DE2507033A1 - ENVIRONMENTALLY FRIENDLY CONTAINER LOCK - Google Patents

Description

Dr. E. Boettner
Dipl.-Ing. H.-J. Garbage * _c

Dr. Th. Berendt

D 8 Mu η just 80 As / P

LucUe-Grahn-Sar. 38, TeL 4ΰ 513S

KAISER ALUMINUM & CHEMICAL CORPORATION, 300 Lakeside Drive, Oakland, CaI. 94604- (V.St.A.)

Environmentally friendly container lock

The invention relates to an easy-to-open container closure made of metal, in particular to such a closure with one or more pre-formed tongues which can be pressed in by hand when the contents of the provided with the closure Container should be made accessible. The tongues of a fastener according to the invention are made by simply pushing them in not severed from the associated closure so as to avoid losing them and, as in the case the conventional pull tabs with pull rings, contribute to environmental pollution.

At present, most common devices have for easy Opening of metal container closures on cans for drinks or the like. Pull rings or tear tabs with metal pull rings. These rings or tongues can easily be torn off and lead from the container closures in question when they are opened usually not in a garbage can, but often simply

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be thrown on the ground or overboard from a boat, to pollution and possible threats to the wildlife in the water or by people who go barefoot in areas where such tear-off tongues are on the ground.

Separable metal pull rings or tongues not only cause so significant garbage problems that already in at least one State the use of containers with such rings on whose territory has been banned, but require them also a substantial number of precision work or processes and additional metal in the manufacture. Because the pull ring is normally attached to a rivet which is made in one piece with the closure member, must when attaching the Ring on the rivet, care must be taken to avoid damaging or weakening the rivet, otherwise the closure member does not pass the quality test customary during manufacture.

Attempts have also been made to resolve the various difficulties that occur in connection with pull ring closures, to be eliminated by moving towards such detachable pull rings In favor of push-button tongues produced in one piece with the actual closure member was dispensed with. Examples of such Snap tongues for locking links are in US-Psen 2 120 186,

2 187 ^ 33, 2 261 117, 3 362 569, 3 246 791, 3 355 058, 3 779 417,

3 76O 752, 3 759 206, and in the registered design patent (226 171) page 9 of the "Wall Street Journal", May 23, 1973, and in DT-OS 2 3 ^ 1 077 of April 18, 197 ^. B _e i the easy-to-open container closures according to the last two issued US patents, the push-button tongue is designed in such a way that it is initially completely cracked during manufacture or separated from the actual container with the exception of a small pivot point (a hinge) and then in their position is pushed back and sealed to the actual container closure by means of a suitable synthetic sealant, but it is difficult to make these plastic-sealed closure tongues leakproof and hygienic in mass production

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and their manufacture is because of the large number Complicated manufacturing steps and the necessary tooling and sealing material! s still necessary relatively expensive.

The development of the present easy-open closure is an attempt to eliminate the difficulties of making and using known push-button container closures, e.g. made of a suitable ductile metal. The V _e rschlußglied is easy to open with improved push-button-like collapsible tongue elements provided which are formed with the metal of the container closure in such a manner integrally, that they are not completely broken during manufacture or separately from the actual closure, so that they no subsequent sealing with a plastic material or the like. require more as required by U.S. Patent 3,759,206.

Each of the push-button-like push-in tongues of the closure member holds until the one provided with this closure member is opened Any outward pressures caused by the Container contents are developed. Nevertheless, these impressions can be easily handled by the user and under relatively Simply open with the pinger with little effort without the aid of a special tool. If the one with the Closure member provided with a tongue is opened, the tongue remains during the emptying of the contents from the container in their depressed or recessed position. The tongue is not intended or allowed to move when it is pressed down in the course of opening the container can be separated from this unintentionally.

The merits of the improved, easy to open and yet

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push-button-like indentations resistant to internal pressure, according to the invention are based on the new construction, arrangement and position of the angle of the actual tongues and the associated base parts and predetermined breaking points. The construction, arrangement and angular position of the base and the predetermined breaking points of the push-in locking tongues in relation to the remaining parts of the same and the associated connections connecting links ^ as selected hollow embossed parts of the connecting links, ensure the stress concentration in the predetermined breaking areas of the tongues during opening and for the Resistance to internal pressures up to the opening of the contents of the container to be developed.

In a preferred embodiment of the invention, as will be described below, different parts of the button-like elements or push-in tongues are arranged in such a way that they form opposing and overlapping geometric cone-like figures which contribute to a targeted distribution of the stresses on the predetermined breaking points, so that when the tongues are pressed in, the break is created, but until the opening is made the resistance to breakage is maintained as a result of the internal pressure developed by the contents of the container provided with the depressible locking tongues.

To protect the tongues that can be pushed in and to prevent the unwanted Opening the same during the usual crimping and sealing of the end closure member to a metal container, for example on a beer or beverage can as well as during other handling and stacking processes ^ are in another advantageous embodiment of the invention on the end closure member with a push-in tongue according to the invention means such as suitable upwardly directed embossments or Corrugations, similar to those according to US Pat. No. 3 ^ 50,301, are provided.

Save for the improved metal container lock with the improved ones compressible tongue elements refers to the invention

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application also to an improved method as well as an improved one Device for the production of such container closures, which is made possible by a far-reaching simplification of the eye equipment and distinguish the process steps from the familiar.

It should be pointed out here that in the following the terms "closure member" or "end closure ^11" in the description and in the claims are intended to denote closures which are made of any types of suitable ductile metallic materials such as steel, tinplate, aluminum and aluminum alloys and others for manufacture The container closures are made of suitable metallic materials and, if necessary, provided with relatively thin plastic films and coatings, which are conventionally provided to protect the metal against the contents of the container and vice versa, and that these designations also apply to container closures with a shape deviating from the circle relate.

The invention thus creates an easy-to-open, environmentally friendly one Closure member for containers and a method and a device for the production thereof. The closure member has hinged, easily depressible opening tabs or buttons, which are due to the new design and arrangement of the buttons, their base parts and their predetermined breaking points, which lead to a targeted concentration of stress on the Contribute predetermined breaking points during opening, not easily separate from the closure member during the pressing permit.

Some preferred embodiments of the invention are shown, for example, in the drawing.

Fig. 1 is a top plan view of an easy open container closure member according to the invention;

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Fig. 2 is a section along the line 2-2, in Figs illustrates the normal in broken lines Position that buttons or depressed inward Assume tongues after pressing in and pivoting about the pivot points concerned;

Fig. 3 is a section taken along line 3-3 in Fig. 1;

Fig. 3A is a section through the predetermined breaking portion of the crushable Button or the tongue according to FIG. 3 in the section indicated by the line 3A in FIG. 3 in a larger detail Scale showing additional parts;

Fig. K is a section along the line hk in Fig. 1;

FIG. 4a is a section of a depressible tab, similar to FIG. K, imaginary showing Verlängerungslxnxen by the sections of the various parts, such as base, predetermined breaking point and side wall parts of a tongue, to illustrate the nature of the relationship of the opposite directions geometrical conical sections from which the tongue exists;

FIGS. 5 to 8 illustrate various working steps and tools for use in making one having the improved push-in tabs Closure member with stiffening hollow embossing according to the invention;

FIG. 9 is an enlarged sectional view of the FIG. and 10 of the section delimited by the line 9-9 to illustrate the manner in which the tools the improved predetermined breaking point of a depressible tongue for the container closure according to the invention produce;

Fig. 10 is a partially broken sectional view

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a typical press with the improved tools! 5 to 8 for use in the manufacture of container closures according to the invention!

Figure 11 is a sectional view of an alternate embodiment of tooling for use in manufacture a modified form of a closure member according to the invention;

Fig. 12 is an end view of the fixed die portion of the Tool taken along line 12-12 in Figure 11;

Figure 13 is an end view of the movable die portion of the tool set taken along line 13-13 in Figure 11;

Fig. 14 is a perspective view of another modified embodiment of the end closure according to FIG of the invention with at least one depressible tongue and upwardly directed stiffening protective hollow embossments;

15 is a top view of an end closure according to FIG. ₉ rotated by 180 °;

Figure 16 is a section taken along line 16-16 in Figure 15;

Fig. 17 is a broken sectional view of a modified one Embodiment of tool equipment for Use in conjunction with the tools according to FIGS. 9 and 11 to 13 during the manufacture of the modified embodiment of a container closure according to FIGS. 14 to 16 in open position;

Fig. 18 is an end view of the fixed tool part of the tooling of Fig. 17 along the line 18-18;

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19 is an end view of the movable part of FIG Tool equipment according to FIG. 17 »according to line 19-19;

Fig. 20 is a section taken along line 20-20 of Fig. 18 with parts removed;

Fig. 21 is a section taken along line 21-21 in Fig. 18 with parts omitted in a somewhat enlarged manner Scale;

FIG. 22 is a section taken along line 22-22 in FIG. 19 with parts removed at approximately 180 degrees rotated position;

FIG. 23 is a section along the line 23-23 in FIG. 19 with the omission of parts in a position also rotated by about 180; and

FIG. Zk is a fragmentary plan view of the smaller push-button tongue of the container closure according to FIG. 15 to “illustrate a modified form of the same on a larger scale.

The improved container closure 10 in the embodiment according to FIG. 1 to kA generally consists of an outer reinforcing edge 12, which is to be flanged in the usual manner on the upper edge of a container, for example a beverage container, and a central field or area 14. The closure member 10 has Furthermore, the usual lower edge reinforcement rib 16 and a bulge 18 of suitable design, for example in the form of a hemisphere or a truncated cone, which is arranged in the middle part of the field 14 in an embodiment of the invention.

In a preferred embodiment of the invention is

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on both sides of the central bulge 18 between the tlieser and the circumferential rib 16 a push-button-like element or a depressable opening tongue 20 which can be operated by the user with the finger and allows access to the contents of a container provided with the closure member 10. The bulge 18 has several functions. First, amplified and it strengthens the field of 14 V _e rschlußgliedes. Secondly, it reduces the flexibility of the field i4 by stiffening it and thereby supporting the concentration of stress in the predetermined fragments of the depressible tongues 20 when they are opened.

In said preferred embodiment of the invention

t '

The depressible tongues 20 can advantageously have primary (first) and secondary (second), essentially circular base parts 21 and 22, respectively. The base parts 21 and 22 are preferably vertically offset, and at least the upper parts thereof are preferably horizontally offset from one another and at the same time arranged concentrically and connected to one another by a web part Zh arranged at an angle. In a preferred embodiment of the invention it is provided that the inner end of the base part 22 merges into the bottom of the upwardly projecting wall 26 of a dome-like finger grip part 27. This dome-like section 27 can take various forms. In one embodiment of the invention, it is hemispherical or, as indicated in broken lines in FIG. H, frustoconical.

As particularly indicated in Figures 3, h and 4A, the first and second base portions 21 and 22, which have similar strength properties as a tire, lie at selected angles with respect to one another, with the first base portion inclined generally upward and inward while the second base portion 22 is inclined generally inward and downward until it merges with the bottom of the side wall 26 of the dome-like portion 27.

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The web 24, which connects the base sections 21 and 22 together, has an annular predetermined breaking line 24 ', which in a preferred embodiment of the invention extends over most of the length of the web 24 and is only interrupted by the hinge from section 25 and merges into this. In one embodiment of the invention, this hinge section 25 can be arranged close to the middle section of the field 14 on a line transverse to the stiffening rib 16 and facing away from it. The predetermined breaking portion 24 'is of much less thickness and more brittle than the adjacent base portions 21 and 22. Therefore, as will be described in more detail below, when an inward force is exerted directly on the dome-like portion 27 of the tongue 20 by the user with the finger inward force concentrated in the region of the predetermined breaking line 24 ¹ , so that it breaks easily when the stress accumulates along the same. When the predetermined breaking line 24 * of a tongue 20 breaks, which usually begins directly opposite the somewhat downwardly directed hinge 25, the dome-shaped section 27 is pivoted downward and inward about the hinge 25, as shown in broken lines in FIG normally the tongue is completely separated from the closure member 10.

In an advantageous embodiment of the invention (Fig. 4a) the various inclined surfaces 21, 22 as well as the inclined web portion 24 'and the normal plane or the inclination of the wall 26 of the dome-shaped portion 27 in. In the area of their connection to the base 22 in the imaginary projection along the dash-dotted lines in FIG. 4a, two geometric conical surfaces X and X ¹ open at the top and two opposite downwardly open geometric conical surfaces Y and Y , B, C and D at the periphery of the compressible tongue 20, and of these, C is generally the transition point between the wall 26 of the

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shaped section and the base 22. The conical surfaces X and Y ¹ are slightly deeper (steeper) than the conical surfaces X ¹ and Y, and in a preferred embodiment of the invention, the vertices of all conical surfaces are aligned.

The relationship between the various parts that make up the tongue 20, for example the base sections 21, 22, the web 24 and the ¥ and 26, which are to be regarded as parts of the imaginary projected conical surfaces, is important when using the dome-shaped section 27 and for the relatively easy tearing at the predetermined breaking point 24 'when a small inward force is exerted on the dome-shaped section 27 with the finger by the user. Because of the small thickness and the solidification of the weakened line 24 'of a tab 20, in conjunction with the relationship and the cooperation of the oppositely directed conical surface projections X, X ¹ and Y, Y ¹ as well as the above-mentioned protrusion, for example, the protrusion 18 of the V _e rschlußgliedes . the force initially exerted by the dome-like section 27 during an inward movement during opening is transmitted via the inclined second base section 22 directly to the predetermined breaking line 2k ¹ , at which the concentration of stresses thus achieved; which are probably primarily tensile stresses, inevitably cause rapid tearing or breaking at the line 2k ·. In other words, the base sections 21 and 22 resist the inwardly directed force exerted by a coupling section 27 and quickly translate or convert this into the aforementioned tensile stresses in the residual or predetermined breaking line section 24 '. At the same time, as can be observed with reference to FIG. 4A, the intersection point D of the base of the imaginary conical surface X projected from the web 24 and that projected from the normal surface or inclination of the wall 26 in the region of the transition between this and the base 22 Base of the imaginary opposite conical surface Y ¹ slightly below the predetermined breaking line 24 ', so that a break in the line 24' is opposed only little resistance.

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In connection with another factor which influences the break at the line 24, it should be noted that during the manufacture of the depressible tongue, the cross-sectional thickness of the predetermined breaking part 24 'of the web portion 24 is substantially reduced compared to the other cross-sectional parts of the field area 14 of the closure member 10 by exerting deformation pressures by means of a tool on the web section 24 in such a way that grooves are preferably formed in the area of the predetermined breaking line Zh by pinching from both sides, with a substantial solidification of the web Zh occurring in this area. This solidification results in the grain structure distortion shown schematically in FIG. 3A for the predetermined breaking line Zh ' , in which the values of the yield and tensile stresses of this region 24' of the link 10 are relatively closely approximated to one another. The reduction in thickness of the metal in the area of the predetermined breaking line 24 'and at the same time maintaining a greater thickness of the hinge 25, which comes closer to the original thickness of the blank of the closure, has a significant reduction in the toughness of the material in the area of the predetermined breaking line Zh ^x compared to the rest of the material as well as a higher brittleness at this point. In the finished product, if relatively small tensile stresses are concentrated in the predetermined breaking line Zh ^1, it will tear easily because of its weakening and embrittlement.

In contrast to the ease with which the line 24 'at Exerting an inward force on the dome-like Section 27 tears completely from the outside, this predetermined breaking line 24 'is thanks to its angular inclination with respect to the base sections 21 and 22 as well as on field 14 as a whole in the club with the tire-like strength properties of the base sections 21 and 22 extremely resistant to stresses, which result from the internal pressure which may be developed by the contents of the can equipped with the closure 10.

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Figures 5 to 8 illustrate graphically and schematically for a preferred embodiment of the invention, a two-stage cold working process without prior annealing, which can be used for pre-forming and finishing of depressions or buccles in the closure member 10, which Finally, the bulge 18 and the depressible tongues of such a locking slide are intended to form. With this one two-step process, tools such as those generally shown in FIGS. 5 through 8 can be used if these on a hollow embossing press 28 with two forming stations of of the general type shown in Figures 9-13 will. The closure members 10, which may have been previously provided with a thin plastic coating, can intermittently the Are transported one after the other from the first to the second station of the press in a known manner during the stroke change. The means for feeding the closure members 10 to the individual stations can consist of a normal, somewhat flexible metal band ¥ (broken lines in Figs. 10 and 11) consist of that is provided with openings at suitable intervals for receiving the closures and for intermittent transport the closure members 10 serve from the first to the second station in the manner of a conveyor.

In general, the initial formation of the hollow embossings or bumps in the field area Ik of the metal closure member, which should ultimately result in the central bulge and the depressible tongues 20 according to FIG Hollow embossing elements, for example three hemispherical shaped pins or embossing punches 50, is exposed. Two of the originally formed bumps are then further deformed in the second station to form a central, dome-shaped section 27 and two base sections 21 and 22, which are connected to one another by a web section Zk consisting of the predetermined breaking line 2k ' and the hinge 25.

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As shown in Fig. 10, one type of press can be used in embossing the easy-open closure According to FIG. 1, a normal fixed lower plate 30 and a movable upper embossing section cooperating with this exhibit. The plate 30 is provided with bores 32 inside which sockets or sleeves 33 for receiving the centering pin members 34 are fixedly mounted. The centering pin 34 can be part of the lower embossing segment of station (i) an embossing pin 50 and be designed as part of the lower fixed embossing segment 37 at the station (2).

The upper embossing device 36 of the station (i), which is connected to the lower embossing segment 35 cooperates, has a movable embossing segment 40, which with an upper spacer 42 and a series of countersunk sections 43, 44 and 45 which is the embossing cavities 43 ', 44' and 45 'to the lower Share form. The embossing segment 40 is surrounded by an elastically loaded centering ring 46. The upper embossed border is attached to the movable upper embossing section 31 by means of (not shown in Fig. 10) conventional machine screws attached and, as in the case of the lower stamping segment 35 with the usual centering shaft or pin 34 provided in those into the opening 32 of the movable embossing section 31 fitted socket 33 engages.

The centering ring 46 is in held its position on the shoulder 39 of the upper. Embossing segment 40 can be placed on, and the ring 46 is in relation to the stamping segment 40 by means of the normal spring elements 47 loaded into several cavities 48 in the upper part of the rubble of the ring 46 are used. When the ring 46 is spring loaded with respect to the stamping segment 40, the lower nose portion is 49 of the ring normally advantageously in a held advanced position with respect to the lower parts of the stamping segment 40, which the stamping cavities 43 ', 44' and 45 · contains. The nose portion 49 of the ring 46 fits

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while in the bead 16 of the closure member 10 and serves to this in contact with the embossing pins 50 of the lower embossing segment 35 to hold and the closure member during the embossing activity in station (i) with respect to the upper and lower embossed sign 35 and ^ O, respectively, in station (i).

The pins 50, which are inserted into the bores 51 of the stamping segment 35, have collars or shoulders 51 ′ which are inserted into the countersinks 52 of the pin holder or of the lower fixed stamping segment 35. If desired or necessary, suitable spacers or shims 5 ^ can be inserted between the bed or platen 30 of the press and the pin holding segment 35 before the segment 35 is fastened to the bed of the press by means of the usual socket head screws 55. If the centering pin 3k is formed in one piece with an embossing pin 50, the insert 5k for such a pin 50, as shown in FIG. 10, should be provided with an opening 10. It should be noted that the entire press system 28 is combined with the usual

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acting lower and upper striking links 57 and 57 * is the movement of the movable hollow embossing part 31 of the press with respect to the fixed lower part 30 of your choice limit.

The station (2) of the press 28 is equipped with an embossing set consisting of a lower and an upper embossing set segment 37 and 56, respectively. A stamping insert 59 is fitted into each of the twin bores 58 of the lower stamping segment 37 and is held in place by a main screw 60 and a lateral pin 61. Since both embossing inserts 59 are of the same construction and the same design, the description of one is sufficient. The embossing insert 59 is provided with several aligned bores 62, 63 »6k. The bore 62 communicates with air holes 62a at the bottom and opens into a generally frustoconical surface 66 at the top, while the ßohrung 6k is provided with a thread and is used to accommodate the dimensions.

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Machine screw 6O for anchoring the insert 59
serves in the embossing segment 37 in the usual manner.

According to Fig. 5 to 10, particularly Fig 9 _S * go to the outer edges of the overturned frustoconical surface 66 in an annular stepped shoulder portion 68 of the embossing insert 59 via, and
this is of particular importance in the formation of the web parts 24 including the predetermined breaking line 24 'of a depressible tongue 20. As shown in FIG. 9, the stepped tongue consists of
Shoulder part 68 in vertical section from a small plane
Base 67, a vertical wall 69 · which merges into the upwardly and outwardly inclined surface? 0, to which a
flat upper surface 72 adjoins, which merges into a further downwardly and outwardly inclined embossing surface 73. A gentle curve 74 adjoins the outer edge of the embossing surface 73 and ends at the vertical wall of the embossing insert 59. When molding (see particularly Fig. 9) is the outermost section
the tongue base 21 is supported together with the outermost part of the field 14 from the upper edge region of the embossing insert 59.

The upper stamping segment 5 ^ (Fig. 9) »which cooperates at the station (2) with a lower stamping segment 37 is also on
the movable press platen 31 in a similar manner by means of
a pin or shaft 34, etc. attached like the lower one
Embossing segment 37 on bed 30 of the press. Similar to the upper stamping segment 40 in the station (1), the stamping segment is also surrounded by a centering ring 46 with the associated parts, which corresponds in construction and mode of operation to the centering ring 46 for the stamping segment 4o. The embossing segment 56 can also be provided by means of a shim or disk 42 and
is attached to the press plate 31 by means of screws 73 ', for example.

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is
ι »λ« rT _r ; esegiionc 50 / rni.t a pair of bore. η 1--0 , of which only one is shown and which serve to accommodate the pra ^ ee inserts ö2, which work together ^; .: - iit the associated lower milling inserts 59 the pressable tongues 20 and the d <.. with connected parts of the field 14 as well as the bulge 18 of the verscbluiägliedes 10 finished shapes and forms »Yes, the two ^{stamping inserts ς} > 2 gieicii are formed, the Description of the one.

The insert 82 is fastened in the bore 8G in a conventional manner by means of a machine screw 33 in a position determination and security pin 84 Similar spacers 86 can be used on the lower inserts 59. The nose portion 87 of an insert '6Z is provided with a hemispherical embossed cavity 88 for receiving the initially formed indentation or hump (Figs. 7-10) which is later to form the dome-like portion 27 of the depressible tongue or button 20.

The embossing cavity 88 has a smaller Üandabtaessung than the inversely frustoconical surface 66 of a lower embossing insert 59 and faces this, while in cooperation with the surface 66 in the manner still to be described, a tongue 20 is formed on the lower portion of the embossing segment 56 by means suitable machine screws 90 (for example shown in broken lines in Fig. 7), separated from the main part of the stamping segment 59 by spacers 91, a split insert guide and protective plate 92 attached.

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The segments 93i that make up the plate 92 are with Openings 94 provided with the openings 80 for receiving of the nose portion 87 of the embossing insert 82 can be aligned are.

The lower part of the hemispherical cavity 85 (FIG. 9) ends in a flattened circular ring-shaped surface 81 which delimits it and which is adjoined by an annular stepped shoulder section 96. This shoulder section 96 is of particular importance because when the various embossing elements are placed against each other at the station (2), in cooperation with the opposite stepped shoulder section 68 of the embossing insert 59 in the shape zone Z (FIG. 9), it forms the web part 24 of the press-in pliers 20 , which consists of the predetermined breaking line 24 '· and the hinge 25. In this connection it should be noted that a suitable area of the shoulder portion 96 for forming the generally downwardly directed tongue hinge 25 is hollowed out or cut out simultaneously with the formation of the break line 24 * in the manner shown at 91 (Fig. 7 and S).

The shoulder portion 96 , seen in vertical section, has an upwardly and outwardly inclined surface 98, which is followed by a short vertical wall 100 which merges into a flat surface which is at a suitable angle to the edge 100. The surface 102 merges into the vertical wall 1ü4 of the nose 87 of the embossing insert 82. Also in the shaping zone Z is the somewhat conical lower, downwardly and outwardly inclined surface 106 of the nose guide segment 93. An annular rib 108 can project downward from a central part of the surface 106. The outer hand of the surface merges into the wall 110 of the pocket 112 in the nose guide segment 93. All of the named parts of an embossing insert

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82 and a guide or plate segment 93> in particular including the cradle 108 of the segment 93> act during the stroke of the press 28 with the tops of an embossing insert 59 and embossing segment 37 during the final molding of the easy parts 21, 22 of the bteges 2k including its Sollbr -.chlinie 2k · and the hinge 25 and the dome-like section 27 of a tongue 20 including the annular recess 21 'in the base 21 together.

Figs. 11 to 13 show a modified design of the tools at the station (2) instead of that Figure "10 may be used in accordance with when the use or production of tabs or knobs 20 rschlußglied of different diameters in the finished V ₉ 10 additionally a stiffening pick 18 is intended. iJa.the embossing inserts and associated files of the tools according to FIGS. ₀ 11 to 13 j apart from the size, which are similar to those of FIG the files directly assigned to them are denoted by reference symbols with two dashes {"). If pressable tongues 20 of different sizes are to be produced, the embossing cavities 43 'and 45' and the associated embossing pins 50 of the tool equipment must of course be attached to the stand η (1 In the manufacture of tongues 20 of different dimensions, the arrangement of the bulge 18 usually requires special considerations regarding the tools compared to the tools shown in the drawing in that the bulge out of the center of field 14 shifted out, but from the innermost neighboring ones Edges of the two tongues of different sizes should nevertheless preferably be the same, far away. Ice would then of course not only be the changes in size and location of the

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Embossing cavities 43 'and 44' in the station's tooling equipment (i) to make, but also the Foriuhoblraurn 44 'at a more suitable to be arranged elsewhere.

The following is the method of forming an improved Closure member according to the invention based on the production of a closure with iiungenausbildung according to FIG in a two-stage process or apparatus with two stations using Iverkzeugequipment- der described type ^ A two-stage process is preferable, since in such a "process the! necessity of a violent Forming or flow of the metal is avoided, that would occur when molding in a single operation and would lead to cracks and high rejects. So it is provided in a preferred embodiment of the invention, that the closures 10 through the two stations of the press be passed by placing them between the opposing upper and lower embossing elements of each station (1) and (2) are guided, with sufficient residence time in each station for the execution of the desired forming work is permitted by the embossing elements in question. This could, for example (FIG. 5) thereby be achieved that a band made of metallic material with suitable openings and locking members inserted into them 10 and is passed along the path shown for example in FIG. 10 between the embossing tools.

When moving each closure member 10 between the upper and the lower embossing segment 40 or 35 on the StdAon (1) this workpiece initially detected during the downward stroke of the press by the nose end 49 of the centering ring 46 of the station (1), by that enters the rib 16 of the closure member 10 and the closure member with respect to the stationary embossing pins of the lower stamping segment 35 centered (Fig. 5) · In the

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Further downward movement of the embossing segment 40 engages the otiite 50 and the undersides of the walls of the various embossing cavities 43 '»44' and 45 'on the field section 14 of the sealing member and cause a pulling or driving of the various selected areas of the field part 14 with a slight bulge at the top in the embossing cavities 43 ^1, 44 'and 45' to form the shallow central bulge 18 and the lateral buttons or humps 120 (Fig. 6) or reduction of the thickness of the metal in the lateral walls of the humps and bulges with /.-.usnahr :>3 of the apex or uppermost parts of the humps and rare bulges, and even there iiit the diminution of the bulges;: ur minimal.

If, for example, the Ausgarigsi-i-imaterial or the sciilußlied 10 with a diameter of about -3 now (2-7 / 8 ") made of a ductile and easily processable aluminum alloy of suitable hardness or a suitable degree of hardness, for example the Al alloy 5 ^ 82 (according to, American Aluminum Association) and a degree of hardness of ea.3 / ^ 5, for example tf 2b, and an original thickness of approx. 0.33 mm (0.013 "). The thickening index length during the first forming step in the central bulge 18 and the lateral bosses 120 must be at most in the order of magnitude of about 50 µm (OD), and this thickening decrease takes place essentially entirely in the apices of the bosses and the bulge 18 instead.

During this original, shallow impression, the The hump and the bulge are symmetrical throughout shaped, and button-like as the final push-in side Parts 20 hump 120 of the same shape and size are used, these are preferably at the same intervals on both sides of the central bulge 18 and

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are the gentle outward embossing pressure or the

Se

Pulling action of the pins exposed. After the initial formation of the shallow humps or recesses 12o and the protrusion 18, the amount of consistently of the order of about 2 RNIN (5 / i- ^ ^'!) And their Grundflächendurchrnesser in the order of about 12.7 - ^f " tn ¹ ^ / -? ") -i-ie; s, the shutter 10 will be opened by the i ^J rägeelerri6.nten dr otation (i)

released by the Prasse 28 in the known white and then / the conveyor belt V the: Embossing tool set de. · Station (z) fed, while at the same time a further locking member 10 is fed to the tool set of the station (1) so that this can be pre-processed, while, at the same time, the former closure member, which is now located in station (2), is being finished.

when the partially formed closure member 10 enters station (2) it is first released from the spring loaded centering ring 46 of this station detected, which surrounds the upper stamping segment. When on the downward movement of the press platen 31 the nose part of the centering ring 46 of the station (2) itself in the rib 16 of the locking member 1ü, it centers the locking member and holds it in relation to the tool parts of the station (2). If then the .ierkzeugkantenteile of the upper embossing segment 56 to full contact move downwards with the field section 14 of the closure member 10, the preformed bulge 18 occurs freely in the central stamping cavity or the recess 125 of the upper stamping segment 93 and between the embossing inserts 82, where they during further processing and reshaping of the outermost Hand parts of the side depressions or humps 120 relative remains unaffected, in which the outer and concentric inner base parts 21 and 22 of the Tongues, etc. and the finished tongues of, for example, 19 mrn (3/4 ") diameter and 2.4 mm (3/32") high.

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509837 / QSOO

When the upper embossing segment 56 (FIGS. 7, 8 and 9) of the station (2) is moved downwards, the initially formed central bulge 18 entering the cavity 125, the areas of the field section 14 which form the original "G-shaped surfaces" become 130 of the bosses 120 (Fig. 6), exposed to the controlled and progressive Ver orinungsdruck the tools of the station (2) and formed into the first and second base sections 21 and 22, which are connected to one another by the web sections zk , which consist of the reduced thickness order interrupted predetermined breaking lines 24 'and the tongue hinges 25, into which the latter merge into the interrupted breaking lineii 24 ·. During this Nachformens be in your field 14 to form the base and otegabschnitte 21, 22 and 24 of the finished tongue / t20 under ötreckfonnung the metal, the upper parts of the outermost hump 120 by a small SSETI fag aufwärtsgebo _s s and take the generally hemispherical Formation of the upper embossing cavity 88, but in a preferred embodiment of the invention they are not locked to the ', / and of the cavity 88, namely the dome-shaped section 27 the tongue and the bulge 18 be relatively shallow and only protrude as far as slightly below the upper boundary plane of the edge 12, / can be avoided by difficulties in stacking, unintentional opening of the tongues, etc.

The most violent deformation and controlled cold working of the Metal in the field portion of the locking member 10 in the station (2) occurs primarily in the area or zone Z (Fig. y), while the upper parts of the humps 120 in their associated embossing cavities 88 are freely and easily bent or displaced upwards without being in the actual wall 26 of the originally formed recess and the finished formed dome-shaped section 27 a further significant reduction in thickness occurs. So far in

509837/0600 -24-

25C7033

a tongue wall 26 a reduction in thickness takes place, this occurs primarily during the first bulging in the station (1), and then only in the outermost upper part or apex of the dome-shaped section 2? and the bulge 16, as described above;, during the processing in the station (2) in which the web area 2k is reduced in thickness, there is essentially no junction reduction of the metal in those areas of the field 14 which are in most of the base 21 and cold worked into the entire base 22. With the exception of the Stegbereich.es 24, a relatively small part of the base 21 formed by the tilting 108 and the apex of a dome-like section 27, a finished molded tongue 20 has almost the same thickness as the initial blank of the closure member 10 before processing and finishing in the stations (1) and (2).

At the Kaltforuiuiig in station (2), the metal of the field 14, which forms the predetermined breaking line section 24 'of the web 24, is subjected to a tool pressure from both sides, so that it is considerably thinner than the remaining parts 21, 22 and 26 of the finished tongue 2Ü »For example, the web section 24 with the exception of the hinge 25 is violently cold-worked from both sides and significantly reduced in thickness, so that in the case of a closure member 10 with an original thickness of the hollow ring of about 0.33 mm (o, O13 "), the remaining Sollbruciilinie ^f 24 of the web 24 to a thickness of 0.076 to 0.038 mm (O, 003 and 0.0015") or the blank may be weakened without hot during molding even to one-eighth of the original thickness.

During the same time in which the metal of the predetermined breaking line 24 'in the area Z (Figo 9) the compression deformation by the tools is exposed, it is due to the compression deformation effect of the tools compared to those with the web

509837/0600

section 24 and the bolibrachi line 24 'formed in one piece and substantially solidified and embrittled to these adjacent base sections 21 and 22. During cold working and thickness reduction, the breaking line 24 * is also aligned as indicated in FIG. 3A, preferably at an angle of 45 outward from the normal plane of the field part 14. Since aer boll bru is about 2m x ¹ des Web is advantageously formed by opposing impressions or mutual grooves in the metal, this has the advantage that the metal is in an in the white. sentliehen is brought to flow in a controlled manner from your web part 24 on both sides of the metal closure and along the entire length of the residual part or the predetermined breaking line 24 'of section 24, i / ies tr'Agb also? I; this helps to avoid the risk of the metal jamming in the embossing tools and the formation of local pinhole-like opening areas in the predetermined breaking line 24 ', which later break before the intended opening and lead to undesired leakage of the closure member before use. c which could interfere with the desired easy opening of the tongue 20 in another way.

About the cold flow of the metal and especially the danger the excessive metal accumulation of the web 24 in the area Z to avoid and such metal from the section 24 'against to direct the interior of the cavities 66 and 68, the lower inclined .and 106 of a nose guide segment 93 in the vicinity of the shoulder part 98 is provided with an annular lip 108 be, which in the base 21 presses a small shallow annular recess 21 'and acts as a dam that a excessive cold flow of the metal outwardly from the lower and upper tool shoulder portions 68 and 98 and the metal break line 24 'of a tongue 24 delayed or prevented during its formation. At the same time, the metal forms in the Zone R in the base 21 is a band of metal that is more solidified than in the other parts of the base 21. The depth

FG383 7/0600 ~ ²⁶ ~

of the impression 21 ′ can be influenced by the vertically measured length of the tip 108 / or by the extent of the total downward movement of the nose member 93 with respect to the embossing tool surface 73. Similarly, x ^ ith the final thickness of the breakable portion 24 'on the extent of downward movement of the nose 87 of the Prageeinsatzes, for example & 2, with respect to the cooperating embossing insert 59 is determined, and all these SIZES. can be slightly larger or smaller than shown in FIG. 9 .

As already noted above, the embrittlement of the predetermined breaking point means 24 * because of the old shaping discussed and in particular Inquiry in station (2) that this area of the tongue 20 can be easily broken open by only one relatively little inward force on the dome stem

Section of the finished tongue 2ü is brought into effect. Additionally to the easy opening due to the application of a mutual weakening or thinning reduction of the metal When a tongue 20 is opened, occurs in the predetermined breaking section 24 ' yet another benefit. There is namely no risk of breaking the predetermined breaking line 24 'on the outside of the closure member 10 in the region of the tongue opening leaving sharp ridges of material on which the user could injure his or her fingers.

Although according to the preferred embodiment of the invention circular predetermined breaking line over its entire length an essentially constant thickness of, for example, 0.076 mm (0.003 ") according to the example above, the length of the breaking line 24 'could decrease slightly along its length, and this could be done using appropriate tools, as in Pig. 3A in broken lines indicated. The predetermined breaking line could therefore be at a point directly opposite the hinge 25 », for example at point P.

509B37 / 06Cy

(, Fig. 1) will be slightly thinner, e.g. 0.05 now (0.002 "), than at any other point along its length and ^{thickest at points P 1} on either side of hinge 25.

After placing the embossing set in the station (2) and the final forming of the closure member 1Ü, the stamping tool 28 is opened and the stamping segments 37 and 56 are separated. To lierausbewegen the closure member 10 rait the completed Tongue 20 and the bulge 1b from the station (2) is the Verschi u, .. member by means of the conveyor belt W in a further processing station transported on the production line.

In a further advantageous embodiment of the invention, to protect the various depressible tongues 20 against unintentional opening, in particular when Anböixieln the closure members provided with such tongues to the open ends of Be-Lu ₁ I tern, such as beverage containers, by means of the usual flanging tools and others mechanical effects on the closure members, such as transport, loading, stacking, etc., provided in the field part 14 upwardly projecting embossed training. To provide such protection, the closure member to be described is advantageously provided with protective and stiffening formations of greater height than that of the depressible tongues, but of less height than that of the edge of the closure member. In one embodiment of the invention, such embossments are arranged in the vicinity of the central field section of the closure member. When stripping the closed and unflared container from a normal can end crimping tool, its stripping members should attack these formations and not the push-button tongues, which could lead to an unwanted opening of these tongues.Tile- like embossed formations can, if desired, with further hollow embossings to stiffen the lid or

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-28-

Link in itself combined in an improved manner or intended to be part of such.

A closure member 210 having such improved upstanding embossments is illustrated in FIGS. 14-10. The closure member 210 can be produced by means of the tool device of station (i) according to FIGS. 17 to 23 and the following description as well as by means of the tool device of the general station (2), in particular according to FIGS. 9 and 11 to 13. 17 to 23 at the station (1) and to be used in the overall press according to FIG. 10, closure members 1ü are fed to the press 28, which is equipped with the tooling according to FIGS. 11 to 1Ί and 17 to 23, as described above, for example by means of a conveyor belt W with openings _s into which the closure members 210 can be inserted.

As shown in the drawings, in particular in Fig. 14 to 1ό, there is a closure member 21ü from the usual reinforcing edge 212 on the circumference, which is in a conventional manner on the upper Hand of a container, for example a beverage container, can be flanged, and from a central field part or area 214. This area 214 is at least one common Kand reinforcement rib 216 and a central bulge 218 of suitable shape, for example a shallow truncated cone shape, fitted. In the embodiment of the invention 14 to 16, the bulge 218 is because of the different Dimensional proportions and local arrangement of the push-button tongues 220 and 220 'somewhat off the central axis of the closure member 210 moved out.

The larger push-button tongue 220 can be used to pour out the contents serve from the container, while the previously openable tongue 220 'can be used to .the ßehistorinnenraum

(-29-) -30-

B09837 / 0600

to relieve the pressure when the container is used for the distribution of beer or carbonated drinks, etc., üie position and function of the bulge 218 are similar to those described above for the bulge 18 of the closure member of FIG., and each of the depressible tongues 22C and 220 'is also provided with improved Bcsisabschnitten 221 and 222, the fruiter described 13asisaDschnitten 21 and 22 of VerschluiJgliedes 10 corresp;. Iien and with respect to construction and function gleichen- lie basisteiie 221 and 222 are as described above for the entsprseilend _n Basisteiie 21 .. and 22 of the Verschluiigliedes 1R described offset from each other, and they are concentric engeor '''net and arranged at an .Winkel by a ^ ¹ steep 22k connected the itegteil 224 is similar to the further el ·: π b65: - :: rubbed also arranged at an angle Stefrail of the closure member ih 10 in construction and function. also, the web 224 has a lso a Kest or Solibruch line 224 ', which can extend over a substantial part of the web 224, as well as a hinge 225 »and ς, j L this is the same as the construction and function described for the tongues 2ü according to FIGS. 1 to 4A However, the hinge 225 of the larger push-in tongue 220, as shown, is arranged close to the central bulge 21b _{ while the hinge 225 of the smaller push-in tongue 220 * _s as shown, is arranged closer to the hand rib 216 than to the central bulge 218 ₀ i> he hinges can also be arranged essentially in alignment in the interests of ease of manufacture. In addition, a given hinge 225 may be of greater length than shown in FIG. For example, the smaller tongue 220 '(Fig. 24) may have a relatively large hinge 225' that extends over a substantial arc, for example 120 to 140, while the frangible portion or solubility line 224 'of the web has a substantial and even larger one part of

-31-

2507U33

Web 224, for example a Bo ^ eti from 220 to 24ü, so that a little more than about half of the tongue 220 along the kink line £ 26 'of the tongue 22O ¹ around the hinge 225' (Pi-S- 24) to release the can be pressed in the interior of the container with the closure member according to the invention built-up pressure.

Otherwise and with the exception of the different proportions and special. Tongues 220 and 220 'and ciie bulge 218 can have the same basic shape, construction and function as the push-button tongues 20 and bulge 18 according to the preceding description of the closure member according to FIGS. 1 to 4. E ± t, fundamental difference between the locking links. To and 210, however, consists of the upwardly projecting protective embossments 227, which can be formed separately or as part of the upwardly directed beads or rib-like embossments 228, eg in the embodiment of the closure according to Pig, 14 to 16 converging on both sides of the tongues 220 and 220 'can be arranged. The height of the embossments 227, which can be of various shapes, for example hemispherical or, as shown in FIGS. 14 to 16, can be dome-like, should be greater than the height of both tongues 220, 220 * and the bulge 218. These beads 228 are not used only as a basis for the protective embossing 227> but also for further stiffening the field area 214 of the closure, which reduces its susceptibility to incorrect or harmful bending during the pressing down and opening of the tongues 220 and 220 '. These stiffening and protective beads or embossings 227, 228 can, instead of converging (FIGS. 14 and 15), also be arranged in parallel (broken lines in FIG. 1).

The tooling for the production of the closure member according to FIGS . 14 to 16 has, in addition to the tooling equipment of station (2) according to FIGS. 11 to 13, the modified tooling equipment according to FIGS

-32-

ζθ? Ρ37 / 0600

Press 28 on. In a preferred embodiment of the invention, the tooling of FIGS. 17 to 23 can have a lower and an upper stamping segment 235 and 236, respectively; ", while the upper stamping segment 236 is fastened to the movable stamping section 31 by means of suitable machine screws (not shown) in the same way as the upper level segments 36 are detachably connected to the upper stamping section 3I provided, which is removably mounted in the growth 33, which is inserted in the opening 32 of the movable ι-rdgeababschnittes 31 «iJer centering shaft or pin 237 can be the lower part of the central punch or central stamping pin 2Jb for embossing or preforming the bulge 218 and be formed in one piece with this.

About Stenpel 23b and other stamps 239 and 24ü of different Dimensions are inserted in bores 241, 242 and 243 of the punch holder, which is the lower fixed stamping hole 235 forms. With the stamps are ochulterelemente or Collars 244, 245 and 246 on the relevant stamps 239, and 24g formed, and these collars fit into the joint All-subsidence 241 '. If desired or required, can be done before screwing the Prngesegtnentes 235 to the bed of the press between the bed 30 by means of normal machine screws 55 the press and the punch holder or stamping segment 235 BeiJagen or spacers 247 can be used. When the centering pin 237 is formed in one piece with a punch 238, the spacer 247 should be provided with a hole for this (Fig. 17) «The stamps or pens are within of the punch holder 235 through the shoulder 25Ü of the countersink 241 ■ held, and between the shoulder 250 and the collars 244, <i45, 246 of the individual pins can, if desired,

509837/0600

Enclosures 251 can be arranged, except with punches 238, 239 and ZkQ , the lower priigesegraent 235 (Fig. 17, 15, 20 and 21) is provided with two raised and extended ribs or rod-shaped surfaces 270, which are arranged somewhat converging and at one Embodiment of the invention extend a substantial distance over the surface of the segment and serve to produce or form the raised beads 128 on the closure member 21C , 239 and 24o. At points at suitable intervals along each of these bar elements or similar raised elements are one or more heads or buttons 272 of suitable, for example hemispherical or truncated cone-like shape, the height of these buttons 272, which are intended to form the protective embossments 227 in the finished closure member, should be slightly higher, for example 0.25 to C.5 mm (0.01 to 0.02 ") higher, than the vertices of the individual punches 238, 239 and 240.

The hemispherical or arcuate segments 272 can be at an embodiment of the invention all at the same distance be arranged from the center of the embossing segment 235 or in a circle around this, so that they protective embossings 227, which lie in the wreath on the same circle around the center point or the central axis of the closure member 210 and when the closure member 110 is flanged onto a beverage can normal dimensions come into contact with the ejector of the crimping tool.

2 ftf

Although the buttons may be integrally formed with the raised rib 272, they could also be in the form of a removable pin may be provided 272 '(Fig. 2O) ₀ This pin fitted replaceably in an external stepped sleeve holder 273, in turn, removably in a stepped bore portion

-34-

509837 / 060Q

274 can be used in the corresponding parts of the embossing segment 235 is arranged. tfie at pins 239, 238 and 240 can be removed in the attachment of the lower die segment 235 in a removable manner to the plate 30 of the press the sleeve 273, the pin 272 'and the fixed platen 30 suitable spacers or accessory elements 275 are used.

The upper embossing segment 236 works together with the lower embossing segment 235 i ⁿ - of the station (l). The Pragesegment 236 has an upper between the Pragesegment 236 and the movable upper die portion 31 inserted upper spacer member 252 with a hole, the Prägosegraent 236 receives the centering ring already described above k 6 _s of genalten of a Jtialteschulter 38 in its location and relative is spring-loaded onto the Prkgesegment 36 by means of the normal spring elements 47, which are inserted into separate cavities 48 in the upper shoulder part of the ring 46 in the manner already described above. This tensioning or centering ring 46 with its barrel part 49 is normally held in the extended position with respect to the lower parts of the embossing segment 236. The nose h-9 of the ring 46 fits into the rib 216 of the locking member 210 and initially centers it in relation to the upper and lower embossed segments 235 or 236 in contact with the individual hollow embossing punches or pins 238, 239 and 240 of the lower embossing segment 235 and in a centered position with respect to the lower and upper embossing segment 236 and 235 at station (1) during the molding process at this station.

The upper embossing segment 2 "} 6 also has (FIG. 17) the main embossing cavities 26O, 261 and 262, with which the punches 239> 23Ö or 24o cooperate in the initial formation of the tongues 220, 220 'and the bulge 218. The embossing cavity 260

509837/0800

-35-

may be formed as a continuation or expansion of a main bore 263, while the cavity 262 may consist of a continuation or expansion of a bore 264. In an advantageous embodiment of the invention, the upper part may be configured of the bores 263 and 264 for receiving the Zentrieroder position determination pins 265 for the coin segment _s projecting through suitable openings in the inserts 252 and the centering pins 265 can, if desired, the lower portions of the Be pins 266 which are inserted through corresponding openings in the upper movable embossing sections 31 and fastened therein in a known manner.

The embossing segment 236 is furthermore, as indicated in FIG. 19, with elongated, converging rib-like cavities 280 of the type indicated in FIGS. 19 and 23, which cooperate with the ribs and buttons 270, 272. Appropriate Parts of these cavities 280 can be further hollowed out or provided with countersinks (FIGS. 19 and 22), so that enlarged openings 282 for receiving the pins 272 'along with that part of the field portion 214 of the closure member 210 are created, from which the raised protective embossments 227 are formed in a manner still to be described should be. The stepped countersinks are formed along with the cavities 280 in the upper die segment 276, as in FIG known in the art.

The parts of the tooling illustrated in FIGS. 9 and 11-13 the station (2) can be used to form the finished closure member 210 advantageously together with the parts the tool equipment of the station (1) according to FIGS. 17 to 23 be used. Because of the design and arrangement of the parts of the tooling of this station (2) according to FIGS. 9 and 11 13 to 13 is in the various parts of the upper embossing segment 56 'and the associated embossing inserts 82' and 82 "as well

-36-509837 / 060Ö

the guide and protective plate 92 has sufficient play for the inclusion of the raised portions 227 and 228 at the one in the station (1) molded fastener member 210 is provided. In addition, since these raised portions 228 and 227 are entirely on the Station (i) are produced, there is no need for any further treatment of these parts of the connecting member in the second station.

The only further processing of the closure member 210 which is carried out by means of the tool equipment of FIGS. 11 to 13 and 9 in the second station is the final molding of the base sections and the parts of the predetermined breaking line, etc. for the individual push-button tongues 220 and 220 ^f , the can basically be the same as in the already described closure member according to FIGS. 1 to 4a.

The method for finish embossing the closure member 210 at stations (1) and (2), apart from the formation of the Protective coinage, basically the same two-step process as described above. When embossing or drawing, the in of station (i) takes place during the downward stroke of the press, the individual punches move or pull the metal of the flat Area or central portion 214 of the closure member upward into embossing cavities 260, 261 and 262 of different Size. All of this takes place with controlled cold flow of the metal without any significant or noticeable reduction in thickness Metal in the various parts of the bosses and the various walls, apart from a possible reduction in thickness at the apices or uppermost parts of the humps or bulges to an extent but 25 or 50 µm (0.001 or 0.002 ") does not exceed <,

After the initial formation in station (i), the Height of the various shallow humps formed with the tooling of Fig. 17 and later the tongues

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509837/0600

220 and 220 'should form, on the order of about 1.75 mm (O, O7O ") plus-minus usual tolerances, while the The height of the protective embossments 227 would be approximately 2 mm (0.080 ") plus-minus usual tolerances. After the basic shape has been produced the hump of the frustoconical shape or of different Sizes in a given closure member 210 in station (1), that closure member 210 is in the already transported in the manner described above into the second station of the press 28, in which the embossing set of the second station (Fig. 9 ' and 11 to I3) in the manner already described above first and second base sections 221 and 222 for each tongue 220 and 220 'together with the annular web sections 224 and the tongue hinges 225 in the smallest and largest Forms (smaller and larger) bumps without significantly influencing the bulge 218 arranged in the middle. While of the forming process in station (2) takes place, apart from the predetermined breaking line 224 'and the formation of the rib 108, when used in a base 221, there is essentially no or no intended thinning of the material of the closure member 210 during the cold working of the base parts of the tongues 220, 220 'at this station.

Of course, if the remaining break line 224 'is any Tongue, for example the tongue 220 ', is still intended to form a larger part of the web 224 of the tongue, as is the case with the 24 applies, the tool equipment is on of station (2) appropriately modified by making the cavity 97 of this tooling longer and extends the desired distance to receive and form the larger hinge 225.

The material from which the closure member 210 is made is during the forming work at station (2) in a controlled manner cold worked and brought to cold flow, essentially as above for the formation of the closure member according to FIGS. 1-4a

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for example described.

In an advantageous embodiment of the invention are at least the uppermost parts of the base parts 221 and 222 of the

Tongues 220 and 22O ¹ is formed so as to be both horizontally and vertically displaced from the tooling at the station (2), which least to form the desired areas resistance to breakage in the finished strips 220 and 220 'in above described manner contributes.

The above description deals only with a few advantageous embodiments of the invention, but there are many Modifications are possible within the scope of the concept of the invention.

Claims

509837/0600

Claims (1)

Claims Easy-to-open metal locking link, characterized by a field section surrounded by a hand and at least one stiffening circumferential rib, a bulge stiffening the field, of at least one a part in the field in the area of the middle part is formed of the same, and at least one outwardly protruding, button-like »push-in tongue, which in the field between a selected part of the edge rib and the stiffening bulge is formed and with a primary (first) and a secondary (second) base section connected to it in an expediently eccentric, with respect to each other concentric arrangement, an outwardly projecting dome-like portion and is equipped with a web, of which the first base portion is inclined generally upwards and inwards, the second base portion is inclined generally downward and inward and into the ¥ and of the dome-like portion passes, both base sections have tire-like strength properties, and the web at least one Part is arranged at an angle to the normal plane of the field connecting the base sections together and consists of an embrittled and easily fragile predetermined breaking line and a hinge, of which the Break line extends over a selected length of the web, and which are arranged such that the normal Inclination of a selected part of the wall of the dome-like section in the area of the transition point of the Wall to the second base section in projection! along imaginary lines form opposing and intersecting geometric cone-like surfaces and the predetermined breaking line section a much smaller thickness than that -4o-509837/0600 adjacent base sections so that when an external, inward force is exerted on the dome-like Section of the predetermined breaking line part is exposed to concentrated stresses, under which it is effortless breaks and inward pivoting of the dome-like portion of the tongue to the desired extent about the hinge portion enables. 2. Closure member according to claim 1, characterized in that the predetermined breaking line part of the web, the normal inclination of the selected wall part of the dome-like section in the area of the transition point of the wall to the second base portion and the walls of the first and second base portion together in projection along imaginary Lines form opposing pairs of geometric cone-like surfaces and the points of intersection of certain of these imaginary projection lines see below the Level of the predetermined breaking line part of the web. 3. Closure member according to claim 1 or 2, characterized in that the predetermined breaking line part of the web is itself extends over the greater part of the length of the web. 4. Closure link with device for easy opening, made of metal, characterized by a main field surrounded by an edge and at least one reinforcing hand rib, one formed in a selected area of the field, closer to the central part of the same than the rib, the field stiffening bulge, two outwardly projecting, button-like, push-in tongues formed in the field, which are each arranged on a separate side to the side of the bulge between this and the edge rib and from which at least the one with a primary (first) and -41- 509837/0600 a secondary (second) base portion, an outwardly projecting dome-like portion and a ridge is equipped, of which the two base sections are expediently eccentric, concentric with respect to one another are arranged and connected to one another and the first base section in general? inclined upwards and inwards and the second base portion is directed generally downwardly and inwardly and into the wall of the dome-like Section passes, both base sections have ring-like strength properties, and of which the web is inclined at least in part at an angle to the normal plane of the field and the base sections connects with each other and from an embrittled, effortlessly fragile, pinched on both sides (grooved) predetermined breaking line part consists of a selected part of the length of the web and a hinge section, where the fragile breaking line-il des Ridge and the normal slope of a selected part of the wall of the dome-like section near the Transition of the wall to the second base section in projection along imaginary lines opposite one another and form separating geometric figures and the fragile predetermined breaking line part of considerably less Thickness than the adjacent base parts is so that when an external inward force is applied the dome-like section of the predetermined breaking line part is exposed to concentrated stresses under which it effortlessly breaks and an inward pivoting of the dome-like section of the tongue to a selected extent around the hinge part enables, and an upwardly directed tongue protection embossing, which is arranged in the vicinity of a depressible tongue and is of greater height than said bulge and any of the depressible tongues. 5 · Closure element according to claim k, characterized in + cone-like -42- 509837/0600 that the tongues are of differing dimensions and the field also has two rod-like, converging beads, which are embossed with the tongue protection embossings facing upwards are formed in one piece and are arranged on opposite sides of the depressible tongues. 6. Process for the production of an easy-to-open closure member with at least one push-in tongue according to one of claims 1 bi .; 5 » characterized in that eir? Blank made of ductile metal with a main field and an outer reinforcing circumferential rib is pre-machined by simultaneously targeting a part of the field that is closer to the center of the field than the rib and at least one further part of the field between the first-mentioned part of the field ιιτιύ a selected part of the rib Drawing presses are exposed and in the first-mentioned part of the field a bulge and in the second part of the field an outwardly arranged hump (a depression) are formed without the thickness of the metal of the wall of the hump j apart from its uppermost part, is reduced significantly, then without substantial action on at least the larger part of the bulge under control of the flow of the metal of the boss, the metal in the upper part of which is directed slightly outwards into a limited curved opening and the metal in the base parts at the edge of the boss to Formation of an inner and one with this d The outer hump base section connected by a web is reworked and reshaped in a selectively eccentric and concentric arrangement and then subjected to compression deformation forces without reducing the thickness of the material in any part of the hump which is located in the curved opening and at least most of the base sections of the web Exception one -43-509837 / 0600 selected amount of material in the web significantly reduced in thickness is, whereby an embrittled thin line of weakness is generated in the web, and during the reduction in thickness of the web and formation of the predetermined breaking line section the formation of a hinge part is allowed, in which the material from the ends of the predetermined breaking line section entry. 7. The method according to claim 6, characterized in that the Preforming of the carcass bulge and the hump in one station and post-processing and post-forming of the peripheral side Base parts of the hump can be carried out in another station. 8. The method according to claim 6 or 7 »characterized in that that the metal in the upper part of the boss is caused to enter the curved opening without jamming therein to flow. 9. Method according to one of Claims 6 to 8, characterized in that that the predetermined breaking line section by pinching and killing from both sides in the larger Part of the web is formed while the controlled excess metal, which is generated during the formation of the grooves, from the breaking line slope that is in the process of being formed is directed into the limited curved opening. 10. A method of manufacturing an easy-to-open closure member with push-in button-like tongues according to one of claims 1 to 5 » characterized in that a closure blank made of ductile Metal with a relatively flat main field, which is surrounded by a stiffening rib on the circumference, initially preprocessing is done by placing the metal in one area of the field inward of the rib and in two other locations -45- 509837/0600 on both sides of this area of the field to form a bulge in the field area as well as two of those neighboring ones shallow hump while retaining or almost retaining the original thickness of the field at least in all parts of the walls of the hump except the topmost Parts of the same outwardly directed embossing pressures are then subjected to no significant influence at least the greater part of the bulge under control of the cold flow of the metal of the bosses the metal in the upper parts of which it is directed slightly outwards into separate cavities, the metal of the field in the peripheral one Base part of each hump to form an inner one and one concentric to and through with it a separate ridge portion connected outer base for each boss without reducing the thickness of the metal those located in the relevant hump embossing cavities The hump and the metal is reworked and re-formed in at least the largest part of the base parts and thereby except for small amounts all of the metal in the areas of the web part of the hump to create an embrittled, interrupted circular predetermined breaking line in each hump is significantly reduced in thickness and thereby excess metal from the thinned areas of the web part accrues against the relevant assigned stamping cavity is directed. 11c Method of making an easy-open closure member with at least one tongue that can be pressed in, characterized in that a closure blank made of ductile Metal with a main field and a reinforcing circumferential rib is preprocessed by predetermined Areas of the panel to form bulges in the panel and a shallow outwardly located hump (a specialization) in the ifel d parts without any noteworthy + curved e -45-S09837 / 0600 Thickness reduction of the metal at least in the lower part of the wall of the hump targeted outwards Drawing pressures are subjected, with at least one of the bulges being formed higher than the hump, then without any significant influence on at least the predominant ones Parts of the bulges while maintaining the height relationships and with controlled flow of the Metal of the hump the metal in the upper part of the same slightly outwards into a limited curved opening is steered, the metal in the peripheral base part of the hump to form an inner and an outer hump base part connected to this by a web iii chosen eccentric, mutually concentric arrangement is post-processed and post-formed without reducing the thickness of the material in any part of the in the curved opening located baking ice and in the largest Part of the base portions of the web to create an embrittled thin predetermined breaking line in the web compressive deformation forces is exposed and the material of the web is reduced significantly down to a selected part in thickness is and thereby to form a hinge part for the push-in tongue a receding of the material from the Ends of the predetermined breaking line section is allowed in the hinge part. 12. The method according to claim 11, characterized in that the preforming of the bulges and the hump in one Station and the reworking and reshaping of the circumferential base parts of the hump in a second station be performed. 13 · Device for carrying out the method according to one of claims 6 to 12 for producing a container closure member made of metal with at least one with this integrally formed, push-in tongue after a + at the same time -46- 509837/0600 of claims 1 to 51 characterized by a first station with cooperating, opposing embossing segments, of which at least one is relatively movable with respect to the other and of which one with several punches arranged at selected intervals ιηχΐ rounded heads and the other with a number of v.:>n the Stamping the one stamping segment opposite arranged stamping cavities is equipped with an elastically loaded centering ring, which is assigned to one of the stamping segments at the first station and grasps the edge of a switch locking member, this centered and holds its position during the period, be the first station to the closed position brought vjevdGn and formed in your closure member by the action of · the ΐ ^4-ampel. embossments in the form of bosses, a second station, means for transporting: in which the Präges ^ gmei-ri - / or embossed container closure members from the first and second station, which let ztere also has mutually working, opposing embossing segments, of which at least one is movable with respect to the other, one has at least one cavity, the τοη a stepped shoulder part for gripping and processing the lower surface of the closure member at the base of a hump-like Embossing is surrounded by moving towards each other and closing the embossing segments of the second station, and of which the other (embossing segment of the second station) also has at least one cavity of smaller circumferential dimension than that of the first cavity of the first-mentioned embossing segment of the two-tone station, the smaller cavity of the other Embossing segment of the second station is also surrounded by a stepped shoulder portion which is aligned and cooperating with the former stepped shoulder portion of the former embossing segment at the second station and the upper surface of the fastener link "■ - ^rj t < J U ' at the base of the hump-like embossing when moving towards each other the embossing segments of the second station faidt into the closed position so that the first and second said stepped shoulder portions form the base reshape the hump-like embossing and finish the shaping of a tongue at the second station. 14. Device according to. Claim ι 3 »characterized by a fcderladen Zentrierriag, the one of the embossing segments assigned to the second station and in cooperation with this the closure member grasps and centered with respect to the embossing segments at the second station. 15 »Device according to claim 13 or 14, characterized in that that at least one of the coins blessed the second Equip the station with a removable embossing insert is the one part of the device on the second Station is equipped with one of the cavities, l6 * Device for carrying out the method according to one of claims 6 to 12 for the production of container closure member made of metal with a press-in tongue formed in one piece with this according to one of claims 1 to 5 »characterized by a first station with cooperating and opposing embossing segments, of which at least one is relatively movable with respect to the other and one of which is equipped with several punches arranged at selected intervals with rounded heads and other hollow embossing elements of greater height than that of the punches and of which the other (embossing segment) is equipped with several embossing cavities , which are arranged opposite the punches and other hollow embossing elements of one embossing segment, a spring-loaded centering ring assigned to one of the embossing segments of the first station for gripping the edge + exnes -48- part of a container closure member and for centering and holding the same in position while the embossing segments move towards one another in the first station the closed one. Position and the formation of hump-like embossing and protective embossing in the VsrdcliluS » member under the action of the stamp and other hollow embossing elements onto the closure member, a second station, means for transporting the pre-embossed Container closure member from the first to the second station, which the latter also cooperates with and embossing segments arranged opposite one another, of which at least one is in with respect to the other is relatively movable and one of which has at least one cavity, which of one stepped shoulder portion for gripping and working the lower surface of the closure member at the base of a hump-like embossing when the embossing segments of the second station move towards each other into the closed position is surrounded and of which the other (embossing segment of the second station) also has at least one cavity of smaller circumferential dimension than that of the former cavity of the first embossing segment of the second station, the smaller cavity of the other embossing segment the second station is also surrounded by a stepped shoulder part, which is stepped with the first-mentioned Shoulder part of the first-mentioned embossing segment at the second station is aligned and cooperates and at moving the embossing segments of the second station towards one another to the closed position on the upper surface of the closure member engages the base of the hump-like embossing, so that the first and the second of said stepped shoulder sections form the base of the hump-like embossing and the formation of a tongue on the second station can complete. -49-509837 / 0600 17 · Device according to claim 16, characterized in that at least one of the embossing segments on the second Station is equipped with a removable embossing insert, which is the part of the device on the second Station is equipped with one of the cavities, 509837/0600 Le Vf e rs e ite