EP1110877A1 - Packaging bag - Google Patents

Abstract

The pack (15) is made from a continuous synthetic film layer folded to form two parallel walls with an inner fold along one of them, and transverse welds to join the walls and folds. The layer is cut beyond the folds to make separate bags, with strips (2, 3) of synthetic film welded into the folds to make carrying handles. The strips are inserted parallel to one another into the folds as the packs are made; they extend part-way along the packs and have their free ends joined by a weld (11). The surface (26) of one of the strips has a temporary adhesive coating which allows it to be stuck to the side of the pack and removed as required.

Description

The present invention relates to a packaging bag for articles placed side by side, in particular for diapers, and a method for the making of this bag.

It is known to form a plastic bag from of a continuous film of synthetic material, this film being, at the time of constitution of the bag, folded so as to present two parallel walls and a inner fold along one of its longitudinal edges, so that it presents, seen at the end, a section in the shape of an "M". The bag is made up of arranging two transverse welds on the film and cutting this film beyond these welds. Spacers then come open the bag thus formed while other organs introduce compressed diapers in the bag. The bottom of the bag is then closed by welding or gluing the side walls of the bag.

A strip of synthetic material can be put in place the inside of said inner ply and can be welded to the film by points of welding, this strip being intended to constitute a carrying handle for the bag.

International applications W091 / 08962 and W094 / 20378 illustrate such bags and their manufacturing techniques.

Some bags of the same type receive a material transparent synthetic added on their upper part, which forms a carrying handle. International application W092 / 21582 shows such a bag.

The existing handle systems on this type of bag are considered to be subject to improvement, as regards in particular their possibilities of use by consumers, their use implemented at the time of the bag's manufacture or their capacity to receive information and / or other decorations.

The present invention aims to provide a bag packaging for articles placed side by side, in particular for diapers, including a handle system improved from this point of view.

This bag is of the aforementioned type, comprising a carrying handle from the bag.

According to the invention, the bag comprises at least a second synthetic band, placed at the time of constitution of the bag, parallel to and against the other strip, these two strips extending over only part of the length of the bag; one of these strips is connected by one of its longitudinal ends to one of the walls forming said inner fold while the other strip is connected by its longitudinal end adjacent to the other of the walls forming said fold inside, and the two bands are connected to each other by their others longitudinal ends.

These two bands, thus assembled to the bag and connected one to the other, form a handle for gripping the bag easy to grip by a user. Indeed, the ends of the bands connected to the wall of the bag extend in the plane of the corresponding side face of the bag while that the ends of the bands connected to each other extend in a plane perpendicular to this same plane. The bands are therefore each twisted on a quarter turn, which tends to separate them from each other and to facilitate the introduction of a finger or thumb of the user to grasp the handle.

The latter can be used to hang the bag on the hook that usually includes a department store cart, or to receive a decoration.

The manufacture of the bag also facilitated by this structure of handle in two parallel strips. Indeed, these bands are simply positioned at the appropriate location and fixed to said film, by one of their longitudinal ends, by bonding or welding which can be carried out simultaneously with the transverse welds making it possible to arrange the ends of the bag.

Said bands can be independent of each other and be simply welded or glued to each other at the time of bag making; this welding or this bonding can be carried out before putting the strips on the film, or when this set up. These same bands can also be formed by transverse folding of a primary strip, and are thus connected to each other by the continuity of the material of said primary strip at cross fold level; any joining of the two strips to each other is therefore eliminated.

The bands are preferably connected to the bag in one location longitudinally set back from the location of said transverse welds, so as not to interfere with the holding of these welds transverse to the film.

The bag can advantageously include a line of precut passing near the ends of the bands which are fixed on it, this line delimiting a flap for opening / closing the bag and said ends being integral with this flap.

These bands can be used to pull on said flap in order to easily and quickly separate this flap from the rest of the wall of the bag.

At least one of the bands integral with said flap can include a "repositionable" adhesive, that is to say suitable for allowing several collages / takeoffs of this strip relative to the bag.

This adhesive keeps these strips against the wall of the bag before the first opening of this bag then to maintain said flap in closed position, by gluing the strip (s) against the wall of the bag.

According to a possible embodiment of the invention, the bag includes, in addition to the two aforementioned bands, two other bands attached to it on its side opposite to that on which the two bands are located mentioned above, these two other bands being connected to the bag by one of their longitudinal ends and being connected to each other by their others longitudinal ends, as mentioned above.

The bag thus includes two pairs of bands located in two locations near its ends, forming two handles. One of these handles, or both, can be used for gripping the bag.

The bag may include a precut line and / or a repositionable adhesive as above, so that the handle connected to the flap can be used as pull tab and / or bag closure, as previously stated.

According to another embodiment of the invention, the strips of the two pairs of bands are joined together at the level of their free ends by a junction zone, this zone comprising a frangible portion, in particular a pre-cut line.

The two pairs of strips thus extend along the wall top of the bag before the first opening of the latter, and constitute a handle allowing the gripping of the bag in various ways.

The bag is opened by separating the free ends of the two pairs of bands, at the level of said frangible portion, and in using one of these pairs of bands as a pull tab for tear the wall of the bag.

a) utiliser un film continu de matière synthétique, plié de manière à présenter deux parois parallèles et un pli intérieur le long de l'un de ses bords longitudinaux, de telle sorte que ce film présente, vue en bout, une section transversale en forme de "M" ;

b) placer une première bande de matière synthétique dans ledit pli intérieur ;

c) fixer cette bande à l'une des parois formant ledit pli intérieur,

d) aménager deux soudures transversales sur le film pour assembler lesdites parois et ledit pli, et

e) découper le film au-delà de ces soudures pour individualiser le sac.

The invention also relates to a method for manufacturing the aforementioned bag, this method comprising the following operations, known in themselves:

a) use a continuous film of synthetic material, folded so as to have two parallel walls and an inner fold along one of its longitudinal edges, so that this film has, seen at the end, a cross section in shape of "M";

b) placing a first strip of synthetic material in said inner ply;

c) fix this strip to one of the walls forming said interior fold,

d) arranging two transverse welds on the film to assemble said walls and said fold, and

e) cut the film beyond these welds to individualize the bag.

• une opération (b) consistant à placer une première bande et une deuxième bande de matière synthétique dans ledit pli intérieur, ces bandes étant positionnées parallèlement l'une à l'autre et en recouvrement l'une de l'autre ; et
• une opération (c) consistant à fixer l'une des extrémités longitudinales de l'une de ces bandes à la paroi du pli intérieur adjacente à cette bande et l'une des extrémités longitudinales de l'autre de ces bandes contre la paroi du pli intérieur adjacente à cette autre bande.

According to the invention, the method comprises:

• an operation (b) consisting in placing a first strip and a second strip of synthetic material in said inner ply, these strips being positioned parallel to one another and overlapping one another; and
• an operation (c) consisting in fixing one of the longitudinal ends of one of these strips to the wall of the interior fold adjacent to this strip and one of the longitudinal ends of the other of these strips against the wall of the fold interior adjacent to this other strip.

In case the free ends of the strips are not already connected to each other when the bands were put in place said inner fold, the method also comprises an operation consisting to connect these two free ends of the strips to one another.

pour l'opération (b), utiliser des bandes formées chacune de deux matériaux superposés ayant des températures de soudabilité différentes, chaque bande étant disposée dans ledit pli intérieur de telle sorte que le matériau ayant la température de soudabilité la plus basse soit tourné vers la paroi adjacente de ce pli intérieur, et que, donc, les faces des bandes comportant le matériau ayant la température de soudabilité la plus élevée soient tournées l'une vers l'autre ;

pour l'opération (c), réaliser la fixation desdites extrémités longitudinales des bandes auxdites parois adjacentes du pli intérieur en pinçant l'ensemble film-bandes par l'extérieur au moyen d'organe de pincement susceptible d'être échauffé, et en échauffant cet organe de pincement au-delà de ladite température de soudabilité la plus basse mais en deçà de ladite température de soudabilité la plus élevée.

Preferably, the method also comprises the following operations:

for operation (b), use strips each formed from two superimposed materials having different weldability temperatures, each strip being arranged in said inner ply so that the material having the lowest weldability temperature is turned towards the adjacent wall of this inner ply, and that, therefore, the faces of the strips comprising the material having the highest weldability temperature are turned towards one another;

for operation (c), secure said longitudinal ends of the strips to said adjacent walls of the inner fold by pinching the film-strip assembly from the outside by means of a pinching member capable of being heated, and by heating this pinching member beyond said lowest weldability temperature but below said highest weldability temperature.

These provisions thus make it possible to weld the strips to the film. from the outside of the bag, without welding the strips to each other.

These bands can in particular be made of a material coextruded comprising a layer of polyethylene and a layer of polypropylene.

For a good understanding, the invention is described again below with reference to the appended schematic drawing representing, by way of non-limiting example, three possible embodiments of the bag packaging it relates to.

la figure 2 est une vue en perspective du sac obtenu à partir du film et des bandes montrées à la figure 1, après remplissage ;

la figure 3 est une vue en perspective d'un sac selon une deuxième forme de réalisation ; et

la figure 4 est une vue en perspective d'un sac selon une troisième forme de réalisation.

Figure 1 is a perspective view of a portion of film from which this bag is made, and two strips intended to constitute a carrying handle of the bag;

Figure 2 is a perspective view of the bag obtained from the film and the strips shown in Figure 1, after filling;

Figure 3 is a perspective view of a bag according to a second embodiment; and

Figure 4 is a perspective view of a bag according to a third embodiment.

Figure 1 shows a portion of an elongated synthetic film 1 and two bands 2, 3 made of synthetic material.

The film 1 comprises two parallel walls 5 and an inner fold the along one of its longitudinal edges, formed by two walls 6, 7. The film 1 thus has a section in the shape of an "M", visible by the section transverse of the film 1 shown in FIG. 1.

It follows from the comparison of Figures 1 and 2 that two transverse welds 10 are arranged on the film 1 so as to bond walls 5 between them and walls 6 and 7. It is also deduced from these figures that one of the bands 2 is connected, by a longitudinal end 2a, to the adjacent wall 6, by a weld point close to the weld 10, but set back from it, while the adjacent longitudinal end 3a of the other strip 3 is connected, by an identical welding point, to the adjacent wall 7. The two strips 2, 3 are also welded one to the other. the other, at their opposite longitudinal ends 2b, 3b, according to a transverse line 11.

The film 1 is cut beyond the welds 10 to individualize a bag 15 as shown in Figure 2, this bag 15 having two longitudinal walls 16, comprising the welds 10, two walls side 17 and a top wall 18.

This bag is filled by mechanized operations, consisting of open the bag 15 and engage the articles to be packaged in this bag, especially diapers. These items are compressed before introduction into the bag so that they hold the walls 16 to 18 tense.

The bottom of the bag 15 is then closed by flap parts remaining and bonding or welding of these parts to each other.

As shown in Figure 2, the ends 2a, 3a are are placed side by side substantially in the plane of the wall 16 and are substantially perpendicular to the plane in which the ends 2b, 3b, at line 11.

The two bands 2, 3 are thus each twisted over a quarter of turn, which tends to separate them from each other. They are a handful 20 gripping the bag, and the space between them due to their twisting facilitates the introduction by a consumer of one or more fingers or thumb to grab the bag 15.

FIG. 3 represents a bag comprising two pairs of bands 2, 3 constituting two handles 20. The bands 2, 3 of a pair of strips are fixed to film 1 in the aforementioned manner, close to the location of one of the welds 10 while the strips 2, 3 of the other pair of bands are fixed to film 1, also in the aforementioned manner, at proximity to the other weld 10.

In addition, the bag 15 includes a precut line 25 arranged transversely on the wall 18 and extending over a part walls 17, and passing close to the zone for fixing the strips 2, 3 of a handle 20.

The two handles 20 can be used individually or simultaneously to carry the bag 15, and the line 25 delimits a flap 26 opening / closing of the bag 15. The handle 20 integral with this flap 26 can be used as a pull tab to easily tear the wall of bag 15 at line 25, so that access to articles is easy and quick to make.

The strips of this handle 20 may include an adhesive repositionable allowing the flap 26 to be kept in the closed position and thus protecting the articles remaining in the bag 15.

FIG. 4 represents a bag 15 also comprising two tape pairs 2, 3, each of which is attached to film 1 in the manner cited above.

In this case, the bands 2, 3 are joined together at their free ends, by a weld zone 11, this zone 11 comprising a transverse precut line 30.

This bag 15 includes a precut line 25 similar to the above.

The two pairs of bands 2, 3 extend, before the first opening of the bag 15, along the wall 18 and thus constitute a handle allowing gripping of the bag 15 in various ways.

When the bag 15 is opened, the two pairs of bands 2, 3 are separated by tearing at line 30, so that the pair of strips 2, 3 secured to the flap 26 can be used as a pull tab to open the bag 15, and / or as a pull tab closing of the bag 15, as indicated above.

The invention thus provides a packaging bag for placed articles. side by side, especially for diapers, to remedy to the disadvantages of bags homologous to the prior art. In Indeed, this bag includes an improved handle system from the point of view in particular the possibilities of use of this system by consumers, bag making or bag capacity to receive information and / or other decorations.

It goes without saying that the invention is not limited to the forms of achievements described above as examples but that it embraces on the contrary, all the variant embodiments. So, bands 2, 3 may be formed by transverse folding of a primary strip, and thus be connected to each other by the continuity of the material of said strip primary at the transverse fold; in the case of the bag shown in the figure 4, the two pairs of strips 2, 3 can be formed by assembly of two longitudinal primary bands, having a corresponding length to that of the bag and intended to be connected by their ends, to said film, one of these longitudinal primary bands constituting two of the bands 2 pairs of bands and one of these longitudinal primary bands constituting the other two bands 3 of these pairs of bands, these two longitudinal primary bands being joined to each other apart of their ends assembled to the film; the precut 30 can be arranged at the level of the portion by which these two primary bands longitudinal are assembled to each other; this assembly and this pre-cutting can be done before the bands are placed in said inner ply, or, alternatively, these two primary bands longitudinal may have an arcuate shape in the longitudinal direction so that their portions to be assembled and precut are lie outside said longitudinal fold when their ends are engaged in this same fold; these welds and precuts can then be carried out simultaneously with the fixing of said ends to said film.

Claims (12)

Packaging bag (15) for articles placed side by side, in particular for diapers, of the type formed from a continuous film (1) of synthetic material, this film (1) being, at the time of constitution of the bag (15), folded so as to have two parallel walls (5) and an inner fold (6, 7) along one of its longitudinal edges, so that it has, seen at the end, a section in the shape of an "M", and two transverse welds (10) being arranged on the film (1) to assemble said walls (5) and said fold (6, 7), then the film (1) being cut beyond these welds (10) to individualize the bag (15), the latter comprising a first strip (2, 3) of synthetic material, placed inside said inner ply (6, 7) and welded to the film (1) , intended to constitute a carrying handle for the bag (15);
bag (15) characterized in that it comprises at least a second strip (3, 2) of synthetic material, placed, at the time of the constitution of the bag (15), parallel to said first strip (2, 3) and against the latter, these two bands (2, 3) extending over only part of the length of the bag; one of these bands (2, 3) is connected by one of its longitudinal ends (2a, 3a) to one of the walls (6, 7) forming said interior fold while the other band (3, 2) is connected by its adjacent longitudinal end (3a, 2a) to the other of the walls (7, 6) forming said interior fold, and the two strips (2, 3) are connected to each other by their other longitudinal ends (2b, 3b). Bag (15) according to claim 1, characterized in that it comprises a precut line (25) passing near the ends (2a, 3a) bands (2, 3) which are fixed on it, this line (25) defining a flap (26) for opening / closing the bag (15) and said ends (2a, 3a) being integral with this flap (26). Bag (15) according to claim 2, characterized in that at at least one of the bands (2, 3) integral with said flap (26) comprises a "repositionable" adhesive, that is to say suitable for allowing several bonding / take-off of this strip (2, 3) relative to the bag (15). Bag (15) according to one of claims 1 to 3, characterized in that said first and second strips are formed by folding transverse of a primary strip, and are thus connected to each other by the continuity of the material of said primary strip at the transverse fold. Bag (15) according to one of claims 1 to 3, characterized in what it includes, in addition to said first and second bands, two other bands (2, 3) attached to it on its side opposite to that on which are located said first and second bands (2, 3), these other two bands (2, 3) being connected to the bag (15) by one of their longitudinal ends (2a, 3a) and being connected to each other by their other longitudinal ends (2b, 3b), as mentioned above. Bag (15) according to claim 5, characterized in that it comprises a precut line (25) passing near the ends (2a, 3a) bands (2, 3) of one of its pairs of bands (2, 3), this line (25) delimiting a flap (26) for opening / closing the bag (15) and said bags ends (2a, 3a) being integral with this flap (26). Bag (15) according to claim 6, characterized in that at at least one of the bands (2, 3) integral with said flap (26) comprises a "repositionable" adhesive, that is to say suitable for allowing several bonding / take-off of this strip (2, 3) relative to the bag (15). Bag (15) according to one of claims 5 to 7, characterized in that the bands (2, 3) of the two pairs of bands are joined together to others at their free ends by a junction zone (11), and in this zone (11) comprises a frangible portion. Bag (15) according to claim 8, characterized in that said zone (11) by which the strips (2, 3) are joined comprises a precut line (30). Bag (15) according to one of claims 5 to 9, characterized in that the two pairs of strips (2, 3) are formed by assembly of two longitudinal primary bands, having a corresponding length to that of the bag (15) and intended to be connected by their ends, to said film, one of these longitudinal primary bands constituting two of the bands (2) pairs of bands and one of these primary bands longitudinal constituting the other two bands (3) of these pairs of tapes; these two longitudinal primary bands being assembled one to the other outside their ends assembled to the film. Method for manufacturing a bag (15) according to one of claims 1 to 10, characterized in that it comprises the following operations: a) use a continuous film (1) of synthetic material, folded so as to have two parallel walls (5) and an inner fold (6, 7) along one of its longitudinal edges, so that this film (1) has, seen at the end, a cross section in the shape of an "M"; b) placing a first strip (2, 3) and a second strip (3, 2) of synthetic material in said inner ply, these strips (2, 3) being positioned parallel to each other and overlapping the one of the other; c) fix one of the longitudinal ends of one of these strips (2, 3) to the wall (6, 7) of the inner fold adjacent to this strip (2, 3) and one of the longitudinal ends of the 'other of these bands (3, 2) against the wall (7, 6) of the inner fold adjacent to this other band; d) providing two transverse welds (10) on the film (1) to assemble said walls (5) and said fold (6, 7), and e) cutting the film (1) beyond these welds (10) to individualize the bag (15). Method according to claim 11, characterized in that it also comprises the following operations: for operation (b), use strips each formed from two superimposed materials having different weldability temperatures, each strip being arranged in said inner ply so that the material having the lowest weldability temperature is turned towards the adjacent wall of this inner ply, and that, therefore, the faces of the strips comprising the material having the highest weldability temperature are turned towards one another; for operation (c), secure said longitudinal ends of the strips to said adjacent walls of the inner fold by pinching the film-strip assembly from the outside by means of a pinching member capable of being heated, and by heating this pinching member beyond said lowest weldability temperature but below said highest weldability temperature.

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