DE1432160A1 - One-piece sealing cap made of elastic, flexible plastic - Google Patents

Description

1-5. August 1968 / k

File number P 1 432 160.9 (F 42 494 III / 64a) 1432 IDU Applicant: F.G ..> I. & Go., Copenhagen My reference A 9345

One-piece closure cap made of resilient plastic

The invention be a one-piece closure cap made of resilient plastic for bottles and the like. Vessels that have a convex mouth bead and in which high internal pressures can arise, the cap has a rounded jüantelteil at the top, the diameter and height of which are smaller r.ls the bulge of dissolution of the vessel, and the part of the jacket which tightly encloses the bulge over its entire height when the cap is placed on the vessel is stretched both in the circumferential direction and in the axial direction, and with the cap as the lower edge of the cap adjoining v. bulge part, which is both with an inwardly directed retaining bead and with a nac "<externally sealed L..tütr \ vulst, and whose length is at least; slightly the h ;. Yoen difference between the largest outer opening "3ssor tii'id de? · The smallest inner diameter of the yulest part.

oll είϋΰ such pl ^ sc'-siikapsule for closing bottles

j.ev; · ^ οι, in which an overpressure -or-rsclit, ¹ ^. ::. Beer or mineral water fishing, it is for

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Securing the required tightness necessary that the The jacket should be sized in relation to the dimensions of the bottle is that the mantle is placed in the aiif en capsule both in is stretched more axially than in the circumferential direction. Besides, it is To ensure that the capsule is held firmly on the bottle, it is necessary that the ¥ / ulstteil has a bend in its entirety, which is less than the height of the bead part »

In the previously "known such capsules, the bead portion is relatively Massir by outer bead and inner bead at almost the same height extending from the casing ₉ and also by the support bead is externally cylindrical, and the inner bead -aufweist a relatively laiire zj ^ lindrisclie _inside? By a rounding goes over into the underside of the uulstteil <>

Such a bottle cap with such a bead is most at fault-free bottles without Vorspränge or damage or »on Flaschenhalswulst _s capable of both the necessary tightness than for you to secure required adherence" * It is noted, however ,, that if the capsule all ^ Enein verv / ei ^ sollj be dbar dolio if they solleiij be at bott "s with smaller errors _s ZoEo pronounced Gießfinnen am- Flaschenhalswulsf _s brr.uchbpr _it's necessary that the jacket with. ini'.eren a covering made of a skin-like soft Material is provided »·

such a bottle cap can be placed on a bottle should, the vulst part must be very extended when putting on,

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because the inside of the retaining bead is to be led down over the outside of the bottle neck bead, the one in the Has a very large diameter ratio to the inside of the retaining bead. If the movement is under strain when touching down the top of the support bead at a relatively low speed, such as about 5,000 closures per hour, is made, there is no difficulty in putting the capsules in question, and the number of failures becomes large be small. If, on the other hand, a higher speed comes into question, e.g. with a capacity of 10,000 - 15,000 closures in the Hour, the number of failures increases significantly since the Retaining bead is often deformed instead of under the bottle neck bead to be led down »

The object of the invention is to provide a plastic capsule of the aforementioned Specify the type of which the stem is designed in such a way that it allows a secure attachment of the capsules - even at high speed - and thereby ensures that the capsules be able to get stuck with the necessary strength.

It would probably be the closest thing to design the retaining bead on 7, which is known per se, with a conical underside which could act as a guide when the capsule is put on. It has been shown to F.ber that such a design of the capsule causes such a weakening of the lower part that the Κφ is the inner one. Fl .- '. Schenor's back cannot resist _o

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In the closure flap according to the invention, the desired relief when putting on in connection with the achievement of the necessary holding force is achieved in that the axial height of the support bead, which can be measured from the transition of its upper side, into the outer side of the shell part of the cap to the lower edge of the bead part ₉ smaller, but not less! "Ger than half the height of that lower part of the inner surface of the cap, which extends from the inner edge of the upper side of the retaining bead to the lower edge of the bead part, and that the underside of the retaining bead is one downward widening truncated cone surface.

The invention is based on the knowledge that it is the main task of the support bead to prevent the retaining bead from rocking upwards as a result of the rather strong upward tensile forces that arise in the jacket after the capsule has been placed on a bottle, and that the lower parts of the support bead are only slightly stressed by these axial forces, which is why the lower part of the support bead can exert a radial inward pressure effect, so that the part of the bead part located between the lower part of the support bead and the retaining bead only needs to act as a lever to pivot the retaining bead inwards and upwards in order to achieve the required plague retaining effect. This enables the top of the support bead _s as mentioned above,

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to a lower one. Location than the top of the retaining bead can be brought so that the capsule is relatively thin - at least on the upper part of the Ilaltewulstes - and thus gives way more easily when touching down.

It should be noted that earlier to achieve a good, sufficient Stuck the capsule tried the reverse To take the path as the one one after the invention has trod, by some axially extending upward from the top of the support bead on the outside of the jacket Has formed ribs that should prevent the support bead from bending up and thereby preventing the Ilaltewulstes from pivoting out. Such ribs will counteract any deformation of the retaining bead when it is placed, but reduce the flexibility of the coat, which is why it is difficult, almost impossible, to access it 1 ¥ ice a capsule to achieve the required tightness can secure "

is most appropriate when the transition is the top of the Support bead and the jacket is lower rls the upper edge the downward facing surface of the El tewulstes, i.e. lower than the active part of the retaining bead. This creates immediately underneath the same a very flexible part that prevents such a deformation when the jacket and bead part are put on as a unit considered enables the placement to be particularly easy without reducing the pest-holding ability of the bead part.

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It has also been found to be expedient that the turning down The surface of the retaining bead is conical. This is so more surprising than such a conical design alone Underside of the Haltewuistes, as already mentioned, one such Weakening of the V / ulstteil causes its retention ability is significantly reduced, which is why it would be expected that the further weakening of the bead part - as a result of the reduced Height of the support bead still holds the ability to hold on would reduce more. It has been shown that the reverse is true the case is. But this is due to the aforementioned leverage

of the lower part of the support bead to be traced back to the retaining bead, by bending the former high support bead counteracted the lower parts of the support bead and as a result also that its lower part had the opportunity to use to act full force on the retaining bead. "

Further. Details concerning the bottle cap according to the invention will emerge from the following, where reference is made to the " ^:: " drawing in which .v-: ■. : i. ^;

Fi £ * .1 a section through one half of an an and known bottle cap of the relevant Kind shows where some embodiments are a bottle caps according to the invention are included,

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"7 Pig * 2 shows a section corresponding to Pig» 1 the embodiment of a FIa-J according to the invention that has been determined to be the most expedient today; pouring capsule,

···· <-. · .Pig · ; 3 and 4 »own corresponding sections through the conical capsule shown in Pig» 2 and the upper part of a corresponding conical neck, before and after the bottle cap is placed on the bottle

Pig · 5 shows a corresponding section through another Embodiment of a bottle cap according to the invention.

Pig · 1 shows with full lines a well known « Plane capsule, consisting of a top plate 10, one of down there coat 12 and one under it as a whole with 14 designated bead parts. The Manttl 12 has a wall thickness that is much less than that the top plate 10, and between the jacket 12 and the top plate there is a rounded transition part 16, which has a gradual Wall thickness transition between the jacket 12 and the top plate. 10 gives up. The latter has an outward view at its center a protruding reinforcement 18.

The bead part 14 consists of a support bead 2Ö, the outside the outside 22 of the jacket 12 is located, and a retaining bead 24 »which is located within the inside 26 of the jacket.

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Such a capsule can be made from a , Polyäthyi-Propylbutyl-Copolymer with an additional strength of about 250 kg / cm and a coefficient of elasticity of about - ■ 0.56'χ TO ^ kg / cm. Are the dimensional relationships otherwise like ■ shown in the drawing, and is the outer diameter of the Jacket 12 26.4 mm, the capsule shown in Fig. Ϊ́ is about Weighs 1.6 g and is placed on a test mandrel, i.e. on a bottle neck made of steel with exactly the standardized for Staiidard bottles of the type shown in FIGS. 3 and 4 Dimensions ".-. Withstand an internal overpressure of 17 - 18 atmospheres can. It should be noted that a capsule. Which is suitable for beer or Mineral water is to be used 'on which the test mandrel must withstand a pressure of at least 12 atmospheres without jumping off.

The aim is to make it easier to put such a capsule on a bottle be, it is closest, the retaining bead; 24 with a conical bottom - as with a dashed line 28

wo bsi ... ^; "■. _ Shown - to provide, / tier '""- conical lower part also extends under the support bead 20. This would at the same time result in a certain saving in material, since such a capsule would have a weight of about 1.5 g would. If such a capsule mounted on a sample of thorns, but she resists only a pressure of about 5 atü.und is therefore useless in practice.? ^r

But if the support bead 2.0 is made lower. e.g. so that his Top of the dashed line denoted by 30 follows that.

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by a rounding in the side wall 22 of the shell 12 a point 32 passes which is at the same level as the inner edge 36 of the upper side 38 of the holding part 24, shows that there is an improvement in capsule placement high touchdown speed is achieved, although the improvement is relatively small. The material savings with this one Training is also relatively small, but the bottle cap can withstand an overpressure that is almost as high like the overpressure of the already known bottle cap, namely about 17 atü · This training is not particularly interested.

A major improvement in landing at high speed is "reached, however, if the support bead 20 is placed even lower, e.g. s * o that its upper side corresponds to the dashed Line 40 follows, and the transition between its top and the outside 22 of the jacket 12 at one point which is lower than the inner edge 36 of the top 38 des Haltewulstes 24 "Such a capsule has a weight of about 1.5 G and can an internal overpressure on a Withstand trial mandrels of about 16 atm. . .

But if the retaining bead 14 is modified in such a way that one at the same time the support bead 20 can have such a height that its top corresponds to the dashed idnie 40, and there one of the underside of the retaining bead 24 is a conically cut off form - corresponding to the dashed line 28 = you get a

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Bottle cap that can be put on without effort at high speed without failure, and with the required 'Z holding force. This capsule can withstand an excess of soot tone, about 16 ätil, and a not inconsiderable material saving is achieved. in that the capsule indicated here has a weight of about 1.4 g "

The fact that in the fiction like aßen training despite dex? Weakening of the bead portion 14 as such is significant improved placement achieved without reducing the holding ability wirdj can probably be explained as follows

Will take a capsule from the one in Pig. T with full lines "shown" known -art placed on a bottle _s the Wtilettsil 14 as such with radial expansion slightly outward and upward around the lower part of the jacket, i.e. almost at the "transition 34" , at the same time the sheath is extended, and the lower part of the mantle is brought to bowing outwardly concave, 'the result is _s that the inner side 44 of the retaining bead 24 oblique to the direction of movement of Fl'asehenhalsea; at a relatively large T / inkel is This creates the risk that the retaining bead, instead of sliding along the iliac neck * bead, is deformed under the pressure _s that this, instead of under rad

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expansion jiach outside and above, continuously swings with its lower end inwards with radial expansion, because the hook influences the inside of the retaining bead ₉ .and the inward swiveling is due to the relatively small distance between point 42 and the top 38 of the JIaI tewulstes made possible. At the same time, instead of bending concavely outward at the bottom, the jacket 12 will bend inwardly at its lower end with radial expansion, so that the jacket 12 forms a gradual convex curvature of almost the same shape when placed on as it is when the capsule is placed on the bottle occurs. The fact that the bead portion 14 bends inwardly has the effect of reducing the resistance to the introduction of the bottle neck into the capsule. This effect is increased if the underside of the retaining bead 24 is made conical (for example according to the dashed line 28). In this case, the retaining bead 24 in particular will be brought more inwardly than the supporting bead when it is placed on it for curving, because it is relatively short. Ab-Standes between the point 42 and the line 28 in relation to the retaining bead 24 can pivot slightly outward. This has the effect that the force which is required in order to generate the mentioned pivoting movement of the Yiulstteiles 14 and thus the deforming forces which act on the retaining bead 24, is reduced even more.

When the bottle cap is attached to the bottle, the

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Retaining bead 24 in the groove _t which is located under the bottle neck bead of the bottle neck penetrate »and the over- ·

"Aisle 34 almost reaches the transition between, the · Flasclienhalswulat and the one under the bottle neck At the same time, the support bead 14 seeks to contract to its original size, whereby "it moves radially exerts internal pressure. The retaining bead 24 is also here generate a pressure acting radially inwards. He. will but at the same time in the longitudinal direction of the jacket 12 are under the action of strong axial forces that the retaining bead ' seek to pivot outwards «These axial forces in the jacket but will have little effect on the support bead.20 «This will rather seek to move inward and try to in relation to. Haitewulst 24 - to cause a pivot there, where the bead part 14 is thinnest, i.e. in the region - ~

dee transition '42 " The support bead 14 seeks the retaining bead ziim _L pivoting inwards and. at the top, ie in the opposite direction of the axial forces of the jacket. This also applies in and of itself to the design shown with full lines, but here the great thickness of the upper part of the Y / ulstteiles 14 partially seeks to pivot ^'lower: · part of Stützwulstea counteract "the" leverage "-Einwirkung I. between", supporting bead 20 and the retaining bead-24 was thus at j - the known training lower than in the inventive _ training, but was in the known Training replaced by the not insignificant radial pressure exerted by the upper.

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Part of the support bead was exercised, and which the one ■ " downward pressure action of the retaining bead 24 supported.

In the "particularly expedient embodiment of a bottle cap according to the invention according to FIGS 1. The inside 44 of the retaining bulge 24 has a relatively low height; This has an upper side 50, which is characterized by a curvature 52 with a relatively large radius of curvature, which is at least equal to the thickness of the jacket 12, but preferably about 50 % greater , the curvature in the extension of the outside 22 of the jacket a transition 54 passes, which is lower than the transition 46 between the inside 44 of the retaining bead 24 and the conical bottom 48 · Di © outside ite 56 of the support bead 20 is conically pointed upwards, so that the support bead 20 receives a relatively large thickness over its entire height despite the conical underside 48 of the retaining bead .24. The underside 58 of the support bead 20 is the same. As in the known embodiment, horizontally, provided that the capsule axis is vertical.

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• in comparison to the known capsule shown in Mg. 1 results in a capsule according to Pig. 2 a very substantial material saving, in that it only weighs about 1.3 g using the same material, ie it only needs 80% of the amount of material in the capsule shown in FIG Capsules of the type shown in FIG. 2, when placed on a test mandrel, have an internal overpressure of about 16 atmospheres, ie an overpressure which is only slightly lower than that which the known design is able to withstand.

From J ¹ Ig. 3 shows how the capsule shown in FIG. 2 is deformed when it is placed on a bottle, the neck of the bottle is denoted by SO the bead part 14 has its greatest expansion. When comparing ¹ Pig. 2 and 3 'is slightly -. "." ,, recognizable that the capsule when placed in the front-described and "3" shown form would have to accept _f It should also be sehenig that in this form no substantial resistance to the capsule Aufsetsen is to be expected when: the capsule is put on by means of a device which exerts vertical pressure on the upper side 50 of the support bead -20.

In Fig. 4 the capsule is in the final on g © s eta. th "state shown. The support bead 20 necessarily rotates inwards Bending moment. the retaining bead 24 from * Ss is also can be seen ,, w ^ .e the underside 58 of the Stlitääwulstea 20 because of the |

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Informing the bead part 20 inwards and upwards more pointed

ttft? d. This allows the center tongue of an ordinary bottle opener easily slide under the underside 58 and there

attack. At the same time it can be seen how essential it is is that the curvature 52 has a relatively large radius of curvature Has. That would be a relatively sharp transition between the top 50 of the support bead 20 and the extension of Outside 22 of the jacket 12 is provided, so the support bead would 20 under the influence of a bottle opener

loaned to be pivoted outwardly around the transition 54 without the Holding oil 46 to operate directly, so that only the supporting Action, the support bead - holding the capsule - on the Retaining bead 24 can be reduced. In practice, the pressure in a beer and mineral water bottle is significantly lower than that the pressure inside the bottle »e.g. during pasteurization or during transport under vibration, -and the reduction of the effect of the "supporting bead on the retaining bead is therefore usually not sufficient to ensure that the capsule can be removed. If, on the other hand, the curvature 52 has a relatively large radius of curvature, an upward pivoting of the support bead 20, which is carried out by means of a bottle opener, have the effect that the retaining bead 24 is also pivoted towards ai Shen, and the capsule can therefore be easily removed if desired. In the one shown in FIG known capsule, however, it is better that the corresponding transition has a very small radius of curvature, otherwise try the axial tensile forces in the dumbbell 12 in this training

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are to pivot the support bead 20 outward, which is its holding effect will reduce.

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A particular embodiment of a bottle cap according to the invention is shown in FIG. This embodiment differs from the form shown in FIG. 2 only by the formation of the support bead, which in the embodiment in FIG transforms. The transition line 54 is located almost at the same height as in the transition 36 between the upper side 38 and the inside 44 of the retaining bead. With this capsule, the material savings are even greater, as it only weighs around 1.2 g. It can be put on by means of a placement device of the same type as for placing the so-called crown cork capsules, ie a stamp with a conical inside. The relatively weakly dimensioned supporting bead 20 will also have the same effect in this embodiment as described above, but this effect is supported in the embodiment according to FIG is pressed in under the protruding bead of the bottle neck, so that the underside 62 of the supporting bead 20 - after the capsule is attached to a bottle - is almost vertical. The führuiigsforti in this Off ¹ according to Fig .. 5 the front S does ζ bead 40 exerted inward opening torque on the retaining bead 4 and 24 together with the above-mentioned permanent deformation of the "support bead, 20, which causes the same

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becomes stiffer, has the consequence that the in J? ig. 5 , despite the relatively small dimensions of the outer bead 28, is able to withstand an overpressure of about 12 atmospheres on the test mandrel, ie to meet the standardized pest control requirements. The one in Pig. 5 bottle capsule shown is very cheap to manufacture because of its low material consumption, but causes, at least in connection with the plastics known today, that the support bead 20 due to the permanent deformation in the * ready attached capsule has a different appearance than the other parts of the capsule . If the capsule is made of a colored plastic, the support bead will be considerably lighter with a white or gray tinge compared to the rest of the capsule; if the capsule is made of a colorless plastic, it will have a gray appearance, and it will be the same Pail if the capsule is made from a white plastic. In most cases this will prevent the capsule from being used in practice. It is, however, soluble that plastics or dyes for plastics can be produced which make it possible to prevent such a change in the appearance of the deformed support valve 20.

As can generally be seen from the above, a bottle cap according to the invention is compared to the already known ones, e.g. the ^r r: Pig. 1, have several advantages, namely .'lower weight, ie smaller material requirements, safe operation ■ ^? : ^ en at high speed and easy weight loss raittols

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the usual bottle opener, while a capsule according to Fig. 1 requires a specially trained bottle opener '. Further a capsule according to the invention has a property that in any case for the consumers of the bottles of not insignificant The advantage is, it has been shown that when a Capsule according to the invention - such as that of Fig. 2 - in unused State cannot be applied to a bottle by hand, the capsule, once it has been used as a bottle cap and then removed using a bottle opener " can be used again to close a bottle from which part of the contents has been removed because Once the capsule has been removed, it can be re-opened by hand Can attach the bottle. . "" ".-. It has also been shown that ζ.Bc the capsule according to Fig. 2 - itself after 8 to TO times of use - is able to on the Probedorn "an overpressure of et> a 10 attl to i '/ lder stand and to keep their tightness. This effect of the invention. proper training is most surprising and difficult to explain. Perhaps it stems from the fact that during the decrease, by means of a bottle opener local overexertion of the material is generated by Wulst.teil 14, so that a quick axial 2one it becomes more easily expandable than the rest of the retaining bead and thereby enables it to be put on by hand while the non-deformed parts of the Ealtewulstes hold their V / irkling retained on the capsule.

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Since the jacket 12 is not significantly stressed even when it is removed, the removal does not reduce the tightness of the re-attached capsule.

The invention is not bound to the embodiments shown and explained, which can be modified many times within the scope of the invention. So 44 dee Haltewulßtee 24 may, for example, the height of the inside within fairly wide limits vary if they should be of the retaining bead to the inner edge of the top side and at least half the height and should have preferably between 0.5 and 0.8 of the latter height, and it does not need to be straight, but can be rounded. It seems, however, as if the inside 44 must have a certain expansion, because it has been shown in tests that the holding ability decreases relatively sharply when the height of the inside 44 goes down below a certain value. This plays a minor role in practice because the inner edge of a certain Mindestaus- must have also measured purely gußtechnischen reasons. It should also be noted that although the conical underside 48 of the retaining bead 24 is shown in the drawing with a straight surface line, there is no obstacle to the surface line being slightly curved in both the outward and inward directions * The same applies for the outside 56 of the support bead 20. Incidentally, if the capsule is cast in a form in which the

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corresponding shaped surfaces have rectilinear surface lines as a result of the solidification shrinkage, the mentioned areas of even slightly concave. ;

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Claims (4)

File number: P 1 432 l60.9 (F 42 494 III / 64a) Applicant: F.G.M. & Co., Copenhagen my reference: A 9345 New demands 1. One-piece closure cap made of resilient plastic for bottles and the like. Vessels that have a convex shape Have beaded mouth and in which high internal pressures can arise, whereby the cap is rounded at the top Has shell part, the diameter and height of which are smaller than the mouth bead of the vessel, and the the Muzzle bead tightly enclosing jacket part over its entire height when the cap is attached to the vessel is stretched in the circumferential direction as well as in the axial direction, and the cap as the lower cap edge has a bead part adjoining the shell part, which is provided with an inwardly directed support bead and its height is at least equal to half the difference between the largest outside diameter and the smallest inner diameter of the bead part, characterized in that the axial height of the support bead (20) from the transition (54) of its top (50) to the outside (22) of the shell part (12) of the cap to the lower edge (58) of the bead part is to be measured, smaller, but not less than half as large as the height that lower part of the inner surface of the cap, which extends from the inner edge (36) of the top (38) of the holding 909815 / Q163 U 3 21 GU. a 9345 ~ 88. ■; - ■ - ■ - bead (24) extends to the lower edge (58) of the bead part, and that the underside (48) of the retaining bead (24) is a downwardly widening truncated cone surface. 2. Closure cap according to claim 1, characterized in that that also the outer surface (56 'or 62) of the support bead a downward widening- is a truncated cone surface. ---. 3. Closure cap according to claim 1 or 2, characterized in that the radius of curvature at the transition (52) between the top (50) of the support bead (20) and the outside (29) of the jacket (12) is greater than the thickness of the jacket, 4. Closure cap according to claim 1, 2 or 3, characterized in that the support bead (29) has a conical outer surface (62) at least over the greater part of its height, which at the same time forms the top of the support bead (Figure 5). 9 0 9 8 15/0163