DK144237B - PROMOTION & TASTING AND MACHINE FOR VACUUM FILLING BAGS WITH CORN SHAPED LODGE - Google Patents

Description

(19) DENMARK (WJ

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^ 02) PRESENTATION WRITING (11) 144237 B

DIRECTORATE OF THE PATENT AND TRADEMARKET SYSTEM

(21) Application No. 1 106/74 (51) Int.CI.3 B 65 B 31/02 (22) Filing date 1 · Mar. 1974 (24) Race day 1. tnar. 1 974 (41) Aim. available 3rd s ep. 1974 (44) Posted 25 Jan 1982 (86) International Application No. - (86) International Filing Day - (85) Continuation Day ~ (62) Master Application No. - (30) Priority Mar 2 1975, 7507831, m (71) Applicant _CAPATAINER SA, CH-1000 Lausanne, CH.

(72) Inventor Gaston Fagniart, FR.

(74) Associate Engineering Company Budde, Schou & Co.

(54) Method and machine for vacuum = vacuum filling of cereal bags = shaped bulk goods.

The invention relates to a method of the kind set out in the preamble of claim 1.

Such methods are known from FR patent specification no.

No. 1,304,452 and U.S. Patent No. 2,720,375.

The filled bags resulting from the practice of the known methods of this kind appear more

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or less irregularly shaped blocks which are more or CO less rigid due to atmospheric pressure compressing the contents to a solid mass. When grabbing such filled bags, -3 * e.g. for the purpose of transport, it is necessary that the gripping means be of such a nature as to enable them to adapt *

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2 144237, in accordance with the irregular shape, can partly grasp and hold the pouch without damaging it, since only the smallest hole in the pouch will cause loss of vacuum and thus the contents of the pouch are exposed to the air, and moreover the filled pouch becomes more or less less soft and therefore deformable.

These disadvantages are avoided by proceeding as set forth in the characterizing part of claim 1. By bringing the bag to abutment against the flat and rigid walls, it is achieved that the part of the outside of the bag appears on a flat surface and the vibration makes it possible to give the mass treated in the bag a cohesion of such a nature that when the bag is evacuated and sealed, the bag of contents appears as a non-deformable block, wherein at least one of the sides of the block is planar so that it can be engaged with a suction plate capable of holding and / or carrying the filled bag without risk that the bag will break.

By also proceeding as set out in claim 2, it is achieved partly that the volume of the bag becomes as large as possible and partly that any wrinkles or folds that could otherwise form vulnerable points or lines are straightened out.

If, as stated in the preamble of claim 3, a bag with a neck is used, it is prevented from being shaken against the bag by proceeding as indicated in the characterizing part of this claim.

The invention also relates to a machine for carrying out the method according to the invention. This machine is of the type specified in the preamble of claim 4 and according to the invention is also designed as indicated in the characterizing part of this claim. In this embodiment, the method can be practiced with simple means, the same or substantially the same means being used to hold the bag in the filling position, to hold a portion of it in abutment against the rigid and planar wall (s), and to vibrate the bag. .

The embodiment of the machine according to claim 5 is suitable for carrying out the embodiment of the method according to claim 2, and by means of the design according to claim 6, the means according to claim 5 can also be utilized to transport the bag into the enclosure. in which it must be retained during filling.

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In the embodiment according to claim 7, it is achieved that the closure can be extended out and into the chamber at the same time that the cover is opened or closed, respectively, so that the working rate of the machine can be made higher than would otherwise be possible.

The design of the means for holding the neck of the bag during filling means that the holding can be achieved without the risk of damage to the neck.

The invention will now be explained in more detail with reference to the drawing, in which: 1 is a schematic and perspective view of a machine according to the invention; FIG. 2 shows the arrangement of the grip of the air supply tube and the means for holding the neck of the bag; FIG. Figures 3 and 4 show, respectively, from the end and from above, the means for gripping and holding the neck of the bag and the mechanism for bringing these members into position; 5 shows a half-length section of the telescopic nozzle of the discharge tube, the movable hooks and the means for bringing these parts into their respective positions; FIG. 6 shows a longitudinal section of the chamber in which the material for treatment is weighed; FIG. 7 is a cross-sectional view of one of the heating welding jaws; and FIG. Figure 8 shows a cross-section of the welding jaws in the welding position and the wall portions of the neck of the jaws.

The filled bags or bags 2 have at least one flat outer surface so that they can be gripped by a suction plate.

Good results have been achieved with bags of generally cubic form, made of polyethylene with a thickness of 1 mm. This thickness is sufficient to make the bag impermeable to gaseous and to allow prolonged storage; a good resistance to shock and abrasion is also obtained.

To allow filling of the bag, a cylindrical neck 3 with a vertical axis is placed on top of it, which is connected to the side walls of the bag by means of a pyramid-shaped part.

The bags are supplied to the machine by means of a supply chain 1, suspended in an endless conveyor 4 by means of clamps 5 which engage the wall of the individual bags at the height of the upper part 6 of the neck 3 (see Fig. 1).

Near the machine, the individual bags are removed to inflate to obtain the maximum internal volume and removal to the greatest extent possible of any folds that could be formed in the outer surface of the bag and which could interfere with subsequent handling of the bag by using suction plates.

The neck 3 of the bag is manually engaged with the lower end 8 of the vertical tube 7, the upper end of which is supplied with blowing air by means of a blower 9 · If the neck 3 and the lower end 8 are in the required mutual position, one (not shown) micro-o contact that a clamping ring 10 disposed around the lower end 8 of the tube 7 is inflated (see Fig. 2).

This clamping ring 10, shown in the non-inflated condition of FIG. 2, comes into contact with the inner wall of the claim and holds the collar against the air supply pipe 7 ·

This air supply tube 7 is used to place each bag in place in the machine itself. To this end, the tube is slidably mounted on parallel guide rods 11 and 12 which allow the bag to be placed above the machine, and the tube 7 is also telescopically extendable to guide the bag into the machine.

The machine itself comprises two identical treatment chambers 13 and 14, and above each of these chambers is provided a venting and weighing chamber 15 and 16 respectively, which are connected to the respective treatment chamber by means of vertical discharge pipes 18 and 19 respectively for the material to be treated.

The two treatment chambers 13 and 14 are arranged opposite one another in the same cylindrical housing 17 with a horizontal axis, separated fluid-tightly by a transverse wall, but connected to each other by means of a tube 56 in which is inserted valve 57 > whose function will be described later. The two ends of the housing 17 can be closed fluid-tight by means of vertical circular doors 20 and 21 mounted on ball bearing bearings which in turn slide on horizontal steel bars 22 and 23, 24 and 25 and are adapted to be moved by a maneuvering cylinder such as 26 .

As shown in FIG. 1 and 4, each door, e.g. the door 20, provided with a vertical carrying basket 27, the inner dimensions of which correspond to the outer dimensions of the cubic part of the bag and which are open upwards to allow the bags to be inserted vertically by means of the telescopic air supply tube 7 when the door 20 is open. The task of the carrier basket 27 is to control the walls of the bag during the filling, thereby preventing the formation of folds which interfere with the subsequent gripping by the suction plate. At the height of its bottom, the carrying basket is provided with a shaking table 92 which is arranged to shake the material together in the bag during processing.

In a preferred embodiment of the machine, the carrier basket 27 is also open at one of the sides, e.g. as shown at 32, to allow the filled and sealed bag to eventually be gripped by a vertical suction plate 28. When the door 20 is closed, the open side 32 is closed by a vertical plate 29 3 disposed within chamber 13 and arranged to be moved by a (not shown) horizontal maneuvering cylinder, thereby ensuring that the bag is well controlled throughout its circumference.

FIG. 3 and 4 show how the door is provided with a mechanism intended to control the collar of the bag during the filling operation. This function cannot be performed by the telescopic tube 7? which must be pulled out of the neck of the bag after venting the clamping ring 10 before the cover 20 can be closed.

This mechanism comprises two gripping arcs 30 and 31j which together form an annular crown in their working position, which is inserted on the upper part 6 of the bag neck 3. the arch 30 has a downwardly directed groove 34 into which the edge portion of the neck engages (cf. Fig. 2). An inflatable clamping bow 35 in which is secured in the groove 34 comes into contact with the outside of the neck and presses it firmly against the inner wall 36 of the groove 34 which is disposed within the neck.

Each of the crown gripping arcs 30 and 31 is attached to an inclined arm 37 and 38, respectively, pivotally mounted on a cylindrical vertical shaft 39 and 40, respectively, which is attached to a horizontal transverse bar 45 which is parallel to the main plane of the gate 20. A maneuvering cylinder 4l and 42, respectively, one part of which is pivotal about a vertical axis 4c and 47, respectively, which is attached to the transverse bar and whose other part is connected to a pivot arm 43 and 44 respectively attached to the inclined arm, allows the oblique to move. arms between a position in which the gripping arcs 3 ° and 31 control the neck of the bag, and a release position indicated by 30a and 31a, respectively. One stop 48 and 49, respectively (not shown in Fig. 3), which is attached to the transverse bar 45, restricts the swing arm movement and makes it possible to achieve a precisely determined working position for the gripping arcs 30 and 31 for controlling the neck 3 of the bag. 6 144237

Poor to enable note 34 of the crown to intervene with and from. For example, in the bag neck, the transverse bar 45, which carries the inclined arms, is arranged to move in a vertical direction by means of a vertical maneuvering cylinder 50, one part of which is connected to the underside of the movable transverse bar 45 and the other part of which is connected to another transversal bar. 51, which is attached to the gate 20. The movable cross bar 45 is guided in its vertical movement by the shafts 59 and 40, which are extended below the cross bar 45 and arranged to slide in vertical cylindrical bores in the fixed cross bar 51 · When the gate 20 is closed, the pouch, whose side surfaces are guided by the walls of the support basket 27 and the movable plate 29, and whose neck 5 is guided by the gripping curves 50 and 31, is placed in a filling position with the opening of the neck immediately below the vertical discharge tube 18 for the material which needs to be addressed.

As shown in FIG. 5, the lower portion of the discharge tube 18 is provided with a telescopic nozzle 33 which is coaxial with the tube 18 and slidably mounted for vertical movement outside the tube 18. This telescopic nozzle 33 is inserted vertically within the neck 3 before the bag is filled, and essentially prevents the material to be processed from getting outside the bag. The nozzle 33 can be moved up and down by means of two diametrically opposed and synchronized maneuvering cylinders 52 inserted between a fixed frame 53 and a yoke 54 attached to the nozzle 33. The yoke 54 is guided in its vertical movement by cylindrical vertical guides. 55 on which it can slide.

As mentioned above, the discharge pipe 18 connects the treatment chamber 13 to the vent and weigh chamber 15 · The connection between the two chambers can be interrupted by a fluid tight damper 63 arranged in the discharge pipe 18 (cf. Fig. 6).

The vent and weigh chamber 15, formed in the same manner as the corresponding chamber 16, is constrained by a wall 58 shaped as a vertical cone funnel and on top of it by a cylindrical casing 59 closed at its upper end by a cover. 60th

A tube 64, which opens into the funnel-shaped portion 58 of the wall, continuously connects the interior of chambers 15 and 16 to a suppressor source 93, valves 65 and 66 allowing the connection to one or the other chamber if only one of the chambers is disconnected. half of the machine must be used.

In the cover 60, the lower part of a filling funnel 6l which receives the material to be vented and treated, the funnel 6l can be closed from the chamber 15 by means of a fluid-tight damper 62. During operation it is always advisable to keep filling The filling funnel 61 is filled so that when the damper 62 is opened to introduce material into the chamber 15, a considerable amount of air does not flow into the chamber at the same time.

In the interior of the chamber 15, the feedstock supplied through the damper c2 is received in a vertical hopper 67, the lower part of which is constituted by a cylindrical tube 68, which is concentric with the discharge tube 18, and can be closed by a closing flap 69.

The hopper 67 is supported by a weighing mechanism of not known type, as in FIG. 1 is symbolized by scale disks 70 and 71 for the chambers 15 and 16 respectively, which weighing mechanism allows the exact amount of material to be processed into the bag 15 to be introduced into the bag and which runs from the chamber 15 into the treatment chamber 13 through the closing flap 69 and the damper 63. The various steps in this process must be described below simultaneously with the explanation of the entire system's operation.

When the bag is filled, it is vacuum-sealed transversely to the neck of the bag 3 by means of an apparatus placed in the chamber 13 (the chamber 14 contains a corresponding apparatus).

First, however, it is necessary to shape the neck 3, which was originally cylindrical, flat in order to have two adjacent walls. For this purpose, two hooks 72 which are diametrically opposite on each side of the axis of the neck 3 are used and which can be moved vertically in a plane which is perpendicular to the plane in which the maneuvering cylinders for the telescopic nozzle 33 o placed.

These two hooks, which in their resting position align with the lower part of the nozzle 33, are simultaneously submerged with the nozzle by two diametrically opposed maneuvering cylinders 73, each operating between the fixed frame 53 and a sliding sleeve 7 ^ which slides on a cylindrical vertical guide 75, as well as a vertical maneuvering cylinder 76, which in its resting position in this first step of the descent of the hook transmits the movement to the supporting means of each hook, e.g. hook 77 of the hook 72. During this movement, the hook carrier 77 is vertically guided by cylindrical vertical guide rod 78 to which the hook carrier is secured, the guide rod 78 sliding vertically in the yoke 5 fixed to the telescopic nozzle 33 and is firmly connected to a sliding sleeve. 79, which slides on the cross plate guide 55 · The device is the same for the other hook. Thus, a very precise control of each hook is obtained.

8 144237

In order for the telescopic nozzle 33 to be adjusted in the most advantageous manner within the neck 3 of the bag, it is necessary to form in the nozzle wall a vertical groove 80 in which the hook 72 can pass.

At the end of this first descent step, the hooks 72 are located at the upper portion 6 of the neck 3 and within it, at each end of a diameter of the neck. They lie between the two gripping bores 30 and 31 of the neck. When the bag is filled, the preparation of the neck 3 for welding begins after the telescopic nozzle 33 has been brought up again and the gripping bows 30 and 31 are disengaged. At the same time, a maneuvering cylinder 8l, which is attached to the support of each hook, moves outwardly along the edge of the neck, while the maneuvering cylinders 76 belonging to the second descent step move again the hooks downwards so that they can remain in contact with the edge of the neck.

Thereafter, the neck is welded by means of two rectilinear welding jaws 82 (cf. Fig. 7), which are arranged horizontally relative to each other and parallel to the two adjacent walls which the neck 3 exhibits after the preparation, ie. parallel to the vertical plane in which the hooks72 move. These two welding jaws, located at the top of the treatment chamber 13, can be brought together against the neck by two maneuvering cylinders 96, operating horizontally somewhat lower than the level at which the hooks 72 moving.

FIG. 7 shows a cross section of one of these welding jaws. Inside a longitudinal U-beam 83, the opening of which is directed towards the neck of the bag, a longitudinal welding strip 85 is insulated by means of heat insulating material 84. Within the welding strip 85 is a longitudinal electric heating element 86 which is fixed by by means of a longitudinal strip 87 which, like the welding strip 85, consists of a material with high thermal conductivity.

The active portion of the weld strip 85 projects from the U-beam 83 and is provided at the point where it can touch the material to be welded with a welding rod 88 consisting of a material capable of transferring the required heat to the welding site. and which can be easily released from the welded material before being cooled.

In the case where bags of 1 mm thick polyethylene are used, good results have been obtained by using PTFE welding rods with a filling of conductive material such as bronze, heated to the melting point of the polyethylene film, ie. 130-150 ° C. The welding rods are pressed against the neck of the bag with a pressure of the order of a dozen kg / cm.

g 144237

The welding rods 88 first cause the polyethylene walls of the bag to melt and penetrate them under the influence of the maneuvering cylinders 98.

They are formed with profile 88a, 88b in a manner that causes the flow of the molten material to contribute to this being welded, e.g. in the areas 101 of the throat 3rs clashing walls (Fig. 8). The penetration can be up to several times 10 mm until it is limited by longitudinal abutment strips 89 which are secured to the sides of the U-beams 83. When sufficiently close together, they effect the welding itself. Such an operation makes it possible to weld walls of large thicknesses.

A support strip 94 is inserted between the welding strip and the insulating material 84 at the bottom of the U-beam 83, to distribute the pressure over the insulating material. Further, a strip of resilient material 95 such as foam rubber is inserted between the bottom of the U-beam 83 and the heat insulating material 84 to extend the welding operation by applying a slight pressure after the impact strips 89 come into contact with one another.

After the welding operation, the filled and hermetically sealed bag can be placed in free air. Thus, a valve 90 and 91, respectively, makes it possible to connect the interior of each treatment chamber 13 and 14 respectively to the atmosphere.

The example described machine is provided with a mechanism for removing the filled and sealed bags. Next to each treatment chamber 13 and 14, respectively, a suction plate mechanism is provided for gripping and controlling the bags. Each of these mechanisms, e.g. the one belonging to the chamber 13 consists of a foot 97 and a vertical suction plate 28 mounted on it, which can be rotated about a vertical shaft on the foot 97 · The foot 97 slides on two horizontal rails 98 and 99> which are generally perpendicular to the door The horizontal guide rods 22 and 23 of the 20 · The mechanism is arranged so that the suction plate 28 can engage the side of the bag which is released from the carrying basket 27 when the cover 20 is open. A horizontal maneuvering cylinder 100, operating between the machine frame and the foot 97, guides the longitudinal movement of the foot to the carrying basket, the suction plate gripping the bag. By a subsequent rotation of the suction plate 28, the bag can be moved to a position where it can be removed.

The various working phases of the machine are as follows:

The bags 2 supplied by the supply chain 1 are manually removed from the latter and inserted with their neck 3 on the lower end 8 of the vertical air supply pipe 7- As mentioned above, a micro-contact placed on the pipe 7 causes the dressing ring 10, placed around the lower end 8 of the tube J is inflated. The clamping ring 10 engages the inside of the neck and holds it to the tube 7 throughout the blow-in operation.

The bag is also held by the clamping ring 10 until it is placed in place in the machine's carrying basket 27 · As explained above, this positioning takes place by the tube J sliding on the guide rods 11 and 12, which puts the bag in position above the carrier basket 27, after which the tube 7 is extended telescopically so that the bag is carried into the carrying basket.

Now that the bag is in place in the carrying basket, the maneuvering cylinders 4-1 and 42, which actuate the swing arms 43 and 44, respectively, engage the gripping arcs 50 and 31 to a position above the upper part 6 of the neck 3 of the bag 2, the inner clamping arc 35 not inflated. Thereafter, the cylinder 50 maneuvers the transverse bar 45 downward and at the same time the two gripping arcs 30 and 31 * which engage the upper portion of the neck 6. Then the clamping arcs 35 are inflated to grip the neck and hold it in position. Thereafter, the air can be released from the clamping ring 10 on the telescopic blow-in pipe 7 and the pipe 7 is again directed upwards. Thereafter, the lid 20 can be closed by the maneuvering cylinder 26. By its closing movement it includes the carrying basket.27 and the bag, at the end of the closing movement the neck of the bag will be located immediately below the lower part of the discharge pipe 18. The movable plate 29 acting as a gate, which is moved by a cylinder not shown, then closes the open side 32 of the carrier basket 27 in order for the bag to be properly guided in the carrier basket.

At this moment, the second treatment chamber 14 is pumped out if the two halves of the machine operate alternately, and the valve 57 can then be opened for equalization of the depressions in the two treatment chambers 13 and 14. This results in a saving in suction power, since it is in all cases it is necessary to restore atmospheric pressure in chamber 14 before opening.

Then, the telescopic nozzle 33 of the discharge tube 18 is moved downwardly under the action of the maneuvering cylinders 52 until it engages the neck of the bag 3. At the same time, the two hooks 72 perform the first part of their downward movement under the action of the cylinders 73 and come into contact with the edge of the neck. 6th

Thereafter, the equalizing valve 57> is closed, then the damper 63 is opened to connect the treatment chamber 13 to the vent and weighing chamber 15 in 1, which maintains a negative pressure by the pump 93 · On. at this time, the material intended for processing in the hopper 67 has already been sufficiently long in the chamber 15 to have been vented; it is thus ready for treatment.

144237 11

The closure flap 69 is then opened and the material intended for treatment falls into the interior of the bag, in an amount predetermined by the weighing in the chamber 15, before the damper 63 is opened. The bag fills quickly and without dust due to the maintained vacuum and the small distance between the outside of the telescopic nozzle 33 and the inside of the throat 3 * During filling, the vibrator 92 which shakes the material in the bag is started, allowing flat sides to be obtained. which is close to the walls of the support basket 2j.

When the bag is full and the weighing hopper 67 is empty, the fill-closing flap 69 is closed again, and then the connecting damper 63.

Thereafter, a new weighing can be made in the chamber 15, opening the metering damper 62 to connect the filling hopper 61 with the weighing hopper b7. Since the outlet of the filling hopper from which the filling hopper 6L receives material for treatment is controlled in such a way that the hopper always kept full, the vacuum losses' at this material input are minimal.

The filled bag located in the chamber 13 is then welded across. In advance, the maneuvering cylinders 52 have again moved the telescopic nozzle upwardly, the clamping arcs 35 of the grippers 30 and 3l have been vented, and the grippers have been moved to their resting positions under the influence of the maneuvering cylinder 50 which releases them from the engagement with the neck 42 and the maneuvers 42 which moves them outward. It should be noted that the venting of the clamping arcs 35 must be effected by suction as it is necessary to counteract the vacuum prevailing in the chamber 13. Thereafter, the vertical maneuvering cylinders 76 hooks 72 simultaneously downward, while the horizontal maneuvering cylinders 8l influence the hooks to pull at the edge of the neck. The throat is thereby deformed and at the end of this preparation operation exhibits two adjacent walls which can then be welded together by the rectilinear welding jaws 82.

As explained above, the two welding jaws are brought against each other by means of horizontally acting maneuvering cylinders. In a first stage of work, they penetrate the wall of the neck of the bag as they melt this wall until the impact strips 89 come into contact with the wall. Then, in another working step, the welding jaws are sufficiently close to each other to contribute to the welding of the two adjacent walls.

Once the bag is sealed, it is easy to remove the welding jaws from the welding engagement by means of their maneuvering cylinders, as they are made of a material that prevents any adhesion.

12 1 / U237

Since the gasket is now sealed under vacuum, it is possible to restore atmospheric pressure in the chamber 13- Advance - for economic reasons - the relief valve 57 is opened to create a first partial vacuum within the chamber 14, which alternates with the chamber. 13 · At the same time, the vertical maneuvering cylinders 73 and 76 of the hooks 72 move back to their upper position, while their horizontal maneuvering cylinders 8l move them back into place in the grooves 80 of the telescopic nozzle 33 · If the vacuum in the chambers 13 and 14 is equalized, close again balancing valve 57. » whereupon valve 91 opens and connects chamber 13 to the atmosphere.

After the inner door 29 has been removed, the door 20 can be opened by the maneuvering cylinder 26. To open the door 20, the door 20 includes the carrying basket 27 and the filled and sealed bag out of the chamber 13.

Then, the maneuvering cylinder 100 displaces the suction plate 28 to the filled bag, bringing the suction plate to abutment against the free side of the bag. A vacuum is created between the suction plate 28 and the wall of the bag against the suction plate, a maneuvering cylinder lifts both, and then the suction plate support foot 97 is returned to the starting position by the cylinder 100. Then the suction plate 28 is rotated on the support foot in such a manner. moving the bag to a discharge zone, after which the bag is released by restoring the atmospheric pressure between the suction plate and the bag.

All work operations take place practically without dust. In fact, the material supply to the weighing chamber is effected by the suction of the material intended for treatment so that no dust is avoided and the bag is also filled precisely in the manner described above.

Thus, the method according to the invention makes it possible to reduce the losses to a minimum. It has also been found to be particularly important in cases where it is desirable to treat material with very small grain sizes, or toxic materials whose treatment by the known methods is dangerous to the service personnel.

When using a machine of this kind, a filling rate of up to one bag per bag can be obtained. minute. In principle, the two halves of the machine are intended to be able to work at the same time, but separate automations have been provided for each of them, so that they can work in the same way separately.

Claims (4)

13 144237 Patent Claims. A method of treating low-bulk, bulk grain masses in vacuo and in a bag of soft material which is of the kind in which the vacuum bag is filled with the pre-vented and weighted mass and sealed, characterized in, that at least during the filling, at least part of the outside of the bag is brought to abutment against at least one plane and rigid wall, and that the bag here is subjected to a vibration which causes a shaking of the bulk goods. Process according to claim 1, characterized in that the bag is inflated before being filled under vacuum. The method according to claim 1 or 2, wherein the bag used is of the kind in which its interior is accessed through a neck, characterized in that the bag is held at the height of the neck during filling. Machine for carrying out the method according to claims 1-3 and arranged for filling under vacuum of a bag of soft material defining a closed volume accessible through a neck of the bag, which machine is of the kind having a (a) a first chamber which can be put under vacuum and is designed for venting and balancing the goods to be treated; (b) a discharge tube for the goods contained in the first chamber; and (c) a second chamber which can be put under vacuum. and wherein the discharge tube opens, which second chamber is arranged to receive the bag to be filled, and is provided with means for sealing the filled bag, characterized in that the second chamber has flat and rigid walls defining a bag. open at least at its upper part, which is adapted to support the bag in such a position that its neck is under the discharge pipe, which also is adapted to hold the bag by at least part of the bag. of the outside thereof, the chamber further having means for applying a vibration movement to the whole or part thereof.