EP3983147A1

EP3983147A1 - Seaming roller for a closing apparatus

Info

Publication number: EP3983147A1
Application number: EP19734705.7A
Authority: EP
Inventors: Marco Siegrist; Lukas Meier; Alexander FRIEDEN
Original assignee: Ferrum Packaging AG
Current assignee: Ferrum Packaging AG
Priority date: 2019-06-13
Filing date: 2019-06-13
Publication date: 2022-04-20
Also published as: BR112021023500A2; CN114173953A; US20220193749A1; WO2020249220A1; CA3140938A1

Abstract

The invention relates to a seaming roller for closing a container (200), comprising a rotating body (10) which can rotate on a bolt (11) for closing the container (200). The rotating body (10) comprises a first main side (111) and a second main side (101) which is different from the first main side (111), and a bearing (14). The bolt (11) is arranged on the bearing (14) above the first main side (111) such that the rotating body (10) can be rotated about the bolt (11) in the circumferential direction of the second main side (101) when closing the container. According to the invention, the seaming roller (1) also comprises an exchangeable seaming profile (12) for creating a seam between a container lid (202) and a body (201) of the container (200), and a fastening mechanism (15, 16). The exchangeable seaming profile (12) is detachably connected to the rotating body (10) via the fastening mechanism (15, 16).

Description

Folding roller for a closer The invention relates to a folding roller for closing a container by means of a container lid. The invention further relates to a closer with a folding roller according to the invention.

When filling beverage cans or food cans, the cans pass through a can closer after being filled with the beverage or the food, the filled can bodies entering via a feed path and can lids via a further feed path. The can closer usually has several stations of the same type arranged in the form of a carousel, in each of which a can is closed with a can lid. The can lids are guided onto the can body and held on the can body with a retaining plate of a seaming head. This holding also serves to fix the cans in place in the can closer so that they cannot break out of the cans

traversed circular path due to centrifugal force. By doing

Can seamer, the can body with the can lid is folded on the edge side over a folding roller and thus closed. As a rule, the can with the can lid is additionally rotated around its own axis of symmetry by means of the seaming head.

A can closer of the generic type is described in DE 749636 and DE4234115 A1. The can seamer includes a

Clamping device for holding a can to be closed. In the operating state, the can to be closed is in the clamping device introduced and secured by this in the axial and radial directions.

Likewise, a can lid is placed centered over the can opening of the can to be closed. In the region of the can opening, the can has a circumferential can flange and the can lid has a circumferential can lid flange. To close the can opening through the can lid, the can closer additionally comprises two folding rollers, each rotatably mounted about an axis, which form the can flange and the

Press the can lid flange together by means of an essentially radially acting force, the pressing being carried out by continuous rolling in the circumferential direction along the circumference of the can opening.

Another can closer is known from GB 2098899 A. The can closer comprises a clamping device for receiving the can to be closed and a folding roller. In the operating state, the can to be closed is placed in the clamping device and secured by it in the axial and radial directions. Likewise, a can lid is placed centered over the can opening of the can to be closed. In the area of the can opening of the can body, the can has a circumferential can flange and the can lid has a circumferential one

Can lid flange. In order to close the can opening through the can lid, the can closer comprises a folding roller which is rotatably mounted about an axis in each case and which forms the can flange and the can

Press the can lid flange together, the pressing being carried out by continuous rolling in the circumferential direction along the circumference of the can opening.

To explain this closing module, reference is made below to FIG. 1, on the basis of which the prior art described above is described in somewhat more detail. To distinguish the prior art from the present invention, the reference numerals that refer to

Features of known examples of the folding roller relate to a Apostrophes, while features according to the invention

Embodiments are provided with reference numerals that do not

Wear apostrophes.

Fig. 1 shows a sectional view of a known can closer 1000 "with a can 200" to be closed and a can lid 202 ".

According to FIG. 1, the known locking module 1000 includes a

Clamping device, which comprises a can support 22 ‘and a hemming head 20, and a hemming roller 10’ with a hemming roller profile rotatably mounted around the bolt 1 1 ’. The can lid 202 ‘is arranged in a centered manner over the opening of the can body 201‘. The can body 201 ‘has in

Area of the can opening a circumferential can flange and the

Can end 202 ‘has a circumferential can end flange.

During the closing process, the folding roller 1 is' over the

Seam roller profile in contact with the can flange and the

Can lid flange brought. Here, the can flange and the can lid flange are pressed together by means of an essentially radial force via the seaming roller 1 '. The pressing takes place by continuously rolling the folding roller 1 'in the circumferential direction along the circumference of the can opening. By folding the can body 201 ‘with the can lid 202‘, a double seam is preferably produced.

The folding roller 1 ’disclosed in GB 2098899 A for closing a can 200‘ consists of the bolt 1 1 ’and a rotatable one

Rotary body 10 ‘, which attaches with the rebate profile to the can 200‘. The body of revolution 10 ‘is cylindrical and has a first, round one

Base side and a second, round base side opposite the first round base side. Inside the hemming roller 1 'there is a bearing for receiving the bolt 11', the bolt 11 'being mounted in the bearing via the first base side. The rotary body 10 'can thus be closed when it is closed of the can 200 'rotate around the bolt 11' in the circumferential direction of the second base side. Here, the rebate profile is usually in contact with the

Can lid 202 ‘and then the can 200‘ along it

Can axis X ‘rotates.

A major disadvantage of those known from the prior art

The reason for folding rollers is that changing the folding rollers is both expensive and very time-consuming.

Durable hemming rollers are made of high-performance materials in order to be able to close large quantities of cans in a short time

to ensure reliable work of the can seamer, especially in continuous operation. Because the whole body of revolution from demanding

Must be made of materials, the folding rollers are very expensive or, due to the dimensions, cannot be made from many materials. Is the folding roller worn or should a different combination of can and

If the box lid is closed, the folding roller must be changed. To do this, the folding roller with the bolt must be replaced in order to install a new, unused folding roller or to change the folding roller tool. However, it is not just the removal and installation of the folding roller that has to be carried out, but the entire can seamer has to be laboriously readjusted after changing the folding roller. This is not only time-consuming, but also always requires a specialist to correctly adjust the machine after the change.

The object of the invention is therefore to provide a folding roller for a closer, which is those known from the prior art

avoid adverse effects. In particular, a hemming roller and a closer are to be provided by means of which both costs for the hemming rollers and downtimes due to a tool change are significantly reduced. The object is achieved by a folding roller according to the invention for closing a container, as well as a closer comprising the folding roller according to the invention.

According to the invention, a hemming roller for closing a container is comprised of a rotating body rotatable on a bolt

suggested. The rotating body has a first base side and a second base side different from the first base side, as well as a bearing. The bolt is arranged over the first base side on, in particular in the bearing in such a way that the rotational body can be rotated around the bolt in the circumferential direction of the second base side when the container is closed.

In contrast to the prior art, the hemming roller comprises an exchangeable hemming profile for crimping a container lid with a body of the container and a fastening mechanism. The

The exchangeable rebate profile is releasably connected to the rotating body via the fastening mechanism.

This has the following advantages. On the one hand, the amount of high-performance materials that are used for the hemming roll is much lower, since only the hemming profile has to be made from it. On the other hand, the rebate profile can be changed much faster as a result of wear or if a tool change is necessary. Since the rebate profile is detachably connected to the rotational body, it can be easily exchanged when changing without further adjustment of the closer. When changing, it is not necessary to replace the entire hemming roller with the bolt, but only the hinge profile, which can be changed quickly and easily by removing it from the rotating body after releasing the fastening mechanism. So it's not

Adjustment of the bolt and the bearing on the folding roller and closer is necessary. The container preferably consists of the container lid /

Container closure and the body, the body with the

Container lid / container cap is closed. The container can be a container and in particular the container can be a can with a can lid and with a can body. The closer is then accordingly a can closer.

To close the can / container, the rotational body is in contact with a rebate profile in the operating state

Can lid flange / lid flange of the can lid / container lid brought. By rotating the can / the container, the folding roller is then rotated in the circumferential direction of the can / the container and in the circumferential direction of the second base side, the can flange / flange with the

Can lid flange / lid flange is folded.

In the context of the present application, “second base side different from the first base side” can not only be understood to mean that the second base side is a base side separate from the first base side. In practice, the second base side can lie opposite the first base side (that is, opposite sides of a three-dimensional body) and in particular also lie opposite one another in parallel.

Within the scope of the invention, the can can be understood to be a rotationally symmetrical container which is closed by means of the can closer and the associated folding roller. A can can preferably comprise a metal, in particular aluminum.

The fact that the exchangeable rebate profile is detachably connected to the rotating body via the fastening mechanism can be understood within the scope of the invention to mean that the rebate profile for the operating state and the rebating of the cans / the containers via the fastening mechanism the rotating body is fixed and when changing by loosening the

Attachment mechanism can be removed from the rotating body.

In practice, the fastening mechanism can have a pin on the

Rotary body and include a notch on the rabbet profile. At the

Fastening the rebate profile, the notch of the rebate profile can be guided on the pin of the rotary body in order to connect and fix the rebate profile with the notch on the pin of the rotary body in a rotationally fixed and non-positive manner. In particular, the pin and the corresponding notch can be designed as a bayonet lock, so that the

Rebate profile is positively connected to the rotation body after the pin is inserted into the notch, for example by rotation. For this purpose, the notch could be designed as a curve or an angle.

Of course, the rotary body could also include a corresponding notch and the rebate profile a respective pin.

The folded profile is particularly preferably attached to the rotational body from the second base side.

In an embodiment of the invention, the rotary body can comprise a cover for sealing the bearing. The cover is here removably arranged on the second base side of the rotary body and closes the bearing, which is preferably arranged in the interior of the rotary body. The cover prevents lubricants from leaking out of the bearing.

In a particularly preferred embodiment, the cover can encompass the pin of the fastening mechanism. Here, the cover is rotatably arranged on the second base side of the rotary body. When the rebate profile is attached, the rebate profile with the notch is placed in a first cover position over the pin of the cover on the rotary body. Then the lid is rotated from the first lid position to a second lid position, with the pin in or above the Notch is moved so that the rebate profile is non-rotatably and non-positively connected to the rotational body. Here, too, there is preferably a bayonet lock mechanism.

The cover can be designed differently within the scope of the invention. In principle, the cover is a plate which is preferably designed as a plate with at least one corner. A corner does not have to have an angle, but can also be curved or oval curved.

In particular, the cover can alternatively have a shape that corresponds to the second base side of the rotational body. The cover can also be designed as a polygon, that is to say a polygon-shaped cover, in particular a polygon-shaped plate. The cover can have a symmetrical or an asymmetrical polygon shape. At least one corner of the polygon is then designed as a pin of the fastening mechanism, which is used to fix the rebate profile with the notch. As also described above, when the rebate profile is attached, the rebate profile with the notch is in a first

Lid position attached to the rotating body via the lid. The rebate profile has in particular a polygonal cover

Corresponding shape so that the rebate profile can be guided as precisely as possible over the cover. Then the lid is off the first

Lid position rotates into a second lid position, with the corner (or corners) of the polygon being moved as a pin over the notch, so that the rebate profile is non-rotatably and non-positively connected to the rotating body. Of course, the cover could also have notches and the rebate profile the corresponding tenons.

In principle, the cover can have any shape as a polygon as long as there is at least one corner, preferably two corners, which act as pegs. The cover could also be designed as an ellipsoid be. As mentioned above, the corner does not have to have an angle, but can also be curved or oval curved.

This embodiment, in which the rebate profile is attached to the rotating body via the cover, has an additional advantage. The cover does not have to be removed from the rotating body and therefore from the bearing for the assembly of the rebate profile. Thus, the bearing remains closed and consequently the escape of lubricants from the bearing is prevented, which is of great relevance for the closing of cans filled with food or beverages.

In order to explain the above fastening mechanism in more detail, it is briefly explained in more detail below using a square. However, the fastening mechanism works equally for other polygons or plate-shaped covers with at least one pin. The cover is designed as a square plate and attached to the second base side of the rotating body. The folded profile has a corresponding square shape. When attaching the

With the rebate profile, the rebate profile is pushed onto the rotating body via the cover on the second base side. As a result, the notches and pegs are superimposed. By rotating the cover, the corners of the cover are rotated onto the edges of the rebate profile and thus the rebate profile is fixed.

In practice, the fastening mechanism can also be an am

Rotary body arranged thread and a mating thread arranged on the cover comprise, the rebate profile as above

is described on the cover attached to the rotating body. The rebate profile is fixed by a thread rotation when the thread is turned off between the cover and the rotating body. In a further important embodiment, the folding roller according to the invention comprises a securing mechanism, the securing mechanism being arranged between the rotating body and the cover, so that the rotation of the cover is limited, in particular is limited to the rotation from the first cover position to the second cover position. The

Safety mechanism can be designed as a safety pin which is arranged in a recess in the thread of the cover. The recess has a recess extension in the direction of rotation of the thread, that is, in the circumferential direction of the second base side, so that the rotation of the cover is limited to the recess extension.

This prevents the cover from being completely detached from the rotating body and thus from the bearing, in order to prevent lubricants from escaping and thus contamination of the drinks and food in the can. In order to remove the cover completely, the pin must therefore first be removed from the device. Alternatively, the

Safety mechanism can also be equipped with a color marking device, for example in the form of a color capsule pen, so that opening of the warehouse can be traced. Particularly preferably, a seal can also be arranged between the cover and the rotating body, so that the escape of lubricants can be avoided in any case.

In a particularly advantageous embodiment of the invention, the fastening mechanism can, as an alternative to the measures described above, comprise a thread arranged on the rotary body and a mating thread arranged on the rebate profile, so that the rebate profile can be screwed onto the rotation body. Here, the thread of the rotary body is preferably arranged on the second base side.

In practice, the first base side and / or the second base side of the rotating body can have a round shape. The

Body of revolution be designed as a cylindrical body of revolution. In the case of a cylindrical body of revolution, the rebate profile is preferably designed as a rebate profile ring. As is already known in the prior art, the bearing of the hemming roller can be a ball bearing or a cylindrical roller bearing.

According to the invention, a closer comprising the

inventive folding roller for closing the container comprising the rotating body rotatable on the bolt proposed. The

Rotary body has a first base side and a second base side different from the first base side, as well as a bearing. The bolt is arranged on the bearing over the first base side in such a way that the rotary body can be rotated around the bolt in the circumferential direction of the second base side when the container is closed. The folding roller includes a

exchangeable folded profile for seaming a container lid with a body of the container and a fastening mechanism. The

In principle, the closer according to the invention can be analogous to the can seamers already known from the prior art, but differs in the seaming roll. This has the advantage that the known can closer / closer with the old seaming rollers can be modified with the seaming rollers according to the invention, in order to avoid the disadvantages of the prior art.

In practice, as described in the prior art, the can closer comprises the clamping device with which the container is fixed in the axial and radial direction for closing and with which the container can be rotated in the circumferential direction to crimp the container flange (body flange) and the lid flange.

In principle, the closer can also comprise at least two hemming rollers according to the invention with preferably different hemming profiles so that containers / cans can be closed according to a double hemming principle, in which the containers / cans are usually closed in two stages. One folding roller is responsible for each step. The first folding roller makes a pre-fold, while the second folding roller completely closes the can / container. In the following, the invention and the prior art are explained in more detail using exemplary embodiments with reference to the drawings.

1 shows a schematic representation of the prior art;

2 shows a schematic representation of an inventive

Folding roller;

3 shows a schematic representation of a view of a second

Base of a folding roller according to the invention;

Fig. 4 is a schematic representation of another

Exemplary embodiment of a folding roller according to the invention in cross section;

Fig. 5 is a schematic representation of the inventive

The folding roller of FIG. 4 as a partial section;

6 shows a schematic representation of a further

inventive folding roller in cross section. 7 shows a schematic representation of an inventive

Can seamer.

FIG. 1 shows a schematic representation of the prior art, which has already been described above. As mentioned above the reference numerals of FIG. 1 have an apostrophe, since they relate to the known prior art.

Fig. 2 shows a schematic representation of an inventive

Folding roller, which is referred to below with the reference number 1.

According to FIG. 2, the folding roller 1 comprises a cylindrical rotary body 10 rotatable on a bolt 11 for closing a can (not shown here), the cylindrical rotary body 10 being a first round one

Base side 111, and a round second base side 101 different from the first base side 111, as well as a bearing (not shown here). The bolt is arranged in the bearing via the first base side 111, so that the rotary body 10 can rotate around the bolt 11 in the circumferential direction of the second base side 101 in the operating state when the can is closed.

The hemming roller 1 has an exchangeable hemming profile 12, which is shown separately, that is not fixed to the rotational body. According to the invention, the folding roller 1 comprises a fastening mechanism, the exchangeable folding profile 12 being releasable with the fastening mechanism via the fastening mechanism

Rotary body 10 is connected. The folded profile 12 can be on the

Rotary body 10 are plugged on from the second base side 101 and is then non-rotatably and non-positively connected to the rotary body 10 by means of the fastening mechanism

In the present exemplary embodiment, the folded profile 12 is designed as a folded profile ring 12. For crimping a can lid with a can body of the can, the hemming roller 10 is via the hemming profile 12 in contact with the

Can lid flange brought. Here, the can flange and the can lid flange are pressed together by means of an essentially radially acting force via the seaming roller 10. The pressing takes place by continuously rolling the folding roller 10 in the circumferential direction along the circumference of an opening of the can.

3 shows a schematic representation of a view of the second base side 101 of the folding roller 1 according to the invention.

According to FIG. 3, the folding roller 1 comprises a cover 13 for sealing the bearing, the cover 13 being removably arranged on the second base side 101 of the rotary body 10.

In the embodiment according to FIG. 3, the fastening mechanism 15, 16 comprises a pin 15 on the cover 13 of the rotating body 10 and one

Notch 16 on the folded profile ring 12.

The cover 13 is designed as a polygon, so as a polygon-shaped plate 13. Corners 15 of the polygon serve as pins 15 for the

Fastening mechanism 15, 16, which is used to fix the folded profile ring 12 with the notch 16. The notches 16 of the

Folded profile rings 12 correspond to the pins 15 of the cover 13 and are located on an inner circumference of the folded profile ring 12.

When attaching the folded profile ring 12, the folded profile ring 12 with the notch 16 is placed in a first cover position over the cover 13 on the rotary body 10. The folded profile ring 12 has a shape corresponding to the polygonal cover 13 so that the folded profile ring 12 fits over the cover 13 as precisely as possible. After attaching the folded profile ring 12 to the rotating body 10, the lid 13 is rotated from a first lid position to a second lid position, the corner (or corners) of the polygon being moved away from the notches 16 as a pin 15, so that the folded profiled ring 12 with the rotating body 10 is rotatably and non-positively connected. The fastening mechanism 15, 16 is designed as a bayonet lock. The bayonet lock functions in such a way that the cover 13 is designed as a polygon 13 and is attached to the second base side 101 of the

Rotary body 10 is attached, whereby the bearing is sealed by the cover 13. In principle, by rotating the cover 13, the corners 15 of the cover 13 are rotated from the notches 16 of the folded profile ring 12 onto the edges (between two notches 16) of the folded profile ring 12, whereby the folded profile ring 12 is fixed on the rotating body 10, since one exerted by the cover 13 Force on the folded profile ring 12 in the direction of the

Rotary body 10 acts, through which the folded profile ring is clamped.

Particularly preferably, the fastening mechanism 15, 16 can additionally include a thread arranged in the rotary body 10 and a corresponding mating thread arranged on the cover 13, so that the cover 13 is attached to the second base side 101 of the rotary body 10

can be screwed on and the rotation for fixing the folded profile ring 12 takes place via the thread / mating thread.

Fig. 4 shows a schematic representation of another

Embodiment of the inventive folding roller 1 in cross section.

According to FIG. 4, the rotating body 10 includes the bearing 14 in the interior, the bolt 11 being arranged in the bearing 14 via the first base side 111.

In addition, a sealing ring 18 is arranged between the cover 13 and the rotary body 10, which seals and closes the bearing 14 in order to prevent lubricants from escaping.

The sealing ring 18 is preferably an elastic element which is pressed together with the cover 13 when the bearing 14 is closed. FIG. 5 shows a schematic representation of the inventive folding roller 10 from FIG. 4 as a partial section.

Fig. 6 shows a schematic representation of another

Embodiment of the inventive folding roller 1 in cross section. According to FIG. 6, the folding roller 1 with the sealing ring 18 comprises between the cover 13 and the rotary body 10. The folding roller 10 also comprises a securing mechanism 17, the

Securing mechanism 17 is also arranged between the rotary body 10 and the cover 13, so that the rotation of the cover 13 is limited, in particular is limited to a rotation from the first cover position into the second cover position.

The securing mechanism 17 is designed as a securing pin 17 which is arranged in a recess 19 in the cover 13. The

Recess 19 has a recess extension in the direction of rotation of the cover 13 or in the circumferential direction of the second base side, so that the rotation of the cover 13 is limited to the recess extension. This prevents the cover 13 from being completely removed

Rotary body 10 and thus from the bearing (not shown here) is detached in order to prevent leakage of lubricants and thus contamination of the cans. In order to remove the cover 13 completely, the locking pin 17 must therefore first be detached. In the rotation body 10 and also in the folded profile 12 suitable openings for introducing the

Locking pin 17 may be provided.

Fig. 7 shows a schematic representation of an inventive

Can closer 1000, in which a can 200 to be closed with a can lid 202 and a can body 201 is arranged. According to Fig. 7, the can closer 1000 according to the invention comprises a clamping device 20, 22, which comprises a can support 22 and a folding head 20, and the folding roller 10 with the exchangeable folding roller profile 12 rotatably mounted around the bolt 11. Above the opening of the can 200 is the can lid 202 centered. The can body 201 has a circumferential can flange in the region of the can opening and the can lid 202 has a circumferential can lid flange. In the operating state of the can closer 1000, the can 200 is rotated about its axis of symmetry X by the clamping device 20, 22. During the closing process, the folding roller 1 is pulled over the

Folding roller profile 12 brought into contact with the can lid flange. Here, the can flange and the can lid flange are pressed together by means of a substantially radially acting force via the seaming roller 1. The pressing takes place by continuously rolling the seaming roller 1 in the circumferential direction along the circumference of the can opening.

The folding roller 1 according to the invention for closing the can 200 comprises the bolt 11 and the rotary body 10, which attaches to the can 200 with the folding profile 12. The rotary body 10 is cylindrical and the cover 13, which is arranged on the second base side of the rotary body 10, fixes the exchangeable folded profile 12 with the

Attachment mechanism 15 to the rotating body 10.

Claims

1. Folding roller for closing a container (200) comprising a rotating body (10) rotatable on a bolt (11) for closing the container (200), the rotating body (10) having a first base side (111) and one of the first base side (111) comprises different second base side (101) and a bearing (14), the bolt (11) being arranged on the bearing (14) over the first base side (111) so that the rotating body (10) in Circumferential direction of the second base side (101) is rotatable about the bolt (11), characterized in that the folding roller (1) has an exchangeable folding profile (12) for folding a container lid (202) with a body (201) of the container (200) and a fastening mechanism (15, 16), the exchangeable rebate profile (12) being detachably connected to the rotary body (10) via the fastening mechanism (15, 16).

2. Folding roller according to one of the preceding claims, wherein the

Fastening mechanism (15, 16) comprises a pin (15) on the rotating body (10) and a notch (16) on the folded profile (12), and that

Falzprofil (12) with the notch (16) with the pin (15) on

Rotary body (10) can be connected non-rotatably and non-positively.

3. Folding roller according to claim 1, wherein the rotary body (10) comprises a cover (13) for sealing the bearing (14) and the cover (13) is detachably arranged on the second base side (101) of the rotary body (10).

4. folding roller according to claim 2, wherein the rotary body (10) comprises a cover (13) for sealing the bearing (14) and the cover (13) is detachably arranged on the second base side (101) of the rotary body (10), wherein the Cover (13) comprises the pin (15) and the cover (13) can be rotated on the second base side (101) of the

Rotary body (10) is arranged that the rebated profile (12) with the notch (16) can be plugged in a first cover position over the cover (13) on the rotary body (10) and after rotation of the cover (13) from the first cover position is non-rotatably and positively connected to the rotary body (10) in a second cover position.

5. folding roller according to claim 4, wherein the cover (13) is a polygon,

is in particular a symmetrical or an asymmetrical polygon and one corner of the polygon is designed as a pin (15) of the fastening mechanism (15, 16).

6. folding roller according to one of claims 3 to 5, wherein the

Fastening mechanism (15, 16) a thread arranged on the rotating body (10) and a thread arranged on the cover (13)

Comprises mating thread, wherein the rebate profile (12) is attached to the rotary body (10) via the cover (13).

7. Folding roller according to one of claims 3 to 6 comprising a

Securing mechanism (17), the securing mechanism (17) being arranged between the rotating body (10) and the cover (13) so that the rotation of the cover (13) is limited.

8. folding roller according to claim 1, wherein the fastening mechanism (15, 16) comprises a thread arranged on the rotary body (10) and a mating thread arranged on the folding profile (12).

9. folding roller according to claim 7, wherein the securing mechanism (17) is a securing pin (17).

10. Folding roller according to one of the preceding claims, wherein the first

Base side (111) and / or the second base side (101) are round.

11. Folding roller according to one of the preceding claims, wherein the

Rotary body (10) is a cylindrical rotary body (10) and the folded profile (12) is a folded profile ring (12).

12. Folding roller according to one of the preceding claims, wherein the bearing (13) is a ball bearing or a cylindrical roller bearing.

13. Folding roller according to one of claims 3 to 7, wherein a seal (18) between the cover (13) and the rotating body (10) is arranged so that leakage of lubricants from the bearing (14) is avoided.

14.Verschliesser comprising a folding roller (1) according to one of the

overriding claims.

15. Closer according to claim 14, comprising a clamping device (20, 22).

16. Closer according to one of claims 14 to 15, comprising

at least two folding rollers (1) according to one of claims 1 to 13.