EP1845029B1 - Hose-shaped bag - Google Patents

Abstract

A tubular flexible container, e.g. for holding milk or other fluids, has a flexible central section made of plastic sheet (14) seam welded into a tube via lap seal (15, 16,) or fin seal, and fitted with a more rigid base (12) and a more rigid top (17), secured by weld seals. The top is fitted with a closure (11) also of rigid plastic. The empty containers can be stored in a compacted state.

Description

The invention relates to a tubular bag according to the preamble of claim 1.

Tubular, in particular sealed, bags are well known. They are mainly used to hold liquid or flowable products. They are comfortable and practical to handle. The products can be removed from it by a simple pressure on the sealed bag, provided that it has an opening. Unless such an opening is provided, these sealed bags usually have a zipper. With regard to their packaging weight, they have the advantage over solid packaging, such as cans or bottles, that they have a very low dead weight / fill weight ratio.

A bag of the type mentioned is known for example from the AT 293 944 , There it is assumed that containers are formed in the form of a hose tube, wherein the tube piece forming the tube is completed by extending at both ends of the tube obliquely to the longitudinal direction welds, wherein one of these welds forms a tip on which a provided with a screw neck portion of a Lock is inserted and connected by welding with the hose piece.

The known construction has no measures for stabilizing the tubular portion between the lid and bottom.

Accordingly, the present invention has for its object to provide a tubular bag, which is characterized by an over the prior art increased dimensional stability.

This object is achieved in that the tubular part of the bag is plastically deformed within a mold, in particular inflated to form a permanent, e.g. barrel-like, spherical od. Like. Contour and / or relief-like surface structure.

Corresponding specifications for the stabilization of a tubular bag can also be the further prior art, such as DE 202 12 251 U1 . DE 202 14 197 U1 . JP 2002/104446 A and DE 17 23 470 U , do not remove.

With regard to advantageous developments and embodiments of the bag according to the invention, reference is made to the subclaims, it being very generally stated that the rigidity or stability of the bag according to the invention is additionally increased by corresponding lid and bottom constructions. Preferably, the lid is relatively stiff, and has a circular, oval or even rectangular peripheral contour, through which the bag then receives its base contour. Furthermore, the relatively rigid lid preferably includes a cap closure. Due to the rigidity of the lid is then avoided that the formation of the cap closure as a screw when opening or closing the same twisted tubular part of the bag and thus damaged, such a twist counteracts the structure of the tubular part of the bag according to the invention in addition.

To screw or screw on the screw, it is only necessary to hold the tubular bag in the region of the peripheral edge of the lid between the thumb and forefinger of one hand, then to open or close the screw cap. This prevents any harmful effect on the flexible part of the container or bag according to the invention.

Preferably, the standing floor consists of a relatively rigid part, for example a disk with a raised peripheral edge, which is for connection to the tubular Part of the bag inserted into this and along the bottom circumferential edge welded or sealed with this. Alternatively, the standing floor can also be made of a flexible disk with a raised peripheral edge. It is a preformed flat pot made of the same material as the tubular part of the bag.

Finally, there is the possibility to produce the floor from a V- or W-shaped folded foil blank, the latter by means of a retractable sword from below into the bag insertable and with the lower edge of the bag to form an approximately U-shaped weld or seal is welded or sealed.

If the bottom is made of a relatively rigid member, the bag according to the invention as a whole, i. It is suitable as a replacement for conventional bottles or cans, which are lately burdened with pledges in some countries in connection with the relatively rigid lid.

As already mentioned above, a film material is used for producing the tubular part of the bag, which is plastically deformable according to the invention, in particular within a blow mold to form a permanent, for example barrel-like, spherical od. Like. Contour. It is also conceivable to permanently impress a relief-like surface structure in the tubular part of the bag.

To ensure a permanently high tightness between the lid and possibly bottom on the one hand and tubular part of the bag on the other hand, has the lid (and possibly also bottom) at least one peripheral notch or dents into which the film blank connected to a tube during welding or sealing with the lid and / or bottom by an associated tool can be pulled, so that the respective associated peripheral edge of the tubular part of the Beutels over the entire circumference of the lid and possibly the bottom closely adjacent to this. Alternatively, a kind of shrink seal along the lid and bottom circumference is conceivable. It is also conceivable to wrap the foil blank under tension around the lid and the bottom in order to then produce the abovementioned "lap-seal" seam while maintaining the tension.

Because the bag according to the invention is produced from a one-piece foil blank, the production of the bags according to the invention can take place "from the roll". The individual blanks only have to be separated from a corresponding film web and lid and bottom assigned.

To increase the welding or sealing efficiency of the lid has a raised peripheral edge with at least two, in particular three spaced apart axially spaced circumferential ribs, with which the associated edge of the tubular part of the bag is welded or sealed. In the same way, the standing floor can be formed and welded.

The previous lack of poor fillability of the tubular bag mentioned in the introduction is achieved by a tubular film bag, in particular stand-up pouch, with a sealed in the region of a top seal and a possibly bottom, the bag on both sides in the head area diametrically to the bag longitudinal axis, ie along its longitudinal edges, in particular Longitudinal sealing seams, drawn to form at least one W-fold (gusset) inward, ie is wound.

Due to the gusset, the width extension of the tubular film bag in the head area is lower than in the case of conventional stand-up bags. The bag may, however, due to the gusset, which has the shape of a W-fold, when filled at a right angle to the bag longitudinal axis and the bag width, ie in the z-direction spread. This is made possible by the fact that the lateral bag outer edges in the head area of the bag on both Sides are initially drawn inwards towards the closure part. When filling this indentation can unfold in the z-direction.

According to one embodiment of the invention, the W-fold, i. the gusset, fixed in the area of the top seam by a mutual seal. Here are four layers of film in the form of a folded W together so that a indentation defining V-fold, which forms the middle part of the W, between the outer edges of the W forming films is sealed so that an outward slippage of the feeder , namely the V's, is not possible. Therefore, the stand-up bag does not expand in its width direction, which is held together due to the top seam, but in the z-direction. Thus, the cross section of the bag is optimized in the head area to form a z-direction increased usable inner bag volume.

According to this embodiment, the film tube bag in the filled state forms an approximately can-shaped form, which has improved stability over conventional bags, since upper portions of the bag no longer protrude beyond the bottom of the stand and could lead to an imbalance. In addition, this bag shape is attractive due to its symmetry and produces an aesthetic effect.

According to a further embodiment of the invention, a flat fitting with a closure piece is sealed between the gussets and the top seam. Depending on the embodiment of the fitting, the gussets may extend as far as this.

By the gusset, the top seam is reinforced in the head area, namely instead of two-ply now four-ply. By this gain, the holder of a fitting is optimized. In addition, it is due to the reinforcement of the top seam easier to open a closure, in particular rotary closure than conventional film tubular bags, because due to the gain on the entire head area to the counter support when turning the rotary closure can be used, so that not only the flat fitting as Must serve.

According to a further embodiment of the invention, the fitting is circular, oval or pointed oval. The respective embodiment depends here on aesthetic aspects and can emphasize, for example, a design or a motif which is mounted on the stand-up bag, in an advantageous manner, so that its aesthetic shape is further optimized over conventional stand-up pouches.

According to an advantageous embodiment, it is provided that the film tube bag is provided on both sides with a double W-fold. In this embodiment, there are two V-shaped indentations per longitudinal side on the film tube bag. These four V-shaped indentations are arranged in an encompassing arrangement around the flat fitting. In this way, it is possible to give the film tube bag, in particular stand-up pouch, by a profiling of its longitudinal sides, in particular in the head area, an additional stability and thereby to prevent the risk of kinking.

According to a further embodiment, the V-shaped indentations may be arranged asymmetrically on the two longitudinal sides of the tubular film bag. One possible realization is, for example, that there is only one gusset on one longitudinal side of the film tubular bag and two times gusset on the diametrically opposite longitudinal side of the film tubular bag. In this way, for example, in the filled state approximately triangular shape of the film tube bag in the head area is possible.

According to a further embodiment of the invention, the film tube bag is closed on the bottom side either by a bottom seam or a separate sealed bottom. Such a bottom seam could be formed, for example, in the form of a W-fold, whose outer longitudinal edge parallel to the bag outer edges are sealed so that in the filled state forms a W whose center fold is pulled apart during the filling, so that a Standoval or a Forming a circle. This embodiment is particularly advantageous because the tubular film bag is advantageously made from a single foil blank, which is possible in this floor design. The bottom portion is four-ply at the side edges in this embodiment sealed. Above the bottom area, the four-ply sealer merges into a two-ply seal.

The above embodiment is particularly suitable for a fin-seal bag having side sealing seams.

According to a further embodiment which is particularly suitable for a lap-seal bag which does not have side seams, the sealing of a separate bottom into the tubular bag offers itself. Such a sealing of a floor offers the advantage that the tubular bag can not be filled on the head side, but on the bottom side. Since the bottom-side opening is usually larger than the head-side opening, a bottom-side filling can be done faster.

In addition, a lap-seal bag is particularly well suited for the formation of an inventively inventively folded in the head area W-fold, since a lap-seal bag is flexible and easy to contract in its lateral edge regions to a W-fold.

In summary, it can be stated that the novel stand-up pouch form according to the invention, in addition to an optically optimized design, creates an additional volume in the upper pouch area which allows a higher filling of the pouch.

The stability of the tubular bag according to the invention is achieved by a tubular bag with bottom, wherein the bottom is made of a rectangular, in particular square foil blank before introduction into the tubular part of the sealed bag in such a way that the foil blank is folded over and then sealed along the then narrow side superimposed edges ,

An essential point of the invention is that a substantially rectangular-shaped, in particular square, or with respect to its side edges in Umfaltbereich slightly retracted foil blank is used to form a floor for the tubular bag seal. Such a film blank can be made of the same material, in particular the same film web, as the sealed bag itself. Due to the size of the rectangular foil blank and across the width of Sealing edges, which are provided in the tubular part of the sealed bag and on the foil blank, the size of the footprint and the stability of the bag is defined. This happens as follows:

It is used a film blank, which corresponds in width to the width of the later desired level of the sealed bag plus a border area for a sealing surface of the soil. The depth, i. The z-direction of the stand results from the length of the film blank. The film blank is folded in the middle parallel to its width extension, so that from the longitudinal edges of the film blank now narrow sides superimposed edges of the folded film blank arise. These narrow sides superimposed edges are sealed so that a pocket is formed, the outer edges of which have a.Fin-Seal seal.

According to a preferred embodiment of the invention, the foil blank is sealed in such a way that it slightly tapers in the direction of insertion into the tubular part of the sealing bag. In this way, the bottom is very easy to insert into the film tube.

By turning the floor results in the pocket a smooth outer edge, which adapts optimally to the round tubular part of the sealed bag.

The bag is sealed into the tubular part of the sealed bag via a sealing edge, which runs around the bottom at the bottom. Over the width of this edge, the stability of the soil and the stability of the bag can be determined. Thus, a wider edge provides greater stability and, in addition, in the case of a filled bag, provides security against folding the floor back outwards.

A sealing medium is used for the sealing. Such a sealing medium is preferably a sealing film, which is used as the inner layer of the soil, and the pressure and / or temperature application in the applied areas against itself, or, in a reversed state, seals against a corresponding inner sealing film in the tubular part of the sealed bag , However, other sealing materials and adhesives come into question.

The bag made from the film blank is now turned over so that the initially inner sealing medium is now outside. It should be noted that the sealing medium is provided at least along the edges of the original foil blank.

This everted pocket is now inserted according to an embodiment of the invention in the tubular part of the sealed bag and sealed with its peripheral edge, so that a tubular stand-up pouch is formed, wherein the narrow-side sealing edges of the bottom are located within the pouch. The main advantage that results from the fact that a floor is made separately from a foil blank, is that in this way exactly the size and the shape of the floor can be specified. It is possible in this way to specify exactly both the width extension and the extent of the bottom in the z direction, wherein only the circumference of the tubular bag must be taken into account. It is readily possible to provide a circular floor, which virtually eliminates the risk of falling over a bag of the invention.

According to a further embodiment of the invention, it is not absolutely necessary to evert the prefabricated pocket from a foil blank, since its fin-seal edges can be folded aside at any time, so that the prefabricated bottom is inserted into the tubular part of the sealed bag and with its peripheral edges can be sealed. The insertion in both cases is such that the pocket made from the film blank is inserted into the tubular part of the sealed bag such that the opening of the pocket is accessible from the outside even after the bag has been sealed in the tubular part of the sealed bag, i. that the inside of the bag provides the footprint of a filled sealed bag.

According to the invention, the tubular sealing bag is produced from a foil blank sealed along a side seam, wherein the longitudinal sealing seam is designed as a lap seal or as a fin seal. Thus, the bottom made of the film blank can be used for all tubular bag seal. Tubular sealed bags with a bottom according to the invention have an im Result in a substantially circular bottom, which is hermetically sealed due to its sealing with the tubular part of the sealed bag.

Fig. 1

einen Schlauchbeutel mit erfindungsgemäßen Aspekten in perspek- tivischer Ansicht;

Fig. 1 a

eine alternative Bodenkonstruktion des Beutels gemäß Figur 1 in perspektivischer Ansicht;

Fig. 1b

eine weitere alternative Ausführungsform der Bodenkonstruktion des Schlauchbeutels gemäß Figur 1 in perspektivischer Ansicht;

Fig. 1c und 1d

eine dritte Alternative der Bodenkonstruktion des Schlauchbeutels gemäß Figur 1 in perspektivischer Ansicht sowie in Seitenansicht;

Fig. 2

einen erfindungsgemäßen Beutel in perspektivischer Ansicht;

Fig. 3

eine schematische Darstellung einer weiteren Ausführungsform eines Folienschlauchbeutels mit erfindungsgemäßen Aspekten;

Fig. 4

eine schematische Darstellung eines Folienzuschnitts zur Herstellung eines weiteren alternativen erfindungsgemäßen Standbodens;

Fig. 5

eine gefaltete Ausführungsform des Folienzuschnitts aus Fig. 4;

Fig. 6

eine vollständig gefaltete und randversiegelte Ausführungsform des Folienzuschnitts aus den Figuren 4 und 5; und

Fig. 7

eine schematische Darstellung des Einsatzes des erfindungsgemäßen Standbodens in einen schlauchförmigen Siegelbeutel.

Hereinafter, embodiments of the bag according to the invention will be explained in more detail with reference to the accompanying drawings. Show it:

Fig. 1

a tubular bag with aspects of the invention in perspective view;

Fig. 1 a

an alternative bottom construction of the bag according to FIG. 1 in perspective view;

Fig. 1b

a further alternative embodiment of the bottom construction of the tubular bag according to FIG. 1 in perspective view;

Fig. 1c and 1d

a third alternative of the bottom construction of the tubular bag according to FIG. 1 in perspective and in side view;

Fig. 2

a bag according to the invention in a perspective view;

Fig. 3

a schematic representation of another embodiment of a film tube bag with aspects of the invention;

Fig. 4

a schematic representation of a film blank for producing a further alternative floor according to the invention;

Fig. 5

a folded embodiment of the film blank from Fig. 4 ;

Fig. 6

a completely folded and edge-sealed embodiment of the film blank from the FIGS. 4 and 5 ; and

Fig. 7

a schematic representation of the use of the floor according to the invention in a tubular sealed bag.

The in FIG. 1 schematically illustrated tubular bag 10 has a cap closure 11 and is used to hold Pasteusen or liquid food, for example milk, lemonade, mineral water od. The like .. The bottom 12 is formed as a standing floor and in particular as a separate component along the bottom side bag edge with this fluid-tight welded or sealed. The corresponding sealing edge 13 is in FIG. 1 shown in dashed lines. The tubular part 14 of the bag 10 is made of a one-piece film, in particular composite film blank (rectangular blank). The longitudinal edges 15, 16 are sealed to form a so-called "lap-seal". It is a so-called. Inner / outer sealing without the formation of a radially outwardly protruding sealing edge. This results in a largely smooth surface over the circumference of the tubular part 14 of the bag 10.

The cap closure 11 is part of a relatively stiff lid 17, which is fluid-tightly welded or sealed to the upper or closure-side bag edge.

The standing floor 12 can accordingly FIG. 1 consist of a relatively rigid disc 18 with raised peripheral edge 19. The bottom 12 thus forms a kind of flat pot, with the upstanding peripheral edge either ahead or subsequently (as in FIG. 1 shown) is inserted into the tubular part 14 of the bag 10 and then welded or sealed to the inside of the associated peripheral edge of the tubular part 14.

Alternatively, accordingly FIG. 1a the bottom consists of a flexible disc 20, which is circumferentially welded or sealed with an outwardly shaped peripheral edge 21 of the tubular part 14 of the bag 10. Also in this embodiment, a high stability of the bag 10 is obtained, in the manner of a bottle od. Like ..

According to the Figures 1c, 1d the standing floor may alternatively be made of a V-shaped or W-shaped folded foil blank 22, this foil blank then preferably by means of a retractable from below (arrow 23 in FIG Figure 1d ) Sword insertable into the bag interior and with the lower edge of the bag to form an approximately U-shaped weld or seal seam 24 is welded or sealed. The sealing seam 24 is preferably formed such that the sealing line extends in the region of the outermost peripheral edge 32 on the bottom side. In this embodiment, the bottom 12 after filling the bag 10 can spread relatively smoothly almost flat. The V-resp. W-shaped prefolded bottom panel is pre-sealed prior to insertion into the tubular portion 14 of the bag 10 in this embodiment. Alternatively, of course, a sealing of the bottom after insertion of the blank in the tubular part 14 of the bag 10 is conceivable. The inwardly facing longitudinal edge of the V- or W-shaped folded film blank 22 is in the Figures 1c, 1d designated by the reference numeral 25.

As FIG. 1 with respect to the lid 17 and FIG. 1b With respect to the standing floor 12 can be seen very well, the lid 17 and the standing floor 12, if it is made of a relatively stiff material, in each case at least one peripheral notch or - dent 26, in which the connected to a tube foil blank in the Welding or sealing with the lid and possibly floor by an associated and here not shown in detail tool can be pulled, so that the respective associated peripheral edge of the tubular part 14 of the bag 10 over the entire circumference of the lid 17 and bottom 12 fits tightly against this ,

Corresponding FIG. 1 the lid 17 has a raised peripheral edge 28, which in the assembled state accordingly FIG. 1 protrudes into the bag interior. This peripheral edge is provided with at least two, here three axially spaced circumferential ribs 29, with which the associated edge of the tubular portion 14 of the bag 10 is welded or sealed. In the same way, the peripheral edge 30 of the standing floor 12 according to FIG. 1b be provided with circumferential ribs. These circumferential ribs are in FIG. 1b only indicated by drawing.

As already mentioned, the cap closure preferably comprises a screw cap. However, it is also conceivable od a plug cap. Like. To use as a closure.

In FIG. 2 an alternative embodiment of a tubular bag 10 is shown, wherein the tubular portion or part 14 within a corresponding Shape, in particular blow mold, "bulged" radially outward. It is preferably a lime deformation of the film used for the tubular part 14. Of course, any other contour, in particular rotationally symmetrical contour of the tubular part 14 of the bag 10 is conceivable. This depends on the customer's request and the corresponding shape for the production of the desired contour.

To advantage of the bag described should be mentioned that this is primarily suitable for the intake of fruit juices with low CO ₂ content. The desire for drinks with little CO ₂ is getting stronger. Accordingly, it is of course no longer necessary to provide a container that can withstand the relatively high pressures that arise when bottling drinks with CO ₂ . On the other hand, in the present case material can be used which is very heat resistant. Thus, the bottled in the bag described foods can be easily pasteurized or heat treated for preservation. The filling preferably takes place via the lid. After filling the cap closure is placed, preferably in conjunction with a guarantee strip, as it is known in bottle closures.

FIG. 3 shows a schematic representation of a tubular film bag according to the invention. In the region of a top seam 35, a lateral region of the tubular film bag is pulled in diametrically to a longitudinal bag axis 33 on both sides of the bag 10, in the region of its edge (s), to form a W-fold 34. The W-fold 34 forms a gusset. Furthermore, a closure part 11 is arranged in the region of the top seam 35. The closure member 11 is located on a flat mold piece 36 which is sealed in the top seam.

In FIG. 3 It is also schematically illustrated that the tubular film bag according to the invention is suitable both for a fin-seal seam (left area) and for a seamless embodiment (right area). In the area of the fin-seal seam, the W-fold is sealed 6-ply (not shown), while the W-fold is sealed 4-ply in the area of the seamless feed.

According to the FIGS. 4 to 7 is a square foil blank 22 with a width of 11 cm at the edge in a region extending 5 mm from the edge inwards with a sealing film, which serves as a sealing medium provided. Following this, the foil blank 22 is folded centrally parallel to a width extension, so that the edge regions 38 provided with sealing foil come to rest on one another. The narrow-side edge regions 37 are sealed together so that the sealing foil is sealed here against itself. Then, the film blank 22, which now forms a pocket 40, turned inside out, so that the formed as fin-seal edges 42 narrow-sided sealing edges 37 come to lie inside in the pocket. Subsequently, this everted pocket 40, which now has a width of 10 cm, introduced into the tubular portion 14 of a sealed bag 10, which has a widthwise extension of 100.5 mm in unfilled flat shape, that is slightly wider than the everted bag 40 until the edges of the pocket are flush with the edges 32 of the tubular part 14 of the sealed bag 10. The sealing film attached to the film blank 30 is now in direct contact with the edge region 32 of the tubular part 14 of the sealed bag 10. A sealing takes place in such a way that the edge region 38 provided with the sealing film engages the bag 40 produced from the film blank 22 and turned inside out the edge region 32 of the tubular part 14 of the sealed bag 10 is sealed, so that when filling the sealed bag 10, a base 41 is formed.

After filling the sealed bag 10, the bottom 12 produced from the pocket 40 deforms in such a way that it forms a circular bottom 12 which hermetically seals off the tubular sealing bag 10.

As a result, a staked pouch with optimized state properties is obtained, which is simple and inexpensive to manufacture, which has the advantage that at any time a filling of the sealed bag on the bottom side is possible and which is small when folded without hard parts collapsible.

LIST OF REFERENCE NUMBERS

10

tubular bag

11

caps lock

12

(Free-standing) Floor

13

sealing edge

14

Tubular part

15

longitudinal edge

16

longitudinal edge

17

cover

18

disc

19

circumferential edge

20

flexible bottom plate

21

circumferential edge

22

(Film) blank

23

arrow

24

U-shaped sealed seam

25

edge

26

dent

27

dent

28

circumferential edge

29

circumferential ribs

30

circumferential edge

31

screw cap

32

bottom edge

33

bag longitudinal axis

34

W-fold

35

head seam

36

fitting

37

Edges (of the foil blank)

38

Edge area for sealing surface

39

central folding

40

bag

41

footprint

42

Fin-seal sealing

43

Inside of the bag

Claims (13)

1. A tubular bag (10) with a cap-type closure for receiving paste-like or liquid food products, e.g. milk or the like, the bottom of the bag being designed more specifically as a stand-up bottom (12) and is welded or sealed (13) fluid-tight as a separate component with and along the bottom edge of the bag, the tubular part (14) of the bag (10) being manufactured from a one-piece, substantially rectangular pre-cut foil, more specifically pre-cut laminate film, the long edges (15, 16) of which are sealed on top of each other by forming a so-called "lap seal" or are alternately designed as a "fin seal", and the cap-type closure (11) being a part of the relatively rigid cover (17) which is welded or sealed fluid-tight with the upper edge or the edge on the side of the closure of the bag, characterized in that the tubular part (14) of the bag (10) is plastically deformed inside a form, more specifically inflated to form a permanent, for instance barrel-type, spherical or such contour and/or relief-type surface structure.
2. The bag according to claim 1, characterized in that the stand-up bottom (12) consists of an either relatively rigid or flexible disc (18) with an elevated peripheral edge (29) or alternately of a pre-cut foil (22) folded in a V or W- shape, the latter being insertable into the inside of the bag by means of a sword that can be introduced from below (arrow 23) and weldable or sealable with the bottom edge of the bag by forming a weld or sealed seam (24) shaped for instance as a U.
3. The bag according to claim 1 or 2, characterized in that at least the cover (17), if necessary also the prefabricated stand-up bottom (12) provided it is manufactured from a relatively rigid material, has at least one peripheral notch or dent (26; 27) into which the pre-cut foil joined into a hose can be pulled by means of a corresponding tool while being welded or sealed with the cover and/or bottom, so that the respectively corresponding peripheral edge of the tubular part (14) of the bag (10) closely rests against the cover (17) and if necessary the bottom (12) along their entire edge.
4. The bag according to one of the claims 1 to 3, characterized in that the cover (7) has an elevated peripheral edge (28) with at least two peripheral ribs (29) disposed at an axial distance from each other, with which the corresponding edge of the tubular part (14) of the bag (10) can be welded or sealed.
5. The bag according to claims 1 or 4, characterized in that the bottom is formed by a relatively rigid, respectively stiff or alternately flexible disc (20), the peripheral edge of which is welded or sealed with a peripheral edge (21) of the tubular part (14) of the bag (10), which is deformed for instance radially outward on the bottom side.
6. The bag according to one of the claims 1 to 5, characterized in that the cap-type closure (11) comprises a screw cap (31).
7. The bag according to one of the afore-mentioned claims, characterized in that in the top area, on both sides, the bag (10) is pulled inward ("gusseted") diametrically relative to the longitudinal axis (33) of the bag, by forming at least one W-fold (34) ("gusset").
8. The bag according to claim 7, characterized in that the W-fold (34) (gusset) is fixed in the area of a head seam (35) by mutual sealing.
9. The bag according to one of the claims 7 or 8, characterized in that a cover (17) designed more specifically as a flat molded part (36) with a closable opening is sealed in between the gussets (34) and the head seam (35).
10. The bag according to claim 9, characterized in that the molded part (36) is configured in the shape of a circle, oval or pointed oval.
11. The bag according to claims 1 or 4, characterized in that it is closed on the bottom side by a bottom seam.
12. The bag according to one of the claims 2 to 4 or 6 to 11, characterized in that before being inserted into the tubular part (14) of the sealed bag (10), the bottom (12) is manufactured from a rectangular, more specifically a square pre-cut foil (22) in such a manner that the pre-cut foil (22) is folded and sealed along the edges (37) which overlap on the then narrow side.
13. The tubular sealed bag according to claim 12, characterized in that the pre-sealed bottom (12) is upended and inserted into the tubular part (14) of the sealed bag (10) and sealed with its peripheral or bottom edge (32), so that a tubular standing bag is formed, the sealed edges (37) of the bottom (12) on the narrow side being located inside the standing bag.

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