DE202022103245U1 - paper tube bag - Google Patents

Abstract

Paper tube bag (1) comprising a flexible base paper sheet (2) with two longitudinal edges (6) extending at least in sections with a directional component parallel to a first direction (3) and a first transverse edge (7a) and a second transverse edge (7b) which extend at least extend in sections with a directional proportion parallel to a second direction (4) and which delimit the base paper sheet (2) seen in the first direction (3),
wherein the base paper sheet (2), seen in the first direction (3), is bent over to form a tube and delimits a receiving volume (9) at least in sections, the longitudinal edge regions (8) of the base paper sheet (2) having longitudinal edges (6) overlap and are sealed to one another, to close the tubular shape as seen in a circumferential direction (12), the holding volume (9) extending in the first direction (3), the second direction (4) and a third direction (5) and the first direction (3) , the second direction (4) and the third direction (5) are mutually normal to each other,
wherein a first transverse edge region (10a) having the first transverse edge (7a) is sealed and a second transverse edge region (10b) having the second transverse edge (7b) is sealed in order to close the paper tube bag (1) in the first direction (3),
wherein the sheet of base paper (2) is glued to a sheet of reinforcing paper (13) in a planar reinforcing section (11) and wherein at least one hole (14) forming a through-opening from the receiving volume (9) to the outside is provided in the reinforcing section (11).

Description

FIELD OF THE INVENTION

The present invention relates to a paper tube bag and a paper tube bag blank for producing the paper tube bag according to the invention.

STATE OF THE ART

Tubular bags are widely used in particular for packaging food. The material used for the tubular bags is primarily plastic, which is typically made available as tape or rolls.

Typically, in the production of the tubular bag filled with packaged goods, the strip is arranged with a (unrolled) section over the packaged goods and bent over to form a tube around the packaged goods and then sealed under the packaged goods. In front of and behind the packaged goods, the tube is pressed together and also sealed and, if necessary, cut off, resulting in the filled tubular bag.

Plastic has a number of advantages as a material for tubular bags. On the one hand, the plastic only has to be sufficiently heated for sealing, i.e. no additional adhesive is required. On the other hand, the plastic can be colored or printed in any way, in particular transparent areas of the tubular bag being able to be produced without any problems, so that the packaged goods are visible from the outside. Depending on the application, holes can also be provided in the tubular bag without any problems, for example for packaging fruit.

However, the major disadvantage of the plastic material is the environmental problem, particularly with regard to disposal and consumer perception.

Although alternatives known from the prior art, which are based on cellulose-based plastics, can alleviate problems in disposal, they are extremely problematic in production due to the toxic substances that are produced. In addition, the consumer hardly or not at all recognizes that an alternative material was actually used here.

OBJECT OF THE INVENTION

It is therefore the object of the present invention to provide an alternative tubular bag which overcomes the disadvantages mentioned. In particular, the alternative tubular bag should meet current and future environmental requirements and be recognizable as such for consumers. In addition, it should preferably be possible to continue using existing production systems that work with plastic material, if possible without modifications or only with minor modifications.

PRESENTATION OF THE INVENTION

The core of the present invention for solving the above problem is to use paper as the material for an alternative tubular bag, i.e. to provide a paper tubular bag. As a result, the above environmental requirements can be easily met. The material paper is immediately recognizable both visually and haptically for the user or consumer, which means that the paper tubular bag is also immediately and easily recognizable as environmentally friendly for the user. By providing at least one hole in the paper tubular bag, visibility of the packaged goods can be ensured, with holes being absolutely necessary in any case, particularly when packaging foodstuffs such as fruit. However, it turns out that the paper, which has to be sufficiently flexible in order to be brought into the necessary tube shape, as is usual with existing production systems, tears very easily in the area of the holes. Another essential point of the present invention is therefore the avoidance of this tearing.

For this purpose, a tubular paper bag is provided according to the invention, comprising a flexible base paper sheet with two longitudinal edges extending at least in sections with a directional component parallel to a first direction, and a first transverse edge and a second transverse edge, which extend at least in sections with a directional component parallel to a second direction and which delimit the base paper sheet as seen in the first direction, the base paper sheet being bent over to form a tubular shape as seen in the first direction and delimiting a receiving volume at least in sections, the longitudinal edge regions of the base paper sheet having longitudinal edges overlap and are sealed to one another in order to close the tubular shape as seen in a circumferential direction , wherein the receiving volume extends in the first direction, the second direction and a third direction and the first direction, the second direction and the third direction are mutual stand perpendicular to each other, wherein a first transverse edge area having the first transverse edge is sealed and a second transverse edge area having the second transverse edge is sealed in order to close the paper tube bag in the first direction, wherein the base paper sheet is bonded to a reinforcing paper sheet in a planar reinforcement section, and wherein at least one hole forming a through-opening from the receiving volume to the outside is provided in the reinforcement section.

The bendable base paper sheet allows for easy bending into tubular shape, which is an important requirement for manufacturing the paper tubular bag with existing machines designed for plastics. For the sake of completeness, it should be noted that cardboard does not have sufficient flexibility, whereby cardboard differs from paper in particular in its higher basis weight of more than 150 g/m ² , see e.g. https://de.wikipedia.org/wiki/Karton ( Material).

When the paper tube bag is produced, the longitudinal edges typically run essentially parallel to the first direction over a mostly large section, with in the area of the sealed transverse areas, i.e. in the area of the ends of the paper tube bag, there usually being at least one curvature, with the course of the longitudinal edges in the area of the sealed Transverse areas has at least one directional component parallel to the third direction.

Typically, the first transverse edge is located in front of the second transverse edge as viewed in the first direction.

The tube shape is to be understood in the broadest sense, in particular such that the tube shape is also given in the sealed transverse areas, where the shape or tube shape corresponds to that of a compressed tube without an internal cross section. In the area of the receiving volume, on the other hand, there is in any case a clear cross-section of the tube shape.

The receiving volume is used to receive packaged goods, with the packaged goods being able to be arranged in the receiving volume before or during the production process of the paper tubular bag.

The sealing takes place by gluing using a sealing adhesive known per se, which can be a sealing wax, for example, with a glued seam, typically in the form of a glued strip, being produced. Here, the sealing adhesive can be heated and/or the areas to be sealed can be put under pressure.

In particular when sealing the first and second transverse edge areas, these or the ends of the paper tube bag are typically pressed together during sealing, so that preferably essentially every part of the respective transverse edge area is overlapped and glued/sealed to another part of the respective transverse edge area.

If both transverse edge areas are sealed, the paper tube bag - and thus the storage volume - is closed viewed parallel to the first direction. Closing in the second and third direction or in the circumferential direction results from the production of the tube shape and the sealing of the longitudinal edge areas.

To prevent the base paper sheet from tearing in the area of the at least one hole, the base paper sheet is glued to the reinforcement paper sheet - but only in the reinforcement section, so as not to impede or impair problem-free bending to form a tubular shape.

It should be noted that the mechanical reinforcement of the base paper sheet is contributed not only by the reinforcing paper sheet, but also by its gluing.

As with sealing, bonding is also achieved using means known per se. For example, the sealing adhesive already mentioned, in particular in the form of a sealing wax, can be provided for this purpose. A further example for gluing the base paper sheet to the reinforcing paper sheet would be a lamination, ie a two-dimensional gluing, by means of a laminating adhesive known per se.

The at least one hole forms a through-opening of the paper tube bag from the outside into the receiving volume and vice versa. I.e. the respective hole is present both in the base paper sheet and in the backing paper sheet or forms a through opening that extends through the base paper sheet and through the backing paper sheet and any layers present in between, in particular an adhesive layer that may be present.

In order to be able to optimally ensure bending to form the tubular shape, it is provided in a preferred embodiment of the paper tubular bag according to the invention that the reinforcement section extends only over a limited area of the base paper sheet, viewed in the circumferential direction, preferably only in a half-space that is defined by a plane , which contains a longitudinal axis of the paper tube bag running parallel to the first direction, and that the reinforcement section extends at least in sections, preferably completely, over the base paper sheet as seen in the first direction extends. Correspondingly, the backing paper sheet also extends in the circumferential direction only over a limited area of the base paper sheet.

In practice, the limitation of the, in particular circumferential, extent to the mentioned half-space means that the reinforcing section is typically only arranged on an upper side of the paper tube bag, with the upper side being arranged opposite the overlapping longitudinal edge regions.

Since the reinforcement section or the reinforcement paper sheet extends completely over the base paper sheet as seen in the first direction, i.e. from the first transverse edge to the second transverse edge, a paper tubular bag blank designed as roll goods can be provided with a corresponding continuous reinforcement section or reinforcement paper sheet, which in turn favors the production of the paper tubular bag blank.

It is conceivable that the reinforcing paper sheet is arranged on an outside of the paper tube bag and is visible from the outside. In order to be able to make the paper tube bag particularly attractive in terms of appearance, it is provided in a preferred embodiment of the paper tube bag according to the invention that the reinforcement paper sheet is arranged in the paper tube bag. I.e. the sheet of reinforcing paper is arranged on an inside of the tubular paper bag, which faces into the receiving volume, and is not visible from the outside, so that the external appearance is not influenced or even disturbed by the sheet of reinforcing paper. Correspondingly, a free surface of the reinforcing paper sheet also faces into the receiving volume.

Basically, cases are conceivable in which the same material is used for the base paper sheet and the backing paper sheet. In particular, it is conceivable that the basis weight of the reinforcing paper sheet is the same as or even slightly lower than the basis weight of the base paper sheet.

However, in order to achieve a particularly high mechanical reinforcement and still achieve sufficient flexibility, a paper with a higher basis weight than the base paper sheet can be selected as the reinforcing paper sheet, since no strong bends are necessary in the area of the reinforcement section, but the basis weight of the reinforcing paper sheet in the With regard to a high tensile strength can be selected. On the other hand, the basis weight of the base paper sheet can be selected for high flexibility. For example, a thin printing paper can be selected as the base paper sheet and a printing paper as the reinforcing paper sheet. Accordingly, in a preferred embodiment of the tubular paper bag according to the invention, the basis weight of the base paper sheet is in the range from 25 g/m ² to 60 g/m ² , preferably from 30 g/m ² to 50 g/m ² , and/or that the basis weight of the reinforcing paper sheet is in the range from 20 g/m ² to 120 g/m ² , preferably from 80 g/m ² to 120 g/m ² , particularly preferably from 80 g/m ² to 90 g/m ² . The selection of the basis weights, in particular the basis weight of the reinforcing paper sheet, is typically dependent on the respective packaging system.

As already mentioned, the reinforcing paper sheet can be connected to the base paper sheet by lamination, ie by gluing over the entire surface. With regard to environmental protection, it can be advantageous to apply a sealing adhesive for said bonding only partially and not - as is usual with lamination - over the entire surface, in particular over the entire reinforcement section. Accordingly, in a preferred embodiment of the paper tube bag according to the invention, a sealing adhesive is only partially arranged in the reinforcement section, in particular in the respective area around the at least one hole, to bond the reinforcement paper sheet to the base paper sheet. As already explained above, suitable sealing adhesives are known per se. By arranging the sealing adhesive around the respective hole, the mechanical reinforcement caused by the sealing adhesive against tearing in the area of the respective hole is largely ensured, since the reinforcement caused by the adhesive used is particularly noticeable in these areas. At the same time, material in the form of sealing adhesive can be saved, which also has a cost-effective effect.

Of course, more than one hole can be provided per tubular paper bag. A wide variety of shapes and sizes are conceivable, so that an optimal adjustment to the respective packaged goods is possible without any problems. In a preferred embodiment of the paper tube bag according to the invention, provision is accordingly made for a multiplicity of holes to be provided, with the holes preferably having different shapes and/or sizes. The latter is to be understood in such a way that at least two holes have different shapes and/or different sizes, but at the same time holes of the same shape or the same size can very well exist.

In a preferred embodiment of the tubular paper bag according to the invention, a sealing adhesive is provided in at least one of the longitudinal edge areas to seal the longitudinal edge areas, with the sealing adhesive being only partially arranged in the respective longitudinal edge area.

In principle, it is conceivable to provide sealing adhesive in only one longitudinal edge area for sealing the longitudinal edge areas, which can then in particular also be arranged on the same side of the base paper sheet as the sealing adhesive in the transverse edge areas, which further simplifies production, especially with regard to the production of the paper tube bag blank as the starting product for the paper tubular bag.

Since the sealing adhesive is not applied over the entire area in the respective longitudinal edge area, but only partially, for example in the form of a straight or wavy line, sealing adhesive can be further saved. This is not only favorable in terms of costs, but also in terms of environmental protection and the requirements for waste paper recycling.

Similarly, in a preferred embodiment of the paper tube bag according to the invention, a sealing adhesive is provided for sealing the first transverse edge area and the second transverse edge area, which is only partially arranged in the respective transverse edge area. Since the sealing adhesive is not applied over the entire surface in the respective transverse edge area, but only partially, for example in the form of a straight or wavy line, sealing adhesive can be further saved, which in turn is not only favorable in terms of costs, but also in terms of environmental protection and the requirements for waste paper recycling.

In order in particular to meet requirements with regard to the recyclability of the tubular paper bag, it is provided in a preferred embodiment of the tubular paper bag according to the invention that sealing adhesive is provided for gluing the base paper sheet to the reinforcing paper sheet and for sealing the longitudinal edge areas, the first transverse edge area and the second transverse edge area. the proportion by weight of the sealing adhesive on the tubular paper bag being a maximum of 5%, preferably a maximum of 3.5%. The low weight ensures that the paper or paper tube bag can be recycled without any problems. In particular, the low proportion by weight can be ensured by partial application of the sealing adhesive.

1. A) Umbiegen des Basispapierblatts zu einer Schlauchform, wobei ein Aufnahmevolumen zumindest abschnittsweise begrenzt wird und wobei die Längskantenbereiche überlappen;
2. B) Versiegeln der Längskantenbereiche;
3. C) sequentielles oder gleichzeitiges Versiegeln der zwei Querbereiche, zwischen denen der Stückbereich angeordnet ist.

Analogously to what has been said above, the invention provides a method for producing a paper tube bag according to the invention, using a paper tube bag blank comprising a flexible base paper sheet with two longitudinal edges, sealing adhesive being applied to at least one of the two longitudinal edge areas having the longitudinal edges, wherein in transverse areas that are transverse to run along the longitudinal edges and connect them to one another, sealing adhesive is applied, with a planar reinforcement section being provided between the longitudinal edge areas, in which the base paper sheet is bonded to a reinforcement paper sheet, and with at least one hole passing through the paper tubular bag blank being provided in each piece area of the reinforcement section , the respective piece area being measured between the longitudinal edge areas and between two transverse areas which follow one another and from one another with a along the longitudinal edges a distance apart, the method comprising the following steps:

1. A) bending the base paper sheet into a tubular shape, with a holding volume being limited at least in sections and with the longitudinal edge regions overlapping;
2. B) sealing the longitudinal edge portions;
3. C) Sequential or simultaneous sealing of the two transverse areas between which the piece area is located.

In principle, what was said above about the paper tube bag applies.

The paper tube bag is manufactured from the paper tube bag blank, whereby existing (designed for plastic) manufacturing machines can be used. The paper tubular bag blank can be made available as rolled goods, which is favorable in terms of costs and the manufacturing process.

The longitudinal edges are substantially parallel to and opposite each other.

Preferably, the reinforcement area or sheet of reinforcement paper is spaced from the longitudinal edge areas.

The same sealing adhesive (e.g. a sealing wax) is preferably provided for the different longitudinal edge and transverse areas, particularly preferably also for gluing the reinforcing paper sheet to the base paper sheet.

In the transverse areas, the sealing adhesive is typically applied to both the base paper sheet and the backing paper sheet, for example as a continuous, in particular straight or wavy or wavy line.

The sealing of the longitudinal edge areas according to step B) is clearly carried out by means of the sealing adhesive which is arranged in at least one of the longitudinal edge areas.

The sealing of the transverse areas according to step C) is clearly carried out by means of the sealing adhesive that is arranged in the transverse areas.

In step C), the transverse regions can already have become transverse edge regions, in particular if the paper tubular bag blank has been trimmed accordingly. However, it is also conceivable that several paper tubular bags arranged one behind the other are produced simultaneously and only after the sealing of the transverse areas is the paper tubular bag produced at the same time separated by cutting off or trimming in the area of the transverse regions.

When sealing the two transverse areas sequentially, the order can basically be arbitrary, i.e. first one then the other transverse area or vice versa.

1. i) falls keine erste Querkante vorhanden ist, Erzeugen einer ersten Querkante durch Abschneiden des Basispapierblatts in einem der Querbereiche, wobei die erste Querkante in einem mit dem Querbereich zumindest abschnittsweise überlappenden ersten Querkantenbereich angeordnet ist;
2. ii) Erzeugen einer zweiten Querkante durch Abschneiden des Basispapierblatts in jenem der Querbereiche, welcher auf den ersten Querkantenbereich folgt, wobei die zweite Querkante in einem mit jenem Querbereich zumindest abschnittsweise überlappenden zweiten Querkantenbereich angeordnet ist; und dass das Verfahren in Schritt C) die folgenden Schritte umfasst:
3. iii) Versiegeln des zweiten Querkantenbereichs;
4. iv) Versiegeln des ersten Querkantenbereichs, wobei die Reihenfolge der Schritte iii) und iv) vertauschbar ist und/oder die Schritte iii) und iv) auch gleichzeitig erfolgen können. D.h. hier wird der Papierschlauchbeutel vom restlichen Papierschlauchbeutel-Rohling oder ggf. zumindest einem anderen Papierschlauchbeutel, der gleichzeitig erzeugt wird, durch Abschneiden getrennt, bevor ein vollständiges Verschließen des Papierschlauchbeutels an dessen Enden erfolgt.

In a preferred embodiment of the method according to the invention, it is provided that the following steps are carried out before step A) or after step B):

1. i) if there is no first transverse edge, producing a first transverse edge by cutting off the base paper sheet in one of the transverse regions, the first transverse edge being arranged in a first transverse edge region which at least partially overlaps with the transverse region;
2. ii) creating a second transverse edge by cutting off the base paper sheet in that one of the transverse regions which follows the first transverse edge region, the second transverse edge being arranged in a second transverse edge region which at least partially overlaps with that transverse region; and that the method in step C) comprises the following steps:
3. iii) sealing the second transverse edge portion;
4. iv) sealing the first transverse edge area, wherein the order of steps iii) and iv) can be interchanged and/or steps iii) and iv) can also take place simultaneously. Ie here the paper tube bag is separated from the rest of the paper tube bag blank or possibly at least one other paper tube bag that is produced at the same time by cutting before the ends of the paper tube bag are completely closed.

The sealing of the transverse edge areas according to steps iii) and iv) is clearly carried out by means of the sealing adhesive arranged in the transverse edge areas created from the transverse areas.

Particularly in the sequential production of tubular paper bags, the transverse regions become the first transverse edge region (cf. step i)) and the second transverse edge region (cf. step ii)) when the first transverse edge and the second transverse edge are produced by cutting.
The first transverse edge area is different from the second transverse edge area of the one currently to be produced
Paper tube bag spaced, which is why the transverse areas underlying these transverse edge areas are spaced from each other.

Typically, if the paper tubular bag blank is made available as roll goods and is continuously unrolled or unwound from a roll during the process, not only the second transverse edge (and thus the second Transverse edge area) of the paper tube bag currently being produced is generated, but at the same time also the first transverse edge (and thus the first transverse edge area) of the next paper tube bag to be produced. Before this cut, the successive transverse areas of the paper tube bag blank, more precisely the paper tube bag blank section, for the paper tube bag currently to be produced and the next paper tube bag to be produced are not necessarily spaced apart from one another and could also be understood as a common - large or enlarged - transverse area which then produces the different transverse edge areas, namely the second transverse edge area of the paper tube bag currently to be produced and the first transverse edge area of the next paper tube bag to be produced.

To fill the respective paper tubular bag with packaged goods, the latter can already be arranged in the storage volume before the actual production of the paper tubular bag begins, i.e. even before the paper tubular bag blank is bent into a tubular shape (which only limits the storage volume at least in sections), or during the Manufacturing process, as long as the paper tube bag is not yet closed at both ends (in particular by sealing both the first and the second transverse edge area). It is the same with one In a preferred embodiment of the method according to the invention, packaged goods are arranged in the receiving volume at the latest before step C) is completed, preferably already before or during step A). This means that there is great flexibility with regard to the exact point in time at which the packaged goods are brought in, which in turn is beneficial with regard to different applications.

As already mentioned, the paper tubular bag blank can be designed as rolled goods, which is favorable with regard to the, in particular sequential, production of a large number of paper tubular bags. Accordingly, in a preferred embodiment of the method according to the invention, it is provided that the paper tubular bag blank is present as rolled goods on a roll, with the base paper sheet being unrolled from the roll at least in sections before step A). A quasi-continuous transition between being pulled off the roll and being bent over to form a tubular shape is also conceivable, i.e. the section of the paper tubular bag blank or base paper sheet pulled off the roll can theoretically be as small as desired before the bending begins.

Corresponding to what has been said above, a paper tubular bag blank is also provided according to the invention for a method according to the invention for producing a paper tubular bag according to the invention, comprising a flexible base paper sheet with two longitudinal edges, with sealing adhesive being applied at least in one of the two longitudinal edge regions having the longitudinal edges, with transverse regions that are transverse run to the longitudinal edges and connect them to one another, sealing adhesive is applied, with a planar reinforcement section being provided between the longitudinal edge areas, in which the base paper sheet is glued to a reinforcement paper sheet, and with at least one through-hole through the paper tubular bag blank being provided in each piece area of the reinforcement section is, the respective piece area between the longitudinal edge areas and between two transverse areas which follow one another and are separated from each other with a along the longitudinal k ants are spaced apart measured distance, is arranged, wherein the paper tubular bag blank is preferably formed as a rolled goods.

character list

The invention will now be explained in more detail using an exemplary embodiment. The drawings are exemplary and are intended to explain the idea of the invention, but in no way restrict or even conclusively reproduce it.

• 1 eine schematische Aufsicht auf eine Unterseite einer Ausführungsform eines erfindungsgemäßen Papierschlauchbeutel-Rohlings zur Herstellung einer Ausführungsform eines erfindungsgemäßen Papierschlauchbeutels
• 2 eine schematische Aufsicht auf eine Oberseite des Papierschlauchbeutel-Rohlings aus 1
• 3 eine schematische Seitenansicht der Ausführungsform des erfindungsgemäßen Papierschlauchbeutels

It shows:

• 1 a schematic plan view of an underside of an embodiment of a paper tube bag blank according to the invention for the production of an embodiment of a paper tube bag according to the invention
• 2 a schematic plan view of an upper side of the paper tubular bag blank 1
• 3 a schematic side view of the embodiment of the paper tube bag according to the invention

WAYS TO CARRY OUT THE INVENTION

1 shows a schematic plan view of an underside 20 of an embodiment of a paper tube bag blank 15 according to the invention for the production of an embodiment of a paper tube bag 1 according to the invention, the underside 20 being provided for at least partially forming an inside 22 of the paper tube bag, cf. 3 .

The tubular paper bag blank 15 comprises a flexible base paper sheet 2 which, in the exemplary embodiment shown, has a basis weight in the range from 30 g/m ² to 50 g/m ² .

The base paper sheet 2 has two longitudinal edges 6, wherein in the exemplary embodiment shown in one of the two longitudinal edge regions 8 (in 1 and 2 indicated by the dotted line) sealing adhesive 17 is applied. The sealing adhesive 17 is in the in 1 The longitudinal edge region 8 that can be seen on the right-hand side is not applied over the entire area, but only partially, namely in the form of a straight line, with the sealing adhesive 17 being arranged on the underside 20 .

Furthermore, the base paper sheet has 2 transverse areas 19, 19' (in 1 and 2 also indicated by the dotted line) which run transversely to the longitudinal edges 6 and connect them to one another. In the transverse areas 19, 19', too, sealing adhesive 17 is not applied over the entire surface, but only partially in the form of a straight line, with the sealing adhesive 17 being arranged on the underside 20.

In the exemplary embodiment shown, the sealing adhesive 17 is a sealing wax that is known per se.

A flat reinforcement section 11 is provided between the longitudinal edge areas 8, in which the base paper sheet 2 is glued to a reinforcing paper sheet 13, with the illustrated embodiment gluing being carried out over a large area by lamination, which is known per se.

In the exemplary embodiment shown, the reinforcing paper sheet 13 has a basis weight in the range from 80 g/m ² to 90 g/m ² .

The reinforcement section 11 or the reinforcement paper sheet 13 extends parallel to the longitudinal edges 6 over the entire paper tubular bag blank 15. Piece areas 16 or one piece area 16 of the reinforcement section 11 are/is delimited by the transverse areas 19, 19' or the piece area lies 16 between the transverse portions 19, 19' which follow one another and are spaced from one another by a distance measured along the longitudinal edges 6. In the illustrated embodiment, a plurality of circular holes 14 are provided in the piece area 16 , the holes 14 completely penetrating the paper tubular bag blank 15 and forming corresponding through-openings in the paper tubular bag blank 15 . Due to the mechanical reinforcement provided by the reinforcing paper sheet 13 bonded to the base paper sheet 2, there is no tearing in the area of the holes 14 when the paper tubular bag blank 15 or the base paper sheet 2 is bent into a tubular shape during the production of the paper tubular bag 1.

In the exemplary embodiment shown, the paper tubular bag blank 15 is configured as rolled goods and is correspondingly unrolled from a roll (not shown) during the production of the paper tubular bag 1, which will be explained in more detail below, and for the respective paper tubular bag 1 to be produced transversely to the longitudinal edges - or cut off. In this way, a large number of tubular paper bags 1 can be produced sequentially without any problems.

In 1 and 2 , which shows an upper side 21 of the paper tubular bag blank 15 opposite the underside 20, the paper tubular bag blank 15 or the base paper sheet 2 for the production of a paper tubular bag 1 is unrolled completely flat and a subsequent section of the base paper sheet 2 that is not yet completely unrolled , indicated by dashed lines. The upper side 21 is provided for the at least partial formation of an outer side 23 of the paper tube bag 1, cf. 3 . Correspondingly, the reinforcing paper sheet 13 is not visible to a user on the outside 23, see also FIG 2 .

The base paper sheet 2 extends in 1 and 2 with the longitudinal edges 6 parallel to a first direction 3 and with the transverse portions 19, 19' parallel to a second direction 4. The first direction 3, the second direction 4 and a third direction 5 are mutually normal to each other.

Seen in the first direction 3, the base paper sheet 2 is delimited by a first transverse edge 7a, the first transverse edge 7a being arranged in a first transverse edge region 10a, which coincides with the transverse region 19 in the exemplary embodiment shown.

The above-mentioned cutting or cutting is carried out parallel to the second direction 4, whereby a second transverse edge 7b is formed, which also delimits the base paper sheet 2 seen in the first direction 3 and is arranged in a second transverse edge area 10b, which in the illustrated embodiment is connected to the Transverse area 19' coincides.

1. A) Umbiegen des Basispapierblatts 2 zu einer Schlauchform, wobei ein Aufnahmevolumen 9 zumindest abschnittsweise begrenzt wird und wobei die Längskantenbereiche 8 überlappen;
2. B) Versiegeln der Längskantenbereiche 8, typischerweise durch Erhitzen des im Längskantenbereich 8 angeordneten Siegelklebstoffs 17 und/oder durch Aufbringen von Druck auf die überlappenden Längskantenbereiche 8;
3. C) sequentielles oder gleichzeitiges Versiegeln der zwei Querbereiche 19, 19', zwischen denen der jeweilige Stückbereich 16 angeordnet ist.

To produce the paper tube bag 1 using the paper tube bag blank 15, the following steps are carried out according to the exemplary embodiment shown:

1. A) bending over the base paper sheet 2 into a tubular shape, with a holding volume 9 being limited at least in sections and with the longitudinal edge regions 8 overlapping;
2. B) sealing the longitudinal edge areas 8, typically by heating the sealing adhesive 17 arranged in the longitudinal edge area 8 and/or by applying pressure to the overlapping longitudinal edge areas 8;
3. C) Sequentially or simultaneously sealing the two transverse portions 19, 19' between which the respective piece portion 16 is located.

1. i) falls keine erste Querkante 7a vorhanden ist, Erzeugen der ersten Querkante 7a durch Abschneiden des Basispapierblatts 2 im Querbereich 19, wobei die erste Querkante 7a im mit dem Querbereich 19 zumindest abschnittsweise überlappenden ersten Querkantenbereich 10a angeordnet ist;
2. ii) Erzeugen der zweiten Querkante 7b durch Abschneiden des Basispapierblatts 2 im Querbereich 19', wobei die zweite Querkante 7b im mit dem Querbereich 19' zumindest abschnittsweise überlappenden zweiten Querkantenbereich 10b angeordnet ist. Weiters umfasst Schritt C) gemäß dem dargestellten Ausführungsbeispiel folgende Schritte:
3. iii) Versiegeln des zweiten Querkantenbereichs 10b;
4. iv) Versiegeln des ersten Querkantenbereichs 10a, wobei die Reihenfolge der Schritte iii) und iv) vertauschbar ist und/oder die Schritte iii) und iv) auch gleichzeitig erfolgen können.

According to the exemplary embodiment shown, the following steps are carried out before step A) or after step B):

1. i) if there is no first transverse edge 7a, producing the first transverse edge 7a by cutting off the base paper sheet 2 in the transverse region 19, the first transverse edge 7a being arranged in the first transverse edge region 10a which at least partially overlaps with the transverse region 19;
2. ii) producing the second transverse edge 7b by cutting off the base paper sheet 2 in the transverse region 19', the second transverse edge 7b being arranged in the second transverse edge region 10b which at least partially overlaps with the transverse region 19'. Furthermore, step C) includes the following steps according to the exemplary embodiment shown:
3. iii) sealing the second transverse edge portion 10b;
4. iv) sealing of the first transverse edge region 10a, the sequence of steps iii) and iv) being interchangeable and/or steps iii) and iv) also being able to take place simultaneously.

In the illustrated embodiment, packaged goods 18, which 3 is indicated by dashed lines and which can be, for example, vegetables in a cardboard tray, already arranged in the receiving volume 9 before or during step A).

According to the exemplary embodiment shown, the tubular paper bag blank 15 or the base paper sheet 2 is unrolled from the roll (not shown) at least in sections before step A).

The resulting tubular paper bag 1 comprises the flexible base paper sheet 2 with the longitudinal edges 6 extending at least in sections with a directional component parallel to the first direction 3 and the first transverse edge 7a and the second transverse edge 7b, which extend at least in sections with a directional component parallel to the second direction 4, see. 3 .

The base paper sheet 2 is bent over to form a tubular shape as seen in the first direction 3 and delimits the holding volume 9 at least in sections, with the longitudinal edge regions 8 of the base paper sheet 2 having the longitudinal edges 6 overlapping and being sealed to one another in order to close the tubular shape as seen in a circumferential direction 12.

The first transverse edge area 10a having the first transverse edge 7a is sealed and the second transverse edge area 10b having the second transverse edge 7b is sealed in order to close the paper tube bag 1 in the first direction 3 .

The holes 14 in the reinforcement section 11 form through openings from the receiving volume 9 to the outside.

Viewed in the circumferential direction 12, the reinforcement section 11 in the exemplary embodiment of the paper tube bag 1 illustrated extends only over a limited area of the base paper sheet 2, namely in a half-space which is defined by a plane which has a longitudinal axis 24 running parallel to the first direction 3 (in 3 indicated by the dot-dash line) of the paper tube bag 1 contains. In the view of 3 this half-space extends upwards from the longitudinal axis 24 (in the third direction 5).

As already mentioned, in the illustrated embodiment of the tubular paper bag 1, the reinforcing paper sheet 13 is arranged on the inside, i.e. in the tubular paper bag 1, and is therefore not visible from the outside.

Not least because of the above-described partial arrangement of the sealing adhesive 17, its proportion by weight on the paper tubular bag 1 according to the exemplary embodiment shown is a maximum of 3.5%. Accordingly, the paper tube bag 1 can be recycled without any problems.

Reference List

1

paper tube bag

2

base paper sheet

3

First direction

4

second direction

5

third direction

6

long edge

7a

First transverse edge

7b

Second transverse edge

8th

longitudinal edge area

9

recording volume

10a

First transverse edge area

10b

Second transverse edge area

11

reinforcement section

12

Circumferential direction

13

backing paper sheet

14

Hole

15

Paper tubular bag blank

16

piece area

17

sealing adhesive

18

packaged goods

19, 19'

transverse area

20

Underside of the paper tubular bag blank

21

Top of the paper tubular bag blank

22

Inside of the paper tube bag

23

Outside of the paper tube bag

24

Longitudinal axis of the paper tube bag

Claims (10)

Paper tube bag (1) comprising a flexible base paper sheet (2) with two longitudinal edges (6) extending at least in sections with a directional component parallel to a first direction (3) and a first transverse edge (7a) and a second transverse edge (7b) which extend at least extend in sections with a directional proportion parallel to a second direction (4) and which delimit the base paper sheet (2) seen in the first direction (3), wherein the base paper sheet (2) is bent over to form a tubular shape as seen in the first direction (3) and delimits a receiving volume (9) at least in sections, the longitudinal edge regions (8) of the base paper sheet (2) having longitudinal edges (6) overlap and are sealed to one another, to close the tubular shape as seen in a circumferential direction (12), the holding volume (9) extending in the first direction (3), the second direction (4) and a third direction (5) and the first direction (3) , the second direction (4) and the third direction (5) are mutually normal to each other, wherein a first transverse edge region (10a) having the first transverse edge (7a) is sealed and a second transverse edge region (10b) having the second transverse edge (7b) is sealed in order to close the paper tube bag (1) in the first direction (3), wherein the sheet of base paper (2) is glued to a sheet of reinforcing paper (13) in a planar reinforcing section (11) and wherein at least one hole (14) forming a through-opening from the receiving volume (9) to the outside is provided in the reinforcing section (11). Paper tube bag (1) after claim 1 , characterized in that the reinforcing portion (11) extends only over a limited area of the base paper sheet (2) as seen in the circumferential direction (12), preferably only in a half-space defined by a plane having a plane parallel to the first direction ( 3) running longitudinal axis (24) of the paper tube bag (1), and that the reinforcement section (11) seen in the first direction (3) extends at least in sections, preferably completely, over the base paper sheet (2). Paper tubular bag (1) according to one of Claims 1 until 2 , characterized in that the reinforcing paper sheet (13) is arranged in the paper tube bag (1). Paper tubular bag (1) according to one of Claims 1 until 3 , characterized in that the basis weight of the base paper sheet (2) is in the range from 25 g/m ² to 60 g/m ² , preferably from 30 g/m ² to 50 g/m ² , and/or that the basis weight of the reinforcing paper sheet (13) is in the range from 20 g/m ² to 120 g/m ² , preferably from 80 g/m ² to 120 g/m ² , more preferably from 80 g/m ² to 90 g/m ² . Paper tubular bag (1) according to one of Claims 1 until 4 , characterized in that for gluing the reinforcement paper sheet (13) to the base paper sheet (2), a sealing adhesive is only partially arranged in the reinforcement section (11), in particular in the respective area around the at least one hole (14). Paper tubular bag (1) according to one of Claims 1 until 5 , characterized in that a plurality of holes (14) is provided, the holes (14) preferably having different shapes and/or sizes. Paper tubular bag (1) according to one of Claims 1 until 6 , characterized in that a sealing adhesive (17) is provided in at least one of the longitudinal edge areas (8) to seal the longitudinal edge areas (8), the sealing adhesive (17) being only partially arranged in the respective longitudinal edge area (8). Paper tubular bag (1) according to one of Claims 1 until 7 , characterized in that a sealing adhesive (17) is provided for sealing the first transverse edge region (10a) and the second transverse edge region (10b), which is only partially arranged in the respective transverse edge region (10a, 10b). Paper tubular bag (1) according to one of Claims 1 until 8th , characterized in that sealing adhesive (17) is provided for gluing the base paper sheet (1) to the reinforcing paper sheet (13) and for sealing the longitudinal edge areas (8), the first transverse edge area (10a) and the second transverse edge area (10b), wherein the proportion by weight of the sealing adhesive (17) on the paper tubular bag (1) is at most 5%, preferably at most 3.5%. Paper tube bag blank (15) for producing a paper tube bag (1) according to one of Claims 1 until 9 , comprising a bendable base paper sheet (2) with two longitudinal edges (6), wherein sealing adhesive (17) is applied at least in one of two longitudinal edge regions (8) having the longitudinal edges (6), wherein in transverse regions (19, 19'; 10a, 10b ), which run transversely to the longitudinal edges (6) and connect them to one another, sealing adhesive (17) is applied, between the longitudinal edge regions (8) a planar reinforcement section (11) is provided, in which the base paper sheet (2) is glued to a reinforcement paper sheet (13) and wherein at least one through-hole (14) through the paper tubular bag blank (15) is provided in each piece region (16) of the reinforcement section ( 11), the respective piece portion (16) being between the longitudinal edge portions (8) and between two transverse portions (19, 19'; 10a, 10b) which follow one another and are spaced from each other by a distance measured along the longitudinal edges (6). , Is arranged, wherein the paper tube bag blank (15) is preferably formed as rolled goods.

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