Packaging machine with support element for packaging trays

Abstract

A packaging machine (1) comprises a sealing tool (5) with a lower tool part (21) and an upper tool part (23) arranged above the lower tool part (21), a provision device (3), and a gripper device (15). The lower tool part (21) comprises a sealing body (27) which has a base surface (31) directed towards the upper tool part (23) and sealing edges (33) protruding from the base surface (31) towards the upper tool part (23). The sealing edges (33) are arranged one behind the other along a transport direction (9) and each border a receiving position (35) for a packaging tray (13). At least the sealing body (27) and the upper tool part (23) are movable relative to one another between a closed position of the sealing tool (5) and an open position of the sealing tool (5).The gripper device (15) is configured to pick up packaging trays (13) positioned one behind the other on the provision device (3) along the transport direction (9) and, in the open position of the sealing tool (5), to move them into the pick-up positions by moving them along the transport direction (9). The lower tool part (21) comprises at least one support element (37) with at least one support surface (39), which, in the open position of the sealing tool (5), is located between sealing edges (33) arranged one after the other along the transport direction (9) and is directed there above the base surface (31) in the direction of the upper tool part (23).

Description

[0001] The invention relates to the field of packaging machines. In particular, the invention relates to packaging machines with a gripper device that moves packaging trays into the sealing tool of the packaging machine when the sealing tool is in an open position.

[0002] DE 10 2019 206 392 A1 discloses a tray sealing machine comprising a feed belt, a sealing station, and a gripper device. Filled, but at this point still unsealed, trays are conveyed to the sealing station via the feed belt. The gripper device transfers the trays in a production direction to the sealing station, where they are sealed by a sealing tool of the sealing station with a cover film fed from above. The sealing tool comprises an upper tool and a lower tool, which are moved toward each other in a closing direction. The lower tool comprises a main body mounted on a lifting mechanism. A tray carrier is arranged on the main body.

[0003] A problem with conventional packaging machines can be that packaging trays tip over due to the gripper device when being moved into the closing station. This unwanted tipping of the packaging trays can cause them to jam, thus impeding proper operation. Furthermore, if the still unsealed packaging trays tip over, product can flow out of the packaging trays and contaminate the packaging machine.

[0004] It is an object of the invention to provide an improved way of bringing packaging trays to be closed into receiving positions in a sealing tool.

[0005] According to one aspect of the invention, a packaging machine is provided. The packaging machine comprises a sealing tool, a provision device, and a gripper device. The sealing tool comprises a lower tool part and an upper tool part. The upper tool part is arranged above the lower tool part. The lower tool part comprises a sealing body. The sealing body has a base surface. The base surface is directed towards the upper tool part. The sealing body also has sealing edges. The sealing edges protrude from the base surface towards the upper tool part. The sealing edges are arranged one behind the other along a transport direction. The sealing edges each border a receiving position for a packaging tray. At least the sealing body and the upper tool part are movable relative to one another between a closed position of the sealing tool and an open position of the sealing tool.The gripper device is configured to pick up packaging trays positioned one behind the other on the supply device along the transport direction and, in the open position of the sealing tool, to move them into the pick-up positions by moving them along the transport direction. The lower tool part comprises at least one support element with at least one support surface. In the open position of the sealing tool, the at least one support surface is located between sealing edges arranged one after the other along the transport direction and is directed above the base surface toward the upper tool part.

[0006] The at least one support surface can provide a support surface for packages moved by the gripper device along the transport direction. The at least one support element can counteract the tipping of a packaging tray transported by the gripper device into a gap between the sealing edges that follow one another along the transport direction. The at least one support element can counteract the tendency of packages transported by the gripper device to get stuck on the sealing edges. The at least one support element can promote the packaging trays being transported upright by the gripper device. In the open position of the sealing tool, the at least one support element can at least partially fill an area between the sealing edges that follow one another along the transport direction.By preventing or reducing tipping of the packaging trays during transport by the gripper device, reliable operation of the packaging machine can be achieved and / or interruptions in the operation of the packaging machine can be reduced.

[0007] The packaging trays can each have a base and a circumferential side wall. The circumferential side wall can enclose an interior of the packaging tray for receiving a product to be packaged. The packaging trays can each have an access opening. The access opening can be opposite the base. The packaging trays can each have a sealing flange. The sealing flange can be formed circumferentially around the access opening. The sealing flange can extend radially outward from the side wall.

[0008] The gripper device can be configured such that packaging trays transported by the gripper device along the transport direction, in particular their bases, each stand at least temporarily both on at least one of the sealing edges and simultaneously on the at least one support surface.

[0009] The gripper device can be configured to transport the packaging trays in an unlocked state from the supply device to the receiving positions. When the packaging trays are transported by the gripper device, the access opening of the packaging trays can be directed upwards.

[0010] The sealing tool can be configured to seal a cover material to the packaging trays in the closed position of the sealing tool, thereby closing the packaging trays. In particular, the sealing tool can be configured to seal the cover material circumferentially to the sealing flange in the closed position of the sealing tool. Sealing can be achieved by applying heat and / or pressure.

[0011] The upper part of the tool can comprise at least one sealing die. The sealing die can be lowerable when the sealing tool is in the closed position. The sealing die can interact with one of the sealing edges located beneath the sealing die to seal the cover material to the sealing flange between the sealing edge and the sealing die. The sealing edge can be designed as a counterpressure element for the sealing die.

[0012] The packaging tray may comprise or be made of a plastic material.

[0013] The cover material can be designed as a cover material web. The cover material can comprise a plastic material or consist of a plastic material.

[0014] The gripper device can comprise a gripper arm and a tray gripper attached to the gripper arm. The tray gripper can extend at least substantially along the transport direction. The tray gripper can have receiving recesses for the packaging trays, one behind the other, along the transport direction. The tray gripper can be configured to come into contact with the side walls of the packaging trays in the region of the receiving recesses. The tray gripper can be configured to move laterally transversely to the transport direction toward the packaging trays positioned one behind the other on the provision device and to pick up the packaging trays, in particular by pivoting the gripper arm about an axis parallel to the transport direction.The tray gripper can then be moved along the transport direction with the picked-up packaging trays to move the packaging trays along the transport direction into the receiving positions in the sealing tool. To move the tray gripper along the transport direction, the gripper arm can be attached to a carriage that moves parallel to the transport direction.

[0015] Between each sealing edge following one another along the transport direction, there may be a support surface of the at least one support surface, which is directed above the base surface in the direction of the upper part of the tool.

[0016] Different support surfaces of the at least one support surface can each be part of a separate support element. In the open position of the sealing tool, the separate support elements can each be present at least partially between successive sealing edges along the transport direction.

[0017] Several support surfaces or all support surfaces of the at least one support surface can be part of a coherent support element. For example, the support element can be designed as a plate-shaped body that is cut out at least in the region of the sealing edges and comprises support surfaces that, in the open position of the sealing tool, are located between successive sealing edges along the transport direction and are directed above the base surface toward the upper part of the tool.

[0018] The sealing edges can protrude from the base surface by a first length in the direction of the upper tool part. The at least one support surface can lie above the base surface by a second length, at least in the open position of the sealing tool. The second length can be equal to or less than the first length. For example, the second length can be at least 50 percent, or at least 70 percent, or at least 80 percent, or at least 90 percent of the first length. The first length and the second length can be at least substantially equal. The second length can, for example, be in the range between 95% and 105% of the first length, or in the range between 98% and 102% of the second length. In the open position of the sealing tool, the sealing edges and the at least one support surface can together define a transport plane as a support plane for the packaging trays.

[0019] In the open position of the sealing tool, the at least one support surface can form a support surface or a support for the packaging trays in a valley between two sealing edges arranged one behind the other along the transport direction. The at least one support surface can at least prevent packaging trays moved by the gripper device along the transport direction from tipping so deeply into a valley between sealing edges arranged one behind the other along the transport direction that the operation of the packaging machine would be impeded.

[0020] The gripper device can be configured to push the packaging trays over the sealing edges and the at least one support surface for movement along the transport direction.

[0021] The gripper device can be configured to grip the packaging trays from the side while still allowing the packaging trays to slide downwards. As the packaging trays are transported by the gripper device along the transport direction, the packaging trays can be in contact with the sealing edges and / or the at least one support surface.

[0022] The at least one support element can be arranged to be movable relative to the base surface. The at least one support element can be arranged to be movable relative to the base surface in the direction away from the tool upper part or toward the tool upper part. The at least one support element can be arranged to be movable relative to the base surface along a vertical direction.

[0023] The at least one support element can be arranged so as to be movable with respect to the base surface between a support position and a stowed position. The at least one support element can be configured to be in the support position when the sealing tool is in the open position. In the support position, the at least one support surface of the at least one support element can be arranged above the base surface, in particular by the second length above the base surface. The at least one support element can be configured to be in the stowed position when the sealing tool is in the closed position. In the stowed position, the at least one support surface can be closer to the base surface than in the support position. In the stowed position, the at least one support surface can be less far above the base surface than in the support position or not above the base surface at all.In the stowed position, the at least one support surface can be flush with the base surface. In the stowed position, the at least one support element can be recessed into the sealing body or located below the sealing body. In the support position, the at least one support element can support the smooth movement of the packaging trays into the receiving positions. In the stowed position, the support element can be retracted relative to the sealing body in order to impede the sealing process as little as possible, or not at all.

[0024] The at least one support element can be resiliently mounted on the sealing body. The lower tool part can comprise a spring device that preloads the at least one support element relative to the sealing body into the support position. The spring element can preload the at least one support element upwards toward the upper tool part. The at least one support element can be preloaded toward the upper tool part.

[0025] The at least one support element can be configured to be pushed relatively into the sealing body upon movement of the sealing tool into the closed position by contact with the tool upper part. Upon movement of the sealing tool into the closed position, the at least one support element can be pushed downward relative to the sealing body against an upward bias.

[0026] The at least one support element can be provided without prestressing. The at least one support element can be configured, with or without prestressing, to be in the support position in the open position of the sealing tool and in the stowed position in the closed position of the sealing tool.

[0027] The sealing body can be configured to be lifted toward the upper part of the tool to move the sealing tool into the closed position. The packaging machine can include a lifting mechanism configured to lift the sealing body toward the upper part of the tool to move the sealing tool into the closed position.

[0028] The at least one support element can be configured so that it is not lifted when the sealing body is lifted, or so that it is lifted only to a lesser extent than the sealing body. As a result, the at least one support element can be lowered relative to the sealing body when the sealing body is lifted. For example, the at least one support element can be provided in a stationary manner.

[0029] The sealing body can be configured to lift packaging trays located in the receiving positions upwards when the sealing body is lifted, in particular when the sealing tool is lifted by the lifting mechanism. The sealing body can be configured to lift the packaging trays upwards through contact between the sealing edges and the sealing flanges of the packages. The sealing flanges of the packages can rest on the sealing edges when the sealing body is raised.

[0030] Preferably, the at least one support element does not protrude in the direction of the upper part of the sealing tool relative to the base surface in the closed position of the sealing tool. The at least one support element can be recessed into the sealing body in the closed position of the sealing tool. The at least one support element can be located at least partially below the base surface in the closed position of the sealing tool. The at least one support surface can be located below the base surface in the closed position of the sealing tool.

[0031] The at least one support surface can be flush with the base surface in the closed position of the sealing tool. If the at least one support element does not protrude upwards beyond the base surface in the closed position of the sealing tool, the interaction of the sealing body with the upper part of the tool can be simplified.

[0032] The upper tool can have sealing contours. The sealing contours can be configured to be in sealing contact with the base surface around each sealing edge in the closed position of the sealing tool. If the at least one support element does not protrude upwards above the base surface in the closed position of the sealing tool or is located completely below or at the same level as the base surface, a sealing engagement between the sealing contours of the upper tool and the base surface can be simplified. In particular, the at least one support surface can release a space for the sealing contours between sealing contours adjacent along the transport direction in the closed position of the sealing tool.

[0033] In the closed position of the sealing tool, the sealing contours can be laterally offset from the support element. In the closed position of the sealing tool, the sealing contours can extend at least partially over the at least one support element.

[0034] The packaging machine can comprise a removal device downstream of the sealing tool along the transport direction. The gripper device can be configured to transport packaging trays, after they have been closed in the sealing tool, from the sealing tool along the transport direction to the removal device. Here, too, the at least one support surface can counteract tipping of the packaging trays.

[0035] In the following, the invention is further explained using exemplary embodiments with reference to the figures. Figure 1shows a schematic perspective view of a packaging machine according to an embodiment. Figure 2 shows a schematic perspective view of the sealing tool and the gripper device of the packaging machine in the open position of the sealing tool. Figure 3 shows a schematic perspective view of the sealing tool in the open position of the sealing tool, wherein a packaging tray is shown in a receiving position. Figure 4 shows a schematic view of an upper part of the sealing tool from below in the open position of the sealing tool. Figure 5 shows a sectional view of the sealing tool in the open position, with the cutting plane parallel to the transport direction. Figure 6 shows a schematic perspective view of the sealing tool in the closed position of the sealing tool. Figure 7shows a schematic view of the upper part of the tool from below in the closed position of the sealing tool. Figure 8 shows a sectional view of the sealing tool in the closed position, with the cutting plane parallel to the transport direction. Figure 9 shows a perspective view of a support element according to an alternative embodiment.

[0036] Figure 1 shows a packaging machine 1 with a supply device 3 designed as a feed belt, a sealing tool 5, and a discharge device 7 designed as a conveyor belt. The feed device 3, the sealing tool 5, and the discharge device 7 are arranged one behind the other along a transport direction 9 on a machine frame 11. Packaging trays 13 to be closed are arranged one behind the other along the transport direction 9 on the feed device 3.

[0037] How better in Figure 2As can be seen, the packaging machine 1 comprises a gripper device 15 which is configured to grip the packaging trays 13 on the provision device 3 from the side and to push them along the transport direction 9 into the sealing tool 5.

[0038] The sealing tool 5 is configured to close the packaging trays 13 by sealing a cover material 14. As shown in Figure 1 As shown, the cover material 14 can be provided as a material web from a supply roll 16.

[0039] In the Figures 2 to 8In the embodiment shown, two lines of packaging trays 13 arranged next to one another can be processed simultaneously. For this purpose, the gripper device 15 comprises, on both lateral sides with respect to the transport direction 9, a gripper arrangement each having a gripper arm 17 and a tray gripper 19 attached to the gripper arm 17. The gripper arms 17 are arranged such that they can be displaced along the transport direction 9 and can each be rotated about a pivot axis extending parallel to the transport direction 9. By pivoting the gripper arms 17 such that the tray grippers 19 are moved inwards towards the packaging trays 13, packaging trays 19 standing on the provision device 3 are gripped. By a translational movement of the tray gripper 15 along the transport direction 9, the packaging trays 13 are transported along the transport direction 9 into the sealing tool 5.At the same time, in a final working cycle, sealed packaging trays 13 in the sealing tool 5 are transported from a downstream area of the tray gripper 15 along the transport direction 9 out of the sealing tool 5 onto the discharge device 7.

[0040] The sealing tool 5 comprises a lower tool part 21 and an upper tool part 23 arranged above the lower tool part 21. The lower tool part 21 comprises a main body 25 and a sealing body 27 carried by the main body 25. The packaging machine 1 comprises a lifting mechanism 29 which is configured to lift at least the main body 25 and the sealing body 27 of the lower tool part 21 upwards in the direction of the upper tool part 23.

[0041] In the Figures 2 to 5 The sealing tool 5 is shown in an open position. Figures 6 , 7 and 8show a closed position of the sealing tool 5, which is achieved from the open position by lifting at least the main body 25 and the sealing body 27 of the lower tool part 21 by the lifting mechanism 29.

[0042] How best in Figure 3 As shown, the sealing body 27 has a base surface 31 pointing upwards in the direction of the upper tool part 23. Sealing edges 33 protrude from the base surface 31 upwards in the direction of the upper tool part 23. The sealing edges 33 are arranged one behind the other along the transport direction 9. The sealing edges 33 each enclose a receiving position 35 for the packaging trays 13. In the open position of the sealing tool 5, the gripper device 15 simultaneously transports several packaging trays 13 into the sealing tool 5, so that all consecutive receiving positions 35 are each occupied by one packaging tray 13. In Figure 3For the sake of clarity, only one packaging tray 13 is shown on the input-side receiving position 35.

[0043] Preferably, the packaging trays 13 are not fixed in the tray grippers 19 with respect to a vertical direction of movement. During transport by the gripper device 15, the packaging trays 13 rest with their bases on the provision device 3 or the sealing edges 33 and are pushed over them.

[0044] The lower tool part 21 comprises support elements 37, which, in the open position of the sealing tool 5, are each present between successive sealing edges 33 along the transport direction 9. The support elements 37 each comprise an upwardly directed support surface 39, which, in the open position of the sealing tool 5, is directed above the base surface 31 in the direction of the upper tool part 23 between the successive sealing edges 33 along the transport direction 9. In the open position of the sealing tool 5, the support surfaces 39 bridge valleys between successive sealing edges 33. Packaging trays 13, which are pushed into the sealing tool 5 by the gripper device 15 along the transport direction 9, rest partially on the support surfaces 39.The support surfaces 39 preferably prevent packaging trays 13 transported by the gripper device 15 from tipping, with their edge facing forward with respect to the transport direction 9, into the valleys between successive sealing edges 33. Tipping of the packaging trays 13 could lead to a tilting of the packaging trays 13 and / or leakage of product held in the packaging trays 13, which could lead to an interruption of the production process in the packaging machine 1.

[0045] As in Figure 3As shown, the upper tool part 23 comprises a stationary hood 43 and a clamping frame 45 attached to the bottom of the hood 43. The cover material 14 is guided as a material web between the clamping frame 45 and the hood 43. The clamping frame 45 is movable along a vertical direction 47 between a release position and a clamping position. In the release position, the clamping frame 45 is spaced downwards from the hood 43 so that the cover material 14 can be advanced. In the clamping position, the clamping frame 45 is displaced upwards towards the hood 43 compared to the release position so that the cover material 14 is clamped between the hood 43 and the clamping frame 45. As shown in the Figures 2 to 5 As shown, the clamping frame 45 is in the open position of the sealing tool 5 in the release position. As shown in the Figures 6 to 8 As shown, the clamping frame 45 is in the closed position of the sealing tool 5 in the clamping position.

[0046] For the sealing process, the main body 25 and the sealing body 27 of the lower tool part 21 are lifted by the lifting mechanism 29 from the open position along the vertical direction 47 towards the upper tool part 23. In the process, the sealing edges 33 also move upwards and engage from below in a circumferential sealing flange 49 of the packaging trays 13, whereby the packaging trays 13 are carried upwards. During the upward movement, the sealing body 27 first comes into contact with the clamping frame 45 and pushes it upwards into the clamping position, so that the cover material 14 is clamped between the clamping frame 45 and the hood 43. The resulting operating position of the upper tool part 23 is in Figure 7 shown.

[0047] The support elements 37 are arranged to be movable with respect to the base surface 31 between a support position and a stowed position. In the open position of the sealing tool 5, the support elements 37 are in the support position (see Figures 2 , 3 and 5 ). In the support position, the support surfaces 39 of the support elements 37 are located above the base surface 31 in order to support the packaging trays 13 between the sealing edges 33 during transport by the gripper device 15. In the closed position of the sealing tool 5, the support elements 37 are in the stowed position. In the stowed position, the support elements 37 are sunk into the sealing body 27, so that the support surfaces 39 are at least substantially at the same height as the base surface 31 (see Figure 8 ).

[0048] In the illustrated embodiment, the support elements 37 are spring-mounted on the sealing body 27. Spring elements 51 urge the support elements 37 upward into the support position. When the main body 25 and the sealing body 27 of the lower tool part 21 are lifted by the lifting mechanism 29 from the open position along the vertical direction 47 toward the upper tool part 23, the support elements 37 are pressed downward relative to the sealing body 27 by contact with the clamping frame 45, counter to the preload by the spring elements 51, and thus moved into the stowed position.

[0049] For example, in the Figures 4 and 7As can be seen, a downward-facing surface of the clamping frame 45 defines sealing contours 53. The sealing contours 53 are designed to be in sealing contact with the base surface 27 around the individual sealing edges 33 when the sealing tool 5 is in the closed position. This sealing contact can simplify the creation of a vacuum in the region of the packaging trays 13 to support the sealing process. Achieving the sealing contact is simplified by the fact that the support elements 37 are in the stowed position when the sealing tool 5 is in the closed position and do not protrude beyond the base surface 31.

[0050] In the Figures 5 and 8Sealing stamps 55 of the upper tool part 23 are shown. In the closed position of the sealing tool 5, the sealing stamps 55 are lowered downward relative to the hood 43 in order to press the sealing flanges 49 and the cover material 14 from above onto the sealing edges 33, thus connecting them to one another.

[0051] Instead of the multiple support elements 37, which are each present between successive sealing edges 33 along the transport direction 9, a single, continuous support element 37 could be used. Figure 9 shows an embodiment of such a single support element 37. The support element 37 from Figure 9has a plate-like part 57, which has a surface directed upwards towards the upper tool part 23, which forms the support surfaces 39, which in the open position of the sealing tool 5 is present between sealing edges 33 following one another along the transport direction 9 and is directed there above the base surface 31 in the direction of the upper tool part 23. The plate-like part 57 has recesses 59 for the sealing edges 33. The individual support element 37 made of Figure 9 can be spring-mounted on the sealing body 27 like the support elements 37 described with reference to the previous figures and can be sunk into the sealing body 27 in the stowed position.

Claims

1. A packaging machine (1), comprising: a sealing tool (5) with a lower tool part (21) and an upper tool part (23) arranged above the lower tool part (21); a provision device (3); and a gripper device (15); wherein the lower tool part (21) comprises a sealing body (27) having a base surface (31) directed in the direction of the upper tool part (23) and sealing edges (33) projecting from the base surface (31) in the direction of the upper tool part (23); wherein the sealing edges (33) are arranged one behind the other along a transport direction (9) and each border a receiving position (35) for a packaging tray (13); wherein at least the sealing body (27) and the upper tool part (23) are movable relative to one another between a closed position of the sealing tool (5) and an open position of the sealing tool (5);wherein the gripper device (15) is configured to pick up packaging trays (13) positioned one behind the other on the provision device (3) along the transport direction (9) and to move them into the pick-up positions in the open position of the sealing tool (5) by movement along the transport direction (9); and wherein the lower tool part (21) comprises at least one support element (37) with at least one support surface (39), which, in the open position of the sealing tool (5), is located between sealing edges (33) following one another along the transport direction (9) and is directed there above the base surface (31) in the direction of the upper tool part (23); 2. Packaging machine according to claim 1, wherein the sealing edges (33) protrude from the base surface (31) by a first length in the direction of the tool upper part (23) and the at least one support surface (39) lies above the base surface (31) by a second length at least in the open position of the sealing tool (5), wherein the second length is equal to or less than the first length.

3. Packaging machine according to claim 2, wherein the second length is at least 50 percent, or at least 70 percent, or at least 80 percent, or at least 90 percent of the first length.

4. Packaging machine according to one of the preceding claims, wherein the gripper device (15) is configured to push the packaging trays (13) over the sealing edges (33) and the at least one support surface (39) for movement along the transport direction (9).

5. Packaging machine according to one of the preceding claims, wherein the at least one support element (37) is arranged to be movable with respect to the base surface (31), in particular in the direction away from the tool upper part (23) or towards the tool upper part (23).

6. Packaging machine according to one of the preceding claims, wherein the at least one support element (37) is resiliently mounted on the sealing body (27).

7. Packaging machine according to one of the preceding claims, wherein the at least one support element (37) is prestressed in the direction of the tool upper part (23).

8. Packaging machine according to one of the preceding claims, wherein the at least one support element (37) is configured to be pushed relatively into the sealing body (27) by contact with the tool upper part (23) when the sealing tool (5) is moved into the closed position.

9. Packaging machine according to one of the preceding claims, wherein the sealing body (27) is configured to be raised in the direction of the tool upper part (23) for moving the sealing tool (5) into the closed position, and wherein the at least one support element (37) is preferably configured not to be raised or to be raised only to a lesser extent than the sealing body (27).

10. Packaging machine according to one of the preceding claims, wherein the at least one support element (37) does not protrude in the direction of the tool upper part (23) relative to the base surface (31) in the closed position of the sealing tool (5).

11. Packaging machine according to one of the preceding claims, wherein the at least one support element (37) is recessed into the sealing body (27) in the closed position of the sealing tool (5).

12. Packaging machine according to one of the preceding claims, wherein the at least one support surface (39) is flush with the base surface (31) in the closed position of the sealing tool (5).

13. Packaging machine according to one of the preceding claims, wherein the upper tool (23) has sealing contours (53) which are configured to be in sealing contact with the base surface (31) around each sealing edge (33) in the closed position of the sealing tool (5).

14. Packaging machine according to claim 13, wherein the sealing contours (53) extend at least partially over the at least one support element (37) in the closed position of the sealing tool (5).

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