Patent Description:
Accordingly, the present invention finds advantageous use in the technical field of the production and marketing of packaging machines, and more particularly in the technical field of the production and marketing of substantially automatic machines for packaging together a plurality of products.

The present description of the known art is intended as an introduction of certain aspects of the known art in the relevant technical field, which may be associated with and/or related to the description of the present invention in order to facilitate a better understanding of certain particular aspects of the present invention. Accordingly, this description of the known art is not necessarily intended as a description and/or disclosure of a particular embodiment of the prior art.

In the relevant technical field, machines for packaging are known, and in particular machines for packaging pouch wrappings are known.

The term "pouch wrapping" is to be understood, for the purposes of this privative, as meaning a substantially flexible container shaped like a pouch, for example made of paper or plastic or similar, intended to contain further products, for example foodstuffs or similar. Known in the industry are for example pouch-shaped wrapping made of substantially paper material intended to contain bakery products.

In the relevant industry, it is known to stack pouch wrapping groups and then wrap them with a layer of flexible material, normally plastic material, to make a pouch wrapping, suitable for shipping.

As is well known, pouch wrapping have an opening for the products to be contained and an opposite bottom, realised by fixing, normally by sealing or gluing, two opposing flaps. This fixing of the flaps defines a larger footprint than the footprint of the opening.

In this situation, stacking pouch wrappings vertically against each other all positioned at the same angle results in a stack of pouch wrappings with greater height at the bottoms of the wrappings than the height the stack reaches at the openings, due to the greater thickness of the bottoms, which is accentuated by stacking them.

This stack proved difficult in practice to pack and transport due to its uneven shape, making it difficult to store with other stacks.

A further drawback is that the stack of pouch wrappings thus formed is difficult to wrap with the plastic layer, increasing costs and packaging time.

It is therefore well known in the technical field of machines for packaging pouch wrapping that pouches need to be stacked in a so-called staggered manner, i.e. by stacking groups of pouches at different angular positions in a staggered manner so that the bottom of a first group is positioned above the openings of a second group below, or vice versa, to obtain a stack of pouch wrappings groups of substantially uniform height.

For this purpose, several machines for packaging pouch wrappings are known which are capable of stacking pouch wrappings groups at different angular positions in an alternating manner.

An example of a packaging machine known in the relevant technical field is equipped with a conveyor belt to transport the pouch wrappings along a movement direction. Normally, the pouch wrappings are loaded onto the machine's conveyor belt in groups comprising a plurality of wrappings stacked vertically all in the same direction. The groups of pouch wrappings are loaded onto the conveyor belt in succession, one group following the other. Said machine of a known type comprises a rotating platform placed at the interception of said conveyor belt and capable of rotating one group of pouch wrappings by <NUM>° with respect to the previous one and to the next one in such a way as to realise a column of pouch wrappings groups rotated by <NUM>° compared to each other in an alternating manner.

The machine of the known type further comprises a mobile platform placed at the exit section of the conveyor belt and configured to receive the pouch wrappings groups.

Said movable platform is vertically movable downwards step-by-step, i.e. as it receives a new group of pouches wrapping to allow the next group to stack on top of the previous one. In this way, the pouch wrappings groups stack on top of each other rotated <NUM>° each relative to the next and the previous one.

Subsequently, the known type of machine involves packing the stack of pouch wrappings groups inside a package, e.g. a cardboard box or a layer of flexible plastic material. The known type of machine briefly described so far has proved to be not without its drawbacks in practice.

The main drawback lies is that it is very complex to set up a conveyor belt.

Another drawback is that the known machine is very bulky and difficult to install.

A further drawback is that the known machine is very expensive to manufacture, which results into a high selling price.

Examples of machines of the known type are described in the documents <CIT> and <CIT> <CIT> discloses a machine suitable for packaging pouch wrapping(s), comprising a support frame, defining an object feed and an outlet section, first gripping means mechanically mounted on said support frame in proximity to said inlet section and configured and controlled to be movable at least between a loading configuration, a first unloading configuration and a second unloading configuration rotated about <NUM>° with respect to said first unloading configuration, packaging means mechanically assembled on said support frame and configured to receive and wrap an item in at least one layer of flexible material and thus make a package, and second gripping means mechanically mounted on said support frame.

It is the purpose of the present invention to provide a machine for packaging pouch wrappings which enables the above-mentioned requirements to be met, at least in part, and overcome the drawbacks of the above-mentioned known art.

A further purpose of the invention is to provide a machine for packaging pouch wrappings which is more easily realisable than the known art.

A further purpose of the invention is to provide a machine for packaging pouch wrappings which is more economical than machines of the known art.

A further purpose of the invention is to provide a machine for packaging pouch wrappings which is both economically advantageous and technically completely reliable. A further purpose of the present invention is to provide a machine for packaging pouch wrappings which is alternative and/or improved compared to conventional solutions. Another purpose of the present invention is to propose a machine for packaging pouch wrappings which has an alternative and/or improved configuration, both in terms of construction and in terms of function, compared to traditional solutions.

All of these purposes, either singly or in any combination thereof, and others which will result from the following description are achieved, according to the invention, with a machine for packaging pouch wrappings having the features indicated in claim <NUM>.

The present invention is further described herein in some preferred embodiments thereof, shown for illustrative and non-limiting purposes only with reference to the appended tables of drawings, wherein:.

An example of a machine for packaging pouch wrappings according to the invention has been identified as a whole by reference <NUM> in the appended figures.

The machine in question is advantageously used in the technical area of the production and marketing of machines for packaging products, and in particular in the technical area of the packaging of pouch wrappings, such as, in particular, flexible pouches made of plastic and/or paper material or similar.

The machine <NUM> object of the present invention is advantageously applicable to a larger plant for the production of pouch wrappings, suitably placed downstream of suitable further machines (not object of the present invention and therefore not described in detail below) for making the wrapping and/or machines for making groups of pouch wrappings vertically stacked on each other.

For the purposes of this privative right, the term "pouch wrapping" is to be understood in the following as meaning a containing element, preferably flexible, made of plastic and/or paper and/or similar and/or analogous material, configured to contain at least one product inside it, in particular provided with a main body extending between a first end in which an access opening is realised for inserting the products inside it and a second end in which a closed bottom is realised, opposed to the opening. The closed bottom of each pouch wrapping is thicker than the opening.

Furthermore, for the purposes of this privative, the term "group" of pouch wrappings is to be understood in the following as meaning a plurality of pouch wrapping vertically stacked with each other, one overlapping the other with all first ends vertically aligned with each other and all second ends vertically aligned with each other. The group of pouch wrappings therefore has a larger footprint at the second end wherein the closed ends are aligned, and a smaller footprint at the first end wherein the access apertures of the plurality of pouch wrappings comprising it are aligned.

Furthermore, for the purposes of the present privative, the term "stack" of pouch wrappings groups is to be understood hereafter as meaning a succession of vertically stacked groups, wherein each group is rotated <NUM>° around a vertical axis compared to the preceding group and to the following group.

In other words, in the stack of pouch wrapping groups, the groups are stacked vertically in a staggered manner so that the openings of a first group are then covered by the closed bottoms of the next group.

The machine <NUM> for packaging pouch wrappings comprises a support frame <NUM> defining an inlet section <NUM> for at least one group of pouch wrappings and an outlet section <NUM> for packaging a plurality of pouch wrappings groups.

With particular reference to the attached figures, the inlet section <NUM> and the outlet section <NUM> are realised laterally compared to a longitudinal X-direction (coinciding with a movement direction X described below). Obviously, in accordance with a further, not illustrated embodiment, the inlet section <NUM> and the outlet section <NUM> can be provided specularly compared to the highlighted one, or again the inlet section <NUM> can be provided on a different side compared to the outlet section <NUM>, without thereby departing from the purpose of protection of this privative.

In accordance with a first embodiment, the inlet section <NUM> is configured to allow the entry of only one group of pouch wrappings to make a package comprising a single stack of pouch wrappings groups.

In accordance with a further embodiment, the inlet section <NUM> may be configured to receive two or more groups of pouches wrappings horizontally arranged side-by-side with each other to realise a corresponding pack comprising two or more stacks of pouch wrappings groups.

The machine advantageously comprises first gripping means <NUM> mechanically mounted on said support frame <NUM> in the proximity of said inlet section <NUM> and configured and controlled to be movable at least between a loading configuration in which they receive said group of pouch wrappings, a first unloading configuration and a second unloading configuration rotated about <NUM>° compared to said first unloading configuration.

The machine <NUM> according to the invention further comprises second gripping means <NUM> mechanically mounted on said support frame <NUM> and configured and controlled to be movable between a first configuration in which they pick up said group of pouch wrappings directly from said first gripping means <NUM> in said first unloading configuration with said group of pouch wrappings in a first angular position and, alternatively, in said second unloading configuration with said group of pouch wrappings in a second angular position, and a second configuration in which they release said group of pouch wrappings to form a stack of pouch wrappings groups.

Suitably, the stack of pouch wrappings groups is made with groups vertically stacked with each other in the first angular position and in the second angular position alternately.

Advantageously, the packaging means <NUM> are mechanically mounted on said support frame <NUM> and configured to receive said stack of pouch wrappings groups and wrap said stack with at least one layer of flexible material and thus realize said package.

Advantageously, said first gripping means <NUM> are configured to rotate about a first substantially vertical rotation axis Y, wherein said first unloading configuration is rotated about <NUM>° clockwise compared to said loading configuration and said second unloading configuration is rotated about <NUM>° counter clockwise compared to said loading configuration.

Advantageously, said second gripping means <NUM> are configured at least to rotate about a second rotation axis Y' substantially vertical and parallel to said first rotation axis Y of said first gripping means <NUM>, wherein in a first angular position they are turned towards said first gripping means <NUM> to pick up said group of pouch wrappings and in a second angular position they are turned towards said packaging means <NUM>.

Advantageously, said second gripping means <NUM> in said second configuration are intersected with said first gripping means <NUM> in said first unloading configuration or in said second unloading configuration to pick up said pouch wrappings group.

Advantageously, said first gripping means comprise a first loading base <NUM> configured to support said pouch wrappings groups and comprising a first series of elongated elements <NUM> parallel to each other and spaced apart.

Advantageously, said second gripping means <NUM> comprise a second loading base <NUM> configured to support said pouch wrappings group and comprising a second series of elongated elements <NUM> parallel to each other and spaced apart and configured to be interposed between said first series of elongated elements <NUM> with said second gripping means <NUM> in said first configuration.

Advantageously, said first gripping means <NUM> comprise an upper jaw <NUM> movable between an open configuration, wherein it is moved away from said first loading base <NUM> to allow said pouch wrappings group to rest on said first loading base <NUM>, and a closed configuration wherein it is placed substantially counter faced to said first loading base <NUM> to block said pouch wrappings group.

Preferably, the upper jaw <NUM> of the first gripping means <NUM> is rotatably mounted at an end of said first loading base <NUM> and is rotatably movable around a rotation axis Z orthogonal compared to said first rotation axis Y and preferably is substantially horizontal. In this way, the upper jaw <NUM> is rotatable around the horizontal rotation axis X between the open configuration and the closed configuration.

Suitably, the first gripping means <NUM> block the pouch wrappings group on the first loading base <NUM> by movement of the first upper jaw <NUM> from the open configuration to the closed configuration, such that the pouch wrappings group remains stable during movement of the first gripping means <NUM> from the loading configuration to the first unloading configuration or to the second unloading configuration.

Furthermore, the first upper jaw <NUM> of the first gripping means <NUM> is configured to be moved from the closed configuration to the open configuration when the first gripping means <NUM> themselves reach the first unloading configuration or the second unloading configuration. In this way, the first gripping means <NUM> allow the second gripping means <NUM> to pick up the pouch wrappings group.

Advantageously, said upper jaw <NUM> of said first gripping means <NUM> comprises a third series of elongated elements <NUM> which are parallel to each other and spaced apart and arranged vertically offset from corresponding first series of elongated elements <NUM>, thereby defining spaces between them to allow the insertion of said second series of elongated elements <NUM> with said second gripping means <NUM> in said first configuration.

Preferably, the second gripping means <NUM> comprise a second upper jaw <NUM> movable between an open configuration, wherein it is moved away from said second loading base <NUM> to allow the pick-up of said set of pouch wrappings from said first gripping means <NUM>, and a closed configuration wherein it is placed substantially counter faced to said second loading base <NUM> to block said set of pouch wrappings, in particular to hold them against said second loading base <NUM>.

Advantageously, the second gripping means <NUM> are movable along a movement direction X, substantially orthogonal compared to the second rotation axis Y'.

Advantageously, the first series of elongated elements <NUM> of the first loading base <NUM> of the first gripping means <NUM> and preferably the second series of elongated elements <NUM> of the second loading base <NUM> are movable parallel to the movement direction X, i.e. they are movable substantially horizontally.

Appropriately, the second gripping means <NUM> are moved along the movement direction X towards the first gripping means to intersect the second series of elongated elements <NUM> of the second loading base <NUM> with the first series of elongated elements <NUM> of the first loading base <NUM>. Advantageously, the second series of elongated elements <NUM>, as intersected with the first series of elongated elements <NUM>, is placed at an equal and preferably lower height than the height at which the first series of elongated elements <NUM> is arranged.

Advantageously, with the second gripping means <NUM> intersected with the first gripping means <NUM>, the first upper jaw <NUM> is placed in its open configuration to allow the second gripping means <NUM> to pick up the pouch wrapping.

For this purpose, the second gripping means <NUM>, with the second series of elongated elements <NUM> placed below the first series of elongated elements <NUM> and thus below the pouch wrappings group resting on the first loading base <NUM>, are moved vertically along the second rotation axis Y', so that the second series of elongated elements <NUM> passes between the first series of elongated elements <NUM>, thereby picking up the pouch wrappings group. It is clear that the second gripping means <NUM> pick up the pouch wrappings group in the same angular position in which they are presented by the first gripping means <NUM>, i.e. in particular with the closed bottoms arranged either on one side or on the other side of the second loading base <NUM>.

Advantageously, the movement of the second gripping means <NUM> is numerically controlled by an electronic control unit and is commanded to intersect with the first gripping means <NUM> for a linear distance equal to or greater than the width of the pouch wrapping.

Suitably, in the case where a package is to be made with more than one stack of pouch wrappings, the electronic control unit controls the movement of the second gripping means <NUM> along the movement direction X for a linear distance equal to a multiple of the width of the pouch wrappings. For example, if a pack is to be made with two groups stacks, then the second gripping means <NUM> will move at the intersection of the first gripping means <NUM> by a distance equal to or greater than two times the width of the gripping means. Appropriately, following the pick-up of the pouch wrappings group, the second gripping means <NUM> is moved from its open configuration to the second closed configuration. Advantageously, the first series of elongated elements <NUM> of the first loading base <NUM> are movable towards or away from each other to define a first loading base <NUM> of different width.

Similarly, advantageously, the second series of elongated elements <NUM> of the second loading base <NUM> are movable towards or away from each other to define a second loading base <NUM> of different amplitude.

In a preferred embodiment, the first gripping means <NUM> comprise a support ferrule <NUM> on which the elongated elements <NUM> of the first loading base <NUM> are mounted.

The support ferrule <NUM> is interchangeable by an operator with a ferrule <NUM> having elongated elements <NUM> at different relative spacing.

Advantageously, the second gripping means <NUM> comprise a support crossbar17 extending transversely compared to the second rotation axis Y' and compared to the movement direction X and preferably substantially horizontally, on which the elongated elements <NUM> are fixed. In particular, the elongated elements <NUM> of the second loading base <NUM> are fixed to the support crossbar17 by means of corresponding fixing pillars <NUM> extending parallel to the second rotation axis Y'.

In fact, in accordance with the preferred embodiment illustrated in the attached figures, the support crossbar <NUM> (preferably fixed) is arranged at a higher height than the second loading base <NUM> defined by the second series of elongated elements <NUM>. Therefore, the fixing pillars <NUM> are arranged as a mechanical connection between the support crossbar <NUM> and the elongated elements <NUM> thereof.

Suitably, the support crossbar <NUM> is provided with mechanical coupling means, comprising in particular a plurality of holes <NUM> arranged along its prevailing extension and configured to be occupied by corresponding mechanical coupling counter-means of the fixing pillars <NUM>.

In this way, the operator is able to vary the relative distance between the second series of elongated elements <NUM> of the second loading base <NUM> on the basis of necessity, i.e. on the basis of, for example, a different size of the pouch wrapping.

Advantageously, the machine <NUM> comprises a stacking zone <NUM> configured to receive said stack of pouch wrappings groups is configured to be moved parallel to a substantially horizontal movement direction X to transport said stack towards said packaging means <NUM>.

Advantageously, the stacking zone <NUM> of the machine <NUM> advantageously comprises a platform <NUM> configured to support the pouch wrappings group stacked with each other, arranged by the second gripping means <NUM>.

Advantageously, in accordance with a first embodiment, the platform <NUM> of the stacking zone <NUM> may support a single stack of pouch wrappings group. Advantageously, in accordance with a further embodiment of the present invention, the platform <NUM> of the stacking zone <NUM> may be configured and/or dimensioned to support two or more stacks of pouch wrappings groups.

For the purpose of enabling the unloading of the pouch wrappings groups, the stacking zone <NUM> advantageously comprises stop means <NUM>, extending substantially vertically and configured to act as a stop and/or end-stack for the pouch wrappings group arranged by the second gripping means <NUM>.

More in detail, the second gripping means are configured to be moved along the direction X until reaching the second series of elongated elements <NUM> the stacking zone <NUM>, at a higher height than the stop means <NUM>, as long as the group of pouch casings exceeds, along the movement direction X, the stop barrier means <NUM>.

Advantageously, said second gripping means <NUM> are movable, preferably vertically, at least along said second rotation axis Y' to release said pouch wrappings group above at least one further pouch wrappings group.

Suitably, in other words, with the second series of elongated elements <NUM> beyond the stop means <NUM>, the second gripping means <NUM> are moved vertically along said second rotation axis Y' until the pouch wrappings group supported by the second loading base <NUM> reaches the platform <NUM> or reaches another pouch wrappings group(arranged in another angular position, i.e. with the bottom arranged on the other side).

Upon reaching such a position, the second gripping means <NUM> are moved in the open configuration and thus along the movement direction X. During such movement along the movement direction X, the pouch wrappings group encounters the stop means <NUM> which block their movement, holding them in their position on the platform <NUM>, thus creating a stack of pouch wrappings groups staggered between them, i.e. alternately provided with a different angular position. In other words, the stack of pouch wrappings group is advantageously formed against the stop means <NUM> and the assemblies are arranged such that the bottom of one assembly is overlaid by the openings of a subsequent assembly and vice versa.

Advantageously, the stop means <NUM> comprise at least one pillar <NUM> and preferably two pillars <NUM> parallel to each other and configured to be interposed to the second series of elongated elements <NUM> of the second loading base <NUM> of the second gripping means <NUM>. Advantageously, the at least one pillar <NUM> of the stop means <NUM> comprises, at an upper free end thereof, a wheel <NUM> configured to assist the descent of the pouch wrappings group with the second gripping means and, preferably, to assist the handling of the flexible material layer of the packaging means <NUM>, as described in more detail below. Advantageously, the stop means <NUM> are movable parallel to the movement direction X to push the stack of pouch wrappings group towards the packaging means <NUM>.

The packaging means <NUM> comprise at least one support base <NUM> configured to support the stack of pouch wrappings group pushed by the stop means <NUM> from the stacking zone <NUM>. Suitably, a tract of a flexible material layer <NUM> is interposed between the stop means <NUM> and the support base <NUM> of the packaging means, which extends substantially vertically. More in detail, the layer of flexible material <NUM> is maintained in said vertical position by suitable tensioning means <NUM> comprising at least one reel and preferably two reels <NUM> of flexible material.

In accordance with the embodiment illustrated in the annexed figures, the tensioning means <NUM> comprise two reels <NUM> of flexible material web, preferably rotatably constrained to the support frame <NUM>, around corresponding preferably horizontal and parallel axes of rotation, at one end thereof, located in proximity to the support base <NUM>.

Each reel <NUM> is unrolled in the opposite direction to the other and the free edges of each strip of flexible material are mechanically constrained to each other at the section of flexible material interposed between the stop means <NUM> and the packaging means <NUM>.

Operationally, the stack of pouch wrappings group pushed by the stop means <NUM> intercepts the vertical tract of flexible material <NUM>, which wraps itself around the same stack, partially wrapping it until the stack reaches the support base <NUM> of the packaging means <NUM>.

More in detail, the tract <NUM> of flexible material wraps around a front part of the stack and defines two substantially horizontal or inclined tracts, with the stack placed above the support base <NUM>.

For this purpose, the reels <NUM> of flexible material are unrolled to allow proper wrapping of the stack and preferably are actively unroll by at least one electric motor <NUM> connected to at least one reel <NUM>. Active unrolling of the reels <NUM> obviates the risk that the pulling performed by the pushing of the stop means <NUM> and the tapping of the stack will tear and/or damage the flexible material.

Preferably, the flexible material <NUM> is a plastic material, e.g. transparent, such as a polyethylene or similar.

Suitably, the packaging means <NUM> comprise a sealing and cutting device <NUM> interposed between the stop means <NUM> and the tract <NUM> of flexible material, preferably comprising at least one sealing bar, which extends horizontally transversely compared to the movement direction X and is movable between a raised position in which it allows the passage of the <NUM> pushing the stack of pouch wrappings groups and a lowered position in which it intercepts the substantially horizontal or inclined layers of flexible material and thermally joins and seals them together, thereby creating a horizontal sealing line.

Suitably, the sealing and cutting device <NUM> further comprises at least one cutting bar, arranged parallel to the sealing bar.

Preferably, the sealing and cutting device <NUM> comprises two sealing bars. Preferably, the cutting bar of the sealing and cutting device <NUM> is interposed between the two sealing bars, such that with the sealing and cutting device <NUM> intercepting substantially horizontal or inclined sections of the flexible material seals along the two sealing lines made by the two sealing bars and cuts along a cutting line interposed between the two sealing lines. In this way, the sealing and cutting device <NUM> allows the plastic material to be closed around the stack of pouch wrappings groups and simultaneously joins together the free edges of the plastic material strips unroll from the two reels to define again a vertical tract <NUM> of flexible material intended to be intercepted again by a subsequent stack of pouch wrappings groups.

Suitably, the packaging means <NUM> comprise a heating means <NUM> provided at the support base <NUM> and configured to heat the flexible plastic material wrapping the stack of pouch wrappings group.

Preferably, the plastic material is a shrinkable material, i.e. configured to decrease its extension when exposed to a heat source. Thus, the heating means <NUM> are configured to shrink the plastic material wrapping the stack and thus make a compact and easy to handle and transport package.

Preferably, the heating means <NUM> comprise a device for delivering a flow of hot air, in particular comprising at least one duct <NUM> and preferably two ducts <NUM> arranged on the sides of the support base <NUM>, in particular symmetrically compared to the movement direction X. The ducts <NUM> terminate with exhaust ports facing a volume defined above the support base <NUM> intended to be occupied by the stack wrapped by the flexible material. Advantageously, the discharge outlets of the ducts <NUM> of the heating means <NUM> are configured to emit said flow of hot air over the side edges of the shrinkable plastic material in order to make them retract and thus wrap the stack of pouch wrappings groups.

Advantageously, the packaging means <NUM> comprise at least one covering body <NUM> movable between a position distal to the support base <NUM>, to allow the arrival of the stack wrapped by the plastic material, and a position proximal to the support base in which it covers superiorly (and preferably at least partially also laterally) the volume defined superiorly to the support base <NUM> and thus the stack of pouch wrappings groups. The covering body <NUM> is provided with side openings <NUM> configured to be aligned with the duct discharge outlets <NUM> when in the position proximal to the support base <NUM> to allow the flow of hot air to enter it.

The covering body <NUM> is configured to retain within it the hot air and thus the heat generated by the heating means <NUM>.

Advantageously, the machine <NUM> according to the invention comprises at least one electronic control unit (not illustrated in the appended figures), at which it is configured and/or programmed to control the movement of appropriate handling means mechanically mounted on the support frame.

More in detail, the movement means are configured to move each moving part of the machine <NUM>, for example the movement of the first and second gripping means <NUM>, <NUM> and/or the handling of the stop barrier means <NUM> and/or the movement of the sealing and cutting device <NUM> etc..

Advantageously, the machine <NUM> comprises at least one user interface device, for example a screen and at least one numeric keypad and/or a touch screen, for setting initial working parameters, such as for example the size of the pouch wrappings, the number of group stacks desired in the final package, etc..

Advantageously, the movement of the moving parts of machine <NUM> is carried out in feedback and/or numerical control on the basis of appropriate command signals sent by the electronic control unit.

From what has been said, it is clear that the pouch wrappings machine, according to the invention, is particularly advantageous in that:.

Claim 1:
Machine for packaging pouch wrapping, comprising:
- a support frame (<NUM>) defining an inlet section (<NUM>) for at least one pouch wrapping group and an outlet section (<NUM>) for a package of a plurality of pouch wrapping groups;
- first gripping means (<NUM>) mechanically mounted on said support frame (<NUM>) in proximity of said inlet section (<NUM>) and configured and controlled to be movable at least between a loading configuration in which they receive said pouch wrapping group , a first unloading configuration and a second unloading configuration rotated about <NUM>° compared to said first unloading configuration;
- packaging means (<NUM>) mechanically mounted on said support frame (<NUM>) and configured to receive said stack of pouch wrapping group and wrap said stack with at least one layer of flexible material and thus make said package;
- second gripping means (<NUM>) mechanically mounted on said support frame (<NUM>);
said machine being characterised in that said second gripping means (<NUM>) are configured and controlled to be movable between a first configuration in which they pick up said pouch wrapping group directly from said first gripping means (<NUM>) in said first unloading configuration with said pouch wrapping group in a first angular position, and alternatively, in said second unloading configuration with said pouch wrapping group in a second angular position, and a second configuration in which they release said pouch wrapping group to form a stack of pouch wrapping group;
said stack of pouch wrapping group being made with pouch wrapping groups stacked vertically together in the first angular position and in the second angular position in an alternating manner.