EP2103520A1 - Handling device and method for handling an open sack filled with bulk goods - Google Patents

Abstract

The device (10) has a suction mechanism (4) for sucking air from a head area of an open sack, and a cleaning device (5) for cleaning a sack opening of the sack. The suction mechanism and the cleaning device are arranged on a common treatment body (7), which is moved between a treatment position and a stationary position. The mechanism is immersed into a sack interior of the sack in the treatment position, while the cleaning device remains outside. The treatment body comprises a longitudinally extended base plate (12), and an immersion unit (13) is provided on the plate. Independent claims are also included for the following: (1) a packaging machine comprising a filling component for filling bulk material in an open sack (2) a method for treating a open sack filled with bulk material.

Description

The present invention relates to a treatment device and a method for treating an open bag, in particular filled with a bulk material, wherein the bag is filled in particular with a pulverulent or powdery dusty product and is closed at a closing station.

There have been known in the art devices and methods for filling bulk materials in open bags, which are welded after filling, for example, by a welding process to close the bag tight.

Open sacks are often made of plastic film that protects the bag contents from moisture. One of the reasons why building materials such as cement are increasingly being filled into open sacks made of plastic film. These offer the considerable advantage that they do not usually have to be protected from rain on the construction site.

For transporting and storing such bags filled with, for example, cement, it is furthermore of considerable advantage if the bags assume a cuboid shape, since they are then simply stackable and capable of being palletized.

When filling the open bags with the bulk material, air also enters the bag at the same time. To vent the bag, for example, vibrating devices are used, which ensure the compression and venting of the product before closing the bag. Nevertheless, there is still a residual air content in the filled sacks, which is then partially pressed out, for example, in a press line to provide better stackability of the bags.

In order that the air still contained in the bag can escape in the press section, air channels are provided in the bag wall, through which part of the still contained air escapes at the applied pressing pressure. But through these channels not only air can escape from the interior of the bag to the outside, but in unfavorable cases it can also happen that moisture from the outside enters the bag, which can spoil the product. In addition, product can also escape.

To remove the air still in the bag is with the DE 195 41 975 A1 a method and apparatus for forming and venting open bags after the filling process has become known, in which the upper edges of the projections of the bag wall are clamped with jaws and in which the clamping jaws are rolled after filling in the direction of the filling material level present in the bag, to remove the contained air from the sack via a lance introduced into the product through the upper opening of the sack and subject to vacuum. A disadvantage of the known device is that not only air but also filling material is discharged through the lance introduced into the bag.

With the WO 2005/118415 A2 For example, a method for filling open sacks with powdery material has become known, after which the sack is first shaped and a first, lower end is closed. After filling and before closing the bag, a suction device is inserted at the top of a side end of the bag into the interior of the bag and there is sucked out excess air from the bag. In addition, a traveling cleaning device along the The top opening of the bag is reciprocated from one side to the other side to clean the inner top edge of the bag with an air jet during reciprocation with the cleaning device, thereby removing particles. However, a disadvantage of this known state of the art is the considerable expense with the suction device dipping into the bag and the additional cleaning device. Both the suction device and the cleaning device must be moved to the bag in each case. In addition, the cleaning device still has to be automatically moved back and forth along the upper edge.

In view of the background of the prior art, it is the object of the present invention to provide a treatment device and a closure station, as well as a method for treating a filled open bag, thus enabling effective venting and reliable closing of a filled open bag. In particular, the effort should be less than in the known state of the art.

This object is achieved by a treatment device with the features of claim 1. A packing machine according to the invention is the subject of claim 13. The inventive method is the subject of claim 14. Preferred developments of the invention are the subject of the respective subclaims. Further advantageous features and embodiments of the invention are illustrated in the embodiment.

The treatment device according to the invention for treating an open bag filled with a bulk material comprises at least one suction device for extracting air from the head space of the open bag and at least one cleaning device for cleaning the bag opening of the bag. In this case, the suction device and the cleaning device are arranged on a common treatment unit or a common treatment body. The treatment body is movable between at least one treatment position and at least one rest position. The suction device is intended to submerge in the treatment position in the headspace of the bag, while the cleaning device at least substantially and in particular remains completely outside the bag interior.

The treatment device according to the invention has many advantages. A significant advantage is that at the same time a suction of the residual air contained in the bag volume and a cleaning of the bag wall in the upper bag opening is possible. This allows a faster and more effective treatment of the bags.

By the common treatment unit or provided on a common treatment body suction device and also provided there cleaning device can be cleaned inside with only one controlled movement of the upper bag edge, while at the same time excess air is sucked. In the cited prior art, however, each unit must be introduced separately in the upper bag opening. According to the invention, however, the common treatment body with only one movement immersed in the upper opening of the bag. This represents a considerable simplification. For example, only one drive is needed.

Furthermore, in the prior art, a collision of the various devices must be eliminated while moving the cleaner from one side of the bag to the other. According to the invention, such a coordination of the movements of two separate devices is not required, whereby the effort drops again.

Due to the fact that the suction device of the treatment device dips into the head space and in particular only into the headspace of the bag above the product level or filling material level, an effective and rapid suction is made possible, the suction of bottled product being reliably prevented.

The treatment device according to the invention allows a drastic reduction of the residual air remaining in the filled bag, wherein the residual air in the bag is reduced in particular such that it is possible to dispense with a downstream pressing section. This means, in particular, that the air volume discharged from the head space of the filled bag preferably corresponds approximately to the residual air volume typically pressed out in a press section, so that a separate pressing of the bags can be dispensed with. This makes it possible to provide fewer ventilation channels from the interior of the bag to the exterior of the bag or even to do without it altogether, whereby the risk of the ingress of moisture is further reduced.

In addition, the palletizing capability of the bags treated according to the invention increases.

It is also possible and preferred for the treatment device to be used in a packing machine which produces open sacks from a continuous film web and then fills these open sacks with the bulk material before they are treated with the treatment device according to the invention, whereupon the open sacks are replaced by a sack Welding process are sealed.

It should be noted at this point that the treatment device may be part of a packaging machine, which fills pre-assembled open bags with a bulk material and then closes.

In a preferred embodiment of the invention, the treatment body comprises a particular elongated and preferably approximately strip-shaped body. Preferably, the body extends over a substantial portion of the width of the bag. The length of the main body can correspond approximately to the width of the bag and preferably extends over a proportion of between about 50% and almost 100% of the width of the bag.

Preferably, an immersion unit for immersion in the headspace of an open bag is provided approximately in the middle of the particular strip-shaped base body. The immersion unit can be designed, for example, as a dip-in sword and protrude in the intended use of the strip-shaped base body down. The length of the immersion unit is in particular smaller the length of the main body. In particular, the length of the immersion unit is approximately in a range between 5% and 75% of the length of the base body and preferably in a range between 20% and 50% of the length of the base body. The length of the immersion unit is z. B. between 5% and 50% of the width of the bags to be closed.

The treatment body may in particular consist of the strip-shaped main body and the immersion unit. Further, a guide member or the like may be disposed on the treatment body to transfer the treatment body from the rest position to the treatment position and back.

In an advantageous development, the suction device is formed on the immersion unit and comprises at least one suction channel. In particular, at least one suction channel opens in a region of the (lower) tip of the immersion unit so as to be located in the treatment position at the lowermost position.

Preferably, the dipping unit has an elongated cross-section which tapers towards the ends, so that a fold-free application of the bag around the dipping unit is possible. For sucking the air from the headspace of the bag, the immersion unit is introduced into the headspace, wherein the upper bag wall applies to the outside of the immersion unit and is held there by suitable means. As a result, only the immersion unit is introduced into the bag, at the lower end of the suction channel opens.

In all embodiments, the cleaning device preferably comprises a plurality of cleaning nozzles. In particular, the cleaning nozzles are provided on the elongated and in particular strip-shaped base body and serve to clean the upper inner bag wall, in particular to allow a reliable closing of the bag opening. Some of the cleaning nozzles are in particular provided as in particular lateral cleaning nozzles and some as lower cleaning nozzles to blow cleaning air to the side or down. The cleaning nozzles preferably surround the suction channel or the suction channels in the radial direction.

For cleaning, the cleaning nozzles are exposed to air and blow air onto the part of the bag to be cleaned, namely in particular the upper inner bag wall in the region of the bag opening.

Advantageously, the cleaning nozzles are aligned to the sides and downwards. For this purpose, the cleaning nozzles are preferably aligned on the elongated and in particular strip-shaped base body downwards, while they are provided on the immersion unit only at the upper end in the vicinity of the strip-shaped base body and aligned there to the side.

In the treatment position, the laterally directed cleaning nozzles are not immersed in the headspace of the bag, but can blow air on the upper inner bag wall of the upper bag opening to clean them of product particles and so a reliable closing of the upper bag opening following the suction to allow the residual air.

The treatment device may comprise at least one clamping device for gripping and clamping the upper bag wall of the open bag. Furthermore, a closing device for closing the bag opening of the bag can be provided, which closes the bag directly after the extraction of air from the open bag by means of a suction device. This offers considerable advantages, since the bag does not have to be transported or re-gripped before closing, which ensures that no more air enters the bag and thus the position and shape of the bag are preserved. Wrinkling in the bag wall during transfer is avoided.

With such a treatment device, a reliable suction of the residual air from the headspace of the bag filled with a bulk material is made possible, while at the same time the upper bag wall of the bag is cleaned of product particles in order to allow a reliable closing of the bag.

Preferably, the clamping device comprises at least two terminal strips, each with two clamping units. In this case, the width of the clamping units or a spacing of the clamping units of each clamping strip is preferably variable. In particular, the clamping units of a terminal block are movable towards and away from each other.

Advantageously, each terminal strip comprises at least one suction unit, which is provided in a central region of the clamping device or the terminal strip between the two clamping units. The suction unit allows the suction of the bag wall, while the bag wall remains clamped simultaneously by the clamping units.

Preferably, a total of at least four suckers are provided, of which two are arranged opposite each other. The suction cups allow a defined suction of the bag wall in a central area, while at the same time the clamping units hold the bag.

The two clamping units of one or each clamping strip and the suction unit of the clamping strip are preferably coupled to one another in a movement-coupled manner. The coupling of the movement can e.g. take place via a pivot lever, so that a deflection of the movement takes place.

If e.g. As the vacuum units are moved towards the bag, the two clamping units of a clamping bar move away from each other along their connecting line, and as the vacuum units are moved away from the bag, the two clamping units of a clamping bar move toward each other along their connecting line. As a result, bag material is released in order to release an opening in the bag, through which the immersion unit can subsequently dip from above into the bag.

Alternatively, the clamping units may be simultaneously moved independently inwardly toward the nipple unit to allow controlled opening of the sack in a central area. In the defined opening, the common treatment device or the suction device of the treatment device can be introduced. The defined opening and the suction device are preferably adapted to each other in terms of size.

After immersing the immersion unit, the suction units are moved back to the bag in both terminal strips, which at the same time drive apart the clamping units of each terminal strip again. Thus, the bag wall is applied to the immersion unit and closes the upper bag opening tight. This ensures that the suction only sucks air from the headspace of the bag and not about air from the outside, which gets into the bag inside via leaks.

In all embodiments, a support device is preferably provided, which supports the bag at least in the treatment position. The support means may support the bag from below and / or from the side.

In particular, the support device raises the bag during the aspiration of the head air located above the product level in order to facilitate the suction process and to keep the vacuum necessary for suction low. As a result, the suction of product particles is effectively avoided.

The support means may for example be designed as a particular height-adjustable vibrating table or the like and not only support the bag, but also promote the venting of the bag by a vibration movement. A supporting device formed by a conveyor belt is also preferred, which removes the bag after the suction and optionally closed the bag.

In all embodiments, the treatment device takes over the filled bag from a transfer device, which for example has spreading and alignment jaws, which grab the bag and align the upper bag wall horizontally to ensure proper processing.

A closing station according to the invention has in particular a treatment device described above.

A closing station according to the invention for closing an open bag, in particular filled with a bulk material, can have a clamping device for gripping and clamping the upper bag wall of an open bag, as well as a closing device for closing the bag opening of the bag. At least one suction device for sucking air out of the open bag and at least one cleaning device for cleaning the upper bag wall in the region of the bag opening of the bag can be provided. The suction device and the cleaning device are provided on a common treatment device which is movable between a treatment position and a rest position, wherein the suction device is immersed in the treatment position in the head space of the bag to suck air from the headspace while the cleaning device remains outside.

The packing machine according to the invention comprises at least one filling member for filling bulk goods in open bags, wherein at least one treatment device is provided for treating an open bag filled with a bulk material, which comprises at least one suction device for sucking air out of the headspace of the open bag and at least one cleaning device for Cleaning the bag opening of the filled bag includes. In this case, the suction device and the cleaning device are arranged on a common treatment unit and in particular a common treatment body, wherein the treatment unit or the treatment body between a treatment position and at least one rest position is movable. The suction device is provided for this purpose in the treatment position in immerse the bag interior of the filled bag while the cleaning device remains at least substantially outside.

The inventive method is used to treat a filled with a bulk open bag. In the method, the upper bag wall of an open bag is grasped and in particular clamped with a clamping device and a suction device of a treatment device is introduced into the headspace of the bag and air is sucked out of the headspace of the bag while a cleaning device of the treatment device by means of cleaning air on the upper bag wall blows to clean the upper bag wall before closing.

By sucking the air only from the headspace of the bag effective suction is possible in which no or almost no material is sucked. This allows a very effective filling of the bags, while at the same time can be ensured by sucking the residual air from the headspace of the bag, a cuboidal shape of the filled bags without having to provide any post-venting.

In a preferred embodiment of the method, the upper bag wall is gripped by two clamping units which are moved towards each other, while in the middle between the clamping units suction open an insertion in the upper bag wall to introduce the suction device of the treatment device and bring the bag cleaning device to the upper bag wall, so that an effective suction and an effective cleaning of the upper bag wall is made possible.

Further advantages and possible applications of the present invention will become apparent from the description of an embodiment, which will now be explained with reference to the accompanying figures.

Fig. 1

eine Seitenansicht einer erfindungsgemäßen Behandlungseinrichtung in einer Ruheposition;

Fig. 2

eine Vorderansicht der Behandlungseinrichtung nach Fig. 1;

Fig. 3

eine Seitenansicht der Behandlungseinrichtung nach Fig. 1;

Fig. 4

eine Seitenansicht der Behandlungseinrichtung nach Fig. 1 mit der Behandlungseinrichtung in einer Behandlungsposition;

Fig. 5

eine Aufsicht auf die Klemmeinrichtung der Behandlungs- einrichtung nach Fig. 1 in einer Schließposition;

Fig. 6

eine Aufsicht auf die Klemmeinrichtung der Verschließ- station nach Fig. 1 in einer Entlüftungsposition;

Fig. 7

eine schematische perspektivische Ansicht der Behand- lungseinrichtung bei der Übernahme eines gefüllten Sacks;

Fig. 8

eine schematische perspektivische Ansicht der Behandlungseinrichtung mit einem übernommenen Sack;

Fig. 9

eine schematische perspektivische Ansicht der Behandlungseinrichtung mit der Absaugeinrichtung in einer Ruheposition; und

Fig. 10

eine schematische perspektivische Ansicht der Behandlungseinrichtung mit der Absaugeinrichtung in einer Behandlungsposition.

In the figures show:

Fig. 1

a side view of a treatment device according to the invention in a rest position;

Fig. 2

a front view of the treatment device according to Fig. 1 ;

Fig. 3

a side view of the treatment device according to Fig. 1 ;

Fig. 4

a side view of the treatment device according to Fig. 1 with the treatment device in a treatment position;

Fig. 5

a view of the clamping device of the treatment device according to Fig. 1 in a closed position;

Fig. 6

a view of the clamping device of the closing station according to Fig. 1 in a venting position;

Fig. 7

a schematic perspective view of the treatment device in the acquisition of a filled bag;

Fig. 8

a schematic perspective view of the treatment device with an inherited bag;

Fig. 9

a schematic perspective view of the treatment device with the suction device in a rest position; and

Fig. 10

a schematic perspective view of the treatment device with the suction device in a treatment position.

With reference to the Figures 1-10 An embodiment of a closing station 1 with a treatment device 10 will be explained below.

In Fig. 1 a closure station 1 with a treatment device 10 in a rest position 9 is shown. The filled with a bulk bag 3 has in its headspace 2 a certain proportion of air, which should be at least partially removed after the acquisition and before closing the bag 3.

At the closing station 1, the bag 3 is taken over, for example, by a filling station, not shown, to extract excess air from the head space 2 of the bag interior 11 above the product level 41, to clean the upper bag wall 25 and to close the bag 3, which is particularly due to welding done with the closing device 24. After sucking off the air from the head space 2, a transfer is not required before closing the bag 3, since a closing device 24 is provided at the closing station 1.

The treatment device 10 comprises the in Fig. 2 shown in a side view treatment body 7, which consists essentially of an elongated and here about strip-shaped base body 12 and a dipping unit 13, wherein the immersion unit 13 extends in a central region 14 of the base body 12 downwardly and from the elongate body 12 from projects. The treatment body 7 is moved by means of a traversing unit 19 between a treatment position 8 and a rest position 9.

The treatment device 10 comprises a suction device 4 and a cleaning device 5 on a common treatment body 7 or on a common treatment unit. The common treatment body 7 may be formed in one piece or consist of two or more interconnected parts, which together form a jointly movable unit. On the base body 12, the cleaning device 5 is provided, which is provided with a plurality of cleaning nozzles 20. The cleaning nozzles 20 are provided on the sides 21 of the strip-shaped basic body 12 as lateral cleaning nozzles 20a and on the underside 22 of the strip-shaped basic body 12 as lower cleaning nozzles 20b.

The lateral cleaning nozzles 20a are here formed on a cleaning projection 39, which is part of the base body 12 and from which the immersion unit 13 extends away.

The cleaning nozzles 20a provided on the side 21 serve to clean the upper inner bag wall 25 from the side, while the cleaning nozzles 20b on the lower side 22 blow air to the upper bag wall 25 from above in order to clean them.

In the treatment position 8, the immersion unit 13 dives into the sack opening 6. Although the cleaning approach 39 does not dive into the bag interior 11, but enters between the upper ends of the upper bag wall 25, so that the lateral cleaning nozzles 20 a, the upper inner bag walls 25 of product dust and the like clean when they are activated.

In particular, the gusset areas of the sacks 3 are also cleaned by the cleaning nozzles 20b provided on the underside 22.

By cleaning the upper bag wall 25, the closure zone 40 or welding zone of the bags 3 is freed of product, so that a reliable and permanent welding of the upper bag wall 25 is possible. An impairment of the seal by product particles is reliably avoided.

Furthermore, the treatment device 10 or the treatment body 7 also serves for the extraction of air from the head space 2 of a bag 3. For this purpose, the treatment body 7 dives with the immersion unit 13 in the head space 2 of a filled with a bulk bag 3 and sucks on the suction channel 16 at the lower tip 15, the existing air in the headspace 2 from. Since the suction channel 16 is not immersed in the product level, but only in the head space 2 of the bag 3, the suction of product from the head space 2 is reliably avoided. A support unit 38 supports the bag 3 and raises the bag 3 during the suction, so that the vacuum required for suction can be reduced, since not the entire bag weight must be kept by the suction device 4.

In order for the upper bag wall 25 to lie flat against the immersion unit 13 when the air is sucked out of the head space 2, the immersion unit 13 is designed in cross-section such that the ends 17 and 18 taper to a point.

In Fig. 3 the closing station 1 is shown with the treatment device 10 in the rest position 9. The clamping bars 26 and 27 have seized the bag 3 and open the bag 3 defined, so that the treatment body 7 of the in Fig. 3 illustrated rest position 9 in the in Fig. 4 illustrated treatment position 8 can be converted, in which the immersion unit 13 of the treatment body 7 is immersed in the head space 2 of the bag 3, there to suck the existing head air, while the cleaning device 5 simultaneously cleans the upper inner bag walls 25 by means of the immersed therebetween cleaning nozzles 20a which in particular blow air on the upper inner bag walls 25.

After sucking off the air from the head space 2 and cleaning the upper bag wall 25 with the cleaning device 5, the treatment body 7 is again transferred from the treatment position 8 to the rest position 9 and the immersion unit 13 is pulled out of the head space 2 of the bag 3. Following this, the upper bag wall 25 is closed with the closing device 24 and here in particular welded.

In the FIGS. 5 and 6 the clamping strips 26 and 27 are shown in the closed position 35 and in the suction position 36. In the closed position 35 are the terminal strips 26 and 27 of the clamping device 23 with the respective clamping units 28 and 29 to each other to hold the bag 3. The clamping units 28 and 29 have an outer distance 30 along their connecting line.

In order to open the bag 3, the upper bag wall 25 is pulled outwards by means of the suction unit or the sucker 31, so that the defined insertion opening 32 for the immersion unit 13 is made available. In this case, the cross section of the insertion opening 32 is adapted to the cross section of the immersion unit 13 so that an insertion of the immersion unit 13 in the head space 2 of the bag 3 is possible.

In the suction position 36, the clamping units 28 and 29 of the clamping strips 26 and 27 have been driven towards each other by the drive 34 along their connecting line, so that a slightly reduced distance 33 is present. With reference to the Fig. 7 - 10 The following explains how it works. In Fig. 7 is the acquisition of a new filled with bulk open bag 3 shown. The treatment body 7 with the suction device 4 and the cleaning device 5 is in the rest position 9. The clamping device 23 with the clamping strips 26 and 27 is still open and spaced from the upper bag wall.

In Fig. 8 the clamping strips 26 and 27 of the clamping device 23 are closed and hold the bag 3. The treatment body 7 with the suction device 4 and the cleaning device 5 is still in the rest position. 9

In Fig. 9 the state is shown when the suckers 31 have sucked in the upper bag wall 25 and have been moved outward via the drive 34 in order to form the bag opening 6. As a result, the forcibly coupled with the suckers 31 clamping units 28 and 29 of the terminal strips 26 and 27 were at the same time to each other drove, so that the outer distance was reduced to the distance 33.

The insertion opening 32 is adapted to the cross section of the immersion unit 13, so that after the transfer of the treatment body 7 from the rest position 9 into the treatment position 8, the immersion unit 13 with the tip 15 dips into the insertion opening 32.

Following this, with the drive 34, the suckers 31 are moved towards each other inwardly and the positively coupled clamping units 28 and 29 of the terminal strips 26 and 27 simultaneously move outwards away from each other. The clamping units 28 and 29 attach themselves to the immersion unit 13 tightly and close the upper bag opening 6 tightly. Via the suction channel 16 of the immersion unit 13, the excess air is sucked out of the head space 2 of the bag 3 above the product level 41.

After the air has been sucked out of the head space, the immersion unit 13 is moved back into the rest position 9 via the moving unit 19 and the bag 3 is closed or welded by means of the closing device 24, without a previous further transport taking place.

In all embodiments, the support means 38 supports the bag 3 when sucking the air from the head space 2 from below and raises the bag 3 in particular to support the suction and thus the suction vacuum can remain low.

LIST OF REFERENCE NUMBERS

1

closing station

2

headspace

3

bag

4

suction

5

cleaning device

6

blind opening

7

treatment body

8th

treatment position

9

rest position

10

treatment facility

11

bag inside

12

body

13

Immersion unit

14

Middle area

15

top

16

suction

17

The End

18

The End

19

traversing

20

cleaning nozzle

20a

lateral cleaning nozzle

20b

lower cleaning nozzle

21

page

22

bottom

23

clamper

24

closing

25

Upper bag wall

26

terminal block

27

terminal block

28

terminal unit

29

terminal unit

30

width

31

suction unit

32

insertion

33

width

34

drive

35

closed position

36

suction position

37

central area

38

support means

39

cleaning approach

40

closing zone

41

product mirror

Claims (15)

Treatment device (10) for treating an open bag (3) filled with a bulk material, comprising at least one suction device (4) for extracting air from the head space (2) of the open bag (3) and at least one cleaning device (5) for cleaning the bag opening (6) of the bag (3),
characterized,
that the suction device (4) and the
Cleaning device (5) on a common treatment body (7) are arranged, which between a treatment position (8) and a rest position (9) is movable, wherein the suction device (4) is provided for in the treatment position (8) in the bag interior (11 ) of the bag (3), while the cleaning device (5) remains at least substantially outside. Treatment device (10) according to claim 1, wherein the treatment body (7) comprises an elongate base body (12), on which a dipping unit (13) for immersion in the headspace (2) of an open bag (3) is provided approximately in the center, wherein preferably the suction device (4) is formed on the immersion unit (13) and comprises at least one suction channel (16) opening out in the region of the tip (15) of the immersion unit (13). Treatment device (10) according to claim 2, wherein the immersion unit (13) has an elongated cross-section which tapers towards the ends (17, 18) in order to allow a wrinkle-free application of the bag (3). Treatment device (10) according to at least one of the preceding claims 2 to 3, wherein the cleaning device (5) comprises a plurality of cleaning nozzles (20), which are provided in particular on the strip-shaped main body (12), wherein preferably the cleaning nozzles (20) are aligned to the sides (21) and downwards and / or in particular lateral cleaning nozzles (20a) and lower cleaning nozzles (20b ) are provided. Treatment device (10) according to at least one of the preceding claims, wherein a clamping device (23) for gripping and clamping the upper bag wall (25) of an open bag (3), as well as a closing device (24) for closing the bag opening (6) of the bag ( 3) is provided. Treatment device (10) according to at least one of the preceding claims, wherein the clamping device (23) comprises at least two clamping strips (26, 27) each having two clamping units (28, 29). Treatment device (10) according to at least one of the preceding claims, wherein a distance (30) of the clamping units (28, 29) is variable. Treatment device (10) according to at least one of the preceding claims, wherein each clamping strip (26, 27) comprises at least one suction unit (31) provided in a central region (37) of the clamping device (23) between the two clamping units (28, 29) is. Treatment device (10) according to at least one of the preceding claims, wherein the two clamping units (28, 29) of a clamping strip (26, 27) and the suction unit (31) are motion-coupled, wherein preferably the two clamping units (28, 29) of a terminal strip ( 26, 27) during the movement of the suction units (31) of the two Move terminal strips (26, 27) toward and away from each other. Treatment device (10) according to at least one of the preceding claims, wherein a support means (38) is provided, which supports the bag (3) at least in the treatment position (8). Treatment device (10) according to the preceding claim, wherein the support means (38) raises the bag (3) during aspiration. Closing station (1) for closing an open bag (3) filled in particular with a bulk material, comprising at least one treatment device (10) according to at least one of the preceding claims. Packing machine with at least one filling element for filling bulk materials into open sacks, wherein at least one treatment device (10) is provided for treating an open sack (3) filled with a bulk material, which at least one suction device (4) for sucking air out of the headspace (2) of the open bag (3) and at least one cleaning device (5) for cleaning the bag opening (6) of the filled bag (3),
characterized,
that the suction device (4) and the
Cleaning device (5) on a common treatment body (7) are arranged, which between a treatment position (8) and a rest position (9) is movable, wherein the suction device (4) is provided for in the treatment position (8) in the bag interior ( 11) of the bag (3), while the cleaning device (5) remains at least substantially outside. Method for treating an open bag (3) filled with a bulk material, in which an upper bag wall (25) of an open bag (3) is grasped and clamped and in which a suction device (4) of a treatment device (10) is introduced into the head space (2 ) of the bag (3) and sucked air from the head space (2), while a cleaning device (5) of the treatment device (10) by means of cleaning nozzles (20) air on the upper inner bag wall (25) in the region of the later closure zone (40) blows to clean the upper inner bag wall (25) before closing. Method according to the preceding claim, wherein the upper bag wall (25) by two clamping units (28, 29) is moved towards each other, while approximately midway between the clamping units suction (31) has an insertion opening (32) in the upper bag wall ( 25) to introduce the suction device (4) of the treatment device (10) and bring the cleaning device (5) to the upper inner bag wall (25).

Images