EP1517845B1 - Multicompartment bag - Google Patents

Abstract

The invention concerns a bag (1) comprising a main bag (2) provided with two main side walls (20) with sealed lateral edges (21) and a filling orifice (22), said main bag (2) including at its edge or lower end (24) a base provided with means for standing upright. The invention is characterized in that it comprises at least one secondary wall (3) integral with the main bag (2) so as to form at least one secondary compartment (30), typically for packaging a so-called secondary product (4B), said secondary orifice (31) typically including a secondary closure means (37). The bag provides the advantage of the possibility of packaging separated products.

Description

FIELD OF THE INVENTION

The invention relates to the field of flexible packaging, typically bags. These pouches are formed from monolayer or multilayer web materials, comprising all or part of plastic films.

It concerns multi-compartment bags.

STATE OF THE ART

The concept of packaged products in multi-compartment sachets is already known.

Thus, there are already bags bound together, these bags forming an uncut strip forming a combination of bags, so as to group products "rosary".

Also known is a combination of standard bags with a removable clip, so as to artificially create two compartments, the clip being removed at the time of use of the products contained in the two bags to typically allow the mixing of these two products.

Flat bi-compartment bags are also known. Such sachets are composed of three films welded together thus creating two separate cells or compartments.

In addition, "Doypack" type sachets are known, sachets which comprise an attached bottom allowing a vertical station of the sachet. These bags, formed from plastic films, are manually torn at a first opening.

PROBLEMS POSED

On the one hand, there is an ever-increasing demand for "Doypack" type sachets, these bags being increasingly substituted for other types of traditional packaging, be they cans, cardboard boxes, etc., especially in view of their high mechanical characteristics and possibly their high barrier properties.

Indeed, these bags have many advantages over traditional packaging, including volume and weight advantages, the volume before filling or after consumption of the product is that of a flat bag of very thin, for example the order of 1 mm.

On the other hand, there is also an increasing demand for elaborate products, whether in the field of culinary arts or in other fields, in which case two or more components or constituents must often be separately conditioned. juxtaposition form of products, constituents that are to be used, or to mix, simultaneously when consuming the contents of the package. It can be for example several ingredients of a cooking recipe or a dessert.

There is therefore a need for Doypack®-type bags comprising several compartments. In addition, it is important that such bags are economical to manufacture.

DESCRIPTION OF THE INVENTION

The subject of the invention is a multi-compartment bag according to claim 1

Said main bag may be typically of the "Doypack" ® type, and in this type of bag, said vertical station means may comprise a reinforcement forming an "A" shaped profile fold, said reinforcement being typically formed by a portion of folded reinforcing strip or by two portions of reinforcement strips secured by sealing. In this type of packaging, said reinforcement is folded when the bag is empty, so that the empty bag is flat and occupies a small volume or bulk. By cons, once the reinforcement deployed, especially under the action of the weight of the contents of the bag, the latter acquires a base or base which gives it a stable vertical station.

In general, the main bag according to the present invention is a bag containing the vertical station means, preferably of the "Doypack" ® type.

These means make it possible to form one or more compartments or complementary pockets, so as to be able to separate the products that should be separated before use, but that should instead meet or find together at the time of use of at least one of the packaged products.

The many advantages of the invention will appear in the following description and in the figures.

DESCRIPTION OF THE FIGURES

All the figures relate to sachets of the "Doypack" ® type.

The figure 1 represents, in top view, two bags of "Doypack" ® type corresponding to two bags of the state of the art before cutting along the transverse cutting lines (120) in dashed lines.

The hatched portions correspond to the heat sealing ranges.

The figure 9 is relative to a multi-compartment bag (1) according to the invention. The Figures 2a to 2g , 3a to 3c , 4a, 4b , 6a, 6b , 7a, 7b , 8a, 8b , 10a to 10c, 11a to 11d , 12a to 12d, 13 , 14 and 15b relate to embodiments of unclaimed multi-compartment pouches. The Figures 5a, 5b , 15a, 15c and 15d are relative to "Doypack" type sachets according to the state of the art

The figure 2a is a view of a bag (1) in section perpendicular to the main side walls or main faces (20) and the bottom (25), the bag (1) being shown in a vertical station, as in the figures that follow.

The figure 2b , analogous to the figure 2a , represents a bag (1) whose secondary compartment (30B ') is outside the main bag (2).

The Figure 2c is an enlarged view of the upper part of the figure 2b surrounded by dots.

The figure 2d is a view, similar to the figure 2a , of another modality of sachet (1).

The figure 2e corresponding to the same bag (1) as that of the figure 2d but open.

The figure 2f and 2g illustrate, in cross-section, the structure of the upper end (23) of the bag (1) of Figures 2d and 2a respectively.

The figure 3a is analogous to the figure 2a , but corresponds to another packet mode (1).

The figure 3b is a side view of the bag (1) of the figure 3a .

The figure 3c is analogous to figure 2f or 2g and illustrates the structure of the upper end (23) of the bag (1) of the figure 3a .

The figure 4a , analogous to the figure 3a , illustrates another packet mode (1).

The figure 4b , analogous to Figures 3c or 2 F , illustrates the structure of the end (23) bag (1) of the figure 4a .

The Figures 5a and 5b are schematic views, respectively from above and in cross-section along a vertical plane, of the stackings (10) of films (6, 6 ') and of the reinforcement band (8, 8') during the manufacture of type bags. "Doypack" ® - manufacture of two bags at a time - according to a method of the state of the art.

The Figure 6a and 6b are similar to Figures 5a and 5b and correspond to the manufacture of bags (1) of the type represented on the figure 8b .

The Figures 7a and 7b are similar to Figures 6a and 6b and correspond to the manufacture of another packet mode (1).

The Figures 8a and 8b , analogous to the figure 2a , represent another packet mode (1).

The figure 9 is a top view of a bag (1) with its open filling holes, in the case of a bag of the type shown in FIG. figure 3 a with a secondary wall (3A) contained in the main compartment (2).

The Figures 10a to 10b are similar to figures 6b and 7b , but with a relative position of the secondary films (7, 7 ') and reinforcement band (8, 8') reversed.

The figure 10c is analogous to figures 6b and 7b , but corresponds to another mode of manufacture of sachet (1).

The Figures 11a to 11d relate to sachets (1) with stoppers (5)

The Figures 11a to 11c are schematic views analogous to the figure 3b .

The figure 11a illustrates the case where the main bag and the secondary compartment are provided with separate plugs (5) and (5 ').

The figure 11b illustrates the case where the main bag and the secondary compartment are provided with a plug (50) with two orifices.

The figure 11c illustrates the case where the main bag and the secondary compartment are provided with a mixing plug (51), such mixing plug (51) being shown in section on the figure 11d .

The figure 12a , analogous to the figure 3a , illustrates the case where the bag (1) comprises a main bag (2) and, on either side of this main bag (2), two secondary compartments (30A ').

The figure 12b is a side view of the upper end (23) of the bag (1) of the figure 12a .

The figure 12c , corresponding to the figure 12b , schematically represents the upper end (23) after tearing the upper part (291).

The figure 12d is analogous to the figure 12c , but after separation of the walls and the two parts of the "Zip" (28).

The figure 13 , analogous to the figure 12a , represents a bag (1) comprising two secondary compartments (30A ') whose opening is close to the lower end (24) of the main bag (2).

The figure 14 , analogous to the figure 3b , represents a bag (1), with a secondary wall (3A ') external to the main bag (2), as illustrated in FIG. figure 3a ), but with a secondary orifice (31) lateral.

The figure 15a is a side view, similar to figures 3b and 14 of a sachet according to the state of the art, schematically illustrating the sealed portions represented by hatching, a dark line rectangle schematically representing the attached bottom (25).

The figure 15b is a partial view, similar to figures 5a , 6a and 7a , of the stack (10) of films during the manufacture of bags (1) according to the figure 10a .

The figure 15c is a partial view similar to the figure 5b and represents, next to the figure 15a , the arrangement of the main films (6, 6 ') and the reinforcing strip (8).

The figure 15d is a partial view showing a section of the bag of the figure 15a , according to the dashed line of the figure 15a , so as to illustrate the variable height of the sealing area (250) which secures the reinforcing bottom (25) and the lower end of the side walls (20).

DETAILED DESCRIPTION OF THE INVENTION

According to the invention, said secondary wall (3) may preferably be secured to said main bag (2) by at least one fastening edge (32) sealed to said main bag (2), so that said main bag (2,2 ') and said secondary compartment (30, 30A, 30A', 30A ", 30B, 30B ', 30C) have a common sealing range.
Indeed, it has been observed that a set of two sachets such as that represented on the figure 1 , and which does not include a common sealing range, had a vertical station less stable than that of the bags (1) which comprise a common sealing range and of which many modalities are illustrated in the figures.

Advantageously, said fastening edge (32) may be opposite to or correspond to at least one of said sealed edges of said main bag, typically one of the sealed side edges (21) of said main bag (2), so that said secondary wall (3) can be secured to said main bag (2) without an additional sealing step compared to those necessary to form said main bag (2).
Typically, said secondary compartment (30) may comprise two sealed lateral edges (34), said side edges (34) and said side edges (21) being typically facing or superimposed, so as to form said secondary compartment (30) without additional sealing step with respect to those necessary for forming said main bag (2). Thus, the main bags and the secondary compartment form an assembly secured to at least their common height, which tends to increase the strength, rigidity and vertical station of the assembly, as has been observed by the applicant.

Most often, said secondary orifice (31) can be typically close to said main orifice (22), said compartment (30) having a bottom, typically close to said lower end (24), comprising a bottom edge sealed to said main bag (2). ).
However, as shown on the figure 13 said secondary orifice (31) can be typically close to said lower end (24) of said main bag (2), said compartment (30) having a bottom, typically close to said upper end (23) of said main bag (2), comprising an upper rim (35) sealed to said main bag (2). This modality can advantageously be used to package solid articles or objects, for example leaflets, without risking seeing them damaged or soiled when filling the main bag or when consuming the main product (4A).

According to one embodiment of the invention, said secondary compartment (3) may be a compartment (30A, 30A ') comprising said secondary wall (3A, 3A') for one of its faces and one of said main side walls (20) for its other face.
This modality has been illustrated in particular on figures 3a , 4a , 9 , 12c and 13 .

According to another embodiment, said secondary compartment (3) may be a compartment (30B, 30B ') comprising two secondary side walls (3B, 3B'), formed either from a folded secondary film (7) with sealed lateral edges or from two secondary films (7, 7 ') with sealed bottom and side edges.
This modality has been illustrated in particular on Figures 2a, 2b , 2nd, 2d , 8a, and 8b .

According to another modality, said secondary compartment (30A, 30B) can be included in said main compartment (2), as illustrated in the Figures 2a , 2nd , 2d , 3a , 8a, 8b and 9 .

According to a variant of bag (1) illustrated on the figure 9 said secondary wall (3) may be a secondary wall (3A) forming a partition of said main bag (2) leading to the formation of two compartments (30A) and (20A), said upper edge (35) of said secondary wall ( 3A) forming a partition of said main filling orifice (22), a face of said upper edge facing an upper edge forming said main orifice (22 '), the other face of said upper edge facing the another upper edge forming said secondary orifice (31 ').
It may be advantageous for each face of said upper edge and said upper edge facing said face to comprise a lateral sealing zone (221, 310) contiguous with said side edges (34) or side edge (21), so as to facilitate the spacing between said upper edge and said upper edges and access audits audits main (22 ') and secondary (31') ports.

According to another variant of pouch (1), said secondary wall (3) may be a secondary wall (3B, 3B ') forming itself said secondary compartment (30B, 30B'), and in which the two main side walls (20) and the two side walls secondary members (3) are of different length, so that said main orifice (22) and said secondary orifice (31) are offset relative to each other, one being close to said upper end, another being located between said upper end and said lower end. Such an offset may in certain cases facilitate the filling of the main bag and the secondary compartment or compartments, and / or the consumption of the products contained in these bags or compartments.
This variant has been illustrated on Figures 8a and 8b .

According to another variant of sachet (1), and as illustrated on the Figures 2d and 2e said main bag (2) may not comprise a filling port (22), the upper edges (220) of said side walls (20) being sealed at the upper edges (35) of the two secondary walls (3C), and in wherein said main product is packaged in said secondary compartment (30), said upper edges (35) of said facing side walls (3C) forming said secondary port (31), said main bag forming an outer pocket (2 ') for said compartment forming an internal pocket or secondary compartment (30C). In this case, said main bag (2) may comprise a means for maintaining the vertical holding of said bag during the consumption of said main product, typically selected from: permanent vertical spring station means, an orifice (251) or a valve for inflating said main bag (2), so as to allow an air inlet as the volume of said secondary compartment decreases, which reduction can possibly take place without air intake, so to have a product packaging type "airless", which prevents the oxidation or contamination of sensitive products including oxygen.

According to another embodiment, said secondary compartment (30A ', 30B') may be external to said main compartment (2).
This modality has been illustrated on figures 2b , 3b (parentheses), 12a, 13 and 14. As shown on the figure 14 said secondary orifice (31) may be parallel to said lateral edge (21).

According to a variant of this modality, one of the side walls (20) may be a side wall (20A) forming a support for said secondary wall (3A ') and comprising a lateral orifice (200) providing communication between said main bag (2) and said secondary compartment (30A "), so that it can typically manually extract said main product (4A), said secondary compartment (30A") not including said secondary product, said secondary wall (3A ') temporarily occluding said lateral orifice ( 200), possibly sealingly.
In this case, said main product (4A) may typically be formed by a stack of typically flat, folded and interlaced products (40), a tip (41) of the product (40) above said stack passing through said side port (200), such that manual gripping of said tip (41) of a product results in separation of the product over said pile, and passage through said side port of one end of said next product into said stack.
The figure 4a is an illustration of this variant.

Advantageously, said main bag (2) may comprise a means of easy first opening (29), allowing the tearing of said main lateral walls (20), typically according to a predetermined tear line (29, 39), the main closure means ( 27) and secondary closure (37) typically being a sealing pad.

The invention is not limited to a particular means of easy first opening. Any known means can be used, whether it is a line of weakening, a line partially incised, in particular by laser, or a tear line oriented or channeled. This tear line may include a notch or notch (290) forming a primer for the first opening tear, which leads to the separation of an upper portion (291).
However, the opening of the main bag (2, 2 ') and / or that of the secondary compartment (30) may not require tearing of one end of the bag (1), especially in the case where the main closure means (27) and / or secondary closure (37) comprises / comprise a peelable seal layer, or optionally a layer releasable and resealable seal, one or the other, or any equivalent means, capable of forming said main (27) and / or secondary (37) closure means.

In the case where the main closing means (27) and secondary closing means (37) consist of a sealing range which requires tearing of the bag (1) during the first opening, and as illustrated for example on the Figures 2a, 2c , 2 F and 3c , said main bag and / or said secondary compartment may comprise / may comprise a temporary reclosing means (28) and / or (38), typically formed by a strip "Zip" or a cold pressure adhesive layer.

According to the invention, said main lateral walls (20, 20A) can be formed from monolayer or multilayer films, typically chosen from multilayer complexes based on PET, OPP, OPA, PE, PP, aluminum, or extruded films. based on PE, PP, PA, EVOH.
Similarly, said wall or said secondary wall (s) (3, 3A, 3A ', 3A ", 3B, 3B', 3C) may or may be chosen from a material capable of being sealed on a or on two sides depending on the type of compartment, and typically among: PE, PP, a multilayer material based on PE or PP or comprising PE or PP on its outer faces, optionally comprising a layer of barrier material, typically aluminum or EVOH.
Generally, the outer walls are formed of printed films

Whatever the modality or variant of the invention, said main bag (2) and / or said secondary compartment (30, 30A, 30A ', 30A ", 30B, 30B', 30C) may / may comprise an accessory intended to facilitate the use of said bag (1), typically a plug (5), optionally comprising a bi-orifice (50) or a mixer (51), as illustrated on the figures 11 the to 11 d.

The sachets (1) according to the invention have a capacity ranging, for example, from 50 ml to 5000 ml, and typically from 100 ml to 2000 ml, the largest capacities being able to be used for the packaging of low density products. relative.

In general, the capacity of the main bag is at least equal to that of the secondary compartment (s).

1. a) on forme un empilage des différents éléments constituant ledit sachet, lesdites parois latérales étant formées à partir de portions de film (6, 6') obtenus par déroulement dans un sens long d'un film éventuellement imprimé (6, 6'), ladite paroi secondaire étant formée à partir d'une portion de film (7, 7') obtenue par déroulement d'au moins un film, éventuellement plié, dans ledit sens long ou dans le sens travers, ledit renfort (25) étant formé par une portion d'une ou deux bandes de renfort (8, 8') obtenue par déroulement, dans le sens long, ou éventuellement dans le sens travers, d'une bande de renfort pliée (8) ou de deux bandes (8, 8'), ladite /lesdites portion(s) de bande (8, 8') étant placée(s) entre lesdites portions de film (6, 6'),
2. b) on dispose dans ledit empilage, les éléments ou accessoires (38) destinés à faciliter l'ouverture ou la re-fermeture du sachet principal et/ou du compartiment secondaire, lesdits accessoires sous forme d'une bande étant de préférence introduits dans le sens long, les accessoires individualisés étant de préférence introduits dans le sens travers,
3. c) on dispose éventuellement dans ledit empilage un écran thermique (9), typiquement sous forme d'une portion de film ou de plaque non scellable, afin d'éviter le scellage de deux couches contiguës dudit empilage,
4. d) ledit empilage est comprimé entre des mors de scellage disposés de manière à former typiquement l'ensemble des soudures notamment du fond (250), desdits bords de scellage (21), et ladite bordure de solidarisation (32),
5. e) après retrait dudit écran thermique, lorsque ce dernier est présent, ledit sachet (1) est découpé, après avoir formé éventuellement des encoches destinées à orienter la déchirure du sachet lors d'une première ouverture.

Another object of the invention is constituted by a method of manufacturing a multi-compartment bag (1) according to the invention. In this process:

1. a) forming a stack of the different elements constituting said bag, said side walls being formed from film portions (6, 6 ') obtained by unwinding in a long direction an optionally printed film (6, 6'), said secondary wall being formed from a portion of film (7, 7 ') obtained by unfolding at least one film, possibly folded, in said long direction or in the cross direction, said reinforcement (25) being formed by a portion of one or two reinforcing strips (8, 8 ') obtained by unwinding, in the long direction, or possibly in the cross direction, a folded reinforcing strip (8) or two strips (8, 8 '), said band portion (s) (8, 8') being placed between said film portions (6, 6 '),
2. b) there are in said stack, the elements or accessories (38) to facilitate the opening or re-closure of the main bag and / or the secondary compartment, said accessories in the form of a strip being preferably introduced into the long direction, the individualized accessories being preferably introduced in the cross direction,
3. c) there is optionally provided in said stack a heat shield (9), typically in the form of a non-sealable film or plate portion, to avoid sealing two adjacent layers of said stack,
4. d) said stack is compressed between sealing jaws arranged to form typically all welds including the bottom (250), said sealing edges (21), and said fastening edge (32),
5. e) after removal of said heat shield, when the latter is present, said bag (1) is cut, after possibly forming notches for guiding the tear of the bag during a first opening.

Another object of the invention is constituted by the application of the sachet (1) according to the invention to the packaging of products typically chosen from: folded articles such as wipes, towels, liquid and pasty products such as cake dough, typically a marble cake, cake dough with matching dish, detergent products or chemicals, powdered products, sauces such as ketchup, mustard, cosmetics, promotional items or gifts, instructions.

EXAMPLES OF REALIZATION

Bags (1) corresponding to Figures 2a, 2b , 2d, 2nd , 3a , 3b 4a , 8a, 8b, 9 , 12a, 13 and 14 were manufactured according to the processes illustrated on the Figures 6a, 6b , 7a, 7b , 10a, 10b, 10c , and 15b .

Recall of the prior art:

The Doypack ® type bag and the corresponding manufacturing method, according to the prior art, have been represented on the Figures 5a, 5b , 15a, 15c and 15d .

The Figures 5a and 5b are schematic views, respectively from above and in cross-section along a vertical plane, of film stacks (6, 6 ') and of the reinforcing strip (8, 8') in the manufacture of "Doypack" type sachets - manufacture of two bags at a time - according to a method of the state of the art.

With the representation of the figure 5a , the films (6,6 ') and reinforcements (8, 8') arrive from the left in the form of a band. The hatched portion of the figure 5a corresponds to the peripheral areas of heat sealing. The line (110) is a longitudinal cutting line for separating a first bag from a second bag manufactured simultaneously, while the line (120) is a transverse cutting line for separating the bags made from the upstream strips.

The figure 15a is a side view of a bag according to the state of the art, a view similar to that of the figure 3b , schematically illustrating the sealed portions represented by hatching, a dark line rectangle schematically representing the attached bottom (25).

The figure 15c is a partial view that represents, next to the figure 15a , the arrangement of the main films (6, 6 ') and the reinforcing strip (8).

The figure 15d is a partial view showing a section of the bag of the figure 15a , according to the dashed line of the figure 15a , so as to illustrate the variable height of the sealing area (250) which secures the reinforcing bottom (25) and the lower end of the side walls (20).

The structure of the pouches (1) manufactured Modality a according to FIGS. 2a and 2g:

The figure 2a is a view of a bag (1) in section perpendicular to the main side walls or main faces (20) and the bottom (25), the bag being shown in a vertical station, as in the figures that follow.
According to the modality of the figure 2a the bag (1) comprises a main bag (2) which contains a secondary compartment (30, 30B).
The figure 2g illustrates, in cross-section, the structure of the upper end (23) of the bag (1) of the figure 2d .

Mode b according to FIGS. 2b and 2c:

In the modality of the figure 2b , the secondary compartment (30B ') is outside the main bag (2).
The Figure 2c is an enlarged view of the upper part of the figure 2b surrounded by dots. The secondary compartment (30B ') is secured to the main bag (2) by a sealing zone forming said securing border (32), and comprises a temporary reclosing means (38).

Modality c according to FIGS. 2d, 2e and 2f:

The figure 2d corresponds to a bag (1) "closed" while the figure 2e corresponds to the same bag (1) open. This bag (1) comprises a secondary compartment (30C) whose secondary walls (3C) are secured, by their upper ends (35), to the upper sealing edges (220) of the main walls (20) of a main bag ( 2 '). According to this modality, only the secondary compartment (30C) comprises a product (4B), the main bag (2 ') comprising an orifice or a valve (251) allowing air to enter, so that the bag ( 1) maintain standing and appearance outside the consumption rate of the product (4B) contained in the secondary compartment (30C).
The figure 2f illustrates the structure of the upper end (23) of the bag (1) of the figure 2d , with a tear line (29) delimiting an upper portion (291) removed during a first opening and a lower portion, provided with a temporary reclosing means (38) at the secondary orifice (31).

Modality d and d 'according to FIGS. 3a, 3b and 3c:

In this embodiment, the bag (1) comprises a secondary wall (3, 3A) located inside the main bag (2).
The neighboring case (modality of) where the secondary wall (3A ') is located outside the main bag (2) is represented with reference marks in parentheses.
The figure 3b which is a side view of the bag (1) of the figure 3a , schematically illustrates the sealed portions represented by hatching, a dark line rectangle representing the attached bottom (25).
The figure 3c illustrates the structure of the upper end (23) of the bag (1): in this case, the opening of the main bag (2) and that of the secondary compartment (30A) comprise a temporary reclosing means, noted respectively (28). ) and 38).

Modality e according to FIGS. 4a and 4b:

In this packet mode (1), on the one hand, the product (4A) contained in the main bag (2) is extracted by a lateral opening (200) made in the side wall (20), and on the other hand , the secondary wall (3A '), which is external to the main bag (2) closes the opening (200); however, the secondary wall (3A ') defines a secondary compartment (30A ") which may contain, for example, a notice, which secondary compartment (30A') is initially closed by a sealing pad (27) which is opened during the first opening, and comprises a temporary reclosing means (28) represented in the form of "Zip", that is to say a cooperation of male and female elements located opposite each other, as shown schematically on the figure 4a .

The figure 4b illustrates the structure of the upper end (23) of the bag (1). In the present case, the structure of this end does not comprise a tear line (29, 39), the product (4A) being extracted laterally and not by this upper end.

Modality f according to FIGS. 8a and 8b:

In these figures, the bag (1) has been shown open. In this bag (1), the main lateral walls (20), like the secondary walls (3B), are of different length, so that the main filling orifice (22) and the secondary filling orifice (31) are offset: the main orifice (22) being located lower than the secondary orifice (31) on the figure 8a , the figure 8b corresponding to the opposite situation. This bag structure can be interesting whether it is during the packaging of the products (4A, 4B) or during their consumption or use.

Modality g according to FIG. 9:

The figure 9 is a top view of a bag (1) with its open filling holes, in the case of a bag of the type shown in FIG. figure 3 a with a secondary wall (3A) contained in the main bag (2). In order to facilitate the separation of the upper edge (35) of the secondary wall (3A) of the two side walls (20A) to form the filling orifices, the secondary wall (3A) is secured to the side walls (20A), not only by sealing the side edges (21) and side edges (34), but also by side sealing between the upper end (26) of the main walls (20A) and the upper edge (35) of the secondary wall (3A ), noted portions (221) and (310) respectively of these upper ends and the upper edge (35) being heat sealed.
This heat-sealing may be carried out for example by means of a heat shield (9) as illustrated in a process shown in FIGS. Figures 10a, 10b and 15b , in which, the bags being oriented with the lateral and non-central opening as on
the figures 6b and 7b it is possible to introduce a heat shield laterally.

Modality h according to FIGS. 11 a to 11 d:

These Figures 11a to 11d relate to sachets (1) with stoppers (5) - plugs which are typically sealed during manufacture of the sachet (1), and introduced laterally in the case of a manufacturing method as illustrated in FIGS. Figures 10a, 10b or 15b , so as to be secured to the walls of the bags (1), whether or not maintaining a main and / or secondary filling opening, the filling can be performed by the cap, at least when there is a separate cap for each bag or compartment.
The Figures 11a to 11c are schematic views analogous to the figure 3b .
The figure 11a illustrates the case where the main bag and the secondary compartment are provided with separate plugs (5) and (5 ').
The figure 11b illustrates the case where the main bag and the secondary compartment are provided with a plug (50) with two orifices.
The figure 11c illustrates the case the main bag and the secondary compartment are provided with a mixing plug (51), such a mixing plug (51) being shown in section on the figure 11d .

Modality i according to FIGS. 12a to 12d:

The figure 12a illustrates the case where the bag (1) comprises a main bag (2) and, on either side of this main bag (2), two secondary compartments (30A '), each of the side walls (20) of the main bag forming the inner wall of the secondary compartments.
The figure 12b is a side view of the upper end (23) of the bag showing a transverse tear line (29), typically initiated by a notch (290), so as to separate the upper portion (291) during the first opening.
The figure 12c schematically represents the end (23) after tearing the upper part (291), before the opening of the reclosing means (28) which is provided with the main orifice (22), while the figure 12d is analogous to the figure 12c but after separation of the walls and the two parts of the "Zip" or a means equivalent to the "Zip", for example two cold sealing and reclosable range.

Modality i according to the pattern 13:

This modality is analogous to the previous one (modality i according to the figure 12a ), but differs in that the opening of the two secondary compartments (30A ') is close to the lower end (24) of the main bag (2), and not its upper end (23), as on the figure 12a .

Modality k according to Figure 14:

The figure 14 represents a bag (1), with a secondary wall (3A ') external to the main bag (2), as illustrated in FIG. figure 3a ), but with a secondary orifice (31) and a lateral secondary closure means (37) facing one of the lateral edges (21) of the main bag (2). The arrow with the mark (31) illustrates the filling direction of the secondary compartment (30A ') or access to its contents (4B), while the arrow with the marker (22), 90 ° from the previous one, illustrates the filling direction of the main bag (2) or access to its contents (4A).

Some examples of bag making (1) : Modality a according to FIGS. 10a and 10b:

In this mode, the secondary films (7, 7 'are folded films.
The Figures 10a to 10b are similar to figures 6b and 7b , but with a relative position of the secondary films (7, 7 ') and reinforcing tape (8, 8') inverted: the reinforcement strips (8, 8 ') are central in the production line (10) shown in FIGS. Figures 10a and 10b , while they are lateral on the figures 6b and 7b and reciprocally with regard to the secondary films (7, 7 '). The reinforcing strip comprises two distinct strips (8 and (8 ') on the figure 10a , while there is only one band (8) on the figure 10b , which strip is then cut longitudinally along the cutting line (110).

Mode of according to Figure 10c:

In this case, the secondary film (7) is exterior.
In the figure 10c , the reinforcing strips (8, 8 ') are lateral, as on the figures 6b and 7b , the bag (1) obtained according to the process schematized by the figure 10c being similar to that of the figure 3a .

Modality f according to FIGS. 6a and 6b:

The Figure 6a and 6b , similar to Figures 5a and 5b , correspond to the manufacture of bags (1) of the type represented on the figure 8b .
In this case, a folded secondary film (7) is unwound between the main films (6) and (6 '). The weld zones comprise, in addition to the peripheral zones represented on the figure 5a cross-hatched areas intended to form the fastening edge (32). These transverse zones are typically formed using a heat shield or a non-sealing film (9), these zones being formed for example before the formation of the peripheral sealing zones, so as to be able to temporarily introduce / remove the screen (9). stacking the films (6, 6 ', 7, 8 or 8') to be heat sealed.
On the figure 6b the arrows represent the heat sealing zones and the movement of the sealing jaws.

Modality f according to FIGS. 7a and 7b:

In this variant of the previous embodiment, the folded secondary film (7) has been replaced by two films (7) and 7 ').

Another modality according to Figure 15b:

This modality provides, as illustrated on the Figures 10a or 10b , that the reinforcing strip (8, 8 ') is central, so that, since the opening of the bags is typically oriented outwards, it is thus possible to introduce into the bag, if necessary, a heat shield ( 9), or to secure to the bag, by a lateral supply, any useful accessory.

ADVANTAGES OF THE INVENTION

• d'une part, ils permettent d'obtenir des emballages présentant une bonne station verticale, ce qui était un des buts de l'invention,
• d'autre part, ils peuvent être obtenus sans avoir à modifier sensiblement les cadences de production du procédé standard de fabrication des sachets "Doypack" ®, et en utilisant les dispositifs de fabrication standard, moyennant des modifications minimes,
• en outre, les sachets selon l'invention permettent, selon le choix des films formant les parois internes, soit d'isoler totalement le produit (4A) contenu dans le sachet principal (2), du produit (4B) contenu dans le compartiment secondaire (30), soit, au contraire, de permettre un transfert de matière entre ledit sachet principal et ledit compartiment secondaire. La figure 4a illustre un exemple de transfert de matière, mais il est également possible d'avoir un compartiment secondaire (30) contenant un produit apte à migrer de manière contrôlée vers le sachet principal (2), de manière à conserver au produit (4A) contenu dans le sachet principal (2), un certain taux d'humidité ou de tout autre produit, en dépit d'une ouverture répétée dudit sachet principal,
• de plus, l'invention permet la fabrication de sachets (1) de type "airless", beaucoup plus légers et moins encombrants que les emballages de type "airless" connus par ailleurs,
• enfin, l'invention ouvre la voie à une grande variété de sachets (1), de manière à pouvoir répondre à toutes sortes besoins en différenciant les sachets notamment en fonction de ces besoins. En outre, le grand nombre de modalités ou de variantes de sachets (1) selon l'invention rend en outre possible une personnalisation des sachets en fonction des clients.

The advantages of the bags (1) according to the invention are numerous:

• on the one hand, they make it possible to obtain packages having a good vertical station, which was one of the aims of the invention,
• on the other hand, they can be obtained without having to modify substantially the production rates of the standard "Doypack" bag manufacturing process, and by using the standard manufacturing devices, with minimal modifications,
• in addition, the bags according to the invention allow, depending on the choice of the films forming the inner walls, to completely isolate the product (4A) contained in the main bag (2), the product (4B) contained in the secondary compartment (30), or, on the contrary, to allow a transfer of material between said main bag and said secondary compartment. The figure 4a illustrates an example of transfer of material, but it is also possible to have a secondary compartment (30) containing a product able to migrate in a controlled manner to the main bag (2), so as to keep the product (4A) contained in the main bag (2), a certain moisture content or any other product, despite repeated opening of said main bag,
• moreover, the invention allows the manufacture of sachets (1) of "airless" type, much lighter and less bulky than "airless" type packaging known elsewhere,
• finally, the invention opens the way to a wide variety of bags (1), so as to meet all kinds of needs by differentiating the particular bags according to these needs. In addition, the large number of modalities or variants of sachets (1) according to the invention also makes it possible to personalize the bags according to the customers.

LIST OF REFERENCES

Multi-compartment bag 1 Line or manufacturing bench 10 Long meaning in the manufacturing process 11 Longitudinal cutting line 110 Cross-direction in the manufacturing process 12 Transverse cutting line 120 Front or front of the line 13 Back of the line 14 Sides of the line 15 Main bag 2, 2 ' Main side walls or faces 20, 20A Lateral orifice 200 Sealed side edges 21 Main filling port 22, 22 ' Beaches or top sealing edges 220 Side sealing area 221 Upper end 23 Bottom end 24 Backed up with reinforcement 25 Sealing range of 25 and 20 250 Valve or air inlet in 2 ' 251 Upper edge 26 Main closure means - sealing range 27 Temporary reclosing means - Zip 28 1st opening way - tear line 29 Notch tear primer 290 Upper part removed during the first opening 291 Secondary wall (s) 3.3A, 3A ', 3B, 3B', 3C Secondary compartment (s) 30,30a, 30A ', 30A ", 30B, 30B', 30C Secondary hole 31, 31 Side sealing area 310 Border of solidarity to 2 32 Lateral borders 34 Upper border 35 Secondary closure means - sealing range 37 Temporary reclosing means -zip 38 Way of first opening - tear line 39 products 4 Main product 4A Secondary product 4B Stack of products 40 Product end 41 Plug 5 Stopper with bi-orifices 50 Mixing cap 51 Main films 6,6 ' Secondary film - folded films 7, 7 ' Reinforcing tape 8, 8 ' Thermal screen 9

Claims (13)

1. Multi-compartment sachet (1), designed for conditioning at least one product (4), including a main sachet (2), typically designed to condition a main product (4A), and including two side walls or faces known as main side walls or faces (20) made from a folded main film, or from two main films (6, 6'), with sealed side edges (21), said main sachet (2) including at its upper end (23) a main filling opening (22) equipped with upper sealing areas or edges opposite (220) forming a main means of closure (27), said main sachet (2) including on its lower edge or end (24) an extra base piece sealed to said main walls and equipped with a means enabling it to stand upright, in which:

   a) the sachet includes at least one secondary wall (3) interdependent of said main sachet (2), so as to form at least one secondary compartment (30) equipped with an opening referred to as secondary (31) giving access to said secondary compartment (30), typically for conditioning a so-called secondary product (4B), said secondary opening (31) including a secondary means of closing (37),

   b) said main sachet and/or said secondary compartment include(s) a means of easy first opening,

   c) said means for standing upright include a reinforcement forming a fold with an "A" shaped profile (25), said reinforcement (25) being typically formed by a portion of folded reinforcement strip or by two portions of reinforcement strips made interdependent by sealing,

   d) said secondary compartment (30, 30A) is included in said main sachet (2), said secondary wall (3) being a secondary wall (3A) forming a partition of said main sachet (2) leading to the formation of two compartments, the upper border (35) of said secondary wall (3A) forming a partition of said main filling opening (22), a face of said upper border opposite an upper edge forming said main opening (22'), the other face of said upper border opposite the other upper edge forming said secondary opening (31'),

   and characterized in that each face of said upper border and said upper edge opposite said face includes a side sealing zone (221, 310) contiguous to said side sealed edges (21), so as to facilitate the spacing between said upper border and said upper edges and access to said main (22') and secondary (31') openings.
2. Sachet according to claim 1 in which said secondary wall (3) is interdependent of said main sachet (2) by at least one interdependence border (32) sealed to said main sachet (2), so that said main sachet (2) and said secondary compartment have a common sealing area.
3. Sachet according to claim 2 in which said interdependence border (32) corresponds to at least one of said sealed edges of said main sachet, typically one of the sealed side edges (21) of said main sachet (2), so that said secondary wall (3) can be made interdependent with said main sachet (2) without an additional sealing stage in relation to those necessary to form said main sachet (2).
4. Sachet according to claim 3 in which said secondary compartment (30) includes two sealed side borders (34), said side borders (34) and said side edges (21) being superimposed, so as to form said secondary compartment (30) without an additional sealing stage in relation to those necessary to form said main sachet (2).
5. Sachet according to claim 4 in which said secondary opening (31) is close to said main opening (22), said secondary compartment (30) having a base, typically adjacent to said lower end (24), including a lower border sealed to said main sachet (2).
6. Sachet according to any of claims 1 to 5 in which said secondary compartment (3) is a compartment (30A) including said secondary wall (3A) as one of its faces and said main side walls (20) as its other face.
7. Sachet according to any of claims 1 to 6 in which said means of easy first opening allow the main and/or secondary walls to be torn, typically along a predetermined tear line (29), the means of main closing (27) and secondary closing (37) being typically made up of a sealing area.
8. Sachet according to any of claims 1 to 7 in which the means of main closing (27) and/or secondary closing (37) include a peel-off sealing layer, or possibly a peel-off and resealable layer forming said means of main (27) and/or secondary (37) closing.
9. Sachet according to claim 7 in which said main sachet and/or said secondary compartment include a means of temporary closure (28) and/or (38), typically formed by a "Zip" strip or an adhesive layer by cold pressure.
10. Sachet according to any of claims 1 to 9 in which said main side walls (20, 20A) are formed from single or multi-layer films, typically selected from among multi-layer complexes containing PET, OPP, OPA, EP, PP, aluminum, or extruded films containing PE, PP, PA, EVOH..
11. Sachet according to any of claims 1 to 10 in which said wall or said secondary wall(s) (3, 3A) is (are) selected from a material able to be sealed on one or two faces depending on the type of sachet, and typically from among: EP, PP, a multi-layer material based on EP or PP or including EP or PP on its outer faces, possibly including a layer of barrier material, typically made of aluminum or EVOH.
12. Sachet according to any of claims 1 to 11 in which said main sachet (2) and/or said secondary compartment (30, 30A, 30A', 30A", 30B, 30B', 30C) include(s) an accessory designed to facilitate the use of said sachet (1), typically a cap (5), possibly including a twin opening (50) or a mixer (51).
13. Application of the sachet according to any of claims 1 to 12 to the conditioning of products typically selected from among: folded articles such as wipes, towels, liquid and pasty products such as cake dough, typically a marble cake, cake dough with corresponding dish, detergents or chemicals, powders, sauces such as ketchup, mustard, cosmetic products, promotional articles or gifts, sets of instructions.

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