ES2371594T3 - TREATMENT AND PROCEDURE DEVICE FOR THE TREATMENT OF AN OPEN SACK FILLED WITH A BULK PRODUCT. - 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

Treatment device and procedure for the treatment of an open bag filled with a bulk product.

The present invention relates to a treatment device and a method for the treatment particularly of an open bag filled with a bulk product, wherein the bag is particularly filled with a product in the form of powder or dusty, and which is closed in A closed station.

Devices and procedures for filling bulk products in open bags have been disclosed in the state of the art, which are welded, for example, after filling by a welding process, to close the bag tightly.

Open bags are often made of plastic sheets, which protect the contents of the bag from moisture. For this reason, among others, more and more construction materials such as cement are filled in open sacks of plastic sheets. These offer the considerable advantage that it is generally not necessary to protect them from rain on site.

For the transport and storage of this type of bags filled with, for example, cement, it is also a substantial advantage if the bags adopt a parallelepipedic form, since in this way they can be easily stacked and are capable of being palletized.

When filling the open bags with the bulk product, air also enters the bag at the same time. To deaerate the bag, vibrating devices are used, for example, which provide compaction and deaeration of the product before closing the bag. Despite this, there is still a part of residual air in the filled bags, which, for example, is partially expelled by pressure in a pressing path, to provide a better capacity for stacking the bags.

In order for the air still contained in the bag to be able to escape in the pressing path, air channels are provided in the walls of the bag, through which a part of the air still contained escapes when the pressing pressure is applied. However, not only can these air escape from the inside of the bag to the outside, but in unfavorable cases it can also lead to moisture entering from the outside in the bag, which can cause the product to rot In addition to this, the product can also go outside.

In order to eliminate the air still contained in the bag, a procedure and a device for forming and deaerating open bags have been disclosed through document DE19541975A1 after the filling process, where the upper edges of the protrusions of the walls of the bag they are tensioned slidably with clamping jaws, and where the clamping jaws are tacked, once the filling is completed, in the direction of the level of bulk product existing in the bag, to expel the air contained in the bag to through a lance introduced into the product through the top opening of the bag and can be requested by vacuum. A drawback in the known device is the fact that not only air is extracted through the lance introduced into the bag but also bulk product.

Through document WO2005 / 118415A2, a method for filling open bags with powder-shaped material has been disclosed, in which the bag is first formed and a first lower end is closed. After filling and before closing the bag, a suction device is introduced from the top at a lateral end of the bag into the bag and the remaining air is drawn from the bag. In addition, a mobile cleaning device is moved to one side and to another along the upper opening of the bag from one side to the other, to clean the upper inner edge of the bag by means of the cleaning device with a jet of air during movement to one side and the other, which should remove particles. However, in this known state of the art, the significant cost of the suction device that is immersed in the bag and of the additional cleaning device is inconvenient. Both the suction device and the cleaning device must be moved to the bag each time. In addition, it is necessary to automatically move the cleaning device to one side and the other along the upper edge.

Through document US4,262,708 a procedure and a device for the treatment of flexible containers in the form of sacks have been disclosed before closing the container, where a superheated steam is introduced inside the container, to remove the air content inside. The steam is introduced through a nozzle, where the products introduced into the container, such as, for example, roast sauces or pieces of meat are not affected by the steam used for cleaning. The procedure cannot be used in moisture sensitive products, or a drying process should be developed below.

Based on the state of the art, the object of the present invention is to make available a treatment device and a closing station, as well as a procedure for the treatment of a bag filled with a bulk product, by means of which an effective deaeration and reliable closure of a full open bag is possible. In particular, the cost of this must be less than in the prior art.

This objective is solved by a treatment device with the characteristics of claim 1. A packaging machine according to the invention is the subject of claim 12. The method according to the invention is the subject of claim 13. Preferred refinements of the The invention is the subject of the corresponding dependent claims. Other advantageous features and conformations of the invention are represented in the exemplary embodiment.

The treatment device according to the invention for the treatment of an open bag filled with a bulk product comprises at least one suction device for the aspiration of air from the upper space of the open bag and at least one cleaning device for cleaning the sack opening of the sack. For this, the suction device and the cleaning device are arranged in a common treatment unit or in a common treatment body. The treatment body can be moved between at least one treatment position and at least one resting position. The suction device is intended to be immersed in the upper space of the bag in the treatment position, while the cleaning device remains substantially and particularly completely outside the interior of the bag. A clamping device is provided to catch and tighten the upper wall of the bag from an open bag. The clamping device comprises at least two clamping bars with two clamping units each. Each tightening bar comprises at least one suction unit that is provided between the two tightening units.

The treatment device according to the invention offers many advantages. A substantial advantage is that it is possible at the same time an aspiration of the residual air contained in the volume of the bag and a cleaning of the wall of the bag in the area of the upper opening of the bag. This allows faster and more efficient treatment of the bags.

By means of the common treatment unit or the aspiration device provided in a common treatment body and the cleaning device also provided therein, it is possible with just one movement to clean the inside of the upper edge of the bag, while at the same time aspirating excess air On the other hand, in the state of the art mentioned, each unit must be introduced separately into the upper opening of the bag. Instead, according to the invention, the common treatment body is submerged with a single movement in the upper opening of the bag. This represents a remarkable simplification. Only one drive is needed, for example.

Also, in the state of the art it is necessary to exclude the possibility of collision between the different devices, while the cleaning device moves from one side of the bag to the other. In accordance with the invention, such coordination of the movements of two independent devices is not necessary, thereby reducing the cost again.

The fact that the suction device of the treatment device is immersed in the upper space and thus particularly only in the upper space of the bag above the level of the product or the level of the bulk product makes effective aspiration possible. and fast, where the aspiration of filled product is reliably avoided.

The treatment device according to the invention allows a drastic reduction of the residual air remaining in the filled bag, where the residual air is reduced in the bag particularly to such an extent that a pressing path to be carried out can then be relinquished. . This particularly means that the volume of air extracted from the upper space of the filled bag preferably corresponds approximately to the volume of residual air typically expelled under pressure in a pressing path, so that a pressing can be waived separately from the sacks In this way it is possible to provide less deaeration channels from the inside of the bag to the outside of the bag, or even renounce them completely, thereby reducing the danger of moisture ingress even further. In addition, the palletizing capacity of the bags treated in accordance with the invention increases.

It is also possible and preferred that the treatment device is used in a packaging machine, which manufactures open bags from a continuous strip of foil and then fills these open bags with the bulk product, before being treated with the device. of treatment according to the invention, following which the open bags are closed, for example, by a welding process.

At this point it is desired to draw attention to the fact that the treatment device can be part of a packaging machine, which fills the previously made open sacks with a bulk product and then closes them.

In a preferred development of the invention, the treatment body comprises a particularly stretched base body and preferably in the form of a slat. The base body preferably extends along a considerable proportion of the width of the bag. The length of the base body can correspond approximately to the width of the bag and preferably extends over a proportion between about 50% and barely 100% of the bag width.

Preferably, an immersion unit is provided approximately in the center of the base body, particularly in the form of a lath, to be immersed in the upper space of an open bag. The immersion unit can be shaped, for example, as an immersion sword and in the state in use according to its arrangement protruding down from the base body in the form of a ribbon. The length of the immersion unit is particularly shorter than the length of the base body. Particularly, the length of the immersion unit is approximately in the 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 body base. The length of the immersion unit is, for example, between 5% and 50% of the width of the bags to be closed.

The treatment body may be formed in particular by the slat-shaped base body and the immersion unit. In addition, a guiding element or the like can be arranged in the treatment body to bring the treatment body from the rest position to the treatment position and vice versa.

In an advantageous development, the suction device is formed in the immersion unit and comprises at least one suction channel. Particularly, at least one suction channel flows into an area of the (lower) tip of the immersion unit, so as to be disposed in the lower position in the treatment position.

Preferably, the immersion unit has a section stretched and finished pointed towards the ends, so that a fold-free support of the sack around the immersion unit is possible. For the aspiration of the air from the upper space of the bag, the immersion unit is introduced into the upper space, where the upper wall of the bag rests against the outer face of the immersion unit and is held there by suitable means. In this way, only the immersion unit is introduced into the bag, at whose lower end the suction channel ends.

In all conformations, the cleaning device preferably comprises a plurality of cleaning nozzles. Particularly the cleaning nozzles are provided in the stretched base body and particularly in the form of a slat and serve to clean the inner upper wall of the sack, in particular to allow reliable closure of the sack opening. Some of the cleaning nozzles are particularly provided as lateral cleaning nozzles and some as lower cleaning nozzles, for blowing the cleaning air sideways or downwards. Preferably, the cleaning nozzles surround the suction channel or the suction channels in the radial direction.

For cleaning, the cleaning nozzles are requested with air, and they blow air towards the part to be cleaned from the bag, specifically the inner upper wall of the bag in the area of the opening of the bag.

Advantageously, the cleaning nozzles are oriented sideways and downwards. For this, the cleaning nozzles are preferably oriented downwards in the stretched base body and particularly in the form of a slat, while in the immersion unit they are only provided at the upper end in the vicinity of the base body in the form of a slat. and they are there oriented to the side.

In the treatment position, the side-oriented cleaning nozzles are not submerged to the upper area of the bag, but can blow air over the inner upper wall of the bag from the upper opening of the bag, to clean it of product particles and thus allow a reliable closure of the upper opening of the bag following the aspiration of residual air.

The treatment device comprises at least one clamping device for holding and tightening the upper bag wall of the open bag. Likewise, a closing device can be provided to close the sack opening of the sack, which closes the sack directly after the aspiration of air from the open sack by means of a suction device. This offers substantial advantages, since it is not necessary to subsequently transport or reattach the bag before closing, which ensures that no more air penetrates into the bag and thus the position and shape of the bag is preserved. The formation of folds in the wall of the bag during the transfer is avoided.

By means of such a treatment device, a reliable aspiration of the residual air from the upper space of the bag filled with a bulk product is made possible, while at the same time the upper wall of the bag of product particles is cleaned, to allow a closure Reliable sack.

The clamping device comprises at least two clamping bars with two clamping units each. In it, the width of the clamping units or a separation distance between the clamping units of each of the clamping bars can preferably be modified. In particular, the tightening units of a tightening bar can be moved to bring them closer or apart from each other.

Advantageously, the suction unit is provided in a central area of the clamping device or the clamping bar, approximately in the center between the two clamping units. The suction unit allows aspiration of the wall of the bag, while the wall of the bag remains at the same time held by the clamping units.

Preferably at least a total of four vacuum cleaners are provided, of which two are respectively arranged in opposite positions. By means of the vacuum cleaners a defined aspiration of the wall of the bag in a central area is possible, while the clamping units hold the bag at the same time.

Preferably, the two clamping units of one or each of the clamping bars and the suction unit of the clamping bar are coupled to each other in their movement. The coupling of the movement can be carried out, for example, by means of a rotating lever, in such a way that a change in direction of movement occurs.

When, for example, the suction units are moved towards the bag, the two clamping units of one of the clamping bars move along their joint line separating each other, and when the aspiration units are removed from the sack, the two clamping units of one of the clamping bars move along its joint line approaching each other. In this way bag material is released, to free an opening in the bag, through which the immersion unit can then be submerged from above in the bag.

Alternatively, the tightening units can be moved independently inwardly in the direction of the aspiration unit, to allow controlled opening of the bag in a central area. In the defined opening, the common treatment device or the aspiration device of the treatment device can be introduced. The defined opening and the suction device are preferably adapted to each other in their dimensions.

After the immersion of the immersion unit, the suction units in the two clamping bars are moved back to the bag, whereby at the same time the clamping units of each of the clamping bars are separated again . In this way, the wall of the bag rests on the immersion unit and closes the upper opening of the bag tightly. This ensures that the suction device only aspirates air from the upper space of the bag and not, for example, outside air that penetrates the inside of the bag through tightness.

In all the conformations a support device is preferably provided, which holds the bag at least in the treatment position. The support device can hold the bag from below and / or from the side.

In particular, the support device raises the bag during the aspiration of the upper air that is above the level of the product, to facilitate the aspiration process and to keep the negative pressure required for aspiration low. In this way the aspiration of product particles is also effectively avoided.

The support device may be shaped, for example, particularly as a vibrating table of adjustable height or the like, and not only support the bag, but also contribute to the deaeration of the bag also by a vibratory movement. A support device formed by a conveyor belt is also equally preferred, which transports the bag after aspiration and an eventual closure of the bag.

In all conformations, the treatment unit collects the bag filled with a delivery device, which has, for example, expansion and orientation jaws, which grip the bag and orient the top wall of the bag horizontally, to ensure a correct subsequent treatment.

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

A closing station according to the invention for closing an open bag filled particularly with a bulk product may have a clamping device for holding and tightening the upper wall of the bag of an open bag, as well as a closing device for the closure of the sack opening. At least one suction device may be provided to aspirate the air from the open bag and at least one cleaning device to clean the upper wall of the bag in the area of the bag opening. The suction device and the cleaning device are provided for this purpose in a common treatment device, which can be moved between a treatment position and a rest position, where the aspiration device is immersed in the treatment position in the upper space of the bag, to aspirate air from the upper space, while the cleaning device remains outside.

The packaging machine according to the invention comprises at least one filling member for filling bulk products in open bags, wherein at least one treatment device is provided for treating an open bag filled with a bulk product, comprising at least a suction device for sucking air from the upper space of the open bag and at least one cleaning device for cleaning the opening of the bag of the filled bag. A clamping device is provided for gripping and tightening the upper bag wall of an open bag, wherein the clamping device comprises at least two clamping bars with two clamping units each. Each tightening bar comprises at least one suction unit, which is provided in a central area of the tightening device between the two tightening units. For this, the suction device and the cleaning device are arranged in a common treatment unit and particularly in a common treatment body, where the treatment unit or the treatment body can be moved between a treatment position and the minus a resting position. The suction device is intended to be immersed in the treatment position inside the sack of the filled sack, while the cleaning device remains at least substantially outside.

The process according to the invention serves for the treatment of an open bag filled with a bulk product. In the process, the upper wall of the bag is seized from an open bag and is particularly tightened with a clamping device, and a suction device of a treatment device is introduced into the upper space of the bag and air is drawn from the upper space of the bag. bag, while a cleaning device of the treatment device blows air over the upper wall of the bag by means of cleaning nozzles, to clean the upper wall of the bag before closing. The upper wall of the bag is seized with at least two clamping bars with two clamping units each, which move towards each other, while between the clamping units some vacuum cleaners open an inlet hole in the upper wall of the bag, to introduce the suction device of the treatment device and bring the cleaning device closer to the upper inner wall of the bag.

By aspirating the air only from the upper space of the bag, an effective aspiration is made possible, in which nothing or practically no material is aspirated. This allows very efficient filling of the bags, while at the same time a parallelepiped conformation of the filled bags can be guaranteed by suction of residual air from the upper space of the bag, without having to prepare a possible subsequent deaeration.

In the procedure, the upper wall of the bag is seized by two clamping units, which move towards each other, while vacuum cleaners, preferably in the center between the clamping units, open an inlet hole in the upper wall of the bag , to introduce the suction device of the treatment device and bring the cleaning device closer to the upper wall of the bag, so that effective aspiration and effective cleaning of the upper wall of the bag is possible.

Other advantages and possibilities of application of the present invention are obtained from the description of an exemplary embodiment described below with reference to the attached figures.

The figures show:

fig. 1 a side view of a treatment device according to the invention in a resting position;

fig. 2 a front view of the treatment device according to fig. one;

fig. 3 a side view of the treatment device according to fig. one;

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

fig. 5 a top view of the tightening device of the treatment device according to fig. 1 in a closed position;

fig. 6 a top view of the clamping device of the closing station according to fig. 1 in a deaeration position;

fig. 7 a schematic perspective view of the treatment device at the reception of a full bag;

fig. 8 a schematic perspective view of the treatment device with a received bag;

fig. 9 a schematic perspective view of the treatment device with the aspiration device in a rest position; Y

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

An embodiment of a closing station 1 with a treatment device 10 is described below, with reference to Figures 1-10.

In fig. 1 represents a closing station 1 with a treatment device 10 in a rest position 9. The bag 3 filled with a bulk product has a certain proportion of air in its upper part 2, which must be removed at least partially after receipt and before closing the bag 3.

In the closing station 1, the bag 3 is received, for example, from a filling station not shown, in order to aspirate the excess air from the upper space 2 inside the bag 11 above the product level 41, clean the upper wall 25 of the bag and closing the bag 3, which is carried out particularly by welding by means of a welding device 24. After the air in the upper space 2 is aspirated, a transfer is not necessary before closing the bag 3, since the closing device 24 is provided at the closing station 1.

The treatment device 10 comprises the treatment body 7 shown in fig. 2 in a side view, which is substantially composed of a base body 12 stretched and here approximately in the form of a slat, and of an immersion unit 13, wherein the immersion unit 13 extends in a central area 14 from the body from base 12 down and protrudes from the stretched base body 12. The treatment body 7 is moved by a movement 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 in a common treatment body 7 or in a common treatment unit. The common treatment body 7 can be formed in a single piece or also be formed by two or more pieces joined together, which together form a jointly movable unit.

A cleaning device 5 is provided on the base body 12, which is provided with a plurality of cleaning nozzles 20. The cleaning nozzles 20 are provided on the sides 21 of the base body 12 in the form of a strip as a nozzle cleaning sides 20a and on the lower face 22 of the base body 12 in the form of a slat as a lower cleaning nozzle 20b.

The cleaning side nozzles 20a are here formed in a cleaning appendix 39, which is part of the base body 12, and from which the immersion unit 13 extends.

The cleaning nozzles 20a provided on the side 21 serve for cleaning from the side of the inner upper wall 25 of the bag, while the cleaning nozzles 20b of the lower face 22 blow the upper wall 25 of the bag from above with air, To clean this one.

In the treatment position 8, the immersion unit 13 is immersed in the bag opening 6 of the bag. Although the cleaning appendix 39 is not immersed in the interior 11 of the bag, it enters between the upper ends of the upper wall 25 of the bag, such that the cleaning side nozzles 20a clean the inner upper walls 25 of the dust bag of product and the like, when activated.

Particularly, the cleaning nozzles 20b provided on the underside 22 also clean the areas of lateral folds of the bags 3.

By cleaning the upper wall 25 of the bag, the closure zone 40 or welding zone of the bags 3 is released from the product, so that a reliable and permanent welding of the upper wall 25 of the bag is possible. An influence on the welding seam caused by product particles is reliably avoided.

In addition, the treatment device 10 or the treatment body 7 also serves for the aspiration of air from the top 2 of a sack 3. To this end, the treatment body 7 is submerged with the immersion unit 13 in the upper part 2 of a bag 3 filled with a bulk product, and aspirates the air existing in the upper part 2 through the suction channel 16 located in the lower tip 15. Since the suction channel 16 is not submerged in the product level, but only in the upper part 2 of the bag 3, the product aspiration of the upper part 2 is reliably avoided. A support unit 38 holds the bag 3 and raises the bag 3 during the aspiration, of such that the vacuum necessary during aspiration can be reduced, since it is not necessary for the aspiration device 4 to hold the entire weight of the bag.

In order for the upper wall 25 of the bag to rest flat against the immersion unit 13 during the aspiration of the air from the upper part 2, the immersion unit 13 is shaped in its section such that the ends 17 and 18 end on 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 raise the subject bag 3 and open the bag 3 in a defined manner, so that the treatment body 7 can be moved from the rest position 9 shown in fig. 3 to the treatment position 8 shown in fig. 4, in which the immersion unit 13 of the treatment body 7 is submerged in the upper space 2 of the bag 3, for there to aspirate the existing upper air, while the cleaning device 5 simultaneously cleans the inner upper walls 25 of the bag by means of cleaning nozzles 20a submerged between means, which particularly blow air on the inner upper walls 25 of the bag.

After aspiration of the air from the upper space 2 and the cleaning of the upper wall 25 of the bag with the cleaning device 5, the treatment body 7 is moved again from the treatment position 8 to the rest position 9, and the immersion unit 13 is thereby removed from the upper space 2 of the bag 3. Next, the upper wall 25 of the bag is closed by means of the closure device 24 and here it is particularly welded.

In fig. 5 and 6, the clamping bars 26 and 27 are shown in the closed position 35 and in the aspiration position 36. In the closed position 35, the clamping bars 26 and 27 of the clamping device 23 with the clamping units 28 and 29 corresponding are against each other, to hold the bag 3. The clamping units 28 and 29 have an external separation distance 30 along their joining line.

To open the bag 3, the upper wall 25 of the bag is removed outwardly by means of the suction unit or the vacuum cleaners 31, to make available the inlet opening 32 defined for the immersion unit 13. For this purpose, the section of the inlet opening 32 is adapted to the section of the immersion unit 13 such that an introduction of the immersion unit 13 into the upper space 2 of the bag 3 is possible.

In the suction position 36, the clamping units 28 and 29 of the clamping bars 26 and 27 have been moved along their joint line by means of the drive 34 to approximate each other, such that there is a distance of separation 33 somewhat smaller. The operation mode is described below with reference to fig. 7-10. In fig. 7 shows the reception of a new open bag 3 filled with a bulk material. 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 bars 26 and 27 is still open and separated from the upper wall of the bag .

In fig. 8, the clamping bars 26 and 27 of the clamping device 23 are closed and secured to 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 shows the state in which the vacuum cleaners 31 have aspirated the upper wall 25 of the bag and have moved outwardly by means of the drive 34, to form the bag opening 6. Thus, the clamping units 28 and 29 of the clamping bars 26 and 27 forcedly coupled with the vacuum cleaners 31, they moved at the same time towards each other, so that the outer separation distance has been reduced to the separation distance 33.

The inlet opening 32 is adapted to the section of the immersion unit 13, such that after the transport of the treatment body 7 from the rest position 9 to the treatment position 8, the immersion unit 13 is submerged with the tip 15 in the inlet opening 32.

Thereafter, by means of the drive 34, the vacuum cleaners 31 are moved towards each other inwards, and the clamping units 28 and 29 of the clamping bars 26 and 27 forcedly coupled, simultaneously move towards the outside moving away from each other. The clamping units 28 and 29 rest tightly against the immersion unit 13 and close the upper bag opening 6 of the bag tightly. Through the suction channel 16 of the immersion unit 13, the excess air from the upper space 2 of the bag 3 above the product level 41 is sucked.

After the aspiration of the air from the upper space, the displacement unit 19 returns the immersion unit 13 to the rest position 9, and the closing device 24 closes or welds the bag 3, without any previous transport taking place. .

In all the conformations, the support device 38 supports the bag 3 from below during the aspiration of the air from the upper space 2 and particularly elevates the bag 3, to support the aspiration and thus keep the aspiration vacuum reduced.

List of reference symbols:

closing station 2 upper space 3 bag 4 suction device

cleaning device 6 bag opening 7 treatment body 8 treatment position 9 resting position

treatment device 11 inside the bag 12 base body 13 immersion unit 14 central area

 tip 16 suction channel 17 end 18 end 19 travel unit

cleaning nozzle 20a lateral cleaning nozzle 20b lower cleaning nozzle 21 lateral 22 lower face 23 clamping device 24 closing device

upper wall of the bag 26 clamp bar 27 clamp bar 28 clamp unit 29 clamp unit

 width 31 suction unit 32 inlet opening 33 width 34 drive

closing position 36 suction position 37 central zone 38 support device 39 cleaning appendix

closing zone 41 product level

Claims (14)

one.

Treatment device (10) for the treatment of an open bag (3) filled with a bulk product, comprising at least one suction device (4) for the aspiration of air from the upper space (2) of the bag (3) open and at least one cleaning device (5) for cleaning the bag opening (6) of the bag (3), characterized in that a clamping device (23) is provided for fastening and tightening the upper wall (25 ) of the sack of an open bag (3), comprising at least two clamping bars (26, 27) with two clamping units (28, 29) each, where each clamping bar (26, 27) comprises the minus a suction unit (31), which is provided between the two clamping units (28, 29), and because the suction device (4) and the cleaning device (5) are arranged in a common treatment body ( 7), which can be moved between a treatment position (8) and a rest position (9), where the device The suction vo (4) is intended to be immersed inside the bag (11) of the bag (3) in the treatment position (8), while the cleaning device (5) remains at least substantially out.

2.

Treatment device (10) according to claim 1, wherein the treatment body (7) comprises a stretched base body (12), in which approximately one immersion unit (13) is provided in the center for immersion in the upper space (2) of an open sack (3), where preferably the suction device (4) is formed in the immersion unit (13) and comprises at least one suction channel (16) that flows into the area of the tip (15) of the immersion unit (13).

3.

Treatment device (10) according to claim 2, wherein the immersion unit (13) has a stretched section finished pointed towards the ends (17, 18), to allow support without folds of the bag (3).

Four.

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 particularly provided in the base body (12 ) in the form of a slat, where preferably the cleaning nozzles (20) are oriented towards the sides (21) and down and / or where particularly lateral cleaning nozzles (20a) and lower cleaning nozzles (20b) are provided .

5.

Treatment device (10) according to at least one of the preceding claims, wherein a closing device (24) for closing the bag opening (6) of the bag (3) is provided.

6.

Treatment device (10) according to at least one of the preceding claims, wherein a separation distance (30) between the clamping units (28, 29) can be varied.

7.

Treatment device (10) according to at least one of the preceding claims, wherein the suction unit (31) is provided in a central area (37) of the clamping device (23) between the two clamping units (28, 29 ).

8.

Treatment device (10) according to at least one of the preceding claims, wherein the two clamping units (28, 29) of a clamping bar (26, 27) and the suction unit (31) are coupled in motion, wherein preferably the two clamping units (28, 29) of a clamping bar (26, 27) are moved closer or further away with the movement of the suction units (31) of the two clamping bars (26, 27).

9.

Treatment device (10) according to at least one of the preceding claims, wherein a support device (38) is provided, which holds the bag (3) at least in the treatment position (8).

10.

Treatment device (10) according to the preceding claims, wherein the support device

(38) raise the bag (3) during aspiration.

eleven.

Closing station (1) for closing an open bag (3) particularly filled with a bulk product, comprising at least one treatment device (10) according to at least one of the preceding claims.

12.

Packaging machine with at least one filling device for filling bulk products in open bags, where at least one treatment device (10) is provided for the treatment of an open bag (3) filled with a bulk product, comprising at least one suction device (4) for the aspiration of air from the upper space (2) of the open sack (3) and at least one cleaning device (5) for cleaning the sack opening (6) of the sack ( 3) filling, characterized in that a clamping device (23) is provided for fastening and tightening the upper wall (25) of the sack of an open bag (3), comprising at least two clamping bars (26, 27) with two clamping units (28, 29) each, where each clamping bar (26, 27) comprises at least one suction unit (31), which is provided in a central area (37) of the clamping device ( 23) between the two clamping units (28, 29), and because the suction device (4) and the cleaning device (5)

they are arranged in a common treatment body (7), which can be moved between a treatment position (8) and a rest position (9), where the suction device (4) is provided to be submerged inside of bag (11) of bag (3) in the treatment position (8), while the cleaning device (5) remains at least substantially out. 13. Procedure for the treatment of a sack (3) filled with a bulk product, in which the upper wall (25) of the sack of an open sack (3) is held and squeezed, and in which a suction device (4) of a treatment device (10) is introduced into the upper space (2) of the bag (3) and draws air from the upper space (2), while a cleaning device (5) of the treatment device (10) air is blown by means of cleaning nozzles (20) on the inner upper wall (25) of the bag in the area of the rear closure area (40), to clean the inner upper wall (25) of the bag before closing, in where the upper wall (25) of the bag is held by at least two clamping units (26, 27) with two clamping units (28, 29) each, which move towards each other, while between the units of tightening some vacuum cleaners (31) open an inlet opening (32) in the upper wall (25) of the bag, to introduce the device of suction (4) of the treatment device (10) and 15 bring the cleaning device (5) to the upper inner wall (25) of the bag. 14. Method according to the preceding claim, wherein the vacuum cleaners (31) open the inlet opening (32) in the upper wall (25) of the bag approximately in the center between the clamping units, to introduce the suction device (4 ) of the treatment device (10) and bring the cleaning device (5) to 20 the upper inner wall (25) of the bag.