and 34, inclined at an angle to each other, as shown in Figure 6.

In this embodiment, like the previous ones, the first crease line 24 of each corner wall 17 is made at the centre line of the distance between the first and the second vertex 19 and 20, according to a direction parallel to the longitudinal axis A. Figure 7 shows a fourth embodiment of the packet 1 .

The fourth embodiment is similar to the third embodiment and differs from it solely due to the positioning of the first crease line 24 of the corner walls 17 at the container 12.

In effect, the first crease line 24 is positioned, with respect to the bottom wall 6, at a distannce equal to a part of the distance between the first and the second vertex 19 and 20, along a direction parallel to the axis A, of between a third and a fifth.

Lasly, Figure 8 shows a fifth embodiment of the packet 1 which has, for each corner wall 17, the lenticular panel 28 concave towards the inside of the packet 1 .

More specifically, the packet 1 according to the fifth embodiment has eight corner walls 17, two for each connecting edge 8, 9, 10 and 1 1 . More specifically, four corner walls 17 are positioned at the lid 14 and four corner walls 17 are positioned at the container 12.

Thus, each side wall 2, 3, 4 and 5 of the packet 1 comprises two convex portions each positioned between two respective corner walls 17.

Figures 9 to 18 show the flat blanks from which it is possible to make the packests 1 according to the embodiments described.

More specifically, Figures 9, 1 1 , 13, 15 and 17 show first flat blanks 36 the folding of which provides the containers 12 with the hinged lid 14 and Figures 10, 12, 14, 16 and 18 show second flat blanks 48 the folding of which provides the collars 16 designed to be associated with the respective first flat blanks, to obtain the packets 1 according to the various embodiments.

With reference to Figures 9, 1 1 , 13, 15 and 17, the first flat blank 36 has a main longitudincal axis of extension B.

The first blank 36 comprises, in succession along the longitudinal axis B and from the top down, a top panel 37, a main panel 38, a bottom panel 39 and a secondary panel 40.

The top panel 37 comprises a plurality of panels and side flaps which, once folded, define the lid 14.

More specifically, the top panel 37 comprises a central panel 46, designed to define the top wall 7, from which a plurality of crease lines 47 branch off, which, once folded, define the corner walls 17.

The crease lines 47 extend from respective edges 46a of the central panel 46, according to a direction inclined to the longitudinal axis B by an angle of between 10° and 30°.

With reference to Figures 9, 1 1 and 13, the crease lines 47 have a substantially rhomboid pattern, the vertices of which are connected by the first, second and third crease lines 24, 26 and 32. The crease lines 24, 26 and 32 are parallel to each other, according to a direction perpendicular to the longitudinal axis B.

In these embodiments, the crease lines 47 and the first, second and third crease lines 24, 26 and 32 delimit on the first blank 36 the first, the second, the third and the fourth panels 21 , 22, 33 and 34.

With reference to Figure 17, the crease lines 47 have a substantially lenticular pattern.

The top panel 37 is connected to the main panel 38 by the hinge line 15. The main panel 38 is connected to the bottom panel 39 by a first line of weakness 44.

The bottom panel 39 is connected to the secondary panel 40 by a second line of weakness 45.

The hinge line 15 and the first and the second lines of weakness 44 and 45 are parallel to each other according to a direction transveral to the longitudinal axis B.

From the main panel 38 and from the secondary panel 40 extend, according to a direction transveral to the longitudinal axis B, two respective pairs of side panels 41 . The side panels 41 of each pair are positioned on opposite sides of the longitudinal axis B.

According to the prior art, respective flaps 42 extend from the two side panels 41 alongside the main panel 38 along a direction parallel to the longitudinal axis B.

More specifically, the flaps 42 are connected to the respective side panel 41 by lines of weakness 43 having a direction of extension transversal to the longitudinal axis B.

The sides 4 and 5 of the packet 1 are obtained by the 90° folding of the side panels 41 and the flaps 42, along the lines of weakness 43.

The rear wall 3 and the front wall 2 of the packet 1 are obtained, respectively, by bending the main panel 38 and the secondary panel 40 along the first and the second lines of weakness 44 and 45.

With particular refence to the blank 36 of Figure 9, it comprises a succession of crease lines 47 with a rhomboid pattern connecting the main panel 38 to a respective side panel 41 and the secondary panel 40 to a respective side panel 41 .

The succession of crease lines 47 is designed to define, after folding the blank 36, respective connecting edges 8, 9, 10, 1 1 of the packet 1 .

The vertices of the rhombi of the succession of crease lines 47 are connected together by the first, second and third crease lines 24, 26 and 32 delimiting on the first blank 36 the first, the second, the third and the fourth panels 21 , 22, 33 and 34.

With particular refence to the blank 36 of Figures 13 and 15, the crease lines 47 define a single rhomboid which connects the main panel 38 and the secondary panel 40 to the respective side panels 41 .

The vertices of the rhombi are connected together by the first, second and third crease lines 24, 26 and 32 which delimit the first, the second, the third and the fourth panels 21 , 22, 33 and 34.

As shown in Figure 17, the crease lines 47 which connect the main panel 38 and the secondary panel 40 to the respective side panels 41 have a curvilinear shape.

As shown in Figure 1 1 , the flat blank 36 has no succession of crease lines 47 connecting the main panel 38 to a respective side panel 41 and the secondary panel 40 to a respective side panel 41 . In this embodiment, the main panel 38 and the secondary panel 40 are connected to the respective side panels 41 by third lines of weakness 49.

With particular reference to Figures 10, 12, 14, 16 and 18, the second flat blanks 48 comprise the crease lines 47 designed to define, after folding the blanks 48, the corner walls 17 of the collars 16.

With reference to the blanks 48 shown in Figures 10, 12, 14 and 16 these have the crease lines 47 with a rhomboid pattern the vertices of which are connected by first, second and third crease lines 24, 26 and 32.

It should be noted that the rhomboid pattern of the crease lines 47 of the second blank 48 is similar to the pattern reproduced on the respective first blank 36.

In this regard, however, the second blank 48 shown in Figure 18 has crease lines 47 having a curvilinear pattern similar to the pattern reproduced on the respective first blank 36. Moreover, consequently, the second blank 48 of Figure 18 only has the third crease line 32.

Lastly, it should be noted that the second blank 48 can have a transversal extension, with respect to the longitudinal axis B, such as to face at least partly all the side walls 2, 3, 4, and 5 of the container 12, wrapping the group of cigarettes 13 more firmly.

The packet 1 according to this invention has major advantages.

In effect, even though the connecting edges 8, 9, 10 and 1 1 comprise respective corner walls 17 the sections of the packet 1 , made according to any plane transversal to the longitudinal axis A, have a constant outer perimeter. Consequently, the sections made at the third vertices 25 are right angle sections which have a perimeter equal to the rectangular sections made at the first and second vertices 19 and 20.

Lastly, it should be noted that the considerations made previously regarding a hard cigarette packet 1 with a hinged lid 14, as shown in the accompanying drawings, also apply to prior art packets for tobacco products, such as, for example, with the hinge line 15 positioned at the rear wall 3 parallel to the longitudinal axis A, and/or with the hinge line 15 positioned at a side 4, 5, and/or with the hinge line 15 positioned at the top wall 7, and also for prior art hard packets not with a hinged lid.

Claims

1 . A packet for tobacco products, having a longitudinal axis (A) of main extension, comprising four lateral walls (2, 3, 4, 5) defining a front wall (2), a rear wall (3) and a pair of side walls (4, 5), a bottom wall (6) and a top 5 wall (7), each side wall (4, 5) being joined to the front wall (2) and to the rear wall (3) by respective connecting edges (8, 9, 10, 1 1 ), characterised in that it comprises along each of the connecting edges (8, 9, 10, 1 1 ) of the packet (1 ) at least one corner wall (17) which has a transversal dimension variable along a direction parallel to the longitudinal axis (A)0 and is defined by respective side edges (18) which extend diverging from at least one first shared vertex (19), provided along the connecting edges (8, 9, 10, 1 1 ) of the packet (1 ), and converging at least on a second shared vertex (20), also provided along the same connecting edges (8, 9, 10, 1 1 ) of the packet (1 ); the side edges (18) of two corner walls (17)5 adjacent to the front wall (2) and to the two side walls (4, 5) and the side edges (18) of two corner walls (17) adjacent to the rear wall (3) and to the two sides (4, 5) extend at least along a portion of the front wall (2), of the rear wall (3) and of each of the two side walls (4, 5), defining for each lateral wall (2, 3, 4, 5), at least limited to the aforementioned portion o touched by the side edges (18) of the corner walls (17) and between these side edges (18), a deformation which extends towards the outside of the size of the packet (1 ) in such a way as to keep substantially constant the perimeter extension of each transversal section of the packet (1 ) executed transversely to the longitudinal axis (A).

5 2. The packet according to claim 1 , characterised in that each corner wall

(17) comprises a first and a second panel (21 , 22) substantially triangular in shape each of which extends from the respective first and second vertex (19, 20) and both converging towards the inside of the packet (1 ) until joining along a shared base (23) transversal to the connecting edges (8, 9, 0 10, 1 1 ) of the packet (1 ) and defined by a first crease line (24); each side

(21 a) of the first panel (21 ) meeting with a corresponding side (22a) of the second panel (22) at the respective third vertices (25) positioned at the ends of the shared base (23); on each portion of the front wall (2), of the rear wall (3) and of the two side walls (4, 5) touched by the side edges (18) of the corner walls (17) the third vertices (25) are joined together by a second crease line (26) which extends transversely to the axis (A) of the packet (1 ) and defines on each lateral wall (2, 3, 4, 5) a cusp (27) directed towards the outside of the size of the packet (1 ) in such a way as to keep substantially constant the perimeter extension of each transversal section of the packet (1 ) executed transversely to the longitudinal axis (A).

3. The packet according to claim 2, characterised in that each of the first and second crease lines (24, 26) are joined together at the third vertices (25) for the entire transversal extension of the packet (1 ).

4. The cigarette packet according to claim 2 or 3, characterised in that the first crease lines (24) of each corner wall (17) have the same extension.

5. The cigarette packet according to any one of claims 2 to 4, characterised in that each connecting edge (8, 9, 10, 1 1 ) of the packet (1 ) comprises a succession of corner walls (17) each having at least one vertex (31 ), between the first and second vertex (19, 20), shared with the successive corner wall (17); the vertices (31 ) shared by two successive corner walls (17) being positioned along a respective connecting edge (8, 9, 10, 1 1 ) and being joined together by third crease lines (32), extending transversely to the axis (A) of the packet (1 ); the third crease lines (32) being parallel to the second crease lines (26) and defining with them a plurality of third and fourth panels (33, 34) inclined between each other in such a way as to define a respective cusp (27).

6. The packet according to any one of claims 1 to 5, comprising a container (12) for housing a group of cigarettes (13), a lid (14) hinged to the container (12) along a hinge line (15), positioned at the rear wall (3) of the packet (1 ), for passing from a closed position to an open position of the packet (1 ), and vice versa, and a collar (16), fixed inside the container

(12) at least at the front wall (2); characterised in that each connecting edge (8, 9, 10, 1 1 ) comprises at the lid (14) a respective corner wall (17); each edge (7a) of the top wall (7) defines the first vertex (19) of a respective corner wall (17).

7. The packet according to claim 6, characterised in that the first and the second crease lines (24, 26) of the first and second panels (21 , 22) of each corner wall (17) positioned at the lid (14) are joined together at the third vertices (25) and are positioned at the same height as the hinge line (15) of the lid (14); the first crease lines (24) of the corner walls (17) adjacent to the rear wall (3) and to the side walls (4, 5) of the lid (14) being cut for allowing the opening and closing of the packet (1 ).

8. The packet according to claim 1 or 6, characterised in that each corner wall (17) comprises a lenticular panel (28) concave towards the inside of the packet (1 ) and the side edges (18) of each corner wall (17) are curvilinear arc-shaped; each portion of the front wall (2), of the rear wall (3) and of the two side walls (4, 5) touched by the curvilinear arc-shaped edges (18) of the corner walls (17), is convex towards the outside of the packet (1 ) in such a way as to keep substantially constant the perimeter extension of each transversal section of the packet (1 ) executed transversely to the longitudinal axis (A).

9. The packet according to any one of claims 6 to 8, characterised in that the collar (16) comprises at least two corner walls (17) each designed to engage with a respective corner wall (17) positioned at the lid (14), keeping the packet (1 ) in the closed condition.

10. The packet according to any one of claims 6 to 9, characterised in that each connecting edge (8, 9, 10, 1 1 ) comprises a single corner wall (17) at the container (12).