EP3448770B1 - Screw cap for large containers - Google Patents

Screw cap for large containers Download PDF

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Publication number
EP3448770B1
EP3448770B1 EP17717426.5A EP17717426A EP3448770B1 EP 3448770 B1 EP3448770 B1 EP 3448770B1 EP 17717426 A EP17717426 A EP 17717426A EP 3448770 B1 EP3448770 B1 EP 3448770B1
Authority
EP
European Patent Office
Prior art keywords
head plate
removal sleeve
closure
opening
removal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP17717426.5A
Other languages
German (de)
French (fr)
Other versions
EP3448770A1 (en
Inventor
Günter Krautkrämer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bericap GmbH and Co KG
Original Assignee
Bericap GmbH and Co KG
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Filing date
Publication date
Application filed by Bericap GmbH and Co KG filed Critical Bericap GmbH and Co KG
Publication of EP3448770A1 publication Critical patent/EP3448770A1/en
Application granted granted Critical
Publication of EP3448770B1 publication Critical patent/EP3448770B1/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D47/00Closures with filling and discharging, or with discharging, devices
    • B65D47/04Closures with discharging devices other than pumps
    • B65D47/06Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages
    • B65D47/10Closures with discharging devices other than pumps with pouring spouts or tubes; with discharge nozzles or passages having frangible closures
    • B65D47/103Membranes with a tearing element
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D47/00Closures with filling and discharging, or with discharging, devices
    • B65D47/36Closures with frangible parts adapted to be pierced, torn, or removed, to provide discharge openings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B67OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67DDISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D3/00Apparatus or devices for controlling flow of liquids under gravity from storage containers for dispensing purposes
    • B67D3/0029Apparatus or devices for controlling flow of liquids under gravity from storage containers for dispensing purposes provided with holders for bottles or similar containers
    • B67D3/0032Apparatus or devices for controlling flow of liquids under gravity from storage containers for dispensing purposes provided with holders for bottles or similar containers the bottle or container being held upside down and provided with a closure, e.g. a cap, adapted to cooperate with a feed tube
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2547/00Closures with filling and discharging, or with discharging, devices
    • B65D2547/04Closures with discharging devices other than pumps
    • B65D2547/06Closures with discharging devices other than pumps with pouring spouts ot tubes; with discharge nozzles or passages
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B67OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67DDISPENSING, DELIVERING OR TRANSFERRING LIQUIDS, NOT OTHERWISE PROVIDED FOR
    • B67D2210/00Indexing scheme relating to aspects and details of apparatus or devices for dispensing beverages on draught or for controlling flow of liquids under gravity from storage containers for dispensing purposes
    • B67D2210/00028Constructional details
    • B67D2210/00094Ergonomics
    • B67D2210/00097Handling of storage containers

Definitions

  • the present invention relates to a screw cap made of plastic for large containers, with a cylindrical outer jacket with a first internal thread of larger diameter and a head plate partially closing the outer jacket at an axial end, the head plate having an opening which in turn has a removal sleeve with a inside the Receiving outer jacket projecting, approximately cylindrical inner jacket with a second internal thread of smaller diameter, the top plate and the removal sleeve are firmly connected.
  • the extraction sleeve serves to receive and fix an extraction nozzle.
  • Such closures are typically used on large containers which have a volume of at least 3 l and often also a volume of 20 l and more.
  • Corresponding containers are known, for example, as "5 gallon containers" for receiving (and dispensing) drinking water.
  • Such containers have a container neck or opening socket with an external thread, onto which the outer jacket of the closure, which has a matching internal thread, is screwed.
  • screw caps typically have diameters in the range from 50 to 70 mm.
  • the thread of the outer jacket has a nominal diameter of approximately 55 mm and the maximum outer diameter is approximately 70 mm.
  • this screw cap with the larger diameter is generally not loosened, but rather is removed via a removal sleeve which is arranged in the opening of the head plate of the screw cap with a larger diameter.
  • the removal sleeve in turn has an internal thread into which a removal nozzle can be screwed.
  • the inner cross section of the removal sleeve is closed by a sealing disk which has to be opened or removed at least partially in order to remove liquid from the container.
  • the sealing disk could, for example, have a circumferential line of weakness and a ring eyelet, via which the sealing disk could be torn open along the line of weakness by engagement with a finger and removed from the removal sleeve.
  • the sealing disk is generally less easy to remove.
  • the consumer screws a corresponding extraction nozzle into the (smaller) internal thread of the extraction sleeve, so that the internal (open) end of the extraction nozzle is connected to the interior of the container.
  • the tapping point expediently has a valve.
  • the container can then be arranged, for example, overhead (with the screw cap pointing downwards), so that after opening the valve, the liquid, in particular drinking water, runs out of the tapping hole solely due to gravity.
  • This construction makes it possible to avoid having to loosen the screw cap with a relatively large diameter, this screw cap also being generally secured by a guarantee ring on the neck or opening of the container, which is obtained when the outer screw cap is unscrewed from the container neck is separated from its outer jacket and thereby indicates that the screw cap has already been opened at least once.
  • the screw cap with the large diameter and the container neck with a correspondingly large opening serve above all to fill the container quickly and efficiently.
  • US 5,259,534 discloses an outer jacket with a head plate and a removal sleeve according to the preamble of claim 3.
  • the present invention therefore aims to provide closures with the same functionality but which are easier to manufacture. Furthermore, the present invention also defines a method according to claim 11 for the production of corresponding closures and closure parts.
  • the object on which the invention is based is achieved in that the outer jacket with the head plate on the one hand and the removal sleeve with its internal thread on the other hand are produced separately from one another by injection molding, these two parts forming the complete screw closure by welding, alternatively by Glue, firmly and tightly connected.
  • the manufacture of the two closure parts is relatively simple in itself, these closure parts only being connected to one another after they have been manufactured become.
  • a particular advantage of this closure and the way it is manufactured is that conventional injection molds can be used for the individual closure parts, which, for example, only need to be equipped or modified with an additional part in order to produce one of the two required closure parts. This makes it possible to avoid the separate production of particularly complex injection molds.
  • the manufacture of the closures according to the invention is therefore significantly less expensive than the injection molding of the complete closures in a single operation in a molding tool.
  • the removal sleeve has at its outer end a flange edge surrounding the sleeve opening for the connection to an edge surface surrounding the opening of the head plate. This enables the flange edge to be welded together (or glued) over a relatively large area, with the respective opposite edge surface, as a result of which both closure parts are connected to one another in a particularly firm and tight manner.
  • energy direction sensors can be provided, for example, on the side of the flange edge facing the head plate or on the side facing the flange edge of the edge surface surrounding the opening of the head plate, which melt quickly during welding by means of ultrasound and one create the desired tight and tight connection with the opposite surface.
  • the energy direction transmitters are preferably projections which extend axially away from the respective surface and taper in the direction away from the surface.
  • the energy direction transmitters are triangular ribs in cross section, which run radially and / or in the circumferential direction on the flange edge or the edge surface.
  • the apex lines of ribs of triangular cross section are expediently located approximately on one common plane parallel at a distance to the plane of the edge surface or the flange edge on which the ribs are arranged.
  • the top plate of the closure has, on its outside, an axially recessed recess which surrounds the opening of the top plate and is dimensioned such that the flange edge of the removal sleeve can be received flush therein.
  • the axial depth of this annular recess corresponds to the axial thickness of the flange edge and expediently the inside diameter of the recess also matches the outside diameter of the flange edge, so that the head plate lies outside the recess together with the surface of the flange edge in a common plane and The flange edge and the top plate form a common, continuous annular surface which surrounds the opening of the removal sleeve and defines the top plate of the assembled closure.
  • the removal sleeve has an at least partially removable sealing disk.
  • a sealing disk expediently has a circumferential or at least largely circumferential weakening line in the vicinity of its outer edge, along which the sealing disk can be separated from the remaining part of the removal sleeve. By separating, the sealing disk can either partially or completely release the cross section of the removal sleeve.
  • a design of the closure is expedient, in which the sealing disk is generally not completely separated from the removal sleeve, but on one side, i. H. remains connected to the extraction sleeve within a small circumferential angle range. This prevents the sealing disk from falling into a container when it is cut off and thereby causing any faults.
  • the sealing disc also has to withstand considerable pressure and tensile forces in the area of the weakening line, especially since the closure is typically intended for large containers and usually has to meet so-called UN test conditions for approval.
  • the axial compressive force which is at least to be used to tear open the line of weakness is therefore considerable and can typically not be done by hand alone with an eyelet and without additional aids. Tearing open the line of weakness or partially or completely separating the sealing discs is therefore not trivial.
  • the internal thread of the extraction sleeve is provided for receiving an extraction nozzle, which typically has a closable extraction valve.
  • an extraction nozzle which typically has a closable extraction valve.
  • one end of this extraction nozzle engages with the sealing disk and at least partially separates it along the weakening line and presses it towards the inside of the container.
  • Such an extraction nozzle has a hollow cylindrical end with an external thread, the end face of which engages with the sealing disk when the nozzle is screwed into the extraction sleeve. For this, however, a considerable torque must be applied to the tapping nozzle or its threaded pin. While the nominal diameter of the internal thread of the outer jacket is typically and in corresponding embodiments between 38 and 60 mm, the internal thread of the inner jacket of these embodiments has a typical nominal diameter in the range from 18 mm to 30 mm.
  • the sealing disk on its side facing the outside of the closure and in the vicinity of the line of weakness in a small angular range, the sealing disk has an elevation which, when screwing in a removal nozzle, comes into engagement with the end face of the removal nozzle before other sections of the sealing disk have this end face of the extraction nozzle. This leads to the fact that the line of weakness of the sealing disk is exposed to a concentrated tensile load in this section of the sealing disk, where the elevation is provided, and tears open there first.
  • the force required for initially tearing open the weakening line is substantially less than if the end face of the extraction nozzle in an annular region along the weakening line along a larger circumferential angle section simultaneously with the sealing disk would engage.
  • the force exerted on the sealing disk when screwing in the removal nozzle therefore initially concentrates exclusively on the area around the elevation, where the line of weakness then also tears open, while as the screwing in of the removal nozzle continues, the adjacent sections of the line of weakness also gradually tear open, whereby the forces for further separation of such weakening lines are only relatively small after the initial tearing has already taken place.
  • a slight increase in the internal thread of the extraction sleeve can also contribute to reducing the required torque. This is advantageous, among other things, because the torque is transmitted, among other things, via the welded connection from the inner closure part to the outer closure part, which is loaded less with a lower torque.
  • the sealing disk or its line of weakness is expediently designed such that it remains connected to the removal sleeve on the side diametrically opposite the elevation when the removal nozzle is completely screwed into the removal sleeve.
  • the plane of the sealing disk (relative to a plane perpendicular to the closure axis) could be tilted slightly, so that the flat end face of an extraction nozzle only comes into engagement with the section of the sealing disk diametrically opposite the elevation just before reaching an axial end position.
  • a front section of the removal nozzle can be somewhat tapered radially and pass over a shoulder into a section of larger diameter, while the removal sleeve has a small, radially inwardly projecting shoulder outside the line of weakness of the sealing disc, on which the shoulder rests when the The extraction nozzle is screwed into the extraction sleeve as far as possible.
  • the removal nozzle can also have a shoulder outside the thread, which rests on the flange edge of the removal sleeve before the sealing disk is completely separated from the inner jacket of the removal sleeve.
  • the extraction nozzle and its design as such are not part of the present invention, but in particular the extraction sleeve is designed such that it is in tight engagement with the extraction nozzle in the manner described when the extraction nozzle is screwed into the extraction sleeve and the sealing disk is at least partially in pressed the inside of the container.
  • the internal thread of the removal sleeve has a pitch of at most 3 mm, preferably at most 2 mm at 360 °, which in the case of plastic closures and with a typical diameter of about 25 mm can be regarded as a fine thread.
  • the minimum pitch of such a thread is expediently 1 mm at 360 °.
  • the present invention also relates to the two individual parts from which the closure according to the invention is ultimately manufactured.
  • the first part of such a closure which consists of two assembled, tightly connected parts, has a cylindrical outer jacket with a first internal thread of larger diameter and a head plate which closes the outer jacket at an axial end, the head plate having an opening and an annular area around the opening is axially recessed.
  • such a first part of a closure can also protrude from the top plate have essentially axially extending, annular circumferential seal within the closure thread, which can come into sealing engagement with the inner surface of a container neck onto which the outer closure part is screwed.
  • the second part of such a closure is in the form of a sleeve which is closed on one side by a base at one axial end and has a cylindrical inner jacket with an internal thread and a flange edge which comprises an axial opening of the sleeve, the base near its outer circumference having a circumferential line of weakness and on one side one to the outside, ie towards the opening of the sleeve, facing elevation near the line of weakness, which axially protrudes from the other areas near the line of weakness.
  • outer jacket and “inner jacket” are used here to distinguish between the two cylindrical jackets of the closure, each of which has an internal thread and of which in the finished closure one surrounds the outer jacket of the entire closure and the other a jacket surrounding the central removal opening Are defined.
  • first and second closure parts can be produced relatively easily with the aid of conventional molds or molds, which may require slight modification, the corresponding molds not having to be particularly complex.
  • corresponding shaping tools are much less complicated to manufacture and set up than a shaping tool which would have to produce a closure which is integrally connected from the first and second closure parts.
  • Conventional molds can thus be used to produce the two individual parts, which are otherwise used to produce similar closure elements and which only need to be changed slightly, for example by additional inserts, in order to be able to manufacture the parts of the closure of the present invention. This is particularly important in view of the relatively small number of closures.
  • the present invention accordingly also relates to a method for producing a closure or closure parts, as described and defined above.
  • the first closure part namely a first larger screw cap
  • the second closure part namely a removal sleeve
  • the first closure part is produced by injection molding, which has a cylindrical cap jacket with an internal thread and a head plate, which in turn has an opening.
  • the second closure part namely a removal sleeve
  • the first closure part namely a removal sleeve
  • the term “inner jacket” is used here to distinguish it from the jacket of the outer screw cap referred to as the outer jacket.
  • the chronological order of manufacture of the two closure parts is not specified.
  • the terms "first step” and "second step” only serve to differentiate between the two processes. The only requirement is that both locking parts are in place before they can be welded together.
  • the removal sleeve is dimensioned in relation to the opening in the head plate in such a way that it can be aligned in circumferential contact therewith, the correspondingly aligned head plate and the removal sleeve being welded to one another and then connected in one piece and in principle forming the same or at least a similar configuration, like a one-piece cast closure of the type described above.
  • energy direction transmitters are expediently provided, which are designed in such a way that the initial friction is reduced or concentrated on small partial areas, which thereby heat up and melt very quickly.
  • the energy directors are expediently largely uniformly and at narrow intervals, so that the melted material quickly forms a coherent, circumferential layer and firmly and tightly connects the two closure parts along the outer circumference of the second closure part.
  • the flange edge could rest against the edge surface surrounding the opening of the first closure part both from the inside and from the outside, the application from the outside being preferred, the edge surface in particular forming the base of an axially recessed, annular recess in which the flange edge of the first closure part is picked up.
  • Figure 1 shows the closure 100 welded together from two parts in a perspective view obliquely from above and outside.
  • the terms above and “outside” refer to the view of a closure which is screwed onto the neck of a container standing upright. If, during use, the container is turned upside down for the removal of drinking water or another liquid, the closure is located at the bottom of the container.
  • the closure has an outer casing 1, on the lower edge of which a guarantee band 7 is arranged, which is connected to the outer casing 1 via easily breakable bridges (not shown).
  • the outer jacket 1 has a series of ribs 21, 21a which are intended to facilitate handling, in particular screwing and unscrewing, of the closure on a container neck.
  • the second closure part 20 has a circumferential flange edge 16 which is received flush in an annular recess 6 in the head plate 3.
  • the second closure part 20 forms a removal sleeve and has an inner jacket 11 with a central passage 14 and an internal thread 12.
  • the passage 14 is closed by a sealing disk 13 at the lower end of the removal sleeve 20.
  • the two closure parts 10 and 20 can be seen in section.
  • the outer, first closure part 10 has an outer jacket 1, on which an internal thread 2 is arranged.
  • a transversely extending head plate with an opening 4 extends approximately perpendicular to the jacket 1 at the upper end of this jacket (see Figure 3 ), which expediently extends concentrically to the closure axis 50.
  • this opening 4, which is formed or encompassed by a pipe socket 9 the removal sleeve 20 is arranged in turn has the inner jacket 11 with the internal thread 12 and a circumferential flange edge 16 at the upper axial end.
  • the lower end of the removal sleeve 20 is closed by a sealing disk 13, which in turn has a circumferential line of weakness 18.
  • the annular circumferential sealing web 8, which extends from the top plate 3 downwards or inwards, serves as a sealing plug and engages with the inner wall of a container neck, onto which the screw cap is screwed on using the thread 2.
  • the head plate 3 has an axially recessed section with an edge surface 5 which surrounds the central opening of the head plate 3.
  • the flange edge 16 of the removal sleeve 20 is arranged in the recess 6 of the head plate formed thereby, the flange edge 16 and the edge surface 5 being firmly and tightly welded to one another.
  • the flange 16 completely fills the corresponding recess 6, which is formed by an axially recessed, annular section of the head plate 3.
  • Figure 2b is a top plan view of the assembled closure.
  • the corrugation 21, 21 'on the outside of the outer casing 1 the top plate 3, the flange 16, which is received in a recess in the top plate 3 and the sealing disk 13 at the bottom of the removal sleeve 20, this sealing disk in a small angular range and near the outer edge of the sealing disk 13 has an elevation 15, the function of which will be described in more detail later.
  • a sonotrode is brought into engagement with the flange edge and / or the edge surface 5 in each case from opposite sides, as a result of which the energy direction transmitters 17, in particular their apex regions, are heated and melted and produce a continuous, firm welded connection to the edge surface 5.
  • the energy direction indicators and all adjacent elements are the same how the recess 6 designed so that after welding the outside of the flange 16 is flush with the top of the head plate 3, as you can see in Figure 2a can recognize.
  • the elevation or the projection 15 of the sealing disk 13 is limited to a relatively small angular range, as can be seen in particular in FIG Figure 4a can see well.
  • the purpose of this survey 15 is set out below with reference to the Figures 5 and 6 described.
  • Figure 5 shows again the closure 100 according to the invention with a removal nozzle 30 screwed into the opening 14 or the thread 12.
  • Figure 6 shows the closure with screwed removal nozzle in a partial sectional view.
  • the weakening line could also be interrupted in this area, so that there remains a stronger connection between the sealing disk 13 and the inner jacket 11. If, on the other hand, an end stop is provided for the threaded connector 32, an interruption of the weakening line 18 is not necessary in order to prevent the sealing disk 13 from being completely separated from the removal sleeve.
  • the removal sleeve 30 also has a valve 33 and a removal pin 34.
  • a corresponding welded connection between the flange edge 16 and the edge surface 5 is sufficiently firm to absorb relatively large torques, such as occur particularly when the end face of the threaded pin 32 engages with the elevation 15 when the removal connector 30 is screwed in occurs.
  • the line of weakness 18 initially provides significant resistance to attempting to tear it in this area contrary, which can be overcome by applying an appropriate torque and due to the thread translation.
  • the corresponding torque must be absorbed by the welded connection between the flange edge 16 and the edge surface 5.
  • the locking ring 7 serves to make visible the opening of a corresponding container, on which the closure 100 is screwed, because this makes the easily breakable connections between the guarantee ring 7 and the lower edge of the screw cap visible.
  • the outer shape of the entire closure 100 with an outer jacket with an internal thread and an inner jacket with an internal thread, which comprises a removal opening, is known in principle.
  • Such closures have conventionally been injection molded in one piece with a correspondingly complex molding tool.
  • the separate production of the two closure parts 10 and 20, however, enables production with much simpler tools, such as are already available at least in part, which may still need one or the other additional part in order to produce the specifically desired shape, and therefore one can Complex molding tool can be dispensed with if instead the two closure parts 10 and 20 are manufactured separately and then aligned and welded to one another, as described above.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)

Description

Die vorliegende Erfindung betrifft einen Schraubverschluss aus Kunststoff für Großbehälter, mit einem zylindrischen Außenmantel mit einem ersten Innengewinde größeren Durchmessers und einer den Außenmantel an einem axialen Ende teilweise verschließenden Kopfplatte, wobei die Kopfplatte eine Öffnung aufweist, die ihrerseits eine Entnahmehülse mit einem in das Innere des Außenmantels ragenden, in etwa zylindrischen Innenmantel mit einem zweiten Innengewinde kleineren Durchmessers aufnimmt, wobei die Kopfplatte und die Entnahmehülse fest miteinander verbunden sind.The present invention relates to a screw cap made of plastic for large containers, with a cylindrical outer jacket with a first internal thread of larger diameter and a head plate partially closing the outer jacket at an axial end, the head plate having an opening which in turn has a removal sleeve with a inside the Receiving outer jacket projecting, approximately cylindrical inner jacket with a second internal thread of smaller diameter, the top plate and the removal sleeve are firmly connected.

Dabei dient die Entnahmehülse der Aufnahme und Fixierung eines Entnahmestutzens. Typischerweise werden solche Verschlüsse verwendet an Großbehältern, die ein Volumen von mindestens 3 l und häufig auch ein Volumen von 20 l und mehr aufweisen. Bekannt sind entsprechende Behälter beispielsweise als "5 Gallonen-Behälter" für die Aufnahme (und Abgabe) von Trinkwasser.The extraction sleeve serves to receive and fix an extraction nozzle. Such closures are typically used on large containers which have a volume of at least 3 l and often also a volume of 20 l and more. Corresponding containers are known, for example, as "5 gallon containers" for receiving (and dispensing) drinking water.

Solche Behälter weisen einen Behälterhals bzw. Öffnungsstutzen mit einem Außengewinde auf, auf welchen der Außenmantel des Verschlusses, der ein hierzu passendes Innengewinde hat, aufgeschraubt wird. Solche Schraubkappen haben typischerweise Durchmesser im Bereich von 50 bis 70 mm. Bei einem weit verbreiteten Typ entsprechender Schraubverschlüsse und entsprechende einer Ausführungsform der vorliegenden Erfindung hat das Gewinde des Außenmantels einen Nenndurchmesser von ca. 55 mmm und der maximale Außendurchmesser beträgt etwa 70 mm.Such containers have a container neck or opening socket with an external thread, onto which the outer jacket of the closure, which has a matching internal thread, is screwed. Such screw caps typically have diameters in the range from 50 to 70 mm. In the case of a widespread type of corresponding screw caps and an embodiment of the present invention, the thread of the outer jacket has a nominal diameter of approximately 55 mm and the maximum outer diameter is approximately 70 mm.

Um jedoch Flüssigkeit, insbesondere Trinkwasser, aus dem Behälter entnehmen zu können, wird im Allgemeinen nicht diese Schraubkappe mit dem größeren Durchmesser gelöst, sondern die Entnahme erfolgt vielmehr über eine Entnahmehülse, die in der der Öffnung der Kopfplatte des Schraubverschlusses mit größerem Durchmesser angeordnet ist. Die Entnahmehülse weist ihrerseits ein Innengewinde auf, in welches ein Entnahmestutzen eingeschraubt werden kann. Der Innenquerschnitt der Entnahmehülse ist durch eine Siegelscheibe verschlossen, die zur Entnahme von Flüssigkeit aus dem Behälter mindestens teilweise geöffnet bzw. entfernt werden muss.However, in order to be able to remove liquid, in particular drinking water, from the container, this screw cap with the larger diameter is generally not loosened, but rather is removed via a removal sleeve which is arranged in the opening of the head plate of the screw cap with a larger diameter. The removal sleeve in turn has an internal thread into which a removal nozzle can be screwed. The inner cross section of the removal sleeve is closed by a sealing disk which has to be opened or removed at least partially in order to remove liquid from the container.

Bei kleineren Behälter könnte die Siegelscheibe kann beispielsweise eine umlaufende Schwächungslinie und eine Ringöse aufweisen, über welche durch Eingriff mit einem Finger die Siegelscheibe entlang der Schwächungslinie aufgerissen und aus der Entnahmehülse entfernt werden könnte. Bei den hier in Rede stehenden größeren Behältern ist die Siegelscheibe im Allgemeinen weniger leicht zu entfernen. Es ist aber beispielsweise möglich, die Siegelscheibe durch Einschrauben eines Entnahmestutzens mindestens teilweise axial und seitlich wegzudrängen. Der Verbraucher schraubt also für die Entnahme von Flüssigkeit aus dem Behälter einen entsprechenden Entnahmestutzen in das (kleinere) Innengewinde der Entnahmehülse ein, so dass der Entnahmestutzen mit seinem inneren (offenen) Ende mit dem Inneren des Behälters in Verbindung steht. Der Entnahmestutzen weist zweckmäßigerweise ein Ventil auf, Der Behälter kann dann zum Beispiel über Kopf (mit dem Schraubverschluss nach unten) angeordnet werden, sodass nach dem Öffnen des Ventils die Flüssigkeit, insbesondere Trinkwasser, allein aufgrund der Schwerkraft aus dem Entnahmestutzen herausläuft.In the case of smaller containers, the sealing disk could, for example, have a circumferential line of weakness and a ring eyelet, via which the sealing disk could be torn open along the line of weakness by engagement with a finger and removed from the removal sleeve. In the larger containers in question, the sealing disk is generally less easy to remove. However, it is possible, for example, to at least partially force the sealing disk axially and laterally by screwing in an extraction nozzle. For the removal of liquid from the container, the consumer therefore screws a corresponding extraction nozzle into the (smaller) internal thread of the extraction sleeve, so that the internal (open) end of the extraction nozzle is connected to the interior of the container. The tapping point expediently has a valve. The container can then be arranged, for example, overhead (with the screw cap pointing downwards), so that after opening the valve, the liquid, in particular drinking water, runs out of the tapping hole solely due to gravity.

Durch diese Konstruktion kann man vermeiden, dass die Schraubkappe mit einem relativ großen Durchmesser gelöst werden muss, wobei außerdem diese Schraubkappe in der Regel durch einen Garantiering an dem Stutzen bzw. der Öffnung des Behälters gesichert ist, der beim Abschrauben der äußeren Schraubkappe von dem Behälterhals von deren Außenmantel abgetrennt wird und dadurch anzeigt, dass die Schraubkappe bereits mindestens einmal geöffnet wurde. Die Schraubkappe mit dem großen Durchmesser und der Behälterhals mit einer entsprechend großen Öffnung dienen vor allem dem schnellen und effizienten Befüllen des Behälters.This construction makes it possible to avoid having to loosen the screw cap with a relatively large diameter, this screw cap also being generally secured by a guarantee ring on the neck or opening of the container, which is obtained when the outer screw cap is unscrewed from the container neck is separated from its outer jacket and thereby indicates that the screw cap has already been opened at least once. The screw cap with the large diameter and the container neck with a correspondingly large opening serve above all to fill the container quickly and efficiently.

Nicht zuletzt wegen der Größe der zugehörigen Behälter sind die Stückzahlen der hierfür benötigten Verschlüsse relativ gering, da auch die Anzahl der entsprechenden Behälter, insbesondere im Vergleich zu Getränkeflaschen für Endverbraucher, relativ gering ist. Gleichzeitig ist die Herstellung entsprechender Verschlüsse in einer Spritzgussform relativ aufwändig und kompliziert, da jeder derartige Verschluss einen einseitig offenen Hohlraum aufweist, wobei die Hohlräume des äußeren Verschlussteils und des inneren Verschlussteils jeweils in entgegengesetzte Richtungen offen sind und teilweise auch Hinterschneidungen aufweisen. Herkömmliche Verschlüsse dieser Art sind dementsprechend in einem einstufigen herkömmlichen Spritzgussverfahren nur schwierig herzustellen und teuer. KR 2014 0006177 offenbart einen Schraubverschluss aus Kunststoff gemäß dem Oberbegriff des Anspruchs 1.Not least because of the size of the associated containers, the number of closures required for this purpose is relatively small, since the number of corresponding containers is also relatively small, in particular in comparison to beverage bottles for end users. At the same time, the production of corresponding closures in an injection mold is relatively complex and complicated, since each closure of this type has a cavity that is open on one side, the cavities of the outer closure part and the inner closure part each being open in opposite directions and in some cases also having undercuts. Accordingly, conventional closures of this type are difficult to manufacture and expensive in a one-stage conventional injection molding process. KR 2014 0006177 discloses a plastic screw cap according to the preamble of claim 1.

US 5,259,534 offenbart ein Außenmantel mit Kopfplatte und eine Entnahmehülse gemäß dem Oberbegriff des Anspruchs 3. US 5,259,534 discloses an outer jacket with a head plate and a removal sleeve according to the preamble of claim 3.

Die vorliegende Erfindung zielt daher darauf ab, Verschlüsse derselben Funktionalität bereitzustellen, die aber einfacher herstellbar sind. Des Weiteren definiert die vorliegende Erfindung auch ein Verfahren gemäß Anspruch 11 zur Herstellung entsprechender Verschlüsse und Verschlussteilen.The present invention therefore aims to provide closures with the same functionality but which are easier to manufacture. Furthermore, the present invention also defines a method according to claim 11 for the production of corresponding closures and closure parts.

Hinsichtlich des Verschlusses selbst wird die der Erfindung zu Grunde liegende Aufgabe dadurch gelöst, dass der Außenmantel mit der Kopfplatte einerseits und die Entnahmehülse mit ihrem Innengewinde andererseits getrennt voneinander durch Spritzguss hergestellt sind, wobei diese beiden Teile zur Bildung des kompletten Schraubverschlusses durch Verschweißen, alternativ durch Verkleben, fest und dicht miteinander verbunden sind.With regard to the closure itself, the object on which the invention is based is achieved in that the outer jacket with the head plate on the one hand and the removal sleeve with its internal thread on the other hand are produced separately from one another by injection molding, these two parts forming the complete screw closure by welding, alternatively by Glue, firmly and tightly connected.

Da die beiden getrennt hergestellten Verschlussteile jeweils für sich nur einseitig offen sind und insofern durch Standardverfahren und -vorrichtungen hergestellt werden können, ist die Herstellung der beiden Verschlussteile jeweils für sich gesehen vergleichsweise einfach, wobei diese Verschlussteile erst nach ihrer Herstellung zu einem einstückigen Verschluss miteinander verbunden werden. Dabei liegt ein besonderer Vorteil dieses Verschlusses und der Art seiner Herstellung darin, dass für die einzelnen Verschlussteile jeweils herkömmliche Spritzgussformen verwendet werden können, die man beispielsweise nur mit einem Zusatzteil auszustatten bzw. zu modifizieren braucht, um je eines der beiden benötigten Verschlussteile herzustellen. Hierdurch kann man die getrennte Herstellung Bereitstellung besonders aufwändiger Spritzgussformen vermeiden. Die Herstellung der erfindungsgemäßen Verschlüsse ist daher deutlich kostengünstiger als das Spritzgießen der kompletten Verschlüsse in einem einzigen Vorgang in einem Formwerkzeug.Since the two separately manufactured closure parts are each only open on one side and can therefore be manufactured by standard methods and devices, the manufacture of the two closure parts is relatively simple in itself, these closure parts only being connected to one another after they have been manufactured become. A particular advantage of this closure and the way it is manufactured is that conventional injection molds can be used for the individual closure parts, which, for example, only need to be equipped or modified with an additional part in order to produce one of the two required closure parts. This makes it possible to avoid the separate production of particularly complex injection molds. The manufacture of the closures according to the invention is therefore significantly less expensive than the injection molding of the complete closures in a single operation in a molding tool.

In einer Ausführungsform weist die Entnahmehülse an ihrem äußeren Ende einen die Hülsenöffnung umfassenden Flanschrand für die Verbindung mit einer die Öffnung der Kopfplatte umgebenden Randfläche auf. Dies ermöglicht ein relativ großflächiges Zusammenschweißen (oder Verkleben) des Flanschrandes mit der jeweils gegenüberliegenden Randfläche, wodurch beide Verschlussteile besonders fest und dicht miteinander verbunden werden.In one embodiment, the removal sleeve has at its outer end a flange edge surrounding the sleeve opening for the connection to an edge surface surrounding the opening of the head plate. This enables the flange edge to be welded together (or glued) over a relatively large area, with the respective opposite edge surface, as a result of which both closure parts are connected to one another in a particularly firm and tight manner.

Um den Schweißvorgang zu beschleunigen und die Schweißnaht qualitativ zu verbessern, können beispielsweise auf der der Kopfplatte zugewandten Seite des Flanschrandes oder aber auf der dem Flanschrand zugewandten Seite der die Öffnung der Kopfplatte umgebenden Randfläche Energierichtungsgeber vorgesehen sein, welche beim Verschweißen mittels Ultraschall schnell aufschmelzen und eine gewünschte feste und dichte Verbindung mit der jeweils gegenüberliegenden Fläche bewirken.In order to accelerate the welding process and to improve the quality of the weld seam, energy direction sensors can be provided, for example, on the side of the flange edge facing the head plate or on the side facing the flange edge of the edge surface surrounding the opening of the head plate, which melt quickly during welding by means of ultrasound and one create the desired tight and tight connection with the opposite surface.

Vorzugsweise sind die Energierichtungsgeber sich axial von der jeweiligen Fläche weg erstreckende und sich in Richtung von der Fläche weg verjüngende Vorsprünge.The energy direction transmitters are preferably projections which extend axially away from the respective surface and taper in the direction away from the surface.

In einer Ausführungsform sind die Energierichtungsgeber im Querschnitt dreieckige Rippen, die auf dem Flanschrand bzw. der Randfläche radial und/oder in Umfangsrichtung verlaufen. Zweckmäßigerweise liegen die Scheitellinien solcher im Querschnitt dreieckiger Rippen in etwa auf einer gemeinsamen Ebene parallel im Abstand zu der Ebene der Randfläche bzw. des Flanschrandes, auf welcher die Rippen angeordnet sind.In one embodiment, the energy direction transmitters are triangular ribs in cross section, which run radially and / or in the circumferential direction on the flange edge or the edge surface. The apex lines of ribs of triangular cross section are expediently located approximately on one common plane parallel at a distance to the plane of the edge surface or the flange edge on which the ribs are arranged.

Die Kopfplatte des Verschlusses weist in einer Ausführungsform auf ihrer Außenseite eine die Öffnung der Kopfplatte umgebende, axial zurückspringende Aussparung auf, die so bemessen ist, dass der Flanschrand der Entnahmehülse bündig darin aufgenommen werden kann. Mit anderen Worten, die axiale Tiefe dieser ringförmigen Aussparung entspricht der axialen Dicke des Flanschrandes und zweckmäßigerweise stimmt auch der Innendurchmesser der Aussparung mit dem Außendurchmesser des Flanschrandes überein, so dass die Kopfplatte außerhalb der Aussparung zusammen mit der Oberfläche des Flanschrandes in einer gemeinsamen Ebene liegen und Flanschrand und Kopfplatte eine gemeinsame, durchgehende ringförmige Fläche bilden, welche die Öffnung der Entnahmehülse umgibt und die Kopfplatte des zusammengesetzten Verschlusses definiert.In one embodiment, the top plate of the closure has, on its outside, an axially recessed recess which surrounds the opening of the top plate and is dimensioned such that the flange edge of the removal sleeve can be received flush therein. In other words, the axial depth of this annular recess corresponds to the axial thickness of the flange edge and expediently the inside diameter of the recess also matches the outside diameter of the flange edge, so that the head plate lies outside the recess together with the surface of the flange edge in a common plane and The flange edge and the top plate form a common, continuous annular surface which surrounds the opening of the removal sleeve and defines the top plate of the assembled closure.

An dem der Öffnung an der Kopfplatte axial entgegengesetzt liegenden Ende der Entnahmehülse weist diese eine mindestens teilweise heraustrennbare Siegelscheibe auf. Eine solche Siegelscheibe hat in einer Ausführungsform zweckmäßigerweise in der Nähe ihres äußeren Randes eine umlaufende oder zumindest weitgehend umlaufende Schwächungslinie, entlang welcher die Siegelscheibe von dem übrigen Teil der Entnahmehülse abgetrennt werden kann. Durch das Abtrennen kann die Siegelscheibe den Querschnitt der Entnahmehülse entweder teilweise oder vollständig freigeben. Zweckmäßig ist eine Ausgestaltung des Verschlusses, bei welcher die Siegelscheibe im Allgemeinen nicht vollständig von der Entnahmehülse abgetrennt wird, sondern auf einer Seite, d. h. innerhalb eine kleinen Umfangswinkelbereiches noch mit der Entnahmehülse verbunden bleibt. Dies verhindert, dass die Siegelscheibe beim Abtrennen in einen Behälter hineinfällt und dadurch irgendwelche Störungen verursacht.At the end of the removal sleeve which is axially opposite the opening on the head plate, the removal sleeve has an at least partially removable sealing disk. In one embodiment, such a sealing disk expediently has a circumferential or at least largely circumferential weakening line in the vicinity of its outer edge, along which the sealing disk can be separated from the remaining part of the removal sleeve. By separating, the sealing disk can either partially or completely release the cross section of the removal sleeve. A design of the closure is expedient, in which the sealing disk is generally not completely separated from the removal sleeve, but on one side, i. H. remains connected to the extraction sleeve within a small circumferential angle range. This prevents the sealing disk from falling into a container when it is cut off and thereby causing any faults.

Die Siegelscheibe muss auch im Bereich der Schwächungslinie noch erheblichen Druck- und Zugkräfte widerstehen, zumal der Verschluss typischerweise für Großbehälter vorgesehen ist und für eine Zulassung zumeist sogenannte UN-Testbedingungen erfüllen muss. Hierzu gehört unter anderem ein Falltest eines gefüllten Behälters mit dem in Richtung Boden ausgerichteten Verschluss, so dass der Behälter auf den Verschluss fällt. Da der gefüllte Behälter beispielsweis eine Masse von 20 kg oder mehr aufweist, wirken bei einem solchen Test große Kräfte auf den Verschluss, denen sowohl die Schweißverbindung zwischen dem ersten und zweiten verschlussteil als auch die Schwächungslinie der Siegelscheibe widerstehen muss. Die zum Aufreißen der Schwächungslinie mindestens aufzuwendende axiale Druckkraft ist daher erheblich und kann typischerweise nicht allein mit einer Ringöse und ohne zusätzliche Hilfsmittel von Hand erfolgen. Das Aufreißen der Schwächungslinie bzw. das teilweise oder vollständige Abtrennen der Siegelscheiben ist deshalb nicht trivial.The sealing disc also has to withstand considerable pressure and tensile forces in the area of the weakening line, especially since the closure is typically intended for large containers and usually has to meet so-called UN test conditions for approval. This includes, among other things, a drop test of a filled container with the closure oriented towards the bottom, so that the container falls onto the closure. Since the filled container has a mass of 20 kg or more, for example, in such a test large forces act on the closure, which both the welded connection between the first and second closure parts and the line of weakness of the sealing disk must withstand. The axial compressive force which is at least to be used to tear open the line of weakness is therefore considerable and can typically not be done by hand alone with an eyelet and without additional aids. Tearing open the line of weakness or partially or completely separating the sealing discs is therefore not trivial.

Das Innengewinde der Entnahmehülse ist für die Aufnahme eines Entnahmestutzens vorgesehen, der typischerweise ein verschließbares Entnahmeventil aufweist. In einer Ausführungsform ist dabei vorgesehen, dass beim Einschrauben des Entnahmestutzens ein Ende dieses Entnahmestutzens mit der Siegelscheibe in Eingriff tritt und diese mindestens teilweise entlang der Schwächungslinie auftrennt und in Richtung des Inneren des Behälters drückt. Ein solcher Entnahmestutzen hat ein hohlzylindrisches Ende mit einem Außengewinde, dessen Stirnseite mit der Siegelscheibe in Eingriff kommt, wenn der Stutzen in die Entnahmehülse eingeschraubt wird. Hierfür muss allerdings ein erhebliches Drehmoment auf den Entnahmestutzen bzw. dessen Gewindezapfen aufgebracht werden. Während der Nenndurchmesser des Innengewindes des Außenmantels typischerweise und in entsprechenden Ausführungsformen zwischen 38 und 60 mm liegt, hat das Innengewinde des Innenmantel dieser Ausführungsformen einen typischen Nenndurchmesser im Bereich von 18 mm bis 30 mm.The internal thread of the extraction sleeve is provided for receiving an extraction nozzle, which typically has a closable extraction valve. In one embodiment, it is provided that when screwing in the extraction nozzle one end of this extraction nozzle engages with the sealing disk and at least partially separates it along the weakening line and presses it towards the inside of the container. Such an extraction nozzle has a hollow cylindrical end with an external thread, the end face of which engages with the sealing disk when the nozzle is screwed into the extraction sleeve. For this, however, a considerable torque must be applied to the tapping nozzle or its threaded pin. While the nominal diameter of the internal thread of the outer jacket is typically and in corresponding embodiments between 38 and 60 mm, the internal thread of the inner jacket of these embodiments has a typical nominal diameter in the range from 18 mm to 30 mm.

Gemäß einer Ausführungsform weist die Siegelscheibe auf ihrer der Außenseite des Verschlusses zugewandten Seite und in der Nähe der Schwächungslinie in einem kleinen Winkelbereich eine Erhebung auf, die beim Einschrauben eines Entnahmestutzens mit der Stirnseite des Entnahmestutzens in Eingriff kommt, bevor andere Abschnitte der Siegelscheibe mit dieser Stirnseite des Entnahmestutzens in Eingriff treten. Dies führt dazu, dass die Schwächungslinie der Siegelscheibe genau in diesem Abschnitt der Siegelscheibe, wo die Erhebung vorgesehen ist, einer konzentrierten Zugbelastung ausgesetzt ist und dort als erstes aufreißt.According to one embodiment, on its side facing the outside of the closure and in the vicinity of the line of weakness in a small angular range, the sealing disk has an elevation which, when screwing in a removal nozzle, comes into engagement with the end face of the removal nozzle before other sections of the sealing disk have this end face of the extraction nozzle. This leads to the fact that the line of weakness of the sealing disk is exposed to a concentrated tensile load in this section of the sealing disk, where the elevation is provided, and tears open there first.

Durch die lokale Begrenzung der von dem Entnahmestutzen ausgeübten Druckkraft beim Einschrauben in das Gewinde der Entnahmehülse ist die zum anfänglichen Aufreißen der Schwächungslinie erforderliche Kraft wesentlich geringer, als wenn die Stirnseite des Entnahmestutzens in einem ringförmigen Bereich entlang der Schwächungslinie entlang eines größeren Umfangswinkelabschnittes gleichzeitig mit der Siegelscheibe in Eingriff treten würde. Die beim Einschrauben des Entnahmestutzens auf die Siegelscheibe ausgeübte Kraft konzentriert sich demnach zunächst ausschließlich auf die Umgebung der Erhebung, wo die Schwächungslinie dann auch zuerst aufreißt, wobei während des weiteren Einschraubens des Entnahmestutzens auch nach und nach die angrenzenden Abschnitte der Schwächungslinie aufreißen, wobei die Kräfte zum weiteren Auftrennen solcher Schwächungslinien nur noch relativ gering sind, nachdem das anfängliche Einreißen bereits erfolgt ist. Eine geringe Steigung des Innengewindes der Entnahmehülse kann ebenfalls zur Verringerung des erforderlichen Drehmomentes beitragen. Dies ist unter anderem deshalb von Vorteil, weil das Drehmoment unter anderem über die Schweißverbindung von dem inneren Verschlussteil auf das äußere Verschlussteil übertragen wird, die bei geringerem Drehmoment weniger belastet wird.Due to the local limitation of the pressure force exerted by the removal nozzle when screwing into the thread of the removal sleeve, the force required for initially tearing open the weakening line is substantially less than if the end face of the extraction nozzle in an annular region along the weakening line along a larger circumferential angle section simultaneously with the sealing disk would engage. The force exerted on the sealing disk when screwing in the removal nozzle therefore initially concentrates exclusively on the area around the elevation, where the line of weakness then also tears open, while as the screwing in of the removal nozzle continues, the adjacent sections of the line of weakness also gradually tear open, whereby the forces for further separation of such weakening lines are only relatively small after the initial tearing has already taken place. A slight increase in the internal thread of the extraction sleeve can also contribute to reducing the required torque. This is advantageous, among other things, because the torque is transmitted, among other things, via the welded connection from the inner closure part to the outer closure part, which is loaded less with a lower torque.

Die Siegelscheibe bzw. deren Schwächungslinie ist zweckmäßigerweise so gestaltet, dass sie auf der der Erhebung diametral gegenüber liegenden Seite mit der Entnahmehülse verbunden bleibt, wenn der Entnahmestutzen vollständig in die Entnahmehülse eingeschraubt ist. Beispielsweise könnte die Ebene der Siegelscheibe (gegenüber einer zur Verschlussachse senkrechten Ebene) leicht verkippt sein, sodass die ebene Stirnseite eines Entnahmestutzens erst unmittelbar vor Erreichen einer axialen Endposition mit dem der Erhebung diametral gegenüber liegenden Abschnitt der Siegelscheibe in Eingriff tritt.The sealing disk or its line of weakness is expediently designed such that it remains connected to the removal sleeve on the side diametrically opposite the elevation when the removal nozzle is completely screwed into the removal sleeve. For example, the plane of the sealing disk (relative to a plane perpendicular to the closure axis) could be tilted slightly, so that the flat end face of an extraction nozzle only comes into engagement with the section of the sealing disk diametrically opposite the elevation just before reaching an axial end position.

Alternativ kann beispielsweise ein vorderer Abschnitt des Entnahmestutzens radial etwas verjüngt sein und über eine Schulter in einen Abschnitt größeren Durchmessers übergehen, während die Entnahmehülse außerhalb der Schwächungslinie der Siegelscheibe noch einen kleinen, radial nach innen vorspringenden Absatz aufweist, auf welchem die Schulter aufsetzt, wenn der Entnahmestutzen so weit wie möglich in die Entnahmehülse eingeschraubt wird.Alternatively, for example, a front section of the removal nozzle can be somewhat tapered radially and pass over a shoulder into a section of larger diameter, while the removal sleeve has a small, radially inwardly projecting shoulder outside the line of weakness of the sealing disc, on which the shoulder rests when the The extraction nozzle is screwed into the extraction sleeve as far as possible.

In einer weiteren Alternative kann der Entnahmestutzen auch eine Schulter außerhalb des Gewindes aufweisen, welche auf dem Flanschrand der Entnahmehülse aufsetzt bevor die Siegelscheibe vollständig von dem Innenmantel der Entnahmehülse abgetrennt ist.In a further alternative, the removal nozzle can also have a shoulder outside the thread, which rests on the flange edge of the removal sleeve before the sealing disk is completely separated from the inner jacket of the removal sleeve.

Der Entnahmestutzen und dessen Ausgestaltung als solcher sind nicht Teil der vorliegenden Erfindung, jedoch ist insbesondere die Entnahmehülse so ausgelegt, dass sie in der beschriebenen Weise mit dem Entnahmestutzen in dichtem Eingriff steht, wenn der Entnahmestutzen in die Entnahmehülse eingeschraubt ist und die Siegelscheibe mindestens teilweise in das Innere des Behälters gedrückt hat.The extraction nozzle and its design as such are not part of the present invention, but in particular the extraction sleeve is designed such that it is in tight engagement with the extraction nozzle in the manner described when the extraction nozzle is screwed into the extraction sleeve and the sealing disk is at least partially in pressed the inside of the container.

Das Innengewinde der Entnahmehülse hat eine Steigung von höchstens 3 mm, vorzugsweise höchstens 2 mm auf 360°, was im Falle von Kunststoffverschlüssen und bei einem typischen Durchmesser von etwa 25 mm als Feingewinde anzusehen ist. Die Mindeststeigung eines solchen Gewindes liegt zweckmäßigerweise bei 1 mm auf 360°.The internal thread of the removal sleeve has a pitch of at most 3 mm, preferably at most 2 mm at 360 °, which in the case of plastic closures and with a typical diameter of about 25 mm can be regarded as a fine thread. The minimum pitch of such a thread is expediently 1 mm at 360 °.

Die vorliegende Erfindung betrifft darüber hinaus auch die beiden Einzelteile, aus welchen der erfindungsgemäße Verschluss letztlich hergestellt ist. Dabei weist der erste Teil eines solchen aus zwei zusammengesetzten, dicht verbundenen Teilen bestehenden Verschlusses einen zylindrischen Außenmantel mit einem ersten Innengewinde größeren Durchmessers und einer den Außenmantel an einem axialen Ende verschließenden Kopfplatte, wobei die Kopfplatte eine Öffnung aufweist und wobei ein ringförmiger Bereich um die Öffnung axial zurückspringend ausgebildet ist. Darüber hinaus kann ein solcher erster Teil eines Verschlusses auch noch eine sich von der Kopfplatte im Wesentlichen axial erstreckende, ringförmig umlaufende Dichtung innerhalb des Verschlussgewindes aufweisen, die mit der Innenfläche eines Behälterhalses in dichtenden Eingriff treten kann, auf welchen das äußere Verschlussteil aufgeschraubt wird.The present invention also relates to the two individual parts from which the closure according to the invention is ultimately manufactured. The first part of such a closure, which consists of two assembled, tightly connected parts, has a cylindrical outer jacket with a first internal thread of larger diameter and a head plate which closes the outer jacket at an axial end, the head plate having an opening and an annular area around the opening is axially recessed. In addition, such a first part of a closure can also protrude from the top plate have essentially axially extending, annular circumferential seal within the closure thread, which can come into sealing engagement with the inner surface of a container neck onto which the outer closure part is screwed.

Der zweite Teil eines solchen Verschlusses hat die Form einer durch einen Boden an einem axialen Ende einseitig geschlossenen Hülse mit einem zylindrischen Innenmantel mit Innengewinde und einen eine axiale Öffnung der Hülse umfassenden Flanschrand, wobei der Boden nahe seines äußeren Umfanges eine umlaufende Schwächungslinie und auf einer Seite eine nach außen, d.h. zu der Öffnung der Hülse hin, zugewandte Erhebung nahe der Schwächungslinie, die gegenüber den übrigen Bereichen nahe der Schwächungslinie axial hervorsteht, aufweist.The second part of such a closure is in the form of a sleeve which is closed on one side by a base at one axial end and has a cylindrical inner jacket with an internal thread and a flange edge which comprises an axial opening of the sleeve, the base near its outer circumference having a circumferential line of weakness and on one side one to the outside, ie towards the opening of the sleeve, facing elevation near the line of weakness, which axially protrudes from the other areas near the line of weakness.

Die Begriffe "Außenmantel" und "Innenmantel" werden hier zur Unterscheidung der beiden zylindrische Mäntel des Verschlusses verwendet, die jeweils ein Innengewinde tragen und von denen bei dem fertigen Verschluss der eine den äußeren Mantel des gesamten Verschlusses und der andere einen die zentrale Entnahmeöffnung umgebenden Mantel definiert.The terms "outer jacket" and "inner jacket" are used here to distinguish between the two cylindrical jackets of the closure, each of which has an internal thread and of which in the finished closure one surrounds the outer jacket of the entire closure and the other a jacket surrounding the central removal opening Are defined.

Jedes der ersten und zweiten Verschlussteile ist mit Hilfe herkömmlicher Formen bzw. Formwerkzeuge, die allenfalls eine leichte Modifikation erfordern, relativ leicht herstellbar, wobei die entsprechenden Formwerkzeuge keine besondere Komplexität aufweisen müssen. Auf jeden Fall sind entsprechende Formwerkzeuge wesentlich weniger kompliziert herzustellen und aufgebaut als ein Formwerkzeug, welches einen aus den ersten und zweiten Verschlussteilen einstückig zusammenhängenden Verschluss unmittelbar herstellen müsste. Es können somit herkömmliche Formwerkzeuge zur Herstellung der beiden Einzelteile verwendet werden, die ansonsten zur Herstellung ähnlicher Verschlusselemente dienen und die nur geringfügig verändert werden müssen, zum Beispiel durch zusätzliche Einsätze, um damit die Teile des Verschlusses der vorliegenden Erfindung herstellen zu können. Dies ist insbesondere im Hinblick auf die relativ geringen Stückzahlen der Verschlüsse von Bedeutung.Each of the first and second closure parts can be produced relatively easily with the aid of conventional molds or molds, which may require slight modification, the corresponding molds not having to be particularly complex. In any case, corresponding shaping tools are much less complicated to manufacture and set up than a shaping tool which would have to produce a closure which is integrally connected from the first and second closure parts. Conventional molds can thus be used to produce the two individual parts, which are otherwise used to produce similar closure elements and which only need to be changed slightly, for example by additional inserts, in order to be able to manufacture the parts of the closure of the present invention. This is particularly important in view of the relatively small number of closures.

Die vorliegende Erfindung betrifft demnach auch ein Verfahren zum Herstellen eines Verschlusses bzw. von Verschlussteilen, wie sie vorstehend beschrieben und definiert wurden. Dabei wird in einem ersten Schritt der erste Verschlussteil, nämlich eine erste größere Schraubkappe, durch Spritzgießen hergestellt, welche einen zylindrischen Kappenmantel mit Innengewinde und eine Kopfplatte aufweist, die ihrerseits eine Öffnung aufweist. In einem getrennten zweiten Schritt wird der zweite Verschlussteil, nämlich eine Entnahmehülse, hergestellt, welche mindestens einen zylindrischen Innenmantel mit einem zweiten Innengewinde aufweist. Der Begriff "Innenmantel" wird hier zur Unterscheidung gegenüber dem als Außenmantel bezeichneten Mantel der äußeren Schraubkappe verwendet. Die zeitliche Reihenfolge der Herstellung der beiden Verschlussteile ist dabei nicht festgelegt. Die Begriffe "erster Schritt" und "zweiter Schritt" dienen nur der Unterscheidung beider Vorgänge. Zwingend ist nur, dass beide Verschlussteile vorliegen, bevor sie miteinander verschweißt werden können.The present invention accordingly also relates to a method for producing a closure or closure parts, as described and defined above. In a first step, the first closure part, namely a first larger screw cap, is produced by injection molding, which has a cylindrical cap jacket with an internal thread and a head plate, which in turn has an opening. In a separate second step, the second closure part, namely a removal sleeve, is produced, which has at least one cylindrical inner jacket with a second internal thread. The term “inner jacket” is used here to distinguish it from the jacket of the outer screw cap referred to as the outer jacket. The chronological order of manufacture of the two closure parts is not specified. The terms "first step" and "second step" only serve to differentiate between the two processes. The only requirement is that both locking parts are in place before they can be welded together.

Die Entnahmehülse ist im Verhältnis zu der Öffnung in der Kopfplatte so bemessen, dass sie in umlaufendem Kontakt mit dieser ausrichtbar ist, wobei die entsprechend ausgerichtete Kopfplatte und die Entnahmehülse miteinander verschweißt werden und danach einstückig zusammenhängen und im Prinzip dieselbe oder zumindest eine ähnliche Konfiguration bilden, wie ein von vornherein einstückig gegossener Verschluss der oben beschriebenen Art.The removal sleeve is dimensioned in relation to the opening in the head plate in such a way that it can be aligned in circumferential contact therewith, the correspondingly aligned head plate and the removal sleeve being welded to one another and then connected in one piece and in principle forming the same or at least a similar configuration, like a one-piece cast closure of the type described above.

Zweckmäßigerweise erreicht man dies über einen umlaufenden Flansch des ersten Verschlussteils, der mit einer die Öffnung des ersten Verschlussteils umgebenden Randfläche verschweißt wird, wobei die Randfläche und der Flanschrand einander in radialer Richtung überlappen.This is expediently achieved via a peripheral flange of the first closure part, which is welded to an edge surface surrounding the opening of the first closure part, the edge surface and the flange edge overlapping one another in the radial direction.

Dies kann insbesondere durch Ultraschall-Reibschweißen geschehen, wobei zweckmäßigerweise sogenannte "Energierichtungsgeber" vorgesehen sind, die so ausgestaltet sind, dass die anfängliche Reibung auf kleine Teilflächen reduziert bzw. konzentriert ist, die sich dadurch sehr schnell erhitzen und aufschmelzen. Zweckmäßigerweise sind die Energierichtungsgeber weitgehend gleichmäßig und in engen Abständen verteilt, so dass das aufgeschmolzene Material schnell eine zusammenhängende, umlaufende Schicht bildet und die beiden Verschlussteile entlang des äußeren Umfangs des zweiten Verschlussteils fest und dicht miteinander verbindet.This can be done in particular by means of ultrasonic friction welding, so-called “energy direction transmitters” being expediently provided, which are designed in such a way that the initial friction is reduced or concentrated on small partial areas, which thereby heat up and melt very quickly. The energy directors are expediently largely uniformly and at narrow intervals, so that the melted material quickly forms a coherent, circumferential layer and firmly and tightly connects the two closure parts along the outer circumference of the second closure part.

Der Flanschrand könnte sowohl von der Innenseite als auch von der Außenseite her an der die Öffnung des ersten Verschlussteils umgebenden Randfläche anliegen, wobei das Anlegen von der Außenseite her bevorzugt ist, wobei die Randfläche insbesondere den Grund einer axial rückspringenden, ringförmigen Aussparung bildet, in welcher der Flanschrand des ersten Verschlussteils aufgenommen wird.The flange edge could rest against the edge surface surrounding the opening of the first closure part both from the inside and from the outside, the application from the outside being preferred, the edge surface in particular forming the base of an axially recessed, annular recess in which the flange edge of the first closure part is picked up.

Weitere Vorteile, Merkmale und Anwendungsmöglichkeiten werden deutlich anhand der folgenden Beschreibung bevorzugter Ausführungsformen und der dazugehörigen Figuren. Es zeigen:

Figur 1
eine perspektivische Außenansicht des aus zwei Teilen bestehenden Verschlusses,
Figur 2a
eine die Verschlussachse enthaltende Schnittansicht durch den Verschluss nach Figur 1,
Figur 2b
eine Draufsicht von oben bzw. außen auf den Verschluss nach Figur 1 und 2a
Figur 3
eine Schnittansicht durch die beiden ersten und den zweiten Verschlussteile in voneinander getrenntem Zustand,
Figur 4a
eine Ansicht von oben auf den zweiten Verschlussteil,
Figur 4b
eine Ansicht von unten auf den zweiten Verschlussteil,
Figur 5
eine perspektivische Ansicht des Verschlusses nach Figur 1 mit einem eingeschraubten Entnahmestutzen und
Figur 6
eine Schnittansicht durch den Verschlussnach Figur 1 mit eingeschraubtem Entnahmestutzen.
Further advantages, features and possible uses will become clear from the following description of preferred embodiments and the associated figures. Show it:
Figure 1
an external perspective view of the closure consisting of two parts,
Figure 2a
a sectional view containing the closure axis through the closure Figure 1 .
Figure 2b
a plan view from above or outside of the closure Figure 1 and 2a
Figure 3
2 shows a sectional view through the two first and the second closure parts in a separated state,
Figure 4a
a view from above of the second closure part,
Figure 4b
a bottom view of the second closure part,
Figure 5
a perspective view of the closure after Figure 1 with a screwed in nozzle and
Figure 6
a sectional view through the closure Figure 1 with screwed extraction nozzle.

Figur 1 zeigt den aus zwei Teilen zusammengeschweißten Verschluss 100 in einer perspektivischen Ansicht schräg von oben und außen. Die Begriffe oben und "außen" beziehen sich in der vorliegenden Beschreibung auf die Ansicht eines Verschlusses, der auf den Behälterhals eines aufrecht stehenden Behälters aufgeschraubt ist. Wenn im Gebrauch der Behälter für die Entnahme von Trinkwasser oder einer anderen Flüssigkeit auf den Kopf gestellt wird, befindet sich der Verschluss entsprechend an der Unterseite des Behälters. Figure 1 shows the closure 100 welded together from two parts in a perspective view obliquely from above and outside. In the present description, the terms above and "outside" refer to the view of a closure which is screwed onto the neck of a container standing upright. If, during use, the container is turned upside down for the removal of drinking water or another liquid, the closure is located at the bottom of the container.

Die folgende Beschreibung eines Ausführungsbeispiels der Erfindung bezieht sich zunächst auf die Figuren 1 bis 4.The following description of an embodiment of the invention initially relates to FIG Figures 1 to 4 ,

Der Verschluss weist einen Außenmantel 1 auf, an dessen unterem Rand ein Garantieband 7 angeordnet ist, das über leicht brechbare Brücken (nicht dargestellt) mit dem Außenmantel 1 verbunden ist. Der Außenmantel 1 weist eine Reihe von Rippen 21, 21a auf, die das Handhaben, insbesondere das Festschrauben und Losschrauben, des Verschlusses auf einem Behälterhals erleichtern sollen.The closure has an outer casing 1, on the lower edge of which a guarantee band 7 is arranged, which is connected to the outer casing 1 via easily breakable bridges (not shown). The outer jacket 1 has a series of ribs 21, 21a which are intended to facilitate handling, in particular screwing and unscrewing, of the closure on a container neck.

Der zweite Verschlussteil 20 weist einen umlaufenden Flanschrand 16 auf, der in einer ringförmigen Aussparung 6 der Kopfplatte 3 bündig aufgenommen ist. Der zweite Verschlussteil 20 bildet eine Entnahmehülse und hat einen Innenmantel 11 mit einem zentralen Durchgang 14 und einem Innengewinde 12. Der Durchgang 14 ist durch eine Siegelscheibe 13 am unteren Ende der Entnahmehülse 20 verschlossen.The second closure part 20 has a circumferential flange edge 16 which is received flush in an annular recess 6 in the head plate 3. The second closure part 20 forms a removal sleeve and has an inner jacket 11 with a central passage 14 and an internal thread 12. The passage 14 is closed by a sealing disk 13 at the lower end of the removal sleeve 20.

In Figur 2a sind die beiden Verschlussteile 10 und 20 im Schnitt zu erkennen. Der äußere, erste Verschlussteil 10 weist, wie bereits erwähnt, einen äußeren Mantel 1 auf, an dem ein Innengewinde 2 angeordnet ist. Außerdem erstreckt sich in etwa senkrecht zu dem Mantel 1 am oberen Ende dieses Mantels eine quer verlaufende Kopfplatte mit einer Öffnung 4 (siehe Figur 3), die sich zweckmäßigerweise konzentrisch zu der Verschlussachse 50 erstreckt. In dieser Öffnung 4, die von einem Rohrstutzen 9 gebildet wird bzw. umfasst ist, ist die Entnahmehülse 20 angeordnet, die ihrerseits den Innenmantel 11 mit dem Innengewinde 12 und am oberen axialen Ende einen umlaufenden Flanschrand 16 aufweist. Das untere Ende der Entnahmehülse 20 ist durch eine Siegelscheibe 13 verschlossen, die wiederum eine umlaufende Schwächungslinie 18 aufweist. Der ringförmig umlaufende Dichtungssteg 8, welcher sich von der Kopfplatte 3 nach unten bzw. innen erstreckt, dient als Verschlussstopfen und tritt mit der Innenwand eines Behälterhalses in Eingriff, auf welchen die Schraubkappe mit Hilfe des Gewindes 2 aufgeschraubt wird.In Figure 2a the two closure parts 10 and 20 can be seen in section. As already mentioned, the outer, first closure part 10 has an outer jacket 1, on which an internal thread 2 is arranged. In addition, a transversely extending head plate with an opening 4 extends approximately perpendicular to the jacket 1 at the upper end of this jacket (see Figure 3 ), which expediently extends concentrically to the closure axis 50. In this opening 4, which is formed or encompassed by a pipe socket 9, the removal sleeve 20 is arranged in turn has the inner jacket 11 with the internal thread 12 and a circumferential flange edge 16 at the upper axial end. The lower end of the removal sleeve 20 is closed by a sealing disk 13, which in turn has a circumferential line of weakness 18. The annular circumferential sealing web 8, which extends from the top plate 3 downwards or inwards, serves as a sealing plug and engages with the inner wall of a container neck, onto which the screw cap is screwed on using the thread 2.

Die Kopfplatte 3 weist einen axial zurückversetzten Abschnitt mit einer Randfläche 5 auf, welche die zentrale Öffnung der Kopfplatte 3 umgibt. In der dadurch gebildeten Aussparung 6 der Kopfplatte ist der Flanschrand 16 der Entnahmehülse 20 angeordnet, wobei der Flanschrand 16 und die Randfläche 5 fest und dicht miteinander verschweißt sind. Der Flanschrand 16 füllt die entsprechende, Aussparung 6, die durch einen axial zurückversetzten, ringförmigen Abschnitt der Kopfplatte 3 gebildet wird, vollständig aus.The head plate 3 has an axially recessed section with an edge surface 5 which surrounds the central opening of the head plate 3. The flange edge 16 of the removal sleeve 20 is arranged in the recess 6 of the head plate formed thereby, the flange edge 16 and the edge surface 5 being firmly and tightly welded to one another. The flange 16 completely fills the corresponding recess 6, which is formed by an axially recessed, annular section of the head plate 3.

Figur 2b ist eine Draufsicht auf den zusammengesetzten Verschluss von oben. Man erkennt insbesondere die Riffelung 21, 21' an der Außenseite des Außenmantels 1, die Kopfplatte 3, den Flanschrand 16, der in einer Aussparung der Kopfplatte 3 aufgenommen ist und die Siegelscheibe 13 am Grund der Entnahmehülse 20, wobei diese Siegelscheibe in einem kleinen Winkelbereich und nahe des äußeren Randes der Siegelscheibe 13 eine Erhebung 15 aufweist, deren Funktion später noch genauer beschrieben wird. Figure 2b is a top plan view of the assembled closure. One can see in particular the corrugation 21, 21 'on the outside of the outer casing 1, the top plate 3, the flange 16, which is received in a recess in the top plate 3 and the sealing disk 13 at the bottom of the removal sleeve 20, this sealing disk in a small angular range and near the outer edge of the sealing disk 13 has an elevation 15, the function of which will be described in more detail later.

Die Details beider Verschlussteile sind nochmals besser in Figur 3 zu erkennen, in welcher der erste Verschlussteil 10 und der zweite Verschlussteil 20 getrennt voneinander dargestellt sind. Die entsprechenden Teile wurden im Zusammenhang mit Figur 2a im Wesentlichen bereits beschrieben.The details of both fastener parts are even better in Figure 3 to recognize in which the first closure part 10 and the second closure part 20 are shown separately from one another. The relevant parts were related to Figure 2a essentially already described.

In Figur 3 erkennt man weiterhin sogenannte "Energierichtungsgeber" 17 an der Unterseite des Flanschrandes 16. Dabei handelt es sich um im Querschnitt dreieckige radiale Rippen oder Stege 17, die man insbesondere auch in Figur 4b gut erkennen kann. Die Scheitellinien dieser im Querschnitt dreieckigen Stege 17 definieren die untere Ebene des Flanschrandes 16. Für das Verschweißen wird der Innenmantel 11 in den Haltestutzen 9 des ersten Verschlussteiles 10 eingesetzt, der sich von dem inneren Rand der Randfläche 5 abwärts bzw. nach innen erstreckt, bis die Scheitellinien der Energierichtungsgeber 17 auf der Randfläche 5 aufliegen. Eine Sonotrode wird mit dem Flanschrand und/oder der Randfläche 5 jeweils von entgegengesetzten Seiten her in Eingriff gebracht, wodurch die Energierichtungsgeber 17, insbesondere deren Scheitelbereiche erhitzt und aufgeschmolzen werden und eine durchgehende, feste Schweißverbindung mit der Randfläche 5 herstellen. Dabei sind die Energierichtungsgeber und alle angrenzenden Elemente ebenso wie die Aussparung 6 so ausgelegt, dass nach dem Verschweißen die Außenseite des Flanschrandes 16 bündig mit der Oberseite der Kopfplatte 3 abschließt, wie man dies in Figur 2a erkennen kann.In Figure 3 One can also recognize so-called "energy direction indicators" 17 on the underside of the flange edge 16. These are radial ribs or webs 17 which are triangular in cross section and which are also shown in Figure 4b can see well. The apex lines of these webs 17, which are triangular in cross-section, define the lower plane of the flange edge 16. For the welding, the inner jacket 11 is inserted into the holding socket 9 of the first closure part 10, which extends downwards or inwards from the inner edge of the edge surface 5 until the apex lines of the energy direction indicators 17 rest on the edge surface 5. A sonotrode is brought into engagement with the flange edge and / or the edge surface 5 in each case from opposite sides, as a result of which the energy direction transmitters 17, in particular their apex regions, are heated and melted and produce a continuous, firm welded connection to the edge surface 5. The energy direction indicators and all adjacent elements are the same how the recess 6 designed so that after welding the outside of the flange 16 is flush with the top of the head plate 3, as you can see in Figure 2a can recognize.

Die Erhebung bzw. der Vorsprung 15 der Siegelscheibe 13 ist auf einen relativ kleinen Winkelbereich beschränkt, wie man insbesondere in Figur 4a gut erkennen kann. Der Zweck dieser Erhebung 15 wird nachstehend unter Bezug auf die Figuren 5 und 6 beschrieben.The elevation or the projection 15 of the sealing disk 13 is limited to a relatively small angular range, as can be seen in particular in FIG Figure 4a can see well. The purpose of this survey 15 is set out below with reference to the Figures 5 and 6 described.

Figur 5 zeigt nochmals den erfindungsgemäßen Verschluss 100 mit einem in die Öffnung 14 bzw. das Gewinde 12 eingeschraubten Entnahmestutzen 30. Figure 5 shows again the closure 100 according to the invention with a removal nozzle 30 screwed into the opening 14 or the thread 12.

Figur 6 zeigt den Verschluss mit eingeschraubtem Entnahmestutzen in einer teilweisen Schnittansicht. Der hohlzylindrische Gewindezapfen 32 tritt beim Einschrauben des Gewindezapfens 32 in das Gewinde 12 des Innenmantels kurz vor Erreichen einer axialen Endposition schließlich mit der Erhebung 15 in Eingriff, wobei das auf den Entnahmestutzen aufgebrachte Drehmoment entsprechend der Gewindesteigung in eine auf die Erhebung 15 wirkende Druckkraft übersetzt wird. Die Übersetzung durch das Gewinde 12 ermöglicht es, eine ausreichende Kraft auf die Erhebung 15 der Siegelscheibe 13 auszuüben, so dass die Schwächungslinie 18, entlang welcher die Siegelscheibe 13 mit dem Innenmantel 11 verbunden ist, im Bereich der Erhebung 15 einreißt. Beim Weiterdrehen des Entnahmezapfens 32 in seine Endstellung wird die Siegelscheibe 13 nach und nach entlang der Schwächungslinie 18 und fast über den gesamten Umfang hinweg abgetrennt, bleibt jedoch in einem kleinen Winkelbereich diametral gegenüberliegend von der Erhebung 15 noch mit dem Innenmantel 11 in Verbindung. Figure 6 shows the closure with screwed removal nozzle in a partial sectional view. When the threaded pin 32 is screwed into the thread 12 of the inner jacket shortly before reaching an axial end position, the hollow cylindrical threaded pin 32 finally engages with the elevation 15, the torque applied to the removal nozzle being translated into a compressive force acting on the elevation 15 in accordance with the thread pitch , The translation by the thread 12 makes it possible to exert a sufficient force on the elevation 15 of the sealing disk 13 so that the line of weakness 18 along which the sealing disk 13 is connected to the inner jacket 11 tears in the area of the elevation 15. When the removal pin 32 is turned further into its end position, the sealing disk 13 is gradually cut off along the weakening line 18 and almost over the entire circumference, but remains in a small angular range opposite the elevation 15 with the inner casing 11 in connection.

Falls gewünscht, könnte die Schwächungslinie in diesem Bereich auch unterbrochen sein, so dass hier eine festere Verbindung zwischen Siegelscheibe 13 und Innenmantel 11 bestehen bleibt. Wenn andererseits ein Endanschlag für den Gewindestutzen 32 bereitgestellt wird, ist eine Unterbrechung der Schwächungslinie 18 nicht erforderlich, um ein vollständiges Abtrennen der Siegelscheibe 13 von der Entnahmehülse zu verhindern.If desired, the weakening line could also be interrupted in this area, so that there remains a stronger connection between the sealing disk 13 and the inner jacket 11. If, on the other hand, an end stop is provided for the threaded connector 32, an interruption of the weakening line 18 is not necessary in order to prevent the sealing disk 13 from being completely separated from the removal sleeve.

Die Entnahmehülse 30 weist außerdem ein Ventil 33 und einen Entnahmezapfen 34 auf.The removal sleeve 30 also has a valve 33 and a removal pin 34.

Es hat sich herausgestellt dass eine entsprechende Schweißverbindung zwischen dem Flanschrand 16 und der Randfläche 5 ist ausreichend fest ist, um relativ große Drehmomente aufzunehmen, wie sie insbesondere dann auftreten, wenn die Stirnseite des Gewindezapfens 32 beim Einschrauben des Entnahmestutzens 30 mit der Erhebung 15 in Eingriff tritt. Die Schwächungslinie 18 setzt dem Versuch, sie in diesem Bereich zu zerreißen, zunächst einen deutlichen Widerstand entgegen, der aber bei Aufbringen eines entsprechenden Drehmomentes und aufgrund der Gewindeübersetzung überwunden werden kann. Das entsprechende Drehmoment muss jedoch durch die Schweißverbindung zwischen dem Flanschrand 16 und der Randfläche 5 aufgenommen werden.It has been found that a corresponding welded connection between the flange edge 16 and the edge surface 5 is sufficiently firm to absorb relatively large torques, such as occur particularly when the end face of the threaded pin 32 engages with the elevation 15 when the removal connector 30 is screwed in occurs. The line of weakness 18 initially provides significant resistance to attempting to tear it in this area contrary, which can be overcome by applying an appropriate torque and due to the thread translation. However, the corresponding torque must be absorbed by the welded connection between the flange edge 16 and the edge surface 5.

Der Sicherungsring 7 dient dazu, ein Öffnen eines entsprechenden Behälters, auf welchem der Verschluss 100 aufgeschraubt ist, sichtbar zu machen, weil dadurch die leicht brechbaren Verbindungen zwischen dem Garantiering 7 und dem unteren Rand der Schraubkappe sichtbar wird.The locking ring 7 serves to make visible the opening of a corresponding container, on which the closure 100 is screwed, because this makes the easily breakable connections between the guarantee ring 7 and the lower edge of the screw cap visible.

Die äußere Form des gesamten Verschlusses 100 mit einem Außenmantel mit Innengewinde und einem Innenmantel mit Innengewinde, welcher eine Entnahmeöffnung umfasst, ist prinzipiell bekannt. Derartige Verschlüsse wurden herkömmlich jedoch mit einem entsprechend komplexen Formwerkzeug in einem Stück spritzgegossen. Die getrennte Herstellung der beiden Verschlussteile 10 und 20 ermöglicht jedoch eine Herstellung mit wesentlich einfacheren Werkzeugen, wie sie zumindest teilweise bereits zur Verfügung stehen, die allenfalls noch das ein oder andere Zusatzteil benötigen, um die konkret gewünschte Form zu erzeugen und man kann daher auf ein komplexes Formwerkzeug verzichten, wenn man stattdessen die beiden Verschlussteile 10 und 20 getrennt herstellt und sie anschließend miteinander ausrichtet und verschweißt, wie dies vorstehend beschrieben wurde.The outer shape of the entire closure 100 with an outer jacket with an internal thread and an inner jacket with an internal thread, which comprises a removal opening, is known in principle. Such closures have conventionally been injection molded in one piece with a correspondingly complex molding tool. The separate production of the two closure parts 10 and 20, however, enables production with much simpler tools, such as are already available at least in part, which may still need one or the other additional part in order to produce the specifically desired shape, and therefore one can Complex molding tool can be dispensed with if instead the two closure parts 10 and 20 are manufactured separately and then aligned and welded to one another, as described above.

Für Zwecke der ursprünglichen Offenbarung wird darauf hingewiesen, dass sämtliche Merkmale, wie sie sich aus der vorliegenden Beschreibung, den Zeichnungen und den abhängigen Ansprüchen für einen Fachmann erschließen, auch wenn sie konkret nur im Zusammenhang mit bestimmten weiteren Merkmalen beschrieben wurden, sowohl einzeln als auch in beliebigen Zusammenstellungen mit anderen der hier offenbarten Merkmale oder Merkmalsgruppen kombinierbar sind, soweit dies nicht ausdrücklich ausgeschlossen wurde oder technische Gegebenheiten derartige Kombinationen unmöglich oder sinnlos machen. Die Erfindung wird jedoch durch die beigefügten Ansprüche definiert. Auf die umfassende, explizite Darstellung sämtlicher denkbarer Merkmalskombinationen und die Betonung der Unabhängigkeit der einzelnen Merkmale voneinander wird hier nur der Kürze und der Lesbarkeit der Beschreibung wegen verzichtet. For the purposes of the original disclosure, it is pointed out that all of the features that are apparent to a person skilled in the art from the present description, the drawings and the dependent claims, even if they have only been described concretely in connection with certain further features, both individually and can be combined in any combination with other of the features or groups of features disclosed here, unless this has not been expressly excluded or technical circumstances make such combinations impossible or senseless. However, the invention is defined by the appended claims. The comprehensive, explicit representation of all conceivable combinations of features and the emphasis on the independence of the individual features from one another are omitted here only for the sake of brevity and legibility of the description.

Claims (13)

  1. A screw closure (100) of plastic for large containers, comprising a cylindrical outer shell (1) having a first female thread (2) of larger diameter and a head plate (3) which partially closes the outer shell (1) at an axial end, wherein the head plate (3) has an opening (4) which in turn accommodates a removal sleeve (20) having an approximately cylindrical inner shell (11) which projects into the interior of the outer shell, wherein the head plate (3) and the removal sleeve (20) are integrally connected together, characterised in that the inner shell (11) has a second female thread (12) of smaller diameter, the outer shell
    (1) with head plate (3) on the one hand and the removal sleeve (20) with female thread
    (2) on the other hand are produced separately from each other by injection moulding and are fixedly and tightly connected together by welding or gluing to form the complete screw closure (100).
  2. A screw closure (100) according to claim 1 characterised in that the removal sleeve (20) at its outer end has a flange edge (16) surrounding the sleeve opening (14) for connection to an edge surface (5) surrounding the opening (4) of the head plate (3).
  3. An outer shell (1) with head plate (3) on the one hand and removal sleeve (20), separate from each other, characterised in that they are suitable for producing the screw closure according to claim 2, wherein provided on the side of the flange edge (16) that is towards the head plate (3) and/or on the side towards the flange edge (16) of the edge surface (5) surrounding the opening (4) of the head plate (3) are energy direction means (17) which in the welding operation using ultrasound quickly melt and can provide a desired fixed and sealed connection to the respectively opposite surface.
  4. The outer shell (1) with head plate (3) and the removal sleeve (20) according to claim 3, characterised in that the energy direction means (17) provided on the flange edge (16) or the edge surface (5) are projections which extend axially from the respective surface and narrow away from the surface.
  5. The outer shell (1) with head plate (3) and the removal sleeve (20) according to claim 4, characterised in that the energy direction means are ribs (17) of triangular cross-section which extend radially and/or in the peripheral direction.
  6. A screw closure (100) or outer shell (1) with head plate (3) and removal sleeve (20) according to one of the preceding claims characterised in that the head plate (3) on its outside has an annular recess (6) which surrounds the opening (4) and is set back axially and the dimensions of which are designed for flush accommodation of a flange edge (16) of the removal sleeve (20).
  7. A screw closure (100) according to claim 1 characterised in that at its inner end the removal sleeve (20) has a sealing disc (13) which can be at least partially separated out.
  8. A screw closure (100) according to claim 7 characterised in that the sealing disc (13) has a peripherally extending weakening line (18) near its outer edge.
  9. A screw closure (100) according to claim 8 characterised in that provided in a limited peripheral angular region on the sealing disc (13) and near the peripherally extending weakening line (18) is an axially outwardly projecting local raised portion (15) for engagement with a removal spout (30) which is to be screwed into the female thread (12).
  10. A screw closure (100) or outer shell (1) with head plate (3) and removal sleeve (20) according to one of the preceding claims characterised in that the female thread (12) of the removal sleeve (20) has a pitch of at most 3 mm, preferably at most 2 mm over 360°.
  11. A process for producing a screw closure (100) according to one of claims 1, 2 and 6-10, wherein in a first step a first larger screw cap is produced by injection moulding, which has a cylindrical cap shell (1) having a female thread and a head plate (3) which in turn has an opening (4), wherein in a second separate step a removal sleeve (20) is produced, which has at least one cylindrical inner shell having a second female thread, wherein the removal sleeve (20) in comparison with the opening (4) of the head plate(3) is of such a size that it is oriented and can be oriented in peripheral contact therewith, and the head plate (3) is welded to the removal sleeve (20).
  12. A process according to claim 11 characterised in that the removal sleeve (20) and the head plate (3) are welded together by ultrasound friction welding.
  13. A process according to claim 11 or 12 for producing a screw closure (100) according to one of claims 2 and 6 characterised in that on the outside or inside the flange edge (16) bears against the region of the head plate (3) surrounding the opening (4), wherein in a third step the flange edge (16) is welded to the region surrounding the opening (4) in the head plate (3).
EP17717426.5A 2016-04-25 2017-04-13 Screw cap for large containers Active EP3448770B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016107596.5A DE102016107596A1 (en) 2016-04-25 2016-04-25 Screw cap for large containers
PCT/EP2017/058965 WO2017186513A1 (en) 2016-04-25 2017-04-13 Screw cap for large containers

Publications (2)

Publication Number Publication Date
EP3448770A1 EP3448770A1 (en) 2019-03-06
EP3448770B1 true EP3448770B1 (en) 2020-02-12

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EP17717426.5A Active EP3448770B1 (en) 2016-04-25 2017-04-13 Screw cap for large containers

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US (1) US10640267B2 (en)
EP (1) EP3448770B1 (en)
BR (1) BR112018070822A2 (en)
DE (1) DE102016107596A1 (en)
WO (1) WO2017186513A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016107596A1 (en) 2016-04-25 2017-10-26 Bericap Gmbh & Co. Kg Screw cap for large containers
JP7311375B2 (en) * 2019-09-27 2023-07-19 株式会社吉野工業所 bottle mouth cap

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5259534A (en) * 1992-08-28 1993-11-09 National Packaging Container cap with removable insert

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3917038A1 (en) 1989-05-25 1990-12-06 Wero Medical Werner Michallik Keeping liq. sterile in container - involves wafer closure piece inside screw lid in which pin is fitted
CN2240500Y (en) 1995-01-19 1996-11-20 珠海市中富工业集团公司 Novel plastic water-drinking bottle cover
AU1157901A (en) * 2000-11-02 2002-05-15 Spreckelsen Mcgeough Ltd Resealable gas impermeable sealing assembly
DE102005055036A1 (en) 2005-11-16 2007-05-24 Bericap Gmbh & Co. Kg Closure for container opening, has membrane seal whereby diameter and thickness of annular circumferential bar is determined in such manner that bar comes in sealing engagement with both surrounding sides of rupture line
FR3004379B1 (en) * 2013-04-15 2015-09-04 Tetra Laval Holdings & Finance METHOD FOR MANUFACTURING A CLOSURE CAP FOR THE CLIPS OF A CONTAINER, METHOD FOR CLOSING A CONTAINER BY A CAP PRODUCED ACCORDING TO SUCH A METHOD AND CAPS MADE BY SUCH A METHOD
KR20140006177U (en) 2013-05-30 2014-12-10 대상 주식회사 Closure cap for receptacles for receiving medical liquids
DE102016107596A1 (en) 2016-04-25 2017-10-26 Bericap Gmbh & Co. Kg Screw cap for large containers

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5259534A (en) * 1992-08-28 1993-11-09 National Packaging Container cap with removable insert

Also Published As

Publication number Publication date
BR112018070822A2 (en) 2019-02-05
EP3448770A1 (en) 2019-03-06
US20190077553A1 (en) 2019-03-14
DE102016107596A1 (en) 2017-10-26
US10640267B2 (en) 2020-05-05
WO2017186513A1 (en) 2017-11-02

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