EP2272790B1 - Device and method for filling multi-component drinks - Google Patents

Description

description

The present invention relates to an apparatus and a method for filling liquids and in particular beverages according to the preambles of claims 1 and 5. Such apparatus and methods are well known in the art for a long time. In particular, the invention will be described in terms of a device for filling multi-component beverages, for example beverages composed of a syrup and an aqueous medium. It should be understood, however, that the present invention may be applied to other devices for bottling beverages as well as other liquids such as milk, juices, soft drinks or oils, but also more viscous media.

In such devices for bottling drinks, a plurality of flow measuring devices are usually used, which determine the flow rates of the respective components. These flow measuring devices are sometimes prone to failure and errors in the determination of quantities lead directly to undesirable mixtures of the beverage to be filled. Especially with particle interspersed liquids such flow measuring devices often do not work reliably.

An apparatus and a method according to the preambles of claims 1 and 5 is of the EP 0 775 668 A1 disclosed.

From the DE 10 2006 045 987 A1 a method for filling containers with a liquid product and a filling system is known. In this case, at least two components of the filling material are mixed together. At least one of the components is supplied using a flow meter volume and volume controlled.

The EP 1 362 825 B9 describes a rotary machine for filling containers. In this case, a supply device for additives has a plurality of tubes, wherein along the tubes means for interrupting the opening of the tubes are arranged to open and close them. The US 5,829,476 discloses a dual flow fill valve with one feed channel disposed within the other.

The present invention has for its object to provide an apparatus and a method available, which provides a simplified filling of drinks in containers and preferably also a simplified overall operation of the plant. Furthermore, possibilities are to be created to reduce the number of measuring devices required for determining the filling quantity.

This is achieved according to the invention by the subject-matter of independent claims 1 and 5. Advantageous embodiments and further developments are the subject of the dependent claims.

A device according to the invention for filling liquids and in particular drinks into containers has a filling device which fills the liquid into the containers. Furthermore, a liquid line is provided which supplies the liquid to the filling device, wherein the liquid flows in the liquid line in a first flow direction and wherein in the liquid line a flow measuring device is arranged, which determines the amount of the flow meter in the first flow direction passing liquids.

The flow measuring device is designed such that it also determines the amount of the fluids passing through the flow measuring device in a second flow direction, which is opposite to the first flow direction.

It is therefore proposed according to the invention to provide a flow measuring device, which not only determines the amount of amount of liquid flowing through, but also allows a distinction with respect to the flow direction. In this way, for example, when a second component is supplied, these can be added downstream to the flow measuring device, resulting in a temporary reflux of the first liquid component. Based on this reflux or its amount the amount of second component supplied can be determined. It should be noted, however, that the second fluid is not necessarily a second component. Thus, the invention would also be applicable, for example, to send a cleaning medium through the device in a cleaning operation, wherein the flow measuring device could also determine the amount of cleaning agent here.

According to the invention, the device has a second liquid line in order to supply a second liquid to the filling device. In this way, the invention is particularly suitable for the production of multi-component drinks. On the other hand, this second liquid line can also be a flushing line, which supplies a flushing agent to the filling device for its cleaning, for example in a special cleaning operation.

According to the present invention, the second liquid line opens into the first liquid line. In this way, a mixture can be made in the region of this confluence and in this way the plant can be controlled so that at the beginning of a special filling of a container and at the end of each only a specific product is used, for example water, which no fruit pieces or the like contains.

According to the invention, the second liquid line is arranged such that in a working operation of the device the second liquid does not pass through the flow measuring device. This is particularly important if the second component is a liquid with pieces of fruit or the like. It should be ensured that the volume between the flow measuring device and the junction of the second liquid line is large enough, so that even when supplying a second medium this can not pass through the flow meter, otherwise the measurements can be affected.

In an advantageous embodiment, the device has a filling state measuring device which determines the filling of the containers to be filled. For example, load cells may be provided which weigh the individual containers to be filled, in particular during the filling process. However, the filling state measuring devices may also be a fill level probe or may be further flow measuring devices which determine the quantity of the product flowing directly into the containers.

In a further advantageous embodiment, the second liquid can be brought into flow connection with the first liquid. Preferably, the second liquid is in fluid communication with the first liquid in front of an outlet of the filling device. In this way, z. B. the filling of a beverage stopped and then a second component are supplied to a mixing region, wherein the amount of this second component is determined by the flow measuring device in the reverse flow direction.

In a further advantageous embodiment, the filling device has a valve device in order to control the inflow of at least one liquid into the container. This valve device is advantageously provided downstream of the junction of the second liquid line in the first liquid line, so that only one valve is provided which controls the supply of the mixture already prepared in the containers.

In a further advantageous embodiment, the device has a reservoir for the first liquid. In addition, reservoirs for a second fluid such as annular channels can be provided.

In a further advantageous embodiment, a controllable valve is provided in the second fluid line. This means that the second component can be added by means of this valve. Advantageously, this valve is controlled based on the data of the flow meter. For example, this valve can be opened to supply the second component and as soon as the flow measuring device detects a certain amount of liquid (in particular in the rearward flow direction), the valve is closed again. Preferably, in this time the valve means of the filling device is closed.

The present invention is further directed to a method for filling liquids and in particular beverages in containers, wherein a first liquid is filled by means of a filling device in the containers and the liquid is supplied by means of a first liquid line of the filling device, wherein the liquid in a first Flow direction flows and wherein a flow measuring device determines a quantity of the flow meter in the first flow direction passing liquid.

According to the invention, the first liquid flows at least temporarily in the liquid line in a second flow direction opposite the first flow direction, and the flow measuring device determines a quantity of the liquid passing through the flow measuring device in the second flow direction.

Thus, it is also suggested on the method side to measure the amount in both directions of flow of the first liquid in order to be able to draw conclusions about the quantity of a supplied second medium or, for example, a flushing medium.

In a preferred method, the containers are supplied with a second liquid and at least temporarily there is a flow connection between the first liquid and the second liquid. During the feeding of the second liquid, a main valve, which directs the liquid into the containers, is preferably closed. In this way, the supply of the second liquid causes the first liquid to flow back through the flow measuring device, so that the amount of second liquid supplied can be deduced from the values output by the flow measuring device. Preferably, therefore, the flow connection is made upstream of the valve means of the filling device.

Thus, in a preferred method, a quantity of second liquid to be filled into the container is determined from a flow rate of the first liquid passing through the flow measuring device in the second flow direction.

In a further preferred method, a control device controls at least one valve, which controls the supply of the second liquid into the container, as a function of measuring signals.

In a further preferred method, a gaseous product is also supplied to the container. This may be, for example, CO ₂ , if a filling with a carbonated liquid is desired. However, this supply of gas can also be done before filling with the liquid. When bottling still beverages, for example, nitrogen can be added before and / or after filling.

In a further advantageous method, a third liquid is supplied in the containers and at least temporarily there is a flow connection between the first liquid and the third liquid.

Preferably, the second liquid and the third liquid of the filling device are supplied with a time delay. By means of this time-delayed feeding, the quantities of both the second and the third liquid can also be determined with only one flow measuring device.

Further advantages and embodiments will become apparent from the accompanying drawings.

Fig. 1

eine schematische Darstellung einer Anlage zum Befüllen von Getränkebehältnissen;

Fig. 2

eine blockdiagrammartige Darstellung eines Aspektes der vorliegenden Erfindung;

Fig. 3

eine Schnittdarstellung einer Einfülleinrichtung;

Fig. 4

eine schematische Schnittdarstellung einer erfindungsgemäßen Einfülleinrichtung;

Fig. 5

eine perspektivische Darstellung einer Einfülleinrichtung und

Fig. 6

eine schematische Schnittdarstellung der in Fig. 5 gezeigten Einfülleinrichtung.

Show:

Fig. 1

a schematic representation of a system for filling beverage containers;

Fig. 2

a block diagram representation of an aspect of the present invention;

Fig. 3

a sectional view of a filling device;

Fig. 4

a schematic sectional view of a filling device according to the invention;

Fig. 5

a perspective view of a filling device and

Fig. 6

a schematic sectional view of in Fig. 5 shown filling device.

Fig. 1 shows a schematic representation of a system 60 for filling containers. This plant 60 in this case has a container feed 62, which feeds containers along an arrow 64 via a feed star 64 of a rinsing device 66 or a rinser.

The reference numeral 68 refers to an outlet star of the rinsing device 66, which takes over the rinsed containers and passes over a transfer star 70 and a Füllereinlaufstern 72 to a device 1 for filling the drinks. With this device 1 here two-component drinks are filled. The reference numerals A to G denote different process steps, which are traversed when bottling the drinks. Thus, in a step A, the container is pressed against a filling device and in a step B, a bias takes place or the container is subjected to a gaseous medium, such as carbon dioxide. In a step C, a clear stuffing of the container with a major product, such as a carbonated beverage. In a step D, a secondary product can be supplied or a secondary product graft can be introduced into the main product. In area E, refilling of the main product takes place. The reference symbol T _E denotes the end of the filling of the container with the beverage.

In a step F, a calming or relieving the bottled beverage can be made and in step G, a removal of the container from the filling device.

The reference numeral 78 refers to an outlet starter of the device 1 and the reference numeral 80 to a closing device in order to close the containers with closures, wherein the reference numeral 82 refers to a container closure supply means. The reference numeral 84 denotes an outlet star of the capper and the reference numeral 86 a discharge device for transporting away the filled containers.

The reference numeral 76 indicates a blind spot in which no containers are filled or no containers are arranged at corresponding filling stations. In this Blind spot between the Füllerauslauf- and the inlet star is a dosage of the additional product to the main product possible. Thus, this angle is used for the filling process and in this way the overall performance of the filler can be increased because the dosage does not have to be in the usually available angular range (A to G). This dosage will be described in detail with reference to the other figures. In terms of the method, it is therefore proposed that the metered addition of the further liquid to the first liquid take place in a time-delayed manner to the filling of the container.

This serves the in Fig. 1 also shown apparatus for mixing drinks from at least two or more different liquids. These liquids can be, for example, water, syrup and / or flavorings in a predetermined mixing ratio per container volume to be filled. Again, it is advantageous to merge the different liquids in the room, which follows after the division to the individual filling valves. In one aspect of the invention, it is proposed that the bringing together of the different media takes place so close to the filling valve outlet that the metered-in medium is advantageously discharged independently with the subsequent container filling. By doing so, each successive filling can be varied with multiple flavor feeds. In addition, critical products such as pulp can be flushed away from the valve device or the valve cone in this way.

Fig. 2 shows a block diagram-like representation of a device according to the invention 1. In this case, reference numeral 24 refers to a reservoir for the main product. From this reservoir 24, the product passes via a first liquid line 4 to the filling device 2, which is not shown in greater detail in FIG. 2. The reference numeral 6 refers to a flow measuring device which can measure the liquid flow in the direction R1. Preferably, the flow measuring device 6 is an inductive flow meter.

The reference numeral 20 denotes a filling valve to control the filling of the liquid in the container 10.

Via a second liquid line 12, which is fed by an annular channel 7, a secondary product, such as a syrup, here the liquid line 4 and the filling device 2 are supplied.

During the filling process, it would be possible to close the valve 20 and then open the valve 16 for supplying the secondary fluid. This in turn causes the main liquid in the liquid line 4 to be forced back, thus flowing in the area of the flow meter in the flow direction R2.

Since the flow measuring device 6 is suitable for also determining the flows in the direction R2, it can be determined on the basis of these measurements how much liquid was supplied via the line 12. However, the length of this liquid line 4 is preferably dimensioned so that the product, which is located in the conduit 12, is not pressed by the flow meter 6 itself.

The reference numeral 26 refers to a control device which receives the measurement signals of the flow measuring device 6 and, for example, the valve 16, but also the valve 20, controls. In this way, an automated filling of the container can be achieved. The control device may also be installed remotely, the measurement signals being transmitted from the flow measuring device to the control device and the remote control device then controlling the valves.

As mentioned above, when metering in products via the liquid line 12, for example lumpy products, they do not have to be forced through the flow measuring device 6. Otherwise this would affect the accuracy of the measurement. Therefore, the volume of the product line between the flow meter and the actual metering point is to be calculated correspondingly large that only the main product is pressed backwards by the flow meter 6.

It is also possible that the second liquid line (secondary product line) 12 in the direction of the flow measuring device 6 further away from the valve outlet of the filling device 2 in the main product line or the first liquid line 4 forms. In this way, a clear stuffing can be done, ie the secondary product is used as a graft between filled two parts of the main product. In this case, however, it is advantageously taken into account that the following part of the main product is large enough to completely flush the secondary product, ie the second liquid, out of the valves.

This clear stuffing has the advantage that when dosing fruit cells or pieces of fruit immediately during the opening of the valve or its valve cone a perfect filling jet is formed. If fruit cells are present on the valve cone during opening, they could interfere with the immediate formation of the filling jet, which could cause the product to splash over uncontrollably.

In Fig. 2 Here, a radial feed of the secondary product via the line 12 is shown. However, it would also be possible that this metered addition of the secondary product takes place in other directions, for example tangentially or otherwise obliquely into the first line 4. In this way, the mixing of main and secondary product in the main line 4 can be improved, whereby the flushing of the secondary product is simplified.

The reference numeral 14 refers to a third liquid line, with the example, via a ring channel 9, a further liquid can be supplied. Again, a valve 18 is provided, which controls the inflow of this product into the filling device 2 or the valve 20.

Reference numeral 11 refers to a channel for a gaseous medium, such as carbon dioxide. This channel 11 is in contact with the reservoir 24 via a connecting line 15 in order to form a gas phase in this reservoir or to load the main product, the filling level of which is designated here by the reference N. Another connecting line 17 connects the channel 11 with the container. In this channel 17 is a return gas channel, which leads the CO ₂ back into the channel 11 during the filling of the containers. The reference numeral 22 refers to a valve, which serves here as a return gas valve and biasing valve.

Reference numeral 21 denotes (electrical) control lines, via which the control device 26 communicates with the individual valves 20, 16, and 18. Preferably, the secondary medium, which is supplied via the liquid line 12, fed under a higher pressure than the product in the first liquid line 4. In this way, on the one hand, a repression of the product in the liquid line 4 can be achieved, and on the other hand, two gas offset Liquids are merged in this way. Also for the liquids in the third liquid line 14, a higher pressure can be applied, as for the liquid in the first liquid line 4th

Depending on the product, the metering region or the metering point can be designed in any nozzle shape or even as a diffuser, the mixing being improved after the metering. Furthermore, it would also be possible to meter the syrup or the additional product under CO ₂ pressure in the case of counter-pressure filling, or to meter in the syrup easily "ankarboniert". In this way, a possible CO ₂ unbound by turbulence in the mixing area can be counteracted.

The return gas channel 17 could also be used as a CIP (cleaning in place) return channel. It would be possible to provide a branch from this channel in a CIP return path, for example after the valve block with return gas and / or bias valves. In particular, in the case of more complex filling methods, the valve block (not shown) has a plurality of gas valves for various functions, via which a separation of the return gas channel into a plurality of gas channels in the channel carrier 23 takes place.

Furthermore, it would be possible in an embodiment with multiple metering points on a filling valve to use the filling also to "multi-color filling" in which are filled from filling valve to filling valve different products or a commission-related filling is made or the various products are successively within the same production layer be bottled, with a very fast change from one product to another can take place.

To control this known from the prior art filling method, the device according to the invention - as well as applicable for the filling method according to the invention - a filler control device, not shown, such as a PLC on.

Fig. 3 shows a filling device 2 according to an aspect of the invention. This filling device or filling valve in this case has a valve device 20, which in turn has a valve body or valve stem 38. Reference numeral 12 refers to the second liquid line for supplying the secondary product. Via a valve 16, the supply of this secondary product is regulated via a connecting line 44 into a mixing chamber 42. The reference numeral 34 denotes the outlet of the valve 20, from which liquid is passed into the containers. Reference numeral 54 denotes a housing of the filling device. Return gas, for example CO _2, can be removed again via a return gas channel 33. The valve body 38 is movable in the longitudinal direction L and can control in this way the supply of product to the outlet 34 and thus into the container.

For this purpose, the valve has a sealing washer 52, which presses in a closed state of the valve against a housing portion 57 and thus closes the valve. Reference numeral 56 denotes a corresponding poppet.

The reference numeral 46 denotes a supply passage for supplying the main product within the filling device. It can be seen that the channel 46 is adjacent or directly adjacent to the valve region. By the reference numeral 53, the product to be filled is marked.

In the Fig. 3 Filler 2 shown is particularly suitable for mixing and filling of carbonated liquids mixed with syrup, especially in combination with fruit fibers. It is already known from the prior art to pass two liquids from two separate containers into a common mixing space. Usually, a filling system is used to fill liquids with a proportion of fibers or solids, which seals immediately before the filling valve outlet. With this special outlet geometry, there is no product after the filling after the filling so that a gas barrier can be dispensed with. A gas barrier is a component which prevents the escape of liquids from a unilaterally open line by utilizing the surface tension. However, such gas barriers are not suitable for a larger proportion of fruit fibers.

However, it is also used in the context of the invention on this proven system for retention and shutdown. However, an improved or flow-optimized supply line according to the invention takes place to the filling valve outlet 34, which, as mentioned above, is sealed with the cone 56. For each additional medium that is to be mixed, for example via the line 44, a further supply line leads to the common mixing chamber 42, which is designed so that the mixing of the various media from filling to filling is reproducible.

In order to ensure the desired sequence of filling, each supply line has a shut-off device, like here the valve 16. The different metered quantities of the supplied media can be measured by known measuring means, for example by means of a flow measuring device (not shown).

Furthermore, it is advantageous for one, several or all media a dosage over a given volume flow and a flow time given. The prerequisite for this is that the liquids are brought together as close as possible to the outlet 34 and designed accordingly.

Fig. 4 shows a further illustration of a device according to the invention, in particular suitable for the filling of liquids with a fruit pieces or fibers containing secondary product. It can be seen here next to the actual filling device 2 and their environment, ie in particular the first supply line 4 and the second supply line 12 for the secondary product. This second supply line 12 is fed from a reservoir 27, which is higher here than the reservoir 24, so that the liquid passes under a higher pressure in the filling device 2, as the liquid in the liquid line 4. The reference numeral 51 refers to an actuator for actuating the valve body 56 in the longitudinal direction L, such as a pneumatic drive. The reference numeral 58 again identifies the housing of the filling device 2. The reference numeral 45 refers to a bellows, which is part of the valve 16, so that the valve area can also be flowed around by the liquid. A corresponding bellows 59 is also provided in the filling device 2 and can therefore be lapped by the main product which originates from the feed line 4.

When filling the first to be filled medium, for example, the main product is first filled, by the corresponding valve is switched in the media supply and the others are closed. Subsequently or simultaneously, the filling valve outlet is switched on, or the valve 20 is opened. The filling valve outlet 34 is closed again after reaching the desired subset. However, even with the valve 20 open (cf. Fig. 2 ) the media will be switched if this happens without any overlap. As mentioned above, the following medium displaces the subsequent medium so that a reproducible mixing ratio is obtained.

Preferably, each supply line here has a separate shut-off device or valve for the liquid.

Fig. 5 shows a further illustration of a filling device 2 according to the invention and its environment. In this case, the reference numeral 58 again refers to a housing and the reference numeral 51 to a valve drive for driving the valve, which is arranged on the housing 58 via a fastening device 92. The reference numeral 34 again indicates the valve outlet. In the two product lines 4 and 12 here orifices or throttles 94, 96 are arranged. The products are supplied as shown by arrows P3 and P4. The reference numerals 16, 18 each relate to a diaphragm valve, which are each actuated by a drive 97, 99.

Fig. 6 shows a sectional view of in Fig. 5 shown filling device. Here again, a valve cone 56 can be seen, which can be moved in the direction L and can rest against a valve seat 57. Via the first feed line 4, the main product is fed via a feed channel 55 into a mixing space 42. In this mixing chamber 42, the main product can be mixed with a derived from the product line 12 secondary product (preferably with the valve 20 closed). Here, the by-product channel 44 completely surrounds the main product channel 55 in the circumferential direction.

The reference numeral 59 again indicates the bellows, which allows channeling of the channel 55 for the main product. Within this bellows, an actuating rod is guided for actuating the valve. The reference numeral 49 refers to a centering device For the valve cone 56. It can be seen here that the second connection 32 for the secondary product (or the second liquid) is arranged lower than the first connection 34 for the main product (or the first liquid). Furthermore, the channel 39 is adjacent to the valve cone 56, so that it can always be ensured that the container is first filled with the main product and also towards the end again with the main product.

The reference numeral 65 denotes a vent hole and the reference numeral 69 a return spring in order to move the valve plug 56 in the unopened state into its closed position. Thus, the channel 44 in the in Fig. 6 As shown above, surrounds the channel 55. The two leads 4 and 12 each have extension regions 37, which serve for the flow-optimized supply of the two products.

By the in Fig. 6 As shown arrangement, crossings of the channels 44 and 55 can be avoided, or the two product channels are intertwined. The mixing chamber 42 is arranged here in the immediate vicinity of the valve body 56 and preferably also the inlets or the two ports 32 and 39 are each provided above this mixing region 42.

LIST OF REFERENCE NUMBERS

1

contraption

2

filling device

4

first liquid line

6

Flow meter

7.9

annular channel

10

container

11

channel

12

second liquid line

14

third fluid line

15, 17

connecting line

16, 18

Valve

20

filling valve

21

control line

22

Valve

23

channel support

24, 27

reservoir

26

control device

32

second connection

33

Return gas channel

34

Outlet of the valve

37

extension regions

38

tappet

39

first connection

42

mixing room

44

connecting line

45, 59

bellow

46

feed

49

centralizing

51

valve drive

52

sealing washer

53

Product to be filled

54

casing

55

channel

56

shuttle

57

Housing section, valve seat

58

casing

60

investment

62

container supply

64

feed star

65

vent hole

66

flushing

68

outlet star

69

Return spring

70

transfer star

72

Filler inlet star

76

Blind Spot

78

outlet star

80

closing

82

Feeding device for container closures

84

outlet star

86

removal device

92

fastening device

94, 96

throttle

97.99

drive

A - G

steps

L

longitudinal direction

N

level

P1

arrow

R1, R2

flow direction

Claims (11)

1. An apparatus (1) for filling liquids and in particular beverages into containers (10), including a filling device (2) for filling the liquid into the containers (10), including a first liquid line (4) which supplies a first liquid to the filling device (2), wherein the first liquid in the liquid line (4) flows in a first flow direction (R1) and wherein a flow measuring device (6) is disposed in the first liquid line (4), which flow measuring device determines the quantity of the first liquid passing through the flow measuring device (6) in the first flow direction (R1),
   and wherein the apparatus has a second liquid line (2) in order to supply a second liquid to the filling device (2) which flows into the second liquid line (4),
   characterized in that the second liquid line is arranged in such a way and the apparatus is determined so that in a working state of the apparatus (1), the second liquid doesn't pass the flow measuring device (6) and a quantity of the second liquid to be filled into the container (10) is determined from a flow rate of the first liquid passing through the flow measuring device (6) in the second flow direction (R2).
2. The apparatus (1) as claimed in Claim 1, characterised in that the second liquid may be brought in fluid communication with the first liquid.
3. The apparatus as claimed in claim 1 or 2, characterised in that the filling device (2) includes a valve means (20) in order to control the supply of at least one liquid into the container.
4. The apparatus as claimed in at least one of the preceding claims, characterised in that a controllable valve (16) is disposed in the second liquid line (12).
5. A method for filling liquids and in particular beverages into containers (10), wherein a first liquid is filled into the containers (10) by means of a filling device (2) and the liquid is supplied to the filling device (2) via a first liquid line (4), wherein the first liquid flows in a first flow direction (R1) and wherein a flow measuring device (6) determines a quantity of liquid passing through the flow measuring device (6) in the first flow direction (R1),
   characterised in that the first liquid flows at least temporally in the liquid line (4) in a second flow direction (R2) which is opposite to the first flow direction and the flow measuring device (6) determines a quantity of liquid passing through the flow measuring device (6) in the second flow direction (R2).
6. The Method as claimed in Claim 5, characterised in that a second liquid is supplied to the containers and' at least temporally a fluid communication exists between the first liquid and the second liquid.
7. The method as claimed in Claim 6, characterised in that from a flow rate of the liquid passing through the flow measuring device (6) in the second flow direction (R2), a quantity of second liquid to be filled into the container (10) is determined.
8. The method as claimed in Claim 5, characterised in that a control device controls at least one valve depending on measurement signals, which valve influences the supply of the second liquid into the container.
9. The method as claimed in at least one of the claims 5 to 8, characterised in that also a gaseous product is supplied to the container.
10. The method as claimed in at least one of the claims 5 to 9, characterised in that a third liquid is supplied to the containers and a fluid communication exists at least temporally between the first liquid and the third liquid.
11. The method as claimed in Claim 10, characterised in that the second liquid and the third liquid are supplied to a filling device (2) in a time-delayed manner.

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