DE102008014489A1 - Treatment device and method for treating an open bag filled with a bulk material - 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 The present invention relates to a treatment device and a Process for treating a particular with a bulk material filled open sacks, the sack in particular with a filled powdery or powdery dusty product is and is closed at a capping station.

It In the prior art, devices and methods for filling are known of bulk materials in open sacks known become, after the filling for example by a Welding process are welded to the bag close tightly.

Open Sacks are often made of plastic film, which protect the bag contents from moisture. Amongst other things therefore, increasingly building materials such as cement filled into open sacks made of plastic film. These offer the significant advantage of being on the job site usually not need to be protected from rain.

To the Transport and storage of such filled with cement, for example Bags continue to be of considerable advantage when the Sacks take a cuboid shape, since they are then simply stackable and are palettierfähig.

At the Fill the open bags with the bulk material At the same time, air also gets into the bag. To vent the bag, For example, vibrating devices are used, the before closing the bag for compaction and vent the product. Nevertheless, it still remains a residual air content in the filled sacks, which subsequently z. B. is partially pressed out in a press line to to ensure better stackability of the bags.

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

In front In the background of the prior art, it is the object of the present invention Invention, a treatment device and a capping station, and a method of treating a filled open To provide sacks, thus providing effective ventilation a filled open bag is made possible.

These Task is solved by a treatment facility with the features of claim 1. An inventive Packing machine is the subject of claim 16. The inventive Method is the subject of claim 17. Preferred developments The invention are the subject of the respective subclaims. Further advantageous features and embodiments of the invention are represented in the embodiment.

The Treatment device according to the invention for treatment from an open one filled with bulk material Sack comprises at least one suction device for the suction of Air from the headspace of the open bag and at least one cleaning device for cleaning the bag opening of the bag. Here are the Suction device and the cleaning device to a common Treatment unit or a common treatment body arranged. The treatment body is between at least a treatment position and at least one rest position movable. The suction device is intended to be in the treatment position immerse in the headspace of the bag while the cleaning device at least essentially and in particular completely outside the bag interior remains.

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

Thereby, that the suction device of the treatment device in the headspace and in particular only in the headspace of the bag above the Submerged product level or Füllgutspiegels, is a effective and fast suction allows, while the Vacuuming of bottled product reliably avoided becomes.

The Treatment device according to the invention allowed a drastic reduction of remaining in the filled bag Residual air, wherein the residual air in the bag in particular reduced is that to dispense with a downstream pressing line can. This means in particular that from the headspace of the filled Sacks discharged air volume preferably about the typical in corresponds to a residual pressure compressed air volume, so dispensed with a separate compression of the bags can be. This makes it possible to have fewer ventilation channels to provide from the bag interior to the bag exterior or even to give up altogether, reducing the risk of entry is further reduced by moisture.

Furthermore increases the palletizing ability of the invention treated Bags.

Possible and it is also preferred that the treatment device in a Packing machine is used, consisting of a continuous film web make open bags and then open these bags filled with the bulk material before using the inventive Treatment device to be treated, whereupon the open bags closed for example by a welding process become.

At It should be noted that the treatment facility Part of a packing machine can be the pre-assembled open Bags filled with a bulk material and then closes.

In a preferred embodiment of the invention comprises the treatment body a particular elongated and preferably approximately strip-shaped Body.

Preferably is approximately in the middle of the particular strip-shaped body an immersion unit for immersion in the headspace of an open Sacks provided. The immersion unit can, for example, as a dip sword be trained and used as intended Condition of the strip-shaped body protrude down.

Of the Treatment body can in particular from the strip-shaped Body and the immersion unit exist. Furthermore can on the treatment body a guide part or the like may be arranged to the treatment body of the resting position in the treatment position and back to convict.

In an advantageous development is the suction on the Immersion unit formed and includes at least one suction channel. In particular, at least one suction channel opens in one Area of the (lower) tip of the immersion unit, so as to be in the treatment position to be arranged at the lowest position.

Preferably the immersion unit has an elongated and to the ends towards pointed cross-section, so that a wrinkle-free application of the bag around the immersion unit is possible. To the Aspirating the air from the headspace of the bag becomes the immersion unit introduced into the headspace, with the upper bag wall on the outside of the immersion unit creates and over there appropriate resources. This will only the immersion unit inserted into the bag, at the lower end of the suction channel empties.

In In all embodiments, the cleaning device preferably comprises a plurality of cleaning nozzles. In particular, the Cleaning nozzles on the elongated and in particular provided strip-shaped body and serve for cleaning the upper inner bag wall, in particular a reliable closing of the bag opening to enable. Some of the cleaning nozzles are in particular as in particular lateral cleaning nozzles and some provided as lower Reinigungsdü sen to cleaning air to blow to the side or down.

to Cleaning, the cleaning nozzles are exposed to air and blow air on 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 on the elongated and in particular strip-shaped body after Aligned below while at the immersion unit only at the upper end near the strip-shaped Provided basic body and aligned there to the side are.

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

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 may be provided for closing the bag opening of the bag, which after the suction of air from the open bag by means of a suction device directly closes the bag. This offers considerable advantages since the bag does not need to be further transported or re-gripped before closing, thus ensuring that no more air enters the bag and thus preserving the position and shape of the bag. Wrinkling in the bag wall during transfer is avoided.

With Such a treatment device becomes a reliable one Aspirate the residual air from the headspace of the with a bulk material allows filled sacks while at the same time the top bag wall of the bag is cleaned of product particles, to reliably close the bag enable.

Preferably the clamping device comprises at least two terminal strips each with two clamping units. The width of the clamping units or a distance of the clamping units of each terminal strips preferably changeable. In particular, the clamping units of a terminal block to each other movable towards and away from each other.

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

Preferably a total of at least four suckers are provided, each of which two are arranged opposite one another. About the Sucker is a defined suction of the bag wall in a central Range while at the same time the clamping units hold the sack.

Preferably are the two clamping units of a or each terminal block and the Suction unit of the terminal block motion-coupled with each other. The Coupling of the movement can z. B. via a pivot lever done so that a deflection of the movement takes place.

If z. B. the vacuum units are moved to the bag, move the two clamping units of a terminal strip along its connecting line away from each other and when the suction unit moves away from the bag be moved, move the two clamping units of a terminal strip along their connecting line towards each other. This will be bag material Released to release an opening in the bag, through then the dipping unit from above into the bag can dive.

alternative In addition, the clamping units can be independent at the same time inward toward the suction unit to be moved to a controlled opening of the bag in a central To allow area. Into the defined opening can the common treatment device or the suction device the treatment device are introduced. The defined opening and the suction means are preferably sized adapted to each other.

To the immersion of the immersion unit are at both terminal strips the suction units moved back to the bag, which at the same time move apart the clamping units of each terminal strip again. Thus, the bag wall attaches to the immersion unit and closes the upper sack opening tight. This will ensure that the suction device sucks only air from the headspace of the bag and not about air from the outside, about leaks gets into the bag inside.

In all embodiments is preferably a support device provided, which the bag at least in the treatment position supports. The support device can remove the sack from support down and / or from the side.

Especially raises the support means the bag in the suction of the located above the product level head air to the To facilitate the suction process and the suction necessary To keep negative pressure low. This will also suck the Product particles effectively avoided.

The Support means, for example, as in particular height-adjustable Vibrating table or the like may be formed and the bag not only support, but the ventilation of the Also promote sacks by a vibratory motion. A by a conveyor belt formed support means is also preferred, which after the suction and an optionally carried out Closing the bag removes the bag.

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

A inventive closing station 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, may 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 head space, while the cleaning device remains outside.

The Packing machine according to the invention comprises at least a filling device for filling bulk materials in open bags, wherein at least one treatment device for treating a filled with a bulk material open bag is provided, which at least one suction device for sucking air from the headspace of the open bag and at least a cleaning device for cleaning the bag opening of the filled bag. In this case, the suction device and the cleaning device at a common treatment unit and in particular arranged a common treatment body, wherein the treatment unit or the treatment body between a treatment position and at least one rest position movable is. The suction device is provided for in the Treatment position in the bag interior of the filled bag immerse while the cleaning device at least remains essentially outside.

The inventive method is used for treating an open bag filled with a bulk material. In the method, the upper bag wall of an open bag taken and in particular clamped with a clamping device and it is a suction device of a treatment device in the Headspace of the sack is introduced and it gets air from the headspace sucked off the bag during a cleaning device the treatment device by means of cleaning nozzles air blows on the top bag wall to the top bag wall clean before closing.

By Sucking the air only from the headspace of the sack becomes an effective Suction allows, sucked at the no or almost no material becomes. This allows a very effective filling of the bags, while at the same time by the suction of the residual air the headspace of the bag a cuboid shape of the filled Sacks can be guaranteed without any Having to provide after-venting.

In A preferred embodiment of the method is the upper bag wall gripped by two clamping units which are moved towards each other, while in the middle between the clamping units suckers a Opening the insertion opening 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 effective suction and effective cleaning of the upper bag wall is enabled.

Further Advantages and applications of the present invention result from the description of an embodiment, which will now be explained with reference to the accompanying figures.

In show the figures:

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

2 a front view of the treatment device according to 1 ;

3 a side view of the treatment device according to 1 ;

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

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

6 a view of the clamping device of the closing after 1 in a venting position;

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

8th a schematic perspective view of the treatment device with an inherited bag;

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

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

With reference to the 1 - 10 is an embodiment of a closing station below 1 with a treatment facility 10 explained.

In 1 is a closing station 1 with a treatment facility 10 in a resting position 9 shown. The bag filled with a bulk material 3 points in his headspace 2 a certain amount of air after the takeover and before closing the bag 3 at least partially removed.

At the capping station 1 For example, the bag is taken over by a filling station, not shown, from the headspace 2 of the bag interior 11 above the product level 41 to suck off excess air, the upper bag wall 25 to clean and close the bag, which in particular by welding with the closing device 24 he follows. After sucking the air from the headspace, a transfer is not required before closing the bag, as a closing device 24 at the closing station 1 is provided.

The treatment facility 10 includes the in 2 in a side view illustrated treatment body 7 , which consists essentially of an elongated and here about strip-shaped body 12 and a dip unit 13 exists, wherein the immersion unit 13 in a central area 14 from the main body 12 from extending downwards and from the elongated body 12 protrudes from. The treatment body 7 is by means of a track 19 between a treatment position 8th and a resting position 9 method.

The treatment facility 10 includes a suction device 4 and a cleaning device 5 on a common treatment body 7 or at a common treatment center. The common body of treatment 7 may be formed in one piece or consist of two or more interconnected parts, which together form a jointly movable unit.

At the base body 12 is the cleaning device 5 provided with a variety of cleaning nozzles 20 is provided. The cleaning nozzles 20 are on the pages 21 of the strip-shaped basic body 12 as lateral cleaning nozzles 20a and on the bottom 22 of the strip-shaped basic body 12 as lower cleaning nozzles 20b intended.

The lateral cleaning nozzles 20a are here at a cleaning approach 39 trained, the part of the body 12 is and from which the immersion unit extends away.

The on the side 21 provided cleaning nozzles 20a serve to clean the upper inner bag wall 25 from the side while the cleaning nozzles 20b on the bottom 22 the upper bag wall 25 blow air from above to clean it.

In the treatment position 8th dives the immersion unit 13 in the sack opening 6 one. The cleaning approach 39 does not dive into the bag inside 11 but enters between the upper ends of the upper bag wall 25 so that the side cleaning nozzles 20a the upper inner bag walls 25 from product dust and the like when activated.

In particular, by the on the bottom 22 provided cleaning nozzles 20b also the gusseted areas of the sacks 3 cleaned.

By cleaning the upper bag wall 25 becomes the lock zone 40 or welding zone of the sacks 3 freed of product, allowing a reliable and permanent welding of the top bag wall 25 is possible. An impairment of the seal by product particles is reliably avoided.

Furthermore, the treatment device is used 10 or the treatment body 7 also the extraction of air from the headspace 2 a sack 3 , For this, the treatment body dives 7 with the immersion unit 13 in the headspace 2 a bag filled with a bulk material 3 and sucks over the suction channel 16 at the bottom tip 15 the headroom 2 available air. Because the suction channel 16 not immersed in the product level, but only in the headspace 2 of the sack 3 It reliably removes product from the headspace 2 avoided. A support unit 38 supports the bag 3 and lift the bag 3 during suction, so that the vacuum required for suction can be reduced, since not the entire bag weight must be held by the suction device.

So that the upper bag wall 25 while sucking the air from the headspace 2 smooth to the immersion unit 13 is the immersion unit 13 in cross section designed so that the ends 17 and 18 tapering.

In 3 is the closing station 1 with the treatment facility 10 in the resting position 9 shown. The terminal strips 26 and 27 have the bag 3 grabbed and opened the bag 3 defined so that the treatment body 7 from the in 3 illustrated rest position 9 in the in 4 illustrated treatment position 8th can be transferred, in which the immersion unit 13 of the treatment body 7 in the headspace 2 of the sack 3 is immersed to there aspirate the existing head air while the cleaning device 5 at the same time the upper inner bag walls 25 by means of the immersed in between cleaning nozzles 20a cleans the particular air on the upper inner bag walls 25 blow.

After aspirating the air from the headspace 2 and cleaning the top bag wall 25 with the cleaning device 5 becomes the treatment body 7 again from the treatment position 8th in the resting position 9 transferred and the immersion unit 13 gets out of the headspace 2 of the sack 3 pulled out. Following this, with the closing device 24 the upper bag wall 25 closed and in particular welded here.

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

To the bag 3 to open, the top bag wall 25 by means of the suckers 31 pulled outwards so that the defined insertion opening 32 for the immersion unit 13 is made available. Here is the cross section of the insertion 32 to the cross section of the immersion unit 13 adjusted so that an insertion of the immersion unit 13 in the headspace 2 of the sack 3 is possible.

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

In 8th are the terminal strips 26 and 27 the clamping device 23 closed and hold the bag 3 , The treatment body 7 with the suction device 4 and the cleaning device 5 is still in the resting position 9 ,

In 9 the condition is shown when the suckers 31 the upper bag wall 25 sucked in and over the drive 34 were driven out to the bag opening 6 to build. This has been done with the suckers 31 positively coupled clamping units 28 and 29 the terminal strips 26 and 27 simultaneously moved towards each other, so that the outer distance to the distance 33 was reduced.

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 resting position 9 in the treatment position 8th the immersion unit 13 with the top 15 in the insertion opening 32 dips.

Following this will be with the drive 34 the suckers 31 moved towards each other and the positively coupled clamping units 28 and 29 the terminal strips 26 and 27 drive away from each other at the same time. The clamping units 28 and 29 lie down to the immersion unit 13 close and close the upper bag opening 6 tight. About the suction channel 16 the immersion unit 13 is the excess air from the headspace 2 of the sack 3 above the product level 41 aspirated.

After aspirating the air from the headspace becomes the immersion unit 13 over the track 19 back to the resting position 9 procedure and the bag 3 by means of the closing device 24 closed or welded, without a previous onward transport takes place.

In all embodiments, the support device supports 38 the bag 3 while sucking the air from the headspace 2 from below and lifts the bag 3 in particular to assist the suction and thus the suction vacuum can remain low.

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

central 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

centrally Area

38

support means

39

cleaning approach

40

closing zone

41

product mirror

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• DE 19541975 A1 [0007]

Claims (18)

Treatment facility ( 10 ) for treating an open bag filled with a bulk material ( 3 ), comprising at least one suction device ( 4 ) for sucking air from the headspace ( 2 ) of the open bag ( 3 ) and at least one cleaning device ( 5 ) for cleaning the bag opening ( 6 ) of the bag ( 3 ), characterized in that the suction device ( 4 ) and the cleaning device ( 5 ) on a common treatment body ( 7 ) arranged between a treatment position ( 8th ) and a resting position ( 9 ) is movable, wherein the suction device ( 4 ) is provided for in the treatment position ( 8th ) in the bag interior ( 11 ) of the bag ( 3 ) while the cleaning device ( 5 ) at least substantially remains outside. Treatment facility ( 10 ) according to claim 1, wherein the treatment body ( 7 ) an elongated body ( 12 ), at which approximately centrally a submerged unit ( 13 ) for immersion in the headspace ( 2 ) of an open bag ( 3 ) is provided. Treatment facility ( 10 ) according to claim 2, wherein the suction device ( 4 ) on the immersion unit ( 13 ) is formed and at least one in the region of the tip ( 15 ) of the immersion unit ( 13 ) opening suction channel ( 16 ). Treatment facility ( 10 ) according to at least one of the preceding claims 2 to 3, wherein the immersion unit ( 14 ) an elongated and to the ends ( 17 . 18 ) has pointed cross-section to a wrinkle-free application of the bag ( 3 ). Treatment facility ( 10 ) according to at least one of the preceding claims 2 to 4, wherein the cleaning device ( 5 ) a plurality of cleaning nozzles ( 20 ), which in particular on the strip-shaped base body ( 12 ) are provided. Treatment facility ( 10 ) according to the preceding claim, wherein the cleaning nozzles ( 20 ) to the pages ( 21 ) and down ( 22 ) and in particular lateral cleaning nozzles ( 20a ) and lower cleaning nozzles ( 20b ) are provided. Treatment facility ( 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 closure device ( 24 ) for closing the bag opening ( 6 ) of the bag ( 3 ) is provided. Treatment facility ( 10 ) according to at least one of the preceding claims, wherein the clamping device ( 23 ) at least two terminal strips ( 26 . 27 ) each with two clamping units ( 28 . 29 ). Treatment facility ( 10 ) according to at least one of the preceding claims, wherein a distance ( 30 ) of the clamping units ( 28 . 29 ) is changeable. Treatment facility ( 10 ) according to at least one of the preceding claims, wherein each terminal strip ( 26 . 27 ) at least one suction unit ( 31 ) located in a central area ( 37 ) of the clamping device ( 23 ) between the two clamping units ( 28 . 29 ) is provided. Treatment facility ( 10 ) according to at least one of the preceding claims, wherein the two clamping units ( 28 . 29 ) a terminal strip ( 26 . 27 ) and the suction unit ( 31 ) are motion coupled. Treatment facility ( 10 ) according to the preceding claim, wherein the two clamping units ( 28 . 29 ) a terminal strip ( 26 . 27 ) during the movement of the suction units ( 31 ) of the two terminal strips ( 26 . 27 ) move towards and away from each other. Treatment facility ( 10 ) according to at least one of the preceding claims, wherein a support device ( 38 ) is provided, which the bag ( 3 ) at least in the treatment position ( 8th ). Treatment facility ( 10 ) according to the preceding claim, wherein the support means ( 38 ) raises the bag at the suction. Closing station ( 1 ) for closing an open bag filled in particular with a bulk material ( 3 ) 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 goods into open sacks, wherein at least one treatment device ( 10 ) for treating an open bag filled with a bulk material ( 3 ) is provided, which at least one suction device ( 4 ) for sucking air from 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 in that the suction device ( 4 ) and the cleaning device ( 5 ) on a common treatment body ( 7 ) are arranged, which between a Behandlungspo position ( 8th ) and a resting position ( 9 ) is movable, wherein the suction device ( 4 ) is provided for in the treatment position ( 8th ) in the bag interior ( 11 ) of the bag ( 3 ) while the cleaning device ( 5 ) at least substantially remains outside. Process for treating an open bag filled with a bulk material ( 3 ), in which an upper bag wall ( 25 ) of an open bag ( 3 ) is grasped and clamped and in which a suction device ( 4 ) a treatment facility ( 10 ) in the headspace ( 2 ) of the bag ( 3 ) and air from the headspace ( 2 ) while a cleaning device ( 5 ) of the treatment facility ( 10 ) by means of cleaning nozzles ( 20 ) Air on the upper inner bag wall ( 25 ) in the area of the later closure zone to the upper inner bag wall ( 25 ) to clean before closing. Method according to the preceding claim, wherein the upper bag wall ( 25 ) by two clamping units ( 28 . 29 ), which are moved towards each other, while approximately centrally between the clamping units suckers ( 31 ) an insertion opening ( 32 ) in the upper bag wall ( 25 ) to open the suction device ( 4 ) of the treatment facility ( 10 ) and the cleaning device ( 5 ) to the upper inner bag wall ( 25 ) introduce.