EP2396233A1

EP2396233A1 - Cover for opening and closing cans

Info

Publication number: EP2396233A1
Application number: EP10711827A
Authority: EP
Inventors: Michael Keigan Jensen
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-02-11
Filing date: 2010-02-11
Publication date: 2011-12-21
Anticipated expiration: 2030-02-11
Also published as: EP2396233B1; EP2396233B9; US20150298874A1; US20120273490A1; WO2010091885A1; US9586735B2

Abstract

The invention relates to a cover (1) for opening and closing cans, in particular beverage cans, having a top circular cover component (3) and a bottom cover component (2). By moving the two cover components (2, 3) relative to one another, at least one through-hole can be opened and re-closed by both cover components (2, 3). A highly effective seal is obtained by precise coordination of the form of the top (3) and bottom (2) cover components, which can be increased even further by the additional use of sealing materials such as varnish, rubber, plastic or welded connections.

Description

Lid for opening and closing cans

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

[02] Can lids with drinking opening systems are well known in the prior 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.

[03] One way to attach a resealable lid, this would be to connect to the upper edge of the can. Such an embodiment is described for example in DE 69809567T T2. 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.

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

[05] The main objective of the present invention is to consider as much as possible all current production standards and criteria. In particular, a high cost efficiency followed by a pronounced product demarcation is aimed for. The fewer changes to the current standards are needed, the greater the savings potential. Therefore it is expedient to make all changes in one place of the production line (either in production or in production)

BESTÄTIGUNGSKOPSE 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.

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

[07] According to a first aspect of the invention, the object of improving existing drinking opening systems solves a lid for opening and closing cans, in particular beverage cans, wherein it has an upper circular lid part and a lower lid part and by moving the lid parts relative to each other at least one through opening Both cover parts can be achieved, 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.

[08] It is particularly advantageous if the upper cover part is fastened on the inner surface of the lower cover part. Such attachment of the hydration closure system not on the outer edge of the lower lid part, but on the inner surface has the advantage that the lid can be completely made already in an upstream step and then only in one step after filling must be connected to the can body.

[09] The lower lid part may have at least one opening. This can already exist or only be created by the movement of the lid parts relative to one another. Thus, for example, an opening for the outflow of the liquid and another for ventilation may be provided.

[10] The opening and closing movement of the lid parts relative to each other can be generated by rotatably supporting the upper lid part on the lower lid part. However, a lateral shift is also conceivable.

[11] It is particularly advantageous to produce a joint on the lower cover part and to use this for fastening the upper cover part. In a rotatable mounting of the lower lid part may have 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 / or non-positively in the mounting groove.

[12] The invention uses folding mechanisms for can lids known from the prior art. One possibility for bending such a joint is described in WO 01/897 37 A1. Here is described how in a can lid a security fold can be bent in several steps. Other possibilities for bending such a joint can also be used. Another method is described, for example, in US Utility Model Application 09 / 578,044. Again, it describes how a can lid can be bent in several steps to a safety fold. Other methods known to those skilled in the art can be used to bend the fold.

In addition, there are other known from the prior art possibilities, as well as turning flanging and roll bending, which can be used to produce 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 productions. Due to the extra preparation of the mounting joint, it is also possible to design the connection with the upper lid functionally by a hook and you are 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 box 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.

[15] 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 possible by using the same technology and process as the standard Stay-on-Tab technology is already used today to make the loop, to fix the ring. The current design of the lids on the lower lid is similar to the "anti-rotation tip" used to classify the stay-on Tah for the ring The upper lid part would be attached in the same step in which the ring or the Loop is placed at the stay-on-tab system.

[16] The standard folding technology used for the loop or ring can also be used to shape 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.

[17] The folded structure of the upper lid part also has the following advantages with respect to overflowed liquid: the folded shape makes it easy to reach the surface of the lower lid part and to easily clean it from overflowed liquid at the filling station. Also, a liquid condensation after pasteurization can dry well.

[18] 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.

[19] The upper lid part can be made of aluminum. However, the use of tinplate or plastic is also conceivable.

In a plastic version, it is possible to easily remove the top and so the plastic to recycle process supply. Since the lower lid part is larger than the upper lid part made of plastic, the product continues to flow over the lower lid, keeping 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.

[21] It is still possible to use tinplate, since at the upper part of the lid no open metal end comes into contact with the product and could rust and spoil the product. could. For the lower lid, it is customary to re-coat compression molded parts as additional protection for the Stay-on-Top tinplate system. 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 lid part, this is inherently stiffer, which makes an even thinner diameter of 0.12 mm possible in tinplate.

[22] According to another aspect of the invention, the upper lid part may have a recess. As a result, the amount of material to be used for the upper cover part is reduced. At the same time, the recess can serve as an opening in the upper lid part. 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.

[23] The inside edge of the opening can be angled. This applies both to an opening in the lower lid part and to an opening in the upper lid part. By bending a seal can be made when meshing the upper and lower lid part.

Alternatively or cumulatively, a seal can also be arranged between the cover parts. In this case, a seal is understood to mean any means that 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. In this case, the seal can be designed so that it fits positively into the opening in the lower cover part. Finally, it can also be positively connected to the upper lid part.

[25] The seal has to withstand numerous loads such as vibrations 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 it significantly more expensive, to strive to achieve the seal by other means .. [26] Another aspect of the invention provides that the upper and lower cover parts are made of a hybrid composite material with a plastic layer. Advantageously, the plastic layer of the lower cover part comes to lie on that of the upper cover part, between the two cover parts.

By using such a hybrid composite layer 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.

[28] If the plastic side is placed 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.

[30] With regard to the possibilities of opening and closing, it is conceivable to integrate a snap lock into 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. Around 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.

[31] A further aspect of the invention relates to a method for producing a lid according to the invention, wherein the upper lid and the lower lid are manufactured separately and are connected together in a subsequent step.

Finally, a final aspect of the invention relates to a method for connecting a lid according to the invention to a can base, wherein the prefabricated lid is connected to the can in a subsequent step. As a result, the filling part of the process line is not changed, thus maintaining the current filling speed.

[33] The invention will be explained in more detail below with reference to numerous exemplary embodiments with reference to the drawings. Show here

FIG. 1 shows a three-dimensional representation of the lid made of aluminum,

FIG. 2 shows a three-dimensional representation of the cover made of plastic,

3 shows a section through a lid made of aluminum,

FIG. 4 shows a section through the lower cover part with the fastening joint being marked;

5 shows a section through the lower lid part with marking of the elevations,

FIG. 6 shows a section through a lower cover part, marking the opening area,

7 shows a section through a lower cover part, marking the cut edge at the opening, FIG.

8 shows a section through a lid with an upper lid part made of plastic,

FIG. 9 shows the hook of an upper cover part made of aluminum,

FIG. 10 shows the hook of an upper cover part made of plastic, FIG. 11 set elongation points of an upper cover part of an aluminum cover,

FIG. 12 set expansion points of an upper cover part of a plastic cover, FIG.

FIG. 13 shows the middle region of an aluminum cover,

FIG. 14 shows the middle region of a plastic lid,

FIG. 15 shows a section through an aluminum cover, with the marking of the opening area,

FIG. 16 shows a section through a plastic lid, with the marking of the opening area,

FIG. 17 is a three-dimensional representation of a lower cover part,

FIG. 18 shows a three-dimensional representation of the lid with an upper lid part made of plastic in the unopened state,

FIG. 19 shows a three-dimensional representation of the lid with an upper lid part made of plastic in the unsealed but closed state,

FIG. 20 shows a three-dimensional representation of the lid with an upper lid part made of plastic in the opened state,

FIG. 21 shows a three-dimensional representation of a deck with a top lid part made of plastic in an opened state for recycling,

FIG. 22 shows a three-dimensional representation of an upper cover part made of aluminum,

FIG. 23 shows a three-dimensional representation of a can with an "ad-on" design feature with a two-part upper plastic can lid,

FIG. 24 shows a three-dimensional representation of the outer edge part of the plastic can lid,

FIG. 25 shows a three-dimensional representation of the inner cover part of the plastic can lid,

FIG. 26 shows a three-dimensional representation of a small seal, FIG. 27 shows a three-dimensional representation of a large seal,

FIG. 28 shows a three-dimensional representation of the lower can lid part with opened seals,

FIG. 29 shows a section through a lower cover part made of aluminum with a seal,

FIG. 30 a section through a lower cover part made of aluminum with a seal,

Figure 31 shows possible embodiments of the junction between the top

Cover part and lower cover part,

FIG. 32 shows a representation of possible embodiments of the sealing mechanism between the upper cover part and the lower cover part at the drinking opening,

FIG. 33 a representation of possible embodiments of the guidance of the upper cover part to the lower cover part,

Figure 34 representations of the different closure variants in each case in the open and closed position.

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

Figure 2 shows a lid 21, partially constructed of plastic, with a lower lid part 22 made of aluminum and an upper lid part 23 made of plastic.

FIG. 3 shows a section through the cover 1 made of aluminum from FIG. 1 with the lower cover part 2 and the upper cover part 3. The upper cover part 3 engages in a fixing joint 4 in the lower cover part 2. The opening 5 is present closed by a seal 6. This can be broken by pressure on the increase 7. The upper lid part 3 is rotatably mounted on the elevation 8 in the lower lid part 2.

[37] In Figure 4, the lower lid part 2 is shown, wherein the fastening joint 4 is marked. [38] By using the so-called "safety fold-end" technology or other folding techniques known to those skilled in the art, it is possible to lay the fastening joint 4 for the upper cover part (not shown) from the outer edge of the can inwards 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 installation of the second cover part is similar to the steps that are necessary to Stay -on-tab fasteners to connect the ring with the lid.

[39] In FIG. 5, the elevation 8 for storage is highlighted in the lower lid part.

[40] The elevation 8, which points upwards, allows a better adjustment of the lid. It could be further used as an organizing aid for the lower lid 2 when it needs to be aligned.

[41] In the lower lid 2 in FIG. 6, the opening area to the opening 5 is marked. 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 for 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.

[42] In the case of the lower cover part 2 in FIG. 7, the cut edge 10 is marked on the opening 5. A flattened cut at this cutting edge 10 allows the seal to be held 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.

FIG. 8 shows a cross section through a can lid 21 with a lower lid part 22 made of aluminum and an upper lid part 23 made of plastic. Here, too, the upper lid part 23 engages in a fastening joint 24. In the drinking opening 25, a seal 26 is arranged. Again, a storage is achieved by the increase 28 in the lower lid part. An opening of the seal takes place here, however, by pushing in the T-shaped latching part 27. The upper lid part 23 can be easily removed after use, when the T-shaped latch member 27 is cut off the mounting tab 29 and then pushed out of the guide 30 becomes. It is then possible to compress the upper lid part 23 and thereby unhook it and thereby remove it.

Both in the embodiment of the upper lid part 3 made of aluminum shown in FIG. 9 and in the design of the upper lid part 23 made of plastic shown in FIG. 10, it is possible to construct the hooks 11 and 31 in a functionally adapted way, since the FIGS Mounting options no longer need to be adapted to the shape of the rim of the can edge after attachment of the lid. This is of particular importance when the surface of the hook 11 or 31 is reduced, as proposed in the present invention.

It is also possible to provide the upper lid part with a double hook to strengthen the attachment of the second cover 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 shown in detail in FIG. 31 below.

The upper lid part 3 or 23 in FIG. 11 made of aluminum and in FIG. 12 made of plastic can have cuts 12 or lower-material areas 32 at certain points in order to remove excessive stiffness which can prevent the upper lid part 3 or 32 successfully matches the lower lid. In this case, the cuts 12 or the poorer-material regions 32 can be arranged such that the relaxation acts only in one direction, in order to prevent the upper lid part 3, 23 from becoming unhooked.

The upper lid part 3 or 23 of aluminum (Figure 13) or plastic (Figure 14) has in the marked center region 13 and 33 has a rounded part, the upper lid part 3, 23 allowed, slightly above the increase 8 (see Figure 5) to slip.

[48] The upper lid part 3 shown in Figure 15 is the aluminum version. This is provided at the elevation 7 with cuts 14. These cuts 14 form a tong shape which later engages in a grooved flap on the gasket. As a result, this would be connected during assembly of the lid in the production of the upper lid part 3. To later through the To open the user, the hood 7 is pushed inwards, resulting in opening of the seal along a designated tear line.

[49] Figure 16 shows a variant of the lid 23 made of plastic. It is equipped with a mechanism similar to that on which it engages with the gasket except for the projection made by the gasket of the metal version. This allows the lid to be placed directly on the seal when mounted in the production line. In this case, the upper plastic lid 23 is mounted with the open latch 27 (shown here closed), which makes it possible to bend the lid, thereby simplifying assembly in the production line. If the latch 27 is engaged by the end user as illustrated herein to open the can, the lid will snap up during latching so that the seal is weakened to rupture. Should it not rupture, then this is in any case by turning the upper cover part 23 to accomplish.

The lower lid part 2 shown in Figure 17 can be used both for the aluminum version of the lid 1 and for the plastic version of the lid 21 (see Figures 1 and 2). This has the attachment joint 4 (or 24), the drinking opening 5 and two elevations 8 and 8 "for storage of the upper lid part.

[51] In FIG. 18, an upper cover part 23 made of plastic is placed on the lower cover part 22, so that together they form the cover 21. If the cover 21 is to be opened, the latching part 27 is pressed into the guide 30, so that the seal ruptures. Now, the upper lid part 23 can be rotated on the lower lid part 22, wherein the opening 25, as shown in Figure 20, is exposed. After use of the can, as shown in Figure 21, the latching member 27 are removed after severing the tab 29 and so the upper lid portion 23 are completely detached from the lower lid portion 22.

Likewise, the upper lid part 3 made of aluminum shown in Figure 22 can be placed on the lower lid part 2 shown in Figure 17. Also, this can then be rotated on the lower lid part 3 after breaking the seal. For this purpose, the wings 15 and 15 'provide a gripping surface.

FIG. 23 shows a complete can 40, which is provided with a can body 41 with a two-part upper plastic lid 42. This is an "add-on" An outer plastic ring 43 (see also Fig. 24 for a depiction of deia) is secured to the upper nozzle edge 44 (see Fig. 28), an inner lid portion 45 (see Figs a detail also figure 25), which covers the upper can lid from above, can then be pressed down in the plastic ring 43 about the can edge 44. The inner plastic part 45 snaps into the outer lid edge on its inner side. 47 (see Figures 26 and 27) in the cover part 45 and are permanently connected to it .Also, the seals are simultaneously pierced by a sharp edge around the opening of the cover 48. For this purpose, the seals 46, 47 with a predetermined breaking point Now, you can use the can 40. If it is rotated by 90 °, it opens, it is turned back, closes This design of the lid allows riveting and a clear visual indication once the lid has been opened.

[54] Based on the same latching principle, the upper lid part can be designed in one piece. The upper lid part 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 proofing mechanism. This version can be used with both materials, plastic and aluminum.

[55] In another version, the "break-open design", the functional point is located directly above the point to be opened, where the functional position of the cover, which is located above the seal, is located Part separated from the lid This part is small compared to the proportions of the opening The mold is pushed inwards to break the seal, the seal snaps into the part and the part snaps into a lower recess in the lid.

[56] 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. As a result, the seal is connected to insertion openings in the curvature. The indentation of the vault opens the seal and also serves as a "tamper proof". This construction variant can also be used with both materials, plastic and aluminum. The lower lid part 2 shown in FIG. 29 and FIG. 30 each has a seal here in different variants ό and ό '.

The can lid 51 in FIG. 31a consists of a lower lid part 52 and an upper lid part 53. The lower lid part 52 corresponds to a standard can lid. This has a fastening joint 54 into which a hook 55 of the upper cover part 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. In Figure 31b, the same lid 51 is shown again in three-dimensional representation.

The can lid 61 in FIG. 31c again consists of a lower lid part 62 corresponding to the normal can lid and an upper lid part 63. However, this time a second hook 65 is provided next to the first hook 64 on the upper lid part 63 in order to better fit the upper lid part 63 to fix. 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 Figure 3 Id, the upper lid part 73 next to the hook 74 has a lateral indentation 75, which is in contact with the mounting joint 76 of the lower lid part 72, so as to laterally slip the upper lid part 73 to prevent. 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 for lifting the upper lid part 73, if they are not mounted continuously to the full extent.

[61] In the lid 81 in FIG. 3e, the lower lid part 82 has an inwardly directed fastening joint 83, which itself acts like a hook. The edge of the upper lid portion 84 is flat and has a rolled edge 85 to allow smooth rotation. Further, it has a V-shaped opening 86 which acts as a spring. If the V-shaped opening 86 is pressed together with the index finger and the thumb, the radius of the upper cover part 84 is reduced, thus enabling a slight rotation. With the smaller radius of the upper lid portion 84, this migrates along the mounting joint 83 upwards. [62] In the construction variant in FIG. 3 If, the lower cover part of the can lid 91 has as fastening joint 94 an inwardly directed beading edge 93 with a groove 95 which serves as a guide for the upper lid part 96. The groove 97 on the upper lid portion 96 increases the rigidity and establishes a constant distance between the lid portions to prevent locking during rotation of the upper lid portion 96.

[63] In the can lid 101 in FIG. 31g, the lower lid part 102 has a grooved shape 103, on which two inner plastic lid parts 104 have the functional elements and snap into the lower lid part 102. The toothed shape 103 of the lower lid portion 102 prevents the lid from slipping on the connecting surface. The arrangement of the toothing so far below the upper cover part 105 allows mounting without prior alignment, since there is always only a small distance to the next locking position. The two inner lid parts are provided with a snap-in device 106, which can be designed differently depending on the shape and the needs. If this extends along the radius', this can also serve as a guide rail, which can vary in height to accomplish a lifting of the inner upper lid portion 104. In addition to the attachment of the two inner lid parts, the latch can serve as a security seal which is broken when the lid is rotated. The second upper lid part 107 merely serves to provide a better gripping surface when turning. However, it is not necessary for the functioning since all functional components are located on the two inner cover parts.

[64] In the construction variant of a can lid 111 in FIG. 31, the lower lid part 112 is closed by a plastic mold 113 that locks into the opening of the lower lid part 112. The seal 113 has a number of tabs 114 with teeth that engage in a hook 11 also with teeth on the inner lid portion 116. The inner upper lid member 116 is latched onto the upper lid 116 in the upper position. When it is aligned with the opening of the lower lid part 112, the inner upper lid part 116 is pressed down to a second low position and snaps into the recess 117 a. The seal engages in the inner upper cover part and is torn or cut by the cutting device 118. [65] In the embodiment in FIG. 3, the conventional can body 121 has a flanged edge 122 on the closed side of the can. The second can lid 123 is attached prior to filling the can and a conventional simple lid 124 closes the can after filling.

[66] In the embodiment 131 in FIG. 3, Ij, the lower can lid 132 has a lowered plane 133 on which the functional elements are located. This has the advantage that by placing the functional elements on a lowered plane, the stack height used in previous conventional systems can be maintained.

[67] In the variant of a can lid 141 shown in FIG. 32a, the lower lid part 142 has an opening 143 whose edges 144 are folded inwards. These rounded edges 144 make a close contact with the cone 145 on the upper lid part, thereby achieving a seal. 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.

[68] In the construction variant of a can lid 151 in FIG. 32b, the lower lid part 152 has an opening 153 with the rim 154 folded upwards. This may be advantageous to prevent the liquid in the can from coming into contact with the open cut edge of the metal. Together with the tight fit of the cone 155 on the upper lid portion 156 is achieved until breaking a gas-tight seal.

In the construction variation 161 in FIG. 32c, the lower cover part 162 has a fold 163 in order to increase the rigidity of this area and at the same time the sealing surface. Sealing may be achieved by using a residual plastic composite material which is bonded in the contact area by heat or high frequency welding.

[70] 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 (compare Figure 32d). [71] When the fold 183 is placed below the surface of the lower lid, a larger amount of rotation is ensured when rotating and lifting the upper lid portion 184 (see FIG. 32e).

In the variant 191 shown in FIG. 32f, the lower cover part 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.

If the can lid 201 in FIG. 32e is separated from the lower can lid 202 and the upper can lid 203 by an elevation in the middle (not shown), the distance of the two lid parts 202 and 203 from each other outwards decreases with the radius , In addition, the pressure on the lid, when closed, also decreases with the radius starting from the center (i.e., the pressure in the center is higher than the sides). The asymmetrical shape of the cone 204 and the fold 205 here compensates.

[74] In the construction variant of a can lid 211 in FIG. 32h, 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 can be either a tear line 213 or a cut 214 protected by a seal. The seal breaks once it has been opened.

[75] The lid 211 is opened by rotating the upper lid member 215 over the elevation 216, pushing the rounded edge 217 on the upper lid member up and over the elevation 216, pushing it downwardly and breaking the seal.

[76] Once the connecting piece has been broken by turning the upper lid part 215 to the closed position, the piece will swing even further back since the second elevation 218 cooperates with the side surface of the cone 219 of the upper lid part 215 (see the position of the lid 211) in FIG. 321).

In the construction variant of a can lid 221, which is shown in Figures 32j and 32k in closed and open position, the lower lid portion 222 has a series of perforations 223, 224 and 225, which is covered by a soft seal 226. Due to the small diameter of the openings, the pressure on the seal is sufficient reduced so that it holds without further attachment. In addition, the lid, which will close the can later, acts as an additional support for the seal.

[78] The can lid 221 is opened by some cones with punched holes 227, 228 and 229 (see Figure 32k). These have a cut edge that hits the exposed rubber seal. Once these cones 227, 228 and 229 are aligned with the openings 223, 224 and 225, they snap in and the cut takes place. Through the resulting openings then liquid can flow. The severed plastic sticks to the main seal 226 and is pushed aside only by the cones 227, 228 and 229. Due to the small size of the holes, this structure prevents insects from getting inside the can.

FIGS. 32 and 32 show the use of a seal 234. FIG. 321 shows the seal in its original form before it is installed in the cover 231. The seal 234 is shaped to easily fit within the opening 235 in the lower lid portion 232 for later tight welding at that location to achieve sealing. The seal 234 has a predetermined breaking point 236, which will be postponed when the elevation 237 is pressed down on the upper cover part 233. This pressure is transferred via the projection 238 on the seal 234, whereby this is torn open. The upper cover part 233 has openings 239, in which tongue-shaped tabs 240 engage the seal.

The can lid 241 in Figure 32 o again consists of a lower lid part 242 and an upper lid part 243. In the upper lid part, the seal 244 is integrated. The upper lid part 243, which is made of plastic, is shown separately in FIG. 32n. This original shape of the seal, as seen in Figure 32n, allows the sealing part 245 to be easily adapted to the shape of the opening 246 in the lower cover part 242. The seal is later welded to the lower cover part 242 to allow a secure seal. When the can lid 241 is opened, the portion of the gasket 245 that is connected to the lower lid portion 242 remains at that location, the remainder separates at the tear line 247 and remains part of the upper lid portion 243 with the remaining seal portion. [81] In the can lid 251 in Figure 32p, the plastic gasket 253 is surrounded by a rib-shaped structure 254 which locks into a fixed position when pushed down. By pushing the seal down, the lower part of the seal 255 breaks off. The upper part of the seal cooperates with the lower part of the seal to close the can again.

[82] The seal 253 engages in three positions, the upper cover part 256, the lower cover part 252 and finally against itself, when the seal has been broken (see Figure 32q).

[83] In the construction variant in FIG. 32r, a seal 264 is snapped into the opening of the lower cover part 262. The gasket has a tear line 265 and a rod shape 266. When the gasket 264 is pushed down, the upper plastic part 267 engages a rib-shaped structure 268 in the upper lid part 263. It continues to snap down to a position which allows the seal to be connected to the plastic part by the rod-shaped structure 265. As a result of this movement, the plastic part with its cutting edge 269 breaks through the seal 264. As can be seen in FIG. 32f, the conical cutting tip 269 simultaneously protects the cutting region of the seal 264 and the seal 264 with respect to the cover surface.

[84] As shown in FIG. 33, there are various design variants for guiding the upper part on the lower cover part. Here, FIG. 33a shows a three-dimensional representation of the lower cover part 272 and the upper cover part 273. These can be seen as a cover 271 in cross-section in FIG. 33b. 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 part 273 is rotated, the ramp 274 pushes against the corner 275 of the upper lid part 273 and lifts it upwards. A 180 ° rotation brings the lid parts 273 and 272 back to the starting position.

[85] In the body variant 281 in Figs. 33c and 33d, the lower lid member 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 lid member 284 is rotated on the lower lid member, the two intermediate projections meet and the caps are separated from each other. The case tion 286 of the upper lid portion 284 prevents permanent damage by lifting and facilitates lifting in this area.

[86] In the body variant 291 in FIGS. 33e and 33f, the lower part 292 again has two ramps 293 and 294. This time configured differently is the upper 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.

[87] The embodiment variant 301 shown in FIGS. 33g and 33h has two ramps 303 and 304 in the lower cover 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.

[88] In the construction variant illustrated in FIG. 33i, the lower cover part 312 has a three-sided elevation 313. The upper lid part 317 has a smaller opening 314, a larger opening 315 and a closed cap 316, and also an elevation 318. With the help of the three-sided elevations 313, 318 so each of these functional elements by turning the upper lid portion 317 with the opening 319 in the lower lid part 312 are brought into coincidence.

[89] In the body variant 321 in FIG. 34a (left after opening, right before), a hard plastic seal 324 is used in the opening 325 of the lower lid part 322. The seal 324 has a tear line 328. The upper lid portion 323 has an elevation 329 which has tabbed holes 327 which cooperate with the tabs 330 with teeth as the elevation 329 is forced downwardly. As a result, the gasket is stretched so that it travels at the intended tear line 328. The torn seal remains connected to the top 323 and serves as a closure to reseal the can after opening.

In the construction variant 331 in Figure 34b (right after opening, left in front), 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 lift lamps 335, the elevation 336 jumps from convex to concave. When that happens, the two fold Flaps 337 and 337 " slightly outwardly and hold upper lid portion 334 upwardly, in this upper position, the can can only be closed, but not sealed, to seal the can, the two flaps 337 and 337 " original position, whereupon the upper lid portion 334 engages.

In the construction variant 341 in FIG. 34c, the cone 347 of the upper cover part 343 has an asymmetrical shape with an elevation 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.

[92] In the body variant 351, shown in the open position in FIG. 34d and in the closed position in FIG. 34e, a plastic seal 354 is attached to the lower lid part 352. This has a latching device 355, which will later cooperate with the upper cover part 353. The upper cover part 353 has a latching device 356, which is connected to a tab 357 with the upper cover part 353. When the latch member 356 is pressed into the guide 358, the upper lid member 353 is lifted. As a result, the seal 354 on the lower cover part 352 is broken through (compare FIG.

[93] In the embodiment of Figs. 34f and 34g, the lower lid portion 362 has a greatly outwardly-curved opening 363. This secures the seal 364. The connection between the cone 365 of the upper lid part 366 and the seal 364 is interrupted when the protrusion 367 is pressed from the concave position in Figure 34f to the convex position 34g.

[94] In the construction variant of a can lid 371 in FIGS. 34h and 34i, the lower lid part 372 remains covered with the original surface of the lid. The area under the side wall has a tear line 373 or is partially cut 374, but not completely severed so that material stops to serve as a hinge for the broken material. The lid 371 is opened by the upper lid part 375 is rotated over the elevation 376, wherein the edge 377 is pushed on the upper lid part on and over the elevation 376.

[95] In the closed position (see Fig. 34i), the lid piece broken open at the bottom swings even further back, since the second elevation 378 cooperates with the side surface of the cone 379 of the upper lid portion 375.

The inner ring 384 of the upper lid portion 383 exerts sufficient pressure on the seal 385 so that the can lid 381 shown in FIGS. 34j and 34k is tightly closed. In addition, the inner ring 384 protects the elastic seal from expanding at extreme pressures. Once the lid 381 is opened, the opened wall of the cones 385, 386, 387 pushes so tightly into the seal 385 that no liquid can get in between.

[97] In the variant illustrated in FIGS. 34 1 and 34 m, the upper part 394 of the seal 395, when pressed into its final position, exerts a lateral pressure on the wall 396 of the opening edge and thus forms a seal. At the same time, the top portion 394 of the gasket also cuts the actual gasket at the intended tear line 398. The broken portion 397 of the gasket integrates with the top portion 394.

[98] In the construction variant of a lid 401 (see Figures 34n and 34o), the lower lid portion 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 opened by pushing down the elevation 406 from its concave (Figure 34n) into a convex shape (Figure 34 o).

Claims

claims:

1. lid for opening and closing of cans, in particular beverage cans, characterized in that it comprises an upper circular cover part and a lower lid part and by movement of the cover parts relative to each other at least one through hole can be achieved by both cover parts by movement of the cover parts relative to each other can be closed again.

2. Lid according to claim 1, characterized in that the lower lid part has a beaded edge and the upper lid part is fixed within the beaded rim on the lower lid part.

3. Lid according to claim 1 or claim 2, characterized in that the lower lid part has at least one opening.

4. Lid according to one of claims 1 to 3, characterized in that the upper lid part is rotatably mounted on the lower lid part.

5. Lid, in particular according to one of claims 1 to 4, characterized in that the lower lid part has on its upper side a circular fastening 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 / or non-positively in the mounting groove.

6. Lid according to one of the preceding claims, characterized in that the lower lid part has an elevation which cooperates with a corresponding configuration of the upper lid part.

7. Lid according to one of the preceding claims, characterized in that the lower and / or the upper cover part of one or more of the materials aluminum, plastic and / or soft sheet are.

8. Lid according to one of the preceding claims, characterized in that the upper lid part has a recess.

9. Lid according to one of the preceding claims, characterized in that the upper cover part has at least one circular segment-shaped recess.

10. Lid according to one of the preceding claims, characterized in that the opening and inner edge is angled.

11. Lid according to one of the preceding claims, characterized in that the upper and lower lid part form a sealing area in which the lower lid part presses directly against the upper lid part.

12. Lid according to one of the preceding claims, characterized in that the sealing area lies below the lid surface.

13. Lid according to one of the preceding claims, characterized in that the lower lid part has a downward sloping to the opening surface.

14. Lid according to one of the preceding claims, characterized in that a seal is arranged between the lid parts.

15. Lid according to claim 14, characterized in that the seal fits positively into the opening in the lower lid part.

16. Lid according to claim 14 or 15, characterized in that the seal is positively connected to the upper lid part.

17. Lid according to one of the preceding claims, characterized in that the upper and / or the lower cover part is made of a hybrid layer material with a plastic layer.

18. Lid according to claim 17, characterized in that the plastic layer of the lower lid part lies on that of the upper lid part between the two lid parts.

19. A method of manufacturing a device according to any one of claims 1 to 18, characterized in that the upper lid and the lower lid are manufactured separately and connected to each other in a subsequent step.

20. A method for connecting a device according to one of claims 1 to 18 with a bottom of the can, characterized in that the prefabricated lid is connected in a subsequent step with the can.