ITBO20120034A1 - MEASUREMENT METHOD AND PACKAGING MACHINE THAT USE RESTORABLE GLUE THAT DOES NOT DRY. - Google Patents

Description

DESCRIPTION

"Wrapping method and packing machine using repositionable glue that does not dry."

TECHNIQUE SECTOR

The present invention relates to a wrapping method and a packing machine which use repositionable glue which does not dry.

ANTERIOR ART

Rigid cigarette packets with hinged lid are the most popular cigarette packets currently on the market as they are simple to make, are easy and practical to use and offer good mechanical protection to the cigarettes contained inside.

In addition to the aforementioned rigid cigarette packets with hinged lid, rigid cigarette packets with sliding (or sliding) opening have been proposed comprising two containers inserted one inside the other in a separable way.

In other words, a rigid packet of cigarettes with sliding opening comprises an internal container, which is adapted to accommodate a group of cigarettes wrapped in a sheet of metallic paper wrapping and is housed inside an external container. so as to be able to slide with respect to the external container itself between a closed configuration, in which the internal container is inserted inside the external container, and an open configuration, in which the internal container is extracted from the external container.

A rigid packet of cigarettes with sliding opening and hinged lid has also been proposed, in which the internal container (or, alternatively, the external container) is provided with a hinged lid to rotate between a closed position and a open position of an open upper end of the inner container. The lid has a connecting tab which is integral with the lid at one end and with the external container (or, alternatively, with the internal container) at one end to control â € œautomaticallyâ € (that is, without the € ™ user must touch the lid) rotation of the lid by sliding the inner container with respect to the outer container.

According to the current known methods used to make cigarette packets with sliding opening and hinged lid, an external blank intended to make the external container is provided with a connection tab on which glue is deposited; subsequently, when the inner container is coupled to the outer blank, a rear wall of the inner container rests on the previously rubberized connection tab (i.e. provided with the glue) so as to join by gluing the connection tab to the rear wall of the inner container. To ensure at the same time a strong and very fast bond between the connection tab and the rear wall of the inner container, both a first permanent quick-setting and less strong glue is deposited on the connection tab (typically a hot glue that dries very quickly), as well as a second slow-setting and stronger permanent glue (typically a vinyl-based cold glue that dries very slowly but which when dry guarantees a very strong grip). However, the first permanent quick-setting glue dries very quickly and therefore it is necessary to deposit the first glue very close to the area where the inner container is coupled to the outer blank (i.e. the area where the rear wall of the inner container is rests on the connection tab carried by the outer blank); this constraint entails major construction problems in the packaging machine, since it is extremely complex to deposit glue on the connection tab near the area where the internal container is coupled to the external blank as in this area the connection tab is arranged inside a "cradle" made up of several previously folded outer blank panels (i.e. the connecting tab is covered by several previously folded outer blank panels and is therefore very difficult to reach).

DESCRIPTION OF THE INVENTION

The object of the present invention is to provide a wrapping method and a packing machine, which are free from the drawbacks described above and, in particular, are simple and economical to produce.

According to the present invention, a wrapping method and a packing machine are provided, as claimed in the attached claims.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will now be described with reference to the attached drawings, which illustrate some non-limiting examples of embodiment, in which:

- figure 1 is a front perspective view and in a closed configuration of a rigid cigarette packet with sliding opening and hinged lid;

Figure 2 is a front perspective view and in an open configuration of the packet of cigarettes of Figure 1; - figure 3 is a top view and in an open configuration of the packet of cigarettes of figure 1;

Figure 4 is a front perspective view of an external container of the packet of cigarettes of Figure 1;

Figure 5 is a front perspective view of an internal container of the packet of cigarettes of Figure 1 without the group of cigarettes and provided with a connecting tab;

figure 6 is a plan view of an internal blank used to make an internal container of the packet of cigarettes of figure 1;

Figure 7 is a plan view of an external blank used to make an external container for the packet of cigarettes of Figure 1;

Figure 8 is a schematic and perspective view of a packing machine which produces the packet of cigarettes of Figure 1 and is made in accordance with the present invention;

Figure 9 is a schematic and perspective view of a wrapping wheel of a second wrapping unit of the packing machine of Figure 8; And

Figure 10 is a plan view of the outer blank of Figure 7 partially folded and provided with glue immediately before being fed to the wrapping wheel of Figure 9.

PREFERRED EMBODIMENTS OF THE INVENTION In Figures 1 and 2, the number 1 indicates, as a whole, a rigid packet of cigarettes with sliding opening by translation (linear movement).

The pack 1 of cigarettes illustrated in Figure 1 comprises a group 2 of wrapped cigarettes (visible in Figure 2), ie a group of cigarettes wrapped in a sheet of metallized paper wrapping. Furthermore, the pack 1 of cigarettes comprises an internal container 3 of a rigid type, inside which the wrapped group 2 is directly placed, and an external container 4 of a rigid type, which slides the internal container 3 into place. to allow the inner container 3 itself to slide with respect to the outer container 4 to move with a translation movement between a closed configuration (illustrated in figure 1), in which the inner container 3 is completely inserted inside the outer container 4 , and an open configuration (illustrated in Figure 2), in which the internal container 3 is extracted from the external container 4 so as to make it possible to access the group 2 of wrapped cigarettes. As illustrated in Figure 5, the internal container 3 is parallelepiped in shape and has a lower wall 5, an open upper end 6 opposite the lower wall 5, a front wall 7 and a rear wall 8 parallel and opposite to each other, and two side walls 9 parallel to each other and interposed between walls 7 and 8.

As shown in Figure 4, the external container 4 has an open upper end 10 and is provided with a lid 11, which is hinged to the external container 4 along a hinge 12 to rotate, with respect to the external container 4 itself, between an open position (illustrated in Figures 2, 3 and 4) and a closed position (illustrated in Figure 1) of the open upper end 10 of the external container 4 and, at the same time, also of the open upper end 6 of the inner container 3. The external container 4 has a parallelepiped shape and has a lower wall 13 opposite the open upper end 10, a front wall 14 and a rear wall 15 parallel and opposite to each other, and two side walls 16 parallel to each other and interposed between the walls 14 and 15.

The lid 11 has an upper wall 17 which, when the lid is in the closed position, closes the open upper end 10 of the external container 4 (and, at the same time, also the open upper end 6 of the container 3 internal). The upper wall 17 of the lid 11 is â € œflatâ € (that is, it is made up of a single cardboard panel or several cardboard panels packed one on top of the other and is therefore internally full). When the lid 11 is in the closed position, the upper wall 17 of the lid 11 is arranged flush with the upper edges of the walls 14, 15 and 16 of the outer container 4.

According to a preferred embodiment, the rear wall 8 of the internal container 3 is connected to the upper wall 17 of the lid 11 by means of a connecting tab 20 to control â € œautomaticallyâ € (ie without the user having to touch the lid 11) rotation of the lid 11 by sliding the inner container 3 with respect to the outer container 4. In other words, thanks to the connection tab 20 which mechanically binds the upper wall 17 of the lid 11 to the rear wall 8 of the internal container 3, when the internal container 3 slides with respect to the external container 4 from the closed configuration to the open configuration, the cover 11 is pushed by the internal container 3 from the closed position to the open position in an "automatic" way (ie without the user having to touch the lid 11); similarly, when the internal container 3 slides with respect to the external container 4 from the open configuration to the closed configuration, the lid 11 is dragged by the internal container 3 from the open position to the closed position in an `` automatic '' way (i.e. without the user must touch the lid 11). In this way, the user only has to apply the thrust necessary to make the internal container 3 slide with respect to the external container 4 without having to touch the lid 11 whose rotation is controlled â € œautomaticallyâ €. Preferably, the connecting tab 20 is seamlessly integral with the lid 11 and is glued to the rear wall 8 of the internal container 3.

As shown in Figures 1, 2 and 4, the side wall 16 of the external container 4 has a through window 21 through which the underlying side wall 9 of the internal container 3 facing the side wall 16 of the external container 4 is accessible to allow the application of a thrust to the internal container 3 in order to move the internal container 3 between the closed configuration and the open configuration. In other words, in use to use the pack 1 of cigarettes, the user holds the external container 4 with one hand and at the same time with the thumb of the same hand pushes on the side wall 9 of the internal container 3 through the window 21 of the side wall 16 of the outer container 4 so as to apply a thrust to the inner container 3 aimed at making the inner container 3 slide with respect to the outer container 4. The containers 3 and 4 of the pack 1 of cigarettes illustrated in Figures 1-5 are obtained starting from corresponding blanks 22 and, respectively, 23 illustrated in Figures 6 and 7. Each of the blanks 22 and 23 includes, among other things, a plurality of elements, which are marked, where possible, with accented reference numbers equal to the reference numbers which distinguish the corresponding walls of the respective container 3 and 4.

With reference to Figure 6, the internal blank 22 has two longitudinal weakening lines 24 and a plurality of transversal weakening lines 25, which define, between the two longitudinal weakening lines 24, a panel 7â € ™ constituting the front wall 7 of the inner container 3, a panel 5 'constituting the lower wall 5 of the inner container 3, and a panel 8' constituting the rear wall 8 of the inner container 3. To panel 8â € ™ a reinforcement panel 8â € is connected along a transversal weakening line 25, and in turn to the reinforcement panel 8â € a further panel 8 is connected along a transversal weakening line 25. reinforcement; the reinforcement panels 8â € and 8â € ™ â € are folded 180 ° around the corresponding transverse weakening lines 25 to be superimposed and glued to an internal surface of the panel 8â € ™ so as to create a thickening (strengthening) of the wall 8 rear. According to a different embodiment not shown, the reinforcement panels 8â € and 8â € ™ â € are absent.

Panel 7â € ™ has a pair of lateral wings 9â € ™, which form an external part of the side walls 9, are arranged on opposite sides of panel 7â € ™, and are separated from panel 7â € ™ by the longitudinal lines 24 of weakening. Panel 8â € ™ has a pair of side wings 9â €, which are glued to the corresponding wings 9â € ™, constitute an internal part of the side walls 9, are arranged on opposite sides of panel 8â € ™, and are separated from the panel 8â € ™ by the longitudinal 24 lines of weakening. The lateral wings 9 'of the panel 8' have a pair of tongues 26, each of which is separated from the respective lateral wing 9 'by a transverse weakening line 25.

With reference to Figure 7, the outer blank 23 has two longitudinal weakening lines 27 and a plurality of transversal weakening lines 28, which define, between the two longitudinal weakening lines 27, a panel 17â € ™ constituting the upper wall 17 of the lid 11, a panel 15 'constituting the rear wall 15 of the outer container 4, a panel 13' constituting the lower wall 13 of the outer container 4, and a panel 14 'constituting the front wall 14 of the outer container 4.

The connecting tab 20 is connected to the panel 17â € ™ and along a transversal weakening line 28 which in turn is composed of three panels 20â € ™, 20â € and 20â € ™ â € which are separated from each other by respective transverse weakening lines 28; the panel 20â € ™ of the connecting tab 20 is glued to an internal surface of the upper wall 17 of the cover 11 (therefore to an internal surface of the panel 17â € ™), while the panel 20â € ™ â € of the connecting tab 20 is glued to an external surface of the rear wall 8 of the internal container 3 (therefore to an external surface of the panel 8â € ™).

Panel 14â € ™ has a pair of lateral wings 16â € ™, which form an external part of the side walls 16, are arranged on opposite sides of the panel 14â € ™, and are separated from panel 14â € ™ by the longitudinal lines 27 weakening. Panel 15â € ™ has a pair of side wings 16â €, which are glued to the corresponding wings 16â € ™, constitute an internal part of the side walls 16, are arranged on opposite sides of the panel 15â € ™, and are separated from the panel 15â € ™ from the longitudinal lines 27 of weakening. The lateral wings 16 'of the panel 15' have a pair of tabs 29, each of which is separated from the respective lateral wing 16 'by a transverse weakening line 28.

Figure 8 schematically illustrates a cigarette packing machine 30 which produces packets 1 of cigarettes. The packing machine 30 comprises a wrapping unit 31 which produces the groups 2 of wrapped cigarettes, a subsequent wrapping unit 32 which produces the internal containers 3 by folding the internal blanks 22 around the corresponding groups 2 of wrapped cigarettes, a subsequent unit 33 of wrapping that makes the outer containers 4 (thus completing the formation of the packets 1 of cigarettes) by folding the outer blanks 23 around the corresponding inner containers 3, and finally a processing unit 34 which receives the packets 1 of cigarettes from the wrapping unit 33 and performs a first opening (i.e. the first sliding of the inner container 3 with respect to the outer container 4 to partially extract the inner container 3 itself and thus determine the rotation of the lid 11 towards the open position) and subsequent closure of each packet 1 of cigarettes.

As illustrated in Figure 9, the wrapping unit 33 comprises a wrapping conveyor 69 which is provided with a plurality of wrapping pockets 70, each of which is adapted to house an outer blank 23 and a corresponding container 3 internal to advance the outer blank 23 and the internal container 3 along a wrapping path P4 which extends between an inlet station S8 and an outlet station S10.

Preferably, the wrapping unit 33 comprises a wrapping conveyor (not illustrated) which accomplishes the partial and preliminary folding of the outer blanks 23 and then feeds the pre-folded outer blanks 23 to the wrapping conveyor 69. A pre-folded outer blank 23 (i.e. how it is fed to the wrapping conveyor 69) is illustrated in Figure 10, where the tab 20 is rotated 180 ° (around the corresponding transverse weakening line 28 which connects the tab 20 to panel 17â € ™), panels 20â € ™ and 20â € are superimposed on the internal surface of panel 17â € ™, and panel 20â € ™ â € is in contact with the internal surface of panel 15â € ™. As previously mentioned, only panel 20â € ™ is glued to panel 17â € ™.

At the inlet station S8, a partially pre-folded outer blank 23 is fed into a wrapping pocket 70 causing a further folding of the outer blank 23 itself. At a feeding station S9 arranged between the inlet station S8 and the outlet station S10, an internal container 3 is fed into a wrapping pocket 70 to be coupled to the previously fed external blank 23; in particular, the rear wall 8 of the internal wrapping 3 is placed on the panel 15â € ™ of the external blank 23. At the outlet station S10, the outer container 4 (formed by folding the outer blank 23 around the inner container 3) is extracted from the wrapping pocket 70 and sent towards the processing unit 34.

In the input station S8 there is a folding device 71, which bends the tabs 29 of the outer blank 23 by 90 ° (around the corresponding transverse weakening lines 28) with respect to the wings 16â € and thus inserting the outer blank 23 into the the wrapping pocket 70 determines the 90 ° folding (around the corresponding transverse weakening line 28) of the panel 13â € ™ and the 90 ° folding (around the corresponding longitudinal weakening lines 27) of the two wings 16â € (while the panel 17â € ™ of the outer blank 23 remains coplanar with the panel 15â € ™); in other words, after the 90 ° bending of the tabs 29, the entry of the outer blank 23 into the wrapping pocket 70 determines the 90 ° bending of the panel 13â € ™ and the two wings 16â € (while the panel 17â € ™ of the outer blank 23 remains coplanar with the panel 15â € ™). A folding device 72 is arranged between the feeding station S9 and the output station S10, which bends the panel 17â € ™ in the internal blank 23 by 90 ° (around the corresponding transverse weakening line 28) with respect to the panel 15â (Ie folds the lid 11 by 90 ° with respect to the panel 15â € ™) causing a simultaneous axial sliding of the internal container 3 with respect to the external blank 23 (as will be better described below). Immediately downstream of the folding device 72 there is a folding device 73, which folds the panel 14 'by 90 ° (around the corresponding transverse weakening line 28). The folding of the outer blank 23 is completed in the output station S10 at the same time as the extraction of the outer container 4 from the wrapping pocket 70: during the extraction of the outer container 4 a folding device 74 folds by 90 ° (around the corresponding longitudinal weakening lines 27) the wings 16â € ™ against the wings 16â € forming the side walls 16 of the external container 4; preferably, a gumming device (not illustrated) is arranged immediately upstream of the folding device 74 to deposit glue between the wings 16â € ™ and 16â € immediately before the folding of the wings 16â € ™.

According to a preferred embodiment illustrated in Figures 8 and 9, the wrapping conveyor 69 is constituted by a rotatable wheel which rotates in pitch around a central rotation axis 75 arranged horizontally. Consequently, the wrapping path P4 which extends from the input station S8 to the output station S10 has a circular shape.

Upstream of the inlet station S8 of the wrapping conveyor 69 there is a gumming device 77 which deposits glue between the tabs 29 and the panel 13â € ™ of the outer blank 23. Furthermore, the rubberizing device 77 also deposits glue 78 and glue 79 (illustrated in figure 10) on the panel 20â € ™ â € of the connecting tab 20 which had previously been placed on the panel 15â € ™ during partial and preliminary folding of the outer 23 blanks. The glue 78 and the glue 79 determine the gluing of the rear wall 8 of the internal container 3 to the connecting tab 20 (i.e. to the panel 20â € ™ â € of the connecting tab 20) when the internal container 3 is placed on the panel 15â € ™ of the outer blank 23 in the feeding station S9 of the wrapping conveyor 69.

As previously mentioned, the rubberizing device 77 simultaneously deposits glue 78 and glue 79 on the panel 20â € ™ of the connecting tab 20 which had previously been placed on the panel 15â € ™. The glue 78 and the glue 79 determine the gluing of the rear wall 8 of the internal container 3 to the connecting tab 20 (i.e. to the panel 20â € ™ â € of the connecting tab 20) when the internal container 3 is placed on the panel 15â € ™ of the outer blank 23 in the feeding station S9 of the wrapping conveyor 69. The glue 78 is permanent and dries, ie after a certain time from the instant of deposition the volatile components of the glue 78 evaporate causing a permanent and non-separable connection, if not following a mechanical break that cannot be reassembled; on the other hand, glue 79 is different from glue 78 and is repositionable and does not dry, that is, even after a long time from the instant of deposit, glue 79 maintains its characteristics unaltered and allows the glued parts to be separated and reunited several times . Preferably, the permanent drying glue 78 is a vinyl-based cold glue.

According to a preferred embodiment, the repositionable glue 79 which does not dry is deposited away from a hinge 12â € ™ of the connecting tab 20 (the hinge 12â € ™ of the connecting tab 20 is constituted by the transversal weakening line 28 which divides the two panels 20â € and 20â € ™ â €), while the permanent drying glue 78 is deposited near the hinge 12â € ™ of the connecting tab 20. In this way, the repositionable glue 79 which does not dry works in shear during the folding of the lid 11 performed by the folding device 72 (and is therefore more stressed) while the permanent glue 78 which dries works in traction during the folding of the lid 11 performed by the folding device 72 (and therefore is less stressed); It is important that the repositionable glue 79 is stressed more as it is able to reach the maximum of its adhesion capacity much more quickly (practically instantaneously), and similarly it is important that the permanent glue 78 is less stressed. as it takes a relatively long time to reach an adequate adhesion capacity.

According to a preferred embodiment, the aforementioned use of permanent glue 78 which dries combined with repositionable glue 79 which does not dry is not limited to the particular case described above, but can advantageously be extended in all situations where it is necessary to glue together. two distinct elements in the realization of a package by folding a blank (or a sheet of wrapping) around a group of articles. By way of example, each of the glues that are deposited on the blanks 22 and 23 can comprise a part of permanent glue which dries quickly (ie a hot glue) and a part of permanent glue which dries slowly (ie a cold glue); alternatively, in each of the glues that are deposited on the blanks 22 and 23 in place of the permanent glue that dries quickly (i.e. hot glue) it is possible to use a repositionable part of glue that does not dry similar to repositionable glue 79 described above.

The wrapping method and the corresponding packing machine 30 described above allow both glues 78 and 79 to be applied by means of the gumming device 77 which is arranged upstream of the wrapping conveyor 69, or is arranged in an area where the blank 23 exterior is still substantially flat and the connection tab 20 (in particular the panel 20â € ™ â € of the connection 20) is easily accessible and therefore rubber. Consequently, the deposit of both glues 78 and 79 on the connection tab 20 (in particular on the panel 20â € ™ â € of the connection 20) is extremely simple and effective and is obtained by means of a simple and easy gumming device 77 realization and assembly in the packing machine 30. This result is obtained thanks to the fact that glue 79 `` quick setting '' instead of being a traditional permanent hot glue that dries very quickly (and therefore must be deposited immediately before its use) is a repositionable glue that does not dry; the repositionable glue 79 allows at the same time to have an immediate grip and to be applied in any position and at any moment, in fact, never drying, therefore, purely theoretically, it could be deposited on the outer blank 23 even days before the folding of the 23 outer blank itself.

Claims (10)

R I V E N D I C A Z I O N I 1) Wrapping method for making a package (1) by folding at least one blank (23) around a group (2) of articles; the wrapping method includes the steps of: deposit between two elements (20â € ™ â €, 8) of the package (1) which must be joined together both a first glue (79) and a second permanent glue (78) which dries different from the first glue (79); And bring the two elements (20â € ™ â €, 8) into contact to glue the two elements (20â € ™ â €, 8) together using the first glue (79) and the second glue (78); the wrapping method is characterized by the fact that the first glue (79) is a repositionable glue that does not dry. 2) Wrapping method according to claim 1, wherein the second permanent drying glue (78) is a cold glue, preferably vinyl-based. 3) Method of wrapping according to claim 1 or 2 and comprising the further step of depositing the two glues (78, 79) simultaneously. 4) Wrapping method according to claim 1, 2 or 3, wherein: the package (1) is a package (1) of smoking articles with sliding opening and with hinged lid (11) and comprises: an internal container (3) which accommodates a group (2) of smoking articles and has an open upper end (6); an external container (4), which slides inside the internal container (3) so as to allow the internal container (3) to slide with respect to the external container (4) between a closed configuration, in which the container (3 ) internal is inserted inside the external container (4), and an open configuration, in which the internal container (3) is extracted from the external container (4); and a lid (11) which is hinged to a rear wall (15) of the outer container (4), closes the open upper end (6) of the inner container (3) when it is in a closed position, and is ̈ mechanically connected to the internal container (3) by means of a connecting tab (20); the internal container (3) being obtained by folding a first blank (22), or internal blank (22), and the external container (4) being obtained by folding a second blank (23), or external blank (23) ; the wrapping method includes the further steps of: placing the connecting tab (20) in contact with a first panel (15â € ™) of the outer blank (23); depositing the two glues (78, 79) between the connecting tab (20) and a rear wall (8) of the internal container (3); and place the internal container (3) on the first panel (15â € ™) of the external blank (23) in order to glue the connecting tab (20) to the rear wall (8) of the internal container (3). 5) Method of wrapping according to claim 4 and comprising the further steps of: deposit the first repositionable glue (79) that does not dry far from a hinge (12â € ™) of the connecting tab (20); And deposit the second permanent glue (78) which dries near the hinge (12â € ™) of the connecting tab (20). 6) Packaging machine (30) for making a package (1) by folding at least one blank (23) around a group (2) of articles; the packing machine (30) comprises: a gumming device (77) that deposits between two elements (20â € ™ â €, 8) of the package (1) that must be joined together both a first glue (79) and a second permanent glue (78) that dries differently from the first glue (79); and a feeding station (S9) that brings the two elements (20â € ™ â €, 8) of the package (1) into contact to glue the two elements (20â € ™ â €, 8) together using the first glue ( 79) and by means of the second glue (78); the packing machine (30) is characterized by that the first glue (79) is a repositionable glue that does not dry. 7) Packaging machine (30) according to claim 6, wherein the second permanent drying glue (78) is a cold glue, preferably vinyl-based. 8) Packaging machine (30) according to claim 6 or 7, in which the gumming device (77) deposits the two glues (78, 79) simultaneously. 9) Packaging machine (30) according to claim 6, 7 or 8, wherein: the pack (1) is a pack (1) of smoking articles with sliding opening and hinged lid (11) and includes: an internal container (3) which accommodates a group (2) of smoking articles and has an open upper end (6); an external container (4), which slides inside the internal container (3) so as to allow the internal container (3) to slide with respect to the external container (4) between a closed configuration, in which the container (3 ) internal is inserted inside the external container (4), and an open configuration, in which the internal container (3) is extracted from the external container (4); and a lid (11) which is hinged to a rear wall (15) of the outer container (4), closes the open upper end (6) of the inner container (3) when it is in a closed position, and is ̈ mechanically connected to the internal container (3) by means of a connecting tab (20); and in which the connecting tab (20) is arranged in contact with a first panel (15â € ™) of the outer blank (23); the machine (30) being characterized in that the rubberizing device (77) deposits the two glues (78, 79) between the connecting tab (20) and a rear wall (8) of the internal container (3); and by the fact that the feeding station (S9) rests the internal container (3) on the first panel (15â € ™) of the external blank (23) in order to glue the connecting tab (20) to the rear wall (8) of the container (3) internal. 10) Packaging machine (30) according to claim 9, in which the gumming device (77) deposits the first repositionable glue (79) which does not dry far from a hinge (12â € ™) of the connecting tab (20), and deposits the second permanent glue (78) that dries near the hinge (12â € ™) of the connecting tab (20).