US20220267037A1

US20220267037A1 - Method and device for producing tubular bags which are filled with a mixture of liquid and solid filling material components

Info

Publication number: US20220267037A1
Application number: US17/602,597
Authority: US
Inventors: Gerhard Kuss
Original assignee: Rovema GmbH
Current assignee: Rovema GmbH
Priority date: 2019-04-10
Filing date: 2020-03-17
Publication date: 2022-08-25
Also published as: WO2020207719A1; DE102019111754A1; EP3953260A1; EP3953260C0; EP3953260B1

Abstract

The invention relates to a tubular bag machine and to a method for operating a tubular bag machine (01) for the continuous production of tubular bags (20), which are filled with a mixture of liquid and solid filling components (29, 30). A formatting device (18), by means of which the bag shape of the tubular bag (20) open at the top seal is formatted, is disposed below the wiper device (16), the formatting device (18) comprising at least two formatting elements (19), which are contacted on the outer side of the film tube (34) and are displaced between an open position and a formatting position. The horizontal distance between the formatting elements (19) is larger in the open position than in the formatting position. The formatting elements (19) are moved to the open position before and/or while filling the tubular bag (20) with filling material (29, 30). The formatting elements (19) are moved to the formatting position while and/or after filling the tubular bag (20) with filling material (29, 30) and before producing the top seam to remove air from the air bubble (32) in the top area of the tubular bag (20) via filling material components (29, 30).

Description

The invention relates to a method for operating a tubular bag machine for the continuous production of tubular bags, which are filled with a mixture of liquid and solid filling components, according to the preamble of both independent main claims.
From the state of the art, tubular bag machines for producing tubular bags are known for packing mixtures of liquid and solid filling components. These tubular bag machines comprise a biaxially driven transverse sealing device comprising two sealing jaws. These sealing jaws are displaced along a predetermined trajectory and can produce bottom transverse seams and top transverse seams on the previously formed film tube to seal the tubular bag from the top and the bottom.
In these machines, a compressing device, which comprises two compressing elements, is attached above the transverse sealing device. These compressing elements can be contacted on the outer side of the film tube. In addition, the two compressing elements can be displaced horizontally between a closed position and an open position. In the closed position, the two compressing elements compress the film tube so tightly that the film tube is compressed so as to be liquid-proof. As a result, it becomes possible to fill the film tube with the mixture of liquid and solid filling components before being transversely sealed, since the compressing elements prevent the filling material from flowing downward. Once the top seam of the preceding tubular bag has been applied below the compressing device and the bottom seam of the following tubular bug has been produced, the compressing device is moved to the open position and gravity causes the filling material to fall into the still open tubular bag.
Below the transverse sealing device of the generic tubular bag machine, a wiper device (stripper) is provided. This wiper device comprises two wiper elements, which are contacted on the outer side of the film tube and can be displaced horizontally between a wiper position and an open position. In the wiper position, the wiper elements abut against the outer side of the film tube and compress the two inner surfaces of the film tube against each other. If the wiper device is moved downward at a faster speed than the film tube, the solid filling components are wiped downward on the inner side of the film tube by the wiper elements. In this manner, the wiper device can remove solid filling components from the sealing area of the tubular bag on the inner side of the film web in order to enable sealing the film tube using the transverse sealing device without difficulty. When producing the tubular bags to be filled with a mixture of liquid and solid filling components, the problem in known machines consists in the still open tubular bags becoming strongly bulged in the area of the bottom seam after being filled with the filling components. If this bulged tubular bag is closed by applying a top seam using the transverse sealing device, a large amount of air is closed in in the area below the top seam. This air in the tubular bag has a negative effect on the storing properties of the tubular bag, since in particular oxidation processes of the filling material within the tubular bag are accelerated within the tubular bag due to the oxygen contained in the air. Moreover, the strong bulging of the tubular bag causes an inadvertent lengthening of the individual tubular bags between the bottom seam and the top seam, which leads to more film web having to be used and lower length of cycles when producing the tubular bags.
Starting from this state of the art, it is thus the object of the invention at hand to propose a new method for operating a tubular bag machine for the continuous production of tubular bags, which can be filled with a mixture of liquid and solid filling components, the air contained in the tubular bag being reduced, the required use of film web being reduced, and the maximum number of cycles for the production of tubular bags being increased. Furthermore, it is the object of the invention at hand to propose a tubular bag machine for executing the method according to the invention.
These objects are attained by a method and a tubular bag machine according to the teachings of both independent main claims.
Advantageous embodiments of the invention are the subject matter of the dependent claims.
The method according to the invention is based on the connection of a formatting device disposed below the wiper device. This formatting device is tasked with formatting the bag shape of the still open tubular bag, i.e., before the top seam has been applied. For this purpose, the formatting device comprises at least two formatting elements which are contacted on the outer side of the film tube. For this purpose, the formatting elements can be displaced between an open position and a formatting position. The horizontal distance between the formatting elements is larger in the open position than in the formatting position. When executing the method according to the invention, the formatting elements of the formatting device are in the open position before and/or while filling the tubular bag, i.e., when the tubular bag is still open but after the bottom seam has been applied. In this open position, the open tubular bag can become bulged to the side without difficulty as known, meaning the filling material can be added to the open tubular bag without difficulty. During and/or after filling the tubular bag with filling material and before producing the top seam, the formatting elements of the formatting device are moved to their formatting positions, i.e., being moved together horizontally. By moving the formatting elements together horizontally, the still open tubular bag is formatted in its form, i.e., its breadth is compressed. By compressing the still open tubular bag, the liquid column of the filling material rises in the tubular bag and pushes out air from the top area of the tubular bag. Once the formatting elements have reached their formatting position and consequently a specific amount of air has been pushed out of the tubular bag, the top seam can be applied to the tubular bag directly thereafter or after carrying out further method steps in order to close the bag in this manner. As a result, a significantly smaller portion of air or even no air is in the top area of the tubular bag owing to the formatting of the tubular bag using the formatting elements, meaning in particular the storage properties of the tubular bag packaging is significantly improved. Moreover, the length of the tubular bag, which is required for receiving the filling material volume, can be reduced and thus the number of cycles of the tubular bag machine can be increased for the production of the tubular bags.
In the continuously working tubular bag machine, the film tube is continuously pulled downward in the tubular bag machine. In order to be able to ideally carry out the formatting of the still open tubular bag despite the continuous downward pull of the film tube, it is particularly advantageous if the formatting elements of the formatting device contacted on the outer side of the tubular bag in the formatting position are moved vertically downward at the same vertical speed as the transverse sealing device just as the film tube is moved at the same speed. In this manner, an undesired relative movement between the formatting elements on the one hand and the film tube on the other hand is prevented.
To not impede the air from escaping the head area of the still open tubular bag, it is advantageous if the wiper device remains in the open position until the formatting device is moved entirely into the formatting position. Not until after the formatting position has been reached does the liquid level reach its highest level in the still open bag, meaning that no additional air can be pushed out of the open tubular bag via the formatting device. From this moment on, the wiper device is then closed and the process of wiping the solid filling components contacted on the inner side of the film material is commenced.
In order to be able to wipe the solid filling components contacted on the inner side of the film tube downward without difficulty, it is particularly advantageous if the wiper elements of the wiper device contacted on the outer side of the tubular bag in the wiper position are vertically displaced at a higher vertical speed than the tubular bag. The difference in speed brings about a relative movement between the wiper element and the film tube, through which the solid filling components clinging to the inner side of the film tube are wiped downward.
As soon as the formatting elements of the formatting device have been moved to the formatting position and have thus formatted the still open tubular bag in shape, a certain amount of residual air commonly remains above the filling material, as otherwise there would be a chance of solid or liquid filling components being caught in the sealing area between the inner sides of the filling tube. In order to press out as much residual air remaining in the open tubular bag as possible, it is advantageous if at least one air-permeable venting channel is formed between the inner surfaces of the tubular bag in the wiper position of the wiper device, air being able to escape the top area of the tubular bag via the venting channel. If the wiper elements of the wiper device in the wiping position are moved downward relative to the film tube with the corresponding relative movement, the solid filling components are wiped downward because of this on the one hand and at the same time the air closed in in the top area of the tubular bag is pressed outward. The air which has been pressed outward is guided outward between the inner surfaces of the tubular bag via the venting channel so that as a result, only very little or no residual air remains in the tubular bag.
Once the top area of the tubular bag has been mostly freed of air and, if applicable, only a minute residual air portion remains in the tubular bag, the top seam of the tubular bag is applied using the transverse sealing device, thus closing the tubular bag. With regard to the processing and packaging of filling material, which consists of a mixture of solid and liquid filling components, it is particularly advantageous if the compressing device forms two retaining zones in the closed position. In the lower retaining zone, the film tube is compressed as usual so as to be liquid-tight to prevent the liquid filling components from leaking past the compressing device positioned in the closed position. At the same time, a second, upper retaining zone is formed above the lower retaining zone, the film tube being compressed so tightly in the upper retaining zone while maintaining a liquid-permeable residual gap that solid filling components cannot pass the residual gap. The result of the two superjacent retaining zones of the compressing device therefore is that first, the solid filling components are retained in the upper retaining zone, while the upper retaining zone allows the liquid filling components to pass through the residual gap. These liquid filling components are then retained in the lower retaining zone. By opening the compressing device, both retaining zones are opened and gravity allows the liquid and solid filling component to slide downward into the open tubular bag.
The tubular bag machine according to the invention is characterized in that the formatting device, by means of which the still open tubular bag can be formatted in shape, is provided below the transverse sealing device.
In order to be able to variably adjust the tubular bag machine to the dimensions of the bulge when packaging different filling materials, it is advantageous if the horizontal distance between the formatting elements in the open position and/or the horizontal distance between the formatting elements in the formatting position is adjustable. By adjusting the respective distances, a reaction to the bulging of the open tubular bag after having been filled with filling material and to the respectively required kinematics for pressing out air from the top area of the tubular bag can be varied. It is generally arbitrary in which constructive design the formatting elements of the formatting device are realized. According to a preferred design, it is intended for the formatting elements to each comprise several rotatably mounted rolls, which are disposed parallel and subjacent to one another. Hence, the rotatable subjacent rolls form a wall, off of which the outer side of the tubular bag can roll. Both walls formed by the rolls of the two formatting elements can then be moved toward or away from each other. In this manner, the rolls of the two formatting elements together form a formatting chute which is adjustable in breadth and in which the open tubular bags can be compressed to be formatted in form. After the transverse sealing and severing of the tubular bags, they can slide downward out of the formatting chute essentially without resistance owing to the rotatable rolls. In order to be able to easily enable synchronicity between the formatting device and the transverse sealing device in vertical operation, it is advantageous if the formatting device and the transverse sealing device are vertically driven using a shared drive device.
In order to easily form a venting channel between the wiper elements of the wiper device when in the wiping position, it is advantageous if the wiper elements of the wiper device are resiliently mounted on the transverse sealing jaws. If the wiper elements are in their wiping position and compress the inner sides of the film web against each other and if the wiper device acts downward relative to the film tube, the filling volume enclosed in the tubular bag is simultaneously reduced so that the pressure of the residual air in the top area of the tubular bag rises accordingly. If this pressure of the residual air in the top area of the tubular bag exceeds a specific degree, the resiliently mounted wiper elements are slightly pressed away from each other, thus forming an air-permeable venting channel between the inner surfaces of the tubular bag. Owing to this venting channel, the air from the top area of the tubular can escape outward.
In order to easily form two superjacent compressing zones in the compressing device, it is advantageous if the compressing device comprises two pairs of superjacent compressing elements, for example compressing rolls. The distance of the two lower compressing elements is smaller in this instance, so that the two lower superjacent compressing elements, which are disposed as a pair, compress the film tube so as to be liquid-tight in the closed position of the compressing device. The two upper compressing elements, which are disposed as a pair, have a larger distance so that a liquid-permeable residual gap remains in the upper pressure zone in the closed position of the compressing device. The breadth of the gap in the upper pressure zone is chosen such that the solid filling components cannot pass the upper pressure zone.
Which design of compressing elements is used for forming the compressing device is generally arbitrary. It is particularly advantageous if the compressing elements are realized in the manner of compressing rolls, since the compressing rolls can roll off of the film tube and enable the relative movement between the compressing element and the film tube without difficulty in this manner.
With regard to a conveying resistance of the film tube, which is as small as possible, via the compressing device, it is advantageous if the compressing rolls can be driven by motor.

An embodiment of the invention is schematically illustrated in the drawings and is described in the following by means of an example.

FIG. 1 shows a side view of a schematically illustrated tubular bag machine having a formatting device;

FIG. 2 shows a perspective side view of the tubular bag machine according to FIG. 1;

FIG. 3 shows an enlarged side view of the tubular bag machine according to FIG. 1;

FIG. 4 shows a side view of the tubular bag machine according to FIG. 1 in three different process stages;

FIG. 5 shows a side view of the movement curve of the transverse sealing jaw and the wiper device of the tubular bag machine according to FIG. 1;

FIG. 6 shows an enlarged side view of the transverse sealing jaws and the wiper device of the tubular bag machine according to FIG. 1.

FIG. 1 shows a side view of a tubular bag machine 01 according to the teachings of the invention for executing the method according to the invention. From a supply role 02, a film web 03 is unspooled and formed to a film tube at a forming device 04. The film tube is sealed at the longitudinal seam using a longitudinal sealing device 05. A film dispenser device 06 ensures the continuous supply of the longitudinally sealed film tube. The film tube is guided over a tube-shaped filling tube 07 after having been formed at forming device 04, the inner side of the film tube gliding off of the outer side of filling tube 07. At the lower end of filling tube 07, a spreader element 08 is fastened which laterally spreads the film tube having an initially circular cross section. Via Filling tube 07, liquid and solid filling material, such as a mixture of kraut and brine or vegetables and brine, can be supplied from above. For this purpose, the filling material can be collected in the film tube above a compressing device 09. The maximal and minimal filling level of the filling material in the film tube can be measured and/or controlled using two level sensors 10 and 11. Below compressing device 09, a transverse sealing device 12 having two transverse sealing jaws 13 and 14 is located, a severing device 15 being integrated in transverse sealing jaw 14 in addition, the individual bags being able to be severed from the film tube using severing device 15 after the top seam has been transversely sealed. Below transverse sealing device 12, a wiper device 16 having two wiper elements 17 are located. By operating wiper device 16, solid filling components located in the sealing zone on the inner side of the film tube can be wiped downward to prevent these filling components, such as vegetable pieces, from being sealed in in the seal groove.
Below wiper device 16, a formatting device 18 having two formatting elements 19 is located, tubular bags 20 still open at the top seam being able to be formatted in shape by means of formatting elements 19 after it having been filled with filling material.
FIG. 2 shows an enlarged perspective view of the part of tubular bag machine 01 below filling tube 07. Compressing device 09 consists of two pairs of compressing rolls 21 and 22, respectively, the compressing rolls of each set being disposed opposite each other. Compressing rolls 21 and 22 together are stored in a utility frame 23, which can be opened and closed horizontally. In the position shown in FIG. 2, compressing device 09 is in its compressing position. In this compressing position, both lower compressing rolls 21 compress the film tube so tightly in a lower pressure zone 24 that liquid filling components from above cannot flow 2U downward. Both compressing rolls 22 have a distance in the compressing position of compressing device 09 illustrated in FIG. 2 so that the gap formed between compressing rolls 22 enables liquid filling components to flow off, whereas solid filling components are retained above retaining zone 25 formed by both compressing rolls 22. By operating compressing device 09, the amount of filling material, which is to be filled into next tubular bag 20, can be precisely dosed with the aid of sensors 10 and 11. Once the desired amount of filling material has been collected in the filling tube above compressing device 09, compressing device 09 can be opened to the open position from compressing position in FIG. 2, so that the dosed amount of liquid and solid filling portions slides downward into the next tubular bag. Transverse sealing device 12 having both transverse sealing jaws 13 and 14 and severing device 15 is located below compressing device 09. For sealing the film tube at the bottom seam and/or the top seam, transverse sealing jaws 13 and 14 can be vertically displaced between the open position illustrated in FIG. 2 and a sealing position compressing the film tube. At the same time, the transverse sealing jaws can be vertically displaced in order to follow the trajectory of film tube continuously conveyed vertically downward. Below transverse sealing device 12, wiper device 16 having both wiper elements 17 are located. Thereto, formatting device 18 having both formatting elements 19 is connected. Formatting elements 19 each consist of several rotatably stored rolls 26, which are held superjacent on a frame 27. Using corresponding operating means 28, both frames 27 can be moved vertically following the movement of the film tube and at the same time be moved horizontally so as to change the distance between both formatting devices 19.
FIG. 3 shows a side view of tubular bag machine 01 having filling tube 07, compressing device 09, transverse sealing device 23, wiper device 16 and formatting device 18. Tubular bags 20 are filled with a mixture of liquid filling portions 29 and solid filling portions 30. The function of tubular bag machine 01 for executing the method according to the invention is to be described in more detail using FIGS. 4a, 4b and 4 c.
In FIG. 4a , formatting device 18 is in its open position and comprises a maximal distance between both formatting elements 19. In this wide open position of formatting device 18, tubular bag 20, which is initially transversely sealed only at bottom seam 31, is filled with the mixture of liquid filling portions 29 and solid filling portions 30. The filling with filling portions 29 causes tubular bag 20 to bulge widely at first, and an air bubble 32 forms in tubular bag 20 above the liquid level of the liquid filling portions 30.
In order to not seal in the air from air bubble 32 in tubular bag 20, formatting device 18 is subsequently moved into its formatting position, which is shown in FIG. 4b . In the formatting position, formatting elements 19 have a smaller distance so that the air is pressed upward toward filling tube 07 from air bubble 32. A large portion of the air from air bubble 32 escapes from tubular bag 20 in the process, since the top seam has not yet been transversely sealed. Once the liquid filling components have maximally risen to the top via the formatting elements 19 having been moved to their formatting position, the at first still open wiper elements are moved together horizontally in order to resiliently abut against the film web of the film tube from the outside. As soon as wiper element 16 is moved together to its wiping position, transverse sealing jaws 14 are vertically accelerated in conjunction with wiper elements 17 attached thereto so that the wiper elements are moved downward past the film tube at a differential speed. The speed of wiper elements 17 is faster in the vertical direction than the vertical direction of the conveyor speed of the film tube, so that the solid filling components on the inner side are wiped downward by compressed wiper elements 17. As a result, the solid filling components can be removed from the seal zone. At the same time, the volume in tubular bag 20 available for receiving air bubble 32 is further reduced, so that the pressure in air bubble 32 increases and the air from air bubble 32 is pressed upward on the inner side of the film tube by wiper elements 17.
Once the air is essentially entirely pressed out of air bubble 32, as illustrated in FIG. 4c , transverse sealing jaws 14 of transverse sealing device 12 are moved together and the top seam of tubular bag 20 is sealed, whereby tubular bag 20 is closed. Subsequently, tubular bag 20 is separated by the drive of severing device 15 and can fall downward through the formatting chute formed by formatting elements 19. At the same time, compressing rolls 21 and 22 of compressing device 09 are moved to their open position, so that filling components 29 and 30 can slide down from above and fill next tubular bag 20.
FIG. 5 shows the trajectory of transverse sealing jaws 13 and 14 and wiper elements 17 attached thereto in a schematic view. Along a first trajectory section 33, wiper elements 17 already abut against film tube 34 and are moved vertically downward in conjunction with transverse sealing jaws 13 and 14 at a vertical speed, which is higher than the vertical conveyor speed of film tube 34. By moving wiper elements 17 relative to film tube 34, solid filling components 30 are wiped downward and at the same time, air from air bubble 32 is pressed out of tubular bag 20 before producing the top seam. Along a second trajectory section 35, transverse sealing jaws 13 and 14 are also moved together and the top seam of tubular bag 20 and the bottom seam of following tubular bag 20 are sealed. Transverse sealing jaws 13 and 14 in conjunction with wiper elements 17 are driven downward at the same vertical conveyor speed as film tube 34, so that there is no relative movement between film tube 34 on the one hand and transverse sealing jaws 13 and 14 and/or wiper elements 17 as a result.
FIG. 6 shows an enlarged schematic view of transverse sealing jaws 13 and 14 with severing device 15 and wiper elements 17 attached below transverse sealing jaws 13 and 14. Wiper elements 17 are displaceably mounted in a resilient manner, so that the air pressure, which increases in air bubble 32 when wiper elements 17 are displaced along first trajectory section 33, ensures that the air pushes wiper elements 17 slightly apart so that the air can escape air bubble 32.

Claims

1. A method for operating a tubular bag machine (01) for the continuous production of tubular bags (20), which are filled with a mixture of liquid and solid filling components (29, 30), the tubular bag machine (01) having

a) a biaxially driven transverse sealing device (12), the transverse sealing jaws (13, 14) of the transverse sealing device (12) sealing a film web (03) after forming a film tube (34) having a bottom seal (31) and a top seal,

b) a compressing device (09) which is disposed above the transverse sealing device (12), the compressing device (09) comprising at least two compressing elements (21, 22), which are contacted on the outer side of the film tube (34) and are displaced horizontally between a closed position and an open position, and the compressing elements (21, 22) compressing the film tube (34) in a liquid-proof manner in the closed position,

c) a wiper device (16), which is disposed below the transverse sealing device (12), the wiper device (16) comprising at least two wiper elements (17), which are contacted on the outer side of the film tube (34) and are displaced horizontally between a wiping position and an open position, the wiper elements (17) in the wiping position wiping solid filling components (30) downward, which are in the sealing zone on the inner side of the film tube (34),

characterized in that

a formatting device (18), by means of which the bag shape of the tubular bag (20) open at the top seal is formatted, is disposed below the wiper device (16), the formatting device (18) comprising at least two formatting elements (19), which are contacted on the outer side of the film tube (34) and are displaced between an open position and a formatting position, and the horizontal distance between the formatting elements (19) being larger in the open position than in the formatting position, and the formatting elements (19) being moved to the open position before and/or while filling the tubular bag (20) with filling material (29, 30), and the formats ting elements (19) being moved to the formatting position while and/or after filling the tubular bag (20) with filling material (29, 30) and before producing the top seam to remove air from the air bubble (32) in the top area of the tubular bag (20) via filling material components (29, 30).

2. The method according to claim 1,

characterized in that

the formatting elements (19) of the formatting device (18), which abut against the outer side of the tubular bag (20) in the formatting position, are vertically displaced at the same vertical speed as the film tube (34).

3. The method according to claim 1 or 2,

characterized in that

the wiper device (16) remains in the open position until the formatting device (18) is moved to the formatting position.

4. The method according to any one of the claims 1 to 3,

characterized in that

the wiper elements (17) of the wiper device (16), which abut against the outer side of the tubular bag (20) in the wiping position, are vertically displaced along a trajectory section (33) at a higher vertical speed than the tubular bag (34).

5. The method according to any one of the claims 1 to 4,

characterized in that

at least one air-permeable venting channel is formed between the inner surfaces of the tubular bags (20) in the wiping position of the wiper device (16), air being able to escape the air bubble (32) in the top area of the tubular bag (20) via the venting channel.

6. The method according to any one of the claims 1 to 5,

characterized in that

the top seal of the tubular bag (20) is transversely sealed using the transverse sealing device (12) as soon as the air from the air bubble (32) in the top area of the tubular bag (20) has escaped via the air-permeable venting channel between the inner surfaces of the tubular bag (20) safe an insignificant remainder.

7. The method according to any one of the claims 1 to 6,

characterized in that

the compressing device (09) forms two retaining zones (24, 25) in the closed position, the film tube (34) being compressed in a liquid-tight manner in the lower retaining zone (24), and the film tube (34) being compressed so tightly in the upper retaining zone (25) while maintaining a liquid-permeable residual gap that solid filling components (30) cannot pass through the residual gap.

8. A tubular bag machine (01) for the continuous production of tubular bags (20), which are filled with a mixture of liquid and solid filling components, having

c) a wiper device (16) which is disposed below the transverse sealing device (12), the wiper device (16) comprising two wiper elements (17), which are contacted on the outer side of the film tube (34) and are displaced horizontally between a wiping position and an open position, the wiper elements t 17) in the wiping position being able to wipe solid filling components (30) downward, which are in the sealing zone on the inner side of the film tube (34),

characterized in that

a formatting device (18), by means of which the bag shape of the tubular bag (20) open at the top seal is formatted, is disposed below the wiper device (16), the formatting device (18) comprising at least two formatting elements (19), which are contacted on the outer side of the film tube (34) and are displaced between an open position and a formatting position, the horizontal distance between the formatting elements (19) being larger in the open position than in the formatting position.

9. The tubular bag machine according to claim 8,

characterized in that

the horizontal distance between the formatting elements (19) in the open position and/or the horizontal distance between the formatting elements (19) in the formatting position is adjustable.

10. The tubular bag machine according to claim 8 or 9,

characterized in that

the formatting elements (19) of the formatting device (19) each comprise several rotatably stored rolls (26), the rolls (26) being disposed subjacent so as to be parallel to one another, and the rolls (26) of the two formatting elements (19) together forming a roll chute contactable on two sides of the tubular bag (20).

11. The tubular bag machine according to any one of the claims 8 to 10,

characterized in that

the formatting device (1) and the transverse sealing device (12) are vertically driven using a shared drive device.

12. The tubular bag machine according to any one of the claims 8 to 11,

characterized in that

the wiper elements (17) of the wiper device (16) are resiliently mounted on the transverse sealing jaws (13, 14) of the transverse sealing device (12), the wiper elements (17) springing back when surpassing a certain excess pressure in the air bubble (32) in order to form an air-permeable venting channel between the inner surfaces of the tubular bag (20), through which air from the air bubble (32) in the top area of the tubular bag (20) escapes.

13. The tubular bag machine according to any one of the claims 8 to 12,

characterized in that

the compressing device (09) comprises two pairs of compressing elements (21, 22) for forming two retaining zones (24, 25), the compressing elements (21, 22) of each pair being superjacent, the first pair of compressing elements (21) compressing the film tube (34) in a lower retaining zone (24) in the closed position of the compressing device (09) so as to be impermeable to liquid, and the second pair of compressing elements (22) compressing the film tube (34) so tightly in an upper retaining zone in the closed position of the compressing device (09) that the film tube (34) retains solid filling components (30) while maintaining a liquid-permeable residual gap.

14. The tubular bag machine according to any one of the claims 8 to 13,

characterized in that

the compressing elements (21, 22) of the compressing device (09) are designed in the manner of compressing rolls.

15. The tubular bag machine according to any one of the claims 8 to 14,

characterized in that

the compressing rolls (21) are at least partially driven by motor.