Abstract
A device for compressing packaging sleeves includes at least two movably supported pressure bars for compressing the packaging sleeve, and at least one drive for moving the pressure bars. The pressure bars are supported in such a way that between the pressure bars a gap is created, the longitudinal direction of which corresponds to a transport direction of the packaging sleeve. The pressure bars are supported in such a way that the distance between the pressure bars is variable. The pressure bars are supported in such a way that the pressure bars are movable in the longitudinal direction of the gap. Also described is a corresponding method for compressing packaging sleeves.
Claims
1.-28. (canceled)
29. A device for compressing packaging sleeves, comprising: at least two movably supported pressure bars for compressing the packaging sleeve, and at least one drive for moving the pressure bars, wherein the pressure bars are supported in such a way that between the pressure bars a gap is created, a longitudinal direction of which corresponds to a transport direction of the packaging sleeve, wherein the extension of the pressure bars in the longitudinal direction of the gap is greater than their extension in a transversal or vertical direction, wherein the pressure bars are supported in such a way that the distance between the pressure bars is variable, and wherein the pressure bars are supported in such a way that the pressure bars are movable in the longitudinal direction of the gap, wherein the pressure bars are supported in such a way that the pressure bars are movable along a non-circular closed curve.
30. The device according to claim 29, wherein the closed curve lies in a plane defined by the longitudinal direction of the gap and by the transversal direction of the gap running vertically thereto.
31. The device according to claim 29, wherein the pressure bars are supported on a common baseplate.
32. The device according to claim 29, wherein at least one of the pressure bars comprises a flexible bar.
33. The device according to claim 29, further comprising at least four rotatably supported shafts.
34. The device according to claim 33, wherein the rotatably supported shafts are supported in a common baseplate.
35. The device according to claim 33, wherein the rotatably supported shafts have axes of rotation arranged in parallel to one another.
36. The device according to claim 33, further comprising inserts for supporting the rotatably supported shafts in the baseplate.
37. The device according to claim 33, further comprising an eccentric element, connected to at least one of the rotatably supported shafts so that it cannot rotate.
38. The device according to claim 37, wherein the eccentric element has an eccentricity in the range between 0.5 mm and 5 mm.
39. The device according to claim 37, further comprising an adapter, supported rotatably on the eccentric element.
40. The device according to claim 37, wherein each pressure bar is secured on at least two eccentric elements and/or to at least two adapters.
41. The device according to claim 29, wherein the pressure bars are each supported on at least two rotatably supported cranks.
42. The device according to claim 41, wherein each crank has a rotary drive.
43. The device according to claim 41, wherein each of the cranks is rotatably connected with one of a plurality of push rod.
44. The device according to claim 43, wherein each of the push rods is guided in a linear guide in the transversal direction of the gap.
45. The device according to claim 41, wherein at least one of the cranks is rotatably connected with a secondary crank, the secondary crank is rotatably connected with a secondary push rod.
46. The device according to claim 45, wherein the secondary push rods are guided in a linear track in the longitudinal direction of the gap.
47. The device according to claim 43, wherein each push rod and secondary push rod has a drive.
48. The device according to claim 29, further comprising a transport belt with cells for receiving the packaging sleeves.
49. A method for compressing packaging sleeves comprising multiple layers of different material, the method comprising: a) providing a device for compressing packaging sleeves with at least two movably supported pressure bars for compressing the packaging sleeve and with at least one drive for moving the pressure bars; b) varying the distance between the pressure bars; and c) moving the pressure bars in a longitudinal direction of a gap between the pressure bars, wherein the steps b) and c) are performed by moving the pressure bars along a non-circular closed curve.
50. The method according to claim 49, wherein in step a) the device comprises a device according to claim 29.
51. The method according to claim 50, wherein the device has a transport belt with cells for receiving the packaging sleeves and wherein the transport belt with the cells is moved continuously.
52. The method according to claim 50, wherein the device has a transport belt with cells for receiving the packaging sleeves and wherein the transport belt with the cells is moved intermittently.
53. The method according to claim 49, wherein steps b) and c) are performed simultaneously.
54. The method according to claim 49, wherein the maximum path velocity of the pressure bars in a transport direction is 1% to 5% higher than a transport speed of the packaging sleeve.
Description
[0042] The invention is further explained in the following using a drawing showing just one preferred embodiment. The drawing shows as follows:
[0043] FIG. 1A a blank known from the prior art for folding a packaging sleeve;
[0044] FIG. 1B: a packaging sleeve known from the prior art formed from the blank shown in FIG. 1A, in the flat folded state;
[0045] FIG. 1C: the packaging sleeve from FIG. 1B in the unfolded state;
[0046] FIG. 1D: the packaging sleeve from FIG. 1C with pre-folded floor and gable surfaces;
[0047] FIG. 1E: the packaging sleeve from FIG. 1C following compression;
[0048] FIG. 2: a front view of first configuration of a device according to the invention for compressing packaging sleeves;
[0049] FIG. 3: a side view of the device for compressing packaging sleeves from FIG. 2;
[0050] FIG. 4: a top view of the device for compressing packaging sleeves from FIG. 2;
[0051] FIG. 5: a cross-sectional view along plane V-V from FIG. 2 of the device for compressing packaging sleeves from FIG. 2;
[0052] FIG. 6: a side view of a second configuration of a device according to the invention for compressing packaging sleeves;
[0053] FIG. 7: a top view along plane VII-VII from FIG. 6 of the device for compressing packaging sleeves from FIG. 6;
[0054] FIG. 8: a side view of a third configuration of a device according to the invention for compressing packaging sleeves; and
[0055] FIG. 9: a top view along the plane IX-IX from FIG. 8 of the device for compressing packaging sleeves from FIG. 8.
[0056] FIG. 1A shows a blank 1 known from the prior art, from which a packaging sleeve can be formed. Blank 1 can comprise multiple layers of different materials, such as paper, board, plastic or metal, in particular aluminium. Blank 1 has a number of fold lines 2, intended to facilitate the folding of blank 1 and divide the blank 1 into a number of surfaces. Blank 1 can be divided into a first side surface 3, a second side surface 4, a front surface 5, a rear surface 6, a sealing surface 7, floor surfaces 8 and gable surfaces 9. From blank 1 a packaging sleeve can be formed by blank 1 being folded in such a way that the sealing surface 7 can be bonded, in particular welded, with the front surface 5.
[0057] FIG. 1B shows a packaging sleeve 10 known from the prior art in the flat folded state. The areas of the packaging sleeve already described in relation to FIG. 1A are given corresponding references in FIG. 1B. The packaging sleeve 10 is formed from the blank 1 shown in FIG. 1A. For this, blank 1 has been folded in such a way that the sealing surface 7 and the front surface 5 are arranged in an overlapping manner so that the two surfaces can be extensively welded together. The result is a longitudinal weld seam 11. In FIG. 1B the packaging sleeve 10 is shown in a flat state, folded together. In this state one side surface 4 (concealed in FIG. 1B) is positioned below the front surface 5 while the other side surface 3 is lying on the rear surface 6 (concealed in FIG. 1B). In the folded, flat state a number of packaging sleeves 10 can be stacked in a particularly space-saving manner. Therefore, the packaging sleeves 10 are often stacked at the place of manufacture and transported in a stack to the place of filling. Only there are the packaging sleeves 10 de-stacked and unfolded in order to be able to be filled with contents, for example foodstuffs.
[0058] FIG. 1C shows the packaging sleeve 10 from FIG. 1B in the unfolded state. Here again, the areas of the packaging sleeve 10 already described in relation to FIG. 1A or FIG. 1B are given corresponding references. The unfolded state means a configuration in which between any two neighbouring surfaces 3, 4, 5 and 6 an angle of approximately 90 is formed, so that the packaging sleeve 10depending on the form of these surfaceshas a square or rectangular section. Accordingly, the opposing side surfaces 3, 4 are arranged in parallel. The same applies to the front surface 5 and the rear surface 6.
[0059] FIG. 1D shows the packaging sleeve 10 from FIG. 1C in the pre-folded state, thus in a state in which the fold lines 2 both in the area of the floor surfaces 8 and in the area of the gable surfaces 9 have been pre-folded. Those areas of the floor surfaces 8 and the gable surfaces 9, bordering the front surface 5 and the rear surface 6, are also referred to as rectangular surfaces 12. During pre-folding, the rectangular surfaces 12 are folded inwards and subsequently form the floor or the gable of the packaging. Those areas of the floor surfaces 8 and the gable surfaces 9, bordering the side surfaces 3, 4, are on the other hand referred to as triangular surfaces 13. During pre-folding, the triangular surfaces 13 are folded outwards and form protruding areas of excess material, also referred to as ears 14 which in a subsequent manufacturing stepfor example by a bonding processare attached to the packaging.
[0060] FIG. 1E shows the packaging sleeve 10 from FIG. 1D after compression, thus in the filled and closed state. In the area of the floor surfaces 8 and in the area of the gable surfaces 9 after closing, a fin seam 15 results. In FIG. 1E the ears 14 and the fin seam 15 protrude. Both the ears 14 and the fin seam 15 are attached in a subsequent manufacturing step, for example by a bonding process.
[0061] FIG. 2 shows a front view of a first configuration of the device 16 according to the invention for compressing packaging sleeves. A transport belt 17 is also shown with cells 18, in which the packaging sleeves 10 are initially conveyed to the device 16 and after compression transported away again. The transport direction T of the packaging sleeves 10 therefore runs parallel to the transport belt 17. The device 16 comprises a baseplate 19, in which four shafts 20 are rotatably supported, only the front two shafts 20A of which can be seen in FIG. 2, behind which the two other shafts 20B are arranged. The structure of the device 16 in relation to FIG. 2 is explained solely in respect of the front two shafts 20A; the two rear shafts 20B have a corresponding structure, however. Each of the shafts 20A has an axis of rotation 21A. The axes of rotation 21A of the two shafts 20A are arranged parallel to one another. Each of the shafts 20A is rotatably supported in an insert 22A, that is pushed into a hole in the baseplate 19 and preferably attached to the baseplate 19 by a press fit so that it cannot rotate. Between the shafts 20A and the inserts 22A rolling bearings 23 (not shown in in FIG. 2) are provided, allowing rotation of the shafts 20A relative to the inserts 22A and thus also to the baseplate 19. The shafts 20A are driven together with the shafts 20B via an electric motor 24, driving the top ends of the four shafts 20 via a toothed belt 25. In order to achieve a positive connection and thus synchronous operation, at the top ends of the shafts 20 teeth are provided to match the toothed belt 25. Each shaft 20A is connected at its bottom end via a press fit with an eccentric element 26A (not shown in FIG. 2), which is rotatably connected via rolling bearings 27 (not shown in FIG. 2) with an adapter 28A.
[0062] A common pressure bar 29A is secured in each case to two adapters 28A and the intention is for it to compress the packaging sleeve 10 in the area of the fin seams 15. To this end, between the two pressure bars 29A and 29B (concealed in FIG. 2) arranged opposite one another a gap S is provided, through which the upper areas of the packaging sleeves 10 are guided. The gap S has a longitudinal direction Xs, corresponding to the transport direction T of the packaging sleeve 10. The gap S also has a vertical direction Ys and a transversal direction Zs, running perpendicularly to one another and vertically to the longitudinal direction Xs of the gap S (see system of coordinates in FIG. 2). The pressure bars 29A, 29B are supported in such a way that the distance between the pressure bars 29A, 29B is variable; a variation in this distance can in particular be achieved by moving one or both pressure bars 29A, 29B in the transversal direction Zs of the gap S. The pressure bars 29A, 29B are also supported in such a way that the pressure bars 29A, 29B are movable in the longitudinal direction Xs of the gap S and therefore during the pressing process can be conveyed with the moving packaging sleeves 10 (shown by double arrows in FIG. 2).
[0063] FIG. 3 shows a side view of the device 16 for compressing packaging sleeves from FIG. 2. For those areas of the device 16 already described in relation to FIG. 2, corresponding references are used in FIG. 3. Apart from one of the two front shafts 20A, in the side view one of the two rear shafts 20B can now be identified. The device 16 has two pressure bars 29A, 29B, which can be moved via two adapters 28A, 28B, respectively, and in so doing compress the packaging sleeve 10 in the area of its fin seams 15. To this end the distance between the two adapters 28A, 28B and the pressure bars 29A, 29B secured to it is varied (shown by double arrows in FIG. 3). In order to achieve the required movement, both front shafts 20A must rotate in the opposite direction to the two rear shafts 20B (shown by arrows in FIG. 3). Nevertheless, all four shafts 20 can be driven via the same toothed belt 25, wherein the necessary reversal of direction of rotation can be achieved for example by deflection rollers (not shown in FIG. 3), around which the toothed belt is 25 guided. At the ends directed towards the gap S of the pressure bars 29A, 29B, rubber strips 30A, 30B are provided, intended to compensate for irregularities in the packaging sleeve 10.
[0064] FIG. 4 shows a top view of the device 16 for compressing packaging sleeves from FIG. 2. For those areas of the device 16, already described in relation to FIG. 2 or FIG. 3, corresponding references are used in FIG. 4. In the top view, in particular the way in which the drive comprising the electric motor 24 and the toothed belt 25 operates can be identified. The electric motor 24 is arranged centrally on the baseplate 19 and drives the toothed belt 25 via a toothed wheel (direction of movement shown by arrows). The toothed belt 25 embraces all four shafts 20, and thus both the two front shafts 20A and the two rear shafts 20B. Alternatively to the solution shown and in this respect preferred, it can be provided that the toothed belt 25 embraces and drives just one of the front shafts 20A and one of the rear shafts 20B with the other shafts 20 being passively conveyedfor example by means of the pressure bars 29A, 29B. The way in which the device 16 works, however, requires the direction of rotation of the two front shafts 20A to be different from the direction of rotation of the two rear shafts 20B. The reversal of direction of rotation can be achieved for example by suitably arranged deflection rollers, whichexactly like the shafts 20are rotatably supported on the baseplate 19 and similarly embraced by the toothed belt 25. The deflection rollers 31 are preferably supported so that they can be adjusted or swivelled in order for the tension of the toothed belt to also be set via the deflection rollers 31.
[0065] FIG. 4 is intended to show, by way of example, the way in which the drive works: in the path of the toothed belt 25 shown, rotation of the toothed wheel of the electric motor 24 anticlockwise (all directions of rotation are shown by arrows in FIG. 4) leads to both front shafts 20A rotating anticlockwise about their axes of rotation. This movement is transmitted via the two front adapters 28A to the front press plate 29A, which thus performs a clockwise circular movement. The two rear shafts 20B, however, rotate anticlockwise about their axes of rotation. This movement is transmitted via the two rear adapters 28B to the rear press plate 29B, which thus performs a clockwise circular movement. Through the opposing circular movements of the two press plates 29A, 29B, both a pressing movement (movement component in the transversal direction Zs) and a conveying movement (movement component in the longitudinal direction Xs) are achieved and combined.
[0066] FIG. 5 shows a cross-sectional view along the plane V-V from FIG. 2 of the device 16 for compressing packaging sleeves from FIG. 2. In FIG. 5 also, for those areas of the device 16 already described in relation to FIG. 2 to FIG. 4 corresponding references are used. From the cross-sectional view it can be clearly identified that the insert 22B is a cylindrical component with a hollow interior, which is pushed into a hole provided in the baseplate 19 and preferably connected with the baseplate 19 by a press fit so that it cannot rotate. In the insert 22B the shaft 20B is rotatably supported by two rolling bearings 23. The shaft 20B thus pierces the baseplate 19. In its bottom area the shaft 20B is connected with the eccentric element 26B so that it cannot rotate. The eccentric element 26B has a central axis 32B, running parallel to the axis of rotation 21B and which due to the eccentricity of the eccentric element 26B in each turning position is alongside the axis of rotation 21B. Between the central axis 32B of the eccentric element 26B and the axis of rotation 21B of the shaft 20B an offset 33 develops, also referred to as eccentricity. The double offset 33 corresponds to the travel of the adapter 28B and the press plate 29B secured to this in the transversal direction Zs (shown as a double arrow in FIG. 5) and in the longitudinal direction Xs (not shown in FIG. 5). The amount of eccentricity 33 remains constant during operation, but the direction changes, since the central axis 32B of the eccentric element 26B rotates about the stationary axis of rotation 21B of the shaft 20B. In order to compensate for the imbalance caused by the eccentric element 26B, the shaft 20B can be provided with a counterweight (not shown in FIG. 5). FIG. 5 illustrates the structure of the device 16 and the way it works with, for the sake of clarity, only one of the two rear shafts 20B; for the other rear shaft 20B and for the two front shafts 20A, however, the same applies by analogy. In order to reliably prevent contamination of the packaging sleeve 10 and/or its contents, in the area surrounding the eccentric element 26B the device 16 can for example be sealed by bellows 42 that surround the shaft. The bellows 42 can for example be arranged between the insert 22B and the adapter 28B and thus reliably protect the rolling bearings 23, 27which may contain lubricant.
[0067] FIG. 6 shows a side view of a second configuration of a device 16 according to the invention for compressing packaging sleeves. For those areas of the device 16 already described in connection with the first configuration (FIG. 2 to FIG. 5), corresponding references are used in FIG. 6. The second configuration of the device 16 differs from the configuration of the device 16 in particular by a different support and a different drive for the pressure bars 29A, 29B. Each of the two pressure bars 29A, 29B is rotatably supported on two cranks 34A, 34A, and 34B, 34B, respectively, of which in FIG. 6 only the two front cranks 34A, 34B can be identified. Axes of rotation 35A, 35A, 35B, 35B run through the connecting plane between the pressure bars 29A, 29B and the cranks 34A, 34A, 34B, 34B. Each crank 34A, 34A; 34B, 34B is for its part rotatably supported on a push rod 36A, 36A, 36B, 36B, of which similarly in FIG. 6 only the two front push rods 36A, 36B can be identified. Axes of rotation 37A, 37A, 37B, 37B similarly run through the connecting plane between the cranks 34A, 34A, 34B, 34B and the push rods 36A, 36A, 36B, 36B. In addition, between each crank 34A, 34A, 34B, 34B and the associated push rod 36A, 36A, 36B, 36B a rotary drive 38A, 38A, 38B, 38B is arranged, able to bring about a rotational movement of the cranks 34A, 34A, 34B, 34B. The push rods 36A, 36A, 36B, 36B, on the other hand, are pushed back and forth by drives 39A, 39A, 39B, 39B, arranged in a housing 40A, 40B (movements of the push rods 36A, 36A, 36B, 36B are indicated in FIG. 6 by double arrows). Here a linear movement of the push rods 36A, 36A, 36B, 36B is ensured by linear guides 41A, 41A, 41B, 41B, which are similarly arranged in the housings 40A, 40B. The two housings 40A, 40B can be supported on the baseplate 19 or in another mannerfor example separately.
[0068] FIG. 7 shows a top view along the plane VII-VII from FIG. 6 of the device 16 for compressing packaging sleeves from FIG. 6. For those areas of the device 16 already described in relation to the first configuration (FIG. 2 to FIG. 5) or to FIG. 6, corresponding references are used in FIG. 7. The baseplate 19 cannot be identified through the sectional plane in FIG. 7 and attention is turned towards the support and the drive of the pressure bars 29A, 29B. From the top view it is clearly identifiable that the push rods 36A, 36A, 36B, 36B run in the transversal direction Zs of the gap S. Since the linear guides 41A, 41A, 41B, 41B similarly run in the transversal direction Zs of the gap S, the push rods 36A, 36A, 36B, 36B guided in these can likewise only be moved back and forth in the transversal direction Zs of the gap S (movements of the push rods 36A, 36A, 36B, 36B indicated in FIG. 7 by double arrows). The cranks 34A, 34A, 34B, 34B, on the other hand, are rotatably connected with the push rods 36A, 36A, 36B, 36B and can therefore be rotated about the axes of rotation 37A, 37A, 37B, 37B (movements of the cranks 34A, 34A, 34B, 34B likewise indicated in FIG. 7 by double arrows). Whereas the push rods 36A, 36A, 36B, 36B are thus supported in such a way that they can perform a translational movement, the cranks 34A, 34A, 34B, 34B are supported in such a way that they can perform a rotational movement. The resulting movement of the pressure bars 29A, 29B supported on the cranks 34A, 34A, 34B, 34B is therefore a movement which results from the superimposition of a translational movement and a rotational movement.
[0069] FIG. 8 shows a side view of a third configuration of a device 16 according to the invention for compressing packaging sleeves. For those areas of the device 16 already described in relation to the first configuration (FIG. 2 to FIG. 5) or the second configuration (FIG. 6, 7), corresponding references are used in FIG. 8. The third configuration of device 16 can also be distinguished from the first two configurations in particular by a different support and a different drive of the pressure bars 29A, 29B.
[0070] Each of the two pressure bars 29A, 29B can in turn be rotated on two cranks 34A, 34A, 34B, 34B, of which in FIG. 8 just the front two cranks 34A, 34B can be identified. Axes of rotation 35A, 35A, 35B, 35B run through the connecting plane between the pressure bars 29A, 29B and the cranks 34A, 34A, 34B, 34B. Each crank 34A, 34A, 34B, 34B is rotatably supported on a push rod 36A, 36A, 36B, 36B, of which in FIG. 8 again only the front two push rods 36A, 36B can be identified. Axes of rotation 37A, 37A, 37B, 37B similarly run through the connecting plane between the cranks 34A, 34A, 34B, 34B and the push rods 36A, 36A, 36B, 36B. Unlike the second configuration, however, no rotary drives are arranged between the cranks 34A, 34A, 34B, 34B and the push rods 36A, 36A, 36B, 36B connected to them. In the third configuration, the rotational movement of the cranks 34A, 34A, 34B, 34B is brought about in another wayas described below. The push rods 36A, 36A, 36B, 36B are in turn moved back and forth by drives 39A, 39A, 39B, 39B, arranged in a housing 40A, 40B (movements of the push rods 36A, 36A, 36B, 36B shown in FIG. 8 by double arrows). A linear movement of the push rods 36A, 36A, 36B, 36B is ensured here by linear guides 41A, 41A, 41B, 41B, also arranged in the housings 40A, 40B. Both housings 40A, 40B can be supported on the baseplate 19 or in another wayseparately, for example.
[0071] Finally, FIG. 9 shows a top view of the device 16 for compressing packaging sleeves from FIG. 8 along the plane IX-IX from FIG. 8. For those areas of the device 16, already described in relation to the first configuration (FIG. 2 to FIG. 5), the second configuration (FIG. 6, 7) or FIG. 8, corresponding references are also used in FIG. 9. Due to the path of sectional plane IX-IX the baseplate 19 cannot be identified in FIG. 9 and attention is turned towards the support and the drive of the pressure bars 29A, 29B. In the top view it can clearly be identified that apart from the four push rods 36A, 36A, 36B, 36B and four cranks 34A, 34A, 34B, 34B already known from the second configuration, a further two push rods 36A, 36B are provided, on each of which a further crank 34A, 34B is rotatably supported. Axes of rotation 37A, 37B run through the connecting plane between the cranks 34A, 34B and the push rods 36A, 36B. The two additional cranks 34A, 34B are not rotatably connected with the pressure bars 29A, 29B, however, but with two other cranks 34A, 34B. Axes of rotation 37A, 37B run through the connecting points between cranks 34A, 34B and cranks 34A, 34B.
[0072] The two additional push rods 36A, 36B differ from the four other push rods 36A, 36A, 36B, 36B by their alignment: whereas the four push rods 36A, 36A, 36B, 36B run in the transversal direction Zs of the gap S, the two push rods 36A, 36B run in the longitudinal direction Xs of the gap S, thus in the transport direction T. The four linear guides 41A, 41A, 41B, 41B similarly run in the transversal direction Zs of the gap S; the two linear guides 41A, 41B, on the other hand, run in the longitudinal direction Xs of the gap S, thus in transport direction T. The result of this is that the push rods 36A, 36A, 36B, 36B guided in the linear guides 41A, 41A, 41B, 41B are moved back and forth only in the transversal direction Zs of the gap S, whereas the push rods 36A, 36B guided in the linear guides 41A, 41B are moved back and forth only in the longitudinal direction Xs of the gap S, thus in the transport direction T (movements of the push rods 36A, 36A, 36A, 36B, 36B, 36B in FIG. 9 indicated by double arrows). All push rods 36A, 36A, 36A, 36B, 36B, 36B are moved back and forth by drives 39A, 39A, 39A, 39B, 39B, 39B, arranged in the housings 40A, 40B.
[0073] All cranks 34A, 34A, 34A, 34B, 34B, 34B are rotatably connected with the push rods 36A, 36A, 36A, 36B, 36B, 36B and can therefore be rotated about the axes of rotation 37A, 37A, 37A, 37B, 37B, 37B (movements of the cranks 34A, 34A, 34A, 34B, 34B, 34B also indicated by double arrows in FIG. 9). Whereas push rods 36A, 36A, 36A, 36B, 36B, 36B are thus supported in such a way that they can perform a translational movement, cranks 34A, 34A, 34A, 34B, 34B, 34B are supported in such a way that they can perform a rotational movement. With the third configuration of the device 16, the resulting movement of the pressure bars 29A, 29B supported on the cranks 34A, 34A, 34B, 34B is therefore also a movement resulting from the superimposition of a translational movement and a rotational movement.
LIST OF REFERENCE SYMBOLS
[0074] 1: Blank [0075] 2: Fold line [0076] 3, 4: Side surface [0077] 5: Front surface [0078] 6: Rear surface [0079] 7: Sealing surface [0080] 8: Floor surface [0081] 9: Gabel surface [0082] 10: Packaging sleeve [0083] 11: Longitudinal weld seam [0084] 12: Rectangular surface [0085] 13: Triangular surface [0086] 14: Ear [0087] 15: Fin seam [0088] 16,16, 16: Device for compressing packaging sleeves [0089] 17: Transport belt [0090] 18: Cell [0091] 19: Baseplate [0092] 20, 20A, 20B: Shaft [0093] 21A, 21B: Axis of rotation (of shaft 20A, 20B) [0094] 22A, 22B: Insert [0095] 23: Rolling bearing [0096] 24: Electric motor [0097] 25: Toothed belt [0098] 26A, 26B: Eccentric element [0099] 27: Rolling bearing [0100] 28A, 28B: Adapter [0101] 29A, 29B: Pressure bar [0102] 30A, 30B: Rubber strip [0103] 31: Deflection roller [0104] 32A, 32B: Central axis (of the eccentric element 26A, 26B) [0105] 33: Eccentricity [0106] 34A, 34A, 34A, 34B, 34B, 34B: Crank [0107] 35A, 35A, 35A, 35B, 35B, 35B: Axis of rotation (crank/pressure bar) [0108] 36A, 36A, 36A, 36B, 36B, 36B: Push rod [0109] 37A, 37A; 37A, 37B, 37B, 37B: Axis of rotation (push rod/crank) [0110] 38A, 38A, 38B, 38B: Rotary drive [0111] 39A; 39A; 39A, 39B, 39B, 39B: Drive [0112] 40A, 40B: Housing [0113] 41A, 41A, 41A, 41B, 41B, 41B: Linear guide [0114] 42: Bellows [0115] S: Gap [0116] Xs: Longitudinal direction (of the gap S) [0117] Ys: Vertical direction (of the gap S) [0118] Zs: Transversal direction (of the gap S) [0119] T: Transport direction of the packaging sleeve
