WO2004002852A1

WO2004002852A1 - Multicompartment bag

Info

Publication number: WO2004002852A1
Application number: PCT/FR2003/001971
Authority: WO
Inventors: Stéphane MATHIEU; Jean-Claude Jammet
Original assignee: Soplaril
Priority date: 2002-06-28
Filing date: 2003-06-26
Publication date: 2004-01-08
Also published as: WO2004002852A8; FR2841537A1; AU2003260630A1; FR2841537B1; ES2365113T3; ATE505413T1; EP1517845A1; DE60336722D1; EP1517845B1

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

MULTI-COMPARTMENT BAG

FIELD OF THE INVENTION

The invention relates to the field of flexible packaging, typically sachets. These sachets are formed from single or multi-layer strip materials, comprising wholly or in part plastic films. It concerns bags with multiple compartments.

STATE OF THE ART

The concept of products packaged in bags with several compartments is already known.

Thus, there are already sachets linked together, these sachets forming an uncut strip forming an association of sachets, so as to group products "in a chain".

There is also known a combination of standard sachets using a removable clamp, so as to artificially create two compartments, the clamp being removed when using the products contained in the two sachets to typically allow the mixing of these two products.

Also known are two-compartment flat sachets. Such bags are made up of three films sealed together, creating two separate cells or compartments. We also know sachets of the "Doypack" ® type, sachets which include an attached base allowing the sachet to stand upright. These sachets, formed from plastic films, are manually tearable during a first opening.

PROBLEMS POSED On the one hand, there is an ever increasing demand for "Doypack" ® type sachets, these sachets increasingly replacing other traditional types of packaging, be they metal cans, cardboard boxes, etc., taking into account in particular their high mechanical characteristics and possibly their high barrier properties.

Indeed, these sachets have many advantages compared to traditional packaging, and in particular advantages of volume and weight, the volume before filling or after consumption of the product being that of a very thin flat sachet, for example l '' order of 1 mm.

On the other hand, there is also an increasing demand for processed products, whether in the field of culinary art or in other fields, in which case, it is often necessary to package two or more components or constituents separately. form of juxtaposition of products, constituents which are to be used, or mixed, simultaneously when the contents of the package are consumed. It can for example be the several ingredients of a cooking recipe or a dessert.

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

DESCRIPTION OF THE INVENTION

According to the invention, the multi-compartment bag, typically intended for the packaging of at least one product, comprises a main bag typically intended for packaging a main product and comprising two side walls or so-called main faces formed from a main film. folded, or two main films, with sealed side edges, said main bag typically comprising at its upper end a so-called main filling orifice provided with facing sealing pads or upper edges forming a main closing means, said main bag comprising at its edge or lower end an attached bottom sealed in said walls main and provided with a vertical station means, and is characterized in that it comprises at least one secondary wall integral with said main bag, so as to form at least one secondary compartment provided with a so-called secondary orifice allowing access said secondary compartment, typically for the packaging of a so-called secondary product, said secondary orifice typically comprising a secondary closure means.

Said main sachet can typically be of the "Doypack" ® type, and in this type of sachet, said vertical station means can comprise a reinforcement forming a fold with an "A" shaped profile, said reinforcement being typically formed by a portion of reinforcing strip folded or by two portions of reinforcing 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. On the other hand, once the reinforcement has been deployed, in particular under the action of the weight of the contents of the sachet, the latter acquires a seat or base which gives it a stable vertical station. Generally, the main sachet according to the present invention is a sachet 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 which it is advisable to separate before use, but which on the contrary should be gathered or found to be united when using at least one of the packaged products.

The numerous 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. FIG. 1 represents, in top view, two sachets of the "Doypack" ® type corresponding to two sachets of the state of the art before cutting along the transverse cutting lines (120) in dotted lines. The hatched areas correspond to the heat-sealing ranges.

Figures 2a to 2g, 3a to 3c, 4a, 4b, 6a, 6b, 7a, 7b, 8a, 8b, 9, 10a to 10c, 1a to 1 ld, 12a to

12d, 13, 14 and 15b relate to multi-compartment sachets (1) according to the invention, FIGS. 5a, 5b, 15a, 15c and 15d relate to sachets of the "Doypack" ® type according to the state of the technique.

FIG. 2a represents a view of a bag (1) in section perpendicular to the main side walls or main faces (20) and to the attached base (25), the bag (1) being represented in a vertical station, as in the figures which follow.

Figure 2b, similar to Figure 2a, shows a bag (1) whose secondary compartment (30B ') is external to the main bag (2).

Figure 2c is an enlarged view of the upper part of Figure 2b surrounded by dotted lines.

Figure 2d is a view, similar to Figure 2a, of another bag modality (1).

Figure 2e corresponding to the same bag (1) as that of Figure 2d, but open. Figures 2f and 2g illustrate, in cross section, the structure of the upper end

(23) of the bag (1) of Figures 2d and 2a respectively.

Figure 3a is similar to Figure 2a, but corresponds to another bag modality

(1).

Figure 3b is a side view of the bag (1) of Figure 3a. Figure 3c is similar to Figure 2f or 2g and illustrates the structure of the upper end (23) of the bag (1) of Figure 3a.

FIG. 4a, similar to FIG. 3a, illustrates another mode of bag (1).

Figure 4b, similar to Figures 3c or 2f, illustrates the structure of the end (23) bag (1) of Figure 4a. Figures 5a and 5b are schematic views, respectively from above and in cross section along a vertical plane, of the stacks (10) of films (6, 6 ') and of the reinforcing strip (8, 8') during the manufacture of "Doypack" ® type sachets - manufacture of two sachets at the same time - according to a process of the state of the art.

Figures 6a and 6b are similar to Figures 5a and 5b and correspond to the manufacture of sachets (1) of the type shown in Figure 8b. Figures 7a and 7b are similar to Figures 6a and 6b and correspond to the manufacture of another type of bag (1).

Figures 8a and 8b, similar to Figure 2a, show another modality of a sachet

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

Figures 10a to 10b are similar to Figures 6b and 7b, but with a relative position of the secondary films (7, 7 ') and reinforcement strip (8, 8') reversed. FIG. 10c is similar to FIGS. 6b and 7b, but corresponds to another method of manufacturing a sachet (1).

Figures 1 la to 1 ld relate to sachets (1) provided with caps (5)

Figures 1a to 1c are schematic views similar to Figure 3b.

Figure l ia illustrates the case where the main bag and the secondary compartment have separate plugs (5) and (5 ').

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

FIG. 1 ie illustrates the case where the main bag and the secondary compartment are provided with a mixing plug (51), such a mixing plug (51) being shown in section in FIG. 1d.

Figure 12a, similar to 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 ') .

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

Figure 12c, corresponding to Figure 12b, schematically shows the upper end (23) after tearing the upper part (291).

Figure 12d is similar to Figure 12c, but after separation of the walls and the two parts of the "Zip" (28). Figure 13, similar to Figure 12a, shows a bag (1) comprising two secondary compartments (30 A ') whose opening is close to the lower end (24) of the main bag (2). Figure 14, similar to Figure 3b, shows a bag (1), with a secondary wall (3A ') external to the main bag (2), as illustrated in Figure 3a), but with a side port (31) .

FIG. 15a is a side view, similar to FIGS. 3b and 14, of a sachet according to the state of the art, schematically illustrating the sealed parts represented by hatching, a rectangle in dark line schematically representing the added base (25).

FIG. 15b is a partial view, similar to FIGS. 5a, 6a and 7a, of the stack (10) of films during the production of sachets (1) according to FIG. 10a. Figure 15c is a partial view similar to Figure 5b and shows, with reference to Figure 15a, the arrangement of the main films (6, 6 ') and the reinforcing strip (8). FIG. 15d is a partial view showing a section of the sachet of FIG. 15a, along the dotted line of FIG. 15a, so as to illustrate the variable height of the sealing area (250) which fixes the bottom forming the reinforcement (25 ) and the lower end of the side walls (20).

DETAILED DESCRIPTION OF THE INVENTION

According to the invention, said secondary wall (3) can preferably be secured to said main bag (2) by at least one securing 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 shown in FIG. 1, and which does not include a common sealing area, exhibited a less stable vertical station than that of the sachets (1) which include a common sealing range and of which numerous methods are illustrated in the figures. Advantageously, said securing edge (32) can be opposite with / or correspond to at least one of said sealed edges of said main bag, typically one of the side sealed 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 side 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 a additional sealing step compared to those necessary to form said main bag (2). Thus, the main sachets and the secondary compartment form an assembly secured over at least their common height, which tends to increase the holding, the rigidity and the vertical station of the assembly, as has been observed by the applicant.

Most often, said secondary orifice (31) may be typically close to said main orifice (22), said compartment (30) having a bottom (36), typically close to said lower end (24), comprising a lower edge (33) sealed to said main bag (2).

However, as illustrated in FIG. 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 (36), typically close to said end upper (23) of said main bag (2), comprising an upper edge (35) sealed to said main bag (2). This modality can be advantageously used for packaging solid articles or objects, for example notices, without risking seeing them damaged or soiled during filling of the main bag or during consumption of the main product (4A). According to one embodiment of the invention, said secondary compartment (3) can be a compartment (30A, 30 A ') comprising said secondary wall (3 A, 3 A') for one of its faces and one of said main side walls (20 ) for its other side. This method has been illustrated in particular in FIGS. 3 a, 4a, 9, 12c and 13.

According to another embodiment of the invention, said secondary compartment (3) can be a compartment (30B, 30B ') comprising two secondary side walls (3B, 3B'), formed either from a folded secondary film (7) with sealed side edges, ie from two secondary films (7, 7 ′) with bottom and sealed side edges. This method has been illustrated in particular in FIGS. 2a, 2b, 2e, 2d, 8a, and 8b.

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

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

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

According to another variant of a bag (1), and as illustrated in FIGS. 2d and 2e, said main bag (2) may not include a filling orifice (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 which said main product is packaged in said secondary compartment (30), said upper edges (35) of said facing secondary walls (3C) forming said orifice secondary (31), said main bag forming an external pocket (2 ') for said compartment forming an internal pocket or secondary compartment (30C). In this case, said main bag (2) may comprise means for maintaining the vertical hold of said bag during the consumption of said main product, typically chosen from: vertical station means with permanent spring effect, an orifice (251) or a valve allowing the inflation of said main bag (2), so as to allow an air intake as the volume of said secondary compartment decreases, a decrease which can possibly take place without air intake, so to have a product packaging of the "airless" type, which makes it possible to avoid oxidation or contamination of products sensitive in particular to oxygen.

According to another embodiment of the invention, said secondary compartment (30A ', 3 OB') can be external to said main compartment (2).

This method has been illustrated in FIGS. 2b, 3b (marks in parentheses), 12a, 13 and 14. As illustrated in FIG. 14, said secondary orifice (31) can 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) ensuring communication between said main bag (2) and said secondary compartment (30 A "), so as to typically be able to manually extract said main product (4 A), said secondary compartment (30A") not comprising said secondary product, said secondary wall (3 A ') temporarily obstructing said lateral orifice (200), possibly in leaktight manner. In this case, said main product (4A) can typically be formed by a stack of typically flat, folded and interleaved products (40), one end (41) of the product (40) above said stack passing through said lateral orifice. (200), so that the manual gripping of said end (41) of a product causes the separation of the product above said stack, and the passage through said lateral orifice of one end of said next product in said stack. Figure 4a is an illustration of this variant.

Advantageously, said main bag (2) can comprise an easy first opening means (29), allowing the tearing of said main side walls (20), typically along a predetermined tear line (29, 39), the main closing means ( 27) and secondary closure (37) being typically constituted by a sealing area.

The invention is not limited to a particular means of easy first opening. Any known means can be used, whether it is a weakening line, a partially incised line, in particular by laser, or even an oriented or channeled tear line. 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 part (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), in particular in the case where the main closing means (27) and / or secondary closure (37) comprises / comprise a peelable sealing layer, or optionally a layer peelable and reclosable sealing, one or the other, or any equivalent means, capable of forming said main (27) and / or secondary (37) closing means.

In the case where the main closing means (27) and secondary closing means (37) consist of a sealing area which requires tearing of the bag (1) during the first opening, and as illustrated for example in FIGS. 2a , 2c, 2f and 3c, said main bag and / or said secondary compartment may include / may comprise a means of temporary reclosure (28) and / or (38), typically formed by a "Zip" strip or an adhesive layer by cold pressing.

According to the invention, said main side walls (20, 20A) can be formed from mono 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 external 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 include an accessory intended for facilitate the use of said sachet (1), typically a plug (5), optionally comprising a bi-orifice (50) or a mixer (51), as illustrated in FIGS. 1a to 1d.

The sachets (1) according to the invention have a capacity ranging, for information, 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).

Another object of the invention is constituted by a method of manufacturing a multi-compartment bag (1) according to the invention. In this process: a) a stack of the various elements constituting said bag is formed, 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 unwinding at least one film, optionally folded, in said long direction or in the transverse 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 optionally in the transverse direction, of a folded reinforcing strip (8) or of two strips (8, 8 '), said portion (s) of tape (8, 8') being placed between said portions of film (6, 6 '), b) the elements or accessories (38) intended to facilitate the opening or re-closing of the main bag and / or of the secondary compartment, said accessories under shape of a strip being preferably introduced in the long direction, the individualized accessories being preferably introduced in the transverse direction, c) there is optionally in said stack a heat shield (9), typically in the form of a portion of film or of non-sealable plate, in order to avoid sealing of two contiguous layers of said stack, d) said stack is compressed between sealing jaws arranged so as to typically form all of the welds, in particular of the bottom (250), of said edges sealing (21), and said securing edge (32), e) after removal of said heat shield, when the latter is present, said sachet (1) is cut out, after having possibly formed notches intended to orient the tearing of the sachet 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 linen, towels, liquid and pasty products such as cake doughs , typically a marbled cake, cake dough with corresponding dish, detergents or chemicals, powdered products, sauces such as ketchup, mustard, cosmetics, promotional items or gifts, instruction manuals.

EXAMPLES OF REALIZATION

The sachets (1) according to the invention corresponding to FIGS. 2a, 2b, 2d, 2e, 3a, 3b 4a, 8a, 8b, 9, 12a, 13 and 14 were produced according to the methods illustrated in FIGS. 6a, 6b, 7a, 7b, 10a, 10b, 10c, and 15b.

Reminder of the prior art:

The Doypack ® type sachet and the corresponding manufacturing method, according to the prior art, have been shown in FIGS. 5a, 5b, 15a, 15c and 15d.

Figures 5a and 5b are schematic views, respectively from above and in cross section along a vertical plane, of the film stacks (6, 6 ') and of the reinforcement strip (8, 8') in the manufacture of sachets of type "Doypack" ® - manufacture of two sachets at the same time - according to a process of the state of the art. With the representation of FIG. 5a, the films (6,6 ') and reinforcements (8, 8') arrive from the left in the form of a strip. The hatched part of FIG. 5a corresponds to the peripheral heat-sealing zones. The line (110) is a longitudinal cutting line to separate a first sachet from a second sachet produced simultaneously, while the line (120) is a transverse cutting line to separate the manufactured sachets from the upstream strips.

FIG. 15a is a side view of a sachet according to the state of the art, a view similar to that of FIG. 3b, schematically illustrating the sealed parts represented by hatching, a rectangle in dark line schematically representing the bottom reported (25). FIG. 15c is a partial view which represents, with reference to FIG. 15a, the arrangement of the main films (6, 6 ′) and of the reinforcing strip (8). FIG. 15d is a partial view showing a section of the sachet of FIG. 15a, along the dotted line of FIG. 15a, so as to illustrate the variable height of the sealing area (250) which fixes the bottom forming the reinforcement (25 ) and the lower end of the side walls (20).

The structure of the sachets (1) produced according to the invention:

Method a according to Figures 2a and 2g:

FIG. 2a represents a view of a bag (1) in section perpendicular to the main side walls or main faces (20) and to the attached bottom (25), the bag being shown in a vertical station, as in the following figures.

According to the method of Figure 2a, the bag (1) comprises a main bag (2) which contains a secondary compartment (30, 30B).

Figure 2g illustrates, in cross section, the structure of the upper end (23) of the bag (1) of Figure 2d.

Mode b according to Figures 2b and 2c:

In the mode of FIG. 2b, the secondary compartment (30B ¹ ) is external to the main bag (2).

Figure 2c is an enlarged view of the upper part of Figure 2b surrounded by dotted lines. The secondary compartment (3 OB ') is secured to the main bag (2) by a sealing zone forming said securing edge (32), and comprises a provisional reclosing means (38).

Modality c according to Figures 2d, 2e and 2f: Figure 2d corresponds to a "closed" bag (1) while Figure 2e corresponds to the same open bag (1). This bag (1) comprises a secondary compartment (30C), the secondary walls (3C) of which 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 method, only the secondary compartment (30C) comprises a product (4B), the main bag (2 ') comprising an orifice or a valve (251) allowing the air to enter, so that the bag ( 1) keeps its standing position and its appearance outside whatever the consumption rate of the product (4B) contained in the secondary compartment (3 OC).

Figure 2f illustrates the structure of the upper end (23) of the bag (1) of Figure 2d, with a tear line (29) delimiting an upper part (291) removed during a first opening and a lower part , provided with a provisional reclosing means (38) at the secondary orifice (31).

Modality d and d according to Figures 3a, 3b and 3c:

In this mode, the bag (1) comprises a secondary wall (3, 3 A) located inside the main bag (2).

The neighboring case (modality of) has been shown with references in brackets where the secondary wall (3A ') is located outside the main bag (2).

Figure 3b, which is a side view of the bag (1) of Figure 3a, schematically illustrates the sealed parts represented by hatching, a rectangle in dark lines representing the bottom reported (25).

FIG. 3 c illustrates the structure of the upper end (23) of the bag (1): in the present case, the opening of the main bag (2) and that of the secondary compartment (30 A) comprise a means of temporary closing , noted respectively (28) and 38).

Mode e according to Figures 4a and 4b:

In this sachet mode (1), on the one hand, the product (4 A) contained in the main sachet (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 (30 A ") which can contain, for example, a notice. This secondary compartment (30 A') is initially closed by a sealing pad (27) which is opened when of the first opening, and comprises a provisional reclosing means (28) represented in the form of a "Zip", that is to say a cooperation of male and female elements situated opposite one another, as shown in diagrammatic on the Figure 4a. 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 include a tear line (29, 39), the product (4A) being extracted laterally and not by this upper end.

Mode f according to Figures 8a and 8b:

In these figures, the bag (1) has been shown open. In this bag (1), the main side 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) in FIG. 8a, FIG. 8b corresponding to the opposite situation. This sachet structure can be advantageous whether it is during the packaging of the products (4A, 4B) or during their consumption or use.

Modality g according to FIG. 9: FIG. 9 is a top view of a bag (1) with its filling holes open, in the case of a bag of the type shown in FIG. 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 (3 A) from 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 the side edges (34), but also by a side seal between the upper end (26) of the main walls (20A) and the upper edge (35) of the secondary wall ( 3 A), portions noted (221) and (310) respectively of these upper ends and of the upper edge (35) being heat sealed. This heat sealing can be carried out for example using a heat shield (9) as illustrated in a process represented in FIGS. 10a, 10b and 15b, in which, the bags being oriented with the lateral opening and not central as in Figures 6b and 7b, it is possible to introduce laterally a heat shield.

Mode h according to Figures 1 la to 1 ld: These figures 1 la to 1 ld relate to sachets (1) provided with plugs (5) - plugs which are typically fixed by sealing during the manufacture of the sachet (1), and introduced laterally in the case of a method of manufacturing as illustrated in FIGS. 10a, 10b or 15b, so as to be secured to the walls of the sachets (1), with or without retaining a main and / or secondary filling orifice, the filling being able to be carried out by the plug, at least when there is a separate cap for each bag or compartment.

Figures 1a to 1c are schematic views similar to Figure 3b. Figure l ia illustrates the case where the main bag and the secondary compartment have separate plugs (5) and (5 ').

Figure l ie 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 in Figure ld.

Mode i according to Figures 12a to 12d:

FIG. 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 (30 A '), each of the side walls (20 ) of the main bag forming the inner wall of the secondary compartments.

FIG. 12b is a side view of the upper end (23) of the bag showing a transverse line of tear (29), typically initiated by a notch (290), so as to separate the upper part (291) during the first opening. FIG. 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 FIG. 12d is similar in FIG. 12c, but after separation of the walls and of the two parts of the "Zip" or of a means equivalent to the "Zip", for example of the two cold sealing and reclosable areas.

Mode i according to figure 13 This modality is analogous to the previous one (modality i according to FIG. 12a), but is distinguished in that the opening of the two secondary compartments (30 A ') is close to the lower end (24) of the main bag ( 2), and not from its upper end (23), as in FIG. 12a.

K mode according to figure 14:

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

Some examples of the manufacture of sachets (1) according to the invention:

Method a according to Figures 10a and 10b:

In this mode, the secondary films (7, 7 ′ are folded films.

Figures 10a to 10b are similar to Figures 6b and 7b, but with a relative position of the secondary films (7, 7 ') and reverse reinforcement strip (8, 8'): the reinforcement strips (8, 8 ') are central in the production line (10) shown in Figures 10a and 10b, while they are lateral in Figures 6b and 7b, and vice versa as regards the secondary films (7, 7 '). The reinforcing strip comprises two separate strips (8 and (8 ') in FIG. 10a, while there is only one strip (8) in FIG. 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 FIG. 10c, the reinforcing strips (8, 8 ′) are lateral, as in FIGS. 6b and 7b, the bag (1) obtained according to the process shown diagrammatically in FIG. 10c being similar to that of FIG. 3a. Mode f according to Figures 6a and 6b:

Figures 6a and 6b, similar to Figures 5a and 5b, correspond to the manufacture of sachets (1) of the type shown in 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 shown in FIG. 5 a, the cross-hatched zones intended to form the securing 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) from stacking of films (6, 6 ', 7, 8 or 8') to be heat sealed.

In FIG. 6b, the arrows represent the heat-sealing zones and the movement of the sealing jaws.

Mode f according to Figures 7a and 7b:

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

Another modality according to FIG. 15b: This modality provides, as illustrated in FIGS. 10a or 10b, that the reinforcing strip (8, 8 ′) is central, so that, the opening of the sachets being typically oriented towards the outside. , 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

The advantages of sachets (1) according to the invention are numerous: - on the one hand, they make it possible to obtain packaging 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 significantly modify the production rates of the standard process for manufacturing "Doypack" ® sachets, and using standard manufacturing devices, with minimal modifications,

- in addition, the sachets according to the invention allow, depending on the choice of films forming the internal walls, either to completely isolate the product (4A) contained in the main sachet

(2), of the product (4B) contained in the secondary compartment (30), or, on the contrary, to allow a transfer of material between said main sachet and said secondary compartment. FIG. 4a illustrates an example of material transfer, but it is also possible to have a secondary compartment (30) containing a product capable of migrating in a controlled manner towards the main bag (2), so as to store the product (4A ) contained in the main sachet (2), a certain level of humidity or any other product, despite repeated opening of said main sachet,

- In addition, the invention allows the manufacture of sachets (1) of the "airless" type, much lighter and less bulky than packaging of the "airless" type known elsewhere, - finally, the invention opens the way to a large variety of sachets (1), so as to be able to meet all kinds of needs by differentiating the sachets in particular according to these needs. In addition, the large number of modalities or variants of sachets (1) according to the invention further makes it possible to personalize the sachets according to customers.

LIST OF REFERENCES

Multi-compartment bag 1

Manufacturing line or bench 10 Long direction in the manufacturing process 11

Longitudinal cutting line 110

Crosswise in the manufacturing process 12

Cross cutting line 120

Front or front of line 13 Back of line 14

Sides of line 15 Main bag 2, 2 '

Main side walls or faces 20, 20 A

Lateral opening 200

Sealed side edges 21 Main filling opening 22, 22 '

Sealing ranges or upper edges 220

Side sealing area 221

Upper end 23

Lower end 24 Bottom added with reinforcement 25

Sealing range of 25 and 20,250

Valve or air inlet in 2 '251

Upper edge 26

Main closing medium - sealing range 27 Temporary closing medium - Zip 28

1st opening method - tear line 29

Tear initiation notch 290

Upper part removed during first opening ... 291

Secondary wall (s) 3.3A, 3A ', 3B, 3B', 3C Secondary compartment (s) 30.30A, 30A ', 30A ", 30B, 30B', 30C

Secondary port 31, 31 '

Sealing area 310

Joining border at 2 32

Bottom border 33 Side borders 34

Upper border 35

Background 36

Secondary locking medium - sealing range. 37

Means of temporary closing -zip 38 Means of first opening - tear line 39

Products 4 Main product 4A

Secondary product 4B

Stack of products 40

End of product 41 Cap 5

Cap with bi-orifices 50

Mixer cap 51

Main films 6.6 '

Secondary film - folded film 7, 7 'Reinforcement strip 8, 8'

Heat shield 9

Claims

1. Multi-compartment bag (1), typically intended for packaging at least one product (4), comprising a main bag (2), typically intended for packaging a main product (4A), and comprising two side walls or faces said main (20) formed from a folded main film, or two main films (6, 6 '), with sealed side edges (21), said main bag (2) typically comprising at its upper end (23) a so-called main filling orifice (22) provided with facing sealing pads or upper edges (220) forming a main closing means (27), said main bag (2) comprising at its edge or lower end (24) a bottom attached to said main walls and fitted with vertical station means, characterized in that it comprises at least one secondary wall (3) integral with said main bag (2), so as to form at least one secondary compartment (30) with a hole said secondary (31) allowing access to said secondary compartment (30), typically for the packaging of a so-called secondary product (4B), said secondary orifice (31) typically comprising a secondary closure means (37), and in that that said main bag and / or said secondary compartment comprises / comprise an easy first opening means.

2. Bag according to claim 1, in which said main bag (2) is typically of the "Doypack" ® type, and in which said vertical station means comprises a reinforcement forming a fold with a profile in the shape of "Λ" (25), said reinforcement (25) being typically formed by a portion of folded reinforcement strip or by two portions of reinforcement strips secured by sealing.

3. Bag according to claim 2 wherein said secondary wall (3) is integral with said main bag (2) by at least one securing edge (32) sealed to said main bag (2), so that said main bag ( 2) and said secondary compartment have a common sealing range.

4. Bag according to claim 3 wherein said securing edge (32) is opposite or corresponds to at least one of said sealed edges of said main bag, typically one of the side sealed 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).

5. Bag according to claim 4 wherein said secondary compartment (30) comprises two sealed side edges (34), said side edges (34) and said side edges (21) being typically opposite or superimposed, so as to form said compartment secondary (30) without an additional sealing step compared to those necessary to form said main bag (2).

6. Bag according to claim 5 wherein said secondary orifice (31) is typically adjacent to said main orifice (22), said compartment (30) having a bottom (36), typically adjacent to said lower end (24), comprising an edge lower (33) sealed to said main bag (2).

7. Bag according to claim 5 wherein said secondary orifice (31) is typically close to said lower end (24) of said main bag (2), said secondary compartment (30) having a bottom (36), typically close to said end upper (23) of said main bag (2), comprising an upper edge (35) sealed to said bag (2).

8. Bag according to any one of claims 1 to 7 wherein said secondary compartment (3) is a compartment (30 A, 30 A ') comprising said secondary wall (3 A, 3A') for one of its faces and one of said walls main side (20) for its other face.

9. Bag according to any one of claims 1 to 7 wherein said secondary compartment (3) is a compartment (30B, 30B ') comprising two side walls secondary (3B, 3B '), formed either from a folded secondary film (7) with sealed side edges, or from two secondary films (7, 7') with bottom and sealed side edges.

10. Bag according to any one of claims 1 to 9 wherein said secondary compartment (30 A, 30B) is included in said main compartment (2).

11. Bag according to claims 7, 8 and 10 wherein said secondary wall (3) is a secondary wall (3A) forming a partition of said main bag (2) leading to the formation of two compartments (30 A) and (20 A ), said upper edge (35) of said secondary wall (3 A) forming a partition of said main filling orifice (22), one face of said upper edge facing an upper edge forming said main orifice (22 ') , the other face of said upper edge opposite the other upper edge forming said secondary orifice (31 ').

12. Bag according to claim 11, in which each face of said upper edge and said upper edge opposite said face comprises a lateral sealing zone (221, 310) contiguous to said lateral edges (34) or lateral edge (21), so as to facilitate the spacing between said upper edge and said upper edges and access to said main orifices (22 ') and secondary orifices (31').

13. Bag according to claims 7, 9 and 10 wherein said secondary wall (3) is a secondary wall (3B, 3B ') itself forming said secondary compartment (30B, 30 B'), and in which the two walls main side (20) and the two secondary side walls (3) are of different length, so that said main orifice (22) and said secondary orifice (31) are offset from each other, l one being close to said upper end, the other being located between said upper end and said lower end.

14. Bag according to claims 9 and 10 wherein said main bag. (2) does not include a filling orifice (22), the upper edges (220) of said walls side (20) being sealed at the upper edges (35) of the two secondary walls (3C), and wherein said main product is packaged in said secondary compartment (30), said upper edges (35) of said secondary walls facing (3C) forming said secondary orifice (31), said main bag forming an external pocket (2 ') for said compartment forming an internal pocket or secondary compartment (30C).

15. Bag according to claim 14 wherein said main bag (2) comprises a means for maintaining the vertical hold of said bag during the consumption of said main product, typically chosen from: a vertical station means with a permanent spring effect, a orifice (251) or a valve allowing the inflation of said main bag said main bag, so as to allow an air intake as the volume of said secondary compartment decreases.

16. Bag according to any one of claims 1 to 9 wherein said secondary compartment (30A ', 30B') is external to said main compartment (2).

17. Bag according to claim 16 wherein said secondary orifice (31) is parallel to said lateral edge (21).

18. Bag according to any one of claims 16 to 17 wherein one of the main side walls (20) is a side wall (20A) forming a support for said secondary wall (3A ') and comprising a side orifice (200) ensuring communication between said main bag (2) and said secondary compartment (30 A "), so as to typically be able to manually extract said main product (4A), said secondary compartment (30A") not comprising said secondary product, said secondary wall (3A ' ) temporarily obstructing said lateral orifice (200), possibly in a sealed manner.

19. Bag according to claim 18 wherein said main product (4 A) is formed by a stack of products (40) typically flat, folded and interlaced, a tip (41) of the product (40) above said stack passing through said lateral orifice (200), so that the manual gripping of said end (41) of a product causes the separation of the product above said stack, and the passage by said lateral orifice of an end of said next product in said stack.

20. Bag according to any one of claims 1 to 19 wherein said easy first opening means allows the tearing of the main and / or secondary walls, typically along a predetermined tear line (29), the main closing means (27) and secondary closure (37) typically being constituted by a sealing pad.

21. Bag according to any one of claims 1 to 19 wherein the main closing means (27) and / or secondary closing means (37) comprise a peelable sealing layer, or optionally a peelable and reclosable sealing layer forming said means of main (27) and / or secondary (37) closure.

22. Bag according to any one of claims 1 to 20, in which said main bag and / or said secondary compartment comprises a provisional reclosing means (28) and / or (38), typically formed by a "Zip" strip or an adhesive layer. by cold pressing.

23. Bag according to any one of claims 1 to 22 wherein said main side walls (20, 20A) are 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.

24. Bag according to any one of claims 1 to 23 in which said wall or said secondary wall (s) (3, 3 A, 3 A ', 3 A ", 3B, 3B', 3C) is (are) chosen from a material capable of being sealed on one or on two sides depending on the type of bag, and typically from: PE, PP, a multilayer material based on PE or PP or comprising PE or PP on its external faces, optionally comprising a layer of barrier material, typically aluminum or EVOH.

25. Bag according to any one of claims 1 to 24 wherein said main bag (2) and / or said secondary compartment (30, 30A, 30 A ', 30A ", 30B, 30B', 30C) comprises / comprise an accessory intended to facilitate the use of said sachet (1), typically a stopper (5), optionally comprising a bi-orifice (50) or a mixer (51).

26. A method of manufacturing a multi-compartment bag according to any one of claims 1 to 25 wherein: a) a stack is formed of the various 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 unwinding at least one film, possibly folded, in said long direction or in the transverse direction, said reinforcement (25) being formed by a portion of one or two reinforcement strips (8, 8 ') obtained by unwinding, in the long direction, or possibly in the cross direction, with a folded reinforcing strip (8) or two strips (8, 8 '), said strip portion (s) (8, 8') being placed between said portions film (6, 6 '), b) there are in said stack, the elements or accessories (38) intended to facilitate the opening closing or re-closing the main bag and / or the secondary compartment, said accessories in the form of a strip being preferably inserted in the long direction, the individualized accessories being preferably introduced in the transverse direction, c) optionally available in said stack a heat shield (9), typically in the form of a portion of film or non-sealable plate, in order to avoid the sealing of two contiguous layers of said stack, d) said stack is compressed between sealing jaws arranged so as to typically form all of the welds, in particular of the bottom (250), of said sealing edges (21), and of said securing edge (32), e) after removal of said heat shield, when the latter is present, said bag (1) is cut out, after having possibly formed notches intended to orient the tearing of the bag during a first opening.

27. Application of the sachet according to any one of claims 1 to 25 to the packaging of products typically chosen from: folded articles such as wipes, towels, liquid and pasty products such as cake doughs, typically a marbled cake, cake doughs with corresponding dish, detergents or chemicals, powdered products, sauces such as ketchup, mustard, cosmetic products, promotional items or gifts, instruction manuals.