EP4108578B1 - Device for the extraction of gas from the upper part of a bag containing a powdery material, machine and corresponding procedure - Google Patents
Device for the extraction of gas from the upper part of a bag containing a powdery material, machine and corresponding procedure Download PDFInfo
- Publication number
- EP4108578B1 EP4108578B1 EP20720495.9A EP20720495A EP4108578B1 EP 4108578 B1 EP4108578 B1 EP 4108578B1 EP 20720495 A EP20720495 A EP 20720495A EP 4108578 B1 EP4108578 B1 EP 4108578B1
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- EP
- European Patent Office
- Prior art keywords
- clamps
- bag
- cannulas
- opening
- gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000000034 method Methods 0.000 title claims description 26
- 238000000605 extraction Methods 0.000 title claims description 21
- 241001631457 Cannula Species 0.000 claims description 84
- 239000012254 powdered material Substances 0.000 claims description 17
- 238000007664 blowing Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 46
- 238000004140 cleaning Methods 0.000 description 4
- 238000009461 vacuum packaging Methods 0.000 description 4
- 238000003466 welding Methods 0.000 description 4
- 230000001419 dependent effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B1/00—Packaging fluent solid material, e.g. powders, granular or loose fibrous material, loose masses of small articles, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
- B65B1/20—Reducing volume of filled material
- B65B1/26—Reducing volume of filled material by pneumatic means, e.g. suction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
- B65B31/04—Evacuating, pressurising or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied
- B65B31/041—Evacuating, pressurising or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied the nozzles acting from above on containers or wrappers open at their top
- B65B31/042—Evacuating, pressurising or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied the nozzles acting from above on containers or wrappers open at their top the nozzles being arranged for insertion into, and withdrawal from, the container or wrapper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
- B65B31/04—Evacuating, pressurising or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied
- B65B31/046—Evacuating, pressurising or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied the nozzles co-operating, or being combined, with a device for opening or closing the container or wrapper
- B65B31/048—Evacuating, pressurising or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied the nozzles co-operating, or being combined, with a device for opening or closing the container or wrapper specially adapted for wrappers or bags
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B55/00—Preserving, protecting or purifying packages or package contents in association with packaging
- B65B55/24—Cleaning of, or removing dust from, containers, wrappers, or packaging ; Preventing of fouling
Definitions
- the invention relates to a device for extracting gas from the upper part of a bag containing a powdered material.
- the invention relates to a device a device comprising cannulas comprising gas driving means, said cannulas having a distal end and a proximal end, said gas driving means being provided at least at said distal end, said cannulas being movable along a first direction for being inserted into the opening of a bag, and along a second direction, perpendicular to said first direction between: a close cannula position, wherein said cannulas are close to one another, such that said cannulas can be introduced in the opening of said bag along said first direction, and a spaced cannula position, wherein said cannulas are spaced apart from one another such a distance that said bag can be held by said opening through said cannulas, and first clamps movable between: an open position of the first clamps, wherein said first clamps are spaced apart from one another, such that said opening of said bag is arranged between said first clamps, in the open state, and a closed
- the invention relates to a machine for filling bags, and to a method for extracting gas from the upper area of a bag containing a powdered material.
- DE19541975A1 discloses a method using clamping jaws to tension the upper edge of the excess of the bag walls. This excess projects above the filling level so that these walls can slide or collapse. The rolls of the clamping jaws, having been brought together, are lowered towards the filling level so that they roll up while not being driven. When they are driven, the circumferential velocity is greater than the lowering velocity, thus tensioning the bag walls.
- US4221101A discloses an apparatus for heat-sealing the mouth of a bag supported on a conveyor includes a nozzle assembly for both spreading the mouth of the bag and evacuating the bag and a press assembly having confronting die units and resilient strip assemblies mounted to scissorable arms.
- KR20120053385 discloses a nozzle moving apparatus for a nozzle-type vacuum packing device is provided to prevent generation of air traps at a thermal sealing surface of a vacuum packing bag by tightly pulling the opened lower part of the vacuum packing bag in packing, thereby maximizing a vacuum packing work.
- the object of the invention is to provide a device of the type indicated above, having a more robust configuration and better operation for the purpose of extracting the air from bags.
- the cannulas are two cannulas with a substantially rectangular or elongated cross-section, said cannulas being oriented such that the longest sides of said cannulas are arranged parallel to the longest sides of the bag.
- the invention further includes a number of preferred features that are object of the dependent claims and the utility of which will be highlighted hereinafter in the detailed description of an embodiment of the invention.
- said first clamps have a length greater than the separation between said cannulas when they are in said spaced cannula position. This allows extracting the air from the bag in a more uniform and controlled manner.
- said device further comprises second clamps arranged between said proximal end of said cannulas and said first clamps, said second clamps being movable between: [i] an open position of the second clamps, wherein said second clamps are spaced apart from one another, such that said opening of said bag is arranged between said second clamps, in the open state, and [ii] a closed position of the second clamps, wherein said second clamps are close to one another, such that said opening of said bag is held between said second clamps.
- the second clamps improve the hold on the opening of the bag.
- said gas driving means of said cannulas further comprise gas blowing means, arranged for insufflating gas into said bag in the area of said opening when said first clamps are in said closed position of the first clamps.
- gas blowing means arranged for insufflating gas into said bag in the area of said opening when said first clamps are in said closed position of the first clamps.
- said gas driving means comprise gas suction means.
- the gas suction means can be used to complement the gas extraction performed by the first clamps, thereby assuring that the most amount of gas possible is extracted.
- said first direction of said cannulas is a vertical direction defined by the longitudinal axis of said cannulas, such that the step of extracting gas is more easily performed because the direction is parallel to the direction of gravity.
- said device comprises at least one motor for operating said first clamps and further comprises torque sensing means functionally associated to said first clamps for detecting the end of travel of said first clamps, corresponding to said final extraction position.
- the sensing means prevent the device from working under overload conditions, since when the first clamps exceed the setpoint value, the sensing means send instructions to the motor to stop the air extraction movement of the first clamps.
- the invention also relates to a machine for filling bags which has the device according to the invention.
- said machine is a form, fill, and seal machine.
- the invention also relates to a method for extracting gas from the upper area of a bag containing a powdered material with a device according to the invention.
- the method is characterized in that it comprises the following steps:
- This method allows extracting most of the gas from said bag in a more efficient and robust manner while at the same time, it also compacts the suspended powdered material.
- said cannulas are introduced in said opening of said bag without contacting the powdered material contained in said bag, thereby facilitating the first clamps extracting the air from the bag.
- the method further comprises a step of moving second clamps, which are in said open position of the second clamps, to said closed position of the second clamps, such that said opening of said bag is held between said second clamps, and after extracting the gas from said bag, said second clamps return to their open position of the second clamps.
- the use of the second clamps reinforces the hold on the opening of the bag.
- the method comprises the step of insufflating a gas over the opening of said bag through said cannulas to thereby cleaning the opening of the bag before performing welding.
- said gas that is insufflated over said opening of said bag is air. This provides for eliminating any powdered material residue from the opening of the bag for it to be clean, thereby facilitating the welding of the opening of the bag.
- the invention also comprises other detail features illustrated in the detailed description of an embodiment of the invention and in the attached figures.
- Figures 1 to 5 show an embodiment according to the invention of a device 1 for extracting gas, which is usually residual air, from the upper part of a bag 100 containing a powdered material.
- the device 1 comprises cannulas 2 having a distal end 6 and a proximal end 8. At the distal end 6, the cannulas 2 have gas driving means 4 in turn comprising gas blowing means and gas suction means.
- the gas driving means are indicated as gas outlet ports of the cannulas 2.
- the operating and blowing means can be, for example, a reversible pneumatic cylinder, or the like.
- the gas blowing means can be used for cleaning the opening 102 of the bag
- the gas suction means can be used for suctioning air from the bag 100. It is important to point out that the gas driving means 4 described in the figures do not refer to devices that move the cannulas, but rather to the means which move the gas for the purpose of cleaning the opening 102 of the bag.
- the cannulas 2 can be moved along a first vertical direction A, defined by the longitudinal axis C of the cannulas 2, and along a second direction B, perpendicular to the first direction A.
- a range of devices such as an asynchronous motor, a servomotor, or a pneumatic cylinder are provided.
- the cannulas 2 can be placed in a close cannula position and in a spaced cannula position.
- the close cannula position the cannulas 2 are close to one another. Therefore, as depicted in Figure 1 , the cannulas can be introduced, at the distal end 6 and along the first direction A, in the opening 102 of the bag 100.
- the cannulas 2 are spaced apart from one another such a distance that it allows the bag 100 to be held by the opening 102 through the cannulas 2. To that end, the cannulas grip the bag 100 on the inside and retain it by pulling it tight between the outer sides 14 of the cannulas 2.
- the device 1 furthermore has first clamps 10 suitable for extracting the air from the bag 100 which, in fact, are the part extracting most of the air. As can be seen in Figure 1 , these first clamps 10 have a length greater than the separation existing between the cannulas 2 when the latter are in the spaced cannula position.
- the first clamps 10 can be moved between an open position and a closed position.
- the opening 102 of the bag 100 is arranged between the first clamps 10, in the open state.
- the closed position the opening 102 of the bag 100 is pressed by the first clamps 10 in a non-tight manner. Therefore, despite the fact that the first clamps 10 press the bag 100, the air in the bag 100 can get out thereof. This is important because for extracting the air from the bag 100, the first clamps 10 can be moved along the first direction A, in the direction going from the proximal end 8 toward the distal end 6.
- the first clamps 10 can be placed between an initial air extraction position, wherein the first clamps 10 are placed below the distal end 6 of the cannulas 2 and spaced from the powdered material of the bag, and a final air extraction position, wherein the first clamps 10 are close to the powdered material of the bag. For this reason, if the first clamps 10 tightly pressed the entire opening 102 of the bag 100, the air in the bag 100 could not be extracted therefrom.
- the device 1 also has torque sensing means linked to a motor 18 operating the first clamps 10. Therefore, when the torque sensing means detect the end of travel of the first clamps 10, corresponding to the final extraction position, they send a signal to the motor 18 to stop moving the first clamps 10.
- the device 1 comprises second clamps 12, which are arranged between the proximal end 8 of the cannulas 2 and the first clamps 10.
- the second clamps 12 can be moved between an open position, wherein the opening 102 of the bag 100 is arranged between the second clamps 12, in the open state, and a closed position, wherein the opening 102 of the bag is held by the second clamps 12, such that they can exert can pressure on the bag 100 to thereby hold it.
- the second clamps 12 allow holding the bag 100 while at the same time they allow air in the bag 100 to get out.
- Figure 6 shows the steps of the method in a side view, while the right side shows the corresponding front view of this same step.
- the first clamps 10 and the second clamps 12 are in their open position, and the cannulas 2 are spaced from the bag 100, such that a bag 100 can be placed in the station.
- the method starts by placing the cannulas 2 in their close cannula position and introducing them in the opening 102 of the bag 100 at their distal end 6.
- the cannulas 2 are moved to their spaced cannula position to hold the bag 100, and the second clamps 12, which also help to hold the opening 102 of the bag, are closed.
- the first clamps 10 are closed, pressing the bag 100, and are moved, as shown in Figure 6D , in the direction defined by the longitudinal axis C of the cannulas 2, in the direction going from the proximal end 8 of the cannulas 2 toward the distal end 6 of the cannulas 2, thereby successfully extracting the air from the bag 100.
- the first clamps 10 press the bag 100 such that the air in the bag 100 can get out through the opening 102 thereof.
- the gas driving means 4 can suction the air from the bag 100 before, during, or after the first clamps 100 have extracted the air from the bag 100.
- the first clamps 10 are opened. Then the cannulas 2 are moved toward the proximal end 8, i.e., upwards, and the first clamps 10 are closed below the cannulas 2. Once the first clamps 10 have been closed, the gas blowing means insufflate a gas over the opening 102 of the bag, thereby eliminating any powdered material residues there may be.
- the gas used is preferably dry air, but inert gases with a low percentage of moisture and having protective properties with respect to the product in the bag can be used.
- first clamps 10, the cannulas 2, and the second clamps 12 return to their initial state to begin the process again.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Vacuum Packaging (AREA)
- Basic Packing Technique (AREA)
Description
- The invention relates to a device for extracting gas from the upper part of a bag containing a powdered material.
- More specifically, the invention relates to a device a device comprising cannulas comprising gas driving means, said cannulas having a distal end and a proximal end, said gas driving means being provided at least at said distal end, said cannulas being movable along a first direction for being inserted into the opening of a bag, and along a second direction, perpendicular to said first direction between: a close cannula position, wherein said cannulas are close to one another, such that said cannulas can be introduced in the opening of said bag along said first direction, and a spaced cannula position, wherein said cannulas are spaced apart from one another such a distance that said bag can be held by said opening through said cannulas, and first clamps movable between: an open position of the first clamps, wherein said first clamps are spaced apart from one another, such that said opening of said bag is arranged between said first clamps, in the open state, and a closed position of the first clamps, wherein said first clamps are close to one another, such that said opening of said bag is pressed between said first clamps.
- Likewise, the invention relates to a machine for filling bags, and to a method for extracting gas from the upper area of a bag containing a powdered material.
- Devices for extracting gas from bags filled with bulk products, both in preformed bag filling machines, as well as in form, fill, and seal machines are known. These latter machines form their own bag and are known in the art by their acronym FFS (form, fill, and seal).
- In the filling station of any of these machines, while the bag is being filled up with the powdered material, the powdered material is also being compacted by tapping or vibration. Finally, a step for extracting gas from the upper area of the bag is envisaged. Normally, this gas is usually residual air. Extracting gas from the bag causes the bag to adopt a parallelepipedic shape, thereby facilitating its transport and storage.
- In machines for filling bags with a fine product, and particularly with a powdered product, air is commonly extracted by suction. Nevertheless, this extraction system is very slow, thus affecting the productivity of the machine in which it is installed.
- One of the techniques used for extracting gas from the bag is by introducing cannulas in the bag, forming a vacuum. However, this technique has the drawback of not extracting enough gas.
-
DE19541975A1 discloses a method using clamping jaws to tension the upper edge of the excess of the bag walls. This excess projects above the filling level so that these walls can slide or collapse. The rolls of the clamping jaws, having been brought together, are lowered towards the filling level so that they roll up while not being driven. When they are driven, the circumferential velocity is greater than the lowering velocity, thus tensioning the bag walls.US4221101A discloses an apparatus for heat-sealing the mouth of a bag supported on a conveyor includes a nozzle assembly for both spreading the mouth of the bag and evacuating the bag and a press assembly having confronting die units and resilient strip assemblies mounted to scissorable arms. -
KR20120053385 - The object of the invention is to provide a device of the type indicated above, having a more robust configuration and better operation for the purpose of extracting the air from bags.
- This object is achieved by means of a device of the type indicated above, characterized in that when said cannulas are in said spaced cannula position and said first clamps are in said closed position of the first clamps, said first clamps are movable along said first direction, in the direction of said proximal end towards said distal end, moving away from said proximal end, between: an initial extraction position, a final extraction position, for extracting gas from said bag.
- This allows moving the clamps in the closed position from the proximal end of the cannulas to the distal end thereof, thus extracting the gas from the bag while at the same time the suspended powdered material is compacted. The bag thereby adopts the desired parallelepipedic shape.
- In the invention, preferably the cannulas are two cannulas with a substantially rectangular or elongated cross-section, said cannulas being oriented such that the longest sides of said cannulas are arranged parallel to the longest sides of the bag.
- The invention further includes a number of preferred features that are object of the dependent claims and the utility of which will be highlighted hereinafter in the detailed description of an embodiment of the invention.
- Preferred embodiments the features of which are described in the dependent claims have been provided based on the invention defined in the main claim.
- Preferably, said first clamps have a length greater than the separation between said cannulas when they are in said spaced cannula position. This allows extracting the air from the bag in a more uniform and controlled manner.
- Preferably, said device further comprises second clamps arranged between said proximal end of said cannulas and said first clamps, said second clamps being movable between: [i] an open position of the second clamps, wherein said second clamps are spaced apart from one another, such that said opening of said bag is arranged between said second clamps, in the open state, and [ii] a closed position of the second clamps, wherein said second clamps are close to one another, such that said opening of said bag is held between said second clamps. The second clamps improve the hold on the opening of the bag.
- Preferably, said gas driving means of said cannulas further comprise gas blowing means, arranged for insufflating gas into said bag in the area of said opening when said first clamps are in said closed position of the first clamps. This allows eliminating any powdered material residue from the opening of the bag for it to be clean, thereby facilitating the welding of the opening of the bag.
- Even more preferably, said gas driving means comprise gas suction means. The gas suction means can be used to complement the gas extraction performed by the first clamps, thereby assuring that the most amount of gas possible is extracted.
- Preferably, said first direction of said cannulas is a vertical direction defined by the longitudinal axis of said cannulas, such that the step of extracting gas is more easily performed because the direction is parallel to the direction of gravity.
- Preferably, said device comprises at least one motor for operating said first clamps and further comprises torque sensing means functionally associated to said first clamps for detecting the end of travel of said first clamps, corresponding to said final extraction position. The sensing means prevent the device from working under overload conditions, since when the first clamps exceed the setpoint value, the sensing means send instructions to the motor to stop the air extraction movement of the first clamps.
- The invention also relates to a machine for filling bags which has the device according to the invention.
- Preferably, said machine is a form, fill, and seal machine.
- The invention also relates to a method for extracting gas from the upper area of a bag containing a powdered material with a device according to the invention. The method is characterized in that it comprises the following steps:
- [a] placing said cannulas comprising gas driving means in said close cannula position, wherein said cannulas are close to one another,
- [b] introducing said cannulas in the opening of said bag, and then
- [c] moving said cannulas to said spaced cannula position, wherein said cannulas are spaced apart from one another such a distance that it allows said bag to be held by said opening through said cannulas,
- [d] moving said first clamps, which are in said open position of the first clamps, to said closed position of the first clamps, such that said opening of said bag is pressed between said first clamps along the entire width of said opening, and then
- [e] moving said first clamps in the longitudinal direction of said cannulas in the direction of said proximal end toward said distal end, moving away from said distal end between:
- [i] said initial extraction position,
- [ii] said final extraction position, for extracting gas from said bag,
- [f] moving said cannulas to said close cannula position and
- [g] extracting said cannulas from said opening of said bag.
- This method allows extracting most of the gas from said bag in a more efficient and robust manner while at the same time, it also compacts the suspended powdered material.
- Preferably, in the method said cannulas are introduced in said opening of said bag without contacting the powdered material contained in said bag, thereby facilitating the first clamps extracting the air from the bag.
- In another preferred embodiment of the method, when said torque sensing means detect a torque greater than a setpoint value, said first clamps reach said final extraction position.
- Preferably, after the step of moving said cannulas to said spaced cannula position, the method further comprises a step of moving second clamps, which are in said open position of the second clamps, to said closed position of the second clamps, such that said opening of said bag is held between said second clamps, and after extracting the gas from said bag, said second clamps return to their open position of the second clamps. The use of the second clamps reinforces the hold on the opening of the bag.
- Preferably, after said step of extracting gas and while said first clamps are in said final extraction position, the method comprises the step of insufflating a gas over the opening of said bag through said cannulas to thereby cleaning the opening of the bag before performing welding.
- Preferably, said gas that is insufflated over said opening of said bag is air. This provides for eliminating any powdered material residue from the opening of the bag for it to be clean, thereby facilitating the welding of the opening of the bag.
- The invention also comprises other detail features illustrated in the detailed description of an embodiment of the invention and in the attached figures.
- The advantages and features of the invention will become apparent from the following description in which a preferred embodiment of the invention in reference to the figures is provided in a non-limiting manner with respect to the scope of the main claim.
-
Figure 1 is front view of a bag form, fill, and seal machine according to a first embodiment, wherein the cannulas of the machine are in the proximal position. -
Figure 2 is another front view of the same machine, wherein the cannulas of the machine are in the spaced position. -
Figure 3 is a side view of the same machine, wherein the first clamps are in the open position. -
Figure 4 is another side view of the machine, wherein the first clamps are in the closed position. -
Figure 5 is another side view of the machine. -
Figure 6 depicts the method of extracting gas from a bag. -
Figures 1 to 5 show an embodiment according to the invention of adevice 1 for extracting gas, which is usually residual air, from the upper part of abag 100 containing a powdered material. - The
device 1 comprisescannulas 2 having adistal end 6 and aproximal end 8. At thedistal end 6, thecannulas 2 have gas driving means 4 in turn comprising gas blowing means and gas suction means. In the figures, the gas driving means are indicated as gas outlet ports of thecannulas 2. The operating and blowing means can be, for example, a reversible pneumatic cylinder, or the like. As will be described below, the gas blowing means can be used for cleaning theopening 102 of the bag, and the gas suction means can be used for suctioning air from thebag 100. It is important to point out that the gas driving means 4 described in the figures do not refer to devices that move the cannulas, but rather to the means which move the gas for the purpose of cleaning theopening 102 of the bag. - As can be seen in
Figures 1 and2 , thecannulas 2 can be moved along a first vertical direction A, defined by the longitudinal axis C of thecannulas 2, and along a second direction B, perpendicular to the first direction A. To move the cannulas along directions A and B in the device according to the invention, for example, a range of devices such as an asynchronous motor, a servomotor, or a pneumatic cylinder are provided. - The possibility of movement in these two directions allows the
cannulas 2 to be placed in a close cannula position and in a spaced cannula position. On one hand, in the close cannula position, thecannulas 2 are close to one another. Therefore, as depicted inFigure 1 , the cannulas can be introduced, at thedistal end 6 and along the first direction A, in theopening 102 of thebag 100. On the other side, as can be seen inFigure 2 , in the spaced cannula position, thecannulas 2 are spaced apart from one another such a distance that it allows thebag 100 to be held by theopening 102 through thecannulas 2. To that end, the cannulas grip thebag 100 on the inside and retain it by pulling it tight between theouter sides 14 of thecannulas 2. - Despite the fact that the gas driving means 4 can help extract the residual air from the
bag 100, thedevice 1 furthermore has first clamps 10 suitable for extracting the air from thebag 100 which, in fact, are the part extracting most of the air. As can be seen inFigure 1 , thesefirst clamps 10 have a length greater than the separation existing between thecannulas 2 when the latter are in the spaced cannula position. - As shown in
Figures 3 and4 , the first clamps 10 can be moved between an open position and a closed position. On one hand, in the open position theopening 102 of thebag 100 is arranged between thefirst clamps 10, in the open state. On the other hand, in the closed position theopening 102 of thebag 100 is pressed by the first clamps 10 in a non-tight manner. Therefore, despite the fact that the first clamps 10 press thebag 100, the air in thebag 100 can get out thereof. This is important because for extracting the air from thebag 100, the first clamps 10 can be moved along the first direction A, in the direction going from theproximal end 8 toward thedistal end 6. Namely, the first clamps 10 can be placed between an initial air extraction position, wherein thefirst clamps 10 are placed below thedistal end 6 of thecannulas 2 and spaced from the powdered material of the bag, and a final air extraction position, wherein thefirst clamps 10 are close to the powdered material of the bag. For this reason, if the first clamps 10 tightly pressed theentire opening 102 of thebag 100, the air in thebag 100 could not be extracted therefrom. - The
device 1 also has torque sensing means linked to a motor 18 operating thefirst clamps 10. Therefore, when the torque sensing means detect the end of travel of thefirst clamps 10, corresponding to the final extraction position, they send a signal to the motor 18 to stop moving thefirst clamps 10. - Likewise, for the purpose of better holding the
opening 102 of the bag, thedevice 1 comprises second clamps 12, which are arranged between theproximal end 8 of thecannulas 2 and thefirst clamps 10. The second clamps 12 can be moved between an open position, wherein theopening 102 of thebag 100 is arranged between thesecond clamps 12, in the open state, and a closed position, wherein theopening 102 of the bag is held by thesecond clamps 12, such that they can exert can pressure on thebag 100 to thereby hold it. The second clamps 12 allow holding thebag 100 while at the same time they allow air in thebag 100 to get out. - Next, the method of extracting gas of the machine described according to the first embodiment is described based on
Figure 6 . The left part ofFigure 6 shows the steps of the method in a side view, while the right side shows the corresponding front view of this same step. - As can be seen in
Figure 6A , before starting the method of extracting the air, thefirst clamps 10 and thesecond clamps 12 are in their open position, and thecannulas 2 are spaced from thebag 100, such that abag 100 can be placed in the station. - As can be seen in
Figure 6B , the method starts by placing thecannulas 2 in their close cannula position and introducing them in theopening 102 of thebag 100 at theirdistal end 6. Next, as depicted inFigure 6C , thecannulas 2 are moved to their spaced cannula position to hold thebag 100, and thesecond clamps 12, which also help to hold theopening 102 of the bag, are closed. Subsequently, thefirst clamps 10 are closed, pressing thebag 100, and are moved, as shown inFigure 6D , in the direction defined by the longitudinal axis C of thecannulas 2, in the direction going from theproximal end 8 of thecannulas 2 toward thedistal end 6 of thecannulas 2, thereby successfully extracting the air from thebag 100. As discussed above, the first clamps 10 press thebag 100 such that the air in thebag 100 can get out through theopening 102 thereof. Likewise, the gas driving means 4 can suction the air from thebag 100 before, during, or after thefirst clamps 100 have extracted the air from thebag 100. - Next, as shown in
Figure 6E , for cleaning theopening 102 of thebag 100, before performing welding corresponding, thefirst clamps 10 are opened. Then thecannulas 2 are moved toward theproximal end 8, i.e., upwards, and thefirst clamps 10 are closed below thecannulas 2. Once the first clamps 10 have been closed, the gas blowing means insufflate a gas over the opening 102 of the bag, thereby eliminating any powdered material residues there may be. The gas used is preferably dry air, but inert gases with a low percentage of moisture and having protective properties with respect to the product in the bag can be used. - Finally, the
first clamps 10, thecannulas 2, and thesecond clamps 12 return to their initial state to begin the process again. - The embodiments described up until now represent non-limiting examples, such that one skilled in the art will understand that in addition to the examples shown, multiple combinations of the claimed features are possible within the scope of the invention.
Claims (15)
- A device (1) for extracting gas from the upper part of a bag (100) containing a powdered material, said device (1) comprising:[a] cannulas (2) comprising gas driving means (4), said cannulas (2) having a distal end (6) and a proximal end (8), said gas driving means (4) being provided at least at said distal end (6), said cannulas (2) being movable along a first direction (A) for being inserted into the opening (102) of a bag (100), and along a second direction (B), perpendicular to said first direction (A) between:[i] a close cannula position, wherein said cannulas (2) are close to one another, such that said cannulas (2) can be introduced in the opening (102) of said bag (100) along said first direction (A), and[ii] a spaced cannula position, wherein said cannulas (2) are spaced apart from one another such a distance that said bag (100) can be held by said opening (102) through said cannulas (2), and[b] first clamps (10) movable between:characterized in that when said cannulas (2) are in said spaced cannula position and said first clamps (10) are in said closed position of the first clamps, said first clamps (10) are movable along said first direction (A), in the direction of said proximal end (8) towards said distal end (6), moving away from said proximal end (8), between:[i] an open position of the first clamps (10), wherein said first clamps (10) are spaced apart from one another, such that said opening of said bag is arranged between said first clamps (10), in the open state, and[ii] a closed position of the first clamps (10), wherein said first clamps (10) are close to one another, such that said opening (102) of said bag is pressed between said first clamps (10),[i] an initial extraction position,[ii] a final extraction position, for extracting gas from said bag (100).
- The device (1) according to claim 1, characterized in that said first clamps (10) have a length greater than the separation between said cannulas (2) when they are in said spaced cannula position.
- The device (1) according to any one of claims 1 to 2, characterized in that it further comprises second clamps (12) arranged between said proximal end (8) of said cannulas (2) and said first clamps (10), said second clamps (12) being movable between:[i] an open position of the second clamps, wherein said second clamps (12) are spaced apart from one another, such that said opening (102) of said bag is arranged between said second clamps (12), in the open state, and[ii] a closed position of the second clamps, wherein said second clamps (12) are close to one another, such that said opening (102) of said bag is held between said second clamps (12).
- The device (1) according to any one of claims 1 to 3, characterized in that said gas driving means (4) of said cannulas (2) further comprise gas blowing means, arranged for insufflating gas into said bag (100) in the area of said opening (102) when said first clamps (10) are in said closed position of the first clamps.
- The device (1) according to any one of claims 1 to 4, characterized in that said gas driving means (4) comprise gas suction means.
- The device (1) according to any one of claims 1 to 5, characterized in that said first direction (A) of said cannulas (2) is a vertical direction defined by the longitudinal axis (C) of said cannulas (2).
- The device (1) according to any one of claims 1 to 6, characterized in that it comprises at least one motor (18) for operating said first clamps (10) and further comprises torque sensing means functionally associated to said first clamps (10) for detecting the end of travel of said first clamps (10), corresponding to said final extraction position.
- A machine for filling bags, characterized in that it comprises a device (1) according to any one of claims 1 to 7.
- The machine according to claim 8, characterized in that it is a form, fill, and seal machine.
- A method for extracting gas from the upper area of a bag (100) containing a powdered material with a device (1) according to any one of the preceding claims, characterized in that it comprises the following steps:[a] placing said cannulas (2) comprising gas driving means (4) in said close cannula position, wherein said cannulas (2) are close to one another,[b] introducing said cannulas (2) in the opening (102) of said bag, and then[c] moving said cannulas (2) to said spaced cannula position, wherein said cannulas (2) are spaced apart from one another such a distance that it allows said bag (100) to be held by said opening (102) through said cannulas (2),[d] moving said first clamps (10), which are in said open position of the first clamps, to said closed position of the first clamps, such that said opening (102) of said bag is pressed between said first clamps (10) along the entire width of said opening (102), and then[e] moving said first clamps (10) in the longitudinal direction of said cannulas (2) in the direction of said proximal end (8) toward said distal end (6), moving away from said distal end (6) between:[i] said initial extraction position,[ii] said final extraction position, for extracting gas from said bag (100),[f] moving said cannulas (2) to said close cannula position and[g] extracting said cannulas from said opening (102) of said bag.
- The method according to the claim 10, characterized in that said cannulas (2) are introduced in said opening (102) of said bag (100) without contacting the powdered material contained in said bag (100).
- The method according to claim 10 or 11, characterized in that when said torque sensing means detect a torque greater than a setpoint value, said first clamps (10) reach said final extraction position.
- The method according to any one of claims 10 to 12, characterized in that after the step of moving said cannulas (2) to said spaced cannula position, the method further comprises a step of moving second clamps (12), which are in said open position of the second clamps, to said closed position of the second clamps, such that said opening (102) of said bag is held between said second clamps (12), and in that after extracting the gas from said bag (100), said second clamps (12) return to their open position of the second clamps.
- The method according to any one of claims 10 to 13, characterized in that after said step of extracting gas and while said first clamps (10) are in said final extraction position, the method comprises the step of insufflating a gas over the opening (102) of said bag (100) through said cannulas (2).
- The method according to claim 14, characterized in that said gas that is insufflated over said opening (102) of said bag (100) is air.
Applications Claiming Priority (1)
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PCT/ES2020/070108 WO2021165550A1 (en) | 2020-02-17 | 2020-02-17 | Device for the extraction of gas from the upper part of a bag containing a powdery material, machine and corresponding procedure |
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EP4108578A1 EP4108578A1 (en) | 2022-12-28 |
EP4108578B1 true EP4108578B1 (en) | 2024-05-22 |
EP4108578C0 EP4108578C0 (en) | 2024-05-22 |
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WO (1) | WO2021165550A1 (en) |
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EP2103520B1 (en) * | 2008-03-17 | 2011-08-17 | Haver & Boecker oHG | Handling device and method for handling an open sack filled with bulk goods |
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US4221101A (en) * | 1979-02-12 | 1980-09-09 | Fmc Corporation | Apparatus for evacuating and sealing bags |
DE19541975A1 (en) * | 1995-11-10 | 1997-05-15 | Haver & Boecker | Method of shaping and venting filled open bag |
KR101283395B1 (en) * | 2010-06-09 | 2013-07-08 | 대상 주식회사 | Packing apparatus of container for paste kind and packing method |
KR20120053385A (en) * | 2010-11-17 | 2012-05-25 | 정윤택 | Nozzle moving apparatus of left and right in the nozzle system of vacuum package device |
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2020
- 2020-02-17 WO PCT/ES2020/070108 patent/WO2021165550A1/en active Search and Examination
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EP2103520B1 (en) * | 2008-03-17 | 2011-08-17 | Haver & Boecker oHG | Handling device and method for handling an open sack filled with bulk goods |
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WO2021165550A1 (en) | 2021-08-26 |
EP4108578C0 (en) | 2024-05-22 |
EP4108578A1 (en) | 2022-12-28 |
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