EP2109569A1

EP2109569A1 - Peel resistant and tear resistant closure lid with lid ring

Info

Publication number: EP2109569A1
Application number: EP07847951A
Authority: EP
Inventors: Jean-François Jouillat
Original assignee: Impress Metal Packaging SA
Current assignee: Trivium Packaging West France SAS
Priority date: 2006-12-06
Filing date: 2007-12-06
Publication date: 2009-10-21
Anticipated expiration: 2027-12-06
Also published as: ES2334970T3; EP2109569B1; ES2334970T1; WO2008068326A1; PT2109569E; ATE483645T1; DK2109569T3; DE502007005300D1; PL2109569T3

Abstract

A lid is proposed. The lid has a lid ring (10) which is connectable to a container edge by means of rims or grooves and which has an outer rim edge (11), and a fastening flange (13) connected to the lid ring by means of a core wall (12) and which borders on a lid opening (15a). Thereon a closure film (15) which tightly seals the lid opening but which can be pulled away to uncover the opening is fastened by its edge area by an adhesive or a heat sealing (17). The closure film has a gripping flap (3) for the initiation and carrying out of the removal process, and the closure film (15) has ears (16) protruding outward at selected edge areas above the fastening area (17) of the film on the flange (13) of the lid ring (10) for the promotion of the removal process and for the prevention of tearing of the film edge during the removal process. Without requiring stronger and thicker materials for the closure film, a tearing of the film is largely avoided.

Description

Shelf-proof and tear-proof closure lid with lid ring

The invention relates to a lid for hulls of containers, which lid has a lid ring for tight and tight bonding (Anfalzen) with the edge of the container, and for this purpose has an outer beaded edge which is connected via a core wall with an inner flange, the with its inner edge (or end) delimits a lid opening, which in turn can be closed tightly by means of a matched sealing foil, which close to its edge on the flange of the lid ring, eg by gluing or heat sealing or the like, is fixed so that it can be pulled off from the flange for opening by means of a grip tab formed at a circumferential location of the sealing foil. The container is opened when the lid is already folded on him, in concrete, however, the

Lid open, with the closure film is peeled off.

However, practice has shown that peeling off the entire film often results in difficulties, depending on the shape and size of the opening and the performance of the peeling operation. These consist in the fact that the peeling operation is inhibited at certain points of the circumference of the opening or stops or the edge of the film when the peeling process reaches certain peripheral locations of the film or sealing seam breaks.

One can avoid these difficulties in part, if thicker, stronger

Closing films are used. However, this increases the cost of such covers and also complicates the processing and handling or sealing of the closure films.

It is an object of the invention to avoid the difficulties indicated as far as possible in a simple manner, without requiring stronger and thicker materials for the closure film. In this case, the solution for each outline shape and size of a lid opening can be applied, in particular for such an opening in a cover ring. This object is achieved by claim 1 or 11, 12, 13 or 16.

Preferably, the solution according to claims 1 or 2 or 3. These can be realized in a simple manner and allow an individual adaptation to the particular problems of certain outline shapes and sizes of the lid opening.

For this purpose, existing experiences are used to conventional closure films, which teach that the above-mentioned problems usually occur at certain, narrow limited peripheral regions of the sealing film (as "edge points") during the peeling operation of the sealing film.

The solution according to claim 16 can be used especially where, with an unusual format of the lid opening the necessary experience or not yet available.

The proposals of the independent claims are closely related. They differ, however, because the behavior of the closure films in the removal process depends mainly on their format (round, angular, oval, oblong (Hansa), or elongated). The placement of the ears on selected edge areas remains nevertheless common.

In any case, conventional sealing foils of small thickness below 100 μm can be used, so that the costs remain limited. These may be aluminum foils, sealable polymer foils or multilayer foils of different materials.

The self-disclosed sealing film (without cover ring, but suitable to be sealed on it) has at least two spaced from the grip tab on one side edge locations each outwardly projecting ear-shaped lobe piece or each projecting piece of film. They protrude beyond the normal boundary. The edge locations are selected to promote a continuous stripping operation and / or to block or prevent tearing of the closure film at the edge locations with the flap or film pieces inward.

Also disclosed are manufacturing methods for and method of operation of the lid

Tearing open the closure film of the independent claims (claim 22 or 23). To reinforce the desired effect, the measures according to claims 17 or 18 can additionally be used. An arcuate outward / upward forming facilitates gripping. Tilting the flange strengthens the resistance of the sealed seam.

The lid has in one embodiment a connectable to the container edge by folding lid ring with outer bead and connected to this by a core wall, a lid ring opening of any outline limiting mounting flange. Then one of the contour shape of the opening adapted and this tightly closing, but removable to expose the opening fastener film attached The attachment is made with the edge region, the peelable sealing film by gluing, heat sealing or the like. The closure film has at a first edge region an outwardly projecting gripping tab for initiating and carrying out the peeling operation, wherein the closure film for promoting the peeling process and for preventing the

Tearing of the film edge during the peeling process has a over the entire circumference or outer edge of the film reaching, beyond its attachment region also projecting edge strips.

In another embodiment, the cover has a cover ring which can be connected to the container edge by folding and has an outer flanged edge and a fastening flange connected to it by a core wall and defining a substantially circular or oval or long oval cover opening (claim 12). Then a lid opening tightly closing, but removable to expose the opening closure film with its edge region is adhesively secured by gluing or heat sealing. The closure film has at one circumferential location - in the case of an oval opening, in particular centrally at an arcuate end region of the closure film - an outwardly protruding grip tab for initiating and carrying out a removal operation. The sealing film has at a predetermined or given angular distance, in particular at an angular distance of between 10 ° and 60 °, on both sides of a

Center plane of the grip tab over the attachment area outwardly projecting pieces of film.

The lid has in yet another embodiment a connectable with a container edge by folding lid ring with outer fold edge (beaded edge) and connected to this by a core wall, a substantially square or rectangular lid opening limiting mounting flange on which the lid opening tightly closing, but for Exposing the opening removable Closing film with its edge region by gluing, heat sealing or the like. Fabric closure is attached. The closure film has at a corner portion a diagonally outwardly projecting gripping tab for initiating and carrying out the peeling operation, the closure film being used to promote the peeling operation and to prevent tearing of the film edge during a peeling operation

Peeling operation at the outgoing edges or sides of the corner region - at a predetermined angular distance on either side of a diagonally oriented center line of the grip tab - on the attachment region of the sealing film on the cover ring - outwardly projecting pieces of film.

The invention is described below with reference to schematic drawings of several embodiments. Show it

Figure 1 in plan view a closure film 1 for a cover ring with circular inner opening.

FIG. 1a,

FIG. 1 b are detail enlargements and variations of a region 7 a as 7 a 'and 7 a ".

Figure 2 in cross-section and perspective view a

Section of a lid with cover ring 10 sealed sealing film 15th

Figure 3 shows a comparison with Figure 2 modified version in cross section.

Figure 4 in plan view a closure film 26 for a lid with a long-oval lid opening.

Figure 5 is a plan view of a closure film 35 for a lid with a rectangular lid opening.

FIG. 4a,

FIG. 5 a are functional explanations of FIGS. 4 and 5.

Figure 6 illustrates a peeling operation to the point where the pieces of film 7a ^* , 7b ^* begin.

FIG. 7 is a plan view of a closure film 15 'for a cover ring with a substantially round inner opening, the areas of the placement of the edge extensions ("ear-shaped flaps") being illustrated. The general structure of a lid for cans or the like. Container body, consisting of a aufbördelbaren on the body lid ring and the opening tightly closing, peelable sealing film is well known and need not be described in detail here. The essential features of such a lid are shown in FIG. This shows in section and in a perspective view of the cover ring 10, which has an outer fold edge 1 1 for connecting to the Rumpfrand (also called: flanged edge 1 1).

The flanged edge 1 1 passes over a core wall 12 in a center of the lid aligned flange 13 (strip), whose inner edge has a curl 14 which determines the lid opening 15a of the shape and size. As a rule, the shape and size of the lid ring opening are based on the cross-section - size and shape - of the container body.

On the flat portion of the flange 13 is with its edge region the

Closing film 15 (or 1 in Figure 1) by gluing, heat-sealing or the like. Adhesive liquid-tight, but peelable fastened, as indicated by the connecting strip 17 in Figure 2. In order to facilitate the peeling off, an outwardly projecting film strip 3 is formed on the sealing film in FIG. 1 at a circumferential point, which at the same time forms the pulling direction 5 for the film due to its longitudinal extent

Open indicates. This basic construction of the lid applies to all embodiments and will be referred to repeatedly in the following description.

As already emphasized in the introduction to the description, the experience with such lids shows that disturbances occur again and again when removing the sealing foil. Thus, there are peripheral locations along the fastening seam, at which the stripping process is suddenly braked or stopped when the film is peeled off and / or a sudden resistance causes the film edge of the closure film to tear. These defects occur at the different formats and sizes of closure films at often different locations. However, experience shows that these bodies usually have the same position for the same size of the sealing film, the position shifting only slightly with the same size but different sizes.

In-depth experiments have now shown that these disturbances can be largely avoided in a simple manner, without the strength of the material of the sealing film needs to be increased, so that no higher material costs incurred. 1 shows, using the example of a sealing film 1, which is shown for a circular lid opening of medium size, at the recognized from experience points of the film periphery 1 a at least two ear-shaped lobes 7a and 7b, the few millimeters above the outer edge of the strip-shaped connection area. 4 the film (in Figure 2 sealing strip 17) between the film 1 (or 15) and flange 13 of the cover ring 10 outwardly loose, so not glued to the cover ring, projecting. These "ears" are integrally formed extensions of the film beyond its "normal perimeter".

In Figure 2, such an ear-shaped flap 16 (regardless of the size and size of the lid opening 15a) is generally shown. It essentially projects up to the core wall 12, in order not to disturb later machine connection operations between lid edge 11 and - not shown - hull edge. The normal edge (or circumference) of the film 15 is 15b. The edge is extended at the edge points to ears 7a, 7b, which are also called pieces of lobes 16 or pieces of film.

In Figure 1, the edge 1 a of the round cut out closure film. 1

In the example according to FIG. 1, it is assumed that in the case of closure foils for substantially circular lid openings of medium format

(Diameter between 50 mm and 200 mm) are the impurities in the area on both sides of the grip tab 3 and that at an angular distance 8 (or α in Figure 7) of the median plane 6 of the grip tab, which also determines the tearing 5, of about 45 °. In each case, a protruding, ear-shaped piece of film 7a or 7b, which has a substantially rounded or rectangular shape, is formed at the closure film 1. The circumferential width of these pieces of film is selected so that the film piece 7b or 7a covers the respective defect sufficiently far before it is reached when it is torn open and after it has passed.

In Figure 1, the normal edge of the sealing film is denoted by 1 a and the

Connecting strip indicated at 4.

The ear-shaped foil piece 7c additionally recognizable in FIG. 1 should facilitate the positioning or placement of the foil 1 when the foil is applied to the lidding ring. It is placed symmetrically between the film pieces 7a, 7b, the

Grip bottle 3 opposite. About Figure 3 further advantageous embodiments are shown.

A measure for facilitating the peeling is the flange 13a of a lid ring 10a from the lower end of the bead wall 19 rising to the core wall 20 to its lid opening 25a defining inner, rolled-up

Edge 21 a at an angle φ rise.

A preferred range of angles φ is between 5 ° and 25 ° or 10 ° and 25 °, more preferably between 10 ° and 15 °. Shown is an angle of substantially 11 ° (for deviations of ± 10%).

This facilitates the start of the peeling operation and makes it difficult to automatically detach the film 25 from the flange 13a under the resulting internal pressure during sterilization of the sealed container.

A second detail is the possibility, shown in FIG. 3, of arching ear-shaped foil pieces 16a outside the connecting strip 25a in an arcuate manner. This can enhance their function of preventing the occurrence of the above-mentioned incidents when peeling off the film 25 along the sealing strip 17. It is additionally edge-resistant. It covers in the sealed state an opening 25 a of the

Cover ring 10a.

In Figures 4 and 5, the invention will be explained using the example of other forms of the lid opening and thus the closure films. It should be noted, however, that also the position of the tightening direction determining gripping tab 27 or 36 on the location of regularly occurring impurities influence.

FIG. 4 shows a closure film 26 for a lid with a long-oval lid opening. The cover ring is formatted accordingly and not shown. Here, the grip tab 27 is centered on the circular arc portion 26 a of one end of

Foil 26 is formed. At the same time it determines the direction 28 of winding. For orientation in the placement of the film, a tab 31 is formed on the film circumference with respect to the tab 27. The defects occurring in this format are known to be in the tab 27 having bow portion of the film edge and at similar angular intervals 30 as in a circular film

(Figure 1). Therefore, ear-shaped pieces of film 29a and 29b are formed at the corresponding locations, here in a semicircular shape of a respective film piece. In the case of a rectangular lid opening and closure film 35 according to FIG. 5, the grip tab 36 is preferably formed on a foil corner in the diagonal direction 37. Experience shows that when the films are peeled off, the first defects occur on both sides of the grip tab on the film edges 38, 39, namely at locations which have comparable distances from the diagonal, as in the case of the circular or oval films.

Therefore, the film 35 at the appropriate locations ear-shaped pieces of film 40 and 41, here substantially semicircular or trapezoidal. For square or rectangular films, further disturbances may occur at the corner regions at the ends of edges 38 and 39, respectively, starting from the grip tab. That is why at the

Foil 35 two further ear-shaped pieces of film 42 and 43 are provided, which extend around the respective corner area around.

The transmission of the angular range or the preferred angle ranges 8 and 30 from those embodiments which at least half or all round

Shapes for the closure film 26 or 1 or 15 or 25, to those embodiments which are rectangular or square, require consideration by those skilled in the art, which will be explained with reference to Figures 4a and 5a. The transfer of the preferred angular ranges of> 10 ° and <65 °, in particular on the 180 ° angle range in or on which the grip tab is in a square

The area, as shown in FIG. 5, requires a brief consideration, since the center of a circle is not directly fixed here, but becomes evident only in the case of a meaningful consideration.

Figures 4a and 5a are the representation of Figures 4 and 5, unchanged, only with additional auxiliary lines, which allows the transmission of an arc portion of Figure 4a on an angular portion of Figure 5a. The arcuate portion 26a at an end portion of the elongated (long-oval) sealing foil shows that a definition of the center is possible where, for example, the diameter of a hypothetical full circle would be, or the end of the

Arc section 26a is reached, and it goes into a rectangular course.

Here is an angle 30 to the left and an angle 30 plotted to the right, which determines the position of the edge points, and to these the ears 29b and 29a are arranged. In FIG. 5a, there is no arch in the corner area with the grip tab 36, but only two straight edges 38 and 39 which extend from the corner area with the grip tab 36. But there is a diagonal pulling direction 37, which is named as a diagonal and on it lies the center M. The definition of the center point is determined by the intersection of the diagonal 37 with the other diagonal defined by the far corner region 42, assuming a square shape of the closure film 35. This is indicated by the vertical dashed line with the reference "end".

Here, the film edges 38 and 39 are the same length, the other diagonal 37 'passes through the corner 42 (and through the other hypothetical corner top left opposite). The diagonal 37 cuts this Hilfsdiagonale 37 'at the center M, and when the circle or arc K is then pulled through the corner where the grip tab 36 is located, the resulting rays S1 and S2 result as position information for the two ears 40 and 41st

As a result, the angular ranges from FIG. 4 a or FIG. 1 can be transferred to FIG. 5 a, respectively the figure 5 on which they are based.

In the case of the square lid opening, or its associated square shape of the sealing film, the angular distance is dimensioned such that on both sides of the diagonally oriented center line 37 which defines the grip tab, the circle or arc K is provided with a center M which on the other diagonal 37 ', which other diagonal runs as auxiliary diagonal through the adjacent corner regions. Shown is the corner region 42 and assumed is the corner region 42 '. The midpoint is the intersection of 37 and 37 '. The radius R1 of the circle K is selected so that it passes through the corner region which forms the grip tab 36.

The same applies to the rectangular shape, which is shown in addition in Figure 5a. Here, the auxiliary line "end" is not relevant, but the auxiliary diagonal 37 'remains and then it passes through only one corner region 42, is perpendicular to the other diagonal 37, and defined on the circle K a radius R1 so that it through the Corner area runs with the grip tab 36. The

Foil pieces 40, 41 and their position at the marginal edges 38 and 39 are defined as a section of circle K and ray S1, S2.

It should be noted that in the rectangular shape of the sealing film 35, in which the peripheral edge 38 is longer than the peripheral edge 39, the film pieces 40 and 41 do not have the same angular distance from the grip tab 36, but quite the piece of film 40 a larger angle ( over beam S1) can have as the Angular measurement, which is defined by the auxiliary line S2, in particular corresponding or proportional to the length of the peripheral edges 39 and 38, respectively.

In a range of between 10 ° and 60 °, in particular in the upper hemisphere range of 180 °, these angle pieces 40, 41 but also in the rectangular version are arranged (relative to the auxiliary diagonal 37 ').

As indicated by dashed lines in Figure 5, a strip-shaped extension 35a of the film 35 (not shown) may not be provided on their fastening strips (not shown) on a flange of the cover ring, which extends over a substantial or the entire circumference of the film 35. This solution is recommended for unusual formats of the lid opening, for which there is still insufficient experience of the location of the impurities to be expected. However, as far as possible, the specifically intended limited ear-shaped lobes are preferred as locally limited expansions of the film.

Examples of these ears 7a, 7b can also be seen from FIGS. 1a and 1b, which have emerged from the film pieces 7a, 7b of FIG. They have wider peripheral and narrower peripheral boundaries. The wider shape 7a 'approximates a rectangle, the narrower shape 7a "approximates a finger-like shape.

Both forms are also considered "ears" and apply to both foil piece 7a, as well as foil piece 7b as the ears of Figure 1, which are shown there rather semicircular in shape.

It can be seen from FIG. 1 and FIG. 4 that the spaced-apart edge points, on both sides of and beyond (= on both sides) of the grip tab 3 or 27, are situated in an angular range which can be specified as 180 °. This angle range lies on the side of the respective grip tab. In a particular embodiment, the edge points which carry the ears are arranged at least 10 ° away on both sides of the grip tab, but preferably at a larger angle, in the range between 20 ° and

60 ° on both sides of the grip, especially in the area around 30 °. The exact angular position of the embodiment of Figure 1 is at substantially 45 °, left and right of the handle tab 3, and in accordance with the figure 4, the similar angular intervals 30 shows, as in the circular shape of Figure 1.

For the execution of Figure 3, the inclination of the flange 13a was mentioned. The angle was given by phi (φ). The "horizontal" is the horizontal plane (dashed in Figure 3). The mentioned embodiments and areas of inclination of the Flange of the cover ring refer to all preferred areas of the edge locations where the ears are provided as projecting pieces of film, in particular any combination of these areas.

If the pieces of film are only in pairs, especially in pairs in the angular range of 180 ° on the side of the grip tab, a minimum of projecting pieces of film is required. A third piece of film may be provided substantially opposite the gripping tab, but not in the angular range of 180 ° on the side of the grip tab. Furthermore, not more than two of the pieces of film can be provided on this side of the grip tab, however, a third piece of film can nevertheless be arranged on the opposite angular range of 180 °. The latter film piece 7c facilitates the positioning of the film 26 or 1, but does not directly participate in the improvement of the tearing behavior and the elimination of the disturbances occurring during this tearing.

The shape of the foil pieces may be substantially semicircular, they may be substantially rectangular in shape, if they are more pronounced in the circumferential direction, but are nevertheless provided in the circumferential direction limited in their extension. If they are narrower than the semicircular embodiments, finger-shaped formations according to FIG. 1 b result.

Special forms in a direction perpendicular to the circumferential direction is the end-side bulge 16a of Figure 3. The ears as circumferentially limited pieces of film are bulging at the ends, so that they provide greater security against the occurrence of the mentioned incidents, in addition they can be edge stronger.

The projecting pieces of film as ears are preferably integrally connected or formed with the closure film, so that they result in a coherent piece of film, which is already formed in its respective blank as a form with the projecting film pieces as ears, and preferably also the opposite further film piece 7c, which extended the "normal edge" of the sealing film radially ('laterally' in square shapes).

Figure 6 illustrates the peeling operation in a top view, which peeling operation has just arrived at the point where the film pieces 7a * and 7b * commence as shown in Figure 1. At this point is to be expected in this embodiment with disturbances in the tearing process, so that here the gains of the edge region by outwardly projecting pieces of film as Ears 7a ^* , 7b ^{* are} provided. Visible is the pull tab 16, the partially open lid ring opening 15a, the sealing film 15, suitable for folding lid ring outer edge 1 1 of Figure 2 (or 19 of Figure 3), and the Aufziehrichtung 5, transmitted from Figure 1 mutatis mutandis to Figure 2 can be. After the partial opening, the remainder of the sealing strip 17 remains on the flat flange 13 of FIG. 2 or in an inclined form 13 a of FIG. 3.

FIG. 7 illustrates preferred angular ranges.

α (alpha) is greater than 3 °, in particular in the range of 10 ° to about 60 °, preferably between 40 ° and 65 °. γ (gamma) is greater than 1 °, in particular in the range of 5 ° to 20 °. β (beta) is 180 ° minus α (alpha).

The extent x, y of the respective piece of film is dependent on the diameter (generally the area) of the sealing film in the y direction, greater than 0.1 mm in the y direction, and in particular less than 3 mm.

This results in surface dimensions of the projecting pieces of film outside the normal scope of the sealing film, which are between 2 mm ² to 60 mm ² .

This information refers to round sealing foils which have a diameter of between 40 mm and 250 mm.

If a distinction is made between different diameters of the film, which is indicated by R1 as the radius in FIG. 7, the dimensions x and y of the two ears 7a 'and 7b' can be relatively constant, a dimension of essentially 0.7 mm in the x-direction and be provided substantially 10 mm in the y-direction (circumferential direction), whereby they are designed substantially rectangular. These measurements are guidelines, not exact limits.

The angle α varies for increasing diameters, so that it can generally be stated that as the diameter increases, the angle α also becomes larger.

Tests and measurements have shown that the defects are in the following ranges of angles, given with tolerances of ± 15%.

For the above value measurements of the angular dimensions α and the diameter dimensions, in a preferred example all ear dimensions 7b 'and 7a' can have the same absolute size dimensions, essentially 0.7 mm in the radial direction and substantially 10 mm in the circumferential direction. These dimensions are to be understood as guidelines only, not as exact limits.

The dimension R2 results from the above measure R1 and the x-dimension of

Ears 7a ', 7b'. In appropriate training, the third ear 7c 'dimensioned in similar dimensions, based on the circumferential direction and radial direction, only where these extensions of the sealing film does not necessarily have to have the same dimensions as the other two ears, as another functional basis for the ear 7c ' is provided.

In a similar transmission of Figure 2 and Figure 1 to Figure 7 is the outer normal edge of the sealing film 15b ', and the grip tab is designated 3'. The closure film itself is 15 ', based on the sealing film 15 of Figure 2, and the median plane or line 6 of the grip tab.

* * * *

Claims

Claims:

1. Anfalzbarer lid with cover ring, suitable for Anfalzen to a fold edge 5 of a can body, wherein the lid ring (10, 10 a) has an outer fold edge (1 1, 19), which has a core wall (chuck wall; 12,20) and a relative to a horizontal plane preferably inclined mounting flange (13,13a) leads to a cover ring opening (15a); lo - on the mounting flange (13,13a) a closure film (1, 15) is arranged by a thermal seal peelable, wherein the seal extends as a sealing strip (17) along the entire opening (15a) of the cover ring (10,10a) ; the closure film (15, 1) has a grip tab (3; 27; 36, 16) at one location of its edge (1 a, 15 b) for introducing tensile force for carrying out a stripping operation of the closure film, in which the sealing strip (17) is separated; the closure film on each of at least two of the grip tab (3) spaced on each side edge locations an outwardly projecting ear-shaped

20 Lappenstück (16) or each a projecting piece of film (7a, 7b) which protrude beyond the sealing strip (17), wherein the edge locations are selected so as to promote a continuous peeling operation and / or tearing of the sealing film (15,1) at the edge locations with the cloth or film pieces (16, 7a, 7b) to lock inwards or to

25 prevent.

2. Lid according to claim 1, wherein the "spaced edge locations" are located in a 180 ° angle range (30, 8) on the side of the grip tab (3; 27; 36; 16).

3. Lid according to claim 1 or 2, wherein the edge locations are arranged at least 10 ° on both sides of the handle tab 30 away.

4. Lid according to claim 1, 3 or 2, wherein the edge locations with the film pieces (7a, 7b) are arranged in the range of 20 ° to 60 ° on both sides of the grip tab, in particular in the range of 30 ° or 45 °.

5. Lid according to claim 3 or 2, wherein the inclination of

Mounting flange (13,13a) is between 5 ° and 25 °, in particular below 15 °, this is opposite to a horizontal (H), or between 10 ° and 25 ° or between 10 ° and 15 °.

5. Lid according to claim 1 or 2, wherein the film pieces (7a, 7b) are not more than two.

7. Lid according to one of the preceding claims, wherein the film pieces (7a, 7b) or flap pieces (16) are formed substantially rectangular and limited in the direction of the circumference (γ).

lo

8. Lid according to claim 1, wherein the flap pieces (16) are bulged end

(16a).

9. Lid according to claim 1, wherein relative to the handle tab (27,3) in the

Closing film passes another piece of film (7c) or this piece of film radially expanded the normal edge (15b) of the sealing film.

i5

10. Lid according to one of the preceding claims, wherein the pieces of film or

Lobe pieces are integrally (or continuously) connected to the closure film (1, 15).

10a. Lid according to claim 10 or 1, wherein the flap pieces or pieces of film are formed as ears.

20 11. Lid for a can or a container, consisting of one with the

Container edge by crimping or folding connectable cover ring (10) with outer bead (11) and with this by a core wall (12) connected to a cover opening (15a) limiting mounting flange (13) on which a tightly closes the lid opening, but to expose the 25 cover opening peelable sealing film (15) with its edge area through

Bonding or heat sealing in a mounting area (17) is attached; which closure film (15) has an outwardly protruding grip tab (3) at one circumferential location for initiating and executing a stripping operation, the closure film being conveyed over the attachment region (17) at a selected edge region during the stripping operation to promote the stripping process and to prevent the film edge from tearing ) has outwardly projecting ears (16; 7a, 7b, 7a ', 7a "). 1 1 a. Lid according to claim 1 1, wherein the attachment area (17) is a sealing strip.

12. Lid for a can or a container, consisting of a connectable to the container edge by folding lid ring (10) with outer flanged edge

5 (1 1) and with this by a core wall (12) connected, a substantially circular or oval or langovale lid opening (15 a, 25 a) limiting mounting flange (13,13 a) on which a tightly closes the lid opening, but to expose the Is peelable sealing film (1, 15,26) with its edge region (25a) by gluing or lo heat sealing materially secured (4,17), which sealing film on a

Circumferential point, in the case of an oval opening, in particular centrally on an arcuate end region (26a) of the closure film, has an outwardly protruding grip tab (3, 16, 27) for initiating and carrying out a stripping operation, the closure film (1, 15, 26) being used for conveying the peeling process i5 and to prevent tearing of the film edge (1 a, 15 b) during the

Stripping operation (5, 28), at a predetermined or given angular distance (8, 30, α), in particular at an angular distance of between 10 ° and 60 °, on either side of a median plane (6) of the gripping tab - via an attachment region (4, 17) the sealing film on the mounting flange of

20 cover ring - outwardly projecting pieces of film (7a, 7b, 29a, 29b).

13. Lid for containers, with a connectable to a container edge by folding cover ring (10) with outer fold edge (11) and connected thereto by a core wall (12), a substantially square or rectangular lid opening limiting mounting flange on which a

25 lid opening tightly closing, but removable to expose the opening

Closing film (35) is secured with its edge region by gluing, heat sealing or the like. Stoffschluss, which closure film (35) at a corner region in the diagonal direction (37) outwardly projecting gripping tab (36) for introducing and

30 carrying out the peeling operation, wherein the sealing film (35)

- To promote the peeling process and to prevent the tearing of the film edge during a peeling operation (37) at the outgoing of the corner region edges or sides (38,39) - at a predetermined angular distance on both sides of a diagonal (37) oriented

35 Center line of the grip tab - over the attachment area of the

Closing film (35) on the cover ring - outwardly projecting pieces of film (40,41). O

13a. Covering ring according to claim 13, wherein the angular distance is between 10 ° to 60 °.

13b. Lid for containers according to claim 13 or 13a, wherein - in a square

Lid opening - the angular distance on both sides of the diagonally oriented 5 center line (37) is such that a circle or arc (K) with a

Center point (M) on the other diagonal (37 ') is selected by the adjacent corner regions (42), which center is the intersection of both diagonals, and the radius of the circle or arc is selected so that it passes through the corner region with the grip tab (42). 36) runs.

lo 13c. Lid for containers according to claim 13 or 13a, wherein - in a rectangular

Lid opening - the angular distance on both sides of the diagonally oriented center line (37) is dimensioned so that a circle or arc with a center on the other diagonal is selected by the adjacent corner region (42), which center is the intersection of the two perpendicular diagonals i5 on each other, and the radius of the circle or

Circular arc is selected so that it passes through the corner area with the grip tab (36).

14. Lid according to claim 13, wherein each further piece of film (42,43) each in the

Corner region in each case at the end of each of the corner region with the grip tab (36) 20 outgoing side (38,39) of the closure film (35) is provided.

15. Lid according to one of the preceding claims, in which the closure film at each circumferential point at which experience according to a deceleration of the peeling process or a (frequent) tearing of the film edge (1 a, 15 a) 25 occurs, an ear-shaped, beyond the attachment region of the film protruding

Has film piece, in particular depending on an integrally molded piece of film (7a, 7b) protrudes.

16. Lid for a can or a container, consisting of a connectable to the container edge by folding lid ring (10) with outer bead (1 1) and connected thereto by a core wall (12), a lid ring opening (15a) of any outline limiting

5 fastening flange (13), on which one of the contour shape of the opening adapted and this tightly closing, but to expose the opening peelable sealing film (35) is attached to its edge region by gluing, heat sealing or the like., Which closure film at a first edge region after external looper (3,16,36) for initiating and executing the

Having peeling operation, wherein the sealing film for promoting the peeling operation and to prevent the tearing of the film edge during the peeling process over the entire circumference or outer edge of the film reaching beyond its attachment area in addition i5 projecting edge strips (35a).

17. Lid according to one of the preceding claims, in which each ear-shaped lobe piece or over the attachment area protruding continuous edge strip of the film - seen in cross-section - to the outside or top of the film is arcuately shaped (16a).

20 18. Lid according to one of the preceding claims, wherein the flange

(13,13a) of the cover ring (10,10a) extending from the core wall (20) to the lid opening limiting edge (21 a) at an angle (φ) rising.

19. Lid according to one of the preceding claims, wherein the angular distance 25 of at least two projecting film pieces (7a, 7b) of the grip tab (3) is greater than 3 °.

20. Lid according to one of the preceding claims, wherein the radial extent of each of the projecting film pieces (ears) is greater than 0.1 mm, in particular less than 3 mm.

Lid according to one of the preceding claims 19 or 20, wherein each

Pieces of film extending greater than 1 ° in radians.

22. Production of a rollable cover with cover ring, suitable for latching to an edge of a can body, wherein the cover ring (10, 10 a) an outer fold edge (1 1, 19) is formed, via a core wall (12,20) and one opposite a 5 horizontal plane preferably inclined mounting flange (13,

13a) leads to a lid ring opening (15a); a sealing film (1, 15) is thermally sealed onto the mounting flange (13, 13a), the seal extending as a sealing strip (17) along the whole opening (15a) of the cover ring (10, 10a); the closure film (15, 1) has a gripping tab (3; 27; 36, 16) at one location of its edge (1 a, 15 b) for introducing tensile force for carrying out a stripping operation of the closure film, in which the i5 sealing strip (17) is separated; on at least two of the grip tab (3) on each side spaced edge locations depending outwardly projecting ear-shaped lobe piece (16) or each a projecting piece of film (7a, 7b) which protrude beyond the sealing strip (17) 20, wherein the edge points be selected to promote a continuous peeling operation and / or tearing of the sealing film (15,1) at the edge locations with the cloth or film pieces (16; 7a, 7b) inward to lock or prevent.

25

23. A method of operation of a lid with a lid ring, suitable for Anfalzen or folded at one / m edge of a can body, wherein the lid ring (10, 10a) has an outer fold edge (11, 19), which has a core wall (12,20) and a opposite one

30 horizontal plane preferably inclined mounting flange (13,

13a) leads to a lid ring opening (15a); a sealing foil (1, 15) is thermally sealed onto the mounting flange (13, 13a), the seal acting as a sealing strip (17) along the entire opening (15a) of the

35 cover ring (10,10a) extends; the closure film (15, 1) has a gripping tab (3, 27, 36, 16) at one location of its edge (1a, 15b), at the tensile force for the execution of a Abziehvorgangs the sealing film is initiated, in which the sealing strip (17) is separated; on at least two of the grip tab (3) on each side spaced edge locations depending on an outwardly projecting ear-shaped tab piece (16) or depending on a protruding

Has film piece (7a, 7b), which protrude beyond the sealing strip (17), wherein the edge points provide a continuous peeling operation and / or tearing of the sealing film (15,1) at the edge locations with the flap or film pieces (16; , 7b) inward during the

Lock or inhibit removal process.

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