CN113710413A

CN113710413A - Flexure assembly for a cover

Info

Publication number: CN113710413A
Application number: CN202080030362.9A
Authority: CN
Inventors: M·斯卡隆; A·贝鲁奇; A·F·布西纳罗
Original assignee: Remote Control Robot Co ltd
Current assignee: IMA Industria Macchine Automatiche SpA
Priority date: 2019-04-23
Filing date: 2020-04-22
Publication date: 2021-11-26
Anticipated expiration: 2040-04-22
Also published as: WO2020217186A1; CN113710413B; IT201900006222A1; EP3959032A1

Abstract

A bending assembly (1) for a cover is provided, comprising a cover (2), the cover (2) having a closure housing (20), the closure housing (20) having a base and a cylindrical wall provided with a peripheral edge (2a), the peripheral edge (2a) being receivable on an inner wall thereof for a warranty seal (21), the bending device comprising a clamping member (3) designed for firmly connecting the closure housing (20), and a deformation member (4) comprising a locking element (400) and a deformation ring (42), the deformation ring (42) being mounted so as to be slidable around the locking element (400), wherein the clamping member (3) and the locking element (400) are mutually movable along a common main axis (1a) between a rest position, in which the locking element (400) is moved away from the clamping member (3), and a locking position, in which, when the closure housings (20) are connected by the clamping member (3), the locking element (400) passes through the closure housing (20); wherein the deformation ring (42) is mounted slidable along the main shaft (1a) and is movable with respect to the locking element (400) between a retaining position, in which the deformation ring (42) and the clamping member (3) are located at a first predetermined distance, and a bending position, in which the deformation ring (42) and the clamping member (3) are located at a second predetermined distance, which is smaller than the first predetermined distance, wherein, when the deformation ring (42) is in the bending position and the locking element (400) is in the locking position, the deformation ring (42) is configured and shaped to abut against an outer wall of the peripheral edge (2a), so as to plastically deform the peripheral edge (2a) by a pressure exerted only on the outside of the peripheral edge (2 a).

Description

Flexure assembly for a cover

Technical Field

The present invention relates to a bending assembly for a cover of the type specified in the preamble of claim 1.

In particular, the present invention relates to a bending assembly designed to enable the assembly of a closure shell of a lid, wherein a protective seal is partially contained within the lid shell, for lids mainly used in the food field.

Background

As is known, food lids are characterized by two main parts: a warranty seal that closes the outer shell and product to prove proper closure of the food container or to indicate that it has been opened.

One example of a warranty seal is a ring consisting of a screw cap on a conventional liquid bottle (e.g., soft drink, water, or other liquid) that is inserted by interlocking it with the closure shell.

As previously mentioned, the machining of the caps is generally carried out by highly automated machines capable of machining a plurality of parts (in particular caps) in series.

In particular, these machines may comprise linear or rotary mechanisms, comprising spindles, aligned in a line or arranged radially with respect to a central axis, designed for removing the caps or portions of caps from the continuous line, and designed for machining the caps themselves or at least a portion of their components along the machining line.

Once the process is complete, the completed lids are transported back to the production line away from the processing machine.

Typically, there is at least one cutting step and one coupling step during the cap production cycle.

In the cutting step, the gripping member removes a portion of the cover, usually the warranty seal, in order to cut the latter and prepare it for connection with the containment vessel.

Typically, the cutting is performed by a rotating blade centred with respect to the gripping member, and therefore both the gripping member and the cutting member are equipped with a rotating or static spindle which is synchronized and centred with respect to each other, in order to achieve a precise machining.

Similarly, the coupling step is carried out by means of a gripping member equipped with a rotating main shaft that overlaps the portions of the cover with each other, and a crushing member designed for processing a portion of the closed shell by plastic deformation, while the latter is rotated by means of the main shaft.

Therefore, in order to complete the coupling, it is necessary to wait for the crushing member to pass through the entire edge of the cover, in particular the perimeter defined by the closure shell.

The described prior art therefore contains some significant drawbacks.

In particular, the crushing members, for example the movable probes in a predetermined direction, need to be perfectly coordinated with the processing line and within the time required to complete the rotation of the main shaft.

Any inaccuracies may therefore lead to a number of subsequent errors in the lid processing, with catastrophic consequences on production.

Furthermore, the processing time, in particular the coupling time, is strictly dependent on the path taken by the crushing member, and therefore is not very fast compared to machines that perform other processing steps, with the result that the production speed of the finished caps is reduced.

Disclosure of Invention

In this case, the technical task underlying the present invention is to devise a flexure assembly for a lid that is able to substantially avoid at least some of the above-mentioned drawbacks.

In said technical task, an important object of the present invention is to obtain a flexing assembly which is easily and permanently synchronized with the supply lines of the cover and the cover component, in order to connect the warranty seal and the closure shell.

Another important object of the invention is to produce a curving assembly that allows to increase the production speed of the finished caps, but avoids the losses of efficiency and coupling safety.

Said technical task and the specified objects are achieved by a flexure assembly for covers as described in the appended claim 1.

Preferred embodiments are described in the dependent claims.

Drawings

The features and advantages of the present invention will be set forth in the following detailed description of some preferred embodiments of the invention, which refers to the accompanying drawings, in which:

FIG.1 shows a side cross-sectional view of a flexure assembly for a lid according to the present invention, in which flexure is complete;

figure 2 shows a simplified view of a part of a lid machining apparatus comprising a lid and/or a curved assembly of lid parts according to the invention;

FIG.3a is a schematic view of the cover before bending; and

figure 3b shows a schematic view of the cover after bending to form a coupling socket;

FIG.5 shows a cross-sectional side view of a flexure assembly for a cover according to the present invention with the deformable ring in the flexed position and the locking member in the locked position; and

fig. 6 shows a cross-sectional side view of a flexure assembly for a cover according to the present invention with the deformable ring in the retaining position and the locking element in the rest position.

Detailed Description

In this document, when measured values, shapes and geometric references (such as perpendicularity and parallelism) are associated with "approximately" or other similar terms (such as "almost" or "substantially"), they are to be understood as being free of measurement errors or inaccuracies due to production and/or manufacturing errors, and most importantly, as being free of slight differences in the values, measured values, shapes or geometric references associated therewith. For example, if associated with a value, these terms preferably indicate a deviation of no more than 10% of the value itself.

Furthermore, when terms such as "first," "second," "upper," "lower," "primary," and "secondary" are used, they do not necessarily identify an order, relational priority, or relative position, but they may simply be used to more clearly distinguish between the different components.

Unless otherwise indicated, the measurements and data reported herein are to be considered to be made in the International Standard atmospheric ICAO (ISO2533: 1975).

With reference to the figures, a bending assembly for a cover according to the invention is indicated as a whole with the reference number 1.

The assembly 1 comprises bending means designed for making a plurality of lids 2 and at least one lid 2.

In general, the device 1 is preferably part of a processing apparatus 10 for caps 2.

The apparatus 10 is preferably an apparatus designed for processing caps 2 of various types, for example screw caps 2 for glass bottles and the like, for example for closing paper and/or plastic packages, for example by the Lele company

The produced package is used for containing fruit juice or milk and the like.

Preferably, the cap 2 being machined generally comprises at least two parts: a closure housing 20 (e.g., made of metal) and a warranty seal 21 (e.g., made of a polymeric material).

The closure housing 20 is part of a cap designed to close a bottle. It may be made of various materials, such as a polymeric material or a metal, more specifically aluminum, and may or may not include internal threads. Typically, but not necessarily, the cap 2 may also include a knurled or perforated portion to improve the effectiveness of the grip and to enable the user to easily twist the cap.

However, warranty seal 21 is preferably an annular portion, for example made of a polymer, that can be interlocked with the interior of closure shell 20 at the shell edge.

In particular, the closure housing preferably defines a peripheral edge 2 a.

The peripheral edge 2a is the part of the closure shell 20 designed to receive the warranty seal 21 and preferably corresponds to the part of the closure shell 20 near the opening.

Accordingly, the warranty seal 21 is preferably mounted substantially along the peripheral edge 2a of the closure shell 20.

Furthermore, the peripheral edge 2a is generally larger in cross-section than the rest of the closure housing 20, so as to form a kind of shoulder, thus forming a circular base.

In summary, the closure housing 20 defines a base and a cylindrical wall provided with a peripheral edge 2a, the inner wall of which can receive the warranty seal 21.

The apparatus 10 preferably comprises at least a bending device and at least a part of the assembly line 7.

The assembly line 7 is preferably a conveyor capable of moving the cover 2 or the cover part 2 (e.g., the closure shell 20 and the warranty seal 21), respectively, along a predetermined trajectory.

In particular, the assembly line 7 may be composed of a plurality of elements designed to define an assembly path 7 a.

The assembly path 7a may be defined by conveyor rollers or other gripping elements that move and are designed for transporting objects thereon.

In the prior art, there are many examples on the market of different assembly lines 7 defining different assembly paths 7 a.

The assembly line 7 also defines an assembly plane 7 b.

The fitting plane 7b includes the fitting path 7a, and is preferably a plane along which the cover 2 or the cover member 2 is placed.

For example, if the assembly line 7 comprises conventional conveyor belt rollers, the assembly plane 7b is defined by the belt surface on which the rollers move, while the assembly path 7a is defined by the direction of movement of the belt applied on the rollers.

In any case, along at least a portion of assembly path 7a, apparatus 10 preferably includes one or more devices 1.

The bending device 1 therefore preferably defines a transfer station included in the apparatus 10 itself.

If the cover 2 is of the type described above, the apparatus 10 can comprise means dedicated to cutting the warranty seal 21 and the corresponding assembly line 7, and means 1 dedicated to closing the coupling between the casing 20 and the warranty seal 21. The latter is therefore preferably operatively connected to two assembly lines 7, one of which, in detail, transports the warranty seal 21 from the cutting device and the other the closure shell 20.

As previously mentioned, the assembly includes a bending device.

The bending device preferably defines at least one main axis 1 a.

The main shaft 1a preferably defines the machine direction of the device 1.

Thus, when the device 1 is part of an apparatus 10, the main axis 1a is preferably perpendicular to the assembly plane 7 b.

The bending device preferably comprises at least one clamping member 3 and one deformation member 4.

Here we do not discuss and describe the electromechanical means for driving the

members

3, 4, since they are known in the art, or they are easy to produce, mainly piston engines, or more generally, designed to allow the object to move in a specific direction.

Furthermore, the motor means may be powered in various ways, and the

members

3, 4 may be operatively connected to motors independent of each other, or to a single motor which coordinates the movement of both

members

3, 4.

The clamping member 3 is preferably designed to permanently connect at least a part of the cover 2.

In particular, the clamping member 3 is preferably designed to securely connect the closure housing 20. The warranty seal 21 itself can be prepared and already partly enclosed in the closure housing 20 and can thus also be attached to the clamping member 3.

However, the warranty seal 21 is preferably attached to the deforming member 4.

Thus, the clamping member 3 comprises a first portion 30 and a second portion 31.

Preferably, the first portion 30 and the second portion 31 are mutually movable along the main axis 1a to lock the closure housing 20. In particular, the relative movement between the

portions

30, 31 enables the closure housing 20 to be permanently locked.

In particular, the first portion 30 defines a support plane 3 a.

The support plane 3a is preferably perpendicular to the main axis 1 a. Thus, for example, the support plane 3a may be coplanar with respect to the assembly plane 7b or parallel to the same assembly plane 7 b.

The second portion 31 defines a work plane 3 b.

The machining plane 3b is preferably perpendicular to the main axis 1 a.

Thus, for example, the working plane 3b may also be coplanar with respect to the assembly plane 7b or parallel to the same assembly plane 7 b.

Preferably, the second portion 31 completely surrounds the first portion 30 in such a way as to form at least one machining seat 32 when the

planes

3a, 3b are spaced from each other.

The process bowl 32 is preferably substantially a chamber in which the closure housing 20 is partially contained. Furthermore, the closure housing 20 is preferably located on the support plane 3a, and the peripheral edge 2a at least partially surrounds said closure housing 20 and projects towards the work plane 3 b.

In a preferred embodiment, the first portion 30 may thus be a cylinder centered along the main axis 1a, and the second portion 31 may be a hollow cylinder concentric with the first portion 30.

In this way, the tooling seat 32 is substantially counter-formed to at least a portion of the closure housing 20.

Furthermore, the first portion 30 is preferably fixed between the two

portions

30, 31, while the second portion 31 is moved and advanced along the main axis 1a so as to separate the

planes

3a, 3 b. Thus, when the devices of the assembly 1 are arranged in the apparatus 10, the support plane 3a is preferably coplanar with the assembly plane 7 b.

In particular, the second portion 31 preferably advances towards the deformation member 4.

The deformation member 4 is preferably designed to plastically deform the lid 2. In particular, the deformation member 4 is designed to deform the cover 2 at the peripheral edge 2a when moving with respect to the gripping member 3, so as to form the connection seat 22 on the cover 2.

The connecting seat 22 is therefore basically a cavity formed by the deformed periphery 2a, ensuring the seal 21 to be locked inside it.

The deformation member 4 and the gripping member 3 are advantageously made to plastically deform the peripheral edge 2a under pressure by a single translation with respect to each other along the main axis 1 a.

The deformation member 4 defines a first plane 4 a.

The first plane 4a is preferably perpendicular to the main axis 1 a.

Thus, for example, the first plane 4a may also be parallel to the mounting plane 7 b.

Furthermore, the deformation member 4 comprises a locking element 400.

The locking element 400 is preferably configured to lock on command the closure housing 20 located on the gripping member 3.

In this regard, the gripping member 3 and the locking element 400 move relative to each other along the main axis 1 a. Thus, the clamping member 3 and the locking member 400 define at least one rest position, in which the locking member 400 is remote from the clamping member 3, and a locked position, in which the locking member 400 passes through the closure housing 20 when the closure housing 20 is connected by the clamping member 3.

More specifically, locking element 400 includes a hollow cylinder 40.

The hollow cylinder 40 is part of a deformation member defining a first plane 4 a. The term "plane" means that the hollow cylinder 40 defines at least one lower annular edge designed to enable the locking element 400 to perform its intended operation. Therefore, the hollow cylindrical body 40 preferably has a lower annular edge lying on the first plane 4a, so that the first plane 4a is aligned with the support plane 3a when the locking element 400 is in the locking position.

In addition, as previously described, the hollow cylinder 40 may also be used to attach the warranty seal 21. In this case, hollow cylinder 40 is preferably designed to remove warranty seal 21 by inserting itself into warranty seal 21 and removing it from, for example, assembly path 7 a.

Therefore, the hollow cylinder 40 preferably has dimensions compatible with the warranty seal 21.

Locking member 400 preferably also includes a piston 41.

The piston 41 extends along a longitudinal axis 1 a. In particular, the piston 41 is arranged within at least a portion of the hollow cylinder 40, so that the hollow cylinder 40 is concentric and slides along the main axis 1a with respect to the piston 41 and vice versa.

Furthermore, it is designed for pushing a portion of the cover 2 along the main axis 1 a. Specifically, the piston 41 defines a second plane 4 b.

The second plane 4b is preferably perpendicular to the main axis 1 a.

Therefore, the second plane 4b may also be parallel to the mounting plane 7 b. Furthermore, when the piston 41 and the hollow cylinder 40 are in the locking position, the second plane 4b lies coplanar with the first plane 4 a.

On the other hand, when the piston 41 pushes the closure housing 20 away from the hollow cylinder 40 and the locking element 400 is in or is about to reach the rest position, the

planes

4a, 4b are spaced apart from each other and the second plane 4b protrudes towards the gripping member 3.

The deforming member 4 further comprises a deforming ring 42.

The deformable ring 42 is preferably mounted so that it can slide around the locking member 400. Furthermore, the deformable ring 42 is mounted so that it can slide along the main shaft 1a and move with respect to the locking element 400, in particular along said main shaft 1 a.

Thus, with respect to the locking element 400, the deformation ring 42 defines at least one retaining position, in which said deformation ring 42 and the gripping members 3 are at a first predetermined distance, and a bent position, in which the deformation ring 42 and the gripping members 3 are at a second predetermined distance, smaller than the first predetermined distance.

Advantageously, when the deformable ring 42 is in the bent position and said locking element 400 is in the locking position, the deformable ring 42 is configured and shaped to abut against the outer wall of the peripheral edge 2a of the closure casing 20.

Therefore, the peripheral edge 2a of the closure housing 20 is plastically deformed when pressure is applied only to the outside of the peripheral edge 2a of the closure housing 20.

Specifically, the deformable ring 42 is configured to cooperate with the locking member 400 to draw the locking member 400 from the rest position to the locked position as the deformable ring 42 moves along a predetermined stretch from the rest position to the flexed position.

Specifically, the locked position is reached before the deformation ring 42 reaches the bent position.

More specifically, the deformation ring 42 moves smoothly on the hollow cylinder 40.

The deformable ring 42 preferably cooperates with the hollow cylinder 40 such that when the bending is completed, the deformable ring 42 pulls the hollow cylinder 40 from the locked position to the rest position as the deformable ring 42 moves from the bent position to the retaining position.

The deformer ring 42 begins to drag the hollow cylinder 40, then after the deformer ring 42 has traveled the first predetermined stretch without any dragging. The rest position and the holding position are preferably reached simultaneously by dragging.

To define the dragging, the deformation ring 42 comprises teeth 42 a. Therefore, the tooth 42a is preferably mounted so as to be able to slide within the seat 40 a. The seat 40a preferably defines a predetermined stretch with its own stroke.

Furthermore, the seat 40a preferably extends along the main shaft 1a and is formed on the hollow cylinder 40.

The latter cooperates with the hollow cylinder 40 as far as the movement of the piston 41 is concerned, so that when the hollow cylinder 40 is moved from the locking position to the rest position under the dragging of the deformable ring 42, as described above, the piston 41 remains in the locking position inside the closure housing 20 for a predetermined time until the hollow cylinder 40 is removed from the closure housing 20.

Thus, the piston 41 can exert its repulsive force on the cap 2, ensuring that the cap is retained on the gripping member 3.

The movement of the various components can be performed freely, as well as opposite or opposite to the opposing elements.

In particular, when in said bent position, the deformable ring 42 preferably acts in opposition to the first elastic means 43.

This means that when the deformation ring 42 exerts a thrust force on the peripheral edge 2a, the thrust force also depends on the stiffness of the first elastic means 43 employed in the deformation member 4.

Similarly, the assembly 1, in particular the deformation member 4 of the bending device, also comprises second elastic means 44.

When the hollow cylinder 40 has been in the rest position, the second elastic means 44 preferably cooperate with the piston 41 to bring it from the locking position to the rest position.

Basically, the second elastic means 44 exert a return force which tends to restore the initial configuration of the locking element 400, in which the first plane 4a and the second plane 4b are coplanar.

Thus, the first and second elastic means 43, 44 may comprise various opposing means. They preferably comprise respective springs mounted around the piston 41.

Thus, the gripping member 3 and the deforming member 4 are substantially preferably aligned along the main axis 1 a.

In this respect, the assembly 1 may comprise coupling means 5.

The coupling means 5 are configured to mechanically connect at least a part of the clamping member 3 and a part of the deformation member 4.

In particular, they define a C-shape, also known as a swan neck.

Thus, the coupling device 5 connects the

members

3, 4 such that they are always aligned with the main shaft 1 a.

In particular, when the bending means are included in the device 10, as previously described, the main axis 1a is perpendicular to the assembly plane 7b, and therefore the coupling means 5 preferably define a C-shape along a plane perpendicular to the assembly path 7 a.

Furthermore, the coupling means 5 preferably comprise at least two positioning holes 50.

The locating holes 50 are suitably arranged at the ends of the C-shape.

They are preferably designed to accommodate at least a part of the gripping member 3 and a part of the deformation member 4, respectively. In this way, the

members

3, 4 may remain relatively locked.

Specifically, the positioning hole 50 is preferably centered along the main axis 1 a.

Thus, the positioning hole 50 defines an end of the guide 51.

The guide 51 is essentially a preferred trajectory defined by the positioning hole 50, within which positioning hole 50 the cap 2 being processed is passed through by the

members

3, 4. Thus, the guide 51 substantially defines the aligned portions of the

members

3, 4.

The machining guide 51 is preferably also appropriately centered along the main shaft 1 a.

Therefore, when the closure housing 20 and the warranty seal 21 are arranged within the guide 51, coupling can be performed.

In addition to what has been described, the bending device of the assembly 1 also comprises an auxiliary member 6.

The auxiliary component 6 is preferably essentially an additional processing element of the

components

3, 4 and can process the

components

3, 4 together or alternately.

The auxiliary member 6 also preferably defines a direction of movement 6 a.

The direction of movement 6a is essentially the direction in which the auxiliary member 6 can be moved in order to machine the cover 2 or the cover part 2 through the bending device.

The direction of movement 6a is preferably incident on the main axis 1 a. More suitably, the direction of movement 6a is perpendicular to the main axis 1 a.

If the bending device is part of the apparatus 10, the direction of movement 6a is preferably parallel or aligned with the assembly plane 7 b. Furthermore, it is preferably incident on a suitably vertical assembly path 7 a.

The auxiliary member 6 is thus designed to move in the direction of movement 6a to interact with the cover 2 or a component of the cover 2, preferably the closure housing 20. In particular, the auxiliary member 6 interacts with the closed housing 20 inside the guide 51, preferably for a predetermined time interval.

In this respect, for example, the auxiliary member 6 may comprise a clamp designed for locking the cover 2 or parts thereof in a predetermined position on the holding member 3 using friction. In particular, the gripping member 6 is designed to arrange the closure housing 20 on the support plane 3a of the first portion 30, in a central position with respect to the main shaft 1 a. In this case, the auxiliary member 6 is basically a means for positioning the cover 2 in the guide 51 so as to enable correct machining by means of the

members

3, 4.

The auxiliary member 6 may then be arranged at the free end of the device 1 or partly enclosed in the coupling device 5.

The coupling device 5 preferably comprises a through cavity 52.

The through cavity 52 preferably extends along the direction of movement 6a within the coupling device 5 and is designed to accommodate at least a portion of the auxiliary member 6.

Thus, the through cavity 52 operates like a slot in which the auxiliary member 6 can move forward or backward.

The invention also includes a new method for bending the cover. Of course, the method is implemented using the assembly 1 as described above.

Thus, the method comprises at least one preparation step, one ligation step and one activation step.

In the preparation step, the component 1 is prepared. Thus, in detail, in a preparation step, a lid 2 is prepared, the lid 2 having a closure housing 20, the closure housing 20 having a base and a cylindrical wall provided with a peripheral edge 2a, on the inner wall of which peripheral edge 2a warranty seal 21 can be accommodated, as well as a bending device as described above.

In the connecting step, the closure housing 20 is then firmly connected to the clamping member 3.

In the activation step, the deformation ring 42 is activated from the retaining position to the bent position, preferably by abutting against the outer wall of the peripheral edge 2a of the closure housing 20, so that the peripheral edge 2a of the closure housing 20 is plastically deformed when pressure is applied only to the outer wall of the peripheral edge 2a of the closure housing 20.

Furthermore, during the activation step, the locking element 400 is preferably in contact with the base of the closure housing 20 before the deformation ring abuts against the closure housing 20.

The bending assembly of the cover 1 according to the invention has important advantages.

In fact, the bending device of assembly 1 enables coupling between closure shell 20 and warranty seal 21 by performing a single translational movement, without using a spindle rotatable about main axis 1 a.

Furthermore, the configuration of the gripping member 3 additionally ensures the efficiency of the deformation, which makes it possible to significantly increase the processing speed within the apparatus 10.

A further advantage of the assembly 1, in particular of the bending device, is therefore that it can be synchronized more easily and permanently with the supply lines of the cover and cover parts in order to connect the warranty seal 21 with the closure housing 20.

In summary, another advantage is that the bending device of the assembly 1 is safe, firmly fixing the cover 2 partially inside the guide 51.

The invention may be varied within the scope of the inventive idea defined in the claims. In this context, all details may be replaced with equivalent elements, and the materials, shapes and dimensions may be any.

Claims

1. A bending assembly (1) for lids, comprising:

-a lid (2) having a closure housing (20) with a base and a cylindrical wall, on which a peripheral edge (2a) is provided, the inner wall of the peripheral edge (2a) being able to receive a warranty seal (21), and

-a bending device comprising:

-a clamping member (3) designed for firmly connecting the closure housing (20),

-a deformation member (4) comprising a locking element (400) and a deformation ring (42), the deformation ring (42) being mounted so as to be slidable around said locking element (400),

-the gripping member (3) and the locking element (400) are mutually movable along a shared main axis (1a) between a rest position, in which the locking element (400) is moved away from the gripping member (3), and a locking position, in which the locking element (400) passes through the closure housing (20) when the closure housing (20) is attached by the gripping member (3);

-the deformation ring (42) is mounted so that it can slide along the main shaft (1a) and is moved with respect to the locking element (400) between a retaining position and a bending position, wherein in the retaining position the deformation ring (42) and the clamping member (3)) are at a first predetermined distance, and wherein in the bending position the deformation ring (42) and the clamping member (3) are at a second predetermined distance smaller than the first predetermined distance,

the assembly (1) being characterized in that

-when said deformation ring (42) is in said bent position and said locking element (400) is in said locking position, said deformation ring (42) is configured and shaped to abut against an outer wall of said peripheral edge (2a) of said closure housing (20) so as to plastically deform said peripheral edge (2a) of said closure housing (20) by pressure exerted only on said outer portion of said peripheral edge (2a) of said closure housing (20).

2. Assembly (1) according to claim 1, wherein said gripping member (3) comprises at least a first portion (30) and a second portion (31), said first portion (30) and second portion (31) being mutually movable along said main axis (1a) so as to lock said closure housing (20).

3. Assembly (1) according to the preceding claim, wherein the first portion (30) defines a support plane (3a) perpendicular to the main axis (1a), the second portion (31) defines a machining plane (3b) perpendicular to the main axis (1a), and completely surrounds the first portion (30) in such a way that said planes (3a, 3b) form, when the planes (3a, 3b) are spaced apart, at least one machining seat (32) being created, wherein the closure housing (20) lies on the support plane (3a) and the peripheral edge (2a) at least partially surrounds the closure housing (20).

4. Assembly (1) according to the preceding claim, wherein the first portion (30) is a cylinder centred along the main axis (1a), the second portion (31) is a hollow cylinder concentric with the first portion (30), the machining seat (32) being of opposite shape to at least a portion of the closure housing (20).

5. Assembly (1) according to at least one of the preceding claims, wherein the deformation ring (42) cooperates with the locking element (400) so as to drag the locking element (400) from the rest position to the locking position when the deformation ring (42) is moved from the rest position to the bent position along a predetermined stretch, the locking position being reached before the deformation ring (42) reaches the bent position.

6. Assembly (1) according to at least one of the preceding claims, wherein the deformation ring (42) acts counter to a first elastic means (43) when in the bent position.

7. Assembly (1) according to at least one of the preceding claims, wherein the locking element (400) comprises a piston (41) extending along the main axis (1a) and a hollow cylinder (40) concentric with respect to the piston (41) and sliding along the main axis (1 a).

8. Assembly (1) according to the preceding claim, wherein said deformation ring (42) comprises teeth (42a), said teeth (42a) being mounted in seats (40a) extending along said main shaft (1a) and being formed on said hollow cylindrical body (40).

9. Assembly (1) according to claim 7 or 8, wherein, when the deformation ring (42) is moved from the bending position to the retaining position, the deformation ring (42) cooperates with the hollow cylinder (40) so as to drag the hollow cylinder (40) from the locking position to the rest position at the end of bending, the deformation ring (42) having travelled a first pretension without any dragging and starting to drag the hollow cylinder (40) while reaching the rest position and the retaining position.

10. Assembly (1) according to the preceding claim, wherein the piston (41) cooperates with the hollow cylinder (40) so that when the hollow cylinder (40) is moved from the locking position to the rest position under the dragging of the deformation ring (42), the piston (41) remains in the locking position inside the closed casing (20) for a predetermined time and until the hollow cylinder (40) has been removed from the closed casing (20).

11. Assembly (1) according to the preceding claim, comprising second elastic means (44), which second elastic means (44) cooperate with the piston (41) to bring it from the locking position to the rest position when the hollow cylinder (40) has been in the rest position.

12. Assembly (1) according to the preceding claim, wherein said first and second elastic means (43, 44) comprise respective springs mounted around said piston (41).

13. Assembly (1) according to any one of claims 7 to 12, wherein the piston (41) has an abutment head lying on the second plane (4b) and the hollow cylinder (40) has a lower annular edge lying on the first plane (4a), the first and second planes lying coplanar at least when the piston (41) and the hollow cylinder (40) are in the locking position.

14. Assembly (1) according to at least one of the preceding claims, comprising an auxiliary member (6) defining a movement direction (6a) incident with the main shaft (1a) and designed to interact with the cover (2) for a predetermined time interval, the auxiliary member (6) comprising at least one clamp designed to lock the cover (2) in a predetermined position on the gripping member (3) using friction.

15. A cap tooling device (10) comprising at least a part of an assembly line (7) for said caps (2), said caps (2) defining an assembly path (7a) and an assembly plane (7b) comprising said assembly path (7a) and at least one device (1) according to at least one of the preceding claims, said device (1) being arranged on said assembly plane (7b) in such a way that said main axis (1a) is perpendicular to said assembly plane (7 b).

16. A method of bending a cover comprising the steps of:

-preparing a lid (2) having a closure housing (20), said closure housing (20) having a base and a cylindrical wall with a peripheral edge (2a) on the inner wall of which peripheral edge (2a) a warranty seal (21) can be accommodated, and

-preparing a bending device according to any of the preceding claims;

-firmly connecting the closure housing (20) with the clamping member (3),

-activating the deformation ring (42) from the retaining position to the bent position by abutting against the outer wall of the peripheral edge (2a) of the closure housing (20) so that the peripheral edge (2a) of the closure housing (20) is plastically deformed when pressure is exerted on the outer wall of the peripheral edge (2a) of the closure housing (20), the locking element (400) being in contact with the seat of the closure housing (20) before the deformation ring abuts against the closure housing (20).