EP1786694B1 - Press-twist closing device for containers - Google Patents

Abstract

The invention is directed to a closing device for a closure lid made of sheet metal suitable for opening by twisting, as well as a support device on or for such closure lid, as well as the closure lid itself and a process of making such closure lid. The closing device includes a lid panel; a skirt portion on an edge of the lid panel; a seal extending from a circumferential section of the lid panel into the skirt portion. In addition, the closing device has a non-metallic safety ring that includes two circumferentially extending sections, configured as a safety section with a strip section, shaped to project radially inwards and axially upwards, as well as a connecting section for attaching the safety section on an axially lower end of the skirt portion. The skirt portion has a lower end rolled up from radial outside to radial inside by more than 180° to form a roll-up portion, the roll-up portion being at least partly clasped, or is claspable, by the connecting section from an inner side of the skirt portion.

Description

The invention relates to a closure device on a closure cover, wherein the lid serves to seal containers and is thereby pressed by an axial pressure on thread ridges from above, forming negative in a compound depressed threaded elements in the lid. These lids can then be opened by turning, from which the term of a PT-closure lid (Press Twist) derives. Also affected by the invention is an assembly method of a securing device for such a lid for closing an upper open end of a container, esp. Glass container.

Such PT closure caps are known as a type of white cap closure caps, for example EP-B 450 959 (CMB), especially there FIG. 2 in a cross section with a threaded ridge 16 on the container neck and a compound 30 which on the one hand seals at the axial end of the trunk and on the other hand defines a threaded counter-element relative to the threaded ridge 16. PT seals are well explained in Column 1, paragraphs 1 and 2. Other types of closure such covers (cap) are screw caps, such as DE-A 22 33 305 (Crown Bender ) or closure lid of the type of US-A 4,607,757 (White Cap), especially there FIG. 2 ,

From the DE-U 88 01 748.6 (Alcoa ) is a plastic fuse is known, which can be attached to metallic screw caps for bottles and similar containers with a Gewindehalsteil. The very brief description of the site is best understood from the single FIG. 1 in cross-section, with the relevant explanation that two hook parts are connected to each other via a Abtrennabschnitt (there 6), wherein the upper hook portion on an outwardly rolled metallic end flange of the lid and the lower hook member as a backup against a substantially axially downwardly facing surface engages the threaded neck. This is the locked state. The engagement surface of the locking does not take place on an upper lateral outer wall, but on a downwardly facing outer wall, which is directed substantially radially, but points axially downwards. The named reference closes the container mentioned there with an open end and an upper outer wall, wherein the lid has a lid mirror and a transition portion and a skirt portion. A bead (there 8) of the skirt portion is from an upper hook part (there 4) a Kunststoffgarantierings (there 3) by more than 150 ° embraced (there FIG. 1 ), wherein the Kunststoffgarantiering has a lower hook portion (there 5), which is torn off at webs (6 there). This is the comparison to the terminology of the claimed invention. A closure device according to the preamble of claim 1 is made EP 1 155 966 A1 (Crown ) known.

It is an object of the invention to provide a locking ring that can be conveniently, easily and easily attached to the metal closure cap and forms a seam between a tamper evidence (usually called Tamper Evidence) and the screw-shaped cover sheet metal. There are many to many tamper-evident closures, all of which functionally have in common, that a single opening of a closure must be visible from the outside, so that in an intact closure (called "seal") from an original sealed packaging can go out. The goods to be packaged and the hulls accommodating them are complex, ranging from food and glass containers, which are closed with metal closures, to metal containers, which are also sealed with metal closures.

The stated object is achieved by a closure device according to claim 1.

The cover as such, which is made of sheet metal, can not guarantee the safety indication (the seal), it forms only the object, which is secured. The lid has a lid mirror, a circumferential skirt portion, which is aligned substantially perpendicular to the lid mirror, and has a sealing layer in the skirt portion, which also extends to a peripheral portion of the lid mirror (edge-side). This area serves on the one hand as a seal on the front side of the container body, and on the other hand as a thread to be formed with respect to the container provided on the cam or threaded pieces, each extending here a piece far circumferentially, but in the circumferential direction and axial direction staggered and inclined.

The circlip is not made of metal, for example, it is made of a plastic which allows it to be resilient on the one hand and on the other hand also to allow a thin spot which can be torn off to indicate the "first opening".

The securing portion and the connecting portion constituting the two functional parts of the securing ring have a securing portion folded strip section, which is also called J-band in this technical field, cf. to US-A 4,981,230 (Marshall ) or from the DE-U 88 01 748 (Alcoa ), there FIG. 1 ,

This J-band is arranged on the securing portion and forms the folded-over strip portion, which engages in the closed state under a radial projection of the trunk and thus has an initially blocking effect on an opening movement. The so-called strip section, which initially blocks against axial displacement of the cover, is arranged on the securing section. This in turn is connected via the connecting portion with a curl of the lower end of the apron section, fixed here elastic clamping.

The elastic clamping is effected at a lower end of the skirt which is rolled over more than 180 °, which curling takes place radially inwards, towards the inside with respect to the skirt portion of the cover. The connecting section ensures the clamping attachment. The fuse section holds the J-band and causes the current lock. Both are connected to one another via a (possibly circumferentially distributed) thin point, so that they are at least partially separated from each other during axial removal, caused by rotation, and indicate the opening.

Said thin point may consist of a plurality of circumferentially distributed webs which are formed so thin that they break or tear easily, wherein the force with which the connecting portion engages the curled portion of the lid, is greater than the force which Separation or tearing of the thin site is required.

The encompassing is also done on a Umfassungs-angle which is greater than 150 ° and takes place around the rolled-up lower end portion of the lid skirt.

It is therefore smaller than the angle of the curl, but sufficient for holding on the sheet metal lid.

The plastic part thus formed can thus be infected from the bottom axially of the metallic lid, thereby attacks on the roll and adheres to the connecting portion fixed (see assembly method according to claim 24). In the assembled state, the lid then has a peripherally extending connecting portion, which is arranged at the lower edge in a clamping or gripping manner and which extends radially inside (to the inside of the lid) can not dodge so far that the grip contact is released without separating the thin point.

This is ensured by a not widely selected circumferential limit distance between an inner wall surface relative to the handle region (at the connecting portion) and the radially pointing, provided on the container projection. The connecting portion with handle portion is designed so that a radially inwardly directed deflection of the handle portion just does not ensure that the cross-connection of the locking ring from the rolled-up lower edge of the sheet metal cover (completely) can be solved. Thus, the fuse is reliably achieved, as well as the easy mounting of the locking ring, which is arranged by clamping and gripping the curl.

To ensure the placement of the locking ring are facing two annular surfaces (claim 16, claim 17). The formed gap between these surfaces is smaller than the overhang of the nose portion over the most inwardly projecting surface segment of the rolled-up portion (claim 19). Thus, slipping out of the grip portion from the holding position on the curled end portion of the skirt can be avoided (claim 18).

The gripping elements, which engage around the curl from the inside of the apron portion, are circumferentially spaced apart individual projections, not necessarily a circumferentially completely continuous collar-shaped projection. The elastic compliance of the plastic part helps in this case and allows the over reaching and latching of these individual, circumferentially limited extending projections on the inwardly facing side of the Randeinrollung the skirt portion.

By "inside" is meant not the interior of the curl, but the reference to the closure lid, which has radially seen from the inside an inner side, which can be described as meaning to be formed cylindrical wall along the perimeter apron.

The curl is first displaced outwardly over an outwardly directed saddle of the skirt wall and then formed radially inward, preferably a whole curl of close to 360 ° is selected. It forms a great resistance and has a great inner stability to give the gripping link section a foundation for its holding function.

The securing portion and the connecting portion together, together with the folded-over strip portion form the securing ring according to claim 1.

The gripping takes place with the gripping region providing at least 150 ° of circumferential gripping contact, preferably more, up to about 240 ° to 270 ° for greater circumferential contact at the ring curl than the lower edge of the skirt portion.

The folded strip form as a J-band can be designed to be bendable on a film hinge, which is circumferentially interrupted in several places and thus forms windows through which liquid can drain, but also the folding can be facilitated, with less internal resistance to the umknickende or umfaltende Movement of the strip section.

Of the circumferentially distributed webs between the securing portion and connecting portion may be provided to determine the tensile force several. They can be chosen in the range between essentially five and twenty. They may have a small circumferential extent, as well as a narrow radial dimensioning to be easily separated and at the same time as evenly as possible to connect the securing portion and the connecting portion over the entire circumference with a small minimum distance, to see in the assembled state as a continuous gap from the outside is.

In the case of the partial encasement, with regard to the connecting portion, both the circumferential direction in the direction of the skirt and perpendicular to it the circumferential direction about the roll are meant. The circumferentially spaced handle segments on the connecting portion are a partial encasement, as well as the wrap of Randeinrollung which is greater than 150 °, but in any case less than 300 °, in particular less than about 270 ° (claim 9).

Assuming, hypothetically, a plane corresponding to the median plane through the convolution and which is parallel to the panel, one can define four quadrants comprising the convolute, the first quadrant being outside, top, then anticlockwise, three more quadrants. The third quadrant (inside, down) is completely occupied by the encompassing connection section, , the adjacent second and fourth quadrants only partially, wherein in the fourth quadrant the enclosure can be extended. As a result, this leads to self-holding by positive locking, in particular by additionally applied adhesion.

When gripping around, one has to understand the radial dimension in such a way that it is aligned with the entire cover, that is to say that the roll-in from radially inward (as viewed radially from the outside with respect to the curl) is at least partially encompassed. This direction is called cover-inside. The encompassing takes place on the outside of the roller track. This encompassing is metaphorically seen only in a sectional view and additionally extends at least partially in the circumferential direction for a cylindrical container. This is limited in peripheral sections possible, in terms of one or more partial-extent extension (s).

The defined plane as the median plane of the curl may be the beginning of an encirclement, with strongly outwardly protruding connecting section (extension into the fourth quadrant).

The weakening of the webs is measured by the desired function. They are to be separated when the metallic part of the lid moves upwards or circumferentially (by the rotational movement), at the same time this rotational movement should not be too difficult due to the blocking function of the webs (as a thin spot). The weakening is thus based on the purpose of use and on the one hand can be so weakly defined that the opening is not additionally made much more difficult, on the other hand be so strongly defined that an immediate tearing of the thin spot is not possible. "Weakness" and "strength" likewise define the thin spot which connects the two functional parts of the securing device - as intended, separable -

The tearing or breaking between the two circumferential parts, at the thin point, occurs as a result of the opening movement. The major component of the tearing or breaking force may be axially directed, as well as circumferentially, when the folded tab portion adheres to the vessel wall by friction and creates a circumferential force that causes cracking or fracturing, at least as a component of an effective separation force. It is therefore intended to speak of an axial tensile component and of a circumferential bending component, which may occur alone or in combination to effect the separation, as a result of an opening movement of the closure device.

It is understood that the encompassing of cover inside with regard to the curl only circumferentially sections can be done so that grip as a connecting portion gripping tabs in spaced circumferential position around the inside of the curl, laying down the securing portion.

An arcuate design of the inner surface of the gripping noses lends itself to This arcuate design should be geometrically adapted to the curl, so that a close-contact system is possible. In this context, a toroidal surface is given at least in sections, but not a complete toroidal shape. The toroidal shape detects the curl at its circumference in the rolling direction and along the circumference of the lid (coordinates ρ (rho) and φ (phi) in the system of spherical coordinates).

As far as a curl was spoken, it extends in the direction of the curl by more than 270 °, preferably also above 315 °, to form a virtually complete curl. Between the top of the curl and the cantilevered saddle portion of the skirt portion as an intermediate region between the skirt and the curl, there is provided a space which can receive the encompassing nose portions. Tension forces do not work here.

A further description of the gripping takes place via the angle measure, which angle measure is a different measure than that of the curl as such. The gripping can be done over more than 160 °, preferably more than 220 ° to about 270 °, but is well below the Einrollungsmaß (the Einrollungswinkel) of the lower end of the skirt portion, also: edge portion of the circumferential holding portion.

Due to the flexibility of the gripping area of the securing ring and the relative stability of the curling, an axial pushing is possible by machine (claim 27). In addition, gluing or welding or other aids can be used.

Figur 1

ist eine Seitenansicht eines Verschlussdeckels mit einem Deckelspiegel (Panel) 10, der auf einem Behälter aufgesetzt ist, welcher nur im oberen Rumpfwandbereich 80 seines Halses gezeigt ist. Ein Sicherungsring 40 ist zwischen Behälterhals und Verschlussdeckel in Seitenansicht zu erkennen.

Figur 2

ist eine Schnittdarstellung entlang der Ebene A-A von Figur 1.

Figur 2a

ist ein Ausschnitt als Kreisbereich, der in Figur 2 dargestellt ist, nur vergrößert. Hier ist die Randeinrollung 21 der Schürze 20 des Verschlussdeckels gegenüber einem radialen Vorsprung 81 der Rumpfwand 80 zu erkennen.

Figur 3

zeigt ein weiteres Ausführungsbeispiel in derselben Ansicht wie Figur 1.

Figur 4

ist eine Schnittdarstellung der Ebene A-A von Figur 3, mit der Kennzeichnung eines Ausschnittes (Kreisbereich am rechten Rand), welcher in der folgenden Figur abgebildet ist.

Figur 4a

ist die Ausschnittsvergrößerung des Kreises von Figur 4, in der die Einrollung 21 am unteren Rand der Schürze 20 des Verschlussdeckels dargestellt ist, gegenüber einem radialen Vorsprung 81 der Rumpfwand 80.

Figur 5

ist eine erweiterte Variante der Ausführung nach Figur 2a.

Figur 6

ist eine erweiterte Variante der Ausführung nach Figur 4a.

Exemplary embodiments explain and supplement the claimed invention.

FIG. 1

Figure 11 is a side view of a closure lid with a lid (panel) 10 mounted on a container shown only in the upper body wall portion 80 of its neck. A locking ring 40 can be seen between the container neck and cap in side view.

FIG. 2

is a sectional view along the plane AA of FIG. 1 ,

FIG. 2a

is a section as a circular area in FIG. 2 is shown, only enlarged. Here, the Randeinrollung 21 of the skirt 20 of the closure lid relative to a radial projection 81 of the fuselage wall 80 can be seen.

FIG. 3

shows a further embodiment in the same view as FIG. 1 ,

FIG. 4

is a sectional view of the AA plane of FIG. 3 , with the marking of a section (circle area on the right edge), which is shown in the following figure.

FIG. 4a

is the detail enlargement of the circle of FIG. 4 in which the curl 21 is shown at the lower edge of the skirt 20 of the closure cap, opposite a radial projection 81 of the fuselage wall 80.

FIG. 5

is an advanced version of the design FIG. 2a ,

FIG. 6

is an advanced version of the design FIG. 4a ,

In FIG. 1 a side view of a closure cap is shown, which is a PT-closure lid (press-twist). The closure lid is formed of sheet metal and closes a hull, of which only a neck portion 80 is shown. This neck section is cylindrical and can be cut in the FIG. 2 , be viewed along the plane AA in an opening. The axis 100 forms the central axis, which is formed in the center of the cylindrically shaped lid with its upper circular lid mirror as a panel 10. At the edge region 10 a of the panel 10 is a Transition portion 12 is provided, the arcuately in an apron 20 passes, the saddle-shaped 29 protrudes outwardly at the bottom and leads into a roll 21 whose inner end 21 a is bent by nearly 360 °, so that a nearly circular, full curl arises, as in the enlarged detail of the FIG. 2a seen.

Due to the cantilevered out saddle portion 29, a furthest inner arc portion of the curl 21 does not protrude further inward than the skirt 20 before it projects outwardly beyond the saddle 29. At the front (radially outer) end of the projection 29 of the skirt portion extends over an arc in the connection almost cylindrical, in the sectional view of FIG. 2a as a straight longitudinal section 28 can be seen before the curl begins, which is located below the cantilevered saddle 29.

The straight section, starting from the saddle 29, is designated by 28, starting from it starts the curl 21 and ends at the inner edge 21 a.

The edge region 12, which is located between the panel and skirt 20, receives a sealing layer 25, the upper portion 25 a extends almost horizontally, in a circumferential groove 10 a of the lid mirror, opposite the front end of the neck 80 with the opening 90. In the almost vertically extending skirt portion 20 is a further portion of the sealing material 25, here named 25b, for forming a threaded portion after the axial pressing of the lid on the only indicated in the side view recognizable and circumferentially limited provided, slightly inclined threaded portions on the container neck (on the outer Wall). These are in FIG. 2a above the vertical section 25b of the sealing material 25, which is still visible there at the lower end.

As the sealing material is any conventional compound to use, which brings a certain elasticity, for sealing and at the same time maintains a certain stability to accommodate the embossed threaded sections and to be available for a rotating opening.

In FIG. 1 a collar 40 is provided as an annular portion below the curl 21, wherein a gap 34 can be seen, the basis of the enlarged detail of FIG. 2a is explained in more detail from the FIG. 2 comes.

The peripheral portion 40 is a securing portion with an integrally formed, radially inwardly and upwardly projecting strip portion 41, which via a film hinge 41 a in FIG. 2a is apparent. It engages under a radial projection 81 of the container, which is to be closed. The film hinge 41 is not circumferentially continuous, but provided with individual, not visible here breakthroughs or windows to facilitate the folding or folding of the strip portion 41 and / or to be able to derive the liquid collected down. The securing portion 40 is in FIG. 2a shown in mounted state on the vessel. How he gets there, will be explained later.

First, a further gripping or connecting portion 30 is provided above the portion 40, which serves the attachment of the securing portion 40 on the lid, or at the provided at the lower end of the skirt 20 rolled-up portion 21. For this purpose, it is arc-shaped outwardly open and has outwardly projecting lugs 32a and 32b, while the gripping portion 32 has a rolling surface corresponding surface curvature and extending perpendicular thereto in the circumferential direction.

In the in FIG. 2a out FIG. 2 out enlarged Sicfierungsbereich a plurality of circumferentially distributed and spaced projections 32 a are provided, which extend over the drawn there center plane E and hold on to the rolling 21 . Accordingly, an approximately 90 ° to the plane E extending gripping portion is provided below the plane E, which forms a nose radially outward, the in FIG. 1 can be seen as a black strip below the roll 21 and above the peripheral strip 40. A remaining height distance, which is not occupied, but forms a gap, is in FIG. 1 also recognizable and in FIG. 3 in the axial sectional view and enlargement between the lower surface of the projection 32 b and the upper surface of the main body 43 of the securing portion 40 is provided.

At the radially inner end, a plurality of circumferentially distributed webs 42 is provided, which have as thin areas in comparison to their circumferential distribution only a very small circumferential extent and are formed very thin in the radial direction. They can be separated or torn off when the roller 21, together with the gripping area 32, 32a, 32b, initially rotates circumferentially and moves upwards through the thread ridges. Due to the engagement of the J-shaped (hence the name J-band) collapsed fuse strip 41, the securing portion 40 with its components 41, 41a, 43 of the upward movement, possibly also a circumferential movement not follow and become the thin spots 42 demolished, in particular separated. In order to permit this separation, the gripping area 32 with its projections 32a, 32b must not discharge from the inwardly rolled-out curl 21 and must remain fixed thereto, even if a yielding and movement radially inward is possible and permitted

For this purpose, two dimensions "a" and "b" are drawn, once the distance of the inner wall surface 35 of the gripping portion 30 and once the radially outwardly facing outer surface 81a of the projection 81, which also extends circumferentially. Both circumferentially extending strips face each other and form a gap, which in section the FIG. 2a as distance "a" appears. The distance "b" is that from the inner surface of the curl 21 to the radially outer end of the upper protrusions 32a. In order to be able to hold reliably, ie to fulfill the gripping function of the connecting portion 30, "b" is not smaller than "a", preferably chosen slightly larger, so that a sliding down and complete release of the gripping engagement of the projections 32a despite the radially inwardly yielding movement at axial tensile load is not possible. In this case, the inner surface 35 touches the radially outwardly facing blocking surface 81a of the projection 81 and blocks further slipping of the gripping portion of the very stable curl 21 in itself.

To mention is the transition portion 33 of the gripping portion 30 to the webs 42, which form the thin points and the underlying main body 43 of the securing portion 40, which in FIG. 1 can be seen in the side view.

The size and manner of encircling the gripping portion 32 about the inwardly rolled inner roller 21 is in FIG. 2a selected between 160 ° and 170 °, represented by the angle α. Here, this angle is less than 180 °, but not so small that the condition of holding during the axial upward movement is not satisfied.

The assembly of the locking ring 40 is carried out before pressing the lid on the container. The closure lid with the panel 10, the transition section 12 and the skirt 20 and the curl 21 is manufactured separately. Also, the securing portion 40,30, for example, made of plastic separately. Thereafter, the parts are mechanically assembled by moving them axially together and engaging the gripping tabs 32a over the inwardly projecting surface of the curl 21. This axial movement and engagement may also be referred to as "clicking", which provides for handling and tonal performance in mounting equivalent. The skilled person would speak here of a click on the plastic securing portion 40,30, based on the metallic portion of the closure lid or its Einrollung 21. When clicking on the strip section already exists.

The strip portion 41 is when mounting (click) already in the folded state, both possibilities are given that it is already manufactured in this form or is initially made projecting down and then on the film hinge 41 a radially inward and axially upward folded over to obtain the shape FIG. 2a , It depends on the choice of the injection molding process and the way of special manufacturing, which has both possibilities for realization open.

The sealed combination sheet metal lid and plastic part is pressed axially downwards until the band 41 slides over the radial projection 81, the securing portion 40 yielding elastically outwards, without the gripping portion 32 having its grip acting from the inside to the outside radially on the curl loses. If the container thus sealed later opened by turning the shutter, ruptures the remaining plastic part at the thin point 42 (the sum of the individual small webs in the circumferential gap 34) from the securing part 40 and leaves the latter in a detached state remain on the container. A third party can recognize the larger gap 34 from the outside, the one-time opening becomes visible and the thin area 42 can not be restored so that the locked container can be given an originally unopened state by deception action.

Under normal circumstances it is not possible to separate the plastic part from the metal part after closing and in the closed state without tearing said thin point. This is ensured by the gripping area 32, which is inaccessible from the outside to those locations which reach the latching or locking, namely the inwardly / upwardly and under the metal skirt 29, 28 hidden projections 32a, respectively, a plurality of circumferentially distributed and spaced projections. The latter allowed the initial axial collapse of the sheet metal part and the locking ring in the not yet assembled state of the closure lid on the container to mechanically simplify and machine to perform.

The detailed description of the Figures 1, 2 and 2a can with regard to the nearly identical reference numerals also on the figure triple of Figures 3, 4 and 4a be transmitted.

Here is the FIG. 3 very similar to that FIG. 1 Here, this portion is displaced more radially outward and designated 32b ', but still part of the functionally same gripping and connecting portion 30. In addition, at the radially outer End of the horizontally extending lower projection 32b ', which extends continuously circumferentially, a cylindrical strip 32c is provided, which projects far radially and up to the plane E upwards, which was previously described as the median plane of the curl 21. This more developed peripheral projection 32c is also in the FIG. 3 can be seen above the retaining ring 40 remaining the same height by partially over the curvature portion of the curl 21 in the fourth quadrant of this roll 21 attacks. The remaining components of the closure lid, panel 10, skirt 20 and outwardly cantilevered saddle 29 with vertical sloping edge 28 are unchanged. Is still closed, the upper neck 80 of an internally provided with an opening 90 container.

The skirt portion 20 is also called a retaining portion, after its object is holding over the compound 25b, which cooperates with the screw cams of the container. In the transition section 12, the end-face seal of the sealing material 25a is provided as previously described.

In FIG. 4a For example, the combination of the grip and connection portion 30 and the circlip 40 will also be collectively referred to as a multi-component circlip that communicates with the thin point 2, that is, a plurality of spaced lands, and when opened, separates into two parts of circumferentially extending nature.

The encompassing of the inside with an outwardly open, partially toroidal shape extending gripping portion 30 to the rolled-up lower skirt portion 21 is in FIG. 4a more pronounced and more than 150 °, chosen between 240 ° and 270 °. Encircling to a greater extent, in particular more than 300 °, is of little use. An optimum can be found between the amount of plastic material required and the necessary holding and gripping function that goes between a minimalist approach FIG. 2a and a rather lusher approach FIG. 4a including all intermediate versions.

The distance "a" is in turn provided between the two opposing annular surfaces 35, 81a, in a corresponding manner is also the here In FIG. 4a to determine dimension "b" which is not drawn and to select larger than "a". A seal or welding, the connection to the curl 21st strengthen. This resulting from heat and / or pressure firmer connection is not shown separately.

In two further embodiments, the embracing becomes even more pronounced, in each case with respect to either FIG. 2a or the FIG. 4a , whose description is referred to, as far as the FIGS. 5 and 6 are affected.

In FIG. 5 is opposite the FIG. 2a a more upward shift expression of the gripping portion 32 in the nose 32b of FIG. 2a intended. In FIG. 5 For this purpose, a cross-section substantially triangular shape is provided, which extends the clasping over the entire second quadrant, so that there is an enclosure angle of slightly more than 180 °. The axially upwardly projecting projections 32e on the more pronounced lugs 32d come closer to the metallic saddle portion 29, but do not touch it, so that a minimum distance is maintained.

An obliquely downwardly extending outer surface 32d 'of each of the lobes 32d has a different inclination, as the weaker inclined saddle surface 29 and open approximately in the transition portion from the first to the second quadrant as radially outer ends of the gripping tabs 32d, with the subsequent arcuate inner radius, the for embracing the roll 21 is used.

A comparable embodiment of these upper lugs 32d can be found in the FIG. 6 , while retaining the portion more pronounced at the bottom and outside with the portion 32b ', 32c FIG. 4a , This results in a circumferential gripping angle of almost 270 °, without touching the saddle sections 29 'of the metallic part of the lid with the inclined surfaces 32d'.

In FIG. 5 The enclosure takes place from the inside to the outside radially on a little more than two quadrants. In FIG. 6 the enclosure takes place on almost three complete quadrants. Here, too, all intermediate angles can be realized. All other components are as based on the FIGS. 2a or 4a explained.

Claims (27)

1. Closure device having a closure lid made from sheet metal to be opened by rotation, which has

   (1) a lid panel (10);

   (2) an apron section (20) at the edge of the lid panel (10);

   (3) a seal (25; 25a; 25b) which extends from a peripheral section of the lid panel (10) into the apron section;

   (4) having a securing ring (40, 30) made from non-metal, which has two peripherally running sections which are designed as

   (4a) a securing section (40) having a moulded-on strip section (41) projecting radially inwards and axially upwards;

   (4b) a connecting section (30) for attachment of the securing section (40) to an inwardly curled, axially lower end of the apron section (20);

   (5) characterised in that a lower end (21) of the apron section curled from radially outwards to radially inwards by more than 180° is engaged (32; 32a, 32b) at least partly by the connecting section (30) of the securing ring (30, 40) from the inner side.
2. Closure device according to claim 1, wherein an essentially horizontal plane (E) runs essentially through a centre of the curl (21), and the engagement is effected at least from the lid inner side, but from the curl outer side, in particular the engagement terminates axially above the plane (E), in particular on the inner side of the lid extends clearly beyond the plane.
3. Closure device according to claim 2 or 1, wherein the connecting section (30, 32) or its ability for engagement (32, 32b', 32c) of the inwardly curled end (21) extends on the lid outer side to essentially the level of the plane (E) as a central plane of the curl (21).
4. Closure device according to claim 1, wherein the securing section (40) is coupled to the connecting section (30) as a thin point (42) via distributed weakened connecting bars, which thin point is designed so weakly or only so strongly that it can be torn or is broken during opening of the closure lid caused by rotation by at least one axial tensile component, in particular also by a peripheral force component.
5. Closure device according to claim 1 or 2, wherein the engagement (32) of the curl (21) being effected from the inside is effected via nose sections (32a, 32d) running peripherally in sections and which are spaced peripherally, in particular each nose section (32a, 32d) has an arc-like inner surface which is suitable for receiving the curl (21).
6. Closure device according to claim 1, wherein the strip section (41) can be folded over or is folded over.
7. Closure device according to claim 1 or 6, wherein the curl (21) extends from radially outwards to radially inwards by more than 270°, preferably essentially above 315°.
8. Closure device according to claim 1 or 6, wherein the connecting section (30) engages essentially on the curl (21) with holding forces without applying axial forces or tension forces on a projecting intermediate section (29) of the apron section (20).
9. Closure device according to claim 1 or 2, wherein the engagement is based on an ability for engagement of more than 150° and less than 300°.
10. Closure device according to claim 1, wherein the engagement is effected on an angle (α) of more than 160°.
11. Closure device according to claim 10, wherein the engagement is effected on more than 220°.
12. Closure device according to claim 1, wherein an edge section (21) of the holding section designed as an apron is curled on an angle which is greater than 270°, in particular greater than 315°, as far as a complete curl (21, 21a) for which one free end (21a) virtually touches a peripheral strip (28) of the apron from the inside.
13. Closure device according to claim 1, wherein the securing ring (40, 30) consists of two functional sections which are connected to one another in a tearable or breakable connection via several connecting points (42) to separate the blocking securing section (40) from the connecting section (30) of the securing ring by a tensile force acting axially and/or at least partly peripherally.
14. Closure device according to claim 1, wherein the connecting section (30), but not the metallic curl (21), are radially flexible to permit axial sliding-on and after sliding-on to exert radial locking or clamping forces and to prevent falling off.
15. Closure device according to claim 1, wherein an engaging connection between the connecting section as a gripping region (30) and the curl of the lower end of the apron section (20) is reinforced, in particular by welding or sealing or with the aid of pressure and/or heat.
16. Closure device according to claim 1, wherein the securing ring (30, 40) in the height region of the connecting section (30) has a ring surface (35) pointing radially inwards and running essentially peripherally.
17. Closure device according to claim 16, wherein the ring surface (35) extends over a height which is greater than a diameter of a curl (21) as the edge section which is remote from the panel as the lid panel (10).
18. Closure device according to claim 16 or 17, wherein the ring surface (35) has an internal diameter which - in the closed state of the closure lid on a body - has such a short distance (a) from a wall section (81, 81a) of the body lying opposite the ring surface that release of the securing ring (30, 40) directed axially downwards is blocked by the curl (21).
19. Closure device according to claim 16 or 18, wherein partly peripheral engagement above a central plane of the remote edge section designed as a curl (21) on the apron section (20) extends (b) radially further outwards than the distance (a) of the ring surface (35) measures from the wall section (81a) of the body to be closed.
20. Closure device according to claim 1, wherein the connecting section (30) is adapted to engage in self-holding manner by positive connection, in particular also by frictional connection, on the curled lower end of the apron section (20).
21. Closure device according to claim 2 or 9, wherein the engagement is effected in three quadrants of the curl (21), in particular the third quadrant is completely covered.
22. Closure device according to claim 21 wherein virtually the complete second quadrant and/or virtually the complete fourth quadrant is covered by the connecting section as the gripping section (32; 32a, 32b, 32c).
23. Closure device according to claim 1, wherein the seal is a sealing layer (25a, 25b).
24. Assembly process of a securing device on a closure lid made from sheet metal to be opened by rotation, which has

    (1) a lid panel (10);

    (2) an apron section (20) at the edge of the lid panel (10);

    (3) a sealing layer (25) which extends (25a; 25b) between a peripheral section of the lid panel and into the apron section;

    (4) wherein a securing ring (40, 30) made from non-metal is used which has two peripherally running sections,

    (4a) a securing section (40) having a strip section (41) arranged thereon and projecting radially inwards and upwards, and

    (4b) a connecting section (30), with which the securing section (40) is attached to a curled lower end section of the apron section (20);

    (5) and wherein a lower end section of the apron section curled from radially outwards to radially inwards over more than 180° as curl (21, 21a) during attachment of the connecting section (30) of the securing ring is engaged (31, 32, 32a, 32b) at least in sections by means of inner-side engagement, as a result of which the securing ring is attached to the curl (21, 21a).
25. Assembly process of a closure device according to claim 24, wherein the strip section (41) is a strip section (41) which can be folded over or is folded over.
26. Assembly process according to claim 24, wherein attachment is clicking on.
27. Assembly process according to claim 24 or 26, wherein attachment, in particular clicking on, is effected by a machine, axial movement towards one another.

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