EP2396233B9 - Cover for opening and closing cans - Google Patents

Description

The invention relates to a lid for opening and closing cans, in particular beverage cans.

Can lids with drinking port systems are well known in the art. Today's beverage cans usually have a stay-on tab in which a marked by a scribe line oval portion of the lid is pressed with a riveted metal tab in the form of a ring inside the can. This drinking opening system has the disadvantage that, once it has been opened, it can not be closed again.

One way to attach a resealable lid, this would be to connect to the upper edge of the can. Such an embodiment is for example in the DE 69809567 T2 described. However, the upper edge of the can is fixed in the filling process. This leads to the following problems: The product spills over during the attachment of the cover, the spilled liquid must be removed, a second cover must be attached as soon as possible, in order to not have to accept losses in the filling speed and thus higher costs. The attachment to the upper edge of the can is also difficult because the tolerance values are not sufficiently low and between two covers can be up to 0.3 mm difference. An attachment to the top edge of the can would also result in changes in packaging and transportability due to a changed stack height. This would lead to higher planning change costs for fewer products per volume.

In the DE 196 43 487 A1 is a resealable container, in particular a beverage can, disclosed with an at least two-part container lid, wherein a fixedly connected to the container body first lid member and a rotatable about the central axis of the can, second lid member is provided. At its periphery, the second lid member is positively, but rotatably guided on the first lid member. In the resealed Condition, the first and the second cover element extend substantially horizontally and parallel to each other.

DE 1 966 305 U discloses a dispenser made of plastic for handgrip container with the generic features of claim 1, in which a ring flange protrudes from a rotatable upper lid part, which carries circumferential ribs as latching and locking means. The annular flange is on the top of a screen plate, a corresponding annular groove opposite, so that the upper lid part and the screen plate snap together when compressed. The upper cover part and the screen plate in this case run in the region of the scattering openings, both in their open and their closed state, in a straight line parallel to each other.

The aim of the present invention is to further improve known hydration opening systems.

The main objective of the present invention is to consider as much as possible all of today's production standards and criteria. In particular, a high cost efficiency followed by a pronounced product demarcation is sought. The fewer changes to the current standards are needed, the greater the savings potential. Therefore, it is expedient to concentrate all changes at one point of the production line (either in the production or in the filling station). The better approach is provided by the production step, as it is less frequent and better able to implement changes due to existing technical resources.

In the present invention, therefore, the filling step as a possible improvement approach is completely excluded. An exception to this would be an "add-on" design feature that is not functional and is only optional for the customer.

This object of improving existing drinking opening systems solves a lid for opening and closing cans according to claim 1, in particular beverage cans, wherein it has an upper circular cover part and a lower cover part and by movement of the cover parts relative to each other at least one through opening can be achieved by both cover parts, which is closed by movement of the cover parts relative to each other again. So it is possible not only to open the opened can, but also to close it again safely.

It is particularly advantageous that the upper lid part is fixed on the inner surface of the lower lid part. Such an attachment of the Trinkver conclusion closing system not on the outer edge of the lower lid part, but on the inner surface has the advantage that the lid can be made completely in an upstream step and then only in one step after filling with the can body must be connected ,

The lower lid part has at least one opening. This can already exist or only be created by the movement of the cover parts to each other. For example, one opening may be provided for the outflow of the liquid and another for ventilation.

The opening and closing movement of the lid parts relative to one another is produced by the fact that the upper lid part is rotatably mounted on the lower lid part.

A joint is created on the lower cover part. This is used to attach the upper cover part. For the purpose of a rotatable mounting, the lower lid part on its surface a circular movement groove, wherein the radius of the groove is smaller than the radius of the lower lid part and the upper lid part has a spring which engages positively and non-positively in the mounting groove.

The invention makes use of known from the prior art folding mechanisms for can lids back. A way to bend a such a fugue is in the WO 01/89737 A1 and US 6,428,261 described. Here is described how in a can lid a security fold can be bent in several steps. Other methods known to those skilled in the art can be used to bend the fold.

In addition, there are other well known in the art ways, as well as turn flanging and roll bending, which can be used to make the mounting joint on the lower lid. By placing this attachment joint within the lower lid, it is possible to separate the critical features of the filling design from the lid production. Due to the extra production of the mounting joint, it is also possible to design the connection with the upper lid functionally by a hook, and it is not bound to the results of edge beading.

By positioning on the lower lid part of the upper lid part is protected by the upper outer edge of the can from damage that could result from falling down. The upper lid part is below the edge of the can and is therefore not exposed. By attaching the upper lid part on the lower lid part in a mounting joint with a radius within the outer edge of the cans less material is required for the upper lid part. This makes the present invention comparable to comparable stay-on-tab versions in terms of weight.

In addition to the material and cost savings, further improvements due to system compatibility are possible. It is possible to mechanically classify the lids and connect them to the lower lid part at current production speeds. This is by using the identical technology and the same process as it is already used today in the standard Stay-on-Tab technology to attach the loop, or the ring. The current design of the lower lid lifts is similar to the "anti rotation tip" used to classify the stay-on tab for the ring. The upper lid part would be fastened in the same step where the ring or loop is placed in the Stay-on-Tab system.

The standard folding technology used for the loop or ring can also be used to form the bends of the upper lid part. These bends also serve to reinforce the lid to compensate for the lack of material on the sides and also as a mechanism for opening the closure.

The folded structure of the upper lid portion also has the following advantages with respect to overflowed liquid: the folded shape of the surface of the lower lid portion is easily accessible and easy to clean from overflowed liquid at the filling station. Also, a liquid condensation after pasteurization can dry well.

It is advantageous if the lower lid part has an elevation which cooperates with a corresponding configuration of the upper lid part. This can have any shapes, for example in the form of a cylinder or a pyramid. The upper lid part can either have a corresponding elevation or a recess corresponding in shape. As a result, a storage of the lid parts is achieved. In addition, the elements can also act as a spacer between the lid parts.

The upper lid part may be made of aluminum. However, the use of tinplate or plastic is conceivable.

In a plastic version, it is possible to remove the top easily and to supply the plastic to the recycling process. Since the lower lid part is larger than the upper lid part made of plastic, the product continues to flow over the lower lid and keeps the liquid cold and separated from the upper lid. Also, in the case of using a plastic version, therefore, the drinking feeling of the attachment to a "cold box" is not lost because the edge of the can is still attached to the mouth.

It is also possible to use tinplate, since at the top of the lid no open metalene comes in contact with the product and could rust and contaminate the product. For the lower lid, it is customary to repaint pressure-molded parts on the Stay-on-Tab tinplate system as additional protection. This is also possible for the opening of the lower lid part, if needed. Tinplate is a particularly suitable material due to its price and the general application advantages in the market. In this case, the smallest standard used material thickness of 0.16 mm would be sufficient. Due to the smaller radius of the upper cover part of this is inherently stiffer, which makes an even smaller material thickness of 0.12 mm in tinplate possible.

According to a further aspect of the invention, the upper lid part may have a recess. This reduces the amount of material to be used for the upper lid part. At the same time, the recess can serve as an opening in the upper. In particular, the upper cover part may have at least one circular segment-shaped recess. Also two circular segment-shaped recesses are conceivable. These can be arranged opposite each other.

The opening inner edge of the lower lid part is angled according to the invention. By bending a seal is made when meshing the upper and lower lid part.

Cumulatively, a seal can be arranged between the lid parts. In this case, a seal is to be understood as meaning any means which is suitable for connecting the two cover parts. In particular, therefore, a coating as a seal is conceivable. Also rubber, plastic or suitable liquid agents such as adhesives and welding are possible.

The seal has to withstand numerous loads such as vibration during transport, pressure changes, changes in the contact area due to thermal expansion due to temperature changes. The production of a sealing ring is therefore very expensive, both in development and in production. Since this can lead to a significantly slower production and therefore can make significantly more expensive, it is desirable to achieve the seal by other means.

Another aspect of the invention provides that the upper and the lower cover part are made of a hybrid composite material with a plastic layer. Advantageously, the plastic layer of the lower lid part comes to rest on that of the upper lid part, between the two lid parts.

By using such a hybrid composite layer material consisting, for example, half plastic and half tinplate or aluminum, it is possible to combine the advantages of different materials in different areas, so that they are reflected positively in the general performance characteristics.

If the plastic side is lying on top of the lower lid and lying down on the upper lid, the two plastic sides have direct contact. The conical opening in the lower cover part forms a good sealing surface contact with the conical projection of the upper cover part. This contact area is later connected by heat or high frequency welding. The welding is focused on the environment of this area and applied only for a short moment after the installation of the second cover. This welded part is later broken by the user by pushing the hood-shaped structure on the upper lid part inwards, thus destroying the welded seal, so that the upper lid part can be rotated. This can also be achieved by a momentary pressure loss, which levels the two lid surfaces and allows easy turning of the upper lid part.

In a plastic version, the seal would be designed as part of the upper lid part. A projection on the upper lid part then has the identical negative shape of the upper part of the opening of the lower lid part. This curvature on the upper cover part connects in a fixed space with the hole on the lower cover part, with which it is welded later, wherein on the inside of a tear line is pressed. The plastic version without seal is opened in the same way as the version with seal.

With regard to the opening and closing options, it is conceivable to integrate a snap lock in the upper lid of the metal version. For this purpose, it is conceivable to provide a curvature in the middle of the upper lid, so that the folded-up side of the upper lid snaps down and thereby closes the can, but not sealed. To seal the can, in this closed position, the folded side members are then pushed inward and the lid snaps into a sealed position. When the lid is reopened, the buckle snaps over and snaps into the open position.

• Figur 1 eine dreidimensionale Darstellung des Deckels aus Aluminium,
• Figur 2 eine dreidimensionale Darstellung des Deckels aus Plastik,
• Figur 3 einen Schnitt durch einen unteren Deckelteil unter Markierung der Befestigungsfuge,
• Figur 4 einen Schnitt durch den unteren Deckelteil mit Markierung der Erhöhungen,
• Figur 5 einen Schnitt durch einen unteren Deckelteil unter Markierung des Öffnungsbereichs,
• Figur 6 einen Schnitt durch einen unteren Deckelteil unter Markierung der Schnittkante an der Öffnung,
• Figur 7 den Haken eines oberen Deckelteils aus Aluminium,
• Figur 8 Soll-Dehn-Stellen eines oberen Deckelteils eines Aluminiumdeckels,
• Figur 9 den Mittelbereich eines Aluminiumdeckels ohne den erfindungsgemäßen Konus,
• Figur 10 einen Schnitt durch einen Atuminiumdeckel ohne den erfindungsgemäßen Konus unter Markierung des Offnungsbereichs,
• Figur 11 eine dreidimensionale Darstellung eines unteren Deckelteils,
• Figur 12 eine dreidimensionale Darstellung eines oberen Deckelteils aus Aluminium ohne den erfindungsgemäßen Konus,
• Figur 13 Darstellungen möglicher Ausgestaltungen der Verbindungsstelle zwischen oberem Deckelteil und unterem Deckelteil,
• Figur 14 eine Darstellung möglicher erfindungsgemäßer Ausgestaltungen des Abdichtmechanismus zwischen oberem Deckelteil und unterem Deckelteil an der Trinköffnung,
• Figur 15 eine Darstellung möglicher Ausgestaltungen der Führung von oberem Deckelteil zu unterem Deckelteil,
• Figur 16 Darstellungen der verschiedenen Verschlussvarianten jeweils in geöffneter und geschlossener Position.

The invention will be explained in more detail with reference to some embodiments with reference to the drawings. Show here

• FIG. 1 a three-dimensional representation of the lid made of aluminum,
• FIG. 2 a three-dimensional representation of the lid made of plastic,
• FIG. 3 a section through a lower lid part under marking the mounting joint,
• FIG. 4 a section through the lower lid part with marking of the elevations,
• FIG. 5 a section through a lower lid part, marking the opening area,
• FIG. 6 a section through a lower lid part, marking the cut edge at the opening,
• FIG. 7 the hook of an upper lid part made of aluminum,
• FIG. 8 Desired elongation points of an upper lid part of an aluminum lid,
• FIG. 9 the central region of an aluminum cover without the cone according to the invention,
• FIG. 10 a section through an atuminium cover without the cone according to the invention with marking of the opening region,
• FIG. 11 a three-dimensional representation of a lower lid part,
• FIG. 12 a three-dimensional representation of an upper lid part made of aluminum without the cone according to the invention,
• FIG. 13 Representations of possible embodiments of the connection point between upper lid part and lower lid part,
• FIG. 14 an illustration of possible inventive embodiments of the sealing mechanism between the upper lid part and the lower lid part at the drinking opening,
• FIG. 15 an illustration of possible embodiments of the guide from upper lid part to lower lid part,
• FIG. 16 Representations of the different closure variants in each open and closed position.

The lid 1 made of aluminum in FIG. 1 consists of a lower lid part 2 and an upper lid part 3.

FIG. 2 shows a partially constructed of plastic cover 21 with a lower cover part 22 made of aluminum and an upper cover part 23 made of plastic.

In FIG. 3 the lower lid part 2 is shown, wherein the fastening joint 4 is marked.

By using the so-called "safety fold-end" technology or other folding techniques known to those skilled in the art, it is possible to move the attachment joint 4 for the upper lid part (not shown) from the outer edge of the can inside. This has the advantage that it is no longer necessary to intervene in the filling process, since the second cover part (not shown here) can already be mounted in the production step. The assembly of the second lid part is similar to the steps necessary to connect the ring to the lid in stay-on-tab closures.

In FIG. 4 is highlighted in the lower lid part, the increase 8 for storage.

The elevation 8, which points upwards, allows a better adjustment of the lid. It could be further used as an orientation aid for the lower lid part 2, if it has to be aligned.

When lower cover part 2 in FIG. 5 the opening area is marked to the opening 5. An angled wing 9 located there allows a larger sealing surface in a smaller space, in which he uses the vertical length. This design allows possible pressure loss due to thermal expansion differences of the material, for example when using aluminum and plastic to minimize. An angled surface also provides more sealing surface and serves as an inner ring to increase the sealing effect.

When lower cover part 2 in FIG. 6 the cutting edge 10 is marked at the opening 5. A flattened cut at this cutting edge 10 allowed keeping a seal in place by providing resistance when the seal is pressed. This prevents the seal from slipping down. The flattened section 10 also allows an exact size adjustment, which is necessary for the good fit of the seal.

At the in FIG. 7 illustrated embodiment of the upper lid portion 3 made of aluminum, it is possible to construct the hook 11 functionally adapted, since the mounting options no longer need to be adapted to the shape of the rim of the can rim after attachment of the lid. This is especially true if the surface of the hook 11 is reduced, as suggested in the present invention.

It is also possible to provide the upper lid part with a double hook to reinforce the attachment of the second lid part. In this case, a second mounting groove could be attached to the top of the lower lid part for this second hook. Also, a triple spring in the upper cover part is conceivable to further strengthen the attachment of the second cover part. These and other construction variants are described below in FIG. 13 shown in detail.

The upper lid part 3 in FIG. 8 Aluminum may have cuts 12 at certain locations to remove excessive stiffness that may prevent the top lid portion 3 from fitting successfully with the bottom lid. In this case, the cuts 12 can be arranged such that the relaxation acts only in one direction to prevent the upper lid part 3 from becoming unhooked.

The upper cover part 3 made of aluminum ( FIG. 9 ) has in the marked center region 13 a rounded part, which allows the upper lid part 3, slightly above the elevation 8 (see. FIG. 4 ) to slide.

The in FIG. 10 shown upper cover part 3 is an aluminum version. This is provided at the elevation 7 with cuts 14. These cuts 14 form a pliers shape, which later engages in a grooved flap on a gasket. This would be connected during assembly of the cover in the production of the upper lid part 3. To be later opened by the user, the hood 7 is pushed inwards, resulting in opening of the seal along an intended tear line.

The in FIG. 11 shown lower cover part 2 is for both the aluminum version of the lid 1 and for the plastic version of the lid 21 (see. Figures 1 and 2 ) usable. This has the attachment joint 4, the drinking opening 5 and two elevations 8 'and 8 "for storage of the upper lid part.

The in FIG. 12 shown upper cover part 3 made of aluminum can on the in FIG. 11 shown lower cover part 2 is placed and then rotated on the lower lid part 3 after breaking the seal. For this purpose, offer the wings 15 and 15 'a Griffftäche.

The upper lid part can be designed in one piece. He would be locked in the filling station in the seal and fixed there until it is torn open by turning. This also serves as a "tamper proof" mechanism. This version can be used with both materials, plastic and aluminum.

In another version, the "break-open design", the functional location is located directly above the location that is to be opened. Here, the functional location of the lid, which is mounted over the seal, is a separate part from the lid. This part is small compared to the proportions of the opening. The mold is pushed inward to break the seal, the seal snaps into the part and the part snaps into a lower recess in the cover.

A further embodiment has a curvature over the opening, wherein the material is so thin that the curvature can be pressed in with the thumb. This will seal with the insertion holes in the Vault connected. The impression of the vault opens the seal and serves as a "tamper proof". This construction variant can also be used with both materials, plastic and aluminum.

The can lid 51 in FIG. 13a / b consists of a lower lid portion 52 and an upper lid portion 53. The lower lid portion 52 has a Befestigungsfuge 54, in which a hook 55 of the upper lid portion 53 engages. The hook 55 of the upper lid member 53 is folded to increase the stability. Also, the rotation of the hook 55 in the joint 54 is improved.

The can lid 61 in FIG. 13c again consists of a lower lid portion 62 and an upper lid portion 63. This time, however, in addition to the first hook 64, a second hook 65 is provided on the upper lid portion 63 to secure the upper lid portion 63 better. The bend on the outer edge 66 allows more flexible movement in this area. This may be helpful since this area is stiffer because of the proximity to other structures on top lid portion 63.

In the construction variant of a can lid 71 in FIG. 13d For example, the upper lid member 73 has a side recess 75 adjacent to the hook 74, which is in contact with the attachment groove 76 of the lower lid member 72 so as to prevent the upper lid member 73 from slipping sideways. In addition, the upper lid portion 73 has a groove 77 which provides another fastening point of attachment. This cooperates with a further groove 78 on the lower cover part 72. The grooves 77 and 78 serve as a guide rail for attachment and lifting of the upper lid member 73 when they are not fully applied continuously.

At the in Figure 14a illustrated variant of a can lid 141 according to the invention, the lower lid portion 142 an opening 143, the edges 144 are folded inwards. These rounded edges 144 form with a cone 145 on the upper cover part close contact, whereby a seal is achieved. The seal is broken when the upper lid member 146 is rotated. Until opened by the user, the edge resting on the cone forms a complete seal.

In the construction variant of a can lid 151 in FIG. 14b For example, the lower lid portion 152 has an opening 153 with the rim 154 folded upwardly. This may be advantageous to prevent the liquid in the can from coming into contact with an open cut edge of the metal. Together with the tight sealing seat of the cone 155 of the upper lid portion 156, a gas-tight seal is achieved until breakage.

In the body variant 161 in FIG. 14c For example, the lower lid portion 162 has a fold 163 to increase the rigidity of this area and, at the same time, the sealing surface. Sealing can be achieved by the use of a conventional plastic composite layer which is bonded in the contact area by heat or high frequency welding.

A double fold 173 on the lower lid part 172 forms with a double cone 174 in the upper lid part 175 an expansion of the sealing surface (cf. Figure 14d ).

Is in variant 181 of the fold 183 off Figure 14e mounted below the surface of the lower lid portion 182, a larger clearance when turning and lifting the upper lid portion 184 is ensured.

In the in FIG. 14f Dargesteilten variant 191, the lower lid portion 192 has an opening 193 with a groove 194. In this, a seal 195 can be arranged. Another bead 196 prevents slippage or slippage of the seal 195.

Is the can lid 201 in Figure 14g a separation of the lower lid portion 202 and the upper lid portion 203 by an increase in the center (not shown) is reached, the distance between the two lid portions 202 and 203 to each other outwardly decreases with the radius. additionally Also, the pressure on the lid, when closed, decreases with the radius starting from the center (ie, the pressure in the middle is higher than the sides). The asymmetrical shape of the cone 204 and the fold 205 here compensates.

In the construction variant of a can lid 211 in Figure 14h The lower lid part 212 remains covered with the original surface of the lid. It is partly truncated, but not complete, so that material stops to serve as a hinge for the broken material. The break may be either a tear line 213 or a seal 214 protected by a seal, breaking the seal once it has been opened.

The lid 211 is opened by turning the upper lid part 215 over the elevation 216, pushing the rounded edge 217 on the upper lid part up and over the elevation 216, pushing it downwards and breaking the seal.

Once the connector has been broken by turning the upper lid member 215 to the closed position, the piece will swing even further back as the second elevation 218 cooperates with the side surface of the cone 219 of the upper lid member 215 (see the position of the lid 211 in FIG Figure 14i ).

As in FIG. 15 shown, there are various construction variants for guiding the upper on the lower cover part. This shows the FIG. 15a a three-dimensional representation of the lower lid portion 272 and the upper lid portion 273. These are composed as a lid 271 in cross section in FIG. 15b to see. The lower lid portion 272 has a single upwardly projecting ramp 274 located at the center of the lower lid portion 272. When the upper lid portion 273 is rotated, the ramp 274 pushes against the corner 275 of the upper lid portion 273 and lifts it upwards. A 180 ° rotation brings the lid parts 273 and 272 back to the starting position.

In the body variant 281 in the FIGS. 15c and 15d For example, the lower lid portion 282 has at least one ramp 283 facing upward and attached to the outer periphery of the lid. The upper lid portion 284, however, has a ramp 285 facing down. When the upper cover part 284 is rotated on the lower lid part, the two intermediate ridges meet and the lids are separated from each other. The fold 286 of the upper lid portion 284 prevents permanent damage by lifting and facilitates lifting in this area.

In the body variant 291 in the FIGS. 15e and 15f the lower lid part 292 again has two ramps 293 and 294. This time configured differently is the upper cover part 295, which has openings 296 and 297 at the corresponding points of the ramps. If the upper lid part 295 is rotated so that the openings no longer come to rest over the ramps, the two lid parts are separated from each other.

The in the Figures 15g and 15h illustrated embodiment 301 has two ramps 303 and 304 in the lower lid part 302. These push against the open side 306 of the upper lid portion 305 when it is rotated, and lift the two lid parts apart.

In the body variant, the in FIG. 15i is shown, the lower lid portion 312 on a three-sided increase 313 on. The upper cover part 317 has a smaller opening 314, a larger opening 315 and a closed cap 316, and also an elevation 318. By means of the three-sided elevations 313, 318, each of these functional elements can thus be brought into coincidence by turning the upper cover part 317 with the opening 319 in the lower cover part 312.

In the non-inventive design variant 331 in FIG. 16a (Right after opening, left before), the upper lid portion 334 has a central part which cooperates with the elevation 333 in the lower lid portion 332. When the upper lid part is rotated over the Anheberampen 335, then the increase jumps 336 from convex to concave. When this happens, the two flaps 337 and 337 fold slightly outwardly and hold the upper lid portion 334 upwardly. In this upper position, the can can only be closed, but not sealed. To seal the can, push the two flaps 337 and 337 together to their original position, whereupon the top lid portion 334 snaps into place.

In the body variant 341 in FIG. 16b For example, the cone 347 of the upper lid portion 343 has an asymmetrical shape with a protrusion 344. The cone 347 is welded to the wall 345 by welding a plastic layer of a hybrid plastic and metal laminate material. When the asymmetric elevation 344 is forced from concave to convex, the sealed seal opens and allows gas to escape. Thereby, the upper lid part 343 and the lower lid part 342 are separated from each other so far that the turning of the upper lid part 343 becomes easier.

In the embodiment 361 in the Figures 16c and 16d For example, the lower lid portion 362 has a greatly outwardly bent opening 363. This secures the seal 364. The connection between the cone 365 of the upper cover part 366 and the seal 364 is interrupted when the elevation 367 from the concave position in FIG. 16c in the convex position in FIG. 16d is pressed.

In the construction variant of a can lid 371 in the FIGS. 16e and 16f the lower lid part 372 remains covered with the original surface of the lid. The area underlying the sidewall has a tear line 373 or is partially truncated 374, but not completely severed so that material stops to serve as a hinge for the erupted material. The lid 371 is opened by turning the upper lid part 375 over the elevation 376, pushing the edge 377 on the upper lid part up and over the elevation 376.

In the closed position (cf. FIG. 16f ), the downwardly broken lid piece swings even further back, since the second elevation 378 cooperates with the side surface of the cone 379 of the upper lid portion 375.

In the construction variant of a lid 401 (see. Figures 16g and 16h ), the lower lid part 402 has an inwardly bent edge 403. The upper lid portion 403 in turn has an inverted cone 404 which is slightly larger than the inner edge of the opening 405. Due to the larger circumference, the upper lid part 403 snaps in and the can is tightly closed. By using a plastic-metal coating material, the contact of the two metal lid parts can be prevented. The can is made by pushing down the elevation 406 from its concave ( FIG. 16g ) in a convex shape ( FIG. 16h ) open.

Claims (14)

1. A cover for opening and closing cans, particularly beverage cans, comprising a top cover component (3; 53; 63; 73; 146; 156; 175; 184; 203; 215; 273; 284; 295; 305; 317; 334; 343; 366; 375; 403) and a bottom cover component (2; 52; 62; 72; 142; 152; 162; 172; 182; 192; 202; 212; 272; 282; 292; 312; 332; 342; 362; 372; 402), said top cover component rotatably mounted on said bottom cover component, so that by rotation of said top cover component at least one through-hole through said both cover components is created, which can be closed again by rotation of said top cover component; said bottom cover component comprising a circular, radially inwardly extending fastening groove (4; 24; 54; 76) on the top side thereof, wherein the radius of said fastening groove (4; 24; 54; 76) is smaller than the radius of said bottom cover component, and wherein said top cover component comprises a spring hook (11; 31; 55; 64; 74) that is oriented radially inward and is engaged in a form-fitting and force-fitting manner with said fastening groove (4; 24; 54; 76), said spring hook (11; 31; 55; 64; 74) moving within said fastening groove (4; 24; 54; 76) when said top cover component is rotated relative to said bottom cover component, characterized in that the inner edge (144; 163; 173; 183) of the hole through said bottom cover component is angled and said top cover component is provided with a cone (145; 155; 174; 204; 219; 347; 365; 379; 404) acting together sealingly in close contact with said angled inner edge of said bottom cover component when said hole is reclosed.
2. The cover according to claim 1, characterized in that said fastening groove (4; 24; 54; 76) is located below the upper edge of the can which edge is formed by said bottom cover component.
3. The cover according to one of the previous claims, characterized in that said bottom cover component (272) comprises an elevation (274) that is acting together with a corresponding form of said top cover component (273).
4. The cover according to one of the previous claims, characterized in that said bottom cover component and/or said top cover component are made of one or more of the materials aluminum, plastic, and/or sheet metal.
5. The cover according to one of the previous claims, characterized in that said top cover component comprises an open recess.
6. The cover according to one of the previous claims, characterized in that said top cover component (3) comprises at least one open recess designed as a circular segment.
7. The cover according to claim 6, characterized in that said top cover component (3) comprises two opposite open circular segment recesses.
8. The cover according to one of the previous claims, characterized in that said top and bottom cover components form a sealing area in which said bottom cover component (162; 172; 182; 202; 212) presses directly against said top cover component (175; 184; 203; 215).
9. The cover according to one of the previous claims, characterized in that said sealing area is disposed below the cover surface of said bottom cover component (162; 172; 182; 202; 212).
10. The cover according to one of the previous claims, characterized in that said bottom cover component (142; 162; 172; 182) has a surface (144; 163; 173; 183) sloping downwards towards said hole (143).
11. The cover according to one of the previous claims, characterized in that a seal (195; 364) is arranged between said cover components.
12. The cover according to one of the previous claims, characterized in that said top and/or said bottom cover component is/are made from a hybrid laminate material having a plastic layer.
13. The cover according to claim 12, characterized in that when both of said cover components are made from a hybrid laminate material with a plastic layer, the plastic layer of said bottom cover component is lying on the same of said top cover component.
14. A can, particularly a beverage can, comprising a cover according to one of the previous claims.

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