EP1583621B2 - Fixing the position of a pull-tab with an anti rotation bead formed from the panel - Google Patents

Fixing the position of a pull-tab with an anti rotation bead formed from the panel Download PDF

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Publication number
EP1583621B2
EP1583621B2 EP03808250A EP03808250A EP1583621B2 EP 1583621 B2 EP1583621 B2 EP 1583621B2 EP 03808250 A EP03808250 A EP 03808250A EP 03808250 A EP03808250 A EP 03808250A EP 1583621 B2 EP1583621 B2 EP 1583621B2
Authority
EP
European Patent Office
Prior art keywords
sheet metal
projection
metal lid
lid according
panel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03808250A
Other languages
German (de)
French (fr)
Other versions
EP1583621B8 (en
EP1583621A2 (en
EP1583621B1 (en
Inventor
Hajo Rieck
Richard Chalk
Martin Gray
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ardagh Metal Packaging Germany GmbH
Original Assignee
Ball Packaging Europe GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=32773135&utm_source=***_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1583621(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from DE10300914A external-priority patent/DE10300914B4/en
Application filed by Ball Packaging Europe GmbH filed Critical Ball Packaging Europe GmbH
Publication of EP1583621A2 publication Critical patent/EP1583621A2/en
Application granted granted Critical
Publication of EP1583621B1 publication Critical patent/EP1583621B1/en
Publication of EP1583621B8 publication Critical patent/EP1583621B8/en
Publication of EP1583621B2 publication Critical patent/EP1583621B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
    • B21D51/383—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures scoring lines, tear strips or pulling tabs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
    • B65D17/401—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall
    • B65D17/4012—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall for opening partially by means of a tearing tab
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001—Details
    • B65D2517/001—Action for opening container
    • B65D2517/0014—Action for opening container pivot tab and push-down tear panel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001—Details
    • B65D2517/0058—Other details of container end panel
    • B65D2517/0068—Ribs or projections in container end panel
    • B65D2517/0071—Ribs or projections in container end panel located externally of tear-out/push-in panel or preformed opening
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S220/00—Receptacles
    • Y10S220/906—Beverage can, i.e. beer, soda

Definitions

  • the invention relates to a metal lid and thereby with a formation of a position fixing a grip tab on a metal cover for attachment to a hull of a beverage can, even by way of a method.
  • the JP-A 09/226 762 uses a similar projection in the area inside the rivet island, whose upwardly curved, deformed with a further step edge regions (there 17) via a "press-bond" with the curved wall side of the projection are overlapping connected to a turnstile to reach the side wall to prevent rotating the tongue part).
  • the invention is faced with the technical problem of achieving a turnstile tab, but to improve the manufacture and reliability of the turnstile or a positional alignment of the mounted grip tab.
  • the projection may be strip-shaped (line-shaped) and preferably oriented transversely and / or parallel to a longitudinal extension of the grip tab (longitudinal axis or longitudinal plane), wherein it engages on a correspondingly aligned edge edge of the attachment portion for its blocking effect or is formed very closely adjacent , In a longitudinal extension, the projection may extend over more than 30%, preferably over more than 50% to more than 80% of the width of the attachment lobe (claim 5).
  • the longitudinal extent is shorter than the longitudinal extent of the attachment tab (rivet island) of the handle tab, preferably at a location as far as possible from the attachment point with a large distance, but the is only so large that at least a portion of the two edge lines on the at least one projection at a start of a rotational movement is able to abut (claim 6).
  • the height extension of the at least one projection is to say that they should at least correspond to the sheet thickness of the attachment portion (claim 19, claim 20), preferably slightly to significantly higher trained to obtain a reliable positional fixation, which is not affected thereby that the grip portion is actuated or raised after the attachment portion beyond the attachment point is reliably located in a plane position to the panel portion in the vicinity of the rivet (button coin area).
  • the provision of a plurality of projections is possible, wherein not all projections must be assigned to the same outer edge section of the fastening section (claims 6 to 9).
  • the projections can also be designed differently, so strip-shaped, round to oval or combined. If a straight-line outer edge portion of the attachment portion is provided, a straight-line (strip-shaped) projection configuration may be advantageous.
  • the linear strip design can also be achieved by juxtaposing at least two punctiform projections, which then form a group which is assigned to the same outer edge of the attachment section.
  • the attachment portion as a fastening tab is connected via a kink area as joint line with the rest of the grip tab, so in one piece (claim 13, 11). It is thus formed between the opening portion (the insertion nose) and preferably provided with an opening handle portion.
  • the mounting portion is substantially rectangular, forms using the hinge line and three edge lines of the substantially rectangular, flat mounting portion of (claim 12).
  • this flat section is square, wherein the rivet head after assembly does not come to rest centrally but closer to the joint line. Accordingly, the distance of the outwardly facing peripheral edge is greater than half the longitudinal extent of the attachment portion, so that a correspondingly improved force effect arises when a projection on the panel can be assigned to the edge furthest away from the attachment point.
  • At least one unbalanced in cross-section projection which is formed steeper at its flank pointing to the mounting portion than the flank remote therefrom (claim 17, 18 and 22 or 23).
  • Such a design can also be selected with punctiform or oval projections.
  • a thickness reduction of an upper side of the (strip-shaped) projection (claim 22) preferably takes place. This results in solidification of this portion and the entire projection as such as well. This also applies to the method (claim 35). Simultaneously with the reshaping and the score line can be introduced in the same operation (claim 37).
  • the invention claimed here covers the formation of the projection at such a location, which is far enough away from the intended attachment point (the molded rivet or its preform) so far that the outer edge comes in the form of a rivet island facing away from the future rivet edge very close to the projection to make the turnstile effect.
  • This space is visible in the outer edge region of a Nietkopf-courtes or "Nietfußes", which remained around the formation of the rivet center from the preform of the rivet visible (claim 24 to 28, claim 32).
  • the projection as a line or strip lies at least partially outside the weakened Nietfuß Schemes in which the sheet is thin by the shape of the attachment point.
  • the edge region of this Nietfußes is addressed (claim 25), wherein preferably more than 40% of an assumed area of a strip-shaped projection outside the Nietfuß Schemees are (claim 26).
  • a strip shape is provided as a projection, it can be made larger in its length than the diameter of the finished rivet head.
  • the attachment portion is formed from one piece of the center region of the grip tab, there are only slight visible gaps between the mounted over a double fold line down to a lower level mounting portion and the slightly above parallel plane of the remaining grip tab.
  • the attachment of the projections on at least one of the free, from the attachment portion facing outward marginal edges is therefore difficult or difficult to see from the outside, so that the rotation block is almost invisible to the viewer.
  • a possibly color-coded grip tab is not changed further in its colored form.
  • the in Figure 1 to 3 resulting sheet metal lid clearly has an edge portion 12 which is suitable for folding to a beverage can body.
  • the sheet metal lid itself is made of a sheet of small thickness, usually less than 0.24 mm, and has already undergone previous workstations before FIG. 1 represents him. It has an inner lid mirror (panel) 10, which is surrounded by the seam edge 12. Within the lid mirror 10, a line of weakness 16 is provided around an opening area which is surrounded by a substantially U-shaped bead 18.
  • the substantially O-shaped line of weakness 16 is designed as a score which has a transition portion which is not notched is and thus serves as a connecting portion to the rest of the panel 10 when the opening portion 17 is broken by the action of a later mentioned grip tab along the score line 16.
  • an attachment point 11 is provided, which can be seen later in the enlarged detail later. It is a mounting portion as sheet metal tabs 31 associated schematically, the part of the grip tab after FIG. 3 is at which he is integrally formed over a joint line as a bending line 38.
  • This grip tab 30 has a handle portion 32, here provided with a circular opening at which the grip tab is actuated by the user, for breaking the score line 16 after FIG. 1 ,
  • the grip tab 30 also has an opening portion 33 in front of the attachment portion 31, which is located as a nose for collapsing over the burglary portion 17, to which FIG.
  • an additional bead form 18a is provided as an eyeball-shaped bead, which reinforces the transverse LOE opening area in order to be able to apply the opening forces to the burglary starting section (arcuate end of the score line 16).
  • the arranged grip tab 30 is substantially parallel to the panel, which itself need not be formed exactly in a plane, but may be slightly curved, but the area around the attachment point 11 is substantially planar and here allows a substantially parallel arrangement of the attachment tab 31 of the pull tab 30.
  • longitudinal center plane 100 is shown, which extends in the direction of the longitudinal extent of the grip tab 30.
  • a transverse plane 101 is perpendicular thereto.
  • the grip portion 32 of the grip tab engages over the finger recess 13, which is mounted approximately the same distance as the inner reinforcing rib 18 a on the other side of the attachment point 11 in the panel 10.
  • the grip tab is in the course of the emergence of the finished metal lid only in the FIG. 3 appropriate.
  • the attachment point is first formed as a bubble in order to attach the attachment portion 31 of the handle tab 30 to the panel can.
  • Around this attachment point 11 are around according to FIG. 1 three strip-shaped projections formed as beads projecting upwards (ie to the outside of the sheet metal lid).
  • the bead 20 lying transversely to the center plane 100 is longer than the two adjacent beads, which run parallel to the center plane 100. They are in FIG. 4 illustrated with 21a, 21b illustrated, as there, the longer bead 20 is shown in more detail with respect to the attachment tabs 31.
  • the attachment tab 31 is in the FIG. 1 located only to illustrate the distances of the beads of the attachment point 11, but is not yet here on the sheet metal lid.
  • the shape of the three beads 20,21a, 21b is improved or made more accurate. This "reforming" leads to a formation of the beads (protrusions), as they later for the positional fixation FIG. 3 and the figures described below is used.
  • these projections receive their correct profile geometries after they have been integrally molded out of the cover sheet (the panel) and extend in the height direction h at least at a height corresponding to the sheet thickness of the attachment portion 31 of the grip tab 30.
  • this grip tab 30 when this grip tab 30 is added, it is placed over the rivet shank, which is formed in a molding operation with a rivet head, wherein it is shown larger in diameter than in the preceding Figures 1 and 2 , With this Nietkopf Struktur the grip tab 30 is attached to the panel and that on the mounting portion 31, which is connected via the fold line 38 with the rest of the handle tab 30.
  • the opening portion 33 lies above the break-in portion within the score line 16, close to the additional stiffening bead 18a.
  • the grip tab 30 should not be able to move in a direction of rotation in FIG. 4 is named with ⁇ .
  • the front nose end of the opening portion 33 would be moved away from the exact location intended to ensure the breaking force, the tearing and the subsequent complete opening of the opening portion 17. Desirable it is after FIG. 4 that is, to design the movement ⁇ as small as possible, preferably even to suppress it altogether.
  • FIGS. 1, 2 and 3 three strip-shaped projections 21 a, 21 b and 20 are provided, which are assigned to the three free marginal edges 31 a, 31 b, 31 c of the attachment portion 31 of the handle portion 30.
  • a small gap 21 ', 21 "and 20' can remain between the respective outwardly facing edge and the respective inner edge of the respective projection, for example. 31 c of 20" in the projection 20.
  • the gap can also on at least one of outwardly facing edges of the attachment portion 31 may be reduced to zero.
  • the width of the attachment portion 31 is designated by "b", so that the minimum distance of the two lying parallel to the longitudinal center plane 100, formed as beads projections 21b, 21a have this measure with their inner edges 21b 'and 21a' as a distance.
  • the longitudinal extent of the mounting portion 31 in the plane 100 extends over the rivet head as an attachment point 11. It can be seen that the length of the two beads 21 a, 21 b is shorter than half the longitudinal extent of the attachment piece 31, and that this so far are displaced as possible in the rear portion of the mounting portion to apply the maximum possible force for a positional fixation with an assumed rotational movement ⁇ .
  • one or more of the three described strip-shaped beads can be omitted.
  • the pivotal movement is substantially in the plane in which the panel is located in the area around the rivet head 11, which plane is also maintained plane-parallel of the attachment portion 31, which extends here flat.
  • the portion 31 has two parallel marginal edges or edges 31b, 31a and a remote from the hinge line 38, and their parallel edge edge 31 c.
  • the attachment portion in the form of an arcuate shape, triangular shape or with a not straight extending peripheral edge 31 c.
  • FIG. 4a shown cross-section comes from the corresponding section line of FIG. 4 ,
  • an asymmetrical configuration of the strip-shaped projections 21 a, 21 b is provided, wherein a steeper flank 21 b 'is closer to the peripheral edge 31 b than the flatter flank 21 b "of the strip-shaped projection 21 b a and the associated peripheral edge 31 a.
  • FIG. 5 Also to FIG. 5 is a cross section in FIG. 5a represented, which is laid through the longitudinal plane 100.
  • This illustration shows the described situation for only one projection 20, which cooperates with the marginal edge 31c of the attachment section 31, to avoid function-impairing rotational movements ⁇ .
  • FIG. 5a In the FIG. 5a is to see the formation of the rivet head as an attachment point 11 through an opening of the attachment portion 31 therethrough. Also recognizable is the assignment of the free edge 31 c to the formed from the cover plate projection 20, which also - like FIG. 4a for the other projections 21 b, 21 a clarified - may be provided in unbalanced shape.
  • the asymmetry transverse to the longitudinal extent of the projection 20 illustrates the FIG. 8 , based on the projection 20, which is associated with the peripheral edge 31 c of the attachment portion 31. Due to the double deformation, the first shaping after FIG. 1 and the second reforming after FIG. 2 a very steep leading edge 20 "or 20a can be formed, a very high height h (relative to the sheet thickness), and the cover sheet still remain undamaged, which also contributes that the projection is as far away from the sensitive area of Niethofes 11 a. Due to the sharp front edge 20a (or 20 "from FIG.
  • FIG. 8a In which an implementation in the section is shown, wherein the section extends in the longitudinal direction, as dictated by the longitudinal mid-plane 100, for example, from the illustration of FIG. 5 and - practically realized - the schematic representation of the FIG. 8 corresponding.
  • FIGS. 4, 5 and 8th Designate corresponding sections and parts there, they are in realization FIG. 8a taken over, here in the lower illustrated field.
  • the upper illustrated field forms a preform 20 * which is formed in a two-stage manufacturing process prior to the second step (post-forming).
  • the preform 20 * which has a rather wall-shaped structure, is formed with two flat slopes and a strongly rounded central portion of the panel 10.
  • FIG. 2 creates the much steeper leading edge 20 "(after FIG. 4 ) or 20a after FIG. 8 , wherein the cover sheet still remains undamaged.
  • This second reshaping and the result after attaching the handle portion shows the lower field of the FIG. 8a , It is understood that in both the upper and the lower field of the strip-shaped projection 20 extends perpendicular to the paper plane, in a transverse plane 101 which is perpendicular to the longitudinal center plane 100.
  • This transverse plane 101 is a relative indication of the position of the preform 20 *, in which there is a symmetry of the initially formed preform from the cover plate to the plane 101, which is then left at the post-forming, as the finished projection 20 shows that in the lower half in which it is no longer located symmetrically to the transverse plane 101.
  • the following explanations refer to the lower field.
  • the rivet 11 which is used to attach the attachment portion 31 on the cover plate 10.
  • the rear end 31 c of the attachment portion 31 is the marginal edge, which is associated with the leading edge 20 "of the projection 20, possibly leaving a narrow gap 20 ', as with reference to FIG FIG. 4 explained.
  • the asymmetry with a sharp front edge 20 "(or 20a) and a flatter, outwardly facing edge 20b characterizes the projection 20.
  • the reshaping involves shaping reshaping the preform 20 * with a coining (embossing process) to flatten the surface 20c more strongly.
  • a coining embssing process
  • the tool is used equally from above and from below for training. It can be seen from the left in the rising edge of the preform 20 * recognizable slight kink in the lower final shape again, which also shows how the sharp leading edge 20 "is introduced into the first flat rising front slope of the molded wall 20 * To the right of the transverse plane 101, the second slope of the wall is formed from below to above, to form a flat shape 20c starting approximately at the instep of the wall 20 *, which smoothly leads into the remaining cover plate 10 in the area 20b.
  • the attached attachment portion 31 and also the attached tab 30 are already in the finished form FIG. 3 arranged, also in section.
  • the tab lies with its intermediate web between the left opening and the handle opening 32b substantially above the transverse projection 20.
  • the two openings of the tab are made FIG. 3
  • an opening is formed by the formation of the attachment portion 31, which continues to communicate with the grip tab 30 via the hinge line 38, while the opening for the engagement of a finger is specially formed.
  • This opening 32b is part of the handle portion 32, wherein the web 32a lying between the two openings in FIG. 8a is shown slightly curved, with a front edge 32c, which was related to the free edge 31 c of the mounting portion 31 in the manufacture.
  • a large part of the projection 20 is thus below the bridge and is hardly noticeable from the outside.
  • the two-stage training may be in addition to the order of processing according to the FIGS. 1 to 3 also a modified order are made, so first the introduction of the preforms, as they are based on the preform 20 * of the upper half of FIG. 8a are explained, in a first operation, still without introducing scoring or score lines (as lines of weakness), as the line of weakness 16 is a.
  • scoring or score lines as lines of weakness
  • the line of weakness 16 is a.
  • the introduction of the first score line then takes place together in one operation, which takes over the reshaping (further forming) of the preformed protrusions.
  • the projections receive the correct, their assigned profile, as in the lower half of the FIG.
  • this profile can be transferred not only to the transverse projection 20, but also to the other projections, as far as they were formed in the previous operation as preforms. It can thereby be achieved that a notching process which greatly stresses the sheet metal does not already take place when the cover sheet undergoes a heavy loading of the preform in the first operation.
  • reshaping the insertion of the score line can be made at the same time.
  • the wall thickness on the top of the projection reduced by about 10% to 15%, with simultaneous entering compression and solidification of this area, which is equally achieved by the embossing process (the Coining) from above and below.
  • FIG. 6 shows an attachment of two substantially punctiform projections 23a, 23b on the longitudinal sides 31a, 31b of the attachment portion 31.
  • a projection 22 may be provided on the transverse edge 31c of the attachment portion 31.
  • the projection 22 may be elongated to oval and also formed substantially round.
  • FIG. 7 Fig. 11 illustrates a group of protrusions associated with a single outer edge (outwardly facing edge line) of the attachment portion 31.
  • This group 24 of here three individual, substantially point-shaped projections are associated with the outer edge 31 c, but may also be associated with the two other marginal edges 31 a and 31 b. Also only two point-shaped projections are in FIG. 7 used.
  • the unbalanced shape of the upwardly shaped projections according to FIG. 4a or the FIGS. 5a or 8a be transferred to these embodiments.
  • the at least one projection is associated with a peripheral edge 31c lying transversely to the longitudinal plane 100 of the attachment tab 30, rotational movement in both directions can be prevented with only a single projection, if this projection extends at least on both sides of the median plane. If, on the other hand, a projection is selected which is assigned to a peripheral edge extending parallel to the longitudinal plane 100, at least two projections on two edges available to this extent must be provided as "stop edges" for a symmetrical limitation of rotary movements of the grip tab 30.
  • All described projections are arranged outside of the mounting portion 30, so that they with at least one of its respective outer peripheral edges (edge) can work together blocking.
  • FIGS. 9a and 9b The effect of the torques is on the FIGS. 9a and 9b illustrated. It is assumed with a view from above of the mounting portion 31 that this is arranged on the attachment point 11 (usually a rivet head) on the panel 10. Schematically, a parallel to the center plane 100 of the tab (the handle tab 30) lying lateral projection 21a is drawn, which is loaded with a force by an assumed rotation in the direction of ⁇ . With an assumed length I of the attachment portion 31, the attachment point 11 is closer to the hinge line 38 than to the rear end 31c of the attachment portion 31, so that an effective force arm I 1 is greater than half the length I of the attachment portion 31. Due to the placement of the line or strip-shaped projection 21 a near the rear edge line 31 c, a force on a large lever arm can apply a large torque to lock (blocking torque) to prevent rotation.
  • FIG. 10 illustrates a thinned area visible around the rivet head 11 from the inside of the lid.
  • This rivet base portion 11a is a portion left after the second forming of the rivet head 11 on the outer side, usually visible by circular lines around the center of the rivet as the attachment point 11 around.
  • This "button coin area” is not strong load, after it is thinned out of the sheet thickness by the shaping of the rivet to the outside.
  • the attachment section 31 is shown by dashed lines, not to scale, in order to clarify the relation of the position of the "Coin Area".
  • the two lateral projections 21 a, 21 b may be provided here, which are then placed near the periphery of the Nietfußes and are not placed in the vulnerable thinned area near the rivet head ,
  • a more accurate dimensioning of the surfaces shows that the strip-shaped projection 20 is situated at least partially outside the rivet foot area (Coin Area) and here the outer periphery area 11b.
  • the relocation is at least 40% of the area f 20 , which is no longer in the periphery 11 b of the Nietfußes 11 a, but outside.
  • this location and the location and extent of the Coin Area can be seen easily from the inside of the tin lid.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Closures For Containers (AREA)
  • Package Frames And Binding Bands (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)

Abstract

The invention relates to a positional fixing of a tab on a sheet metal lid comprising a panel (10) and a seamable edge (12) surrounding said panel, suitable for attaching to a can body. On the panel (10), an openable area is defined by a weakening line (16), and outside said openable area (17), a tab (30,31,32,33) is provided at a mounting place (11). Said tab (30) comprises a grip portion (32), an opening portion (33), and an attaching portion (31), said latter being provided for attaching said tab substantially parallel with respect to said panel (10). Said tab (30) as attached is disposed with its opening portion (33) above said openable area (17). Close to at least one edge (31c) of the attaching portion (31), a strip-shaped projection (21a, 21b, 20) is shaped to protrude out of said panel (10), for limiting a pivoting movement (α) of said tab (30) around said mounting place (11).

Description

Die Erfindung befasst sich mit einem Blechdeckel und dabei mit einer Ausbildung einer Lagefixierung einer Grifflasche an einem Blechdeckel zur Anbringung an einen Rumpf einer Getränkedose, auch im Wege eines Verfahrens.The invention relates to a metal lid and thereby with a formation of a position fixing a grip tab on a metal cover for attachment to a hull of a beverage can, even by way of a method.

Im angebrachten Zustand der Grifflasche an dem Blechdeckel spricht der Fachmann von einem SOT (Stay on Tab), der zum Öffnen eines Öffnungsbereiches im Deckelspiegel (zumeist "Panel" genannt) vorgesehen ist. Dazu wird mit einer vertikal orientierten Kippbewegung, angefasst an einem Griffende, die Grifflasche angehoben, um mit ihrem Öffnungsende den Öffnungsbereich entlang einer Schwächungslinie (zumeist score-line genannt) aufzubrechen.In the attached state of the grip tab on the metal lid, the person skilled in the art speaks of a SOT (Stay on Tab), which is provided for opening an opening region in the cover mirror (usually called a "panel"). For this purpose, with a vertically oriented tilting movement, touched on a grip end, the grip tab is raised in order to break open its opening end along a weakening line (usually called score-line).

Besonderes bei großen Öffnungen (LOE, large opening ends) als Öffnungsbereich ergeben sich im Stand der Technik Schwierigkeiten, eine Position der Grifflasche im am Blechdeckel angebrachten Zustand zu fixieren. Dazu sind bereits Vorschläge gemacht worden, bspw. aus der US-A 5,799,816 (Schubert ). Dort wird eine Durchbrechung eines Anbringungs-Abschnitts der Grifflasche vorgeschlagen, welcher Anbringungsabschnitt zumeist "rivet island" genannt wird. Dieser Anbringungsabschnitt wird über einen ausgeformten Niet an dem Panel des Blechdeckels befestigt und übergreift dabei mit einer ausgebildeten Öffnung im Anbringungsabschnitt eine rund bis länglich ausgeformte Sicke, die auch nach dem Befestigen der Grifflasche eingeformt werden kann, vgl. dort Spalte 3, Zeilen 63-67, Spalte 5, Zeilen 37 bis 44, dortiger Anspruch 3 und die zugehörige grafische Darstellung in der dortigen Figur 2 und 4.Especially in the case of large openings (LOE, large opening ends) as the opening area, difficulties arise in the prior art in fixing a position of the grip tab in the state affixed to the sheet-metal lid. For this purpose, proposals have already been made, for example. From the US Pat. No. 5,799,816 (Schubert ). There, an opening of a mounting portion of the handle tab is proposed, which mounting portion is usually called "rivet island". This mounting portion is attached via a molded rivet to the panel of the sheet metal lid and engages over this with a trained opening in the attachment portion a round to oblong shaped bead, which can be molded even after the attachment of the grip tab, see. there column 3, lines 63-67, column 5, lines 37 to 44, there claim 3 and the associated graphical representation in the local FIG. 2 and 4 ,

Die JP-A 09/226 762 (Hokkai Can) verwendet einen vergleichbaren Vorsprung im Bereich innerhalb des rivet island, dessen nach oben gewölbte, mit einem weiteren Arbeitsschritt verformte Randbereiche (dort 17) über ein "press-bond" mit der gewölbten Wandseite des Vorsprungs überlappend verbunden sind, um eine Drehsperre zu erzielen (rise along the side wall to prevent rotating of the tongue part).The JP-A 09/226 762 (Hokkai Can) uses a similar projection in the area inside the rivet island, whose upwardly curved, deformed with a further step edge regions (there 17) via a "press-bond" with the curved wall side of the projection are overlapping connected to a turnstile to reach the side wall to prevent rotating the tongue part).

Die Erfindung steht vor der technischen Problemstellung, eine Drehsperre eines Tab zu erzielen, aber die Fertigung und die Zuverlässigkeit der Drehsperre bzw. eine Lageausrichtung der montierten Grifflasche zu verbessern.The invention is faced with the technical problem of achieving a turnstile tab, but to improve the manufacture and reliability of the turnstile or a positional alignment of the mounted grip tab.

Erfindungsgemäß wird vorgeschlagen, den Vorsprung nicht durch eine Öffnung des Anbringungsabschnitts hindurchragen zu lassen und dazu den Anbringungsabschnitt zuvor mit einer Öffnung zu versehen, sondern den Anbringungsabschnitt unversehrt zu belassen und eine von außen auf den Anbringungsabschnitt einwirkende Sperre vorzusehen.According to the invention, it is proposed not to allow the projection to protrude through an opening of the attachment portion and to provide the attachment portion beforehand with an opening, but to leave the attachment portion undamaged and to provide a barrier acting externally on the attachment portion.

Um die Sperrwirkung zu erhalten, die auch eine Begrenzungswirkung sein kann, also von einer völligen Verhinderung einer Drehbewegung bis zu einer wesentlichen Einschränkung der Drehbewegung verstanden werden soll, gibt es ein Anschlagen eines Außenrandes des flächigen Anbringungsabschnitts (rivet island) an den aus dem Blechdeckel ausgeformten Vorsprung (Anspruch 10). Nachdem der Vorsprung an dem Panel lagestabil ist, in allen betrieblichen Stellungen, auch bei Beginn des Aufbrechens des Öffnungsabschnitts, und der Anbringungsabschnitt selbst im wesentlichen planparallel zur Ebene des Deckelspiegels liegt, eng um den zentralen Niet als Befestigungsstelle herum, bewegt sich keine der zur Drehfixierung herangezogenen Elemente bei einer Öffnungsbewegung der Grifflasche betriebsbedingt voneinander weg. Eine Öffnungsbewegung als vertikale Kippbewegung (Anspruch 2, 13, 14) lässt die Drehfixierung durch Angreifen einer Randkante des Anbringungslappens an dem panelseitigen Vorsprung unbeeinflusst.In order to obtain the blocking effect, which may also be a limiting effect, that is, to be understood from a complete prevention of rotational movement to a significant restriction of the rotational movement, there is an abutment of an outer edge of the flat attachment portion (rivet island) to the molded from the sheet metal lid Projection (claim 10). After the projection on the panel is stable in position, in all operational positions, even at the beginning of the opening of the opening portion, and the attachment portion itself is substantially plane-parallel to the plane of the lid mirror, tightly around the central rivet as attachment point, none of the rotational fixation moves used elements in an opening movement of the handle tab operationally away from each other. An opening movement as a vertical tilting movement (claim 2, 13, 14) leaves the rotational fixation unaffected by attacking a peripheral edge of the attachment tab on the panel-side projection.

Vorteilhaft ist auch die Verwendung einer von der Fertigungsseite her schon vorliegenden Randkante an einer üblichen Grifflasche, die nicht spezifisch zusätzlich ausgebildet werden muss, um die Drehsperre nach einem Anbringen der Grifflasche am Panel ("staking") zu erhalten. Die einzige Beeinflussung findet am Blechdeckel selbst statt, der eine Ausformung erhält, wie sie der Niet im Vorstadium auch ist, die bevorzugt auch während der Ausbildung des Nietes parallel mit vorausgeformt und später in einem weiteren Arbeitsvorgang des entstehenden Blechdeckels umgeformt oder genauer ausgeformt ("reformed") werden kann (Anspruch 24, Anspruch 23, Anspruch 36). Der Vorsprung kann also einstückig mit dem Blechdeckel ausgebildet werden, wie es auch die Befestigungsstelle durch einstückige Ausbildung für den Anbringungslappen der Grifflasche ist.It is also advantageous to use a marginal edge already present on the production side on a conventional grip tab which does not have to be specifically formed in order to obtain the turnstile after attaching the grip tab to the panel. The only influence takes place on the metal lid itself, which receives a shape, as it is the rivet in the pre-stage, which preferably preformed during the formation of the rivet in parallel with and later formed in a further operation of the resulting sheet metal lid or formed more accurate ("reformed ") (claim 24, claim 23, claim 36). The projection can thus be formed integrally with the sheet metal lid, as it is also the attachment point by integral formation for the attachment tabs of the grip tab.

Der Vorsprung kann streifenförmig (linienförmig) ausgebildet sein und bevorzugt quer und/oder parallel zu einer Längserstreckung der Grifflasche (Längsachse bzw. Längsebene) orientiert sein, wobei er an einer entsprechend ausgerichteten Randkante des Anbringungsabschnitts für seine Sperrwirkung angreift oder ihr ganz eng benachbart ausgebildet ist. In einer Längserstreckung kann sich der Vorsprung über mehr als 30 %, bevorzugt über mehr als 50 % bis mehr als 80 % der Breite des Anbringungslappens erstrecken (Anspruch 5).The projection may be strip-shaped (line-shaped) and preferably oriented transversely and / or parallel to a longitudinal extension of the grip tab (longitudinal axis or longitudinal plane), wherein it engages on a correspondingly aligned edge edge of the attachment portion for its blocking effect or is formed very closely adjacent , In a longitudinal extension, the projection may extend over more than 30%, preferably over more than 50% to more than 80% of the width of the attachment lobe (claim 5).

Ist die Ausbildung der Vorsprünge parallel zur Längserstreckung der Grifflasche, also senkrecht zur zuvor genannten Querorientierung, ist die Längserstreckung kürzer als die Längserstreckung des Anbringungslappens (rivet island) der Grifflasche, bevorzugt an einer von der Befestigungsstelle möglichst weit entfernten Stelle mit großem Abstand, der aber nur so groß ist, dass zumindest ein Abschnitt der beiden Randlinien an dem zumindest einen Vorsprung bei einem Beginn einer Drehbewegung sperrend anzuliegen vermag (Anspruch 6).If the formation of the projections parallel to the longitudinal extent of the grip tab, that is perpendicular to the aforementioned transverse orientation, the longitudinal extent is shorter than the longitudinal extent of the attachment tab (rivet island) of the handle tab, preferably at a location as far as possible from the attachment point with a large distance, but the is only so large that at least a portion of the two edge lines on the at least one projection at a start of a rotational movement is able to abut (claim 6).

Durch die Anbringung möglichst weit von der Befestigungsstelle entfernt kann die größtmögliche Kraft aufgebracht werden, die sich als Sperrwirkung gegen ein vom Benutzer veranlasstes, versehentliches oder mutwilliges Verdrehen des Griffes entgegenstemmt (Anspruch 21). Besonders bei den parallel zur Längserstreckung der Grifflasche orientierten Vorsprüngen ist die Kraft zum Aufbringen der Drehsperre groß. Alle drei können auch kombiniert sein (Anspruch 34).By attaching as far away from the attachment point, the greatest possible force can be applied, which counteracts as a blocking effect against a user-induced, accidental or wanton twisting of the handle (claim 21). Especially with the parallel to the longitudinal extent of the grip tab oriented projections, the force for applying the turnstile is large. All three can also be combined (claim 34).

Zur Höhenerstreckung des zumindest einen Vorsprungs ist zu sagen, dass sie zumindest der Blechdicke des Anbringungsabschnittes entsprechen sollten (Anspruch 19, Anspruch 20), bevorzugt leicht bis deutlich höher ausgebildet sein können, um eine zuverlässige Lagefixierung zu erhalten, die aber nicht dadurch beeinträchtigt wird, dass der Griffabschnitt betätigt oder angehoben wird, nachdem der Anbringungsabschnitt jenseits der Befestigungsstelle zuverlässig in einer Planlage zum Panelabschnitt im Umfeld des Nietes gelegen ist (button coin area).For the height extension of the at least one projection is to say that they should at least correspond to the sheet thickness of the attachment portion (claim 19, claim 20), preferably slightly to significantly higher trained to obtain a reliable positional fixation, which is not affected thereby that the grip portion is actuated or raised after the attachment portion beyond the attachment point is reliably located in a plane position to the panel portion in the vicinity of the rivet (button coin area).

Das Vorsehen mehrerer Vorsprünge ist möglich, wobei nicht alle Vorsprünge demselben Außenrandabschnitt des Befestigungsabschnitts zugeordnet sein müssen (Anspruch 6 bis 9). Die Vorsprünge können auch unterschiedlich ausgestaltet sein, so streifenförmig, rund bis oval oder kombiniert. Ist ein geradliniger Außenrandabschnitt des Anbringungsabschnitts vorgesehen, kann eine geradlinige (streifenförmige) Vorsprunggestaltung vorteilhaft sein. Die geradlinige Streifengestaltung kann auch durch Aneinanderreihen von zumindest zwei punktförmigen Vorsprüngen erreicht werden, die dann eine Gruppe bilden, die demselben Außenrand des Anbringungsabschnitts zugeordnet ist.The provision of a plurality of projections is possible, wherein not all projections must be assigned to the same outer edge section of the fastening section (claims 6 to 9). The projections can also be designed differently, so strip-shaped, round to oval or combined. If a straight-line outer edge portion of the attachment portion is provided, a straight-line (strip-shaped) projection configuration may be advantageous. The linear strip design can also be achieved by juxtaposing at least two punctiform projections, which then form a group which is assigned to the same outer edge of the attachment section.

Der Anbringungsabschnitt als Befestigungslappen ist über einen Knickbereich als Gelenklinie mit der übrigen Grifflasche verbunden, also einstückig (Anspruch 13, 11). Sie ist damit zwischen dem Öffnungsabschnitt (der Einbrechnase) und dem bevorzugt als mit einer Öffnung versehenen Griffabschnitt ausgebildet.The attachment portion as a fastening tab is connected via a kink area as joint line with the rest of the grip tab, so in one piece (claim 13, 11). It is thus formed between the opening portion (the insertion nose) and preferably provided with an opening handle portion.

Ist der Anbringungsabschnitt im wesentlichen rechteckig, bildet sich unter Verwendung der Gelenklinie und von drei Randlinien der im wesentlichen rechteckige, flächige Anbringungsabschnitt aus (Anspruch 12). Insbesondere ist dieser flächige Abschnitt quadratisch gestaltet, wobei der Nietkopf nach der Montage nicht mittig, sondern näher an der Gelenklinie zu liegen kommt. Der Abstand der nach außen weisenden Randkante ist demzufolge größer als die Hälfte der Längserstreckung des Anbringungsabschnitts, so dass eine entsprechend verbesserte Kraftwirkung entsteht, wenn ein Vorsprung am Panel der am weitesten von der Befestigungsstelle entfernten Randkante zugeordnet werden kann.If the mounting portion is substantially rectangular, forms using the hinge line and three edge lines of the substantially rectangular, flat mounting portion of (claim 12). In particular, this flat section is square, wherein the rivet head after assembly does not come to rest centrally but closer to the joint line. Accordingly, the distance of the outwardly facing peripheral edge is greater than half the longitudinal extent of the attachment portion, so that a correspondingly improved force effect arises when a projection on the panel can be assigned to the edge furthest away from the attachment point.

Besonders günstig ist die Ausbildung zumindest eines im Querschnitt unsymmetrischen Vorsprungs, der an seiner zum Anbringungsabschnitt weisenden Flanke steiler ausgebildet ist als die davon entferntere Flanke (Anspruch 17, 18 und 22 oder 23). Eine solche Ausbildung kann auch bei punktförmigen oder ovalen Vorsprüngen gewählt werden.Particularly favorable is the formation of at least one unbalanced in cross-section projection which is formed steeper at its flank pointing to the mounting portion than the flank remote therefrom (claim 17, 18 and 22 or 23). Such a design can also be selected with punctiform or oval projections.

Bei dem Nachverformen erfolgt bevorzugt eine Dickenreduzierung einer Oberseite des (streifenförmigen) Vorsprungs (Anspruch 22). Dadurch entsteht eine Verfestigung dieses Abschnitts und des gesamten Vorsprungs als solches ebenso. Das betrifft auch das Verfahren (Anspruch 35). Zeitgleich mit dem Nachformen kann auch die Kerblinie eingebracht werden, im gleichen Arbeitsgang (Anspruch 37).In the post-deformation, a thickness reduction of an upper side of the (strip-shaped) projection (claim 22) preferably takes place. This results in solidification of this portion and the entire projection as such as well. This also applies to the method (claim 35). Simultaneously with the reshaping and the score line can be introduced in the same operation (claim 37).

Optisch ersichtlich ist das Ergebnis dieses Umformens (reforming) an einer abgeflachten Oberseite (Anspruch 17). Der so gebildete Vorsprung erhält eine größere Breite als er insgesamt hoch ist (Anspruch 7, Anspruch 19, 20). Noch größer ist die jeweilige Längserstreckung eines Vorsprungs, die wesentlich größer ist, als die Breite des Vorsprungs. Dies gilt für langgestreckte streifen- oder linienförmige Vorsprünge. Bei der Ausbildung eines steileren Flankenabschnitts (Anspruch 33), der gegenüber der Vorform deutlicher ausgeprägt wird, kann eine Randkante entstehen, die (zumindest) einen Abschnitt besitzt, welcher in einem Winkel von etwa 90° gegenüber der Ebene des Panels verläuft. Dies betrifft die Kante, welche dem zugeordneten Randkantenabschnitt des Anbringungsabschnitts gegenüberliegt. Bei der stärkeren oder steileren Ausbildung dieser Flanke hilft auch der Prägevorgang (Anspruch 36), der für die Verstärkung des umgeformten Blechs auf der Oberseite verantwortlich ist (Anspruch 17, 38 und 39).Visually apparent is the result of this reforming on a flattened top (claim 17). The projection thus formed receives a greater width than it is altogether high (claim 7, claim 19, 20). Even greater is the respective longitudinal extent of a projection, which is substantially larger than the width of the projection. This applies to elongated strip or line-shaped projections. In the formation of a steeper edge portion (claim 33), which is more pronounced relative to the preform, a peripheral edge may arise which (at least) has a portion which extends at an angle of about 90 ° relative to the plane of the panel. This relates to the edge which faces the associated marginal edge portion of the attachment portion. In the stronger or steeper formation of this edge also helps the stamping process (claim 36), which is responsible for the reinforcement of the formed sheet on the top (claim 17, 38 and 39).

Sind mehrere Vorsprünge im vorgenannten Sinne vorgesehen, müssen sie nicht an derselben Randlinie des Anbringungsabschnitts bei Beginn einer Drehbewegung angreifen, sondern können unterschiedlichen Randkanten zugeordnet sein (Anspruch 16).If a plurality of projections provided in the aforementioned sense, they need not attack on the same edge line of the attachment portion at the beginning of a rotational movement, but may be associated with different marginal edges (claim 16).

Geht man von einem noch unfertigen Blechdeckel aus, der erst zur Montage einer Grifflasche vorbereitet wird, erfasst die hier beanspruchte Erfindung die Ausbildung des Vorsprungs an einer solchen Stelle, die weit genug von der vorgesehenen Befestigungsstelle (dem ausgeformten Niet bzw. seiner Vorform) entfernt ist, und zwar so weit, dass der Außenrand in Gestalt eines vom künftigen Niet weg weisenden Randes der Anbringungsfläche (rivet island) sehr nahe des Vorsprungs zu liegen kommt, um die Drehsperre zur Wirkung kommen zu lassen. Dieser Platz ist im äußeren Randbereich eines Nietkopf-Hofes bzw. des "Nietfußes", der sich um die Ausbildung des Nietzentrums herum aus der Vorform des Nietes verblieben sichtbar erstreckt (Anspruch 24 bis 28, Anspruch 32).Assuming a still unfinished metal lid, which is only prepared for mounting a grip tab, the invention claimed here covers the formation of the projection at such a location, which is far enough away from the intended attachment point (the molded rivet or its preform) so far that the outer edge comes in the form of a rivet island facing away from the future rivet edge very close to the projection to make the turnstile effect. This space is visible in the outer edge region of a Nietkopf-courtes or "Nietfußes", which remained around the formation of the rivet center from the preform of the rivet visible (claim 24 to 28, claim 32).

Der Vorsprung als Linie oder Streifen liegt zumindest teilweise außerhalb des geschwächten Nietfußbereichs, in welchem das Blech durch die Ausformung der Befestigungsstelle dünn ist. Damit ist der Randbereich dieses Nietfußes angesprochen (Anspruch 25), wobei bevorzugt mehr als 40% einer angenommenen Fläche eines streifenförmigen Vorsprungs außerhalb des Nietfußbereiches liegen (Anspruch 26).The projection as a line or strip lies at least partially outside the weakened Nietfußbereichs in which the sheet is thin by the shape of the attachment point. Thus, the edge region of this Nietfußes is addressed (claim 25), wherein preferably more than 40% of an assumed area of a strip-shaped projection outside the Nietfußbereiches are (claim 26).

Zum Nietfußbereich kann auf eine optische Veränderung der Oberfläche verwiesen werden, die auf der Innenseite des Blechdeckels verbleibt, nachdem der Niet ausgeformt und die Grifflasche angeordnet ist (Anspruch 27, Anspruch 28). Aufgrund der Platzierung im Außenbereich, also möglichst weit von dem geschwächten Blech bzw. der dünnen Blechstärke weg, kann die Ausformung deutlich höher ausfallen, bevor das Blech beschädigt wird. Durch die Ausformung können Höhen erzielt werden, welche oberhalb einer Blechstärke liegt, die der Anbringungsabschnitt der Grifflasche besitzt.For Nietfußbereich can be referenced to an optical change of the surface remaining on the inside of the sheet metal lid after the rivet is formed and the grip tab is arranged (claim 27, claim 28). Due to the placement in the outer area, so far as possible from the weakened sheet metal or the thin sheet thickness away, the shape can turn out significantly higher before the sheet is damaged. By the molding heights can be achieved, which lies above a plate thickness, which has the attachment portion of the grip tab.

Ist eine Streifenform als Vorsprung vorgesehen, kann sie in ihrer Länge größer als der Durchmesser des fertigen Nietkopfs ausgebildet werden.If a strip shape is provided as a projection, it can be made larger in its length than the diameter of the finished rivet head.

Nachdem der Anbringungsabschnitt aus einem Stück des Mittenbereichs der Grifflasche ausgebildet ist, bestehen nur geringe sichtbare Zwischenräume zwischen dem über eine doppelte Knicklinie nach unten in eine tiefer liegende Ebene verlagerten Anbringungsabschnitt und der etwas darüber liegenden parallelen Ebene der übrigen Grifflasche. Die Anbringung der Vorsprünge an zumindest einer der freien, von dem Anbringungsabschnitt nach außen weisenden Randkanten ist deshalb von außen kaum oder nur schwer einsehbar, so dass die Drehblockade für den Betrachter nahezu unsichtbar ist. Eine ggf. farbig eingefärbte Grifflasche wird in ihrer farbigen Gestalt nicht weiter verändert.After the attachment portion is formed from one piece of the center region of the grip tab, there are only slight visible gaps between the mounted over a double fold line down to a lower level mounting portion and the slightly above parallel plane of the remaining grip tab. The attachment of the projections on at least one of the free, from the attachment portion facing outward marginal edges is therefore difficult or difficult to see from the outside, so that the rotation block is almost invisible to the viewer. A possibly color-coded grip tab is not changed further in its colored form.

Ausführungsbeispiele erläutern und ergänzen die Erfindung.

Figur 1, Figur 2, Figur 3
zeigen drei Stufen in einem Herstellungsprozess eines Blechdeckels mit einer Station der Einbringung der Schwächungslinie 16, einer Folgestation zum Einbringen einer Fingermulde 13 und zusätzlicher Sicken 18a im Öffnungsbereich innerhalb der Schwächungslinie und einer noch weiteren Station, bei der eine Grifflasche 30 über einen einstückig am Deckelblech angeformten Niet 11 angebracht wird, über einen Anbringungsabschnitt 31, der als flächiger Anbringungslappen in allen drei Darstellungen schematisch eingezeichnet ist.
Figur 4
ist eine Ausschnittsvergrößerung aus Figur 3, unter Hervorhebung des Anbringungsabschnitts 31 und des Nietes 11 als Befestigungsstelle.
Figur 4a
ist ein Schnitt entlang der eingezeichneten Schnittlinie C-C in Figur 4.
Figur 5
ist eine alternative Gestaltung zur Lagefixierung des Anbringungsabschnitts 31 und damit der gesamten Grifflasche 30.
Figur 5a
ist eine Schnittzeichnung durch die Mittelebene der Figur 5, alternativ durch die vertikale Längsebene 100 der Figur 3.
Figur 6
ist eine alternative Gestaltung von Vorsprüngen zur Sperrung einer Drehbewegung der Grifflasche.
Figur 7
ist weitere alternative Gestaltung zur Figur 6.
Figur 8
ist ein Querschnitt in der Längsebene 100, zur Veranschaulichung einer scharfen Vorderkante 20a eines streifen- oder linienförmigen Vorsprungs 20.
Figur 8a
ist eine Schnittdarstellung einer Realisierung mit einer Figur 8 entsprechenden Darstellung.
Figur 9a
ist eine schematische Erläuterung der wirkenden Drehmomente bei einem Vorsprung, der parallel zur Mittelebene 100 verläuft.
Figur 9b
ist eine vergleichbare Erläuterung der wirkenden Drehmomente bei einem quer zur Mittelebene 100 liegenden Vorsprung 20.
Figur 10
ist eine Verdeutlichung des von der Innenseite sichtbaren Bereichs 11a um den Niet 11 des Deckels herum, wobei der Vorsprung 20 als sich nach außen wölbender Hohlraum zu erkennen ist. Diese Figur stellt nur einen Ausschnitt um den Niet 11 als Befestigungsstelle dar.
Exemplary embodiments explain and supplement the invention.
FIG. 1, FIG. 2, FIG. 3
show three stages in a manufacturing process of a metal cover with a station of introduction of the weakening line 16, a follower station for introducing a finger recess 13 and additional beads 18a in the opening area within the weakening line and yet another station, in which a grip tab 30 integrally formed on the cover sheet Rivet 11 is attached, via an attachment portion 31, which is shown schematically as a flat attachment tab in all three representations.
FIG. 4
is an excerpt from FIG. 3 , highlighting the mounting portion 31 and the rivet 11 as an attachment point.
FIG. 4a
is a section along the drawn section line CC in FIG. 4 ,
FIG. 5
is an alternative design for fixing the position of the attachment portion 31 and thus the entire grip tab 30th
FIG. 5a
is a sectional view through the median plane of the FIG. 5 Alternatively, by the vertical longitudinal plane 100 of FIG. 3 ,
FIG. 6
is an alternative design of protrusions to block a rotational movement of the grip tab.
FIG. 7
is another alternative design to FIG. 6 ,
FIG. 8
is a cross-section in the longitudinal plane 100, illustrating a sharp leading edge 20a of a strip or line-shaped projection 20th
FIG. 8a
is a sectional view of a realization with a FIG. 8 corresponding representation.
FIG. 9a
is a schematic explanation of the acting torques at a projection which is parallel to the center plane 100.
FIG. 9b
is a comparable explanation of the acting torques at a transverse to the center plane 100 projection 20.
FIG. 10
is an illustration of the visible from the inside region 11a around the rivet 11 of the lid around, wherein the projection 20 can be seen as an outwardly bulging cavity. This figure represents only a section around the rivet 11 as an attachment point.

Der in Figur 1 bis 3 entstehende Blechdeckel weist ersichtlich einen Randabschnitt 12 auf, der zum Falzen an einen Getränkedosenrumpf geeignet ist. Der Blechdeckel selbst ist aus einem Blech geringer Stärke, meist unter 0,24 mm, hergestellt und hat bereits vorhergehende Arbeitsstationen durchlaufen, bevor Figur 1 ihn darstellt. Er weist einen inneren Deckelspiegel (Panel) 10 auf, der vom Falzrand 12 umgeben ist. Innerhalb des Deckelspiegels 10 ist eine Schwächungslinie 16 um einen Öffnungsbereich herum vorgesehen, der von einer im wesentlichen U-förmigen Sicke 18 umgeben wird. Innerhalb dieser Sicke, die sich zum Mittenbereich des Panels öffnet, ist die im wesentlichen O-förmige Schwächungslinie 16 als eine Kerblinie (score) gestaltet, die einen Übergangsabschnitt besitzt, der nicht gekerbt ist und damit als Verbindungsabschnitt zum übrigen Panel 10 dient, wenn der Öffnungsabschnitt 17 durch Wirkung einer später erläuterten Grifflasche eingebrochen wird, entlang der Kerblinie 16.The in Figure 1 to 3 resulting sheet metal lid clearly has an edge portion 12 which is suitable for folding to a beverage can body. The sheet metal lid itself is made of a sheet of small thickness, usually less than 0.24 mm, and has already undergone previous workstations before FIG. 1 represents him. It has an inner lid mirror (panel) 10, which is surrounded by the seam edge 12. Within the lid mirror 10, a line of weakness 16 is provided around an opening area which is surrounded by a substantially U-shaped bead 18. Within this bead, which opens to the central area of the panel, the substantially O-shaped line of weakness 16 is designed as a score which has a transition portion which is not notched is and thus serves as a connecting portion to the rest of the panel 10 when the opening portion 17 is broken by the action of a later mentioned grip tab along the score line 16.

Etwa mittig im Panel ist eine Befestigungsstelle 11 vorgesehen, die in den Ausschnittsvergrößerungen später deutlicher zu erkennen ist. Ihr ist ein Anbringungsabschnitt als Blechlappen 31 schematisch zugeordnet, der Teil der Grifflasche nach Figur 3 ist, an der er über eine Gelenklinie als Knicklinie 38 einstückig angeformt ist. Diese Grifflasche 30 besitzt einen Griffabschnitt 32, hier mit einer kreisförmigen Öffnung versehen, an der die Grifflasche vom Benutzer betätigt wird, zum Aufbrechen der Kerblinie 16 nach Figur 1. Die Grifflasche 30 weist vor dem Anbringungsabschnitt 31 auch einen Öffnungsabschnitt 33 auf, der als Nase zum Einbrechen über dem Einbrechabschnitt 17 gelegen ist, wozu bei Figur 2 in einem Arbeitsschritt eine zusätzliche Sickenform 18a als augapfelförmige Sicke vorgesehen ist, die den quer liegenden LOE-Öffnungsbereich verstärkt, um die Öffnungskräfte auf den Einbrech-Startabschnitt (bogenförmig ausgebildetes Ende der Kerblinie 16) aufbringen zu können. Die angeordnete Grifflasche 30 liegt im wesentlichen parallel zum Panel, der selbst nicht genau in einer Ebene ausgebildet sein muss, sondern leicht aufgewölbt sein kann, aber der Bereich um die Befestigungsstelle 11 ist im wesentlichen eben gestaltet und erlaubt hier eine im wesentlichen parallele Anordnung des Anbringungslappens 31 der Grifflasche 30.Approximately in the middle of the panel, an attachment point 11 is provided, which can be seen later in the enlarged detail later. It is a mounting portion as sheet metal tabs 31 associated schematically, the part of the grip tab after FIG. 3 is at which he is integrally formed over a joint line as a bending line 38. This grip tab 30 has a handle portion 32, here provided with a circular opening at which the grip tab is actuated by the user, for breaking the score line 16 after FIG. 1 , The grip tab 30 also has an opening portion 33 in front of the attachment portion 31, which is located as a nose for collapsing over the burglary portion 17, to which FIG. 2 In one step, an additional bead form 18a is provided as an eyeball-shaped bead, which reinforces the transverse LOE opening area in order to be able to apply the opening forces to the burglary starting section (arcuate end of the score line 16). The arranged grip tab 30 is substantially parallel to the panel, which itself need not be formed exactly in a plane, but may be slightly curved, but the area around the attachment point 11 is substantially planar and here allows a substantially parallel arrangement of the attachment tab 31 of the pull tab 30.

Zur Übersicht ist die Längs-Mittelebene 100 eingezeichnet, die sich in Richtung der Längserstreckung der Grifflasche 30 erstreckt. Eine Querebene 101 verläuft senkrecht dazu.For clarity, the longitudinal center plane 100 is shown, which extends in the direction of the longitudinal extent of the grip tab 30. A transverse plane 101 is perpendicular thereto.

Im angeordneten Zustand (staked end) greift der Griffabschnitt 32 der Grifflasche über die Fingermulde 13, die etwa im selben Abstand wie die innere Verstärkungsrippe 18a auf der anderen Seite der Befestigungsstelle 11 im Panel 10 angebracht ist. Die Grifflasche wird im Zuge der Entstehung des fertigen Blechdeckels erst in der Figur 3 angebracht. Zuvor wird zunächst die Befestigungsstelle als Blase ausgeformt, um den Anbringungsabschnitt 31 der Grifflasche 30 an dem Panel befestigen zu können. Um diese Befestigungsstelle 11 herum werden gemäß Figur 1 drei streifenförmige Vorsprünge als Sicken nach oben ragend ausgeformt (also zur Außenseite des Blechdeckels). Die quer zur Mittelebene 100 liegende Sicke 20 ist länger als die beiden benachbarten Sicken, die parallel zur Mittelebene 100 verlaufen. Sie sind in Figur 4 mit 21a, 21b verdeutlichend dargestellt, wie dort auch die längere Sicke 20 genauer in Bezug auf den Anbringungslappen 31 dargestellt ist.In the staked end, the grip portion 32 of the grip tab engages over the finger recess 13, which is mounted approximately the same distance as the inner reinforcing rib 18 a on the other side of the attachment point 11 in the panel 10. The grip tab is in the course of the emergence of the finished metal lid only in the FIG. 3 appropriate. First, the attachment point is first formed as a bubble in order to attach the attachment portion 31 of the handle tab 30 to the panel can. Around this attachment point 11 are around according to FIG. 1 three strip-shaped projections formed as beads projecting upwards (ie to the outside of the sheet metal lid). The bead 20 lying transversely to the center plane 100 is longer than the two adjacent beads, which run parallel to the center plane 100. They are in FIG. 4 illustrated with 21a, 21b illustrated, as there, the longer bead 20 is shown in more detail with respect to the attachment tabs 31.

Der Anbringungslappen 31 ist in der Figur 1 nur zur Verdeutlichung der Abstände der Sicken von der Befestigungsstelle 11 eingezeichnet, befindet sich hier aber noch nicht an dem Blechdeckel. In der nächsten Station der Fertigung wird die Ausformung der drei Sicken 20,21a,21b verbessert oder genauer gestaltet. Dieses "Reforming" führt zu einer Ausbildung der Sicken (Vorsprünge), wie sie später für die Lagefixierung nach Figur 3 und die im Folgenden beschriebenen Figuren verwendet wird. In dieser Station erhalten diese Vorsprünge ihre korrekten Profilgeometrien, nachdem sie einstückig aus dem Deckelblech (dem Panel) herausgeformt wurden und in Höhenrichtung h sich zumindest in einer solchen Höhe erstrecken, die der Blechdicke des Anbringungsabschnitts 31 der Grifflasche 30 entspricht.The attachment tab 31 is in the FIG. 1 located only to illustrate the distances of the beads of the attachment point 11, but is not yet here on the sheet metal lid. In the next station of manufacture, the shape of the three beads 20,21a, 21b is improved or made more accurate. This "reforming" leads to a formation of the beads (protrusions), as they later for the positional fixation FIG. 3 and the figures described below is used. In this station, these projections receive their correct profile geometries after they have been integrally molded out of the cover sheet (the panel) and extend in the height direction h at least at a height corresponding to the sheet thickness of the attachment portion 31 of the grip tab 30.

In der Figur 3 kommt diese Grifflasche 30 hinzu, wird über den Nietschaft gelegt, der in einem Formvorgang mit einem Nietkopf ausgebildet wird, wobei er im Durchmesser größer dargestellt ist als in den vorhergehenden Figuren 1 und 2. Mit dieser Nietkopfbildung wird die Grifflasche 30 am Panel befestigt und das über den Anbringungsabschnitt 31, der über die Knicklinie 38 mit der übrigen Grifflasche 30 verbunden ist. Der Öffnungsabschnitt 33 liegt über dem Einbrechabschnitt innerhalb der Kerblinie 16, nahe bei der zusätzlichen versteifenden Sicke 18a.In the FIG. 3 when this grip tab 30 is added, it is placed over the rivet shank, which is formed in a molding operation with a rivet head, wherein it is shown larger in diameter than in the preceding Figures 1 and 2 , With this Nietkopfbildung the grip tab 30 is attached to the panel and that on the mounting portion 31, which is connected via the fold line 38 with the rest of the handle tab 30. The opening portion 33 lies above the break-in portion within the score line 16, close to the additional stiffening bead 18a.

Um die Aufbrechkraft und die Genauigkeit beim Aufbrechvorgang sicherzustellen, soll sich die Grifflasche 30 nicht in einer Drehrichtung bewegen können, die in Figur 4 mit α benannt ist.In order to ensure the Aufbrechkraft and the accuracy of the breaking process, the grip tab 30 should not be able to move in a direction of rotation in FIG. 4 is named with α.

Ersichtlich würde dabei das vordere Nasenende des Öffnungsabschnitts 33 von dem genauen Ort wegbewegt werden, der dazu vorgesehen ist, die Einbrechkraft, das Weiterreißen und das anschließende vollständige Öffnen des Öffnungsbereiches 17 sicherzustellen. Wünschenswert ist es nach Figur 4 also, die Bewegung α so gering wie möglich auszugestalten, bevorzugt sogar ganz zu unterbinden. Dazu waren in den Figuren 1, 2 und 3 drei streifenförmige Vorsprünge 21a,21b und 20 vorgesehen, die den drei freien Randkanten 31 a,31 b,31 c des Anbringungsabschnitts 31 des Griffabschnitts 30 zugeordnet sind. Ein kleiner Spalt 21',21" und 20' kann zwischen dem jeweils nach außen weisenden Rand und dem jeweiligen Innenrand des jeweiligen Vorsprungs verbleiben, bspw. 31 c von 20" bei dem Vorsprung 20. Der Spalt kann aber auch an zumindest einem der nach außen weisenden Ränder des Anbringungsabschnitts 31 auf Null reduziert sein.Obviously, the front nose end of the opening portion 33 would be moved away from the exact location intended to ensure the breaking force, the tearing and the subsequent complete opening of the opening portion 17. Desirable it is after FIG. 4 that is, to design the movement α as small as possible, preferably even to suppress it altogether. These were in the FIGS. 1, 2 and 3 three strip-shaped projections 21 a, 21 b and 20 are provided, which are assigned to the three free marginal edges 31 a, 31 b, 31 c of the attachment portion 31 of the handle portion 30. A small gap 21 ', 21 "and 20' can remain between the respective outwardly facing edge and the respective inner edge of the respective projection, for example. 31 c of 20" in the projection 20. The gap can also on at least one of outwardly facing edges of the attachment portion 31 may be reduced to zero.

Die Breite des Anbringungsabschnitts 31 ist mit "b" bezeichnet, so dass der Mindestabstand der beiden parallel zur Längsmittelebene 100 liegenden, als Sicken ausgebildeten Vorsprünge 21b,21a dieses Maß mit ihren Innenrändern 21b' und 21a' als Abstand besitzen. Die Längserstreckung des Anbringungsabschnitts 31 in der Ebene 100 erstreckt sich über den Nietkopf als Befestigungsstelle 11. Dabei ist ersichtlich, dass die Länge der beiden Sicken 21 a,21 b kürzer ist als die Hälfte der Längserstreckung des Anbringungsstücks 31, und dass diese dabei so weit als möglich in den hinteren Bereich des Anbringungsabschnitts verlegt sind, um die maximal mögliche Kraft für eine Lagefixierung bei einer angenommenen Drehbewegung α aufzubringen.The width of the attachment portion 31 is designated by "b", so that the minimum distance of the two lying parallel to the longitudinal center plane 100, formed as beads projections 21b, 21a have this measure with their inner edges 21b 'and 21a' as a distance. The longitudinal extent of the mounting portion 31 in the plane 100 extends over the rivet head as an attachment point 11. It can be seen that the length of the two beads 21 a, 21 b is shorter than half the longitudinal extent of the attachment piece 31, and that this so far are displaced as possible in the rear portion of the mounting portion to apply the maximum possible force for a positional fixation with an assumed rotational movement α.

Das erreicht auch der weitest mögliche Abstand des quer zur Längsmittelebene 100 - in der Querebene 101 liegenden - Vorsprungs 20, der länger ausgestaltet ist als die beiden zuvor beschriebenen parallelen Vorsprünge. Er erstreckt sich über mehr als die Hälfte, bevorzugt sogar mehr als 80 % der Breite b des Anbringungsabschnitts 31.This also achieves the widest possible distance of the transversely to the longitudinal center plane 100 - lying in the transverse plane 101 - projection 20 which is designed to be longer than the two parallel projections described above. It extends over more than half, preferably even more than 80%, of the width b of the attachment section 31.

In nicht dargestellten Ausführungsbeispielen können auch eine oder mehrere der drei beschriebenen streifenförmigen Sicken weggelassen werden.In embodiments not shown, one or more of the three described strip-shaped beads can be omitted.

So ist bspw. eine Geometrie mit nur einem Vorsprung 20 möglich, wie er in Figur 5 verdeutlicht ist. Hier ist der vom Niet am Entfemtesten liegende und nach außen weisende Rand 31 c nahe dieser streifenförmigen Geometrie 20 angeordnet, so dass auch hier eine Drehbewegung α größtmöglich unterbunden werden kann, jedenfalls so weit unterbunden wird, dass eine Beeinflussung des Öffnungsverhaltens bei einem Aufwärtskippen der Grifflasche 30 am Griffabschnitt 32 vermieden werden kann. Die Schwenkbewegung α wird also begrenzt, ganz verhindert, oder es werden zumindest zwei Grenzwerte vorgegeben, die durch Anschlagen bei einer angenommenen Drehbewegung α (in beiden Richtungen um die Achse des Nietes 11) vorgegeben sind. Die Schwenkbewegung liegt im wesentlichen in der Ebene, in der der Panel im Bereich um den Nietkopf 11 gelegen ist, welche Ebene auch planparallel von dem Anbringungsabschnitt 31 eingehalten wird, der sich flächig hier erstreckt. In der dargestellten Ausführungsform als Rechteck, insbesondere Quadrat, hat der Abschnitt 31 zwei parallele Randkanten oder Ränder 31b,31a und eine von der Gelenklinie 38 entfernte, und ihr parallel verlaufende Randkante 31 c. Vorstellbar ist auch eine andere Gestaltung des Anbringungsabschnitts in Form einer bogenförmigen Gestalt, dreieckigen Gestalt oder mit einer nicht gerade verlaufenden entfernten Randkante 31 c.Thus, for example, a geometry with only one projection 20 is possible, as in FIG. 5 is clarified. Here, the most distant from the rivet and outwardly facing edge 31 c arranged near this strip-shaped geometry 20, so that here a rotational movement α can be suppressed as much as possible, at least so far suppressed that an influence on the opening behavior in an upward tilting of the handle 30 can be avoided on the handle portion 32. The pivotal movement α is thus limited, completely prevented, or at least two limit values are predetermined, which are predetermined by striking at an assumed rotational movement α (in both directions about the axis of the rivet 11). The pivotal movement is substantially in the plane in which the panel is located in the area around the rivet head 11, which plane is also maintained plane-parallel of the attachment portion 31, which extends here flat. In the illustrated embodiment as a rectangle, in particular square, the portion 31 has two parallel marginal edges or edges 31b, 31a and a remote from the hinge line 38, and their parallel edge edge 31 c. It is also conceivable another design of the attachment portion in the form of an arcuate shape, triangular shape or with a not straight extending peripheral edge 31 c.

Der in Figur 4a dargestellte Querschnitt stammt aus der entsprechenden Schnittlinie der Figur 4. Hier ist eine unsymmetrische Ausbildung der streifenförmigen Vorsprünge 21 a,21 b vorgesehen, wobei eine steilere Flanke 21 b' näher zu der Randkante 31 b liegt, als die flachere Flanke 21b" des streifenförmigen Vorsprungs 21 b. Gleiches gilt für den dazu parallelen Vorsprung 21 a und die zugehörige Randkante 31 a.The in FIG. 4a shown cross-section comes from the corresponding section line of FIG. 4 , Here, an asymmetrical configuration of the strip-shaped projections 21 a, 21 b is provided, wherein a steeper flank 21 b 'is closer to the peripheral edge 31 b than the flatter flank 21 b "of the strip-shaped projection 21 b a and the associated peripheral edge 31 a.

Parallel verlaufen in der Figur 4a bei hier nicht sichtbarer Niet 11, das Deckelblech im Panel 10 und der Anbringungsabschnitt 31. Eine angenommene Drehbewegung lässt die Randkante 31 a an der steileren Flanke des Vorsprungs 21 a bzw. die Randkante 31 b an der steileren Flanke 21b' des Vorsprungs 21 b anstoßen. Eine engere Zuordnung der steileren Flanken, auf Grund ihrer nahezu senkrecht verlaufenden Stege oder Stufen, erlaubt praktisch vollständige Unterbindung einer noch möglichen geringen (Rest-)Drehbewegung in der Ebene des Deckelblechs des Panels 10 im Nietbereich 11.Parallel run in the FIG. 4a at not visible here rivet 11, the cover plate in the panel 10 and the mounting portion 31. An assumed rotational movement makes the peripheral edge 31 a at the steeper flank of the projection 21 a and the peripheral edge 31 b abut the steeper flank 21 b 'of the projection 21 b , A closer allocation of the steeper flanks, due to their almost vertical webs or steps, allows virtually complete suppression of a still possible small (residual) rotational movement in the plane of the cover plate of the panel 10 in the rivet 11th

Auch zu Figur 5 ist ein Querschnitt in Figur 5a dargestellt, der durch die Längsebene 100 gelegt ist. Diese Darstellung zeigt die beschriebene Situation für nur einen Vorsprung 20, der mit der Randkante 31c des Anbringungsabschnitts 31 zusammenwirkt, zur Vermeidung von funktions-beeinträchtigenden Drehbewegungen α. In der Figur 5a ist dabei die Ausbildung des Nietkopfes als Befestigungsstelle 11 durch eine Öffnung des Anbringungsabschnitts 31 hindurch zu sehen. Auch zu erkennen ist die Zuordnung der freien Randkante 31 c zu dem aus dem Deckelblech ausgeformten Vorsprung 20, der auch - wie Figur 4a für die anderen Vorsprünge 21 b, 21 a verdeutlicht - in unsymmetrischer Gestalt vorgesehen sein kann.Also to FIG. 5 is a cross section in FIG. 5a represented, which is laid through the longitudinal plane 100. This illustration shows the described situation for only one projection 20, which cooperates with the marginal edge 31c of the attachment section 31, to avoid function-impairing rotational movements α. In the FIG. 5a is to see the formation of the rivet head as an attachment point 11 through an opening of the attachment portion 31 therethrough. Also recognizable is the assignment of the free edge 31 c to the formed from the cover plate projection 20, which also - like FIG. 4a for the other projections 21 b, 21 a clarified - may be provided in unbalanced shape.

Die Unsymmetrie quer zur Längserstreckung des Vorsprungs 20 (in der Längsebene 100 des Deckels oder der Grifflasche) veranschaulicht die Figur 8 , bezogen auf den Vorsprung 20, welcher der Randkante 31 c des Anbringungs-Abschnitts 31 zugeordnet ist. Durch die zweifache Verformung, das erste Ausformen nach Figur 1 und das zweite Nachformen nach Figur 2 kann eine sehr steile Vorderkante 20" oder 20a ausgebildet werden, eine sehr große Höhe h (relativ zur Blechstärke), und das Deckelblech dennoch unbeschädigt bleiben, wozu auch beiträgt, dass der Vorsprung möglichst weit von dem empfindlichen Bereich des Niethofes 11 a entfernt ist. Durch die scharfe Vorderkante 20a (oder 20" von Figur 4) bei einer eher flacher verlaufenden zweiten Flanke 20b, welche keine Sperrwirkung mit dem Anbringungsabschnitt 31 vorgibt, können höhere Kräfte aufgebracht werden, bzw. der Anbringungs-Abschnitt 31 erhält weniger Möglichkeit, sich an einer flacher verlaufenden Randkante aufwärts (senkrecht zur Ebene des Panels 10) zu verformen und dadurch die Sperrwirkung zu verlieren.The asymmetry transverse to the longitudinal extent of the projection 20 (in the longitudinal plane 100 of the lid or the gripping tab) illustrates the FIG. 8 , based on the projection 20, which is associated with the peripheral edge 31 c of the attachment portion 31. Due to the double deformation, the first shaping after FIG. 1 and the second reforming after FIG. 2 a very steep leading edge 20 "or 20a can be formed, a very high height h (relative to the sheet thickness), and the cover sheet still remain undamaged, which also contributes that the projection is as far away from the sensitive area of Niethofes 11 a. Due to the sharp front edge 20a (or 20 "from FIG. 4 ) at a rather flatter extending second edge 20b, which specifies no blocking effect with the attachment portion 31, higher forces can be applied, or the attachment portion 31 receives less opportunity, at a flatter edge edge upwards (perpendicular to the plane of the panel 10th ) and thereby lose the barrier effect.

Dies verdeutlicht die Figur 8a , in welcher eine Realisierung im Schnitt gezeigt ist, wobei der Schnitt sich in Längsrichtung erstreckt, wie er von der Längsmittelebene 100 vorgegeben ist, beispielsweise aus der Darstellung der Figur 5 und - praktisch realisiert - der schematischen Darstellung nach der Figur 8 entsprechend. Soweit Bezugszeichen aus den Figuren 4, 5 und 8 die entsprechenden Abschnitte und Teile dort bezeichnen, sind sie in die Realisierung nach Figur 8a übernommen, hier in das untere dargestellte Halbbild. Das obere dargestellte Halbbild bildet eine Vorform 20*, die in einem zweistufigen Herstellungsprozess vor dem zweiten Schritt (dem Nachformen) entsteht. In einem ersten Ausformen nach beispielsweise Figur 1 wird die Vorform 20*, die eher wallförmige Struktur hat, mit zwei flachen Schrägen und einem stark abgerundeten Mittelabschnitt aus dem Panel 10 ausgebildet. In einem zweiten Nachformen nach beispielsweise Figur 2 entsteht die sehr viel steilere Vorderkante 20" (nach Figur 4) oder 20a nach Figur 8, wobei das Deckelblech dennoch unbeschädigt bleibt. Diese zweite Nachformung und das Ergebnis nach einem Anbringen des Griffabschnitts zeigt das untere Halbbild der Figur 8a. Es versteht sich, dass sowohl in dem oberen wie auch dem unteren Halbbild der streifenförmige Vorsprung 20 sich senkrecht zur Papierebene erstreckt, in einer Querebene 101, welche senkrecht zur Längsmittelebene 100 verläuft. Diese Querebene 101 ist eine relative Angabe zu der Lage der Vorform 20*, in welcher eine Symmetrie der zunächst ausgeformten Vorform aus dem Deckelblech zur Ebene 101 vorliegt, welche dann aber beim Nachformen verlassen wird, wie der fertige Vorsprung 20 das in dem unteren Halbbild zeigt, in welchem er nicht mehr symmetrisch zu der Querebene 101 gelegen ist.This clarifies the FIG. 8a In which an implementation in the section is shown, wherein the section extends in the longitudinal direction, as dictated by the longitudinal mid-plane 100, for example, from the illustration of FIG. 5 and - practically realized - the schematic representation of the FIG. 8 corresponding. As far as reference numerals from the FIGS. 4, 5 and 8th Designate corresponding sections and parts there, they are in realization FIG. 8a taken over, here in the lower illustrated field. The upper illustrated field forms a preform 20 * which is formed in a two-stage manufacturing process prior to the second step (post-forming). For example, in a first embodiment FIG. 1 For example, the preform 20 *, which has a rather wall-shaped structure, is formed with two flat slopes and a strongly rounded central portion of the panel 10. For example, in a second postforming FIG. 2 creates the much steeper leading edge 20 "(after FIG. 4 ) or 20a after FIG. 8 , wherein the cover sheet still remains undamaged. This second reshaping and the result after attaching the handle portion shows the lower field of the FIG. 8a , It is understood that in both the upper and the lower field of the strip-shaped projection 20 extends perpendicular to the paper plane, in a transverse plane 101 which is perpendicular to the longitudinal center plane 100. This transverse plane 101 is a relative indication of the position of the preform 20 *, in which there is a symmetry of the initially formed preform from the cover plate to the plane 101, which is then left at the post-forming, as the finished projection 20 shows that in the lower half in which it is no longer located symmetrically to the transverse plane 101.

Die folgenden Ausführungen beziehen sich auf das untere Halbbild. Links nicht im Bild ist der Niet 11 gelegen, der zur Anbringung des Anbringungs-Abschnitts 31 am Deckelblech 10 verwendet wird. Das hintere Ende 31 c des Anbringungs-Abschnitts 31 ist die Randkante, welche der Vorderkante 20" des Vorsprungs 20 zugeordnet ist, ggf. unter Belassung eines schmalen Spalts 20', wie anhand von Figur 4 erläutert. Die Unsymmetrie mit einer scharfen Vorderkante 20" (oder 20a) und einer flacher verlaufenden, nach außen weisenden Randkante 20b charakterisiert den Vorsprung 20. Er hat dazuhin durch die Nachformung eine plateauförmige Oberseite 20c erhalten, welche ihn trotz der relativ flach erscheinenden Ausbildung noch eine sehr große Höhe h relativ zur Blechstärke erreichen lassen. Er hat aber eine wesentlich stärker ausgebildete Breite, die gegenüber der Höhe h größer ist, insbesondere etwa doppelt so breit als hoch, wobei der wesentliche Abschnitt des Vorsprungs 20 rechts von der Querebene 101 gelegen ist.The following explanations refer to the lower field. Left not pictured is the rivet 11 which is used to attach the attachment portion 31 on the cover plate 10. The rear end 31 c of the attachment portion 31 is the marginal edge, which is associated with the leading edge 20 "of the projection 20, possibly leaving a narrow gap 20 ', as with reference to FIG FIG. 4 explained. The asymmetry with a sharp front edge 20 "(or 20a) and a flatter, outwardly facing edge 20b characterizes the projection 20. He has also received by the reshaping a plateau-shaped upper surface 20c, which still makes him a very much despite the seemingly relatively flat appearance However, it has a much more developed width, which is greater than the height h, in particular about twice as wide as high, wherein the essential portion of the projection 20 is located to the right of the transverse plane 101.

Die Nachformung umfasst eine gestaltende Umformung der Vorform 20* mit einem Coining (einem Prägevorgang), um die Oberfläche 20c stärker abzuflachen. Bei diesem Nachformen wird das Werkzeug von oben und von unten gleichermaßen zur Ausbildung eingesetzt. Dabei kann anhand der links in der ansteigenden Flanke der Vorform 20* erkennbare leichte Knick in der unteren endgültigen Form wieder erkannt werden, woraus auch ersichtlich ist, wie die scharfe Vorderkante 20" in die zunächst flach ansteigende vordere Schräge des eingeformten Walls 20* eingebracht wird. Rechts von der Querebene 101 wird die zweite Schräge des Walls von unterhalb nach oberhalb ausgeformt, um etwa beginnend mit dem Rist des Walls 20* eine flache Form 20c zu bilden, die sanft im Bereich 20b in das übrige Deckelblech 10 überleitet.The reshaping involves shaping reshaping the preform 20 * with a coining (embossing process) to flatten the surface 20c more strongly. In this post-forming the tool is used equally from above and from below for training. It can be seen from the left in the rising edge of the preform 20 * recognizable slight kink in the lower final shape again, which also shows how the sharp leading edge 20 "is introduced into the first flat rising front slope of the molded wall 20 * To the right of the transverse plane 101, the second slope of the wall is formed from below to above, to form a flat shape 20c starting approximately at the instep of the wall 20 *, which smoothly leads into the remaining cover plate 10 in the area 20b.

Zusätzlich ist in der fertigen Form schon der angebrachte Anbringungsabschnitt 31 und auch der angebrachte Tab 30 nach Figur 3 angeordnet, ebenfalls in Schnittdarstellung. Dabei liegt der Tab mit seinem Zwischensteg zwischen der linken Öffnung und der Grifföffnung 32b im wesentlichen oberhalb des quer verlaufenden Vorsprungs 20. Die beiden Öffnungen des Tabs sind aus Figur 3 ersichtlich, eine Öffnung entsteht durch das Ausbilden des Anbringungsabschnitts 31, der über die Gelenklinie 38 weiterhin mit der Grifflasche 30 in Verbindung steht, während die Öffnung für das Eingreifen eines Fingers besonders ausgebildet wird. Diese Öffnung 32b ist Bestandteil des Griffabschnitts 32, wobei der zwischen den beiden Öffnungen liegende Steg 32a in Figur 8a leicht gewölbt dargestellt ist, mit einer vorderen Kante 32c, die in Beziehung zu der freien Kante 31 c des Anbringungsabschnitts 31 bei der Herstellung stand. Ein Großteil des Vorsprungs 20 liegt damit unterhalb des Steges und ist von außen kaum wahrzunehmen.In addition, the attached attachment portion 31 and also the attached tab 30 are already in the finished form FIG. 3 arranged, also in section. In this case, the tab lies with its intermediate web between the left opening and the handle opening 32b substantially above the transverse projection 20. The two openings of the tab are made FIG. 3 As can be seen, an opening is formed by the formation of the attachment portion 31, which continues to communicate with the grip tab 30 via the hinge line 38, while the opening for the engagement of a finger is specially formed. This opening 32b is part of the handle portion 32, wherein the web 32a lying between the two openings in FIG. 8a is shown slightly curved, with a front edge 32c, which was related to the free edge 31 c of the mounting portion 31 in the manufacture. A large part of the projection 20 is thus below the bridge and is hardly noticeable from the outside.

In diesem Zusammenhang der zweistufigen Ausbildung kann neben der Reihenfolge der Bearbeitung nach den Figuren 1 bis 3 auch eine modifizierte Reihenfolge vorgenommen werden, so zunächst das Einbringen der Vorformen, wie sie anhand der Vorform 20* des oberen Halbbildes von Figur 8a erläutert sind, in einem ersten Arbeitsgang, noch ohne Einbringen von Ritz- oder Kerblinien (als Schwächungslinien), wie die Schwächungslinie 16 eine ist. Dabei werden - sofern eine Mehrzahl von Vorsprüngen zum Sperren von Drehbewegungen eingesetzt werden - alle Vorformen ausgebildet. Das Einbringen der ersten Kerblinie findet dann gemeinsam in einem Arbeitsgang statt, der das Nachformen (weitere Ausbilden) der vorgeformten Vorsprünge übernimmt. Die Vorsprünge erhalten dabei das korrekte, ihnen zugewiesene Profil, wie am unteren Halbbild der Figur 8a erläutert, wobei dieses Profil nicht nur auf den quer verlaufenden Vorsprung 20, sondern auch auf die anderen Vorsprünge übertragen werden kann, soweit sie in dem vorhergehenden Arbeitsgang als Vorformen ausgebildet wurden. Damit kann erreicht werden, dass ein das Blech stark beanspruchender Kerbvorgang nicht schon dann erfolgt, wenn die das Deckelblech stark belastende Ausbildung der Vorform im ersten Arbeitsgang erfolgt. Beim Nachformen kann zeitgleich das Einbringen der Kerblinie vorgenommen werden. Bei der Nachformung wird - was aus Figur 8a ersichtlich ist ― die Wandstärke auf der Oberseite des Vorsprungs um etwa 10% bis 15% reduziert, bei gleichzeitig eintretender Verdichtung und Verfestigung dieses Bereiches, was durch den Prägevorgang (das Coining) von oben und unten gleichermaßen erreicht wird.In this context, the two-stage training may be in addition to the order of processing according to the FIGS. 1 to 3 also a modified order are made, so first the introduction of the preforms, as they are based on the preform 20 * of the upper half of FIG. 8a are explained, in a first operation, still without introducing scoring or score lines (as lines of weakness), as the line of weakness 16 is a. In this case - if a plurality of projections are used to block rotational movements - all preforms are formed. The introduction of the first score line then takes place together in one operation, which takes over the reshaping (further forming) of the preformed protrusions. The projections receive the correct, their assigned profile, as in the lower half of the FIG. 8a explained, this profile can be transferred not only to the transverse projection 20, but also to the other projections, as far as they were formed in the previous operation as preforms. It can thereby be achieved that a notching process which greatly stresses the sheet metal does not already take place when the cover sheet undergoes a heavy loading of the preform in the first operation. When reshaping the insertion of the score line can be made at the same time. During the reshaping - what is out FIG. 8a can be seen - the wall thickness on the top of the projection reduced by about 10% to 15%, with simultaneous entering compression and solidification of this area, which is equally achieved by the embossing process (the Coining) from above and below.

Andere Ausführungsformen von Vorsprüngen gehen aus den weiteren Figuren hervor. So zeigt Figur 6 eine Anbringung von zwei im wesentlichen punktförmigen Vorsprüngen 23a,23b an den Längsseiten 31 a,31 b des Anbringungsabschnitts 31. Zusätzlich oder alternativ kann ein Vorsprung 22 am Querrand 31c des Anbringungsabschnitts 31 vorgesehen sein. Der Vorsprung 22 kann länglich bis oval und auch im wesentlichen rund ausgebildet sein.Other embodiments of projections will be apparent from the other figures. So shows FIG. 6 an attachment of two substantially punctiform projections 23a, 23b on the longitudinal sides 31a, 31b of the attachment portion 31. Additionally or alternatively, a projection 22 may be provided on the transverse edge 31c of the attachment portion 31. The projection 22 may be elongated to oval and also formed substantially round.

Figur 7 veranschaulicht eine Gruppe von Vorsprüngen, die einem einzigen Außenrand (nach außen weisende Randlinie) des Anbringungsabschnitts 31 zugeordnet sind. Diese Gruppe 24 von hier drei einzelnen, im wesentlichen punktförmigen Vorsprüngen sind dem Außenrand 31 c zugeordnet, können aber ebenso den beiden anderen Randkanten 31 a und 31 b zugeordnet sein. Auch nur zwei punktförmige Vorsprünge sind in Figur 7 einsetzbar. Ebenso kann die unsymmetrische Gestalt der nach oben ausgeformten Vorsprünge gemäß Figur 4a oder der Figuren 5a oder 8a auf diese Ausführungsbeispiele übertragen werden. FIG. 7 Fig. 11 illustrates a group of protrusions associated with a single outer edge (outwardly facing edge line) of the attachment portion 31. This group 24 of here three individual, substantially point-shaped projections are associated with the outer edge 31 c, but may also be associated with the two other marginal edges 31 a and 31 b. Also only two point-shaped projections are in FIG. 7 used. Likewise, the unbalanced shape of the upwardly shaped projections according to FIG. 4a or the FIGS. 5a or 8a be transferred to these embodiments.

Wird der zumindest eine Vorsprung einer quer zur Längsebene 100 der Anbringungslasche 30 liegenden Randkante 31 c zugeordnet, kann mit nur einem einzigen Vorsprung eine Drehbewegung in beiden Richtungen unterbunden werden, wenn sich dieser Vorsprung zumindest beidseits der Mittelebene erstreckt. Wird dagegen ein Vorsprung gewählt, der einer parallel zur Längsebene 100 verlaufenden Randkante zugeordnet wird, sind für eine symmetrische Begrenzung von Drehbewegungen der Grifflasche 30 zumindest zwei Vorsprünge an zwei insoweit zur Verfügung stehenden Rändern als "stop edges" vorzusehen.If the at least one projection is associated with a peripheral edge 31c lying transversely to the longitudinal plane 100 of the attachment tab 30, rotational movement in both directions can be prevented with only a single projection, if this projection extends at least on both sides of the median plane. If, on the other hand, a projection is selected which is assigned to a peripheral edge extending parallel to the longitudinal plane 100, at least two projections on two edges available to this extent must be provided as "stop edges" for a symmetrical limitation of rotary movements of the grip tab 30.

Alle beschriebenen Vorsprünge sind außerhalb des Anbringungsabschnitts 30 angeordnet, so dass sie mit zumindest einer seiner jeweiligen Außen-Randkanten (Rand) sperrend zusammenarbeiten können.All described projections are arranged outside of the mounting portion 30, so that they with at least one of its respective outer peripheral edges (edge) can work together blocking.

Die Wirkung der Drehmomente ist an den Figuren 9a und 9b veranschaulicht. Dabei ist mit einem Blick von oben auf den Anbringungsabschnitt 31 angenommen, dass dieser über die Befestigungsstelle 11 (meist ein Nietkopf) am Panel 10 angeordnet ist. Schematisch ist ein parallel zur Mittelebene 100 des Tabs (der Grifflasche 30) liegender seitlicher Vorsprung 21a eingezeichnet, der mit einer Kraft durch eine angenommene Drehung in Richtung α belastet wird. Bei einer angenommenen Länge I des Anbringungsabschnitts 31, liegt die Befestigungsstelle 11 näher zu der Gelenklinie 38, als zum hintere Ende 31c des Anbringungsabschnitts 31, so dass ein wirksamer Kraftarm I1 größer als die Hälfte der Länge I des Anbringungsabschnitts 31 ist. Aufgrund der Platzierung des linien- bzw. streifenförmigen Vorsprungs 21 a nahe der hinteren Randlinie 31 c kann eine Kraft über einen großen Hebelarm ein großes Drehmoment zum Sperren (Sperrmoment) einer zu verhindernden Drehbewegung aufbringen.The effect of the torques is on the FIGS. 9a and 9b illustrated. It is assumed with a view from above of the mounting portion 31 that this is arranged on the attachment point 11 (usually a rivet head) on the panel 10. Schematically, a parallel to the center plane 100 of the tab (the handle tab 30) lying lateral projection 21a is drawn, which is loaded with a force by an assumed rotation in the direction of α. With an assumed length I of the attachment portion 31, the attachment point 11 is closer to the hinge line 38 than to the rear end 31c of the attachment portion 31, so that an effective force arm I 1 is greater than half the length I of the attachment portion 31. Due to the placement of the line or strip-shaped projection 21 a near the rear edge line 31 c, a force on a large lever arm can apply a large torque to lock (blocking torque) to prevent rotation.

In gleicher Weise kann die Aufbringung von Drehmomenten erläutert werden bei einem senkrecht zur Mittelebene 100 sich erstreckenden Vorsprung 20, der fast die gesamte Breite b des Anbringungsabschnitts 31 nahe dessen hinterer Randlinie 31 c einnimmt. Hier ist der (maximale) Kraftarm mit b1 bezeichnet und in erster Näherung spricht er nicht ganz, aber weitgehend der Hälfte der Breite b, eingezeichnet als Hebelarm b1 bei einer angenommenen (hypothetischen) Drehbewegung in Richtung α, wie eingezeichnet. Die entsprechende Kraft über den Hebelarm b1 wird von dem Vorsprung 20 bzw. dessen vorderer Randkante 20a (bei Figur 4 die Kante 20") aufgebracht. Nachdem die Ecke des Anbringungsabschnitts 31 leicht abgerundet ist, kann nicht die gesamte hälftige Breite als Hebelarm zur Verfügung gestellt werden, sondern zwischen 70% und 100% von b/2, im wesentlichen im Bereich zwischen 80% und 90%.In the same way, the application of torques can be explained with a perpendicular to the center plane 100 extending projection 20, which occupies almost the entire width b of the mounting portion 31 near the rear edge line 31 c. Here, the (maximum) force arm is denoted by b1 and in a first approximation it does not speak quite, but to a large extent half the width b, drawn as lever arm b 1 assuming a (hypothetical) rotational movement in the direction α, as shown. The corresponding force on the lever arm b1 of the projection 20 and its front edge 20a (at FIG. 4 After the corner of the attachment portion 31 is slightly rounded, not the entire half width can be provided as a lever arm, but between 70% and 100% of b / 2, substantially in the range between 80% and 90%.

Figur 10 veranschaulicht einen von der Innenseite des Blechdeckels sichtbaren, ausgedünnten Bereich um den Nietkopf 11 herum. Dieser Nietfuß-Bereich 11a ist ein Bereich, der nach dem zweiten Ausformen des Nietkopfes 11 auf der äußeren Seite zurückbleibt, meist sichtbar durch kreisförmige Linien um das Zentrum des Niets als Befestigungsstelle 11 herum. Dieser "button coin area" ist nicht stark belastbar, nachdem er von der Blechdicke her durch das Ausformen des Nietes nach außen ausgedünnt ist. Der Vorsprung 20, der eine Fläche f20 einnimmt, aber linien- oder streifenförmig ist, ist im äußeren Randbereich 11 b des Nietfußes angebracht, also weit aus dem gefährdeten dünnen Blechbereich heraus verlagert. Der Anbringungsabschnitt 31 ist ― nicht maßstäblich - strichliniert eingezeichnet, um die Relation der Lage der "Coin Area" zu verdeutlichen. Alternativ oder kumulativ zum am hinteren Rand 31 c liegenden eingezeichneten Vorsprung 20 können auch hier die zwei seitlichen Vorsprünge 21 a,21 b vorgesehen sein, die dann auch nahe des Peripheriebereiches des Nietfußes platziert sind und nicht in den gefährdeten ausgedünnten Bereich nahe des Nietkopfes verlegt sind. FIG. 10 illustrates a thinned area visible around the rivet head 11 from the inside of the lid. This rivet base portion 11a is a portion left after the second forming of the rivet head 11 on the outer side, usually visible by circular lines around the center of the rivet as the attachment point 11 around. This "button coin area" is not strong load, after it is thinned out of the sheet thickness by the shaping of the rivet to the outside. The projection 20, which occupies a surface f 20 , but is linear or strip-shaped, is mounted in the outer edge region 11 b of the Nietfußes, so far out of the vulnerable thin sheet metal area out. The attachment section 31 is shown by dashed lines, not to scale, in order to clarify the relation of the position of the "Coin Area". Alternatively or cumulatively to the lying on the rear edge 31 c drawn projection 20, the two lateral projections 21 a, 21 b may be provided here, which are then placed near the periphery of the Nietfußes and are not placed in the vulnerable thinned area near the rivet head ,

Eine genauere Bemessung der Flächen zeigt, dass der streifenförmige Vorsprung 20 zumindest teilweise außerhalb des Nietfuß-Bereiches (Coin Area) und hier des äußeren Peripheriebereiches 11 b gelegen ist. Die Herausverlagerung beträgt zumindest 40% der Fläche f20, die sich nicht mehr in der Peripherie 11 b des Nietfußes 11a befindet, sondern außerhalb. Optisch ist diese Lage und die Lage und Erstreckung der Coin Area ohne weiteres von der Innenseite des Blechdeckels zu erkennen.A more accurate dimensioning of the surfaces shows that the strip-shaped projection 20 is situated at least partially outside the rivet foot area (Coin Area) and here the outer periphery area 11b. The relocation is at least 40% of the area f 20 , which is no longer in the periphery 11 b of the Nietfußes 11 a, but outside. Visually, this location and the location and extent of the Coin Area can be seen easily from the inside of the tin lid.

Claims (39)

  1. Sheet metal lid for closing a can body, having a panel or surface (10) and a folded edge (12) surrounding this panel, suitable for attaching to the can body; wherein
    - a region suitable for opening is defined by a weakened line (16) on the panel (10) and outside of the opening region (17), a pull tab (30; 31, 32, 33) is arranged at a fixing point (11);
    - the pull tab (30) has a pull section (32), an opening section (33) and an attachment section (31), the latter for essentially parallel attachment of the pull tab with respect to the panel (10), wherein the pull tab (30) comes to rest in the attached state with its opening section (33) above the opening region (17), in order to be able to tilt the pull section upwards along a weakened or hinge line for breaking in the opening region (17);
    - the attachment section (31) has a laminar extension, which is less than one extension of the pull tab (30);
    - at least one barrier (20; 24a; 23a; 23b; 22) is arranged outside of the extension of the attachment section (31) to preset or to limit a maximum possible pivoting movement (α) of the pull tab (30) and
    - wherein at least one projection (20) as the barrier has a cross-section, which is designed (20", 21a') to be non-symmetrical in a direction lying transversely to its longitudinal extension.
  2. Sheet metal lid according to claim 1, wherein at least one projection (20, 21a, 21b; 23a, 24a) projects from the panel or lid surface (10) shaped as the at least one barrier in order to limit or to block pivoting of the pull tab (30) by contacting rest with respect to at least one outer edge (31c, 31a, 31b) of the attachment section (31).
  3. Sheet metal lid according to claim 1, wherein at least one strip-like projection (21a, 21b; 20) projects from the panel (10) shaped as the barrier close to at least one edge (31c) of the attachment section (31) to limit a pivoting movement (α) of the pull tab (30) about the fixing point (11).
  4. Sheet metal lid according to claim 1, wherein at least one projection is provided on the panel (10) as the barrier (21a, 21b; 20; 22; 24) outside of the attachment section (31) so that a considerable pivoting movement (α) of the pull tab (30) is blocked in a plane parallel to the panel, in particular the projection has a length of more than 80% of the width (b) of the attachment section.
  5. Sheet metal lid according to one of the previous claims, wherein the barrier (20, 22) extends over at least 30%, preferably over at least 50%, of a width (b) or a length (1) of the attachment section (31).
  6. Sheet metal lid according to one of the previous claims, wherein several projections (20, 22, 23a, 23b, 24) are provided close to the edge (31a, 31b, 31c) of the attachment section (31) as the barrier, in particular at least one projection (21a, 21b) is orientated in a longitudinal direction of the pull tab (30) and thus has a length which is no more than 50% of a longitudinal extension (1) of the attachment section (31), in particular in combination with a distance of the outermost end of the projection (21a, 21b) from the centre of the fixing point (11) of more than 50% of the longitudinal extension (1) of the attachment section (31).
  7. Sheet metal lid according to claim 6, wherein of the several projections, at least one (20, 21a, 21b, 22) is designed to be linear or strip-like, in particular the projection or the barrier has a greater width than height (h) and a considerably greater length than width.
  8. Sheet metal lid according to claim 6, wherein at least one of the several projections is designed to be round to oval (22, 24a, 23b).
  9. Sheet metal lid according to claim 4 or 7, wherein several strip-like projections (20, 21a, 21b) are provided, of which two projections do not have the same orientation (20, 21a; 20, 21b), in particular several projections are arranged close to several edges as edge sections (31a, 31b, 31c) of the attachment section (31).
  10. Sheet metal lid according to one of the previous claims, wherein limiting of a pivoting movement of the pull tab (α) in a plane essentially parallel to the panel (10) using the barrier is effected by abutting against at least one projection (20).
  11. Sheet metal lid according to one of the previous claims, wherein the barrier is arranged on the panel (10) as a projection between the pull section (32) and the opening section (33) of the pull tab.
  12. Sheet metal lid according to one of the previous claims, wherein the attachment section (31) is designed to be essentially rectangular, in particular is shaped to be square, and has at least three outer edge sections (31 a, 31 b, 31c).
  13. Sheet metal lid according to one of the previous claims, wherein the attachment section is connected to the remaining pull tab (30) via a hinge line (38), so that on actuating the pull section (32), the opening section (33) can be tilted essentially vertically to a plane of the panel (10).
  14. Sheet metal lid according to claim 13, wherein the tilting movement, as vertical pivoting, causes opening of the opening region (17) along the weakened line (16).
  15. Sheet metal lid according to one of the previous claims, wherein the pivoting barrier is also retained during a vertical tilting movement of the pull tab (30).
  16. Sheet metal lid according to claim 6 or 9, wherein the several projections are arranged so that during horizontal pivoting of the pull tab (30), in each case one contacts another of several outer edge sections (31a, 31b, 31c) of the attachment section.
  17. Sheet metal lid according to claim 1, wherein the non-symmetrical design contains (21b', 21b"; 20a, 20b) a steeper and less steep flank, which do not run parallel, in particular the at least one projection (20) is designed to be flattened (20c) on its upper side, is thus preferably reduced in its wall thickness.
  18. Sheet metal lid according to claim 17, wherein the steeper flank (21b', 20a) is placed closer to an associated outer edge section (31b, 31a, 31c) of the attachment section than the less steep flank of the same projection.
  19. Sheet metal lid according to one of the preceding claims, wherein as the barrier, at least one projection (20; 21a, 21b) has a height (h) which is greater than 300 µm, measured from an outwardly pointing upper side of the panel (10) around the projection.
  20. Sheet metal lid according to claim 19, wherein the height (h) is matched essentially to a height or thickness of the sheet metal of the attachment section (31), to achieve blocking or obstructing of a pivoting movement of the attachment section (31).
  21. Sheet metal lid according to claim 20, wherein the height (h) of the at least one projection (20; 21a, 21b) is not less than essentially the thickness of the sheet metal at the particular outer edge section (31a, 31b, 31c) of the attachment section (31).
  22. Sheet metal lid according to one of the previous claims, wherein the barrier is shaped as at least one projection by first-forming from the panel (10) and has been brought to its final shape by post-forming, in particular during post-forming a thickness reduction of an upper side (20c) of the projection (20) has taken place.
  23. Sheet metal lid according to claim 22, wherein of two longer flanks (21b', 21b") of the projection, one thereof is or has been designed to be steeper during reforming.
  24. Sheet metal lid according to one of the preceding claims, wherein as the barrier, at least one projection (20) is placed in a peripheral region (11b) of a rivet base region (11a) which is visible from the inner side in the lid sheet metal.
  25. Sheet metal lid according to claim 24, wherein a part of the projection (20) is placed outside of the rivet base region (11a).
  26. Sheet metal lid according to claim 24, 25, wherein more than 40% of a surface (f20) of the at least one projection is placed outside of the rivet base region (11a).
  27. Sheet metal lid according to claim 25 or claim 26, wherein the rivet base region (11a) extends annularly around the rivet (11), which is visible from the inner side, as the fixing point.
  28. Sheet metal lid according to claim 24 or 27, wherein the projection is placed like a type of secant to tangent as a strip or line in the edge region (11b) of the rivet base region.
  29. Sheet metal lid according to claim 1, wherein the lid panel (10) as the barrier has at least one projection (20, 21a, 21b, 23a, 24, 22), which extends upwards from the lid panel (10) and provides a front stop edge (21b', 21a', 20"), to at least limit a horizontal rotation (α) of the pull tab (30) as a whole, in particular two stop edges are designed essentially parallel to a longitudinal plane (100), which extends along the length of the pull tab (30).
  30. Sheet metal lid according to claim 29, wherein the front stop edge (20") is linear, and wherein the attachment section (31) occupies a flat position to the lid panel (10).
  31. Sheet metal lid according to claim 29, wherein the front stop edge extends over more than half a width or at least 30% of the length (1) of the flat attachment section (31).
  32. Sheet metal lid according to claim 29, wherein the front stop edge (20", 20a) is aligned essentially vertically to a longitudinal plane (100), which extends along the length of the pull tab (30), in particular the projection is shaped from the lid surface in a region which corresponds to a periphery of a rivet base region or embossed region (11a) around the attachment point (11).
  33. Sheet metal lid according to claim 29, wherein the projection (20, 21a, 21b) is or has been shaped at least twice, once to form a front stop zone from a section of the lid surface (10) and once to post-form the stop zone into a shape or to form a shape which as a stop edge (20") is steeper or sharper than the previously formed stop zone.
  34. Sheet metal lid according to claim 9 or claim 6, wherein three projections (21a, 21b, 20) are provided, of which two are orientated essentially parallel to the longitudinal axis (100) of the pull tab and one (20) is orientated essentially vertically thereto.
  35. Process for shaping a sheet metal lid, wherein at least one projection (20, 21a, 21b) in the panel (10) is shaped twice, once for shaping a preform (20*) of the projection as a stop zone from the panel (10), which preform is placed close to an attachment section (31) of a pull tab (30), but remote from a fixing point (11) for the pull tab, and once for post-forming a front edge (20", 21b') of the at least one projection as a stop zone into a shape or to form a shape which as a stop edge (20") is steeper or sharper than the previously formed stop zone in order to obtain a barrier for an assigned outer edge section (31c) of the attachment section.
  36. Process for a sheet metal lid according to claim 35, wherein a reduction of the sheet metal thickness of the projection is effected by an embossing process.
  37. Process according to claim 35, wherein moulding of a notch line (16) into the panel (10) is effected in time after shaping of the preform (20*) of the at least one projection (20).
  38. Process according to claim 35, wherein post-forming comprises embossing, with which an upper side (20c) of the preform of the projection (20) is flattened and stiffened.
  39. Process according to claim 38, wherein stiffening is achieved by reducing the sheet metal thickness by at least 10%.
EP03808250A 2003-01-13 2003-12-23 Fixing the position of a pull-tab with an anti rotation bead formed from the panel Expired - Lifetime EP1583621B2 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE10300914 2003-01-13
DE10300914A DE10300914B4 (en) 2003-01-13 2003-01-13 Positional fixation of a grip tab on a beverage can lid and method for molding this lid
DE10319971A DE10319971A1 (en) 2003-01-13 2003-05-05 Positional fixation of a grip tab with a blocking bead formed from the panel
DE10319971 2003-05-05
PCT/DE2003/004283 WO2004065034A2 (en) 2003-01-13 2003-12-23 Fixing the position of a pull-tab with an anti rotation bead formed from the panel

Publications (4)

Publication Number Publication Date
EP1583621A2 EP1583621A2 (en) 2005-10-12
EP1583621B1 EP1583621B1 (en) 2006-08-30
EP1583621B8 EP1583621B8 (en) 2007-03-07
EP1583621B2 true EP1583621B2 (en) 2010-10-20

Family

ID=32773135

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03808250A Expired - Lifetime EP1583621B2 (en) 2003-01-13 2003-12-23 Fixing the position of a pull-tab with an anti rotation bead formed from the panel

Country Status (10)

Country Link
US (1) US7926675B2 (en)
EP (1) EP1583621B2 (en)
AT (1) ATE337866T1 (en)
AU (1) AU2003303755A1 (en)
BR (1) BR0317990B1 (en)
DE (2) DE10319971A1 (en)
HK (1) HK1078517A1 (en)
PL (1) PL202694B1 (en)
RU (1) RU2340523C2 (en)
WO (1) WO2004065034A2 (en)

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DE10300914B4 (en) * 2003-01-13 2010-03-04 Ball Packaging Europe Gmbh Positional fixation of a grip tab on a beverage can lid and method for molding this lid
US20060016815A1 (en) * 2003-11-03 2006-01-26 Hajo Rieck Anti rotation bead
EP2612823A1 (en) * 2012-01-03 2013-07-10 Anheuser-Busch InBev S.A. Can comprising a maxi-dispense opening and a vent opening
US8950619B2 (en) * 2012-05-04 2015-02-10 Ball Corporation Metallic end closure with tear panel having improved rigidity
US8966865B2 (en) * 2012-07-09 2015-03-03 Silgan Containers Llc Can end and related method
US9181007B2 (en) 2013-03-12 2015-11-10 Rexam Beverage Can Company Beverage can end with vent port
US9114451B2 (en) 2013-03-15 2015-08-25 Ball Corporation Container end closure with buckle control feature
US9033175B2 (en) 2013-03-15 2015-05-19 Ball Corporation End closure with double anti-missile score
US9033174B2 (en) 2013-03-15 2015-05-19 Ball Corporation Easy access opening tab for a container end closure
CN105745156A (en) 2013-11-20 2016-07-06 鲍尔公司 Container end closure with a score feature
HRUM20230003U2 (en) 2023-02-21 2023-06-09 TVD System d.o.o. Prefabricated building block with ready-made heat insulation for the facade

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Also Published As

Publication number Publication date
BR0317990B1 (en) 2014-09-02
BR0317990A (en) 2005-12-06
PL202694B1 (en) 2009-07-31
ATE337866T1 (en) 2006-09-15
WO2004065034A3 (en) 2004-09-16
WO2004065034A2 (en) 2004-08-05
DE10319971A1 (en) 2005-01-27
AU2003303755A8 (en) 2004-08-13
RU2340523C2 (en) 2008-12-10
HK1078517A1 (en) 2006-03-17
EP1583621B8 (en) 2007-03-07
US7926675B2 (en) 2011-04-19
DE50306412D1 (en) 2007-03-15
US20070062950A1 (en) 2007-03-22
PL376345A1 (en) 2005-12-27
EP1583621A2 (en) 2005-10-12
RU2005125734A (en) 2007-02-20
EP1583621B1 (en) 2006-08-30
AU2003303755A1 (en) 2004-08-13

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