EP2354021B1 - Container lid and method for manufacturing same - Google Patents

Description

The invention relates to a container lid with a resealable opening, in particular for beverage containers, with a lid surface made of a first plastic material and an edge portion surrounding the lid surface, wherein the lid surface has an opening area bounded by a circumferential tear-open notch.

Furthermore, the invention is directed to a method for manufacturing the container lid and containers which are equipped with such a lid.

US 2009/001081 A1 describes a resealable can lid with the features of the preamble of claim 1. In one embodiment, for sealing the once torn lid part, which may be made entirely of plastic, when reclosing a against the cover part to be pressed plastic seal provided.

US 6,286,703 B1 describes a can lid, in which an opening gap in the cover metal bridging plastic seal is torn open during initial opening and the seal parts are placed together again when reclosing.

From the EP 1 607 341 A1 For example, a can lid having a reclosable opening is known in which an opening is made in the metallic can lid and the edge of that opening is crimped to provide anchoring for a prefabricated plastic closure. The plastic closure part comprises a base part to be connected to the beaded edge of the can opening, in which opening formed by a flat plug is formed. The flat plug is connected to the opening edge via a plastic tear seam, so that the flat plug connected to a pull tab can be released by pulling over the tear tab of the plastic base part and pivoted into an open position. The opening can be temporarily closed again by pressing in the flat plug, which is preferably conical on its underside.

From the WO 2008/098558 A1 a can lid having a reclosable opening is known, in which an opening is also made in the metallic can lid into which a prefabricated, tearable plastic closure member is inserted, the prefabricated plastic member has a double flange at the edge into which engages the edge of the punched can opening and is fixed in it. The prefabricated plastic element comprises a closure part, which is connected to the peripheral edge of the plastic part via a tear seam. A pull tab connected to the closure part makes it possible to tear open the plastic tear seam between the peripheral area of the plastic part and the lid part and thus release the can opening. For the purpose of resealing, the closure part, which preferably remains in contact with the peripheral area via a tab region, can be pressed back into the opening.

From the GB 1 389 351 is a resealable can lid is known in which in particular the emergence of sharp edges should be avoided, as they arise when tearing ordinary tin cans over a tab. For this purpose, a prefabricated plastic part is snapped into a provided in the metallic can lid punched, which has a lid part which is connected via a thin plastic wall with the snapped into the can opening base part. About a pull tab, the thin connecting wall between the closure part and the base part destroyed and the can opening are exposed. The closure part is designed so that it engages to reclosure of the opening via a snap-locking connection in the base part.

From the DE 89 11 286 U is a beverage can with a Eindrückdeckelverschluss known in which the tear tab is rotatably mounted on the cover wall and provided on it a closure element which is taken during rotation of the pull tab from the tear position in a Verschließstellung above the open pouring and covering the pouring over covering or closing in this intervenes.

From the DE 90 05 150 U a beverage can with a lid consisting of sheet metal is known, in which a weakening line is formed and delimited by the weakening line lid part is detachable by means of a pull tab, wherein on the lid captive a substantially parallel to the lid surface pivotable closure part is attached to the removal opening.

From the DE 196 13 246 a metal lid for beverage cans is known, which has a pre-punched pouring opening in the lid surface, which is sealed by a closure element and after the first opening is again tightly closed. In this case, cover and closure element can be positively connected to one another by means of bayonet-like interlocking elements, which are formed directly from the lid material or the closure element.

The known constructions for reclosable container lids are disadvantageous in terms of the required ease of handling, the essential gas-tightness for the durability of the respective container contents and the usability in conventional installations of a container filling line, which have led to these container closures not being used industrially.

The object of the invention is to provide a container lid, in particular for beverage containers, with a reclosable opening which not only processes in the available installations of a container filling line, i. applied to the container and can be connected to this airtight and gas-tight, but above all ensures a high-quality, gas and liquid-tight closure in the reclosable opening, only low opening and reclosing forces requires and in particular a one-handed operation when opening and Close allows.

This object is achieved according to the invention starting from a container lid with the features cited in the preamble of claim 1 characterized in that a particular intended for breaking the tearing notch two-armed lever member is on the one hand connected to a pull tab and on the other hand engages the opening portion of the lid surface and is supported by a force applied to the pull tab opening force translating bearing. The opening region is designed as a closure lid and is connected at its outer edge of the tear notch adjacent force and / or positive fit with a collar part of a second plastic material. The collar part is associated with a lid outside of the opening portion and the Aufreißkerbe adjacent to the lid surface shaped lid receiving part of the first plastic material. Furthermore, the collar part engages over the lid receiving part and between the collar part and the lid receiving part is formed a sealing snap-locking connection with a circumferential dome rib and a complementarily shaped recess. The pull tab is fastened to a fixing region of the collar part radially outside the lid receiving part, and the two-armed lever for breaking the tear notch is formed by a partial circumferential region of the collar part assigned to the fixing region.

By turning away from previously known, prefabricated closure units that had to be connected via flange elements and the like with the container lid, and the integration of lid receiving part and collar part according to the invention in the lid having a circumferential tearing notch a very compact, liquid-tight and gas-tight reclosable unit is created on the one hand which can be opened with little force by exploiting a partial circumferential region of the collar part as supported on the lid receiving part lever and easily meets the required requirements for the tightness in the case of reclosing the container opening due to the provided positive snap-locking connection.

In order to ensure the captivity of the reclosure ensuring collar part, a pivot plate connection is preferably provided opposite the fixing region between the collar part and at least one provided on the cover surface anchoring element, wherein anchoring element, pivot plate connection and collar part made of the same plastic material.

According to one embodiment of the invention, it is provided that the existing in particular of a third plastic pull tab rests in the rest state on the collar part and extending from the fixing approximately to the opposite inner edge of the collar part, wherein the elasticity of the material of the pull tab is in particular greater than the elasticity the material of the lid receiving part, which in turn is then more elastic than the material of the collar part, when the lid receiving part of the snap-locking connection associated recess is provided. This embodiment promotes easy handling while minimizing the space required for the pull tab. According to an alternative embodiment of the invention, it is provided that recesses, in particular with undercuts, and / or at least one attachment lug are provided for the fixed connection of the collar part with the opening region and the anchoring element with the cover surface or with the edge section in the opening region and in the cover surface or edge region are, and that collar part, lid receiving part and / or anchoring element are positively and / or non-positively fixed in the recesses and / or on the mounting boss by an injection molding process.

Conveniently, in the preferably at least one single- or multi-limbed film hinge comprehensive swivel flap connection between the collar part and the anchoring element a known buckling spring element integrated, which during pivoting of the cover part performing collar part over a Aufschwenkwinkel of advantageously more than 90 ° this cover part in the pivoted position holds. A pivoting back of the cover part is possible in connection with such a buckling spring element without problems.

In particular, the circumferential dome rib on the collar part and the complementarily shaped recess in the lid receiving part are provided. A reverse arrangement may be used to prevent liquid flowing through the opening from accumulating in the recess of the lid receiving member.

In order to ensure the requirement for stackability of a vessel equipped with the container lid according to the invention as in the case of conventional doses, the height of the above the lid surface located structure of lid receiving part, collar part and pull tab is designed so that it is less than the distance between the lid surface and a in relation to the lid surface in the vertical direction extending edge of the edge portion. It is also possible to keep the container lid peripheral edge free while maintaining a further container parked on a container lid and at the same time to ensure that the lid components provided for the closure of the container are spatially compact enough to fit in the inside curvature usually formed in a container bottom Find.

The lid surface and the edge portion of the container lid may be integrally formed. Alternatively, it is possible to provide a metallic edge portion connectable, for example, with a flare connection, to a container (e.g., a conventional can). In this embodiment of the container lid, a recess for receiving the lid surface is provided in the edge portion. The cover surface is injection-molded into the recess, wherein the recess adjacent areas of the edge portion are encapsulated on both sides edge-spreading with the plastic material of the cover surface.

Preferably, the end faces and the adjacent edge regions of the recess are encapsulated with a third plastic material in the form of an elastic sealing material in order to ensure a tightness of the connection lid surface / edge portion. The sealing effect of the sealing material is increased if the sealing material is set under pretension by the plastic material of the cover surface surrounding it and connecting with it.

For practical handling of particular advantage is further that the particular ring-shaped pull tab is easily gripped by the pull tab for actuation or engaged, since the collar part is kept spaced with respect to the opening portion and the pull tab due to their distance with an opening finger can be detected and operated under cross. In other words, between the pull tab and the opening area always a defined, in particular by the collar part height predetermined distance. This distance makes it possible to easily grasp the pull tab with a finger, easily lift the pull tab and then apply the required for the purpose of full container opening traction. Any risk of injury or damage to a fingernail during the opening process is thus eliminated, and a one-hand or blind operation is possible without any problem.

Further advantageous features of a container lid according to the present invention are specified in the subclaims, the description and the attached drawings.

The invention further relates to a method for producing a container lid with an outer edge portion and a recessed to the inside lid surface in which a resealable opening portion is provided.

The method according to the invention, which is characterized by particular simplicity and by the achievable quality of the resealable opening unit, consists in particular in that the edge section is punched, wherein a recess for the cover surface is provided. Then, the cover surface is injected to form a positive and / or non-positive gas-tight connection with the edge portion in the recess of a plastic material possessing a predetermined elasticity, wherein in the cover surface, a circumferential opening tearing notch and the tear notch at least on the outside adjacent a lid receiving part are formed with a first coupling element.

Alternatively, the edge portion and the lid surface are integrally molded from a plastic material possessing a predeterminable elasticity, wherein a lid receiving portion having a first coupling element is formed in the lid surface adjacent to the opening portion and the tear notch adjacent at least on the outside.

Both methods have in common that then the container lid with the lid receiving part used as a counter-mold and an annular collar part injected from a not connected to the material of the lid receiving part plastic material and the tearing notch inside the opening area is positively and / or non-positively connected, said this annular collar part is designed such that it engages over the lid receiving part and has a complementary to the first coupling element second coupling element and both coupling elements form a snap-locking connection. In particular, a pull tab of elastic material is injected simultaneously with the collar part, which is anchored at one end in a radially outer portion of the collar part and extending in the form of a ring tab to the container lid center region.

The individual injection molding operations required for the production of the container lid can be realized problem-free in conventional technology, it being evident that in the course of production the lid surface can be used with the already formed lid receiving part as a negative mold for the next injection molding process to form collar part and anchoring element, so that the optimal interaction and the required form-fit in connection with the reclosability can be perfectly achieved.

Further special features of the method according to the invention are specified in the subclaims, the description and the attached drawings.

Finally, the invention is also directed to a complete container for packaging flowable or pourable products, which is characterized in that it is closed with a container lid with the characteristics of one or more of the container lid claims related.

Fig. 1

eine perspektivische Schrägansicht einer Ausführungsform eines wiederverschließbaren Behälterdeckels nach der Erfindung,

Fig. 2

eine Draufsicht des Behälterdeckels nach Fig. 1,

Fig. 3

eine Schnittansicht entsprechend der Linie E-E von Fig. 2,

Fig. 4

eine vergrößerte Schnittansicht entsprechend dem kreisförmig gekennzeichneten Teilbereich von Fig. 3,

Fig. 5

eine weitere Ausführungsform des erfindungsgemäßen Behälterdeckels,

Fig. 6

einen Ausschnitt einer Ausführungsform des erfindungsgemäßen Behälterdeckels mit einem metallischen Randschnitt mit einer Ausnehmung, in die eine Deckelfläche gespritzt ist,

Fig.7

eine weitere Ausführungsform des erfindungsgemäßen Behälterdeckels, und

Fig. 8

eine vergrößerte Schnittansicht entsprechend dem kreisförmig gekennzeichneten Teilbereich von Fig. 7.

The invention will now be described purely by way of example with reference to exemplary embodiments with reference to the drawings; the drawings show:

Fig. 1

3 is an oblique perspective view of an embodiment of a resealable container lid according to the invention,

Fig. 2

a plan view of the container lid after Fig. 1 .

Fig. 3

a sectional view corresponding to the line EE of Fig. 2 .

Fig. 4

an enlarged sectional view corresponding to the circular marked portion of Fig. 3 .

Fig. 5

a further embodiment of the container lid according to the invention,

Fig. 6

a detail of an embodiment of the container lid according to the invention with a metallic edge section having a recess into which a lid surface is injected,

Figure 7

a further embodiment of the container lid according to the invention, and

Fig. 8

an enlarged sectional view corresponding to the circular marked portion of Fig. 7 ,

Fig. 1 shows a container lid 1 made of plastic with a rim portion 2 and a lid surface 3. In the lid surface 3, off-center offset, a resealable opening is integrated, as will be explained in detail.

In Fig. 1 to recognize a connected with a tear tab 15 collar member 5, which is fixedly connected to an opening portion 11 of the container lid 1 and this encloses approximately annular. The connected to the collar part 5 opening portion 11 which can be swung up by means of the tab 15 during the opening process, is anchored to ensure the captivity of the swing-up part with an anchoring element 14 in the container lid 1, wherein a buckling spring element 22 ensures that the lid 1 held in the open position is, in particular, when it is swung over more than an angle of 90 °.

The top view Fig. 2 again shows those related to Fig. 1 already mentioned components. The Fig. 2 clarifies that the resealable opening with all its associated components Off-center, in fact arranged such that, in spite of the presence of the resealable opening, the stackability is unchanged as in conventional containers. Prerequisite for this is in addition to the positioning above all the compactness of the resealable opening according to the invention (see also Fig. 3 ). The supernatant of the components of the resealable opening on the cover surface 3 is according to the invention only about 2 mm.

Fig. 3 shows the basic structure of the integrated in the container lid resealable opening according to the invention in a sectional view along the line EE in Fig. 2 ,

One of the essential requirements placed on a resealable container lid is that the container, which is closed with a container lid, must be liquid-tight and gas-tight, especially in the area of the resealable opening. Even after the container has been opened via the resealable closure, this closure must ensure that gas-tightness is ensured, since internal pressures in the range of approximately 2 bar may occur due to shaking or shaking effects, in particular in the case of carbonated beverages, with undesirable outgassing effects could adjust if the resealable closure would not ensure the required tightness.

Fig. 3 indicates that the resealable closure according to the invention is a unit in which the closure components are integrated into the lid 1. The tear-open area is defined by a conventional tear notch 4 in the lid surface 3. The essential components of the closure according to the invention are formed by a circumferential lid receiving part 10 and a co-operating therewith in the manner of a snap-lock closure collar part 5, which forms together with the located within the tear notch 4 opening portion 11, the swing-lid part, which is connected via a pivot plate connection 16 with the anchoring element 14. On the collar part 5 engages on the outside and the anchoring element 14 opposite the pull tab 15 at.

The lid surface 3 comprises a peripheral viewing surface 23 and a lid surface portion 23 a, which receives the essential components of the closure according to the invention. The lid surface portion 23 a is recessed relative to the viewing surface 23. The lid surface portion 23a comprises the opening portion 11 defined by the circumferential tear-open groove 4 of known type. The visible surface 23 and the lid surface portion 23a with the opening portion 11 are formed integrally.

Fig. 4 shows a significantly enlarged sectional view corresponding to the circular marked portion of Fig. 3 whereby details of the structure of the container lid 1 can be seen more clearly.

In the common spraying of the lid surface 3 and the edge portion 2, the lid receiving part 10 is formed, wherein an annular recess 12 is provided, which has approximately the shape of a downwardly widening U in cross section and is suitable, a snap-locking receptacle for a corresponding / complementary To form counter element.

The adjacent to the tear notch 4 circumferentially provided lid receiving part 10 is associated with the collar part 5, which consists of one of the Cover surface 3 - and thus also the lid receiving part 10 - different plastic material and is chosen so that it does not connect with the injection molding process with the material of the lid surface 3 and the cover receiving part 10.

The collar part 5 is firmly and gas-tightly connected to the opening region 11 of the container lid, for which purpose a peripheral, web-like attachment projection 6 with openings 7 is provided adjacent to the tear-open groove 4 in the region of the outer circumference of the opening region 11. These perforations 7 allow the formation of webs of the material of the collar part 5, which extend through the formed on the opening portion 11 mounting lug 6 and thus allow a reliable connection of the opening portion 11 and the collar part 5.

In the shaping of the cover receiving part 10 extending over the collar part 5 to a recess 12 in the lid receiving part 10 complementarily shaped rib 9 is formed, so that the already mentioned snap-locking connection can be created.

Simultaneously with the formation of the collar part 5, serve in the portions of the lid surface 3 and the lid receiving part 10 already integrated therein as a counter-mold, and the pivot plate connection 16 is also provided with the anchoring element 14 also formed simultaneously. The anchoring element 14 can be formed in substantially the same way and is constructed in an analogous manner as the connection between the collar part 5 and the opening portion 11. Between film hinges 21, which are provided adjacent to the anchoring element 14, is in the pivot plate connection 16 from the the same material existing buckling spring element 22 integrated by conventional design. This buckling spring element 22 holds the collar part 5 with the attached opening portion 11 in the open position when it is swung by more than 90 °. When closing the lid, the buckling spring element 22 snaps over and obstructs the closing process in any way.

At the region of the collar part 5, which is located closest to the edge portion 2 and which is opposite the anchoring element 14, the collar part 5 is connected to a fixing region 13 with the flexibly formed pull tab 15, wherein the connection preferably takes place in the context of an injection process. The pull tab 15 extends to the opposite inner region of the collar member 5, is applied to this and extends substantially parallel to the plane of the opening portion 11, i. it is in the closed state of the resealable opening before a very space-saving, compact arrangement.

It has already been mentioned that different plastic materials are to be used for different components. In the embodiment according to Fig. 4 For the lid surface 3, a plastic material is used, which ensures a slight expansion of the recess 12 when pressing the dome rib 9 and then holding this dome rib 9 via a rounded undercut. For the collar part 5, a plastic material is used, on the one hand with the material of the lid receiving part 10 no connection and on the other hand also significantly inelastic than the material of the lid receiving part 10. This is also important because the collar part 5 must have a basic stiffness, which is required for the container opening operation.

The plastic material used for the pull tab 15 preferably again differs from the already mentioned plastic materials and is so elastic that the pull tab 15 can be easily raised by grasping and then operated in the manner required for opening.

For the first-time opening of a container provided with the container lid 1, it is necessary that the circumferential tear-open 4 is broken and then the lid portion formed by the opening portion 11 and the collar member 5 can be pivoted high side.

Since a relatively small opening force is required with respect to the opening operation, an opening force transmission is realized in the application subject, which is realized in that the pull tab 15 is hinged to the radially outer fixing portion 13 of the collar member 5 and pulling the radially outer end of the collar member 5 by means of the pull tab 15 a supporting of the collar member 5 on the radially inner leg of the recess 12 of the lid receiving part 10 takes place and thus the relatively long lever between this leg and the fixing portion 13 cooperates with the much shorter lever which acts between this acting as a support leg radially inner leg of the lid receiving part 10th and the attachment point of the collar part 5 is formed at the opening portion 11 and is effective. The shorter lever is thereby moved inward, ie towards the container interior and the resulting deformation causes - possibly supported by a provided for increasing the rigidity local projection, which can be provided if necessary - a local breaking of the tear 4, then on further pulling the pull tab 15 is separated with little force over the entire circumference. In this case, the dome rib 9 leaves the corresponding recess 12 in the lid receiving part. The lid part can then after complete separation of the snap-locking connection via the pivot plate connection 16 and the film hinges 21 of the formed free opening and swung up. By the existing buckling spring element 22, the open lid part is held in the open position.

To reclosure of the opening of a precisely guided by a two-armed pivot plate connection 16 cover part is brought back to rest on the cover receiving part 10, wherein the form-fitting in the corresponding recess 12 snapping circumferential rib 9 by slight pressure in the in Fig. 4 shown closed position can be transferred.

The initial opening of the container differs from subsequent opening and closing operations as a rule by the fact that the force required for initial opening is significantly greater than the force required for reopening after reclosure force and above all, the case perceptible noise significantly different is.

If desired, between the lid receiving part 10 and the collar part 5 at least one by the initial opening operation of the collar member 5 inevitably in its structure and / or appearance and / or its position changed visual element are provided, which fulfills a "sealing function".

Fig. 5 shows a lid 1, the edge portion 2 is provided with an internal thread 17, so that the lid 1 can be screwed onto a container with a complementary external thread, such as a bottle. The container can be refilled in a simple manner, since the cover 1 can be unscrewed if necessary and refilling does not have to be done by the resealable opening portion 11.

In order to ensure the tightness of the detachable screw connection between the cover 1 and the container, a sealing ring 18 is provided.

The above-described embodiments of the subject invention each have a rim portion 2 and a lid surface 3 formed integrally from a plastic. Alternatively, the edge portion 2 may be made of a different material, such as metal, and / or coated. Even with such embodiments, a reliable and strong and above all gas-tight coupling between the material of the edge portion 2 and the plastic of the lid surface 3 must be ensured.

For example, the metal sheets used for many beverage containers are provided with paint layers. These paint layers often do not reliably connect with one of the plastics which are suitable for the formation of the cover surface 3. The resulting in a direct encapsulation of the edge portion 2 by the material of the lid surface 3 coupling of the two components is therefore not gas-tight in many cases. To solve this problem, adhesion promoters can be used. Another solution is to create a connection with sealing materials.

Fig. 6 shows schematically how such a connection can be constructed. A region of the metallic edge section 2 which adjoins a recess and is provided for the shaping of the cover surface 3 is first encapsulated by an elastic sealing material 8 (usually a plastic). The recess is covered on the face side and in the vicinity of the end face with the sealing material 8. During the subsequent spraying of the cover surface 3, on the one hand a connection between the elastic sealing material 8 and the Plastic material of the lid surface 3 is reached, but of crucial importance is that the sealing material 8 is set by the plastic material of the lid surface 3 under tension, so that even the container interior against the atmosphere can be completely closed gas-tight, if the plastic materials with the connect paint used for coating the edge section 2, because it is realized here working with a permanent mechanical bias seal. The bias voltage is achieved by the injection pressure and the resulting during spraying emphasis.

Fig. 7 shows a further embodiment of the lid 1 for closing a bottle 24. The edge portion 2 of the lid 1 is formed substantially like a crown cap. However, in contrast to conventional bottle caps, in its central region it has a recess into which the lid surface 3 is injected. In order to improve a mechanical connection between the annular edge portion 2 and the lid surface 3, the former has perforations 7 '. Through the openings 7 'can occur in the injection process of the lid surface 3 plastic material and form webs that reliably connect the two components together.

Although the connection described above can be formed analogous to the gas-tight connection, which is based on the Fig. 6 was explained. However, this is not necessary because it is not in contact with the interior of the bottle 24. The tightness of the bottle closure therefore depends only on the tightness of the reclosable opening portion 11 associated snap-locking connection and the tightness of the contact between the lid surface 3 and an edge of the bottle 24.

Fig. 8 shows an enlargement of the marked with a circle area of Fig. 7 , It can be seen that the structure of the resealable closure is basically constructed as in the covers 1 of Fig. 1 to 4 or 5. A difference is that the collar part 5 not only has an annular structure, but is additionally provided with a collar portion 25 which covers the opening area 11 of the lid surface 3 and which, inter alia, has an additional stabilizing effect.

In addition, it is pointed out that the anchoring element 14 does not necessarily have to be formed on the cover surface 3. It can also be provided on the edge portion 2. For this purpose, for example, a recess with one or more undercuts in the edge portion 2 may be formed. Alternatively, an anchoring recess can be provided in the edge section 2, in which the anchoring element 14 analogous to that in connection with the in Fig. 6 anchoring the lid surface 3 described in the edge portion 2 is fixed.

• Zunächst werden der Randabschnitt 2 und die Deckelfläche 3 einstückig aus einem eine vorgebbare Elastizität besitzenden Kunststoffmaterial gespritzt, wobei in der Deckelfläche 3 die den Öffnungsbereich 11 umlaufende Aufreißkerbe 4 sowie der Aufreißkerbe 4 zumindest außenseitig benachbart der Deckelaufnahmeteil 10 mit der Ausnehmung 12 ausgebildet werden.

The inventive method for producing a container lid with a reclosable opening according to the embodiments described above comprises in particular the following method steps:

• First, the edge portion 2 and the lid surface 3 are integrally molded from a plastic material possessing a predetermined elasticity, wherein in the lid surface 3, the opening portion 11 circumferential tear-4 and the tear-4 at least on the outside adjacent the lid receiving part 10 are formed with the recess 12.

Alternatively, the edge portion 2 is first made, for example punched from a piece of metal, wherein a recess for the lid surface 3 is provided. In a next method step, if necessary, the recess can be extrusion coated on the face side and in the vicinity of its end face with the elastic sealing material 8. Then, the lid surface 3 is injected into the recess to form a positive and / or non-positive gas-tight connection with the edge portion 2, wherein in the lid surface 3, the opening portion 11 circumferential tear-4 and the tear-4 adjacent at least on the outside a lid receiving part 10 with the recess 12 are formed.

In both methods, the resultant structure of edge portion 2 and top surface 3 is then used with integrated lid receiving part 10 for the next injection molding process as a counter-mold, and the annular collar part 5 is injected from a non-connecting with the material of the lid receiving part 10 plastic material and the tear-4 on the inside adjacent to the opening portion 11 positively and / or non-positively connected, said annular collar part 5 is designed such that it engages over the lid receiving part 10 and has a recess 12 to the complementary shaped rib 9. The annular recess 12 in the lid receiving part 10 thus forms the counter-forming region for the positively engaging dome rib 9, which is an integral part of the annular collar part 5.

In particular, the pull tab 15 is sprayed simultaneously with the collar part 5, with one end in a radially outer portion of the collar part 5 is anchored and extends in the form of a ring tab 15 to the container lid center region.

Preferably, at the same time as the lid receiving part 10, a supporting area for the pivoting-plate connection 16, which is located on the side of the anchoring element 14, is also formed.

Simultaneously with the spraying of the collar part 5, preferably also the anchoring element 14 and the pivot plate connection 16, in particular with buckling spring element 22, are injected.

At the same time or offset in time for spraying the collar part 5, the pull tab 15 is also injected using an inclined shape, wherein the pull tab material in the fixing region 13 can penetrate into correspondingly provided recesses of the collar member 5 and in this way the pull tab 15 is fixed.

All embodiments of the invention have in common that the resealable container lid in the conventional production process, i. the process of processing container lids without resealable opening, processable and thus applied with the available facilities a Behälterabfülllinie on the respective container and the container can be closed. The gas tightness achieved according to the invention also ensures that the durability of the respective contents of the container is in no way adversely affected in comparison with non-resealable containers.

Finally, it should also be mentioned that in the container lid according to the invention favored by the space under the pull tab opening the container problem-free possible by a one-hand operation is because the easily accessible pull tab 15 can be grasped with a finger and pulled in the direction of the anchoring element 14 under opening of the container. The realized power transmission has a particularly advantageous effect.

LIST OF REFERENCE NUMBERS

1

container lid

2

edge section

3

cover surface

4

tear notch

5

collar part

6

mounting boss

7,7 '

perforation

8th

elastic sealing material

9

dome rib

10

Cover receiving part

11

opening area

12

recess

13

fusing

14

anchoring element

15

pull tab

16

Pivoting splice

17

inner thread

18

sealing ring

21

film hinge

22

Buckling spring element

23

viewing area

23a

Cover surface section

24

bottle

25

collar section

Claims (23)

1. A container lid having a reclosable opening,
   in particular for beverage containers, having
   a lid surface (3) composed of a first plastic material and a rim portion (2) surrounding the lid surface (3), with the lid surface (3) having an opening region (11) bounded by a peripheral tear notch (4),
   wherein a two-armed lever member is provided which is intended for breaking through the tear notch (4);
   which is connected to a pull tab (15), on the one hand, and engages at the opening region (11) of the lid surface (3), on the other hand, and which is supported via a support stepping up the opening force applied to the pull tab (15);
   characterised in that
   the opening region (11) is formed as a closure lid and is fixedly connected at its outer margin, adjacent to the tear notch (4) to a collar part (5) composed of a second plastic material;
   in that a lid receiving part (10) composed of the first plastic material and formed outside the opening region (11) and adjacent to the tear notch (4) at the lid surface (3) is associated with the collar part (5); in that the collar part (5) engages over the lid receiving part (10) and a sealing snap-in latching connection having a peripheral coupling rib (9) and a cut-out (12) shaped in complementary form thereto is formed between the collar part (5) and the lid receiving part (10); and
   in that the pull tab (15) is fastened radially outside the lid receiving part (10) to a fixing region (13) of the collar part (5) and the two-armed lever is formed for breaking through the tear notch (4) by a peripheral part region of the collar part (5) associated with the fixing region (13).
2. A container lid in accordance with claim 1,
   characterised in that
   a pivot tab connection (16) is provided opposite the fixing region (13) between the collar part (5) and at least one anchorage element (14) provided at the lid surface (3) or at the rim portion (2), with the anchorage element (14), the pivot tab connection (16) and the collar part (5) comprising the same plastic material.
3. A container lid in accordance with claim 1,
   characterised in that
   the pull tab (15) in particular comprising a third plastic material lies on the collar part (5) in the state of rest and extends from the fixing region (13) approximately up to the oppositely disposed inner margin of the collar part (5),
   with the elasticity of the material of the pull tab (15) in particular being larger than the elasticity of the material of the lid receiving part (10) which is in turn more elastic than the material of the collar part (5).
4. A container lid in accordance with claim 1, claim 2 or claim 3,
   characterised in that
   recesses (18), in particular having undercuts (19), and/or at least one connection portion (6), are provided in the opening region (11) and in the lid surface (13) or in the rim portion (2) for the fixed connection of the collar part (5) to the opening region (11) and also of the anchorage element (14) to the lid surface (3) or to the rim portion (2); and
   in that the collar part (5) and/or the anchorage element (14) are fixed in a shape matched and force transmitting manner in the recesses (18) and/or at the connection portion (6) by an in injection moulding process.
5. A container lid in accordance with claim 2,
   characterised in that
   the pivot tab connection (16) includes a two-limbed film hinge (21) and a kink spring element (22) which is formed between the limbs and which holds the pivoted open opening region (11) in an obtuse-angle open position.
6. A container lid in accordance with any one of the preceding claims,
   characterised in that
   the peripheral coupling rib (9) is provided at the collar part (5) and the cut-out (12) of complementary shape is provided in the lid receiving part (10).
7. A container lid in accordance with one or more of the preceding claims,
   characterised in that
   at least one visible element is provided between the lid receiving part (10) and the collar part (5) whose structure and/or whose appearance and/or whose position is necessarily changed by the first-time opening procedure of the collar part (5).
8. A container lid in accordance with one or more of the preceding claims,
   characterised in that
   
   the height of the structure of lid receiving part (10), collar part (5) and pull tab (15) disposed above the lid surface (3) is smaller than the spacing between the lid surface (3) and an edge of the rim portion (2) extending in a vertical direction with respect to the lid surface (3).
9. A container lid in accordance with one or more of the preceding claims,
   characterised in that
   the reclosable opening (11) and the components (5, 10, 14) associated with the opening (11) are formed in a lid surface section (23a) which is recessed with respect to a visible surface (23) surrounding them on all sides.
10. A container lid in accordance with one or more of the preceding claims,
    characterised in that
    the cover surface (3) and the rim portion (2) are made in one piece.
11. A container lid in accordance with one or more of the claims 1 to 9,
    characterised in that
    the rim portion (2) is made from metal and a cut-out is provided for receiving the lid surface (3); and in that the lid surface (3) is injection moulded into the cut-out, with regions of the rim portion (2) adjacent to the cut-out being overmoulded with the first plastic material at both sides in a manner gripping over the margin.
12. A container lid in accordance with claim 11,
    characterised in that
    the end surfaces and the adjacent marginal regions of the cut-out are overmoulded with a third plastic material in the form of an elastic sealing material (8); and in that this sealing material (8) is put under pre-load by the plastic material of the lid surface (3) surrounding it and connecting to it.
13. A container lid in accordance with one or more of the preceding claims,
    characterised in that
    the container lid includes a threaded section moulded on in one piece which is in particular provided with an internal thread (17) and with which a seal element (18) is preferably associated.
14. A container lid in accordance with one or more of the preceding claims,
    characterised in that
    the pull tab (15), in particular designed in ring form, is held by the collar part (5) spaced part with respect to the opening region (11) and the pull tab (15) can be gripped by being engaged beneath and actuated by an opening finger due to its spacing.
15. A method of manufacturing a container lid (1) having an outer rim portion (2) and a lid surface (3) which is set back inwardly thereto and in which a reclosable opening region (11) is provided, characterised in that
    the rim portion (2) is punched, with a cut-out for the lid surface (3) being provided;
    the lid surface (3) is injection moulded while forming a shape-matched or force-transmitting gas-tight connection to the rim portion (2) into the cut-out from a plastic material having a presettable elasticity, with a tear notch (4) running around the opening region (11) and a lid receiving element (10) having a first coupling element (12) and adjacent to the tear notch (4) at at least the outside being formed in the lid surface (3);
    the container lid is then used with the lid receiving part (10) as a countermould and a ring-shaped collar part (5) is injected from a plastic material not connecting to the material of the lid receiving part (10) and the tear notch (4) is connected adjacent to the opening region (11) at the inner side in a shape matched and/ or force transmitting manner,
    with this annular collar part (5) being designed so that it engages over the lid receiving part (10) and has a second coupling element (9) shaped in a complementary manner to the first coupling element(12) and both coupling elements (12, 9) forming a snap-in latching connection; and
    in that a pull tab (15) comprising elastic material is injected simultaneously with the collar part (5), is anchored at one end in a radially outwardly disposed fixing region (13) of the collar part (5) and extends in the form of a ring tab to the centre region of the can lid.
16. A method of manufacturing a container lid (1) having an outer rim portion (2) and a lid surface (3) which is set back inwardly thereto and in which a reclosable opening region (11) is provided,
    characterised in that
    the rim portion (2) and the lid surface (3) are injection moulded in one piece from a plastic material having a presettable elasticity, with a tear notch (4) running around the opening region (11) and a lid receiving part (10) adjacent to the tear notch (4) at at least the outer side and having a first coupling element (12) being formed in the lid surface (3);
    in that the container lid is then used with the lid receiving part (10) as a countermould and a ring-shaped collar part (5) is injection moulded from a plastic material not connecting to the material of the lid receiving part (10) and the tear notch (4) is connected adjacent to the opening region (11) at the inner side in a shape matched and/or force transmitting manner,
    with this annular collar part (5) being designed so that it engages over the lid receiving part (10) and has a second coupling element (9) shaped in a complementary manner to the first coupling element (12) and both coupling elements (12, 9) forming a snap-in latching connection; and
    in that a pull tab (15) comprising elastic material is in particular injected simultaneously with the collar part (5), is anchored at one end in a radially outwardly disposed fixing region (13) of the collar part (5) and extends in the form of a ring tab to the centre region of the container lid.
17. A method in accordance with claim 15 or claim 16,
    characterised in that
    a coupling cut-out (12) aligned substantially perpendicular to the lid surface and designed approximately in U shape in cross-section is formed as the first coupling element and a coupling rib (9) of complementary shape is formed as the second coupling element.
18. A method in accordance with claim 15,
    characterised in that
    an elastic sealing material is injected around the end faces of the cut-out as well as around adjacent marginal regions before the injection moulding of the lid surface (3), with this sealing material connecting, on the injection of the material of the lid surface (3), to this material and being put under pre-load.
19. A method in accordance with any one of the claims 15 to 18,
    characterised in that
    an anchorage element (14) disposed diametrically opposite the fixing region (13) for the pull tab (15) and spaced apart from the lid receiving part (10) is injected simultaneously with the injection of the lid receiving part (10) in the same injection process, is connected to the lid receiving part (10) via a pivot tab (16) and is composed of the same material.
20. A method in accordance with claim 19,
    characterised in that
    the mechanical connection between the anchorage element (14) and the lid surface (3) or the rim portion (2) is established in the same manner as the connection between the collar part (5) and the opening region (11) and using the same injection processes.
21. A method in accordance with claim 20,
    characterised in that
    on the injection of the pivot tab (16), a two-limbed film hinge (21) having a kink spring element (22) formed between the two limbs of this hinge (21) is simultaneously formed between the anchorage element (14) and the lid receiving part (10).
22. A container for packaging flowable or pourable products, in particular for the packaging of beverages,
    characterised in that
    the container is closed by a container lid (1) in accordance with one or more of the claims 1 to 13.
23. A container in accordance with claim 22,
    characterised in that
    a container base is inwardly arched in a dome-like manner for ensuring the stackability of the containers and for receiving the structure disposed above the lid surface (3) of lid receiving part (10), collar part (5) and pull tab (15); and in that the container lid has a rim portion free of structures.

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