EP0371920A2 - Screw cap with a tamper-evident band - Google Patents

Screw cap with a tamper-evident band Download PDF

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Publication number
EP0371920A2
EP0371920A2 EP89810883A EP89810883A EP0371920A2 EP 0371920 A2 EP0371920 A2 EP 0371920A2 EP 89810883 A EP89810883 A EP 89810883A EP 89810883 A EP89810883 A EP 89810883A EP 0371920 A2 EP0371920 A2 EP 0371920A2
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EP
European Patent Office
Prior art keywords
cap
section
screw cap
cap according
guarantee band
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.)
Granted
Application number
EP89810883A
Other languages
German (de)
French (fr)
Other versions
EP0371920B1 (en
EP0371920A3 (en
Inventor
Werner R. F. Stibal
Franz Thomas Bartl
Hans-Werner Breuer
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.)
Crown Cork AG
Original Assignee
Crown Cork AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Crown Cork AG filed Critical Crown Cork AG
Priority to AT89810883T priority Critical patent/ATE91264T1/en
Publication of EP0371920A2 publication Critical patent/EP0371920A2/en
Publication of EP0371920A3 publication Critical patent/EP0371920A3/en
Application granted granted Critical
Publication of EP0371920B1 publication Critical patent/EP0371920B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS 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
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
    • B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
    • B65D41/3423—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS 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
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
    • B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
    • B65D41/3442—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with rigid bead or projections formed on the tamper element and coacting with bead or projections on the container
    • B65D41/3447—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with rigid bead or projections formed on the tamper element and coacting with bead or projections on the container the tamper element being integrally connected to the closure by means of bridges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS 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
    • B65D2401/00—Tamper-indicating means
    • B65D2401/15—Tearable part of the closure
    • B65D2401/30—Tamper-ring remaining connected to closure after initial removal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS 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
    • B65D2401/00—Tamper-indicating means
    • B65D2401/15—Tearable part of the closure
    • B65D2401/35—Vertical or axial lines of weakness

Definitions

  • the invention relates to a screw cap made of plastic material for closing a container mouth according to the preamble of claim 1.
  • Such screw caps have a guarantee function in that a first removal of the cap is indicated by tearing off the guarantee band.
  • Screw caps with mechanically locking guarantee bands have been known and used for a long time.
  • the guarantee band is divided into two separate, semicircular parts, both of which have grown over reinforced webs at the lower edge of the cap.
  • this two-part design involves the risk that the two parts receive too great a circumferential elasticity, so that the cap can be unscrewed without tearing off the band.
  • the guarantee band is divided into two arcuate sections which are separated from one another by a vertical slot and by a vertical predetermined breaking point. There is also a tearing of the vertical predetermined breaking point not guaranteed in every case, so that the user may have to manipulate by hand in order to bring about a complete loosening of the band.
  • the tear-off resistance between the cap and the band is increased to a fraction of the circumference and the band is weakened by an oblique predetermined tear line.
  • the guarantee band can be integrally and firmly connected to the lower edge of the cap over a relatively large circumferential section, this section having only a support and retention function and allowing the cap to be placed symmetrically on the bottle, but does not actually perform a guarantee function.
  • the guarantee function is exercised by the complementary section, which is not or only tearably connected to the lower edge of the cap. This section can be made relatively short, so that when the container mouth is later re-closed, the there is that the torn guarantee tape is pushed between the threads.
  • the guarantee band is continuously formed over its entire circumference, which means that the necessary circumferential tension is achieved when it is opened for the first time. This ensures that the predetermined breaking point tears on the guarantee tape.
  • the firmly connected section of the guarantee band extends particularly advantageously over an angle of more than 90 ° and less than 270 °, preferably from 120 ° to 260 °.
  • the complementary section of the guarantee tape which is not firmly connected to the cap, can be connected to the lower edge of the cap via tear-off webs. However, two webs can be sufficient to hold the complementary section in place.
  • the retaining elements are preferably arranged on the separately formed complementary section of the guarantee band, but can also extend at least partially over the firmly connected section.
  • the retaining elements can be designed as deformable tongues, e.g. according to applicant's EP-A-281 514.
  • the retaining elements can also be designed as individual beads, as shown in US-A-4,305,516 or in US-A-4,744,479. It would even be conceivable that the only retaining element is a circumferential or almost circumferential inner bead on the guarantee band.
  • a material recess is arranged next to the predetermined breaking point on the guarantee band.
  • This material recess can be designed, for example, as a vertical slot which extends over part of the guarantee band. Instead of a slot, however, only one notch could also be arranged in the guarantee band.
  • the material recess takes material expansion open when screwing on for the first time and thus relieves the predetermined breaking point.
  • At least one inwardly directed support lug is arranged on the lower cap edge in the region of the detachable complementary section.
  • This support lug prevents the complementary section of the guarantee band, which is connected to the edge of the cap only by a few webs, from being pushed into the cap opening when it is first put on.
  • the upper edge of the guarantee band is rather supported on the nose, so that the tear-off bars are prevented from tearing when the cap is put on.
  • Figure 1 shows a screw cap 1 made of plastic material with an internal thread 5, which is intended to close a container mouth 2 with an external thread 6.
  • Such screw caps are preferred for closing Bottles with soft drinks are used, which are usually reusable glass bottles with a standardized bottle mouth.
  • the guarantee band 3 consists of a circumferential section 9 which is firmly connected to the lower edge of the cap and of a complementary section 10 which can be torn off or not firmly connected 2 and when unscrewing the cap for the first time, cause the necessary tensile force to tear the guarantee tape.
  • the cross section of the screw cap can be seen from FIGS. 2 to 4.
  • the screw cap 1 itself can have an orifice seal 16 or another sealing system such as e.g. have an inserted sealing washer.
  • the cross-sectional shape of the screw cap and the guarantee strip is selected such that it can be manufactured in an axially opening injection molding tool.
  • FIG. 5 shows the length of the peripheral section 9 firmly connected to the lower edge 15. In the exemplary embodiment, this extends over an angle alpha of approximately 240 °.
  • This section as can be seen from FIG. 2 on the right side, is connected to the lower edge 15 practically in its entire wall thickness and therefore cannot be torn off.
  • the complementary section 10 which is not firmly connected to the lower edge of the cap, accordingly extends over an angle Beta of approximately 120 °.
  • the cross-sectional shape of the guarantee band in this section can be seen from FIG. 2, left side.
  • the guarantee tape is approximately wedge-shaped at the top and connected to only two tear-off webs 12 and 12 'with the lower edge of the cap.
  • Inwardly directed tongues 7 serve as retaining elements, under each of which a support bead 8 is arranged.
  • the tongues 7 are bent upwards and thus slide over the bead 4 at the bottle mouth. Bending of the tongues 7 downward is prevented by the support beads 8, so that the retaining elements once engaged under the bead 4 can no longer be pushed over the bead without tearing the guarantee band 3.
  • a predetermined breaking point 11 is arranged on the guarantee band.
  • this consists of a horizontal web 17 which connects the fixed section 9 and the loose complementary section 10 to one another.
  • a material recess 13 in the form of a slot is provided directly next to the section 9. This slot extends only about half of the guarantee bandwidth, so that there is no complete interruption of the guarantee band. Instead of the slot, it would also be possible to arrange only one notch with which the wall thickness of the guarantee tape is greatly reduced. The material recess 13 relieves the predetermined breaking point 11 without significantly reducing the disproportionately large expansion forces when unscrewing for the first time.
  • FIG. 3 also shows the support lug 14, which is arranged on the inside of the cap in the region of the loose complementary section 10.
  • This support nose which is inclined slightly obliquely downwards, prevents the loose complementary section 10 from being able to slide into the cap opening when the cap is screwed on for the first time.
  • the tear-off webs 12 and 12 ' are relieved.
  • FIG. 3 shows the arrangement of the retaining elements 7, which extend over an angle delta of approximately 180 °.
  • Three of the retaining elements lie on the loose complementary section 10, while two of the retaining elements 7 'are already arranged on the fixed peripheral section 9.
  • the first of the retaining elements lies approximately diametrically opposite the predetermined breaking point 11.
  • the two tear-off webs 12 and 12 ' lie within an angle gamma of less than 90 °, starting from the predetermined breaking point 11.
  • the number of retaining elements 7, the tear-off webs 12 and the angle of the individual sections can obviously be adapted to the respective circumstances. In certain cases it would also be conceivable to provide more than one predetermined breaking point 11 on the guarantee band.
  • the cross-sectional shape of the guarantee band can also be adapted to the individual case.

Abstract

The screw cap (1) is provided with a tamper-evident band (3) which is subdivided into two sections. A circumferential section (9) is connected firmly to the lower cap-edge while a complementary section (10) is designed to be tear-off and is connected to the lower cap-edge only via tear-off tabs (12). At one end of the fixed circumferential section (9) a predetermined breaking point (11) with an elastic slotted element is arranged on the tamper-evident band (3). <IMAGE>

Description

Die Erfindung betrifft eine Schraubkappe aus Kunststoffmate­rial zum Verschliessen einer Behältermündung gemäss dem Ober­begriff von Anspruch 1. Derartige Schraubkappen haben eine Garantiefunktion, indem ein erstmaliges Entfernen der Kappe durch ein Abreissen des Garantiebandes angezeigt wird. Schraubkappen mit mechanisch einrastenden Garantiebändern sind bereits seit längerer Zeit bekannt und gebräuchlich.The invention relates to a screw cap made of plastic material for closing a container mouth according to the preamble of claim 1. Such screw caps have a guarantee function in that a first removal of the cap is indicated by tearing off the guarantee band. Screw caps with mechanically locking guarantee bands have been known and used for a long time.

Ein Problem bei den bekannten Kappen besteht insbesondere darin, dass das Garantieband so ausgebildet wird, dass es beim erstmaligen Oeffnen an der richtigen Stelle reisst, dass es aber beim späteren Wiederverschliessen der Behältermündung den Verschliessvorgang nicht stört. Bei Mehrwegbehältern ist ein Verbleiben des Garantiebandes an der Flaschenmündung unerwünscht, so dass das Garantieband an wenigstens einer Stelle fest mit dem unteren Kappenrand verbunden sein muss. Gattungsmässig vergleichbare Schraubkappen sind beispiels­weise durch die US-A-4,305,516 oder die US-A-4,744,479 be­kannt geworden.A problem with the known caps is, in particular, that the guarantee band is designed in such a way that it tears at the right place when it is opened for the first time, but that it does not interfere with the closing process when the container mouth is subsequently closed again. In the case of reusable containers, it is undesirable for the guarantee band to remain at the bottle mouth, so that the guarantee band must be firmly connected to the lower edge of the cap at least at one point. Screw caps of the generic type are known, for example, from US Pat. No. 4,305,516 or US Pat. No. 4,744,479.

Bei der US-A-4,305,516 ist das Garantieband in zwei separate, halbkreisförmige Teile unterteilt, welche beide über ver­stärkte Stege am unteren Kappenrand angewachsen sind. Diese zweiteilige Ausgestaltung birgt jedoch die Gefahr in sich, dass die beiden Teile eine zu grosse Umfangselastizität er­halten, so dass die Kappe ohne Abreissen des Bandes abge­schraubt werden kann. Bei der Kappe gemäss US-A-4,744,479 ist das Garantieband zwar in zwei bogenförmige Abschnitte unter­teilt, die durch einen vertikalen Schlitz und durch eine vertikale Sollbruchstelle voneinander getrennt sind. Ein Reissen der vertikalen Sollbruchstelle ist aber auch hier nicht in jedem Fall gewährleistet, so dass der Benutzer even­tuell von Hand manipulieren muss, um ein vollständiges Lösen des Bandes herbeizuführen.In US-A-4,305,516, the guarantee band is divided into two separate, semicircular parts, both of which have grown over reinforced webs at the lower edge of the cap. However, this two-part design involves the risk that the two parts receive too great a circumferential elasticity, so that the cap can be unscrewed without tearing off the band. In the cap according to US-A-4,744,479, the guarantee band is divided into two arcuate sections which are separated from one another by a vertical slot and by a vertical predetermined breaking point. There is also a tearing of the vertical predetermined breaking point not guaranteed in every case, so that the user may have to manipulate by hand in order to bring about a complete loosening of the band.

Gemäss der DE-A-24 39 414 ist der Abreisswiderstand zwischen Kappe und Band auf einen Bruchteil des Umfangs erhöht und das Band ist durch eine schräg verlaufende Sollreisslinie ge­schwächt. Bei dieser Ausführung besteht aber ebenfalls die Gefahr, dass das ganze Garantieband unter dem Flaschenwulst verbleibt, wenn der Reisswiderstand des Bandes grösser ist als die Verbindung zur Kappe.According to DE-A-24 39 414, the tear-off resistance between the cap and the band is increased to a fraction of the circumference and the band is weakened by an oblique predetermined tear line. With this version, however, there is also the risk that the entire guarantee band remains under the bottle bead if the tear resistance of the band is greater than the connection to the cap.

Es ist daher eine Aufgabe der Erfindung, eine Schraubkappe der eingangs genannten Art zu schaffen, bei der das Garantie­band beim erstmaligen Abschrauben der Kappe zuverlässig reisst, wobei es in jedem Fall mit dem Kappenkörper verbunden bleibt und ohne dass es das spätere Wiederverschliessen des Behälters beeinträchtigt. Ausserdem soll die Schraubkappe ein erstmaliges Verschliessen erlauben, ohne dass das Garantie­system beeinträchtigt wird. Diese Aufgabe wird erfindungsge­mäss mit einer Schraubkappe gelöst, welche die Merkmale im Anspruch 1 aufweist.It is therefore an object of the invention to provide a screw cap of the type mentioned, in which the guarantee tape breaks reliably when the cap is unscrewed for the first time, in any case remaining connected to the cap body and without impairing the subsequent reclosing of the container. In addition, the screw cap should allow a first closing without affecting the guarantee system. This object is achieved according to the invention with a screw cap, which has the features in claim 1.

Es hat sich überraschend gezeigt, dass es überhaupt nicht nötig ist, das Garantieband über seinen gesamten Umfang ge­trennt bzw. trennbar vom Kappenkörper auszubilden. Vielmehr kann das Garantieband über einen relativ grossen Umfangsab­schnitt einstückig und fest mit dem unteren Kappenrand ver­bunden sein, wobei dieser Abschnitt nur eine Stütz- und Rück­haltefunktion hat und das symmetrische Aufsetzen der Kappe auf die Flasche ermöglicht, aber keine eigentliche Garantie­funktion übernimmt. Die Garantiefunktion wird durch den Komplementärabschnitt ausgeübt, der nicht oder nur abreiss­bar mit dem unteren Kappenrand verbunden ist. Dieser Ab­schnitt kann relativ kurz ausgebildet sein, so dass beim späteren Wiederverschliessen der Behältermündung nicht die besteht, dass sich das abgerissene Garantieband zwischen die Gewindegänge schiebt. Das Garantieband ist über seinen gesa­mten Umfang durchgehend ausgebildet, wodurch die nötige Um­fangsspannung beim erstmaligen Oeffnen erzielt wird. Dadurch wird ein Reissen der Sollbruchstelle am Garantieband gewähr­leistet.Surprisingly, it has been shown that it is not at all necessary to form the guarantee band over its entire circumference separately or separably from the cap body. Rather, the guarantee band can be integrally and firmly connected to the lower edge of the cap over a relatively large circumferential section, this section having only a support and retention function and allowing the cap to be placed symmetrically on the bottle, but does not actually perform a guarantee function. The guarantee function is exercised by the complementary section, which is not or only tearably connected to the lower edge of the cap. This section can be made relatively short, so that when the container mouth is later re-closed, the there is that the torn guarantee tape is pushed between the threads. The guarantee band is continuously formed over its entire circumference, which means that the necessary circumferential tension is achieved when it is opened for the first time. This ensures that the predetermined breaking point tears on the guarantee tape.

Besonders vorteilhaft erstreckt sich der fest verbundene Abschnitt des Garantiebandes über einen Winkel von mehr als 90° und weniger als 270°, vorzugsweise von 120° bis 260°. Der nicht fest mit der Kappe verbundene Komplementärabschnitt des Garantiebandes kann über abreissbare Stege mit dem unteren Rand der Kappe verbunden sein. Dabei können jedoch bereits zwei Stege völlig ausreichen, um den Komplementärabschnitt in seiner Position festzuhalten.The firmly connected section of the guarantee band extends particularly advantageously over an angle of more than 90 ° and less than 270 °, preferably from 120 ° to 260 °. The complementary section of the guarantee tape, which is not firmly connected to the cap, can be connected to the lower edge of the cap via tear-off webs. However, two webs can be sufficient to hold the complementary section in place.

Die Rückhalteelemente sind vorzugsweise am getrennt ausgebil­deten Komplementärabschnitt des Garantiebandes angeordnet, können sich aber wenigstens teilweise auch über den fest verbundenen Abschnitt erstrecken. Die Rückhalteelemente kön­nen dabei als verformbare Zungen ausgebildet sein, z.B. ge­mäss der EP-A-281 514 der Anmelderin. Alternativ können die Rückhalteelemente aber auch als einzelne Wulste ausgebildet sein, wie in der US-A-4,305,516 oder in der US-A-4,744,479 dargestellt. Es wäre sogar denkbar, dass als einziges Rück­halteelement ein umlaufender oder nahezu umlaufender Innen­wulst am Garantieband angeordnet ist.The retaining elements are preferably arranged on the separately formed complementary section of the guarantee band, but can also extend at least partially over the firmly connected section. The retaining elements can be designed as deformable tongues, e.g. according to applicant's EP-A-281 514. Alternatively, the retaining elements can also be designed as individual beads, as shown in US-A-4,305,516 or in US-A-4,744,479. It would even be conceivable that the only retaining element is a circumferential or almost circumferential inner bead on the guarantee band.

Um dem Garantieband für den erstmaligen Aufsetzvorgang eine gewisse Dehnbarkeit zu verleihen, ist es besonders vorteil­haft, wenn neben der Sollbruchstelle am Garantieband eine Materialausnehmung angeordnet ist. Diese Materialausnehmung kann z.B. als vertikaler Schlitz ausgebildet sein, der sich über einen Teil des Garantiebandes erstreckt. Anstelle eines Schlitzes könnte aber auch nur eine Kerbe im Garantieband angeordnet sein. Die Materialausnehmung nimmt Materialdehnun­ gen beim erstmaligen Aufschrauben auf und entlastet so die Sollbruchstelle.In order to give the guarantee band a certain stretchability for the first fitting process, it is particularly advantageous if a material recess is arranged next to the predetermined breaking point on the guarantee band. This material recess can be designed, for example, as a vertical slot which extends over part of the guarantee band. Instead of a slot, however, only one notch could also be arranged in the guarantee band. The material recess takes material expansion open when screwing on for the first time and thus relieves the predetermined breaking point.

Weitere Vorteile können erreicht werden, wenn im Bereich des lösbaren Komplementärabschnitts wenigstens eine nach innen gerichtete Stütznase am unteren Kappenrand angeordnet ist. Diese Stütznase verhindert, dass sich der nur über wenige Stege mit dem Kappenrand verbundene Komplementärabschnitt des Garantiebandes beim erstmaligen Aufsetzen in die Kappenöff­nung hineinschieben kann. Der obere Rand des Garantiebandes stützt sich vielmehr an der Nase ab, so dass ein Reissen der Abreissstege beim Aufsetzen der Kappe verhindert wird.Further advantages can be achieved if at least one inwardly directed support lug is arranged on the lower cap edge in the region of the detachable complementary section. This support lug prevents the complementary section of the guarantee band, which is connected to the edge of the cap only by a few webs, from being pushed into the cap opening when it is first put on. The upper edge of the guarantee band is rather supported on the nose, so that the tear-off bars are prevented from tearing when the cap is put on.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird nachstehend genauer beschrieben. Es zeigen:

  • Figur 1 eine Ansicht einer Behältermündung und einer Kappe mit gerissenem Garantieband,
  • Figur 2 einen Querschnitt durch eine erfindungsgemässe Schraubkappe,
  • Figur 3 einen Querschnitt durch ein Rückhalteelement am Garantieband in vergrössertem Massstab,
  • Figur 4 einen Querschnitt durch die Sollbruchstelle am Garantieband in vergrössertem Massstab, und
  • Figur 5 eine Ansicht von unten auf die Schraubkappe gemäss Figur 2.
An embodiment of the invention is shown in the drawings and will be described in more detail below. Show it:
  • FIG. 1 shows a view of a container mouth and a cap with a torn guarantee band,
  • FIG. 2 shows a cross section through a screw cap according to the invention,
  • FIG. 3 shows a cross section through a retaining element on the guarantee band on an enlarged scale,
  • 4 shows a cross section through the predetermined breaking point on the guarantee tape on an enlarged scale, and
  • 5 shows a view from below of the screw cap according to FIG. 2.

Figur 1 zeigt eine Schraubkappe 1 aus Kunststoffmaterial mit einem Innengewinde 5, die dazu bestimmt ist, eine Behälter­mündung 2 mit einem Aussengewinde 6 zu verschliessen. Derar­tige Schraubkappen werden bevorzugt zum Verschliessen von Flaschen mit Erfrischungsgetränken verwendet, wobei es sich in der Regel um Mehrwegflaschen aus Glas mit einer genormten Flaschenmündung handelt. Das Garantieband 3 besteht aus einem fest mit dem unteren Kappenrand verbundenen Umfangsabschnitt 9 und aus einem abreissbaren, bzw. nicht fest verbundenen Komplementärabschnitt 10. Die später noch erläuterten Rück­halteelemente auf der Innenseite des Garantiebands schnappen beim erstmaligen Aufschrauben der Kappe unter den Wulst 4 an der Behältermündung 2 und bewirken beim erstmaligen Abschrau­ben der Kappe die erforderliche Zugkraft zum Reissen des Garantiebandes.Figure 1 shows a screw cap 1 made of plastic material with an internal thread 5, which is intended to close a container mouth 2 with an external thread 6. Such screw caps are preferred for closing Bottles with soft drinks are used, which are usually reusable glass bottles with a standardized bottle mouth. The guarantee band 3 consists of a circumferential section 9 which is firmly connected to the lower edge of the cap and of a complementary section 10 which can be torn off or not firmly connected 2 and when unscrewing the cap for the first time, cause the necessary tensile force to tear the guarantee tape.

Der Querschnitt der Schraubkappe ist aus den Figuren 2 bis 4 ersichtlich. Die Schraubkappe 1 selbst kann an ihrem Kappen­boden eine Mündungsdichtung 16 oder aber auch ein anderes Dichtsystem wie z.B. eine eingelegte Dichtungsscheibe aufwei­sen. Die Querschnittsform der Schraubkappe und des Garantie­bandes ist derart gewählt, dass eine Herstellung in einem axial öffnenden Spritzgusswerkzeug möglich ist.The cross section of the screw cap can be seen from FIGS. 2 to 4. The screw cap 1 itself can have an orifice seal 16 or another sealing system such as e.g. have an inserted sealing washer. The cross-sectional shape of the screw cap and the guarantee strip is selected such that it can be manufactured in an axially opening injection molding tool.

Aus Figur 5 ist die Länge des fest mit der Unterkante 15 verbundenen Umfangsabschnitts 9 ersichtlich. Dieser erstreckt sich beim Ausführungsbeispiel über einen Winkel Alpha von ca. 240°. Dieser Abschnitt ist, wie aus Figur 2, rechte Seite ersichtlich, praktisch in seiner ganzen Wandstärke mit der Unterkante 15 verbunden und kann somit nicht abgerissen wer­den.FIG. 5 shows the length of the peripheral section 9 firmly connected to the lower edge 15. In the exemplary embodiment, this extends over an angle alpha of approximately 240 °. This section, as can be seen from FIG. 2 on the right side, is connected to the lower edge 15 practically in its entire wall thickness and therefore cannot be torn off.

Der nicht fest mit dem unteren Kappenrand verbundene Komple­mentärabschnitt 10 erstreckt sich demgemäss über einen Winkel Beta von ca. 120°. Die Querschnittsform des Garantiebandes in diesem Abschnitt ist aus Figur 2, linke Seite ersichtlich. Das Garantieband ist oben etwa keilförmig ausgebildet und an nur zwei Abreissstegen 12 und 12′ mit dem unteren Kappenrand verbunden.The complementary section 10, which is not firmly connected to the lower edge of the cap, accordingly extends over an angle Beta of approximately 120 °. The cross-sectional shape of the guarantee band in this section can be seen from FIG. 2, left side. The guarantee tape is approximately wedge-shaped at the top and connected to only two tear-off webs 12 and 12 'with the lower edge of the cap.

Als Rückhalteelemente dienen nach innen gerichtete Zungen 7, unter denen je ein Stützwulst 8 angeordnet ist. Beim erstma­ligen Aufschrauben der Kappe werden die Zungen 7 nach oben gebogen und gleiten so über den Wulst 4 an der Flaschenmün­dung. Ein Umbiegen der Zungen 7 nach unten wird durch die Stützwulste 8 verhindert, so dass die einmal unter den Wulst 4 eingerasteten Rückhalteelemente ohne Zerreissen des Garan­tiebandes 3 nicht mehr über den Wulst geschoben werden kön­nen.Inwardly directed tongues 7 serve as retaining elements, under each of which a support bead 8 is arranged. When the cap is screwed on for the first time, the tongues 7 are bent upwards and thus slide over the bead 4 at the bottle mouth. Bending of the tongues 7 downward is prevented by the support beads 8, so that the retaining elements once engaged under the bead 4 can no longer be pushed over the bead without tearing the guarantee band 3.

An einem Ende des festen Umfangsabschnittes 9 ist eine Soll­bruchstelle 11 am Garantieband angeordnet. Wie insbesondere aus Figur 4 ersichtlich ist, besteht diese aus einem horizon­talen Steg 17, der den festen Abschnitt 9 und den losen Kom­plementärabschnitt 10 miteinander verbindet. Um eine Ueber­dehnung der Sollbruchstelle 11 beim erstmaligen Aufsetzen zu verhindern, ist unmittelbar daneben am Abschnitt 9 eine Mate­rialausnehmung 13 in der Form eines Schlitzes vorgesehen. Dieser Schlitz erstreckt sich nur ca. über die Hälfte der Garantiebandbreite, so dass keine völlige Unterbrechung des Garantiebandes besteht. Anstelle des Schlitzes könnte auch nur eine Kerbe angeordnet werden, mit welcher die Wandstärke des Garantiebandes stark reduziert wird. Die Materialausneh­mung 13 entlastet die Sollbruchstelle 11, ohne dass dabei die ungleich grösseren Dehnungskräfte beim erstmaligen Abschrau­ben nennenswert reduziert werden.At one end of the fixed peripheral section 9, a predetermined breaking point 11 is arranged on the guarantee band. As can be seen in particular from FIG. 4, this consists of a horizontal web 17 which connects the fixed section 9 and the loose complementary section 10 to one another. In order to prevent the predetermined breaking point 11 from being overstretched when it is put on for the first time, a material recess 13 in the form of a slot is provided directly next to the section 9. This slot extends only about half of the guarantee bandwidth, so that there is no complete interruption of the guarantee band. Instead of the slot, it would also be possible to arrange only one notch with which the wall thickness of the guarantee tape is greatly reduced. The material recess 13 relieves the predetermined breaking point 11 without significantly reducing the disproportionately large expansion forces when unscrewing for the first time.

Aus Figur 3 ist auch noch die Stütznase 14 ersichtlich, wel­che auf der Innenseite der Kappe im Bereich des losen Komple­mentärabschnitts 10 angeordnet ist. Diese, etwas schräg nach unten geneigte Stütznase verhindert, dass sich der lose Kom­plementärabschnitt 10 beim erstmaligen Aufschrauben der Kappe in die Kappenöffnung hineinschieben kann. Damit werden vor allem die Abreissstege 12 und 12′ entlastet.FIG. 3 also shows the support lug 14, which is arranged on the inside of the cap in the region of the loose complementary section 10. This support nose, which is inclined slightly obliquely downwards, prevents the loose complementary section 10 from being able to slide into the cap opening when the cap is screwed on for the first time. In particular, the tear-off webs 12 and 12 'are relieved.

Aus Figur 3 ist die Anordnung der Rückhalteelemente 7 er­sichtlich, die sich über einen Winkel Delta von etwa 180° erstrecken. Drei der Rückhalteelemente liegen auf dem losen Komplementärabschnitt 10, während zwei der Rückhalteelemente 7′ bereits am festen Umfangsabschnitt 9 angeordnet sind. Das erste der Rückhalteelemente liegt der Sollbruchstelle 11 etwa diametral gegenüber. Die beiden Abreissstege 12 und 12′ lie­gen innerhalb eines Winkels Gamma von weniger als 90°, ausge­hend von der Sollbruchstelle 11. Die Anzahl der Rückhalteele­mente 7, der Abreissstege 12 sowie die Winkel der einzelnen Abschnitte können ersichtlicherweise den jeweiligen Gegeben­heiten angepasst werden. In bestimmten Fällen wäre es auch denkbar, am Garantieband mehr als eine Sollbruchstelle 11 vorzusehen. Auch die Querschnittsform des Garantiebandes kann dem jeweiligen Einzelfall angepasst werden.FIG. 3 shows the arrangement of the retaining elements 7, which extend over an angle delta of approximately 180 °. Three of the retaining elements lie on the loose complementary section 10, while two of the retaining elements 7 'are already arranged on the fixed peripheral section 9. The first of the retaining elements lies approximately diametrically opposite the predetermined breaking point 11. The two tear-off webs 12 and 12 'lie within an angle gamma of less than 90 °, starting from the predetermined breaking point 11. The number of retaining elements 7, the tear-off webs 12 and the angle of the individual sections can obviously be adapted to the respective circumstances. In certain cases it would also be conceivable to provide more than one predetermined breaking point 11 on the guarantee band. The cross-sectional shape of the guarantee band can also be adapted to the individual case.

Claims (13)

1. Schraubkappe (1) aus Kunststoffmaterial zum Verschliessen einer Behältermündung (2) mit einem am unteren Rand (15) der Kappe angeordneten und einstückig mit dieser ausge­bildeten, umlaufenden Garantieband (3), das dazu bestimmt ist, bei aufgesetzter Kappe einen ringförmigen Wulst (4) an der Behältermündung (2) zu untergreifen, und das zu diesem Zweck auf der Innenseite vorzugsweise mehrere Rückhalteelemente (7) aufweist, die beim erstmaligen Aufsetzen der Kappe über den Wulst schiebbar sind und die in der Endposition der Kappe unter den Wulst (4) einra­sten, dadurch gekennzeichnet, dass das Garantieband (3) einen Umfangsabschnitt (9) aufweist, der über einen Win­kel von mehr als 90° und von weniger als 270° reissfest mit der Kappe verbunden ist, sowie einen Komplementärab­schnitt (10), der nicht oder nur abreissbar mit der Kappe verbunden ist, und dass die benachbarten Enden der beiden Abschnitte (9, 10) in Umfangsrichtung auf einer Seite reissfest und auf der anderen Seite durch eine etwa ver­tikale Sollbruchstelle (11) miteinander verbunden sind.1.Screw cap (1) made of plastic material for closing a container mouth (2) with an encircling guarantee band (3) arranged at the lower edge (15) of the cap and designed in one piece therewith, which is intended, when the cap is attached, to form an annular bead ( 4) to reach under the container mouth (2), and which for this purpose preferably has a plurality of retaining elements (7) on the inside, which can be pushed over the bead when the cap is first put on and which in the end position of the cap under the bead (4 ) snap in, characterized in that the guarantee band (3) has a circumferential section (9) which is connected to the cap in a tear-resistant manner at an angle of more than 90 ° and less than 270 °, and a complementary section (10) which is not or is only tearably connected to the cap, and that the adjacent ends of the two sections (9, 10) are tear-resistant in the circumferential direction on one side and on the other n side are connected to one another by an approximately vertical predetermined breaking point (11). 2. Schraubkappe nach Anspruch 1, dadurch gekennzeichnet, dass die Sollbruchstelle (11) einen abreissbaren Steg (17) aufweist.2. Screw cap according to claim 1, characterized in that the predetermined breaking point (11) has a tear-off web (17). 3. Schraubkappe nach Anspruch 1 oder 2, dadurch gekennzeich­net, dass der nicht fest mit der Kappe verbundene Komple­mentärabschnitt (10) des Garantiebandes (3) über abreiss­bare Stege (12) mit dem unteren Rand (15) der Kappe ver­bunden ist.3. Screw cap according to claim 1 or 2, characterized in that the complementary portion (10) of the guarantee band (3) which is not firmly connected to the cap is connected to the lower edge (15) of the cap via tear-off webs (12). 4. Schraubkappe nach Anspruch 3, dadurch gekennzeichnet, dass sich der fest verbundene Abschnitt des Garantieban­des über einen Winkel (Alpha) von 120° bis 260° er­ streckt, und dass innerhalb eines sich an die Sollbruch­stelle (11) anschliessenden Komplementärabschnitts (10) von weniger als 90° zwei Abreissstege (12) angeordnet sind.4. Screw cap according to claim 3, characterized in that the firmly connected portion of the guarantee tape over an angle (alpha) of 120 ° to 260 ° stretches, and that two tear-off webs (12) are arranged within a complementary section (10) of less than 90 ° adjoining the predetermined breaking point (11). 5. Schraubkappe nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass sich wenigstens ein Teil der Rück­halteelemente (7) über den fest verbundenen Abschnitt (9) erstrecken.5. Screw cap according to one of claims 1 to 4, characterized in that at least some of the retaining elements (7) extend over the firmly connected section (9). 6. Schraubkappe nach Anspruch 5, dadurch gekennzeichnet, dass die Rückhalteelemente verformbare Zungen (7) sind.6. Screw cap according to claim 5, characterized in that the retaining elements are deformable tongues (7). 7. Schraubkappe nach Anspruch 5, dadurch gekennzeichnet, dass die Rückhalteelemente einzelne Wulste sind.7. Screw cap according to claim 5, characterized in that the retaining elements are individual beads. 8. Schraubkappe nach Anspruch 6 oder 7, dadurch gekennzeich­net, dass die Rückhalteelemente (7) innerhalb eines sich an die Sollbruchstelle (11) anschliessenden Abschnittes von 180° am lösbaren Komplementärabschnitt (10) und ggf. am fest verbundenen Abschnitt (9) des Garantiebandes (3) angeordnet sind.8. Screw cap according to claim 6 or 7, characterized in that the retaining elements (7) within a section of the predetermined breaking point (11) adjoining section of 180 ° on the detachable complementary section (10) and possibly on the firmly connected section (9) of the guarantee band (3) are arranged. 9. Schraubkappe nach Anspruch 4 und 8, dadurch gekennzeich­net, dass insgesamt fünf Rückhalteelemente (7) angeordnet sind, davon drei am lösbaren Komplementärabschnitt (10) und zwei am fest verbundenen Abschnitt (9).9. Screw cap according to claim 4 and 8, characterized in that a total of five retaining elements (7) are arranged, three of which on the detachable complementary section (10) and two on the firmly connected section (9). 10. Schraubkappe nach Anspruch 2, dadurch gekennzeichnet, dass neben der Sollbruchstelle (11) eine Materialausneh­mung (13) zur Erhöhung der Dehnbarkeit beim erstmaligen Aufsetzen der Kappe am Garantieband angeordnet ist.10. Screw cap according to claim 2, characterized in that in addition to the predetermined breaking point (11) a material recess (13) is arranged to increase the elasticity when the cap is first put on the guarantee band. 11. Schraubkappe nach Anspruch 10, dadurch gekennzeichnet, dass die Materialausnehmung (13) als etwa vertikaler Schlitz ausgebildet ist, der sich über einen Teil des Garantiebandes erstreckt.11. Screw cap according to claim 10, characterized in that the material recess (13) is designed as an approximately vertical slot which extends over a part of the guarantee band. 12. Schraubkappe nach Anspruch 10 oder 11, dadurch gekenn­zeichnet, dass die Materialausnehmung am fest verbundenen Abschnitt (9) des Garantiebandes angeordnet ist.12. Screw cap according to claim 10 or 11, characterized in that the material recess is arranged on the firmly connected section (9) of the guarantee band. 13. Schraubkappe nach einem der Ansprüche 3 bis 12, dadurch gekennzeichnet, dass im Bereich des lösbaren Komplemen­tärabschnitts (10) wenigstens eine nach innen gerichtete Stütznase (14) am unteren Kappenrand (15) derart angeord­net ist, dass beim erstmaligen Aufsetzen der Kappe ein Hineinschieben des Garantiebandes (3) in die Kappenöff­nung verhindert wird.13. Screw cap according to one of claims 3 to 12, characterized in that in the region of the detachable complementary section (10) at least one inwardly directed support lug (14) is arranged on the lower edge of the cap (15) such that when the cap is put on for the first time it is pushed in the guarantee band (3) in the cap opening is prevented.
EP89810883A 1988-11-28 1989-11-20 Screw cap with a tamper-evident band Expired - Lifetime EP0371920B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89810883T ATE91264T1 (en) 1988-11-28 1989-11-20 SCREW CAP WITH WARRANTY STRIP.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH441188 1988-11-28
CH4411/88 1988-11-28

Related Child Applications (2)

Application Number Title Priority Date Filing Date
EP91108998A Division EP0460557B1 (en) 1988-11-28 1989-11-20 Screw-cap with tamper-evident band
EP91108998.5 Division-Into 1989-11-20

Publications (3)

Publication Number Publication Date
EP0371920A2 true EP0371920A2 (en) 1990-06-06
EP0371920A3 EP0371920A3 (en) 1990-11-22
EP0371920B1 EP0371920B1 (en) 1993-07-07

Family

ID=4275637

Family Applications (2)

Application Number Title Priority Date Filing Date
EP89810883A Expired - Lifetime EP0371920B1 (en) 1988-11-28 1989-11-20 Screw cap with a tamper-evident band
EP91108998A Expired - Lifetime EP0460557B1 (en) 1988-11-28 1989-11-20 Screw-cap with tamper-evident band

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP91108998A Expired - Lifetime EP0460557B1 (en) 1988-11-28 1989-11-20 Screw-cap with tamper-evident band

Country Status (4)

Country Link
EP (2) EP0371920B1 (en)
AT (2) ATE91264T1 (en)
DE (2) DE58905985D1 (en)
ES (2) ES2041441T3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4201997C1 (en) * 1992-01-25 1992-12-10 Stella Kunststofftechnik Gmbh, 6228 Eltville, De
EP0891929A2 (en) * 1997-07-15 1999-01-20 Mouldtec Kunststoff GmbH Screw closure with tamper indicating band
WO2002016217A1 (en) 2000-08-23 2002-02-28 Bericap Closure comprising means for locking radial deformation of the tamperproof band

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4217539C2 (en) * 1992-05-27 1995-01-05 Frank Schellenbach Sealing cap
DE4221004A1 (en) * 1992-06-26 1994-01-05 Mouldtec Pvg Ag Meilen Cap for beverage bottles
EG21314A (en) * 1992-07-16 2000-10-31 Driutt Rodney Malcolm Tamper evident closure
CZ215696A3 (en) * 1995-07-21 1997-02-12 Nord Est Dev Bottle closure made of plastic material
FR2744988B1 (en) * 1996-02-21 1998-04-10 Nord Est Dev PLASTIC PLUG HAVING A tamper-evident ring, cap / container assembly, method for making such a cap, and method for making such a cap / container assembly
AUPO788597A0 (en) 1997-07-14 1997-08-07 Closures And Packaging Services Limited Closure
IT1300020B1 (en) 1998-05-08 2000-04-04 Sacmi SCREW CAP IN PLASTIC MATERIAL WITH GUARANTEE RING.
DE19827242A1 (en) 1998-06-18 1999-12-30 Mouldtec Kunststoff Gmbh Sealing cap, in particular screw cap made of plastic with a guarantee band
EP1397296B8 (en) 2001-06-18 2005-11-23 Bericap Holding GmbH Screw cap comprising a tamper-evident band
JP5007893B1 (en) * 2011-06-08 2012-08-22 村山 哲夫 Pilfer proof cap
USD747201S1 (en) 2013-09-18 2016-01-12 Bericap Closure
FR3015442B1 (en) 2013-12-24 2016-02-05 Bericap ARTICULATED CLAMPING DEVICE WITH FIRST OPENING INDICATOR
USD833278S1 (en) 2014-09-03 2018-11-13 Bericap Closure for a container

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FR2457813A1 (en) * 1979-05-31 1980-12-26 Grussen Jean Screw cap bottle closure moulded with integral security lip - for containing carbonated drinks
US4278180A (en) * 1980-01-24 1981-07-14 Aluminum Company Of America Container closure with breakable annular ring
US4550843A (en) * 1982-12-14 1985-11-05 Maxcap, Inc. Bottle caps
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EP0228618A2 (en) * 1985-12-19 1987-07-15 Pharma-Gummi Wimmer West GmbH Origin-protected container closure
US4744479A (en) * 1986-07-11 1988-05-17 Interplastic Ag Tamper indicating closure for bottles and the like
WO1988005754A1 (en) * 1987-01-30 1988-08-11 Walter Wiedmer Ag Plastikform Tamper-proof ring for containers
EP0281514A1 (en) * 1987-02-26 1988-09-07 Crown Cork AG Closure cap with a warranty strap

Cited By (5)

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Publication number Priority date Publication date Assignee Title
DE4201997C1 (en) * 1992-01-25 1992-12-10 Stella Kunststofftechnik Gmbh, 6228 Eltville, De
EP0891929A2 (en) * 1997-07-15 1999-01-20 Mouldtec Kunststoff GmbH Screw closure with tamper indicating band
EP0891929A3 (en) * 1997-07-15 1999-02-03 Mouldtec Kunststoff GmbH Screw closure with tamper indicating band
WO2002016217A1 (en) 2000-08-23 2002-02-28 Bericap Closure comprising means for locking radial deformation of the tamperproof band
FR2813288A1 (en) * 2000-08-23 2002-03-01 Rical Sa INVIOLABILITY SYSTEM FOR A PLUG COMPRISING MEANS FOR LOCKING THE RADIAL DEFORMATION OF THE INVIOLABILITY RING DURING ASSEMBLY

Also Published As

Publication number Publication date
EP0371920B1 (en) 1993-07-07
ES2041441T3 (en) 1993-11-16
DE58905985D1 (en) 1993-11-25
ATE96110T1 (en) 1993-11-15
ATE91264T1 (en) 1993-07-15
EP0460557B1 (en) 1993-10-20
ES2045988T3 (en) 1994-01-16
EP0371920A3 (en) 1990-11-22
DE58904871D1 (en) 1993-08-12
EP0460557A2 (en) 1991-12-11
EP0460557A3 (en) 1991-12-18

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