CN1159791A

CN1159791A - Self-supporting solvent package bag

Info

Publication number: CN1159791A
Application number: CN 95195415
Authority: CN
Inventors: R·普菲尔; S·马克斯; T·舍斯特兰德; O·特林克豪斯; F·霍姆巴赫
Original assignee: Tetra Laval Holdings and Finance SA
Current assignee: Tetra Laval Holdings and Finance SA
Priority date: 1994-10-14
Filing date: 1995-09-15
Publication date: 1997-09-17
Also published as: PL319575A1; WO1996011859A1; EP0784578A1; JPH10507150A; CA2197325A1; AU3567695A; MX9701615A; DE4436725A1; BR9509333A

Abstract

The invention relates to a packaging bag for flow medium, which can be made by sealed flexible materials. The invention is provided with a bottom surface(1), sidewalls (2,2',4,5),sealing joints(10 -15) for connecting the sidewalls, and a dumping device (9). The quotient(Q) between the proportion of the filling capacity of the packaging bag and the surface area of the packaging area and the proportion of the filling volume of a sphere and the surface area of the sphere is ranged from 0.8 to 0.85; a good proportion is arranged between the thickness of the packing material and the filling volume, and a good dumping angle is provided; the scheduled packaging volume can be reduced, and more single materials are adopted for quality assurance; furthermore, a certain upright capacity can be maintained.

Description

Stand-up package for flowable media

The invention relates to a erectable package for flowable media, made of a flexible sealable material, having a bottom, side walls, a sealing seam connecting the side walls, and a pouring device.

The packaging bags for such flowable media are commercially available in colored packages and refillable packages for cleaning agents. The material of the bag is a multi-layer sealable material to produce a rigid bag which is sealed and able to stand upright when filled. The bottom edge of the side wall is expanded to allow a conventional bag having a wider bottom and a narrower top to stand on the lower edge of the side wall by flattening the top of the side wall and joining it with a longitudinal sealing seam extending to the bottom and the bottom being otherwise sealed. A closure flap or an opening or a flag is provided on the upper portion as pouring means to allow the end user to open the closure flap or tear or cut the pull tab to pour the liquid.

The conventional stand-up packaging bag uses a plurality of layers of plastic sheet materials, which cause recycling problems due to difficulty in separating the layers, and thus the stand-up cost is high. Inserting an additional strip of material for the bottom liner adds to the material and manufacturing costs of the prior art package.

The object of the invention is therefore to improve a packaging bag for flowable media of the type described above in order to reduce the packaging volume for a predetermined packaging quantity and to use simpler materials in terms of quality, for example materials with a low tensile modulus at a predetermined thickness, which is characterized by an acceptable ability to stand upright and which can preferably also be used for larger filling capacities.

This purpose is realized by the following technical scheme of the invention:

a. the quotient (Q) of the ratio of the filling capacity of the packaging bag to the surface area of the packaging bag and the ratio of the volume of a sphere to the surface area of the sphere is between 0.8 and 0.85;

b. the size of the package is selected so that

aa, A and B are 0.55-0.99, preferably 0.7-0.95, most preferably 0.85-0.9;

bb. ((a + B)/2): C ═ 0.9 to 1.7, preferably 0.95 to 1.4, most preferably 1.05 to 1.25;

cc. ((a + B)/2) C): E is 50-120, preferably 55-82, and most preferably 60-65 units;

dd, where f: ((a + B)/2+ C) ═ 1 to 0, preferably 0.5 to 0, most preferably 0.25 to 0;

ee.g. a ═ 0 to 1.3, preferably 1.2 to 2.8, most preferably 1.1 to 0.9;

wherein:

front bottom edge of packaging bag

B is rear bottom edge

C is equal to the side bottom edge

E-front vertical projection

F is front longitudinal edge

G is rear upper side

(A + B)/2) C is the surface area of the bottom (1) which may be trapezoidal

c. The tensile modulus is in the range of 200-;

d. the ratio of the thickness cube of the packaging bag material to the filling capacity of the packaging bag is in the range of 0.000027-0.004 cubic millimeter/cubic decimeter;

e. the angle of tipping (α, β, γ) at which the bag itself tips over beyond a certain angle is greater than 10 ° in the longitudinal direction and greater than 8 ° in the transverse direction.

The new package according to the invention requires considerably less material and is simpler in terms of quality than the packages for flowable media of the prior art, and is characterized in that the ability of the package to stand up is nevertheless comparable to that of the prior art packages. The above-mentioned features according to the solution of the invention provide a different design compared to the existing colored packages. In other words, the existing type of bag cannot be manufactured at the cost and quality of the material used in accordance with the present invention, or the bag cannot be made to stand upright. If the features according to the invention are used, a package is obtained which, during filling, changes its shape of manufacture but ultimately ensures the desired properties of the package, in particular good standing ability and easy handling. The internal pressure of the liquid contents allows the prior art packages to assume a generally cylindrical shape, which is characterized by the ability of the package material to absorb tensile stresses.

Characteristic a includes two ratios. The first ratio is the ratio of the fill volume of the bag to the surface area of the bag, and the second ratio is the ratio of the volume of a sphere to the surface area of the sphere. Those skilled in the art know that on the one hand an optimization of the surface area of the packaging bag, which is made in particular of a flexible material and changes its shape when filled, is sought and on the other hand an approximation of this ratio in the case of spheres is desired. According to the invention, it is assumed that the quotient of the two proportions determined for the packaging bag on the one hand and for the sphere on the other hand requires virtually the same filling capacity.

It can also be seen that the packaging bag according to the invention has the same advantageous features, in particular for example 3 liters or more in filling capacity.

Although the advantageous feature a according to the above-described structure should be observed, it is advantageous to provide the size of the package according to the feature b at the same time. To this end, a theoretical package shape is assumed, wherein the package has a square, preferably trapezoidal, bottom surface, two side walls extending from the side bottom edges of the bottom surface meeting at a front region top line, and a front wall extending above the front bottom edge to the same top line of the two side walls, wherein the same top line can also be considered as front side edge. Accordingly, a rear wall extends above the rear bottom edge and terminates at a rear upper edge perpendicular to the longitudinal edges. An approximately triangular top wall may also be provided between the rear upper edge and the front longitudinal edge. If the package is viewed in a direction parallel to the plane of the bottom surface, a front vertical projection, i.e. a view from the front bottom edge up to the front longitudinal edge, is visible. At the same time, a rear vertical projection from the rear bottom edge up to the rear top edge can be seen on the rear wall if viewed from the opposite direction, i.e. from the rear onto the rear wall. In this theoretical model it is assumed that the bottom surface and the front and rear walls are both planar. In this case, the front wall is preferably triangular and the rear wall may be trapezoidal or preferably triangular. The long side is referred to herein as the "side base" and the short side is referred to as the front base and the rear base.

With the above definitions, the person skilled in the art can select the size of the package in the desired manner.

In the case where A and B are both greater than 0 and A is less than B, the ratio A to B described in feature B is always positive according to the invention. It is thus recognized that the trapezoidal base resulting from this ratio a: B is considered to be the preferred profile. Such dimensions directly affect the ability to stand. In particular, the package is always tilted towards the rear during filling, while the pouring edge of the package is almost vertical, i.e. the height of the triangular front wall is substantially vertical. For ease of understanding, it may be assumed that the flat bottom surface lies in a horizontal plane, the triangular front wall is projecting generally vertically, and the two side walls are correspondingly inclined along the triangular sides of the front side walls and meet centrally above the bottom surface at the top along the longitudinal sides.

By an optimal choice of the dimensions of the packaging bag according to the invention, an optimal use of the material can be achieved. This means that a good ratio of the surface area of the package to the filling capacity has been discussed above.

When the ratio in feature B (A + B/2+ C) is equal to 1, this means that the rear top edge G is not sealed, i.e. the two side walls meet at the apex along a front longitudinal edge F that is approximately A + B/2 longer than the side bottom edges C. At the other extreme, however, where the ratio is 0, this means that the seal is made from the forward point, i.e. the apex of the triangle, to the rear top edge.

Accordingly, when the next ratio described in feature b, i.e. G: a, is specifically preferably 0, this means that the tab is not sealed. It has been seen that a in this case also results in advantageous package geometries in the range of 1.1 to 0.9. In other words, the result and its significance is that the triangular tab is sealed.

When the person skilled in the art considers feature b according to the solution, the result is a erectable bag-type package with a large tip-over angle. This also means that the package does not empty itself after the pouring device has been opened.

The characteristic c with a range of tensile moduli means that materials of simpler quality can be used, for example materials having a lower tensile modulus at a predetermined thickness than existing bags made of single-or multi-layer thicker plastics. These tensile modulus ranges relate to values which can be determined in accordance with DIN 53457. Some examples demonstrate that a ratio of cube thickness to package fill volume for a package material within the above ranges is preferably 0.0007 to 0.001 cubic millimeters per cubic decimeter.

With thicker bag material, the characteristics of the bag are seen to be particularly robust.

According to feature e of the present invention, the tipping angle is an angle beyond which the bag itself tips. The large tip-over angle means that a good standing ability is obtained according to the invention despite the plastic foil described above. The tipping angle is tested while filling the bag. Here, a distinction is made between the following three tilting angles: the first tipping angle α refers to the angle at which the filled bag tips forward by pressing it over the so-called front wall, and the tipping angle β refers to the angle at which the bag tips laterally towards the respective side bottom edge (towards one side or the other, the bag is preferably designed symmetrically with respect to the longitudinal center line of the bottom surface); and the third tipping angle gamma is the angle at which the bag is tipped backwards towards the bottom rear edge (opposite to the first tipping angle alpha).

The standing ability of the bag according to the present invention may be defined as the standing moment being greater than the tipping moment. When the package is "erected" in the manner defined herein, this means that at least a portion of the height of the package is greater than the length of the edge of the bottom surface of the package. The testing procedure for establishing each tip angle employed a horizontally disposed flat table on which the bottom surface of the filled bag was placed. The table is then tilted, for example, to an increasing angle while the bag is still standing on the table in the tilted position. The angle is increased until the bag is tipped toward the corresponding bottom edge. A tilt table with an angle scale can advantageously be used as a suitable testing device. The tilt angles are actually measured in three directions perpendicular to each other, but since the package according to the invention is of symmetrical construction (tilt angle β), only three tilt angles α, β, γ are given.

Despite the soft and flexible nature of the packaging material, a stand-up package for flowable media according to the invention can be obtained with a very low center of gravity, and it has been determined that the package according to the invention has a higher tipping height than existing packages. By the method according to the invention it is also possible to use a single material with good recycling properties. The folding of the bottom surface uses the usual manufacturing method of plastic-coated paper for liquids, wherein a tube is provided with a cross-sealed seam on the bottom surface, each end of which forms a point of triangular tabs opposite to each other with respect to the bottom surface. These triangular tabs are folded into existing packages for liquids and secured to the bottom surface to provide a flat square upright bottom surface for the packages for liquids.

In the case of a similar manufacturing process for a erectable package according to the present invention, a triangular tab may be provided adjacent the front and/or rear bottom edge that can be folded and sealed in a similar manner to existing packages for liquids.

However, in accordance with the present invention, the package may be designed to have a sealed seam at the front and/or rear bottom edges. The sealed seam can then be used as a score line configured to separate the triangular tab from the bottom surface and can be reworked. The ability of the new bag to stand upright is improved by sealing the triangular tab after the bag is filled, even before filling. It is therefore particularly desirable when the pouring device or the pull tab on one side of the package to be opened is smaller than the other pull tab arranged on the opposite side. In this manner, the bag can be tilted backwards to prevent tipping. At the same time, the trapezoidal base surface can be produced by differently dimensioned triangular pull tabs and the ability to stand upright and stability can be influenced positively in the above-mentioned sense.

Furthermore, according to the invention, it is advantageous when the two side walls and a front wall and a rear wall are connected by side bottom edges to the bottom surface, and when a cross-sealing seam from the front bottom edge to the rear bottom edge and an upper cross-sealing seam at the upper end of the side walls are applied to the bottom surface. In a manner similar to the theoretical package shape described above, it is desirable to have both side walls and a front and rear wall connected to the bottom surface while providing cross-sealing seams at the bottom of the bottom surface and at a distance from the upper ends of the side walls. Thus, the sealing is performed according to the upper cross-sealed seam either from the front of the apex of the triangular front surface back to the rear upper edge or from the rear upper edge forward to the beginning of the front longitudinal edge. Theoretical considerations may be best understood in particular when assuming a straight cross-sealed seam. In the case of a planar bottom surface, the lower cross-sealed seam is obviously virtually straight. The upper cross sealed seam can however be somewhat imagined as a long front longitudinal edge, wherein its angle of arrangement with the cross sealed seam on the side edge of the bottom side can be acute, preferably 0 to 30, most preferably 5 to 25. In this case 0 ° means that the upper cross sealed seam is parallel to the lower cross sealed seam.

When sealing different size corners on the bottom surface, i.e. keeping the triangular tab in different sizes in the sense defined above, the package does not empty when the lower cross sealed seam is parallel to the upper cross sealed seam when the pouring device is opened. Having the upper cross sealed seam arranged at an angle with respect to the lower cross sealed seam, i.e. the upper cross sealed seam is inclined with respect to the lower cross sealed seam, has the advantage that the amount of air above the liquid in the package and thus the direct contact of the liquid with the air in the bag is reduced. By the upper cross sealed seam being inclined relative to the bottom surface, the package can be filled to a higher level with good pouring characteristics. Furthermore, the centre of gravity of the liquid is advantageously moved forward in the direction of the front bottom edge to facilitate pouring.

It is further advantageous when the upper cross sealed seam consists of at least two straight and/or curved line sections. In this preferred embodiment, the upper cross sealed seam does not span the entire package in a straight line, but is divided into different sections. This method reduces the amount of air in the head of the bag, moves the center of gravity in a desired manner and improves pouring.

It is also advantageous according to the invention when at least part of the upper cross sealed seam is provided with an upper pull tab formed of folded material forming a handle. In the manufacture of a package from a tube according to the invention, when the upper cross sealed seam is disposed at an angle to the lower cross sealed seam, a portion of the folded material which can be used as a handle remains and can be reinforced by the other end sealed seam. Thus, the package according to the invention has three cross-sealed seams from bottom to top, namely a bottom sealed seam, a cross-sealed seam at the top delimiting the side walls, and a later-described so-called end sealed seam, delimiting the folded-up upper part of the material, as will be described again below. Following the trajectory of the upper end sealing seam it can be joined with or enter into a so-called upper cross sealing seam delimiting the side wall at the top. Even if the material portion above the upper cross-sealed seam is simply caught between the fingers of one hand, a good handle for the user can still be provided by the material portion formed in this way.

The end sealing seams arranged above the upper cross sealing seam may be arranged every place or somewhere above the upper cross sealing seam. In this way the material portion formed between the upper cross-sealed seam and the end-sealed seam is greatly reinforced and strengthened. In this way and making it better usable as a handle or for providing additional means for forming a better handle.

For example, it is advantageous according to the invention when an elongated load distributing means is incorporated into the folded-up upper tab below the straight end sealing seam. A rod, a tube or an extension plate can be considered as a load distributing device to be mounted under the uppermost cross-sealed joint, i.e. the end-sealed joint, and supported thereby.

In addition, to further improve the handle, it is particularly advantageous when, according to the invention, a handle is formed on the upper tab when the holes or openings are arranged at a distance from each other-similar to the finger arrangement of a hand. The elongate aperture of the plastic portion itself acts as a handle. However, when a plurality of holes, similar to the finger arrangement of one hand, are provided-the folded-up upper tab-below the straight end sealing seam, this provides a better load distribution, as a result of which the resistance to stress of the handle manufactured in this way is increased. The bag can be removed more easily from the stack, on a shelf or the like by the arrangement of the handle at the upper part of the bag. When considering the method according to the invention, it is also possible to provide the handle in the upper rear region of the package, i.e. at a distance from the pouring device, in order in this way to facilitate and improve the pouring of the liquid. In addition, it is easier to fit differently designed pouring devices on the front wall or at least the top of the front region of the package.

Another advantage is that the provision of the hole or opening eliminates the need for reinforcement of the material of the folded-up upper tab between the two cross-sealed seams. By configuring the aperture to resemble the fingers of one hand, the load is better distributed to the edges of the hole. For example, it is advantageous to design holes larger than 20 mm, preferably 22 mm, to create an ergonomic configuration and minimal loading of materials.

When describing the ratio of bag material to fill volume, the above numbers do not include material in the handle area.

The handle can also be designed in many ways and has various advantages in connection with the package according to the invention. The embodiment with the finger hole in the folded-up tab ensures that the material has better strength and tensile stress distribution without the need for a rod or the like as a load distributing means. According to the invention, the handle can also be advantageously arranged in the folded-up upper tab area when the top part is above the upper cross sealing seam connecting the two side walls and forms a folded-up upper tab, whether reinforced by a further end sealing seam just at the top or without such an end sealing seam. An upper pull tab is formed with each angled upper cross-sealed seam, while the space above the liquid level is narrowed forward and has the advantage of improved pouring and gravity center distribution.

However, when considering the method of the present invention, the most important advantages are improved erectability and greatly reduced material costs.

Further advantages, features and possibilities of the invention will be elucidated by the following description of a preferred embodiment in conjunction with the accompanying drawings. Wherein,

FIG. 1 is a theoretical model of a bag showing precisely the edges and walls;

FIG. 2 is an embodiment of a package for flowable media with a sealed seam, similar to but more specific than FIG. 1;

FIGS. 3-5 are further other embodiments of packages for flowable media wherein the upper cross sealed seam is at a different angle than the end sealed seams;

FIG. 6 is a schematic perspective view of a further embodiment of a package for flowable media according to the invention, but wherein an elongated tube is mounted over the end seal seam as a load distribution device;

FIGS. 7-9 are views similar to FIG. 6, wherein the handle is replaced with a hole in the folded-up upper tab;

FIGS. 10-12 are schematic views of an exemplary package for flowable media showing the corresponding tip angle during measurement;

fig. 13 is a perspective view of a flowable media filled package with a handle and a foldable triangular tab.

Fig. 1 shows a theoretical or ideal model of a erectable package for flowable media with straight sides and planar walls. The bottom surface 1 is plane and is conceived to rest on a horizontal plane support. The bottom surface is defined by a front bottom edge A, a back bottom edge B, and two side bottom edges (where the front side bottom edge is labeled C). Two side walls 2 and 2' are connected to the bottom surface 1 above two side bottom edges C, which side walls meet at the top along a front longitudinal edge F above a central longitudinal centre line 3 of the bottom surface. And a front wall 4 and a rear wall 5 are connected to the bottom surface above the front bottom edge a and the rear bottom edge B. The front perpendicular projection E is located where the longitudinal centerline 3 of the bottom surface 1 intersects the front base a. The upper end point of this front vertical height E is marked 6 and represents the point of the isosceles triangle of the front wall 4 from which the front longitudinal side F extends rearwards parallel to the side base sides C to point 7. The distance between the

points

6 and 7 thus represents the length of the front longitudinal edge F.

In a similar manner, a rear vertical projection D, which represents the vertical distance of the mutually parallel rear base B and rear upper G, can be seen when viewed perpendicularly from behind towards the rear wall 5. It can be seen that in the embodiment of figures 1 and 2 the rear upper edge G is greater than 0, that is to say the rear wall 5 is trapezoidal, while a triangular surface 8 extends between the rear end of the front longitudinal edge F and the rear upper edge G. If the length of the rear upper side G is 0, the upper triangular surface 8 disappears and the rear wall 5 is an isosceles triangle.

In many embodiments, in particular the embodiments shown in fig. 3 to 13, the rear upper side G is eliminated, i.e. G is 0. Therefore, the ratio G: A is also 0. This is a preferred embodiment, which exhibits a number of advantageous characteristics.

A common plane can be envisaged passing through the front bottom edge a and the rear upper edge G, and then in the case of the embodiment of figures 1 and 2 the package is divided into two geometries, namely an inclined wedge with a bottom surface 1 and an inclined prism with a front wall 4 and a triangular surface 8. The total volume of the package can also be considered to be the sum of the wedge and the prism.

In all embodiments, the pouring device is designated 9 unless otherwise specified. It may be provided with a tear tab (fig. 2 to 5) or a screw cap (fig. 6 to 9 and 13) or other means such as a cut or logo independent of the basic idea of the invention.

The basic concept shown in fig. 1 is represented in a more specific manner in fig. 2 as a packaging bag for flowable media with a sealing seam. In particular, a sealing seam 10 extends along the front edge a, while a sealing seam 11 parallel thereto is present on the rear edge B. Which intersect a longitudinal central sealed seam 12 running parallel to the longitudinal centre line 3 in the bottom surface 1. The front wall 4 is smooth and the pouring device 9 is only installed in the upper area; at the same time, a sealing seam 13 passes through the rear wall 5. Along the rear upper edge G a further sealing seam 14 is provided which runs parallel to the sealing seam 11 and intersects an upper cross sealing seam 15 which extends from the rear upper edge G through the upper wall 8 and the height of the isosceles triangle up to the rear end point 7 and at an angle along the front longitudinal edge F up to the front corner 6.

In the case of the embodiment according to fig. 2 to 5, the front edge a is provided with a sealing seam 10 and the rear edge B is provided with a sealing seam 11, without the triangular tab; the embodiment of fig. 8 shows two unsealed triangular pull tabs 16, although provided with two sealed

seams

10 and 11. The triangular tab 16 is simply folded along the latter and applied to the base 1 to enable the bag of figure 8 to be re-erected.

When the upper cross sealing seam 15 extends straight or has a rear corner 17 from the front corner 6 of the front wall 4, the rear corner should be seen as being sharp due to the rear upper edge G becoming 0, as shown in the relevant embodiments in figures 3 to 9 and 13. In fig. 3 and 5, the upper cross sealed seam 15 first extends along the front longitudinal edge F to its rear end point 7 and then bends at an angle different from 0 to the central longitudinal sealed seam 12 in the bottom side 1. In this case the cross-sealed seam, generally designated 15, consists of a straight portion 15a providing the front longitudinal edge F and a rear angular portion 15b ending at the rear end point 17. However, the upper cross-sealed seam 15 is again from the front upper end point 6 to the rear end point 17 as was the case with the other embodiments, so that the filling capacity of the packaging bag is limited. In the embodiment according to fig. 4 and 6, an upper pull tab 18 formed from the folded-over portion of the material is secured over the entire upper cross-sealed seam 15 and may be used as a handle 19. In other embodiments according to fig. 3 and 5a folded tab 18 is formed above the portion 15b of the upper cross sealed seam 15. If the material portions of the side walls 2 and 2' are left uncut and extend over the portion 15b of the upper cross sealed seam 15, an upper tab 18 is formed by the folded over material portion 18.

The upper pull tab 18 can now be reinforced by a further sealing seam, i.e. an end sealing seam 20 added at a distance above the upper cross sealing seam 15. If the rear edge of the folded-up upper tab 18 is additionally sealed, this means that a reinforcing seam 21 is provided to provide further reinforcement. That is, in the embodiment according to fig. 3 and 5, the folded-up upper tab 18 is bounded by three sealing seams forming a triangle, namely an upper crosswise sealing seam 15 and sealing

seams

20 and 21 to be described below, which seams 20 and 21 are in this case perpendicular to each other. In the embodiment of fig. 4, the upper tab 18 is also triangular in shape with the upper cross sealed seam 15 being the hypotenuse and the sealed

seams

20 and 21 being perpendicular to each other. The triangular tab can in each case be used as a handle for supporting the pouring.

The proportions in figures 6 to 9 are the same with respect to the triangular tab 18. In the embodiment of fig. 6, however, an elongate tube 22 is arranged in the folded-up upper pull tab 18 in a support 23 made of folded-up plastic material above the linear end sealing seam 20 and is held by a further holding sealing seam 24 arranged above the upper end sealing seam 20. It goes without saying that the gripping of the tube 22 provides an improvement and in addition facilitates the pouring.

In the embodiment according to fig. 7 to 9 and 13, holes 25 are arranged at a distance in the upper pull tab 18, which is formed as a handle and is generally designated 19, but these holes can also be replaced by a U-shaped opening. According to fig. 7, this relates to four holes 25 arranged and arranged in the pull tab 18 in a similar manner as in the case of the fingers of one hand.

In the embodiment of fig. 8, the four holes 25 are replaced by an elongated hole 25a, whereas in the embodiment of fig. 9 it is the case of a handle 19 arranged in an easy-to-grasp manner by two slightly angled elongated holes 25 a.

Two elongated holes 25a are also seen in the strip-shaped folded tab 18 in fig. 13. This is delimited at the top by the end sealing seam 20 and at the bottom by the upper sealing seam 15. The latter is divided into a curved front portion 15a and two slightly curved rear portions 15 b.

In the embodiment of fig. 13, the triangular tab is shown folded down in the lower region without a sealing seam and applied to the bottom surface 1.

When considering fig. 11, the longitudinal direction 26 of the package is seen, which is reproduced by the arrow pointing to the left of the front wall 4 in fig. 10. A tilting table 28 is arranged on a horizontal support 27 and is tilted relative to the horizontal support 27 in the manner shown.

In the case of fig. 10, the filled bag is poured in the direction of curved arrow 29 around front bottom edge a, while bottom surface 1 together with tilting table 28 is assumed to be at an angle α relative to support 27. If the bag is still upright and not tipped, the angle alpha is increased until the angular limit, the so-called tip angle alpha, is reached.

According to fig. 12, the tilting table 28 is tilted in the opposite direction, i.e. backwards, around the rear base B in the direction of the curved arrow 30, assuming that the bottom surface 1 together with the tilting table 28 is at an angle γ with respect to the horizontal support 27. In this case the process is performed in the manner described above and it is determined whether the bag is standing or tipping at the selected angle gamma.

The transverse tipping angle is determined according to fig. 11, since the package is designed to be symmetrical with respect to the longitudinal centre line 3, the transverse tipping angle in one direction is the same as the transverse tipping angle in the opposite direction. In this example, the tilting table 28 is tilted by a transverse tilting angle β as a result of the transverse tilting according to the curved arrow 31.

Claims

1. A packaging bag for flowable media, made of a sealable flexible material, having a bottom (1), side walls (2, 2', 4, 5), sealing seams (10-15) connecting the side walls, and a pouring device (9),

b. the size of the package is selected so that

aa.a to B is 0.55 to 0.99, preferably 0.7 to 0.95, most preferably 0.85 to 0.9;

cc. ((a + B)/2) C): E ═ 50 to 120, preferably 55 to 82, and most preferably 60 to 65, length units;

ee.g. a ═ 0 to 1.3, preferably 1.2 to 2.8, most preferably 1.1 to 0.9;

wherein:

front bottom edge of packaging bag

B is rear bottom edge

C is equal to the side bottom edge

E-front vertical projection

F is front longitudinal edge

G is rear upper side

(A + B)/2) C is the surface area of the bottom (1) which may be trapezoidal

c. The tensile modulus is in the range of 200-;

d. the thickness cube of the packaging bag material and the filling capacity of the packaging bag are in the range of 0.000027-0.004 cubic millimeter/cubic decimeter;

2. The package of claim 1 wherein the ratio of the package material thickness cubic to the package fill capacity ranges from 0.0007 cubic millimeters per cubic centimeter to 0.001 cubic millimeters per cubic centimeter.

3. A package as claimed in claim 1 or 2, characterized in that the front and/or rear bottom edge (a, B) is provided with a sealing seam (10, 11).

4. A pack as in any claim from 1 to 3, wherein a. the two side walls (2, 2') are above the side bottom edge (C);

b. the front wall (4) and the rear wall (5) are connected with the bottom surface (1); and

a cross sealing seam (12) from the front bottom edge (A) to the rear bottom edge (B) is additionally arranged in the bottom surface (1); and an upper cross sealing seam (15) is added to the upper end of the side walls (2, 2').

5. A package as claimed in any one of claims 1 to 4, characterized in that said upper cross-sealed seam (15) consists of at least two straight and/or curved portions (15a, 15 b).

6. A package as claimed in any one of claims 1 to 5, characterized in that an upper pull tab (18) formed by a folded-over material portion is provided at least partially above said upper cross-sealed seam (15) to form a handle (19).

7. A package according to any of claims 1 to 6, characterized in that an end sealing seam (20) is provided at least partly at a distance above the upper cross sealing seam (15) at the upper outer end of the folded-up upper pull tab (18).

8. A package according to any of claims 1 to 7, characterized in that an elongate load distributing means (22) is provided in the folded-up upper tab below the straight end sealing seam (20).

9. A package as claimed in any one of claims 1 to 8, characterised in that in the upper pull tab (18) there are provided holes (25, 25a) or openings spaced from each other in a similar array to the fingers of a hand to form a handle (19).