FR2481671A1 - DEVICE FOR FILLING AND SHUTTING BAG FOR PACKAGING MACHINE - Google Patents

Abstract

THE PRESENT INVENTION RELATES TO A DEVICE FOR FILLING AND CLOSING A BAG FOR PACKAGING. ACCORDING TO THE INVENTION, A PUSH-BUTTON 1 DRIVES AN ARTICLE INTO THE OPEN BAG 2, AND IT INCLUDES SLOTS TO ALLOW THE BAG DEPLOYING ORGANS 7 AND POSSIBLY A TUBING 8 TO ADVANCE FIRST LATERAL THEN AXIALLY IN THESE SLOTS , AND TO ALLOW THE PUSHING BODY TO REMOVE, LEAVING THE DEPLOYMENT BODIES IN THE BAG TO MAKE THE NECK OF THE latter INTO A SENSITIVELY FLAT AND ELONGATED MOUTH; AS THE PUSHING BODY 1 IS REMOVED TO BEGIN A FILLING CYCLE OF A NEW BAG, THERE IS INCREASED OPERATING SPEED, ESPECIALLY IF THE ITEMS ARE 20KG FORMING BLOCKS. THE INVENTION APPLIES IN PARTICULAR TO THE PACKAGING OF FOOD PRODUCTS.

Description

The present invention relates to a combined device for filling and

to seal a bag, to be used for

  packaging of articles in plastic bags.

  The term "bag" is meant to indicate any open-ended, bag-shaped flexible container without limiting the present invention to a particular type of bag-shaped container. The present invention may, for example, also apply to gusset bags and gussetless bags. The bags used with the device may for example be multilayer bags having at least one layer for imparting to the bag, a mechanical strength and / or at least one layer to impart to it an ability to seal by thermal welding and / or or at least one layer forming

impermeable barrier to gases.

  In packaging machines, it is known to provide dry filling devices which take an empty bag and hold it while a product is inserted therein. It is normal for an article to be inserted into the bag by a mechanically actuated pusher which has reciprocating between a first withdrawn position o an article can be introduced into the space between the pusher and a bag filling table and a second extended position where the pusher has advanced this item on the

  filling table and in the open bag.

  When the bag has been loaded or filled in this manner, it is traditionally advanced either by an extended movement of the pusher itself or by a means of transport, to a subsequent filling station. An example of such a system can be found in the British patent

  N 1.516.498 where the inside of the bag is subject to

  Atmospheric packaging in the form of an evacuation

through a hollow pusher.

  Such bag filling means prepares it for use with a closing operation by squeezing or stapling or binding, most suitable for use with the disclosed poultry product, but does not permit the preparation of a filled or filled bag for

  heat sealing between clamping bars and

  tough. The present invention relates to a perforated system for filling and closing a bag for use with heat sealing, for example when the article may be in the form of a block or in the form of a relatively flat product (for example stacked or individual slices of a food such as cheese

or sliced meat).

  Accordingly, the present invention relates to a device for filling and sealing a bag, which comprises means for holding an open bag ready to receive a product; a thrust member driven for reciprocating movement along a path between (a) a first

  position where it is removed behind the filling station

  wise of the bag and can receive an article produced between this first position and the open mouth of the bag held by its holding means and (b) a second position where it moved the article or product in an open bag on the means of maintaining the bag; bodies deploying the bag placed symmetrically on the path of movement of the pushing member between its first and second positions, and driven for a movement towards and away from each other between laterally advanced conditions which correspond with the movement path of

  the pushing member in its second position and a condition

  laterally removed when they are away from the path of movement of the thrust member, and also for movement in a direction parallel to the direction of movement of the thrust member between an axially advanced conditoon inside the mouth of a bag surrounding the push member at the second position thereof, and a condition axially withdrawn away from this mouth of the bag; slits in the urging member to allow the movement of the organs deploying the bag between their laterally withdrawn condition and their laterally advanced condition; parallel sealing bars for closing the mouth of a bag with heat, and for pressing this mouthpiece into a substantially flat configuration enclosing the members unfolding the bag when they are in their axially advanced state and the organ thrust is moved away from its second position; and an atmospheric conditioning means effective to apply suction and / or to introduce a flushing gas into a bag held on the

Organels unfolding it.

  With such a device, the filled bag can be closed with heat or without atmospheric conditions either on a table filling the bag or just beyond the 9th tr of this table, the movement of the bag towards the table. OVTUREION AND / OR CONDITIONING OF THE ATMOSPHERIC ENVIRONMENT IS PREFERRED OBTAINED BY MEANS OF THE POLYMER BODY, THE FILLING MACHINE OF THE BAG.

  evacuation, and the tubing of condemnations acmos-

  The hydrochloride includes a tubulic acid in co nication with a depression. we. Alternatively, the atmospheric condition may be a gas rinse and the tubing may be contacted with a gas source.

  rinsing One can use, if desired, a combination of

  gas flushing and at least partial evacuation of the interior of the bag, the organs unfolding the bag may be capable of being introduced laterally by a movement 1 one towards the other in lateral evidemnts of the thrust member, and removed or extended by axial movement along the direction of the movement path of the thrust member; In another arrangement, the members deploying the bag may be effective to deploy its mouthpiece in a substantially flat configuration while it is folded into gusset configuration, and in this arrangement, it can

  to have four organs deploying the bag forming an agency-

  rectangular, with a pair spaced on each side of the major axis of the rectangle and one of the bars of each pair to one side of the minor axis and the other bar of each pair on the other side of that axis minor, and one can provide two bodies folding the bags to be movable towards and away from each other along this major axis of the rectangle defined by the two pairs of deploying organs. Suitable recesses for the deployment members and the folding members may be provided in the pusher to allow for lateral insertion and

withdrawal with respect to this pusher.

  The device may be adapted to operate such that the pusher retracts prior to extension of the deployment members, if provided. Alternatively, the pushing member can begin to tighten at the same time

  time that the deploying bodies begin their movement

  separation. It is advantageous that the thrust member withdraws before the operation of the deployment members, and at least before the atmospheric conditioning step, so that the thrust member can withdraw to its first position mentioned above to allow the setting up another article and another bag for filling while the first bag mentioned

  which is filled, is deployed and atmospherically conditioned.

  Means may be provided for adjusting the stroke of the urging member so that this member always moves the article or product towards the closed end of a bag at the loading or filling station, thereby permitting

  digositive to be adjusted to take into account differences

  bag lengths and different dimensions of the article while giving absolute accuracy in setting up the atmospheric conditioning tubing and

  deployment units, if provided.

  The invention will be better understood, and other purposes,

  characteristics, details and advantages of it appear

  more clearly in the explanatory description

  which will follow with reference to the accompanying schematic drawings given solely by way of example illustrating more embodiments of the invention, and in which: - Figure 1 is a schematic perspective view showing a bag deployed at the filling station and the pushing member about to introduce an article into the deployed bag; FIG. 2 is a diagrammatic perspective view showing the position of the various elements of FIG. 1 when the pushing member advances the product into the bag; FIG. 3 is a diagrammatic perspective view showing the same position of the bag and the thrust member, but with the atmospheric conditioning tubing and the deployed deployment members at a position where they are ready to be moved axially in FIG. pushing member; FIG. 4 is a schematic perspective view showing the position of the atmospheric conditioning tubing and the deployment members after their advance in the recesses of the thrust member, FIG. 5 is a schematic perspective view showing the subsequent configuration. of the bag when the deployment members thereof have deployed its frog tip in a substantially flat configuration leaving the atmospheric conditioning tubing in position between the upper and lower layers of the mouthpiece of the bag.

  bag, while the pushing organ began its movement

  withdrawal prior to the introduction of the next item in a bag; and FIG. 6 is a diagrammatic and elevational view illustrating a folding action of a bag gusset in

  another embodiment of the device according to the invention.

  Referring now to FIG. 1, there can be seen the bag 3 deployed on two members 4 holding it, which hold the mouth of this bag open and in a rectangular configuration, ready for the introduction of a product 2 by means of the movement the thrust member I to the left, Above the bag is an atmospheric conditioning tubing 8, in this case a flat tubing communicating with a source of depression

  to extract the air from the inside of the bag, before the operation

  shutter, in order to present a package

  empty in the bag 3, of the parallel-shaped article 2

rectangle pipede.

  Along the bag 3 are two flat deployment members which comprise cylindrical support bars and end plates 7 defining flat members engaging the bag which, during the movement of deployment of the members 7 by a movement of these members, lorng of the common axis of their cylindrical portion 6, deploy the mouth of the bag in a configuration

  substantially flat, ready for sealing.

  To the left of the bag filling table 5 is a roller conveyor 10 on which the closed package rests and evacuated before the evacuation, when

  the opâation of filling of the bag is finished.

  FIG. 2 shows the elements of FIG. 1 at the end of the filling phase of the bag, when the thrust member 1 has advanced the product 2 initially in the open bag 3 to the filling station B of the bag and then beyond, driving the bag for a movement away from the holding plates 4a and on the conveyor to

  rollers 10 at station C closing the bag and conditions

atmospheric

  When the pushing member 1 arrives at the position illustrated in FIG. 2, the two holding members 4 are always in the positions of FIG. 1 as are the atmospheric conditioning tubing 8 and the two deployment members 7. Meanwhile , the bag has arrived at a position where its mouth 3a is always held in order to define an open mouth (by the action of the push member inside the bag), and is in line with the closure members , in this

  upper and lower horizontal bars of

ration 14 and 15 (see Figure 5).

  At the position of FIG. 3, the pusher 1, the article 2 and the bag 3 are all in the same position as that of FIG. 2, but the two deployment plates 7 on their respective cylindrical actuating rod 6 have moved along the direction of the arrows coli and in the opposite direction 1a, 1b, teandis that the tube of Atmospheric Conditioning 8 is descended by an axial movement of its actuation tube 8a along the direction of the arrow tlc Of this oo2igurationq the two plates 7 and the tubulure 8 are e -e'beVea aligned with aces d'idents correspondanla l. eit lo the pusher l. We shall describe here the geometry and the distance of these ejections from each other. 3 and the position of FIG. 4, the plates 7 and 8 of the conduction tube 8 are separated from the parallel directions illustrated by plates 12a, 12b and 12c, which extend along the length of the tube. ddetio u, uemen alterPnatif of the organ de pouesse 1o These water organs deployant the bag and tubing of oncditSionnement e> tosphrúque are reivs to n2e posiion fú1atel o. they are received in the recesses respeotiús-J bI and 10o At this stage, the function of the thrust orgame is completed, and the air conditioning tubing 8 and the two organs de déploiemernt 7 have been introduceddans the mouth

  open defined by the collar 3adu bag.

  In order to improve the shape of the cycle of the device for filling and closing a bag according to the present invention, the thrust member 1 is withdrawn beyond the

  organs deploying the bag 7 and the condition tubing

  8 to the configuration shown in FIG. 5 where the pushing member always undergoes its withdrawal movement towards the arrival station of the product A and at the moment represented in FIG. In the meantime, the bag 3 with the article 2 that it contains still rests on the roller conveyor 10 but the

  previously opened neck of the bag was flattened into a confi

  substantially elongate and almost closed mouthpiece guration with the flat 8 atmospheric conditioning tubing close to the center and the bag deployment members also plait7 on each side of the tubing 8. In this position, the neck 3a is almost ready for the process evacuation to begin;

  however, this requires powering up the

  mouth of the sacce that is obtained by removing the two

  deployment organs 7 far apart from one another by movement

  of their support rod 6 along the collinear and opposite directions represented by the arrows 13a and 13b, until the tension of the mouth of the bag is sufficient to stop a more

  ample movement of the organs of deployment.

  The stopping of the deployment organs at their final position may be either under the tension of the bag

  actuating a limiter of some kind, or simply

  by adjusting the apparatus to deploy the two edges of the neck of the bag to a given spacing able

  with the size of the bag being handled. naturally

  the fact of relying on the tension in the neck of the bag has the advantage that when changing the size of the bag, no adjustment of the lateral movement of the deployment members 7 is required because the tension in the neck of the bag will automatically stop the movement of separation of the organs of deployment

  when they have done the desired action.

  Figure 5 also shows upper bars

  and lower14 and 15 clamping and obturating

  bely, which have resilient insertion pieces (not shown) extending along their length, on the cooperating clamping faces, so that the flat atmospheric conditioning tubing and the two flat deployment members can be received between the two bars 14 and 15 by virtue of the compressibility of the elastic insertion pieces. When the deployment members 7 and the tubing 8 are moved away from the clamping and sealing bars, the elastic insertion pieces in these bars 14 and 15 come closer together.

  keep the mouth of the bag closed.

  At the end of the arrival at the configuration of the figure, a depression is applied to the tubing by its hollow actuating tube 8a, and thus the air in the bag 3 is extracted before finally a thermal pulse is applied in the contact areas between the upper and lower bars 14 and 15 and the superposed layers of the neck of the bag defining the mouth

that can be seen in Figure 5.

  The shutter operation can be performed in two stages so that before removal of the two deployment members 7 and the tubing 8 from the mouth of the bag, the areas of the flat mouth so far in contact are closed off and then the tubing 8 and the plates 7 can be removed to allow the last zones of the superimposed layers of the mouth of the bag of Ctre, pressed in contact and obturéso Preferably, the action c tobturation is delayed until that the tubing 8 and

  plates 7 were removed (after evacuation) and the ob-

  turation then takes place simultaneously over the entire length

the neck of the bag.

  The two deployment members 7 and the tubing 8 are initially withdrawn in an axial withdrawal movement (i.e. in opposite directions to the three arrows 12a, 12b and 12c in FIG. 4) and then are separated by a movement. lateral withdrawal along opposite directions to those illustrated by the arrows 11a, 11b and 11c, and the advance path of the article is released so that the following article 2 can pass from its supply station A to to the roller conveyor 10 at the closing station C without impacting against the two deployment members 7 or

tubing 8.

  While the evacuation and sealing step is carried out in the manner shown in FIG. 5, the thrust member 1 completes its withdrawal movement to arrive behind the supply or supply station of the 3 articles, ready for a commitment with the next article and to drive this article forward, towards the 4 bag keeping organs o will then be deployed a

  bag new to the configuration of Figure 1.

  If desired, more than one atmospheric conditioning tubing can be used. This can either comprise two separate tubes 8 or more arranged

  symmetrically in relation to the action line of the movement

  1 of the thrust member 1 (that is to say symmetrically with respect to the axis of the actuating rod 9 of the pusher 1) or the two members 7 for deploying the bag may be hollow in order to also perform a certain function of atmospheric conditioning (for example by applying suction or introducing an inert gas into the bag). For example, the tubing 8 can be used to extract air from the inside of the bag 3 while an inert flushing gas is introduced into this chamber.

  bag by the hollow organs 7 of deployment.

  In another possible arrangement, the tubing 8 may serve as a flushing Raz injection tubing in the case where the interior of the pack is not to be

  under vacuum but must be in a conditional environment

  consisting of a gas (eg nitrogen) that is chemically inert to the article contained

in the packaging.

  Various configurations may be envisaged for the two side slots 1a and 1b of the pusher 1, provided in each case that they allow the deployment members of the bag to enter the pusher 1 from the rear, to leave this push 1 by its side area during the deployment action of the bag, and not to obstruct the pusher 1 while it withdraws while the mouth of the bag is maintained in the configuration of Figure 5 by means of two bodies

Deployment 7.

  The upper slot 1c of the pusher 1 must be capable of allowing the atmospheric conditioning tubing 8 to enter the thrust member from behind, and to leave this thrust member from the front while it is withdrawn with respect to the tubelle of atmospheric conditioning inst ered then stationary to the situation of figt e 4o This slot is open upwards so -0 to ed-maintain the maintenance of tubing 8 by its tubae of Riese in action Sa during the núvement of this tubing su2- all the lugueur of the slot 1o, Co50e can be seen in Figures 1 to 5, the three fées la, lb and 'sétesndlent eacune on 1'1nng the barge thrust, and for ease the bottom The lateral grooves 1a and 1b are cut for this purpose and have a very strong thrust body with the two deployment orgyass 7 and a folding system in the following position: see FIG. 60 Brien where it is not possible. either pa s mentioned above, the various actuators for the moving components, in this case the rod 9 of the thrust member 1, the rods 6 of the two deployment members 7 and the tube Sa actuation of the tu In the case of atmospheric conditioning, they are entrained by suitable pistons or drive mechanism shafts. When these miss members in action are driven by pistons, the rods / tubes 6, 8a and 9 may themselves be the rods of the pistons The timing of the movement of the pusher I relative to the activation of the deployment members 7 and the atmospheric conditioning tubing 8 may be modified, although in practice it is preferred that the pusher 1 be removed before the deployment members 7 have completed their bag deployment action, in order to thus ensure that the neck 3 of the bag will not pull on the upper edges of the pusher 1, with the risk of tearing the bag. The ideal situation is that the pusher member is removed as early as possible in order to initiate the next bag filling cycle as soon as possible, but while ensuring that the pusher member 1 will remain in position at the same time. less until both the deployment members 7 and the conditioning tubing 8 have completed their axial advance stroke from the position of Figure 3 to that of Figure 4 to ensure that the neck 3a will be placed correctly relative to the clamping and closing members 14 and 15 before the pushing member is removed. However, if desired, the withdrawal of the thrust member can begin just before the end of the axial advance movement of the deployment members and the atmospheric conditioning tubing along the lines of action of the arrows 12a, 12b and 12c from the position

  from Figure 3 to that of Figure 4.

  Finally, the closed bag 3 containing its product 2 is shipped from the filling station either by driving the rollers 10 in the case of an active roller conveyor or by another transport mechanism in the case of a passive roller conveyor or other transportation system. Although it is not essential in the context of the present invention, the two holding members 4 retreat well away from the path of the movement of the thrust member 1 after having finished their maintenance function

  of the bag illustrated in Figure 1, this movement of separation

  tion may be advantageous if it is desired to be able to change the size of the thrust member, for example to take account of different dimensions of bags and

product widths.

  Moreover, although in the particular embodiment described above, the closing station C is separated from the filling station B by the fact that the thrust member 1 drives the bag away from the holding members 4, it it is also possible to provide a stop of the advance movement of the thrust member when the article 2 is in the open bag 3 and then to separate the bag from the holding member 4 by removing it while the stationary thrust member 1 pockets the bag 3 and the article 2 to retreat.

  Although in the typical embodiment illustrated

  In FIGS. 1 to 5, only one air-conditioning pipe 8 and two deployment members 7 have been used. Of course, it is conceivable to omit the deployment members and to rely on the fact that the pressure action two bars 14 and 15 of Figure 5 will be sufficient to flatten the mouthpiece

of the bag.

  The supply of bags to the filling station B may be in any conventional form, for example a chain of nested bags connected by ribbons or a pile of sacks. The opening of the bag may be accomplished automatically by inflating air jets. or the bags can be individually placed on the holding members 4, if required; the latter

  step will tend to slow down the device cycle.

  Articles or products 2 shall be brought to Feeding Station A by any appropriate means of transport,

or by hand.

  The length of the thrust member 1 is preferably always greater than the difference between the length of the

  bag and the length of the product, so that the party the.

  further back of the pushing member (ie the

  closest to its actuating rod 9) is always outside the bag. For this reason, if a number of different bag lengths and product lengths are required, the pusher member 1 will be arranged to have a fixed length greater than the greatest anticipated difference between the length of the bag and the length of the bag.

bag and the length of the product.

  The cross section of the thrust member is sufficiently wide to define the slots in which

  the deployment organs are received.

  The width of the thrust member 1 will be smaller than the width of the product so that the thrust member can always push the product into the bag without the size of the bag must be large enough to

  receive a pushing member larger than the article.

  This is to ensure that the limiting factor on the smallest possible dimension of the bag will be. The circumference of the article and not that of the organ

thrust.

  Among the advantages of the machine illustrated in the drawings, with respect to the bag loaders and the evacuation machines known in the prior art, it can be mentioned that since the pushing member 1 can always execute a given stroke without fear of engaging the tubing 8 or the deployment bars 7, the rear end of the article 2 is always placed in a precisely known position so that the atmospheric conditioning tubing 8 can always be brought to a posit.on to its optimal space relative to the back of item 2 when tubing 8 has moved to the position of Figure 4. In this way, there will be no difficulty in matching the seal location. shutter, formed by the bars 14 and 15, with respect to the periphery of the mouth of the bag or the position of the atmospheric conditioning tubing 8 to the configuration of Figure 5. This gives usnonly a much more reliable implementation of u seal or closure, but also a much more efficient use of atmospheric conditioning resources due to the small volume of the inside of the bag behind the line of the clamping action of bars 14 and 15 (ie 2 to the left of these bars looking at Figure 5). In the case of evacuation inside the bag, or in the case of atmospheric conditioning by an inert gas rinse, the vacuum volume resulting from the optimal position of the article 2 with respect to at bars 14 and 1b. is

2 4816 7 1

a significant economic factor.

  The device illustrated in the drawings is particularly

  It is also suitable for packaging articles such as cheese blocks up to 20 kg. Other bulky products can also be particularly advantageously treated using this device. If the formation of a gusset fold is to be formed! When the shutter 9 is closed, the clip can be changed slightly, and the picture, 1 0, will appear along the direction of the line of action. The push rod is attached to the pusher (but does not seat all the components, except for the atoi-behri.cue packaging tubing and the deployment of a mouthpiece (see Fig. 1)). FIG. 6 shows an upper air of deployment bars 16a and 16b spysymmetrically on each side of the center 21 of the suction pipe 8, and a lower pair of corresponding deployment bases 17a and 17b, of new -u iposté chaue1 side of the center 21 of the tubing 3. and direotement below the bars 16a and 16b of the first pair. The bars 16a 16b, 17a and 17b thus define the corners of a rectangle having a major horizontal axis and a minor vertical axis. Two folding members 18a and 18b are placed at a Emichemin level between the upper and lower pairs of members. 16a, 16b and 17a, 17b (that is to say on the major axis u rectangle), and they are trained so ttrxe always arranged symmetrically each summer

from the center 21 of the tubing 8.

  Figure 6 shows the movement of various organs

  part of their deployment work.

  is lying. Initially, the deployment bars of the upper and lower pairs 16a, 16b, 17a, 17b are all closer to each other than in FIG. 6, and the folding members 18a and 18b are more separated, to a space which is greater than to the space between the bars 16a and 16b on the one hand and 17a and 17b on the other hand The two folding members 18a and 18b move inwardly along the directions of the Arrows 20a and b respectively, while the upper and lower members 16a, 16b and 17a, 17b move away from each other along the direction of the arrows 19a, 19b and

19c, 19d, respectively.

  If, possibly, the deployment bars 16 and 17 are at their maximum space and the folding bars 18a and 18b are at their minimum space, the mouth 3a

  the bag will have been fully stretched and folded into a

  with gusset, ready for filling.

  In FIG. 6, the vertical space between the upper and lower pairs of bars 16a, 16b on the one hand and 17a, 17b on the other hand is exaggerated in order to illustrate more clearly the way in which the operation of folding in gusset. In practice, however, the top and bottom deployment bars will be at one space

vertical lower.

  When the gusset folding action is completed, the closing bars 14 and 15 of FIG.

  bring together to squeeze the upper and lower layers

  overlapping the bag Sa in contact with the six deployment bars 16a, 16b, 17a, 17b and 18a,

18b on the tubing 8.

  Although closing the bag in the mode of

  As described above, either by means of a heat seal, any other closing action (usually without the deployment member 7) may be employed; for example, the bag can be pinched or tightened after removal

  an atmospheric conditioning tubing.

  Of course, the invention is not limited to the embodiments described and shown which have been given by way of example. In particular, eLe comprises all the means constituting technical equivalents of the means described, as well as their combinations, if they are executed according to its espit and implemented in

  the framework of protection as claimed.

Claims (8)

R E V E N D I C A T IO N S   1. Device for filling and sealing bag: a type comprising means for holding an open bag to receive a product; a biasing member driven for reciprocating movement along a path between (a) a first position where it is withdrawn behind the bag filling station and where it can receive a product between its first position and the open mouth of the bag; a bag held by said holding means and (b) a second position where it has moved the article into an open bag on said bag holding means "and an effective atmospheric conditioning tubing for applying suction and / or introducing a rinsing gas into a holding bag on said holding means, and means for closing said bag with the article therein, after operation of said atmospheric conditioning tubing, characterized by deployment members (7) of the bag placed symmetrically around the movement path of said pushing member (1) between its first and second positions; in that said deployment members (7) are driven for a movement towards   and off of each other between lateral conditions-   advanced where they correspond to said path of movement of said thrust member (1) at its second position and a   laterally removed condition where they are far from the movement   said thrust member (1), and also for a movement in a direction parallel to the direction of movement of said thrust member (1) between an axially advanced condition inside the neck of said bag (3) surrounding said body member. pushed to its second position, and a condition axially withdrawn away from said neck of said bag; by slots (la, lb) in said thrust member   (1) to allow the movement of said deployment organs   (7) between their laterally withdrawn condition and their laterally advanced condition; and in that the means 1 & sealing the bag comprises parallel sealing bars (14, 15) for heat sealing the neck of a bag (3), and for pressing said neck of said bag into a configuration substantially plate enclosing said deployment members (7) when in their axially advanced condition and said thrust member   (1) is away from its second position.   2.Device according to claim 1, characterized in that the atmospheric conditioning tubing (8)   aforementioned is movable in a first perpendicular direction   to the direction of movement of the aforementioned thrust member (1) between its first and second positions, for movement between a laterally withdrawn condition where it is far from the path of movement of said thrust member (1) and a position laterally advanced o it is in the path of movement of said thrust member; in that said tubing (8) is also movable in a direction parallel to said path of movement of said thrust member for movement between a condition   axially advanced where it corresponds to the second posi-   said thrust member and an axially withdrawn condition where it is withdrawn behind the second position of said thrust member; and in that another slot (1c) is formed along said thrust member (1) and is arranged so that during a relative axial movement of said thrust member (1) and said atmospheric conditioning tubing (8) while said tubing (8) is in its laterally advanced condition, said tubing may enter through the end of said other slot (1c) and pass to a position where it   can condition the atmosphere in said bag (3).   3. Device according to claim 2, characterized in that the aforesaid atmospheric conditioning tubing (8) is connected to a support member (8a) which extends   parallel to the direction of movement of said tubular   between its laterally withdrawn and laterally   and in that the other slot (1c) mentioned above in the abovementioned thrust member (1) opens in a lateral face of said member (1) to allow said support member (8a) for said tubing (8) to passing through said open face of said thrust member (1) during the relative axial movement of said tubing and said thrust member;   L4Dispoositif sealon any of the claims   2 or 37 isterotized @n that) first fentEsmention-   Said abutments (1a, 1b) for receiving the aforesaid injector members (7) are formed in opposite sides of the abovementioned thrust member (1) and in that the abovementioned slot (1) for receiving the tubing The above-mentioned damping agent (8) is formed at%. Such a device is designed with the proviso that the above-mentioned atmospheric conditioning tubing (8) is driven for one cycle. first, first, a lateral advance movement between the laterally withdrawn condition and the lateral condition. Secondly, secondly, an axial movement between the condition axially withdrawn and the condition axially avacated, thirdly, a retr motion; lateral arrangement between the laterally advanced condition and the laterally withdrawn condition, and fourthly a movement = axial withdrawal between the axially advanced condition and the axially withdrawn condition. 6. Device according to claim 5, characterized in that the deployment members (7) mentioned above are carried out for a movement cycle comprising: firstly simultaneously with the lateral advance movement of the aforementioned atmospheric conditioning tubing (8),   lateral advance movements between the lateral condition   ralemenit removed and laterally advanced condition; second, simultaneously with the axial feed movement of said tubing (8), axial feed movements between the axially withdrawn condition and the axially advanced condition; thirdly simultaneously with the lateral withdrawal movement of said tubing   (8), lateral withdrawal movements between the condition   laterally advanced and laterally   withdrawn; and fourthly, simultaneously with the movement   axial withdrawal of said tubing (8), axial shrinkage movements between the condition axially   advanced and axially retracted condition.   7. Device according to any one of the claims   tions, characterized in that the second posi-   The above-mentioned thrust member (1) is a position where said member has advanced beyond the holding means (4).   bag to remove a bag (3) from said holding member.   8. Device according to any one of the claims   prior art, characterized in that the aforementioned atmospheric conditioning tubing (8) is a   tubing for injecting a flushing gas.   9. Device according to any one of the claims   1 to 7, characterized in that the tubing of condi-   said atmospheric assembly (8) is a tubing under vacuum.   10. Device according to any one of the claims   8 or 9, characterized in that the aforementioned deployment members (7) are hollow and form themselves.   two atmospheric conditioning devices.   11. Device according to any one of the claims   characterized in that there are four deployment members (16a, 16b, 17a, 17b) which are arranged in a rectangular configuration and for a pairwise movement (16a, 17a, 16b, 17b) to and away from each other. each other, with further movable bag folding members (18a, 18b) in opposition to associated deployment members (16a, 17a; 16b; 17b), towards and away from each other the along the major axis of said rectangle (16a-16b-17b-17a) formed by said deployment bodies.