CN101107174A

CN101107174A - Sheet metal cover for a beverage can, provided with a large perforation

Info

Publication number: CN101107174A
Application number: CNA2005800327436A
Authority: CN
Inventors: W·卡斯佩尔
Original assignee: Ball Packaging Europe GmbH
Current assignee: Ardagh Metal Beverage Germany GmbH
Priority date: 2004-09-28
Filing date: 2005-09-27
Publication date: 2008-01-16
Anticipated expiration: 2025-09-27
Also published as: DE502005008559D1; ATE449009T1; ES2336811T3; AU2005288913C1; IL182173A0; ES2279294T3; ATE349382T1; EP1640282A1; MX2007003720A; JP2008514511A; BRPI0516206A; US20070215620A1; RU2007107686A; CA2581467A1; EP1640282B1; DE502004002465D1; PL1809542T3; AU2005288913A1; PL1640282T3; IL182173A

Abstract

A sheet metal cover for sealing the body of a beverage enabling a high internally pressurized beverage can to be formed, wherein said cover is embodied in such a way that it is possible to mount an initially separate re-sealable device. The sheet metal cover can also be configured in such a way as to maintain pressure stability. It maintains stackability and it resembles as close as possible a standard shell, at least in the external edge design thereof, such that modifications in the filling line can be kept to a minimum. The sheet metal cover is also provided with a cover panel (10) and a folding edge (11) which surrounds said panel and which is adapted such that it can be folded onto a peripheral edge of the body of the container and is suitable therefor. The panel has a large dimensioned opening (15) which is surrounded by an encircling strip (15) which is axially offset in relation to a plane (E) of the surface of the opening. A reinforcement plate (20; 21, 22, 23) extending in an extensive and radial manner is provided along at least one peripheral section of the encircling strip (16).

Description

The sheet metal cover that is used for beverage can with big perforation

The present invention relates to a kind of lid made from thin plate that is used for the closed container body, the content of described vessel is under closed state under the internal pressure of raising, as disclosed by the jar that is used to contain soda.

In order easily to open this container, in the lid minute surface (panel or cover panel) of sheet metal cover, a restricted zone is set usually, this zone can break and discharge thus by exterior pressure takes opening.Disclose the not isomorphism type that breaks the zone and applied the different approaches of opening pressure at this, mainly be by US-A 3,361,261 (Fraze) disclose has the trapezoidal zone of tearing in oval-shaped basically, this oval-shaped by broken line (16 in the document, 18) at the edge side limited boundary.Described curling broken line makes panel stable.The oval-shaped face of broken line in-to-in is significantly less than 30% of whole front panel.

In other lid, restricted zone is also temporarily sealed by thin plate and the weakened line place that acts on by lever tongue piece (draw ring) separates and is pressed in the osed top container.If want jar, emphasize lid is designed to Reclosable, then can not consider described two kinds of solutions at this.

A plurality of solution of the prior art is devoted to the Reclosable of beverage can, especially externally following the and Reclosable under the internal over pressure of closed container of (targetedly) pressure.The pressure load of both sides is to the solution requirement multifrequency nature of sheet metal cover, and these characteristics are difficult for coordinating and can providing on little face.The a plurality of solutions that produce Reclosable of impelling of prior art all are to realize this Reclosable by the ability of piling up of losing jar.But the ability of piling up be the osed top jar do not allow the primary characteristic of losing.Jar must can be stacked on a plurality of layers in maintenance, and needn't consume add ons.For this jar, the especially interlocking that need change as few as possible when sealing in the zone of sheet metal cover is so that simplify the new-type or later-model cover of employing for can person.Therefore be not provided with under the situation of draw ring (mostly being SOT greatly) on the lid minute surface, the principle of Reclosable must be different in principle.Produce an additional free surface thus, this free surface is occupied by draw ring so far.This added space is located immediately at (a little higher than this panel plane) in the panel plane.

Task of the present invention is, proposes a kind of sheet metal cover that is used to seal beverage can with the assembling of the closing appliance again that allows temporarily to separate and realize this assembling of closing appliance on sheet metal cover again.In addition, design sheet lid makes this sheet metal cover keep its pressure stability like this, makes this sheet metal cover not lose the ability of piling up and at its exterior design aspect in edge shell that is near the mark as far as possible at least, so that make the variation on the canning line keep as far as possible little.But because the jar body of the one of (passing through DWI) ironing can not be made contributions to this solution (Reclosable) owing to its primary characteristic, the Reclosable of storage should be realized by lid.

This task solves by claim 1, claim 2 or claim 32 or 33.A kind of method is made this lid (claim 31).

The present invention proposes a solution, in this solution, auxiliary part (closing appliance again) is inserted in " the big opening " that covers in the minute surface.This auxiliary part should not be the theme of this specification sheets and claims, and only sheet metal cover is only, this sheet metal cover itself produces suitability, characteristic and the precondition be used for this combination of closing appliance again, so as then as closing cap at can person's there suit with turn up on the good body of can.

Large-sized opening in the panel (lid minute surface) should be understood like this: compare with the situation in the described zone that breaks of beginning, this opening provides obviously bigger opening (claim 1, claim 26).Described zone only has relatively little planar stretching, extension, so that can obtain the stability of panel generally.

Though known LOE seal cover cap, this LOE seal cover cap especially provides a bigger opening for Gulp beverage (mostly being beer greatly), this opening laterally is orientated and is configured to the kidney shape, though be not circular, owing to also exist (by a rivet) externally a draw ring to be fixed on essentiality on the sheet metal cover, this kidney shape part also only is positioned at a side on the axial centre plane of lid, referring to WO 97/30902 (ANCC), Fig. 9 wherein.

By the present invention, aperture area is obviously bigger.Perforation of processing in lid, the opening size of this perforation surpasses the center (claim 2) of covering.This large-sized perforation is not sealed and can not be broken along a cutting weakened line yet by sheet member, but keeps opening wide, so that afterwards by having the sealing of closure member again of adaptive geometric type exterior feature portion.This opening and sealing of circulation path in closure member zone (perforation) of allowing to open again, thus, to continue to refer to " the large-sized opening " that is subjected to again closing appliance control ground to discharge beverage flow at this, but at this this closing appliance again needn't be described, to this in detail referring to the PCT/NL2004/00024 (WO-A 2005/068312) on January 13rd, 2004.

Sheet metal cover itself still is a good sheet metal cover of shaping that comes from the course of processing (claim 31).This sheet metal cover is not a shell (blank shape), this sheet metal cover is prepared and closure member combination again, replace the sealing of the common now popular SOT closing cap with score line and Reclosable ground by this SOT closing cap osed top body so that make up with this then, described body is because available and also describe at this according to standard.

Be provided with a ring band that in a plane, misplaces around this large-sized opening.This ring band is used to stablize (claim 1).Be provided with one along at least one circumferential section of this ring band and be positioned at exterior reinforcing platform radially far away, this reinforcing platform additionally helps the reinforcing of sheet metal cover.Since size determine big relatively opening, should consider the big loss of strength in the panel, this loss of strength by the ring band and on the part circumference reinforcing face (reinforcing platform) around the stretching, extension of ring band compensate (claim 33).This point is realized by the geometric type exterior feature portion that a group (series) obviously upwards stretches in week.

Only on the part circumference and in stretching, extension in the radial direction, wherein, this reinforcing platform is orientated the reinforcing platform planarly, especially is configured to (claim 3) of crescent shape or bow-shaped section shape.This reinforcing platform also can be described like this: this reinforcing platform has belly section and two arm sections (claim 11) that upwards stretch in week that radial dimension is bigger.This platform stretches (claim 12) at this with the angle in circular segment greater than 180 °.

Owing to prejudicially big opening (claim 2,30,24) is set, on a side of opening than keeping manyly at the opposite side top cover of faceplate, at this opening of described opposite side more near circumferential groove.With the size relevant (claim 24,21) of the main opening of constructing greatly, being provided with circularly mostly, off-centre can the diameter that covers minute surface 5% and 25% between scope in (respectively under imperforated state) value.Described diameter with circumferential groove in-to-in panel (lid minute surface) is reference, the scope between preferred 10% and 15%.

Described dislocation towards a side (observing from center) can realize: the reinforcing platform of the configuration (" class first quarter moon shape " in brief) by crescent shape or bow-shaped section shape is settled additional reinforcing portion (claim 32) at opposite side.This reinforcing platform ring is wrapping be at least 90 °, preferred about 180 ° and be that reference configuration must be encircled bag greater than 180 ° (claim 12) with the lid minute surface of opening.Between edge of opening and circumferential groove, provide the position that described reinforcing portion is set by off-centre.

On opposite side, keep the little thin plate area (claim 30) of aperture area that constitutes than by perforation.

In order to stipulate " big opening ", can be being departure point greater than 30% of the area of non-perforated cover panel.This size relates to the area that becomes the second power relation with radius.If the size of opening relates to diameter, then the diameter of opening (under the situation of circular in configuration basically) is greater than 50% of the diameter of minute surface, and is correspondingly also like this under the situation that radius is measured.Scope (claim 5) between preferred 55% and 65%.Opening is circular (claim 28) or approximate ellipsoidal at least at least basically.This opening has an internal edge (claim 36) freely.

Be the circumference band about other explanation of observing planar stretching, extension in the radial direction at the lid minute surface, this circumference band surround large-sized opening and between the start-up portion of the edge of opening and circumference band reservation another also surround the marginal belt of opening.This marginal belt and previous described circumference band (perpendicular to circumferentially extending) in the axial direction are on two different level positions, and this level position is also referred to as height or height level or height and position.Axial direction is stipulated the direction perpendicular to radius in cylindrical-coordinate system.

Avoid mentioning " inside " and " outside ", because this cover panel Ying Zaiwei is arranged on the explanation and claimed of getting off of state on the body for cover panel.

As from seeing the figure, departure point should be that " outside " is shown as " top " in fact in the drawings, but this is not illustrated in the restriction of describing axial height relationships aspect.

Green phase is reinforced platform and can be realized band geometric type exterior feature portion on another part circumference settling on the part circumference for the big opening that is surrounded by described at least one circumference band, and this band geometric type exterior feature portion is also referred to as " be with another centre " (claim 15).Described another middle band is being reinforced between flat-bed external margin and the circumferential groove.

Preferred described another middle band has the width (claim 16) that keeps identical with the circumference band in their circumferential stretching, extension.By set different, in the structure that week upwards stretches, the height of the alternation of described structure can be set, this from now on reference to previous mainly at the axial direction (claim 18,19) of the geometric type exterior feature portion of describing in the radial direction.

Observe in the bench section, can form part up and down, described part up and down is responsible for forming reinforcing portion by the height level who replaces, although the large-sized perforation of this reinforcing portion (opening) still can be stretched on whole lid minute surface.Between per two adjacent areas, form a transition region at this.This transition region can have a section of section crustal inclination extension at least as stage, and this section importing in the always nearest structure (claim 20) on corresponding radius.

For height and position, can stipulate a basic plane (claim 4) as a reference, this basic plane is positioned on the plane of perforation, promptly is arranged in the plane of opening.With this basic plane serves as with reference to stipulating other height and position (claim 4, claim 33).

In this configuration, although reduce " the big opening " of stability, lid still obtains high pressure stability and additionally obtains in check " amount of deflection " surprisingly, and this flattens corresponding to the situation lower cover that excessively improves at internal pressure.But up to normal pressure and multi-fold normal pressure, cover aspect its face stability and keep like this, make that can obtain failure-free on the first circumference band by closing appliance again seals (claim 22).It is positioned at (on the identical level position of its whole circumference) on the identical height and position reliably, so that guarantee with respect to the sealing function of the sealing lip of closing appliance again.This again closing appliance on its closed and sealed position, be pressed on the circumference band.

Loss of strength can compensate reliably.All reinforce the combination of geometric type exterior feature portions, especially according to claim 1,2 also acquisition in check " amount of deflection " on the meaning that the head space that the internal pressure by the raising in the osed top jar causes increases of the feature of being emphasized.Beginning to lid, pressure stability, to a great extent the dependence of standard osed top, pile up ability and obtain again all requirements that the osed top possibility proposes and all be met.

Described another marginal belt can be positioned at (claim 7) on the height and position that is different from the first circumference band, be preferably placed at than (claim 8) on the low level.The opening that is used for described device can comprise two leveling portions (claim 10) that are located opposite one another that are used to improve assembling.(claim 10) stretched towards inner radial by these leveling portions.

Podium level can be preferably placed at basic top, plane (claim 13,4).If platform at inner radial and radially outer by two circumference bands (middle band and ring band) limited boundary, the then reinforcing (claim 14,18) that is improved of these trizonal at least two different height levels.Ring band and described another middle band can be preferably placed on the same height (claim 18).

Be not stretch on the full circumferences but as reinforcing platform only as described in stretching on the part circumference in the middle of another remittance of band reinforcing on the flat-bed arm end and carrying out (claim 17).Formed a face that converges of constructing forming V-shape or Y shape at this.

The face (claim 11) of the reinforcing portion of sickle shaped or crescent shape does not preferably have additional flanging part (claim 23) in its planar stretching, extension.

Be to be noted that the shell of modification that is ready finished product has an opening that runs through in order to receive closing appliance again, this opening is also referred to as perforation, but is not covered (claim 21) by thin plate.This opening does not have score line/weakened line (claim 4c).This opening is not settled draw ring (tearing tongue piece) (claim 4a) yet on thin plate.

For the loss of the reinforcing in the compensation panel, use the geometric configuration that on circumference, stretches.Producing up and down partly, be the conversion (horizontal bit map) of height and position that especially in such zone of lid: big opening (prejudicially) comes out from this region shifting and falculate flat surface places this zone under the situation of not having other additional reinforcing portion or additional flanging part in the radial direction along a radiant rays.

The conversion of the ladder form of height and position is carried out from inner radial towards radially outer: marginal belt internally (around big opening), to the first ring band, to reinforcing platform, band in the middle of another, at last by circumferential groove to amounting to or assembling the edge.Upwards surpassing the stage that is provided with the preferred angled extension between the reinforcing area that stretches on 90 ° the scope at least described in week.

Present invention is described with additional by means of embodiment below.

Fig. 1 is as the birds-eye view of the lid of one of a plurality of first examples.

Fig. 2 is according to the axial section A-A of the lid of Fig. 1.

Another example of Fig. 3 lid has axial section A-A, the B-B of 90 ° of two dislocation.

Be determined as the lid 1 shown in first example among Fig. 1 and Fig. 2 and be used for unshowned popular beverage can bodies.This lid is made by the thin plate with thin wall thickness common as common.

This lid has lid minute surface 10 (as panel) and one and is used for amounting to edge 11 with the corresponding container bonded assembly.A buffering flanging part 12 (circumferential groove) that limits the border of covering minute surface 10 at radially outer extends along amounting to the edge.The body of ironing generally discloses and need not explanation.This body has the body edges on a top, this body edges towards radially outer be configured to flange and with amount to edge 11 and seal into a multiple portion of amounting to there can person mostly by device for folding (amounting to roller).

Amount to radially outer that edge 11 is arranged on the buffering flanging part 12 that is also referred to as " circumferential groove " and cover minute surface more than 10 reaching on the axial height.The lid minute surface 10 that itself is also referred to as " panel " is constructed conglobate substantially, but owing to the opening 15 that obviously manifests on its size is partly to exist, this opening forms a hole of circle basically that cuts out of cover in the minute surface.

Adopt cylindrical-coordinate system in order to describe, lid the extending on the radial direction (horizontal direction) of minute surface, and axial direction is on vertical direction or short transverse, promptly perpendicular to the plane E according to Fig. 2.

Body itself and not shown is waited to place opening 15 and closing appliance again 90 that treat to be assemblied in there on the edge does not separately illustrate yet.

Opening 15 size in birds-eye view among Fig. 1 illustrates with being exaggerated.This opening serves as with reference to setting prejudicially with its center M15, and this center is with respect to the center M10 dislocation Δ M of panel 10.Magnitude of misalignment is selected between 5% and 25% in a plurality of embodiment, and in the embodiment shown, each is reference with panel 10 in circumferential groove 12 inner diameter d 10 of extending, and magnitude of misalignment is in the scope between 10% and 12% to 15%.As shown in the figure, d10 is 2r10.

As the penetrating part that in example, illustrates circularly basically at this be the diameter of the example of the opening size d15 of 2r15 diameter d 10 less than panel 10, but greater than 50% of this opening size, this has emphasized the tangible size of opening 15.

One first circumference band and one second circumference band surround opening 15.The first circumference band 16a has two the leveling 15b of portion arc, that be located opposite one another, 15a indirectly with the edges abut of this opening and in inside.These leveling portions are used to improve again the assembling of closing appliance 90.The second circumference band 16 has radial dimension r16, and this radial dimension is greater than the radial dimension of the first circumference band.This second circumference band is constructed to such an extent that be higher than plane E on short transverse.

Plane E is arranged in opening 15 in the horizontal direction and is formed for aspect ratio standard of comparison.This plane is the plane of opening 15, and aperture area is the planar stretching, extension in this internal plane.This aperture area is described the size of opening 15.

Circumference band 16 by a mitigation, especially be in bevelled stage 16 ' carry out the transition to in-to-in circumference band 16a.The circumference band 16 that raises forms a sealing that is used for again closing appliance 90 and sealing is lip, ring-type, be in pressure and areal of support on the identical level position.

Ring band 16 extends and left side in Fig. 1 and circumferential groove adjacency around opening 15 fully.Right side in Fig. 1, this ring band forms and a border that is configured to the platform 20 of sickle shaped or crescent shape, and this platform only centers on opening 15 stretching, extensions and is compressed on the there on the part circumference.This platform is worked in such zone of covering minute surface: opening 15 comes out from this region shifting prejudicially.This platform is positioned at the first axial centre plane right side, and this first centre plane with respect to A-A vertically and pass M10 and extend.

The ring bag of part is to be reference with opening 15, is 180 ° basically under the situation of circular in configuration.

Circumferencial direction and circumferential groove 12 with the lid minute surface are reference, and the circumferential stretching, extension of falculate platform 20 especially is in the scope between 200 ° and 240 ° greater than 180 °, in this is in 210 ° ± 3% scope specifically.

This platform is produced by two arms that stretch in a

circumferential direction

21,22, and these arms form described reinforcing flat-bed end.Reinforce platform and have a belly 23 between these two

ends

21,22, this belly has its maximum circumferentially extending distance and 21,22 shrinks towards the end arcly in the second centre plane A-A.

Be with 17 be provided with another between platform 20 and circumferential groove 12 in the middle of, this centre band has substantially the same width on it circumferentially stretches.Should circumferentially stretch the arc periphery corresponding to platform 20, this circumferentially extends in any case all greater than 90 °.

Two

circumference bands

16 and 17 have substantially the same width, in Fig. 1 respectively mark with r6 and r7.These circumference bands also have substantially the same height and position, can find out without difficulty with respect to plane E in Fig. 2.

Not only circumference band 16 but also circumference band 17 all pass through the stage 16 of preferred angled " or 17 ' carry out the transition to land regions 20, this land regions position that remains at low levels, the plane E among preferred a little higher than Fig. 2.

The edge 20 of arc platform 20 ' corresponding to described stage 16 " or 17 ' and being configured to preferred corresponding bevelled stage, described stage has at least one short angled section and two radiuses that are used to carry out the transition to corresponding adjacent areas.These slopes 20 ' formation reinforcing portion.Equally, the conversion between higher position and the lower position (is with the short transverse with reference to) with and also constitute reinforcing portion investigating to be on center M15 " radial footpath " (radiant rays) in the radial direction.

Exterior circumference band 17 imports in the in-to-in ring band 16 in two

merge area

17b, 17a, and these merge areas are directly adjacent with the

arm end

21,22 of platform 20.Form Y shape district or V-arrangement district at this, these Y shape districts or V-arrangement district are wideer than the corresponding belt shape of

circumference band

16,17.

For the size of opening 15, reference radius are described.The inside radius r15 of opening illustrates with the radius r 10 of lid minute surface with comparing.This or another radius is drawn from center M15 or M10 respectively.Radius r 15 is in this half greater than radius r 10, especially is in more than 60% in the scope between 60% and 65% of main radius of cover panel.This has stipulated a big opening.The professional this break in visually with reference to beverage can cover the zone to priority date usually the size of expectation understand " big ".When jar field professional compared the length of radius, this professional can say without a doubt immediately at r15: " this r15 selected greatly.”

With regard to area, also can be converted into area (second power influence) by radius, wherein, be reference with original size (not boring a hole 15), the area of opening 15 is greater than 30% of panel area 10.At this, the big area of opening also be imperforated panel area about 40%, preferred 35% and 45% between scope.

Described sizing specification also remains in the Δ M accentric scope, and this Δ M off-centre can be found out from center M10 and M15.Here, reference diameter d10 (double main radius) is useful for the explanation size.

Eccentric Δ M is in different embodiment between 5% and 25%, and these embodiment all separately do not illustrate.These embodiment change in this respect: the size of opening 15 has limit and scope, and the shape of opening has limit and scope, and described limit and scope are different from accurate circle, for example can be polygon or ellipse.This is sub-circular or ellipse at least.

In a preferred range, Δ M off-centre is between 10% and 15%.

All these sizes all are used for expressing: with respect to being arranged on this opening common beverage can cover or professional " desired ", relate to the big opening 15 that the professional understands.

For the loss of the reinforcing in the compensation panel, use previously described geometric configuration.Producing in the radial direction up and down partly, be the conversion (horizontal bit map) of height and position that especially in such zone of lid: opening 15 (prejudicially) comes out from this region shifting and falculate flat surface 20 places this zone under the situation of not having other additional reinforcing portion or additional flanging part.

The conversion of height and position from inner radial towards radially outer (with the form of ladder) carry out: marginal belt 16a internally (around opening 15), to the first ring band 16, to reinforcing platform 20, be with 17 in the middle of another, arrive circumferential edges 11 by circumference flanging part 12 at last.Between these zones, be provided with the stage that preferred angled is extended, as before by means of (as smooth basically face) the stage 20 of reinforcing platform 20 ' described with big stretching, extension.

In the section of Fig. 2, can see the conversion of reinforcing the geometric type exterior feature 16a of portion, 16,20,17,12,11 height level.In these reinforcing geometric type exterior feature portions each upwards is stretched at least 90 ° in week, shown in the boost line C-C among Fig. 1.These boost lines have stipulated that one 90 ° angle and all reinforcing portion upwards all far surpass this angle of 90 ° in week, reach 180 ° and for the individual cases of these circumference reinforcing portion even reach 360 °.

Opening 15 is not covered by thin plate, but open wide.This opening has an internal edge 15a freely.This opening (diameter with panel is reference) eccentric and first ring band 16 that surround this opening between 5% and 25% is kept for realizing the identical height and position of sealing function reliably.

Another embodiment according to Fig. 3 copies first embodiment and has two cross section A-A, B-B.

This illustrate: upward also carry out height level's conversion from inner radial towards radially outer at (centre plane) horizontal direction B-B---as the degree that reaping hook part 20 is stretched.Being different from centre plane A-A is reference, and opening 15 is symmetry in a lateral direction, and thus, left hand edge has identical distance with right hand edge to circumferential groove 12.Then exist asymmetric with respect to centre plane B-B.Have internal edge 15a freely perforation 15 this degree move on first side (here) of centre plane, make to go up to produce to be used for the big position that circumference is reinforced geometric type exterior feature portion at opposite side (over there).

All the other explanations to Fig. 3 can be by learning in the previous embodiment.

The diff-H h1 of exterior circumference band 17 and in-to-in circumference band 16 compares with respect to the falculate flat surface 20 that is in than low level according to cross section A-A.

Claims

1. sheet metal cover (1), be used to be enclosed in the container under the internal pressure that is in raising under the closed state, as beverage can bodies, what this sheet metal cover had that a cover panel (10) and one surrounds this panel amounts to edge (11), this amount to the edge adapt to and be suitable for turning up this vessel around the edge on; Wherein,

(a) this panel has a large-sized opening (15), and this opening is surrounded by a ring band (16), and this ring band is with respect to the axially dislocation of plane (E) of the face of this opening (15);

(b) at least one the circumferential section along this ring band (16) is provided with one at the reinforcing platform (20 of stretching, extension that upwards and directly makes progress in week; 21,22,23).

2. sheet metal cover is used to be enclosed in the container under the internal pressure that is in raising under the closed state, as beverage can bodies, and is used for receiving or assembling a closing appliance (90) again, but does not comprise this closing appliance again;

(c) wherein, this sheet metal cover has a panel or a capping (10) and has at this circumferential groove (12) radially outer in a circumferential groove (12) inner radial

An assembling edge (11);

(d) wherein, it is with reference to accentric opening (15, Δ M) with this panel that this panel has one, the opening size of this opening (d15, r15) greater than the diameter of this panel (d10, r10) 50%.

3. sheet metal cover according to claim 2 wherein, is provided with the reinforcing face (20 of a crescent shape or bow-shaped section shape in a side of this opening (15), 21,22,23), this side is more farther from this circumferential groove (12) than the side that is positioned at the opposite of this opening (15) by eccentric setting.

4. sheet metal cover according to claim 1 and 2, wherein, this opening (15) is determined a basic plane (E) of this cover panel (10), and this amounts to the edge or assembling edge (11) improves in the axial direction with respect to this basic plane and this circumferential groove (12) is in than low level in the axial direction with respect to this basic plane.

5. sheet metal cover according to claim 1 and 2, wherein, this opening occupies this cover panel (10) at more than 30% of this circumferential groove (12) in-to-in area on its size, especially the diametrically size determine the diameter of this cover panel 55% and 65% between.

6. according to claim 1 or 4 described sheet metal covers, wherein, this ring band (16) has an in-to-in edge section, and the outward flange of this edge section and this opening (15) has radial distance, is used to form another in-to-in marginal belt (16a).

7. sheet metal cover according to claim 6, wherein, described another marginal belt (16a) is positioned on the height and position or plane different with this first circumference band (16).

8. according to claim 1,2 or 7 described sheet metal covers, wherein, this first circumference band (16) is higher than the basic plane (E) of the face of this opening in the axial direction as the ring band.

9. according to Claim 8 or 6 described sheet metal covers, wherein, this ring band (16) stretches on 360 ° angle in circular segment.

10. sheet metal cover according to claim 6, wherein, at least two face sections that are located opposite one another in described another marginal belt (16a) inwardly flatten (15a, 15b).

11. sheet metal cover according to claim 1, wherein, this reinforcing platform (20) is configured to falculate, has belly (23) and two arms (21,22) that upwards stretch in week at a middle part.

12. sheet metal cover according to claim 1 wherein, is reference with the circumference of this panel (10), this reinforcing platform (20) is greater than 180 ° angle in circular segment, especially stretch on greater than 200 ° angle in circular segment.

13. according to claim 1 or 4 described sheet metal covers, wherein, observe in the axial direction, this reinforcing platform (20) is positioned on this basic plane (E).

14., wherein, be lower than the height and position of the height and position of this ring band (16) on this reinforcing platform (20) has axially according to claim 1 or 13 described sheet metal covers.

15., wherein, be somebody's turn to do or a reinforcing platform (20) according to claim 1,2 or 11 described sheet metal covers

(i) towards this opening (15) with should or one first ring band (16) adjacency;

(ii) towards middle band (17) adjacency of this circumferential groove (12) and another.

16. sheet metal cover according to claim 15, wherein, described another middle band (17) circumferentially stretches along it and has substantially the same width.

17. according to claim 16 or 15 described sheet metal covers, wherein, described in the middle of another band (17) locate to converge in this first ring band (16) in this corresponding circumferential end (21,22) of reinforcing platform (20) (17a, 17b).

18. sheet metal cover according to claim 15, wherein, described another middle band (17) is each positioned on the axial height position different with this reinforcing platform (20) with this first ring band (16), and especially the two is higher than the basic plane (E) of this opening (15) in the axial direction.

19. sheet metal cover according to claim 1 and 2, wherein, in the radial direction, corresponding zone (16a adjacent, that upwards stretch in week at least in part, 16,20,17,12) axial height level difference, especially from inner radial towards radially outer from begin around another marginal belt (16a) of this opening (15) by this first ring band (16), this reinforcings platform or a crescent shape reinforcing face (20), be with in the middle of another (17) with this circumferential groove (12) and different, wherein, these height levels have variation up and down.

20. according to claim 18 or 19 described sheet metal covers, wherein, in per two adjacent arc zones (16,20; 20,17) be provided with between one especially each as the transition region of the stage (20 ') of diagonally extending.

21. sheet metal cover according to claim 1 and 2, this sheet metal cover has as one by the described opening (15) of the opening of pre-punching in this lid, this opening is not covered by thin plate, be used for receiving or assembling again closing appliance (90), wherein, this ring band (16) is configured or is set for this device (90) and seals.

22. sheet metal cover according to claim 1 and 2, wherein, this ring band (16) has the height and position that keeps identical along its circumference.

23. sheet metal cover according to claim 1 and 2, wherein, this a reinforcing platform or a reinforcing face (20) do not have other flanging part or depressed part in its planar stretching, extension.

24. sheet metal cover according to claim 2 wherein, is reference with the diameter (d10) of this cover panel (10), eccentric position (the Δ M of this opening (15); M10, M15) value is between 5% to 25%, especially in the scope between 10% and 15%.

25. described sheet metal cover in requiring according to aforesaid right, wherein, this again closing appliance (90) be definite " not requiring right ".

26. sheet metal cover according to claim 1, wherein, the professional understands, and described big opening is estimated with respect to " usually in beverage can cover desired size ", and especially value is greater than 30% of the non-perforated whole area of this cover panel.

27. sheet metal cover according to claim 1 and 2 wherein, is not settled on this cover panel (10) and is torn tongue piece, tears tongue piece by this and open area can be opened.

28. sheet metal cover according to claim 1 and 2, wherein, this opening (15) is sub-circular or ellipse at least, and especially both non-rectangle was also non-trapezoidal.

29. sheet metal cover according to claim 1 and 2, this sheet metal cover do not have the score line/weakened line of the open area encirclement that can break in a section.

30. sheet metal cover according to claim 1 and 2, wherein, the size of this opening (15) determined like this, and extend and at this side aperture area of this center (M10) panel area greater than this center (M10) remainder over there at the center that makes this opening cross this panel.

31. be used to make the method for sheet metal cover, this method is used to be enclosed in the container under the internal pressure that is in raising under the closed state, as beverage can bodies, what this sheet metal cover had that a cover panel (10) and one surrounds this panel amounts to edge (11), this amount to the edge adapt to and be suitable for turning up this vessel around the edge on, this cover panel (10) wherein:

(a) be arranged on circumferential groove (12) inner radial and be processed with and cross the opening freely (15) that its axial centre plane (B-B) launches in the side;

(b) be suppressed with one at the reinforcing platform (20 of stretching, extension that upwards and directly makes progress in week along at least one circumferential section in this circumferential groove (12) inner radial between the opening (12,15) freely at this circumferential groove and this; 21,22,23).

32. sheet metal cover (1), be used to be enclosed in the container under the internal pressure that is in raising under the closed state, as beverage can bodies, what this sheet metal cover had that a cover panel (10) and one surrounds this panel amounts to edge (11), this amount to the edge adapt to and be suitable for turning up this vessel around the edge on;

(a) wherein, this panel has one and crosses two centre plane (A-A that are perpendicular to one another, B-B) opening of Shen Zhaning (15), this opening is surrounded by a ring band (16), this ring band axially misplace with respect to the plane (E) of opening surface and have one be used to seal with compress purpose around the identical height level of ground maintenance;

(b) at least one the circumferential section along this ring band (16) has one at the reinforcing platform (20 of stretching, extension that upwards and directly makes progress in week; 21,22,23), wherein, circumferentially stretch, especially reach at least 180 ° greater than 90 ° (C-C).

33. sheet metal cover is used to be enclosed in the container under the internal pressure that is in raising under the closed state, beverage can bodies especially, and be used for receiving or assembling a closing appliance (90) again, but do not comprise this closing appliance again;

(c) wherein, this sheet metal cover has a panel (10) and is provided with the assembling edge (11) that can amount at this circumferential groove (12) radially outer in a circumferential groove (12) inner radial;

(d) wherein, be reference with this panel (10), this panel has an accentric opening (15, Δ M), the opening size of this opening (d15, r15) very big;

(e) have in the panel zone of more remaining cover plate by this very big openings of sizes (15, r15, d15) weakening that causes is by one group of reinforcing portion (16a that upwards stretches in week, 16,20,17) offset, these reinforcing portion from inside to outside have the conversion of height and position, so that form part up and down along a radial footpath radially.

34. method according to claim 31, wherein, this opening (15) is by cutting perforation processing.

35. according to claim 31 or 34 described methods, wherein, this opening is circular basically.

36. method according to claim 31, wherein, around a ring of this opening (15) compacting band (16), this ring band upwards has the height and position that keeps identical week.

37. according to claim 1 or the described sheet metal cover of claim 2, wherein, this freely opening (15) have one freely internal edge (15a), especially do not protrude in the contact pin that the quilt of this internal edge bends.