NL8005940A - TOBACCO DRINK WITH A BOX-FORMED PART, AND METHOD FOR MANUFACTURING IT. - Google Patents

Description

-1- 803359 / Ke / cd

Short designation: {Tobacco pouch with a box-shaped pouch, alsae · the method τοογ its manufacture ·

The invention relates to a tobacco pouch having a rigid pouch part of the type given in the preamble of claim 1, as well as to a method of manufacturing the pouch. Such tobacco pouches are well known; the intermediate layer normally consists of paper and is optionally provided with transverse fold lines for the formation of the inwardly turned bottom fold. The intermediate layer also has such a width that box-shaped tobacco pouch can be folded along the sides of the filled-in condition. for this reason the intermediate layer is previously provided with two longitudinal fold lines for the formation of the paper layer along the side surfaces of the tobacco pouch downwards, so that the side strips formed thereby extend from both sides approximately to the center of the side surfaces stretch · Sr has shown that such a tobacco pouch for filling is difficult to put upright at the tobacco manufacturer, because the gripper fingers provided for this purpose on the filling machine do not always form the tobacco pouch, because the side strips tend to go outwards. to nod and the pouch, seen in section,

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deforming into an elongated hexagon · Set of paper in the side walls is further hindering the welding along the side walls to close the pouch, for which reason such pouches have so far not been provided with an aroma-tight closure, but only a simple one on the flap have adhesive strip, which holds the flap over the opening ^ to prevent the tobacco from falling out · As a result, only polyethylene foil has been used for this voxm of tobacco pouches and has not been thought of the barrier · further improve the properties of the packaging ^

The object of the invention is to provide a filled state of substantially 3 ° box-shaped tobacco pouch which guarantees a safe passage through the packaging machine and which is more easily formed by the tobacco and can be closed flavor-tightly. • 8005940 • 2 · »

Sit objective voxdt according to the invention achieves in the manner described in the characteristic part of oonelusion 1 * Because the intermediate layer ill does not extend all the way to the avenue seam, but has a width exactly corresponding to the largest width 5 of the pouch part in filled condition, it is ensured that the pouch can pass the packaging machine more easily and that it is better unformed in that machine, because it remains box-shaped in a more secure manner. Because no paper is present in the side walls of the belt part, they can be easily medium 10 of the tobacco oavoxmen to an inwardly turned side gusset »This side gusset can be welded together to close off the side walls» as a result, an adhesive strip is applied with the feed part to close off the opening of the pouch, so that an aromatic package is obtained, which until now ^ was not possible with this type of tobacco pouch »

The following is achieved with the measures described in the subconditions

Conclusion 2s The stiffening strip, which extends over the entire width at the end edge of the closing flap, further prevents these weak corners from being unintentionally bent.

Conclusion 3 * By the choice of the kumst fabric materials to be mentioned below, a control is achieved of the gas permeability of the pouch, d »w» z »the barometric properties of the crazy on-bineexed synthetic webs» Beze barribre properties are determined on the basis of of the following units water vapor transfer rate is measured in g / m / 24 h at 90 $ relative humidity and 38 ° C, the oxygen permeability is measured in ^ ^ / m2 / 24 h / atm »at test conditions with 0 $ relative humidity and 23 ° C, and 3 2 the permeability to carbon dioxide is measured in car / m / 24 h / ata »under test conditions with 0 $ humidity and 23 ° C»

With the correct choice of material, these barrift properties can be chosen from non-measurable layers or, for example, with barribre properties for water from 2.0 g / m / 24 h and up to 7.5 og / m / 24 h »Or more, a permeability for oxygen between 2 and 3400 cm ^ / m2 / 24 h * / atm» and a permeability for carbon dioxide between 6 and 10 000 c »^ / m2 / 24 h / atm»

As a result, the tobacco manufacturer is also given the opportunity for this type of 8005940 X -i tobacco pouch to choose those barrier properties that suit the tobacco with which the pouch must be filled *.

Conclusion 4 * This gives a tobacco pouch that is 5 softer and more flexible *

Conclusion 5 * This guarantees the possibility of manufacturing a box-like semi-rigid packaging that can still be closed in an aroma-tight manner *

Conclusion 6: This ensures that the intermediate layer 10 is held in the correct position relative to the side weld seam and thus has no possibility of sliding *

Conclusion 7 * The said metalization allows further control of the barrier properties and ensures that the tobacco cannot be seen through the side walls of the pouch; furthermore, it ensures that all tracks feel as if they were one and do not shift relative to each other *

Conclusion 8; The embodiment of the adhesive strip mentioned above guarantees the stiffness required for simple control by the tobacco filling machine, and the construction of the paper strip ensures that it can be welded to the inner plastic layer and, according to a specific embodiment, can be attached to the intermediate layer to hold it *

Conclusion 9 $ Here a possible embodiment is described in which the adhesive strip is applied to the outer web, so that a bent edge is formed at the opening of the pouch mouth which can be grasped more easily by the user *

Conclusion 10; The simplest embodiment is mentioned for sealing the pouch part with a certainty of sealing. Claim 11; This creates a small fold of grip where the user can pull when opening the pouch

Conclusion 12; The choice of adhesive stated ensures that the pouch can be sealed within a temperature range between approx. 90 ° to approx. 150 ° C when closed, where 33 the tobacco manufacturer has previously been forced to stay within a significantly smaller temperature range, n «From 150 ° C to 140 ° C«

At the stated temperatures, the inwardly curved side gussets are fused together at the same time to ensure complete closure of the entire opening * 8005940 -4-

Conclusion 13 * The measure mentioned here ensures a correct bending in the packaging machine «

Conclusions 14 to I71 This makes it easier to bend and close the opening of the outside Idea 1 after-3 that the pouch is filled with tobacco ·

Conclusion 18 * This provides a simple method for the manufacture of a tobacco pouch with an inwardly turned bottom fold and a closing flap and with a filled-in condition essentially a box-shaped pouch part, and which packaging according to the invention has been closed with flavor.

Conclusion 1j> * This provides a simple method for applying the stiffening strip ·

Conclusion 20 * Hear the application of the stiffening strip in this way, the beate stiffening is guaranteed · 13 Conclusion 21 * The perforation ensures the correct bending of the packaging machine and prevents manufacturing disturbances · The term "box-shaped" used in this ban means that the pouch part has a shape corresponding to a substantially rectangular parallelepiped; the invention will be elucidated hereinbelow with reference to the accompanying drawing of a preferred embodiment.

Fig.1 shows a tobacco pouch according to the invention *

Fig. 2 shows on a smaller scale the three matexial layers to be combined with each other for the manufacture of the tobacco pouch according to the invention; lie 3 is an enlarged section taken on the line III-III in fig 1 of a detail in a special embodiment;

Fig. 4 and 3 toes in the same manner as in Figs. 1 and 2 another embodiment, and Fig. 6 to 9 show pieces of the blank when opening the pouch part, and special embodiments to facilitate closing the pouch part ·

Figures 1 and 4 each show a tobacco pouch 1 according to the invention which is ready for filling. · It has an inwardly flat bottom fold 2 inward position 2 and a closing flap 3 as well as a substantially thaw-shaped pouch part 4 when expanded.

An adhesive strip 3 is adhered to the outside of the closing flap for detachably holding the closing flap over the pouch part. The tobacco pouch is made of an outer plastic layer 6 and an inner plastic layer 7, which are cut out of the 8005940 * i in Fig. 5 foil «like plastic strips 6 *, 7 * shown · An intermediate layer in the form of a folding paper 8 * has been placed between the two plastic layers, but materials other than paper can also be used» At the same time as placing the intermediate layer, a stiffening tape 17 is placed between the sheet of paper 6 and 4 one of the plastic layers 6 or 7 »The stiffening strip 17 may be a strip of paper which is provided on one side with a welding medium which adheres to paper and on the other side of a welding media that adheres to the plastic used · When placing the adhesive strip 17 * it holds the layer of paper 6 at the end that the end edge 16 of the back terwand 11 must form o A color marking and text is printed on the inside of the outer plastic layer or the outside of the sheet of paper 8, in the latter case the outer plastic layer must be transparent ·

The superimposed material layers are folded relative to each other and welded along the side edges of the plastic layers 6, 7, forming weld seams 9, and the inwardly folded bottom (at 2), the front wall 10 and the back wall 11 with an extension for the formation of the closing flap are formed · After folding, the bundle is perforated in the width of the stiffening strip 17 at the edge of the layer of paper (at 22) to ensure that in the packaging machine in the correct way is bent over »

The intermediate layer or the inlaid layer of paper 8 has a width 25b which corresponds to the largest width of the box-shaped pouch part 4 in the filled state and is arranged between the plastic layers 6, 7 in such a way that the side edges 12, 15 thereof are substantially the same tooth. from the side edges of the plastic webs. This distance corresponds to half the thickness 1/2 t of the box-shaped pouch 30 plus the width β of the welds 9 on the side

The intermediate layer or the separate layers of paper 8 are attached to the outer plastic layer 6 on both the transverse end edges 15, 16 of the pouch and / or the inner layer 7, this fixing can optionally be by welding, the layer being one plastic layer 6 or 7 can be attached to the adhesive strip 17 *, which is simultaneously welded to it, and which is simultaneously welded to the sheet of paper. When the stiffening strip 17 to be described below is used, the sheet of paper 3 is directly the two plastic layers 6, 7 are attached. the entire width and consists of 5 suitable materials · Beet is preferably a strip of paper, two of which are covered by slightly different polyelefins, the inner knit fabric layer 7 facing side is preferably covered with a low density polyethylene and welded to this knit fabric layer, while the free side is covered with a high density polyethylene 10

At the end edge 15 at the opening 18 of the pouch part parallel to the end edge and at a small distance within that end wall or just opposite, and on the inwardly facing side, a layer of binder which is heat-reactivable has been applied in the shape of a transverse strip 19 * 0 In the embodiment shown in the drawing, this strip is applied to the inner layer of fabric 7, but it can also be applied to the outer layer 6, which is then bent over again so that it then faces inwards. turned ferry with the binder strip · This last-mentioned embodiment has the advantage that it forms a less rigid opening edge at the end edge 15; also compare fig · 5 with the accompanying description ·

The material of both the outer layer of fabric 6 and of the inner layer 7 is preferably selected from the polyolefins and may be formed by webs 6 ', 7' or from a layer of copolymer coated polypropylene or one of polyethylene and one a layer of a copolymer-coated polypropylene laminate, or a polyester and either polyethylene or, preferably, a copolymer-coated propylene laminate consisting of · The intermediate layer is made from a web of paper with a weight of more than 60 g / 2. m, preferably between 80 and 100 g / m, but it may also be made from a paper web weighing approximately 300 to 500 g / m, preferably approximately 400 g / m

In the latter case, a semi-rigid cardboard is obtained, so that the finished tobacco pouch looks like a box · On other materials than paper can be used for the intermediate layer · Under all circumstances the inner layer can be metalized on the side that has turned away from the inside of the pouch.

By choosing the materials used, it is advantageous to adjust the barrier properties of the outer material 8 oo 5 9 4 0 -7- from non-seetable layer, or, for example, with water barrier properties of 2.0 g / m per 24 h up to 7.5 g / m per 24 h or more, an oxygen permeability of between 2 and 5400 24 h / atm.

and carbonation permeability between 6 and 10,000 car / m / 24 h / ata, 5 whereby the tobacco bundle can be manufactured according to the tobacco with which the pouch is to be filled

The intermediate layer or the sheet of paper 8 is optionally held by welding on the two plastic layers 6,7 »layers and close to one or both transverse end edges 15, 16 ·

When the inner layer is not metalized, it is preferable that the outer layer 6 is made opaque to the side walls 21 of the pouch part 4 in order to avoid influence of light on the tobacco.

Fig. 5 shows a section along the line Ill-Ill in Fig. 1 15 of the embodiment in which the adhesive strip 19 "is applied to the outer layer 6 which is elongated with a bent edge strip 20 forming a small concealed grip wire ·

It is preferable to use a binder which is heat-reactivable and which guarantees an easily detachable, tight seal by cooling to normal temperature. · Seze glue is preferably selected from the "hot melt" adhesives and preferably consists of an ethylene vinyl acetate polymer, wax and synthetic resins · It preferably has a viscosity chosen in the range between about 1400 and about 500 cP at 150 ° C, preferably between about 1800 and 2500 ePe The adhesive is applied in a thickness of bags 1 and 4p> preferably between 2 and 5 μη

Such an adhesive has the property that after application and cooling it has no tendency to join and glue together the surfaces which can be turned during manufacturing, storage and shipping, by a generally known method, be reactivated at the tobacco manufacturer after filling the pouch with tobacco · It also has the property that it can be reactivated throughout the temperature range from approximately 90 ° to approximately 150 ° C so that the pouch closes tightly. no more precise temperature controlled control is needed in the range between 150 ° C and 140 ° C as was the case with commonly used adhesives, which was very difficult.

The chosen glue has another advantage · When it is used for the interconnection of two of the same materials, ie «inner chasing against outer layer according to fig. 1, 2 and 4», 8005940 -8- a weaker connection is created when these layers are dixed against each other welded · Before it is used for interconnecting two different materials, n «l« inner layer against outer layer as shown in fig. 3, a stronger connection is created if 5 if one tries to interconnect these layers only by the influence of heat ( welding), which is impossible even in certain cases · Furthermore, he sees the advantage that he guarantees a secure, aroma-tight seal by sticking the two surfaces together, but this connection is no stronger than that it is easy for the user to open the pouch without tearing the plastic layers as can easily be done by welding the low n · When opening the pouch again, the glue is inactive, so that the tobacco does not stick to it. · 15 At the same time as this is glued, the inward-facing side gusset formed at the opening 18 in combination with its closure is welded, so that an overall density is obtained, while the sheet of paper or intermediate layer 8 does not extend all the way to the side seal of the pouch part 4 · Angry dense seal was hitherto * due to the hitherto in the sidewalls of the pouch part of the layer of paper present, not possible

In order to facilitate the bending and sealing of the tobacco pouch after filling with tobacco, the outer layer 6 and the inner layer 7 in a particular embodiment may be in an area 9, which is substantially bounded by the longitudinal edge of the intermediate layer 8, the opening 18 of the pouch part, the end edge 16, the back wall 11 of the pouch and the longitudinal common edges of the layers 6, 7 are welded together throughout this area, as shown in Fig. 6 «Instead as shown in 3 ° in fig. 7, one can have an additional 1 axis 26 extending substantially from the opening 18 of the pouch part to the stiffening strip 17, 171 and close to the longitudinal edge of the intermediate layer A second variant to account for simple bending and closing of the tobacco pouch is shown in Fig. 8, with a vertical incision 23 drawn just outside the opening 18 of the pouch section through the weld 9 and the outer and inner layer 6,7 up to the intermediate layer 6 · This incision is bounded by welding lines 24, 29. A variant of this embodiment is shown in FIG. 9, with a rectangular piece 8005940 · 9 · punched out. is that is delimited by the welding line 9, the intermediate layer 8, the opening 18 of the boiling part and the end edge. This piece is delimited by welding lines 28, 29 in order to keep the layers 6, 7 together. 5 is manufactured in the following manner

The inner plastic web 7 * and an outer web 6 * and a number of pre-folding of the bottom only in the transverse direction may be provided with a folding rail double paper blank ^ 8 * in a manner known per se ( rollers (not shown) lined to form a layered construction and joined bit occurs after either on the inwardly facing side of the sheet of paper, or on the inwardly facing side of the outer plastic web, the desired text and the desired colors are printed · Sveneens is previously on ** 5 the one strip 7 'on the surface facing away from the intermediate layer at a distance from the centerline of the strip corresponding to the distance from the end edge 16 to the edge 18 of the opening of the pouch elf a strip 19 * of a preferably heat-reactivable glue of the above-mentioned type of stiffening strips 20 17 * with double thickness, and optionally the sheets of paper 8, have also been previously treated in such a way that they can be welded to each other with respect to the plastic webs 7 * »6 *, and the sheets of paper are cut in length with a width corresponding to the greatest width of the box-shaped pouch in the filled state. double sheets are held by the stiffening strips 171 and inserted between the plastic webs so that the end edges thereof run parallel to the side walls of the plastic webs and so that they are spaced in the conveying direction of the plastic webs. formed pouch half-finished products are cut in a manner known per se (not shown) partly in conveying direction along the centerlines of the webs, and partly along the line perpendicular to the conveying direction, such that along both long sides of each intermediate sheet wide pieces of plastic are present 33 to form both halves One of the two side walls of the pouch part plus the weld seam in the side wall »Immediately after the webs have been sent into the rollers, the narrow end edges of the sheet are possibly attached to the plastic webs» Then the inner edge of the pouch is cut clean and the pouch folded · 4 ° · After folding, the plastic layers and the adhesives »q η ncn /. λ • 10 »strips of their width and their long perforated edge of the web of paper perforated · Finally the sides are welded together for the final shape of the tobacco pouch and the valve and all outer edges are cleaned cleanly · 5 Instead of a previous one treated sheet paper can also be used untreated sheets of paper, which are attached to the top of the stiffening strip and / or are held by the plastic webs. · A further advantage of the tobacco pouch so manufactured is that its shape is easier than with similar known tobacco pouch wraps around the tobacco with paper along the side walls, and for the same reason that it also passes through the packaging machine more easily and unimpeded · 9th transverse stiffening strip 17 on top of the closing flap 3 stabilizes the pouch during its passage through the packaging machine and prevents the pouch from ver »15 curled edge captures · Terder guarantees the stiffening strip that the vo rm of the closing valve is maintained during use.

-Conclusions- 8 0 o 5 9 4 0

Claims (6)

1. Tobacco pouch with an inwardly turned bottom fold, a closing flap and a substantially box-shaped pouch * part when filled, the whole pouch being made of a number of web-like material layers, the outer and inner layers of which are plastic foil , and wherein the middle is an intermediate layer which preferably has a stiffening action, and where either the inside of the outer layer or the outside of the intermediate layer is provided with a printed color marking, and the superimposed material layers mutually folded inwards and welded along the side walls for the loxoxing of the front wall and back wall of the pouch with an extension for the formation of the closing flap, characterized by the fact that the intermediate layer (8) has a width (b) corresponding to the greatest width (3 ) of the filled box-shaped pouch * part (4) and is arranged between the super cool layers (6,7) in such a way that 13th side walls have the same distance from the side edges (14) of the plastic webs, with the distance corresponding to half the thickness (1/2 t) of the box-filled pouch section plus the width (β) of the side welds (9), and that the intermediate layer (8) is attached to at least one of the transverse end * 20 edges (15 »16) of the pouch (1) either on the outer or inner plastic layer (6,7) or on the one plastic layer, preferably the inner plastic layer (7), and a stiffening strip arranged over the entire width thereof on the free end edge (16) of the pouch, the second side of which is attached to the side of the 23 plastic layer or layers on both sides, and that a x-activated baxe adhesive has been applied to the end edge (13) or opposite the opening (18) of the pouch part in the form of a transverse »the strip (19 *) · Tobacco pouch according to claim 1, characterized in that on the inner plastic layer (7) either on the side facing the interior of the pouch part (4) or on the side facing the intermediate layer (8) the end edge (16) of the closing flap (3) is a stiffening strip (17, 17 *) attached of suitable material that extends over the entire width of the plastic layers (6,7) 35 »ö η nrga λ -12 - 3o Tobacco pouch according to claim 1 or 2, characterized in that the material of both the housing layer (6) and the inner layer (7) is chosen from the polyolefins and consists of webs or of polypropylene covered with a layer oopoly-5 more either a laminate consisting of polyethylene and a layer of copolymer coated with polypropylene, or a laminate consisting of polyester and either polyethylene or a layer of polypropylene coated with copolymer. Tobacco pouch according to claim 1, 2 or J, with the characteristic that the intermediate layer (8) is a sheet of paper with a weight of more than 60 g / m2, preferably between 80 and 100g / m2 · 3 »Tobacco pouch according to claim 4» * θ characterized in that the layer of paper has a weight of approximately 300 up to 2. about 500 g / m 2, preferably about 400 g / m 2 60 Tobacco pouch according to any one of the preceding claims, characterized in that the intermediate layer (8) and the outer and inner plastic layers (6,7) at least along one of the end edges (15 »16) running in direction of rotation are fastened together · Tobacco pouch according to any one of claims 1-5, characterized in that the inner layer (6), which is a laminate, covers the entire length and width is metallized, and that the outer layer is optionally made opaque at least along the edge parts (19 *) outside the intermediate layer (8) either by metalizing or by coloring * Tobacco pouch according to one of the preceding claims, characterized in that the adhesive strip (17) is a strip of paper provided on both sides there are various welding media such as polyolefins, the side facing the inner plastic layer (7) is preferably provided with a layer of low density polyethylene and welded to this plastic layer, while the second side is provided with a layer of polyethylene of high density or of an agent which glues to the intermediate layer (8) Tobacco pouch according to any one of the preceding claims, 33, characterized in that the web-shaped material carriage (6,7,8) at the opening (18) of the pouch part (4) is un-bent to form an interior facing the pouch folded edge strip and that the glue strip (I9f) is applied to 8005940 -13- the outer web-shaped plastic layer »10 · tobacco pouch according to any one of claims 1-89, characterized in that the glue strip (19) is applied to the inner web-shaped layer (7 Tobacco pouch according to claim 10, characterized in that an area between the adhesive strip (19) and the cutting edge is a handle fold of ciroa 3 "12" tobacco pouch according to claim 1 and one of claims 9 ® f 10 and / or (11), set characterized in that a heat-reactivable glue is used of the kind which guarantees an easy-to-open, tight seal by cooling to a normal temperature, the glue preferably being selected from the Nhot melt "li and preferably consists of ethylene-vinyl acetate copolymer, wax and synthetic resins, and has a certain viscosity in the range between about 400 and about 3000 cF at 15 ° C and preferably between about 1800 and 2300 cF, the adhesive layer preferably has a thickness between 1 and 4 μη »preferably between 2 and 3 μη» 13 · tobacco pouch according to any one of the preceding claims, 2? characterized in that the pouch is perforated in the width of the signaling strip (I7f) and immediately outside and along the longitudinal edges of the intermediate layer (8) tobacco pouch according to any one of the preceding claims and wherein the weld along the side edges is a welded seam, characterized in that the outer layer (6) and inner layer (7) in the area (9 *) which is substantially delimited by the longitudinal edge of the intermediate layer (8), the opening (18) of the pouch part, the end edge (16) of the back wall (11) of the pouch and the longitudinal common edge of the layers, welded together 3 ° throughout this area (9 *) »13 · tobacco pouch according to any one of the preceding claims, and wherein the weld along the side edges is a welded seam, characterized in that another weld line (26) is present extending substantially from the opening (18) of the pouch part to the marking strip 07 ». 17 *) and close to the longitudinal edge of the intermediate layer (8) runs »16» tobacco pouch according to any one of the preceding claims, 8005940 -Ηθη wherein the weld along the side edges is a weld seam, characterized in that a vertical cut (23) is provided just outside the opening (18 ) from the baid part through the welding line (9) and the outer and inner layer (6,7) to the intermediate layer (8), and 5 whereby this incision is limited to the welding lines (24f25) Tobacco pouch according to Mn of the preceding claims, and wherein the weld along the side edges is a welded seam, characterized in that a rectangular area is punched out which is bounded by the welding line (9), the intermediate layer (8), a line plane outside the opening (18) of the baid part and the end edge (16), this area for holding the layers (6,7) together is bounded by welding lines (28, 29), Method for the manufacture of a tobacco pouch with an inwardly turned bottom fold, a closing flap and a filled box-shaped baid part, and an inner and an outer plastic web and a number for folding the bottoms only in the transverse direction any roughened interleaves are passed over rollers so that they are cabinated to form a layered artificial skirt after either the finished side of the interleaf in finished condition or the inwardly facing side of the outer plastic web text and the desired colors are printed, characterized in that a strip on the inner or outer web on the side facing away from the interleaf for joining and layer the outer boards or at a certain distance from the centerline of the webs is applied from a glue which can preferably be reactivated by heat, so that the blanks of the intermediate material present as stiffening el, preferably consisting of paper which has been either untreated or treated for welding to the plastic bases and / or a adhesive strip, previously in the direction of transport of the webs to a width which is always the greatest width of the filled condition box-shaped belt part have been cut and fed between the plastic webs such that their end edges run parallel to the sides of the plastic bases and in the 33 conveying direction of the webs with mutual distances, and that the pouch articles are cut along a line perpendicular to the conveying direction that along the two long sides of each interleaf there are sufficiently wide pieces of plastic present to form half of each side wall of the baidel part plus the side welding seam and that immediately after insertion the narrow end edges of a yel are joined together with the plastic strips * on which the pouch is folded, with any transverse grooves a bottom fold is formed * after which the side edges for the final shaping of the tobacco pouch and the flap are joined together and all outer edges were cut clean Method according to claim 13 * characterized in that it further comprises the step that after folding but before welding the side edges to the inner web and to the end edge 10 furthest from the bottom fold is also applied a tack sheet * which may consist of a paper strip coated on both sides with a layer of polyethylene Method according to claim 18 *, characterized in that at the same time as inserting double blanks * for the insert and layer the line which must form the free end edge of the pouch *, a vex stiffening strip of double width *, preferably a strip, is introduced paper * which is provided on both sides with layers of different 1 axis media for holding the possibly untreated intermediate layers and welding them to the plastic webs, that the double pouch semis are divided along the center line of the webs and that the inner edge of the pouch after welding of the end ribs and before the folding is cut cleanly. The method according to claim 20, characterized in that in the free end edge of the pouch the width of the 25-inch stiffening strip and immediately outside the longitudinal outer edges of the intermediate layer is perforated to ensure correct bending in the packaging machine · 8 0 0 5 9 4 0