EP1768916A1

EP1768916A1 - Method for peeling off or separating a sealing film sealed onto the rim of the neck of a bottle or the like and screw cap for carrying out said method

Info

Publication number: EP1768916A1
Application number: EP05771872A
Authority: EP
Inventors: Rainer Ammann
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-07-01
Filing date: 2005-06-30
Publication date: 2007-04-04
Anticipated expiration: 2025-06-30
Also published as: US20110155687A1; DE102004032100A1; JP2008504176A; US20080083694A1; RU2007103837A; NO339274B1; RU2346869C2; AU2005259424B2; CA2572379C; CY1111657T1; EP1768916B1; NO20070667L; US9517869B2; CN101001791A; JP4981666B2; AU2005259424A1; ATE482891T1; ES2358878T3; WO2006002922A1; DE502005010314D1

Abstract

A screw cap for separation of a sealing film or foil that is sealingly attached to a rim of a neck of a container as the cap is removed from the container. The screw cap has a complementary thread to the thread on the neck of the container for installation of the cap on the neck. The screw cap can be unscrewed at any later point in time. When the screw cap is unscrewed from the neck, the cap includes a knife with an edge positioned to separate the sealing film from the rim 11 of the neck 3 by radially starting from the periphery of the rim and progressing inwardly.

Description

Method for detaching or separating a sealing foil and screw cap sealed onto the edge of the neck of a bottle or the like to carry it out

process

The invention relates to a method for at least ^" partial detachment or separation of a sealing surface having a circular seal surface of an external thread and a central axis neck of a vessel, a container, a bottle od. Like. Sealed sealing film, wherein the external thread of the such a sealed neck is screwed onto a female thread having an internal thread having screw cap and unscrewed at a selected later date again.

The invention further relates to a screw cap for carrying out this method.

If you want the possibly already sterile content z. B. a bottle for a long time from external influences, such as the penetration of microbes or other contaminants protect, then it is still state of the art, aufzusiegeln on the mouth edge of this bottle an impermeable to these substances sealing film such that the actual sealing surface of these substances not can be penetrated. For usual

Plastic bottles made of, for example, polyethylene (PE) or polyethylene terephthalate (PET) are generally used aluminum foils, on its sealing side a coating with z. B. HDPE (High Duty Polyethylene) od. Like. Have. After placing such a sealing foil on the edge of the bottle, the coating of the sealing foil is welded to the edge of the bottle. The sealing film then adheres firmly and imperviously to the edge. Instead of a weld can also take place a bond.

Then, in this prior art, the screwing of a screw cap to protect first the sealing film, which is then by the consumer after unscrewing the screw cap and, if present, tearing off a tamper-evident ring on the same to solve by hand or can be deducted, to get to the content. Especially with only partial consumption of the contents of the bottle, the bottle with the remaining remainder of the contents can then be closed again by re-screwing the screw cap.

It is now perceived by the consumer as uncomfortable, with each fresh, z. B. containing milk or fruit juice, bottle not only need to unscrew the screw cap, but also to be forced to detect an over the edge of the neck of the bottle protruding circumference of the sealing film and then deduct the same, which requires a certain skill. The object underlying the invention will now be seen to provide a method and a screw cap for carrying out this method by which a special seizing and peeling the sealing film by hand after unscrewing the screw cap is unnecessary.

This object is achieved in a method of the type mentioned according to a first embodiment of the invention in that when unscrewing the screw cap from the neck, the sealing film from the outer periphery of the edge of the neck forth radially inwardly towards the central axis progressively- through the screw at least partially is released and then lifted off the edge.

It may optionally be provided to then keep the detached sealing film in the screw cap.

The process of unscrewing the screw cap thus includes according to the invention, the release of the sealing film from the edge of the vessel or the bottle and possibly also the subsequent storage of the sealing film in the screw cap, which can be screwed on and unscrewed as often as usual, again until the container contents are exhausted by respective removal. Separate release of the sealing film by hand has become unnecessary.

Advantageously, before the first screwing the screw cap on the external thread of the neck coated on one side with an adhesive 5 007056

- 4 -

Reinforced plate is inserted into the screw cap and pressed in the subsequent screwing with the adhesive against the sealed at the edge of the neck sealing film, wherein after completion of screwing a surface bonding of the reinforcing plate is carried out with the sealing film. In this way, there is a convenient reinforcement of the generally quite thin and flexible sealing film, which serves to facilitate the attack by the screw on the sealing film.

It is preferable to use induction welding for bonding the stiffening plate to the sealing film by using a thermoplastic adhesive as the adhesive.

It is also possible to reinforce the sealing film in that from the outset, that is to say when sealing the neck of the vessel or the bottle, a reinforcing plate already reinforced or even sufficiently stiffened or resistant to bending is used.

Furthermore, an adhesive, a lamination or else a sealing lacquer of, for example, PE, PET, polyester or polystyrene or of a combination of these substances can be used as the adhesive on the surface of the stiffening plate facing the sealing film.

A screw cap for carrying out the method according to the invention has a lid portion and a An internally threaded sleeve portion with a screw-on, for screwing on and unscrewing from an external thread of an edge having a neck of a bottle od. Like. Hermetically sealed by means of a sealed to a circular sealing surface of the edge of the neck, a radially projecting ümfangsbereich owning, sealing foil which is releasable and / or destructible to release a bottle contents.

According to the invention, this screw cap and thus a first device solution of the above object is characterized by at least one between the internal thread and the lid portion on the sleeve portion along the inner circumference arranged in the starting position before screwing obliquely to the screw-in and out towards the center axis of the neck or the Screw cap-facing cutting blade, whose distance from the central axis before screwing is smaller than the outer diameter of the edge of the neck, and which is elastically deflected when screwing the screw cap on the neck of the bottle, the cutting blade with its cutting edge due to the pressure of the edge of the neck and the peripheral region of the sealing film resiliently folds upwards and above the external thread and below the radially projecting circumferential region of the sealing film, elastically deformed and spring-biased towards the center axis, on the outer circumference of the neck for investment e comes as soon as the screwing is completed, and in that when unscrewing the screw cap, the cutting edge of the severing knife is initially directed obliquely to the sealing foil and the central axis, and subsequently continuously penetrates more and more radially inwardly toward the central axis between the projecting peripheral region of the sealing film and the edge of the neck of the bottle, the sealing film from the edge of the bottle towards the center axis progressively separable and preserved in the Aufschraubkappe between separating blade and lid portion is.

As can be seen, the screw cap according to the invention triggers when unscrewing the od at the free edge of the neck of the bottle or the like. Sealed seal film in that the Abtrennmesser from the outside between the edge of the neck of the bottle and the sealing film, if necessary, to about the inner diameter of the neck out, gradually penetrates toward the center axis of the same and entrains the sealing film after loosening, since the separated sealing film is held between the separating blade and the lid portion.

In a preferred embodiment, a plurality of individual, along the inner circumference of the sleeve portion in ümfangs- or rotational direction distributed and fixedly connected to the sleeve section separating blades are provided, which leave a clear width in planar radial position in the common plane in the region of the central axis, which has a lesser width Has diameter than the annular sealing surface, or as it has the outer diameter of the edge of the neck of the bottle od. Like. Has. Depending on the properties of the adhesive used and thus the intensity of the compound can it may already be sufficient if the severing knife separates the sealing film only partially by its spiral cutting and causes its remaining lifting or tearing off simply by the further lifting of the peripheral region of the sealing film during further unscrewing and thus by the tension exerted on the sealing surface of the sealing film.

In this case, each individual severing knife expediently has a cutting edge partially pointing in the unscrewing direction, which in each case causes the spiraling inward cutting into the sealing surface between the sealing film and the edge of the neck.

Each cutting edge may advantageously be curved concavely and have a radially projecting, in Abschraubdrehrichtung trailing tip cutting projection, which favors the penetration into the sealing surface.

It is particularly expedient that on the inside of the lid portion of the screw cap at least one, around the central axis and the circumference of the sealing film with possibly its reinforcing plate opposite arranged, Andrucklippe is formed, which when tightening the screw cap the ümfangsbereich of sealing film and optionally reinforcing plate on press the edge of the neck and cling to it.

This deformation of the periphery of the sealing film on the one hand and the reinforcing plate, if present, on the other hand also favors the penetration of the or the separating knife into the gap between the sealing film and the edge, since the circumference of the sealing film and optionally of the reinforcing plate forms an obliquely to the sealing film and to the central axis facing guide for the or the separating blade, such that the or the separating blade between the sealing film and the edge sliding and progressively unscrewing the screw more and more issuing in a horizontal cutting plane and thereby between the sealing film and edge to, if necessary, in the free space in the clearance of the neck penetrating the sealing film can completely replace or can. If the separation knife or the other od then further from the edge of the neck of the bottle. Like. Stand out, it or they can largely return to its original position, she or she had before screwing the cap or had, namely obliquely to Aufschrauböffnung and the center out.

If only one separating knife is present, it can be formed circumferentially along the inner circumference of the sleeve section, ie as a ring knife. The elasticity of the material of the screw cap ensures the required deflectability of this ring diameter in the direction of the central axis.

However, it should be emphasized that the described orientation of the or the separating knife (s) in his or her original position in which it or before screwing the screw cap on the neck of the container or the bottle obliquely to the screw-on and after pointing towards the central axis or pointing, does not necessarily have to be so. Rather, the Knife alignment by the configuration of the knife shape on the one hand and the respective terminal on the sleeve portion along the inner circumference on the other hand also be taken so that the or the Abtrennmesser obliquely to the lid portion and inwardly towards the central axis has or point. In this case, the severing knife or the cut-off knife already essentially has the orientation that it or they need or need for the process of separating the sealing film from the neck.

The above object is further achieved in a method of the type mentioned above according to a second embodiment of the invention also in that before screwing the screw cap on the neck of the container od. Like. An intermediate layer of a

Adhesive and / or a sealing wax between the lid portion and neck is introduced, that when screwing the screw cap on the neck of the container, the intermediate layer is pressed by the inner surface of the lid portion on the sealing film, and that subsequently the inner surface is glued or welded to the surface of the sealing film such that the sealing film firmly adheres to the inner surface and that when unscrewing the screw cap from the neck of the container or the bottle, the sealing film is at least partially entrained by the screw cap.

This entrainment takes place in the direction of rotation of the screw cap, the entrained portion of the sealing film adheres to the inner surface of the lid portion. The respective container is thus completely or at least partially opened after unscrewing the screw cap, so that the contents can be removed.

Advantageously, in this case, the sealing film within the clear width of the neck in the circumferential direction at least partially embossing or perforations, which are designed as predetermined breaking points, and the bonding or welding of the inner surface of the lid portion with the surface of the sealing film is using the liner only in the range of made the embossments or perforations surrounded area.

This creates the opportunity to inspect a central region of the sealing film controlled when unscrewing the screw cap.

Appropriately used as a sealing film, a plate which is composed of at least two layers, wherein the inner surface of the lid portion facing layer of substantially PE, PET or aluminum and the neck facing layer of PE, PET or sealing wax or a combination of may consist of the abovementioned substances.

In this case, the formation can be made such that only the inner surface of the lid portion facing layer of the sealing film within the clear width of the neck is at least partially coined or perforated in the circumferential direction. The embossing or the perforation is preferably circular in circumference.

A preferred screw cap for carrying out the method according to this second embodiment of the invention and thus a second device solution of the above object, in particular of plastic, with a cover portion and a sleeve portion having an internal thread with a screw-on for screwing on and unscrewing an external thread of a According to the invention, the neck of a bottle or the like which has an edge and which is hermetically sealed by means of a sealing foil sealed to an annular sealing surface of the edge of the neck

I characterized in that the lid portion has a reverse anvil-like, the inner surface having, inner, tabular, protrusion, such that this inner surface when screwing the screw cap on the neck of the container od. Like. Reliable for engagement with the surface of the sealing film can be brought.

The vessel used, the container used, the bottle used or the like can be made of glass, plastic or the like.

Preferably, the sealing foil, which consists in particular of aluminum and / or of plastic, has a peripheral region projecting radially beyond the edge of the neck. This peripheral region forms an additional guide for the or the separating blade, so to speak as a barrier to the lid of the screw cap, in particular, as soon as in the presence of a Andrucklippe the same lifts off when unscrewing the screw cap and such a peripheral region, which had previously nestled, progressively releases, such that the or the separating blade is guided under this peripheral region at the same fitting to the sealing surface or be.

The screw cap according to the invention is preferably made of plastic.

The invention is explained in more detail below with reference to preferred embodiments shown in the drawing.

It shows:

Fig. 1 is a side view of a first embodiment of a screw cap according to the invention before placing on the

Neck of a bottle and before screwing on the same, in a partially cut

Side view of both the screw cap and the

neck;

Figure 2 is a view according to Figure 1 after the start of screwing the screw cap in a position on the neck of the bottle, in which the cutting edge of a separating blade just touches the surface of the sealing film on the edge of the neck. Fig. FIG. 3 shows the screw cap according to FIG. 2 in a further screwed middle position, in which the severing knife rests in a substantially horizontal position on the sealing foil; FIG.

FIG. 4 shows the screw cap according to FIG. 3 in a further screwed-on position, in which, however, the severing knife is not completely folded upwards; FIG.

5 shows the screw cap according to the preceding figures in a screwed-on end position, in which the severing knife is also in an upwardly folded end position and a pressure lip arranged on the inside of the lid section of the screw cap has been elastically deformed against the sealing foil;

Fig. 6 is a detail of Figure 5 on an enlarged scale.

Fig. 7 shows the screw cap of Fig. 5 after the start of unscrewing, after the cutting edge of the severing knife has already begun to penetrate between the edge of the container and the sealing foil;

8 after further unscrewing in a position in which the severing knife has already partially penetrated into the sealing surface; 9 shows the screw cap according to the preceding figures after further unscrewing in a position in which the severing knife has already detached the sealing film in a substantially horizontal position;

Fig. 10

Arrangement after the lifting of the screw cap according to the preceding figures from the neck of the container, with separated in the screw cap from the separating knife separated sealed foil;

Fig. 11

Bottom view of the screw cap in the direction of arrow X in

10 shows;

12 shows a screw cap according to the preceding figures during the pressing of a reinforcing plate by means of a press-in punch.

13 shows a second embodiment of the invention with a modified screw cap in a side view corresponding to FIG. 1;

Figure 14 is a plan view of the screw cap of Figure 13, partially cut away along the line XX-XX ..;

15 shows a section through the sealing film according to FIGS. 13 and

14; 16 shows a longitudinal section through a further embodiment of the screw cap according to the invention, in which the threads of the internal thread of the same each have interruptions in the region of the cut-off knife for receiving the same during the demoulding process.

In Fig. 1, the shoulder portion 2 of a bottle 1 is shown with a neck 3 having an external thread 4 and a central axis 5. Furthermore, a screw cap 7 having an internal thread 6 is shown, which, like the bottle 1, can be made of, for example, plastic, such as PE or PET. This screw cap 7 is provided with a cover portion 8 and a female portion 6 having sleeve portion 9 with a screw-10, for screwing on and unscrewing of the external thread 4 of an edge 11 having neck 3 of the bottle first

This neck 3 is hermetically sealed by means of a sealed to a circular sealing surface 12 (Fig. 10) of the edge 11 of the neck 3, a radially projecting peripheral portion 13 possessing sealing film. This sealing film 14 is detachable and / or destructible for releasing the respective contents of the bottle.

According to the invention at least one between the internal thread 6 and the lid portion 8 on the sleeve portion 9 along an inner circumference 9 'arranged in the initial position shown in Fig. 1 radially obliquely to the screw-10 and inwardly toward the central axis 5 facing out cutting blade 15 is provided, the one Cutting edge 16 has, whose distance from the central axis 5 of the neck 3 of the bottle 1 before screwing is smaller than the outer diameter D of the edge 11 of the neck. 3

After the screw cap 7 has been screwed onto the neck 3 of the bottle 1, the screw cap 7 has already been screwed so far onto the neck 3 in the position shown in FIG. 2 that the cutting edge 16 touches the surface of the sealing foil 14. Upon further unscrewing takes place an elastic deflection of the severing blade 15 upward as shown in FIG. 3, in which the separating blade 15 is shown in a substantially horizontal position. 4, the severing knife 15 continues to fold upwards and in screwed end position of the screw cap 7 according to FIG. 5, the severing knife 15 springs with its cutting edge 16 as a result of the pressure of the edge 11 of the neck 3 and the circumference 13 of the sealing film 14 obliquely up. The separating blade 15 comes above the external thread 4 and below the radially projecting circumference 13 of the sealing film 14, elastically deformed and under resilient bias, on the outer circumference 17 of the bottle neck 3 to the plant. Its end position is also shown in FIG. 5.

5 is such that when unscrewing the screw cap 7 through, between the projecting periphery 13 of the sealing film 14 and the edge 11 of the neck 3 of the bottle 1 initially obliquely directed to the sealing film 14 and the central axis 5 and directed continuously below by their spring back more and more radially inwardly to the central axis 5 out circumferentially penetrating, cutting edge 16 of the severing blade 15, the sealing film 14 from the edge 11 of Bottle 1 towards the central axis 5 toward progressively separable and in the Aufschraubkappe 7 between Abtrennmesser 15 and cover portion 8 is preserved. The beginning of the attack of the cutting edges 16 on the sealing surface between the edge 11 or the same Sigelfläche 12 and the sealing film 14 is shown in Fig. 7.

In the illustrated, preferred embodiment, a plurality of individual, along the inner circumference 9 'of the sleeve portion 9 in the circumferential or screwing direction (double arrow A) distributed and firmly connected to the neck portion 9 Einzelmessern- 15 is provided according to the bottom view shown in FIG , which in plane radial position in a common plane in the region of the central axis 5 leave a clear width W, as shown in Fig. 3, which has a same or smaller diameter than him the circular sealing surface 12 of the edge 11 of the neck 3 of the bottle 1 od has the same. In the shown

Embodiment corresponds to the inside width W of the individual blade 15 of the clear width of the edge 11 of the neck 3. Furthermore, three cut-off 15 are provided here.

Needless to say, the invention is not limited to the three cut-off knives 15 shown in FIG. 11, but rather other numbers of cut-off knives depending on the materials used for the sealing film 14 and its connection to the sealing surface 12 of the neck 3 15 can be used. If only one separating knife 15 is present, it can be formed circumferentially along the inner circumference 9 'of the sleeve section 9, ie as a ring cutter (not shown), the elasticity of the material of the screw cap 7 and thus of the ring cutter for the required deflectability thereof in the direction of the central axis 5 worries.

Finally, concave curved cutting edges 19 have been used in the embodiment shown in FIG. 11, which have a radially projecting, in Abschraubdrehrichtung B trailing tip cutting projection 20, - so that the cutting edges 19 partially point in the unscrewing A or directed in the unscrewing A direction Own component. This embodiment appears to be suitable for facilitating the severing of the sealing surface. There are also other geometries of Abtrennmesser 15 conceivable that meet the task.

On the inner side 21 of the lid portion 8 of the screw cap 7 is a circular around the central axis 5 and the sealing surface 12 and thus the sealing film 14 with a reinforcing plate 22 used in this embodiment oppositely arranged, pressure lip 23 formed when screwing the screw cap. 7 presses the existing here peripheral region 13 of sealing foil 14 and reinforcing plate 22 to the edge 11 of the neck 3 and conforms to the same.

The Andrucklippe 23 remains due to their length and their effort when unscrewing the screw cap 7 in zurückzufedern substantially to their original position, first in decreasing contact with the top of the sealing film 14 and the reinforcing plate 22 before it completely stands out from the sealing film 14 and the reinforcing plate 22 during further unscrewing the screw cap 7.

If, as a result of the above, too great a flexibility in the peripheral region 13 of the sealing film 14 is required a priori to reinforce the latter in order to ensure perfect sliding of the individual blades 18 below the sealing film 14, then a reinforcing plate 22 can be provided even before sealing be connected with the top of the sealing film 14 surface, z. B. also by welding means of a thermoplastic or by gluing, thus even before the sealing film 14 is sealed onto the sealing surface 12 of the edge 11 of the neck 3 of the bottle 1.

In the presently preferred embodiment shown in the figures, however, it is expedient to proceed such that in each case a reinforcing plate 22 is inserted into a screw cap 7 according to FIG. 12 and pressed by means of a press ram 24 over the severing blades 15 in the direction of the lid section 8. The screw cap 7 with the stiffening or reinforcing plate 22 held by the separating blades 15 is then in the position shown in Figs. 1 and 2.

The procedure when unscrewing the screw cap 7 according to the embodiment shown from the position according to Fig. 5 or 6 in the position of FIG. 10 is as follows:

First, the cutting edges 16 push under the action of the existing restoring forces of the three Abtrennmesser 15 below the peripheral portion 13 of the sealing film 14 and lift it together with the edge of the overlying reinforcing plate 22, as Fig. 7 illustrates.

This is facilitated on the one hand by the fact that in the preferred embodiment shown on the neck 3 facing sides of the folded-off severing 15 expediently each a groove 25 to adapt to the rounding of the edge 11 of the neck 3 shown follows, and on the other hand, that the are adjacent to the cutting edges 16 on the side facing away from the neck 3 subsequent areas of the cutting blade 15 are rounded. The separating blades thus have, so to speak, in their areas adjacent to the cutting edges 16, a bend which favors the penetration of the cutting edges 16.

In this process, the Andrucklippe 23, which has first exerted its pressure in the entire dotted indicated region 26 (Fig. 6), partially lifted from the surface of the edge of the sealing film 14 and, in the case shown here from the inside to the outside of the edge of the reinforcing plate 22 from.

Upon further unscrewing penetrate the cutting edges 16 under elastic bending of the cutting blade 15 in the Area of the sealing surface 12 shown in Fig. 6 also dotted, see Fig. 8.

In the illustrated embodiment, the separating blades 15 have cut through the sealing surface 12 upon reaching the position shown in FIG. 9 and the sealing film 14 with the reinforcing plate 22 completely detached. Since the cut-off blades 15 endeavor to return to their original positions, which they held before screwing the screw cap 7 on the neck 3, finally results in FIG.

10 illustrated position of the separated sealing film 14 plus reinforcing plate 22 within the lifted screw cap 7 of FIG. 10th

A second embodiment of the invention is shown in FIGS. In this case, identical parts have been provided with the same reference numerals with the first embodiment.

Again, this is a method for at least partially detaching or separating a, on a circular sealing surface 12 owning edge

11 of an external thread 4 and a central axis 5 having neck 3 of a container, in particular a bottle 1 od. The like. Plastic, glass or the like. With a sealed, in particular made of aluminum and / or plastic sealing film 14 ', wherein on the external thread (4) of the neck (3) sealed in this way is screwed on a screw cap (7 ') which has an internal thread (6) which matches the external thread (4) and is unscrewed again at a selected later point in time. According to the invention, before the screw cap 7 'is screwed onto the neck 3 of the container or bottle 1, an intermediate layer 33 made of a thermoplastic, an adhesive and / or a sealing wax is applied between the lid section 8' or its inner surface 21 and sealing foil 14 '. Then, when screwing the screw cap 7 'on the neck 3 of the container 1, the intermediate layer 25 of the inner surface 21 of the lid portion 8' pressed onto the sealing film 14 'and then the inner surface 21 with the surface of the sealing film 14' welded or glued, so, that the sealing film 14 'adheres firmly to the inner surface 21 and that when unscrewing the screw cap 7' from the neck 3 of the container or the bottle 1, the sealing film 14 'is at least partially entrained by the screw cap 7' due to this adherence.

In this case, a sealing film 14 'is expediently used, which has at least partially embossments or perforations 28 within the clear width W of the neck 3 in the circumferential direction, which are designed as predetermined breaking points, wherein the bonding or welding of the inner surface 21 of the cover portions 8' with the surface of the Sealing film 14 'by means of the intermediate layer 25 only in the area of the embossments or perforations 28 circumscribed surface 32 is made.

The embossments or perforations reduce the force required for tearing open the sealing film 14 'when unscrewing the screw cap 7' considerably.

As a sealing film 14 'is in this embodiment a plate 31 (Figure 15) constructed of two layers 26 and 27, wherein the layer 26 facing the inner surface 21 of the lid portion 8 'is made of PE, PET or aluminum and the neck 3 facing layer 27 of PE, PET or sealing wax or a combination of these substances.

Preferably, the inner surface 21 of the lid portion 8 'facing layer 26 of the sealing film 14' within the clear width W of the neck 3 in the circumferential direction (double arrow Z, Fig. 14) at least partially embossed or perforated.

Further, in the preferred embodiment shown, the perforation (28) is circumferentially circular.

In a screw cap 7 'for carrying out the described method according to this second embodiment, again in particular made of plastic, with a cover portion 8' and a female thread 6 having sleeve portion 9 '' with a screw-10, for screwing on and unscrewing an external thread. 4 of an edge 11 having neck 3 of a bottle 1 od. The like. Plastic, glass od. Like., Which was hermetically sealed by means of a sealed to an annular sealing surface 12 of the edge 11 of the neck 1 sealing film 14 ', for releasing a bottle contents detachable and / or destructible, according to the invention has the lid portion 8 'a reverse anvil-like, the inner surface 21 having, inner, tabular, projection 32, such that when screwing the screw cap 1' on the neck 3 of the Container 1 or the like. The intermediate layer 33 through this inner surface 21 for engagement with the surface of the sealing film 14 'can be pressed. Thereby, a proper bonding or welding and thus a corresponding adhesion of the lid portion 8 'to the sealing film 14' and a reliable entrainment of the latter when unscrewing the screw cap 7 'allows. '

It has generally proven to be useful, the thread pitch and the thread pairing 4, 6 dimensioned such that the stroke of the screw cap 7, 70 relative to the neck 3 is about 9mm per revolution of the screw cap 7, 70 by 360 degrees.

The training can be made so that the internal thread 6 is three-speed.

FIG. 16 shows a further embodiment of the invention with a screw cap 70.

It is basically advantageous if the by the thread pitch and the threaded engagement of the respective used thread pairing 4, 6 of external thread 4 and internal thread 6 in screwed onto the container 1 position of the screw cap 7, 70 predetermined stroke between screw cap 7, 70 and neck 3 at least the Length of the separating blade 15 and the separating blade corresponds, which in turn corresponds to at least the radial distance of the inner circumference 9 'of the sleeve portion 9 from which the Abtrennmesser 15 starts, and an imaginary circle on the sealing surface 12 between the sealing film 14 and edge 11. Preferably, the imaginary circumference of the circumference of the periphery (11) of the neck (3) is formed, such that the Abtrennmesser 15 and the Abtrennmesser solve the sealing surface 12 in any case completely. However, this is by no means always necessary, but it may also be sufficient if the sealing surface 12 is not completely detached, ie the cutting edge (s) 19 does not penetrate so far, but only up to said imaginary circle in the region of the sealing surface 12 the edge 11 of the neck 3, in which case the complete detachment of the sealing film 14, 14 'by means of their peeling by lifting the screw cap 7 with the then under the edge of the sealing film 14, 14' lying separating blade 15 and then under the edge the sealing film 14, 14 'lying separating blades takes place.

According to a preferred embodiment of the screw cap 70 is or the separating blade 15 and the separating blade on the inner circumference 9 'of the sleeve portion 9 above the internal thread β arranged to the lid portion 8 and the thread of this internal thread 6 has interruptions 71 which u with respect to their width in the circumferential direction of the inner circumference 9 'of the width of the severing blade 15 and the Abtrennmesser are substantially equal or slightly wider, such that when removing the screw cap 70 upwards from the respective mold (not shown) the Abtrennmesser 15 and the Abtrennmesser down can be pushed into these interruptions 71 and find themselves in the same place at short notice, until they emerge from the mold and become free. This embodiment with the interruptions 71 allows a considerable saving in height of the screw cap 70 and thus plastic material, since the Abtrennmesser 15 can be arranged closer to the internal thread 6, and at the same time avoids problems with the removal of the screw cap 70 from their form, in particular has been injection-molded in the preferred use of plastic. Without the interruptions 71, the height of a screw cap must be necessarily greater, because when removing the same from the mold, the separating blade 15 once inevitably fold down and need to find space without the interruptions 71 completely above the threads.

Further, it is preferred that the severing blade 15 and the severing blades each have (s) free end (s) having the cutting edge (s), the seal (s) between the sealing film 14 and the sealing surface 12 upon engagement with the sealing surface 12 Edge 11 a curvature or buckling on the edge 11 to have or have (particularly clear from Figs. 3 and 6 refer). This favors the penetration of the cutting edge (s) 19 between the sealing film 14 and the edge 11, not only when the sealing foil 14, which is expediently made of aluminum and / or plastic, has a circumferential region 13 projecting radially beyond the edge 11 of the neck 3.

Preference is given to an embodiment in which the free end or the free ends of the severing blade 15 or the severing blade is additionally ^' bent on both sides or are, such that it or they a the rim 11th facing spoon-like concave curvature has or have (not shown). It has been found that such a form of Abtrennmesserenden performs a particularly good function in the separation of the sealing film 14, as it flattened when penetrating the sealing surface 12 elastic and the inherent restoring forces in addition to the existing wedge effect a separation force perpendicular to its surface up and down or on the one hand on the sealing film 14 and on the other hand on the edge 11 exerts.

Finally, the screw cap 70 can still on the inside of the lid portion 8 between at least one concentrically encircling, here relatively short, d. H. a low height, Andrucklippe 23 and the inner wall 9 'of the sleeve portion 9 have a circumferential counter-pressure lip 72 (Fig. 16), which presses when screwing the screw cap on the neck 3 against the sealing film 14 and is suitable when unscrewing the screw through their restoring force the edge of the sealing film 14 against the pressure of the ends of the or the Abtrennmesser 15 are supported, such that these ends better under the peripheral portion 13 of the sealing film 14 slide and can penetrate into the sealing surface 12.

It should be emphasized that this peripheral region 13 does not necessarily have to survive beyond the edge 11 of the neck 3. He also does not necessarily have a non-glued or not sealed peripheral edge to a proper grip from the cutting edge (s) 19 of the or the Abtrennmesser (s) 15 to ensure. The relevant respective embodiment according to the invention is dependent on the parameters given in each case, of which only the material of the screw cap itself, the material of the sealing film 14, the material of the binder used and the elasticity of the or the separating blade (s) called should be. In the case of the screw cap 70, for example, no reinforcing plate 22 is used for a sealing film 14 which may be necessary for this, as described in the preceding embodiments, for which reason the counterpressure lip 72 is advantageous here.

In addition, it should be noted that the pressure lip 23, whether in the embodiments of Figures 1 to 10 or in the embodiment of FIG. 16, not only the pressing of a peripheral portion 13 of the sealing film 14, if such a peripheral area is present, but also the repeated sealing of the neck 3 z. As a bottle 1 after the sealing film 14 has been lifted and the bottle after each unscrewing the screw cap 7, 1 'or 70 and the removal of a subset is screwed back to close the bottle tight again.

Claims

claims

1. A method for at least partially detaching or separating a, on an annular sealing surface (12) possessing edge (11) of an external thread (4) and a central axis (5) having neck (3) of a vessel, a container, a bottle

(I) or the like ^" sealed ^" sealing film (14), wherein screwed onto the external thread (4) of the sealed neck (3) has an external thread (4) matching internal thread (6) screw cap (7) and a selected later Is screwed off again, characterized in that, when unscrewing the screw cap (7) from the neck (3), the sealing film (14) from the outer periphery of the edge

(II) of the neck (3) forth radially inwardly to the central axis (5) towards progressively at least partially released by the screw cap (7) and then lifted off the edge (11).

2. The method according to claim 1, characterized in that prior to screwing the screw cap (7) on the external thread (4) of the neck (3) coated on one side with an adhesive stiffening plate (22) inserted into the screw cap (7) and on it following screwing with the adhesive against the at the edge (12) of the neck (3) sealed sealer film (14) is pressed, and that after the completion of the screwing a surface bonding of the stiffening plate (22) with the sealing film (14).

3. The method according to claim 2, characterized in that for surface bonding using a thermoplastic adhesive as an induction welding is used.

4. The method according to claim 1, characterized in that a by a flat connected

Reinforcing plate (22) reinforced or in itself already sufficiently stiffened or bend-resistant sealing film (14) has been used for the sealing of the neck (3).

5. The method according to claim 3 or 4, characterized in that as adhesive on the sealing film (14) facing surface of the stiffening plate (22) an adhesive, a lamination or a sealing wax made of essentially PE, PET, polyester or polystyrene, or of a coraquation of these substances.

6. screw cap (7) for carrying out the method according to any one of the preceding claims with a cover portion (8) and a

Female threaded (6) having sleeve portion (9) with a screw-on (10), for screwing on and unscrewing from an external thread (4) of an edge (11) having neck (3) of a bottle (1) od. The like., The has been hermetically sealed by means of a sealed to a circular sealing surface (12) of the edge (11) of the neck (3), a radially projecting peripheral portion (13) possessing sealing film (14) which is releasable and / or destructible for releasing a bottle contents , characterized by at least one between the internal thread (6) and the lid portion (8) on the sleeve portion (9) along the inner circumference (9 ') arranged in the starting position before screwing obliquely to the screw-on (10) and inwardly to the central axis (5 ) the screw cap (7) facing separating blade (15) whose distance from the central axis (5) before screwing is smaller than the outer diameter (D) of the edge (11) of the neck (3), and be in the screwing of the screw cap (7) on the neck (3) of the bottle (1) is elastically deflected, wherein the separating blade (15) with its cutting edge (16) due to the pressure of the edge (11) of the neck (3) and the peripheral region (13) of the sealing film (14) resiliently folds upwards and above the external thread (4) and below the radially projecting circumferential region (13) the sealing film (14), elastically deformed and resiliently biased towards the center axis, comes to rest on the outer circumference (17) of the neck (3) as soon as the screwing is completed, and in that when unscrewing the screw cap (7) the cutting edge ( 16) of the severing blade (15) is initially directed obliquely to the sealing film (14) and the central axis (5) and subsequently continuously by their spring back more and more radially inward to the central axis (5) out between the protruding peripheral region (13) of the sealing film (14) and the edge (11) of the neck (3) of the bottle (1) penetrates, wherein the sealing film (14) from the edge (11) of the bottle (1) towards the central axis (5) towards progressively separable and in the Aufschraubkappe ( 7) between the separating blade (15) and cover portion (8) can be preserved.

7. screw cap (7) according to claim 6, characterized in that a plurality of individual, along the inner circumference (9 ') of the sleeve portion (9) in circumferential or rotational direction (A) distributed and fixed to the sleeve portion (9) connected separating blades (15) is provided, which leave a plane width (W) at a planar radial position in a common plane in the region of the central axis (5), which has a smaller diameter than the annular sealing surface (12) of the edge (11) of the neck ( 3) of the bottle (1) or the like ..

8. screw cap (7) according to any one of claims 6 or 7, characterized in that each individual severing knife (15) partially in the Abschraubrichtung (A) facing cutting edge (19) or in the Abschraubrichtung (A) directed component thereof has.

9. Screw cap (7) according to claim 8, characterized in that the cutting edge (19) of the severing blade (15) is concavely bent and has a radially projecting, in Abschraubdrehrichtung trailing, sharp cutting projection (20).

10. screw cap (7) according to claim 6 or 7, characterized in that on the inside (21) of its lid portion (8) at least one, circular around the central axis (5) and the peripheral region (13) of the sealing film (14) If necessary, the clamping surface (13) of sealing film (14) and optionally stiffening plate (22) at the edge (11) of the neck (3) when integrally screwing the screw cap (7) is integrally formed on its stiffening plate (22) ) and thereby clings to the same.

11th

Screw cap (7) according to claim 6, characterized in that the severing blade (15) is formed as a circular blade along the inner circumference (9 ') of the sleeve section (9).

12th

Method for at least partially detaching or separating a sealing foil (14) sealed onto an annular sealing surface (12) of a neck (3) of a container (1) having an external thread (4) and a central axis (5) , wherein on the external thread (4) of the sealed neck (3) a to the external thread (4) fitting internal thread (6) having screwed screw cap (7 ') and unscrewed at a selected later time again, characterized in that prior to screwing the screw cap (7 ') an intermediate layer (33) of a thermoplastic, an adhesive and / or a sealing wax between the lid portion (8') and sealing film (14 ') is introduced, that when screwing the screw cap (7') on the neck ( 3) of the container (1) the intermediate layer (33) from the inner surface (21) of the lid portion (8 ') on the sealing film (14') is pressed, and then that the inner surface (21) with the surface of the S iegelfolie (14 ') is glued or welded, such that the sealing film (14') on the inner surface (21) firmly adhering and that when unscrewing the screw cap (7 '), the sealing film (14') of the screw cap (7 ') is at least partially carried away.

13.

A method according to claim 12, characterized in that the sealing film (14 ') within the clear width (W) of the neck (3) in the circumferential direction at least partially embossments or perforations (28), which are designed as predetermined breaking points, and that the bond or Welding of the inner surface (21) of the lid portion (8 ') with the surface of the sealing film (14') by means of the intermediate layer (25) only in the area of the embossments or perforations (28) circumferential surface (32) is made.

14th

A method according to claim 13, characterized in that the sealing foil (14 ') used is a plate which is made up of at least two layers (26, 27), wherein the inner surface (21) of the lid portion

(8 ') facing layer (26) of substantially PE, PET or aluminum and the neck (3) facing layer

(27) consists of PE, PET or sealing wax or a combination of the abovementioned substances.

15th

A method according to claim 14, characterized in that only the inner surface (21) of the lid portion (8 ') facing layer (26) of the sealing film (14') within the clear width (W) of the neck (3) in the circumferential direction at least partially coined or perforated.

16.

A method according to claim 13, characterized in that a circumferential circular embossing or perforation (28) is used.

17th

Screw cap (7 ') for carrying out the method according to one of the preceding claims 12 to 16, in particular made of plastic, with a cover portion (8') and a sleeve portion (9) having an internal thread (6) with a screw-on opening (10) for screwing on on and unscrewing from an external thread (4) of a rim (11) having neck (3) of a bottle (1) od. The like. By means of an annular sealing surface (12) of the edge (11) of the neck (3 ) sealed sealer film (14 ') is hermetically sealed, characterized in that the lid portion (8') has a reverse anvil-like, the inner surface (21) having, inner projection (30), such that upon screwing the screw cap (7 ') Intermediate layer (33) through this inner surface (21) for engagement with the surface of the sealing film (14 ') can be brought.

18th

Method or screw cap (7) according to claim 1, 6, 12 or 17, characterized in that the vessel (1) used, the container or the bottle or the like is made of plastic, glass or the like.

19.

Method or screw cap (7) according to claim 1, 6, 12 or 17, characterized in that the sealing foil (14), which consists in particular of aluminum and / or plastic, has a peripheral area (21) which projects radially beyond the edge (11) of the neck (3). 13).

20th

Screw cap according to one of the preceding claims, characterized in that it consists of plastic.

21st

Screw cap (7, 70) according to one of Claims 6 to 11 and 17 to 20, characterized in that the thread pairing (4, 6) of external thread (4) and internal thread (6) used in each case by the thread pitch and the thread engagement of the respectively used thread pairing the container (1) screwed position of the screw cap (7, 70) predetermined stroke between the screw cap (7, 70) and neck (3) at least the length of the severing blade (15) or the separating blade corresponds, said length in turn at least the radial distance the inner circumference (9 ') of the sleeve portion (9), from which the separating blade (15) extends, and an imaginary circle on the sealing surface (12) between sealing film (14) and edge (11).

22.

Screw cap (7, 70) according to claim 21 or 22, characterized in that the imaginary circle circumference is formed by the inner circumference of the edge (11) of the neck (3).

23rd

Screw cap according to Claim 21, characterized in that the thread pitch and the thread pairing (4, 6) are dimensioned such that the stroke of the screw cap (7, 70) relative to the neck (3) is approximately 9 mm per revolution of the screw cap (7, 70). around 360 degrees.

24th

Screw cap according to claim 21 or 23, characterized in that the internal thread (6) is three-flighted.

25th

Screw cap (70) according to any one of claims 21 to 24, characterized in that the separating blade (15) or the separating blade on the inner circumference (9 ') of the sleeve portion (9) above the internal thread (6) to the lid portion (8) is arranged out and the thread of this internal thread (6) has interruptions (71) which, with respect to their width (u) in the circumferential direction of the inner circumference (9 '), are substantially equal or wider than the width of the severing blade (15) or the severing blades, such that upon removal of the screw cap (70) upward from the respective mold, the severing knife (15) or the cutting blade down into these interruptions (71) are pushable and find themselves in the same place at short notice, until they emerge from the mold and become free.

26th

Screw cap (7, 70) according to one of claims 6 to 11, and 17 to 25, characterized in that the severing blade (15) or the severing knives each have (s) free (s) having the cutting edge (s). Have end (s), the or the attack on the sealing surface (12) between the sealing film (14) and edge (11) has a curvature or buckling on the edge (11) or have.

27th

Screw cap (7, 70) according to claim 26, characterized in that the free end or the free ^' ends of the severing blade (15) or the separating blade is additionally bent on both sides or are, so that it or they a has the spoon-like concave curvature facing the edge 11 or have.

28th

Screw cap (7, 70) according to claim 17, characterized in that on the inside of the lid section (8) between at least one concentrically surrounding pressure lip (23) and the inner wall (9 ') of the sleeve section (9) a circumferential counter - pressure lip (72; 16).