JP2008514511A - Sheet metal lid for beverage cans with large perforations - Google Patents

Abstract

The sheet metal lid (1) has a lid panel (10) surrounded by a folded edge (11). The panel has a large dimensioned opening (15) enclosed by a circumferential strip (16) which is axially offset opposite a plane (E) of the opening surface. A circumferentially and radially extending reinforcement plateau 20) runs along at least one circumferential section of the strip. The reinforcement plateau can be formed sickle-shaped with a central bulge (23) and two circumferentially extending arms (21,22).

Description

  The present invention relates to a lid made of a sort metal for closing a container body, as is well known from beverage cans containing carbonic acid, the contents of which are under increased internal pressure.

  In order to make such containers openable, it is customary to provide a defined area of the lid panel of the sheet metal lid that is destroyed and thus subject to detachment opening by external pressure. Various methods of applying different configurations and release pressures of the fracture open region are known in this way, but in particular, the one described in US Pat. ) Has a trapezoidal lip opening area within a substantially elliptical area limited by. This rolled and folded bend stabilizes the panel. The elliptical area in the fold line is much smaller than 30% of the total panel.

  Also, in other lids, the limited area is originally closed by sheet metal and then separated by the action of lever flaps (tabs) on the weakening line and pressed into a closed container. If the can is designed to represent a lid, both solutions described above are not applicable.

Many solutions in the state of the art relate to the possibility of reclosing beverage cans, especially under external (contamination) pressure and under overpressure in closed containers. Stress due to pressure from both the outside and inside requires a number of properties that cannot be easily matched from sheet metal lid solutions and cannot be useful on small surfaces. Many state-of-the-art solutions that suggest recloseability only achieve this task by losing the can stackability. However, stacking is an inherent property of a closed can that cannot be lost. The can must remain stackable over multiple layers without additional elements that must be added. The can can undergo as little modification intervention as possible while it is closed in order to make it easier to contain the filling with certain or new types of can lids, especially in the area of the sheet metal lid. Basically, the principle of reclosability must thus be different without tabs (usually SOT) located on the lid panel. Thus, the additional free space previously occupied by the tabs is available, this additional space being located directly in the lid plane (slightly above the lid plane).
US Pat. No. 3,361,261

  The object of the present invention is to provide a sheet metal lid for closing beverage cans that facilitates the assembly of separate reclosing devices initially and facilitates its assembly on the sheet metal lid. . The sheet metal lid is as close as possible to its at least outer edge configuration so that the sheet metal lid maintains its pressure stability, does not lose stackability, and keeps the displacement on the filling line as low as possible. It should also be configured so as to be located. However, the resealability of the container should be facilitated by the lid. This is because the iron can body that has been ironed (by DMI) cannot contribute to this solution (possibility of reclosability) due to its original properties.

  This object is achieved by claim 1, claim 2 or claim 32, or claim 33. This lid is manufactured by a method (claim 31).

  The present invention adds to the solution where an additional part (resealing device) is inserted into the “large opening” of the lid panel. This additional part is not only for the purpose of the description of the present specification and in the claims, but such a sheet metal lid is in this case mounted on the filling body as a closure lid by the filler and scraped. Have provided stability, properties and prerequisites to be combined with such reclosure devices.

  It should be understood that the large dimension opening (lid surface) of the panel provides a much larger opening than if the opening was a breakable region as described in the introduction (Claims 1, Claims). 26). They have only small dimensions in order to be able to maintain the stability of the panel.

  In fact, the LOE closure lid is known (large open end), which serves for an enlarged opening, in particular a sip, which is oriented laterally and is configured to reinforce, Nevertheless, not only is it circular due to the need to continue to attach the tabs to the lid sheet metal (via rivets), but this reinforcing shape is located only on one side of the lid axial midplane. See FIG. 9 of WO 97/30803 pamphlet (ANCC).

  If the present invention is used, the opening surface area is increased. The perforations are preferably introduced into the lid. The opening size of the perforations exceeds the center of the lid (Claim 2). Large dimension perforations are not closed by the sheet metal portion and cannot be broken open by the second or weakening line, but remain open to be closed laterally by a reclose device that follows the geometry. It allows opening and closing of the open area (perforation) flow path, so that the large dimension opening, which is free to the drink flow path, is controlled by the reclosing device, but is illustrated here. Refer to the details of PCT / NL2004 / 00024 (International Publication No. 2005/066831 pamphlet) filed on January 13, 2004.

Such a sheet metal lid is a finally shaped sheet metal lid derived from a manufacturing method as previously described (claim 31). It is simply a shell (raw form), which is usually today to replace the conventional SOT closure member according to the second line and to close the body closed thereby in a replaceable manner. Preparations are made for combination with the reclosing member. Similar items are not illustrated in this specification. Because,
This is because they are available by standard.

  An encircling strip biased in one plane is provided around the large dimension opening. This serves for stabilization (claim 1). A radially outwardly stiffening plateau that further contributes to the stiffening of the sheet metal lid is provided along at least one outer peripheral portion of the surrounding strip. Due to the large dimensions, a considerable loss of panel strength can be expected. This is compensated by a surrounding strip and a stiffening surface (stiffening plateau) extending partially around the circumference around the surrounding strip (claim 33). This is obtained by staggering groups of geometric shapes that clearly extend in the circumferential direction.

  The stiffening plateau preferably does not extend further partly along the outer circumference and extends radially. Here, it is oriented flat, in particular in the form of a partial moon or arc segment (claim 3). The stiffening plateau may also be described as having a bulge portion with a larger radial dimension and comprising two arm portions extending along the outer periphery (claim 11). This flat area thus extends at a peripheral angle greater than 180 ° (claim 12).

  Due to the arrangement of the large opening (claims 2, 30, 24) preferably biased to the center, more lid panels remain on one side than on the other side of the opening. Here, the opening extends to come close to the outer circumferential groove. The central deviation is large and is usually circular (claims 24, 21) depending on the diameter of the main opening (in each case in the non-perforated state) from 5% of the diameter of the lid panel It can be in the range of 25%. A range of 10% to 15% is preferable with respect to the diameter of the panel (lid panel) in the outer peripheral groove.

  This bias towards one side makes it possible to give additional stiffness to the other side by means of a partially lunar or arc segment shaped configuration (in short, a half-moon shaped) stiffening plate. It is configured to include an opening of at least 90 °, preferably about 180 °, and also greater than 180 ° relative to the lid panel (claim 12). Due to the bias at the center, a space is defined between one edge of the opening and the outer peripheral groove, and this stiffening portion is arranged.

  On the other side, less sheet metal area remains than the open area defined by the perforations (Claim 30).

  To outline a large opening, it is possible to start with more than 30% of the surface of the lid panel that has not yet been perforated. This dimension relates to the area that is the square of the radius. Where the size of the opening is related to the diameter, the diameter of the opening (for a substantially circular configuration) is greater than 50% of the diameter of the panel, and the same applies to the size of the radius (claim 5). The range of 55% to 65% is preferable (Claim 5). This opening is at least substantially round (claim 28) or at least approximately elliptical. It has a free inner edge (claim 36).

  Further details regarding the flat extension visible in the radial direction of the lid panel reside in the peripheral strip surrounding the large dimension opening and also encompassing the opening between the edge of the opening and the beginning of the peripheral strip More edge strips remain. This edge strip and the previously described perimeter strip lie in the axial direction (perpendicular to the radial extension) on two different levels, also called height, height level, or height position. The axial direction defines a direction perpendicular to the radial direction of the cylindrical coordinates.

  Reference to “inside” and “outside” is avoided for the lid panel. This is because it should be described in the state where it is not arranged on the main body and in the claims.

  Looking at the drawings, “outside” appears to be the top in the drawings, but this is not a limitation on the description of the axial height relationship.

  A further part, indicated as “further intermediate strip” (claim 15), by attaching the stiffening plateau partly along the outer periphery to the opening, which is surrounded by at least one peripheral strip A strip geometry along the outer circumference is possible. It is located between the outer edge of the stiffening plateau and the peripheral groove.

  These further intermediate and peripheral strips preferably have a constant width on their own peripheral extension (claim 16). With the structures extending along the outer circumference and arranged differently, it is possible to vary the height of these structures. This refers mainly to the axial direction of the radial geometry described above (claims 18, 19).

The up-down direction part seen in the cross section can be formed. This ensures that the change in height level results in a stiffening portion that can extend the perforations (openings) throughout the lid panel, despite large dimensions. A step is thus created in each case between two adjacent regions.
This step may be deficient in at least partially diagonally extending pieces. This leads to a specific next structure via a specific radius (claim 20).

  For the height position, the reference plane may be defined as a reference (claim 4), which is arranged in the plane of the perforation, ie in the plane of the opening. Other geometric shapes may be defined at other height positions relative to this reference plane (claims 4, 33).

  In this type of configuration, the lid panel responds to lid swelling at excessive internal pressure, despite standing a “large opening”. Up to the normal pressure and several normal pressures, however, the lid remains stable so that a safe sealing of the first peripheral strip can be achieved by the reclosing device (claim 22). It is located reliably in the same height position (at the same level along its entire circumference) to ensure a sealing function against the sealing lip of the surrounding device. In its own simplicity and sealing, the lid presses onto the outer strip.

  The loss of intensity can be compensated for reliably. The combination of all rigid geometries, particularly the features pointed out in claims 1 and 2, also achieves controlled buckling in the sense of head space enlargement due to increased internal pressure in the closed can. All the requirements shown in the introduction, such as pressure stability, considerable reliance on standard closure, stackability and the possibility of facilitating reclosure are achieved.

  The further edge strip may preferably be located deeper (claim 8) and at a different height than the first peripheral strip (claim 7). The opening for the device may include two opposing flat portions to improve assembly (claim 10). The flat portion extends radially inward (claim 10).

  The flat area height may be higher than the storage surface (claims 13, 4). If the flat area is defined radially inward and radially outward by two peripheral strips (intermediate strip and surrounding strip), the different height levels of these three regions achieve improved stability ( Claims 14 and 18). Preferably, the surrounding strip and the further intermediate strip (Claim 15) can be arranged at the same height (Claim 18).

  The retraction of the further intermediate strip, which extends partly but not completely along the outer circumference, occurs at both ends of the arm of the stiffening plateau, as in the stiffening plateau (claim 17). The lead-in surface (configured in V shape or Y shape) is formed here.

  Preferably, the surface of the partial lunar stiffening (Claim 11) does not have any further beads on its flat extension (Claim 23).

  It is left to say that in order to accept a reclosing device, the modified shell, i.e. the finished product, has a certain opening, also called perforation, which is not covered by sheet metal (claim 21). It does not include scribed or weakened lines (claim 4 (c)). Further, the tab (flap with an open tear) cannot be attached to the sheet metal (claim 4 (a)).

  To compensate for panel stiffening loss, a geometry extending along the outer periphery is used. In the radial direction, ie up and down along the change in height position (level change), especially in the lid area where the large opening is biased (center bias), and a sickle-shaped flat area further Introduced without stiffening or beads.

  The staggered height level change begins with the inner edge strip (around the large opening), through the first surrounding strip, stiffening plateau, further intermediate strip, and ultimately through the peripheral groove From the radially inward to the radially outward, up to the bend or mounting edge. Preferably, diagonal steps are arranged between the stiffening regions extending along the outer circumference over at least 90 °.

  The invention will be described and supplemented below using exemplary embodiments.

  The lid 1 shown in FIGS. 1 and 2 as the first embodiment of the present invention is configured for a conventional beverage can body not shown. As is common practice, the lid is made from sheet metal with low wall pressure.

  The lid comprises a lid panel 10 (as a panel) and a folded edge 11 for connection to a suitable container. Attenuating beads 12 (peripheral grooves) defining the cover panel 10 extend radially outward along the bent edge. The ironed body is generally known and need not be described in detail. Closed by the upper body edge formed radially outward as a flange and the bent edge by a bending apparatus (folding roller), a multiple fold is formed mainly by an injector.

  The bent edge 11, which is also called an “outer peripheral groove”, is arranged on the radially outer side of the attenuation bead 12, and the height position in the axial direction protrudes beyond the lid panel 10. The lid panel 10, which is itself referred to as a “panel”, is configured in a generally cylindrical shape, but is an opening 15 occupying a large portion in size that forms a deletion portion that is a substantially circular perforation in the lid panel. Is still only partially depicted.

  A cylindrical coordinate system is used to draw the extension of the lid panel in the radial direction (horizontal direction) and in the axial direction which is perpendicular to the plane E according to FIG.

  The body itself is not shown. Also not independently shown is a refill device 90 that should be guided into the opening 15 and assembled on the edge of the body.

  The opening 15 in FIG. 1 is shown with a large dimension in the plan view. This opening is arranged eccentrically with respect to its own center point M15 which is offset by ΔM with respect to the center point M10 of the lid panel 10. The amount of eccentricity should be selected to be between 5% and 25% in some embodiments. In the exemplary embodiment, it is in the range of 10% and between 12% and 15% with respect to the diameter d10 of the lid panel 10 extending into the peripheral groove 12. As shown, d10 is twice the radius r10.

  The illustrative diameter of the opening dimension d15 having twice the radius r15 forming the perforation shown herein is smaller than the diameter d10 of the lid panel 10, but is greater than 50% of this opening dimension and occupies most of the opening 15. The dimensions are clearly shown.

  First and second peripheral strips surround the opening 15. The first outer peripheral strip 16a includes two segment-like flat portions 15b and 15a that border the edge of the opening and are on the opposite side. These flat portions serve to improve the assembly of the refill device 90. The second outer peripheral strip 16 has a radial dimension r16 that is larger than the radial dimension of the first outer peripheral strip. The second outer peripheral strip is formed in the height direction above the plane E.

  The plane E is arranged in the height direction in the opening 15 and constitutes a reference for comparing the heights. The plane E is a plane of the opening 15, and the two-dimensional expansion in the plane E forms an opening surface. Plane E describes the dimensions of opening 15.

  The outer peripheral strip 16 transitions into the inner outer peripheral strip 16a via a step 16 'which is arranged gently, in particular at an angle. The raised peripheral ring 16 forms an annular mating support surface for the sealing and closing lip of the reclosing device 90, which is generally at the same level.

  The surrounding strip 16 extends completely around the opening 15 and provides a boundary for the peripheral groove formed on the left side of FIG. On the right side of FIG. 1, this enveloping strip extends around the perforation 15 partially along the outer circumference and forms a restriction for the ridge 20 that is configured in a sickle shape or a part of the moon shape. To do. The surrounding strip is arranged in this area of the lid panel, from which the opening 15 is arranged in a manner offset from the center. The surrounding strip is to the right of the central plane that includes a first axis that extends perpendicular to line AA and through M10.

  The partial enclosure spans substantially 180 ° with respect to the arcuate configuration for the opening 15.

  The outer peripheral extension of the sickle-shaped raised portion 20 is larger than 180 °, particularly in the range of 200 ° to 240 °, and in particular in the range of 210 ° ± 3% with respect to the outer periphery of the lid panel and the outer peripheral groove 12.

  The sickle-shaped ridges are created from two arms 21 and 22 extending along the outer periphery, and constitute both ends of the ridges to be reinforced. This ridge has a barrel 23 that swells between these two ends 21, 22. This body portion has its own largest radius extension portion in the center plane AA, and is tapered so as to draw an arc between both end portions 21 and 22.

  A further intermediate strip 17 having substantially the same width on its own peripheral extension is provided between the ridge 20 and the peripheral groove 12. The outer peripheral extension of this intermediate strip corresponds to the arc extension of the ridge 20 and in any case is greater than 90 °.

  The two peripheral strips 16 and 17 have substantially the same width as shown as r6 and r7 in FIG. These peripheral strips also have the same height with respect to the plane E, as can easily be seen from FIG.

  Both the outer strip 16 and the outer strip 17 are preferably located at a deeper level, slightly above the plane E in FIG. 2, via oblique steps 16 ″ and 17 ″. Transition to an area.

  The edge 20 'of the arc-shaped plateau 20 corresponds to these steps 16 "and 17" and preferably in each case at least one short diagonal part and two radial parts. In any case, overcoming the adjacent area and entering the area. These oblique portions 20 ′ constitute a reinforcing part. Also, the displacement between the higher and lower positions (relative to the highest direction) seen in the radial direction on the “radial vector” (line of sight) from the center M15 also constitutes the reinforcement.

Retraction of the outer peripheral strip 17 into the inner peripheral strip 16 occurs in two retracting regions 17b, 17a immediately adjacent to the arm ends 21, 22 of the flat area 20. The Y-shaped or V-shaped region is formed in these lead-in portions that are wider than the specific band-shaped portions of the outer peripheral band pieces 16 and 17.

  In order to illustrate the dimensions of the opening 15, the radius should be given a reference number. The internal radius r15 of the opening is shown compared to the radius r10 of the lid panel. One or the other radius starts in either case from the center M15 or M10. The radius r15 is thus larger than half of the radius of r10, in particular in the range between 60% and 65% of the main radius of the lid panel above 60%. This describes a large opening. One skilled in the art will recognize by the priority date that the present invention herein is “large” in the optical relationship to the dimensions of the expected break open area of the beverage can lid. If a person skilled in the can field compares the lengths of the radii, it can be said that for r15, “this has been chosen completely large”.

  In terms of surfaces, it is also possible to convert to a surface via a radius (secondary effect), where the surface of the opening 15 is the panel surface 10 relative to the original dimension (without perforations 15). Greater than 30%. Again, the large aperture configuration is approximately about 40%, preferably between 35% and 45% of the non-perforated panel surface.

  Details of these dimensions are also maintained in a bias arrangement centered on ΔM, as seen from the center points M10 and M15. Here, a reference to the diameter d10 (twice the main radius) is useful for dimensional details.

  The central deviation ΔM of various exemplary embodiments, not all shown separately, is between 5% and 25%. These central deviations vary as long as the dimensions of the openings 15 also have gaps and ranges, and the shape of the openings also has gaps and ranges. These gaps and ranges can deviate from a precise circular shape to shapes such as, for example, polygonal or elliptical shapes. These gaps and ranges are at least approximately polygonal or elliptical.

  In the preferred range, ΔM is between 10% and 15%.

  As will be appreciated by those skilled in the art of ordinary can lids, it is a large opening 15 relative to the opening provided or "expected" by the appropriate trader.

  In order to compensate for the loss of stiffness, the geometry described above is used. The top and bottom are made in the radial direction, i.e. the change in height position (change in level), in particular in the region of the lid, the opening 15 is biased (central bias). From and into this region, a sickle-shaped flat surface 20 is introduced without any additional rigidity or additional beads.

  The change in height position is from the inner edge strip 16a (around the opening 15) to the outer peripheral edge 11, via the first surrounding strip 16, the reinforcing plateau 20, the further intermediate strip 17, and finally the outer peripheral bead 12. It occurs from radially inward to radially outward. The diagonally extending steps are placed between these regions as described above using step 20 'of the reinforced plateau 20 (as a substantially flat surface with a large extension). It is preferable.

  The change in the height level of the geometric reinforcing shape portions 16a, 16, 20, 17, 12, 11 can be understood from the sectional view of FIG. Each of the reinforcing shape portions extends in the outer peripheral direction over at least 90 ° as illustrated by the auxiliary line CC. These lines define an angle of 90 ° and all reinforcement features extend beyond this angle in the circumferential direction, reaching 180 ° and even 360 ° for the individual circumferential reinforcement.

  The opening 15 is not covered with sheet metal but is open. The opening 15 comprises a free inner edge 15a. The edge 15a is centered between 5% and 25% (relative to the panel diameter), and the first surrounding strip 16 surrounding the edge is of the same stiffness to support the sealing function. Hold position.

  A further exemplary embodiment according to FIG. 3 follows the first exemplary embodiment with two cross sections AA, BB.

  In the direction BB (center plane) perpendicular to the longitudinal direction, the change in height level also occurs from radially inward to radially outward. Alternatively, with respect to the central plane AA, the opening 15 is symmetric with respect to the transverse direction BB perpendicular to the longitudinal direction. As a result, the left edge and the right edge have the same distance to the outer circumferential groove 12. However, there is no symmetry with respect to the central plane BB. The perforations 15 with the free edge 15a are largely biased towards the first side (this side) of the central plane, so that on the other side (the other side) there is an expanded reinforcing geometry There is a large space.

  The remaining description with respect to FIG. 3 can be inferred from the exemplary embodiment described above.

  The height difference h1 between the outer peripheral strip 17 and the inner peripheral strip 16 is measured with respect to the sickle-shaped flat zone surface 20 located deep with respect to the section AA.

It is a top view of the lid | cover as one of some 1st Examples. FIG. 2 is an axial sectional view of section AA penetrating the lid in FIG. 1. FIG. 5 shows a further embodiment with two axial sections AA and BB over the lid biased by 90 °.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cover 10 Cover panel 11 Edge 12 Water-reducing bead 15 Opening 15a Segment flat part 16 2nd outer periphery strip 16a Further edge strip 16 'Step 16''Step 17 Peripheral strip 17' Step 17a Retraction area 20 'Step 20 Flat area 21 , 22 Arm end 23 Stiffening plateau 90 Re-closure device

Claims (37)

A sheet metal lid (1) for closing a container, such as a beverage can body, under increased internal pressure in a closed state,
The sheet metal lid comprises a panel (10) and a folded edge (11) surrounding the panel, and is configured to cut into an annular edge of the container body;
(A) The panel (10) comprises a large dimension opening (15), said opening being surrounded by a surrounding strip (16), said strip being axial with respect to the plane (E) of the surface of the opening Biased,
(B) A stiffening flat zone (20; 21, 22, 23) extending along the outer circumference and in the radial direction is provided along at least one outer circumference portion of the surrounding strip (16),
Sheet metal lid. A sheet metal lid for closing a container such as a beverage can body and for mounting or assembling a reclosing device (90) under increased internal pressure in a closed state,
(C) The sheet metal lid includes a radial lid surface (10) in the panel or outer circumferential groove (12), and an assembly edge (11) outside the outer circumferential groove (12);
(D) The panel includes an opening (15) whose center is biased with respect to the panel, and the opening dimensions (d15, r15) of the opening (15) are the same as those of the panel (10). Sheet metal lid greater than 50% of diameter (d10, r10). A partially lunar or arcuate part stiffening surface (20, 21, 22, 23) is arranged on one side of the opening (15);
The sheet metal cover according to claim 2, wherein the shape is further separated from the outer peripheral groove (12) by an arrangement in which the center is offset from the opposite side of the opening (15).   The opening (15) stands a reference plane (E) of the lid panel (10), and the bent edge or assembly edge (11) is raised in the axial direction with respect to the reference plane (E), The sheet metal lid according to claim 1 or 2, wherein the outer circumferential groove (12) is located deeper in the axial direction with respect to the reference plane (E).   The size of the opening occupies 30% or more of the surface of the lid panel (10) in the outer circumferential groove (12), and in particular, the diameter of itself is between 55% and 65% of the diameter of the lid panel. The sheet metal lid according to claim 1, comprising:   5. The enveloping strip (16) comprises an inner edge portion having a predetermined radial distance from the outer edge of the opening (15) to form a further inner strip. The sheet metal lid as described.   The sheet metal lid according to claim 6, wherein the further edge strip (16a) is located at a different elevation or plane than the first strip (16).   The sheet metal lid according to any one of claims 1, 2, and 7, wherein the first outer peripheral strip (16) is positioned higher in the axial direction than a reference plane (E) of the opening surface.   9. Sheet metal lid according to claim 6 or 8, wherein the first surrounding strip (16) extends at an angle along the outer circumference of 360 [deg.].   7. Sheet metal lid according to claim 6, wherein at least two opposite surface areas of the further edge strip (16a) are flattened inwardly (15a, 15b).   The sheet metal lid according to claim 1, wherein the stiffening plateau (20) comprises a central body (213) and arms (21, 22) extending along two outer peripheries.   2. The sheet metal lid according to claim 1, wherein the stiffening flat area (20) extends with respect to the outer periphery of the panel (10) at an outer peripheral angle of 180 ° or more, in particular an outer peripheral angle of 200 ° or more.   The sheet metal lid according to claim 1 or 4, wherein the stiffening flat area (20) in the axial direction is disposed above the reference plane (E).   14. A sheet metal lid according to claim 1 or claim 13, wherein the stiffening plateau (20) has a height position located axially deeper than the depth of the surrounding strip (16). Said stiffening plateau (20) is (i) on said or first surrounding strip (16) towards said opening (15), and (ii) a boundary or further intermediate strip (17) towards said peripheral groove (12) The sheet metal lid according to any one of claims 1, 2, and 11, wherein the sheet metal lid is bounded.   16. A sheet metal lid according to claim 15, wherein the further intermediate strip (17) has substantially the same width along its extension.   17. A further intermediate strip (17) on each outer peripheral edge (21, 22) of the stiffening plateau (20) leads into the first surrounding strip (16). Sheet metal lid.   The further intermediate strip (17) and the first surrounding strip (18) are in each case arranged at different axial height positions than the stiffening flat zone (20), both of which are particularly suitable for the openings ( The sheet metal lid according to claim 15, which is arranged higher in the axial direction than the reference plane (E) of 15). In the radial direction, the axial height in each case of the adjacent region extending at least partly in the peripheral groove (16a, 16, 20, 17, 12) is the first enclosure around the opening (15). Over the strip (16), the stiffening plateau (20) or the partial lunar shaped stiffening surface (20), the further intermediate strip (17) and the outer circumferential groove (12), in particular a further edge strip (16a). ) And vary from radially inward to radially outward,
The sheet metal lid according to claim 1, wherein the height level rises and falls.   19. In particular, a transition region in the form of a diagonally extending step (20 ′) in each case is arranged between two adjacent regions (16, 20; 17, 20) in each case. The sheet metal lid according to claim 19.   3. Sheet metal according to claim 1 or 2, comprising an assembly of the opening or reclosing device (90) as a pre-drilling opening (15) in the lid that is not covered with sheet metal for mounting. lid.   The sheet metal lid according to claim 1 or 2, wherein the surrounding strip (16) has a constant height position along its outer periphery.   3. Sheet metal lid according to claim 1 or claim 2, wherein the stiffening flat area (20) is free of further beads or depressions on its flat extension.   The center deviation (ΔM; M10, M15) of the opening (15) is in the range from 5% to 25%, in particular in the range from 10% to 15%, relative to the lid panel (10). The sheet metal lid as described.   25. A sheet metal lid according to any one of the preceding claims, wherein the reclosing device (90) is explicitly excluded.   The sheet metal lid of claim 1, wherein the large opening is typically calculated for a beverage can with respect to expected dimensions and is particularly larger than 305 of the entire non-perforated surface of the lid panel.   A sheet metal lid according to claim 1 or claim 2, wherein a tear open flap is attached to the lid panel (10) that breaks the open area.   3. A sheet metal lid according to claim 1 or 2, wherein the opening (15) is at least circular or elliptical, in particular neither rectangular nor trapezoidal.   The sheet metal lid according to claim 1, wherein the sheet metal lid does not have a score or a weakening line surrounding an open area that can be partially broken.   The size of the opening (15) is such that the opening (15) extends beyond the center of the panel, and the opening surface on the center (M10) side is larger than the remaining panel on the center (M10) side. The sheet metal lid according to claim 1 or 2, which is large. A method of making a sheet metal lid for closing a container, such as a beverage can body, under increased internal pressure in a closed state, the sheet metal lid being folded around the panel (10) and the panel. An edge (11) configured to cut on the annular edge of the container body,
(A) The lid panel (10) is provided with a free opening (15) arranged radially in the outer peripheral groove (12) and extending beyond the central plane (BB) in its axial direction. And
(B) A stiffening flat area (20; 21, 22, 23) extending along the outer circumference and in the radial direction is at least along the outer circumference portion between the outer circumferential groove and the free opening (12, 15). A method of stamping radially in the peripheral groove (12). A sheet metal lid for closing a container, such as a beverage can body, under increased internal pressure in a closed state, said sheet metal lid comprising a panel (10) and a folded edge surrounding the panel ( 11), and configured to cut on the annular edge of the container body,
(A) the panel extends beyond both central planes (AA, BB) perpendicular to each other, the opening is axially offset with respect to the plane (E); and Surrounded by an enveloping strip (16) having a height level that remains the same height across its entire circumference to seal and apply pressure;
(B) a stiffening flat region (20; 21, 22, 23) extending at least along the outer periphery of the surrounding strip (16) along the outer periphery and in the radial direction; Sheet metal lid larger than ° and in particular reaching at least 180 °. A sheet metal lid for closing a container such as a beverage can body and for mounting or assembling a reclosing device (90) under increased internal pressure in a closed state,
(C) The sheet metal lid has a panel (10) in the radial direction within the panel or outer peripheral groove (12), and the assembly edge (11) that can be bited in is radial in the outside of the outer peripheral groove (12). Provided in
(D) The panel has an opening (15, ΔM) whose center is biased with respect to the panel, and the opening dimension (d15, r15) of the opening (15) is large,
(E) The stiffening of the panel region to the greater extent of the remaining sheet metal lid caused by the large dimensions of the openings (15, r15, d15) is staggered stiffening groups (16a, 16, 20) extending in the outer circumferential direction. , 17), and these groups have sheet metal lids having a change in height position so as to create a top and bottom along the radial direction from the inside to the outside.   32. A method according to claim 31, wherein the opening (15) is provided by cutting a perforation.   35. A method according to claim 31 or claim 34, wherein the opening is substantially round.   32. A method according to claim 31, wherein the surrounding strip (16) is stamped around the opening (15) and has a height position where the surrounding strip (16) remains flush over the outer circumference.   The sheet metal according to claim 1 or 2, wherein the free opening (15) comprises a free inner edge (15a), the free inner edge (15) being free of a body web protruding downwards from itself. lid.

Images