EP0459941B1 - Schraubkappe mit beim erstmaligen Aufschrauben dehnbarem Garantieband - Google Patents

Schraubkappe mit beim erstmaligen Aufschrauben dehnbarem Garantieband Download PDF

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Publication number
EP0459941B1
EP0459941B1 EP91810294A EP91810294A EP0459941B1 EP 0459941 B1 EP0459941 B1 EP 0459941B1 EP 91810294 A EP91810294 A EP 91810294A EP 91810294 A EP91810294 A EP 91810294A EP 0459941 B1 EP0459941 B1 EP 0459941B1
Authority
EP
European Patent Office
Prior art keywords
screw cap
guarantee strip
cap according
lower edge
relief opening
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.)
Expired - Lifetime
Application number
EP91810294A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0459941A1 (de
Inventor
Herwig Janousch
Michael Kirchgessner
Franz Thomas Bartl
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.)
obrist Closures Switzerland
obrist Closures Switzerlandroemerstrasse 83 Ch 41
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 AT91810294T priority Critical patent/ATE95785T1/de
Publication of EP0459941A1 publication Critical patent/EP0459941A1/de
Application granted granted Critical
Publication of EP0459941B1 publication Critical patent/EP0459941B1/de
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
    • B65D41/3442—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 which a first unscrewing of the cap is indicated by a tearing of the guarantee band.
  • Screw caps of this type have long been known and used, particularly in the field of soft drinks.
  • a problem with the known caps is, in particular, that when the container mouths are closed, the guarantee band has to be stretched somewhat so that the retaining element can be pushed over the bead on the bottle mouth. Since the screw cap rotates at the same time, there is a risk that the predetermined breaking point will already tear or that it will be permanently deformed in such a way that the guarantee band can no longer perform its function. On the other hand, the predetermined breaking point must also be dimensioned in such a way that the cap can be unscrewed for the first time without excessive force.
  • the invention is based on the knowledge that the im The forces that occur during the first screwing on are not the same as when screwing off for the first time.
  • the relief opening now has a particularly advantageous effect that when the screw is screwed on for the first time it can expand in the circumferential direction without endangering the material webs of the predetermined breaking point.
  • the lower material web of the predetermined breaking point causes a force curve when unscrewing, which practically does not affect the relief opening and which therefore causes the stretching of the guarantee band to occur to a much lesser extent when unscrewing than when screwing on for the first time.
  • the guarantee tape actually breaks and thus indicates that it has been unscrewed for the first time.
  • the relief opening can have very different shapes depending on the application. It can e.g. have the shape of an approximately vertical slot open towards the lower edge of the guarantee band, which extends over part of the guarantee band.
  • the relief opening can also be designed as a window which is arranged at a distance from the lower edge of the guarantee band. The lower edge of the guarantee band remains uninterrupted over its entire circumference, which can improve the guarantee function.
  • the window can be approximately rectangular, but could also have a polygonal, round or other configuration. In certain cases, it would also be conceivable to arrange several relief openings next to one another.
  • the guarantee band has a peripheral section on which it is connected to the lower edge of the cap and if it has a complementary section on which it is connected to the lower edge of the cap by means of tear-off webs, with one or the predetermined breaking point is arranged between each of the two boundary areas between the sections.
  • the relief opening is preferably relatively fixed to the cap connected peripheral portion arranged.
  • the guarantee band on the complementary section has a reinforced retaining element on the inside, for example in the form of a bead, the webs between the guarantee band and the cap tear when unscrewed, while the lower material web of the predetermined breaking point still holds. In the course of the further unscrewing process, the lower material web also tears without any significant stretch taking place.
  • the material webs can run parallel or at an angle to the circumferential direction of the guarantee band. Good results can also be achieved with two relief openings next to each other.
  • 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 preferably used for closing bottles with soft drinks, which are usually reusable glass bottles with a standardized bottle mouth. But they can also be used with single-use glass and plastic bottles.
  • the guarantee band 3 does not remain under the bead 4 on the bottle neck, since this would mean a considerable additional effort when cleaning the bottle. Recycling of plastic bottles is also made easier.
  • the guarantee band therefore has a predetermined breaking point 11 in the circumferential direction, which has the effect that the guarantee band can be removed from the bottle mouth and preferably remains connected to the screw cap.
  • a thin film connection 22 is also conceivable for the tear-off connection to the rest of the cap.
  • the guarantee band 3 consists of a circumferential section 9 which is relatively firmly connected to the lower edge of the cap and a complementary section 10 which can be torn off or not firmly connected.
  • a retaining element in the form of a bead 8 is arranged on the inside 7 of the guarantee band, preferably on the complementary section 10, which snaps under the bead 4 at the container mouth 2 when the cap is unscrewed for the first time and which, when unscrewed for the first time, causes the required tensile force to tear the guarantee band.
  • An inner seal 16 is arranged on the cap base 15 and engages in the container mouth.
  • the screw cap could also be provided with a sealing insert.
  • the cap side wall 17 is preferably provided with a rim to increase the grip.
  • the guarantee band 3 is connected in the area of the complementary section 10 via webs 20 to the lower edge 18 of the cap.
  • a reinforced bead 8 is also arranged on this complementary section and serves as a retaining element. It can be seen from FIG. 5 that the bead 8 extends approximately over an angle ⁇ and at the same time merges at both ends into a latching edge 21 which is arranged on the circumferential section 9 firmly connected to the cap edge.
  • the predetermined breaking point 11 lies in the border area between the two sections 9 and 10. It is formed by an upper material web 13 and a lower material web 14, which is arranged on the lower edge 19 of the guarantee band.
  • the two material webs 13 and 14 are offset vertically from one another in cross-section and in such a way that the inner wall of the upper material web 13 has approximately the same diameter as the outer wall of the lower material web 14. This arrangement makes it easier to eject the closure cap from the injection molding tool without causing damage to the material webs 13 and 14.
  • the guarantee band runs in the complementary section 10 in a manner known per se at the upper edge approximately wedge-shaped, which also serves for better demoldability from the tool. At the peripheral portion 9, the guarantee band is connected relatively firmly to the lower edge 18 of the cap, which is particularly clearly visible on the right side in FIG.
  • the window-shaped relief opening 12 could be formed in a similar manner to the space between the material webs 13 and 14. With a total height of the guarantee band of approximately 5 mm, the relief opening obviously has only very small dimensions.
  • Figure 6 shows the guarantee tape in the unloaded state, especially before the cap is screwed on for the first time.
  • the material webs 13 and 14 of the predetermined breaking point are relaxed and the window-shaped relief opening 12 is rectangular without distortion.
  • the cap When the cap is unscrewed for the first time, it is rotated in the opposite direction in the direction of arrow b. Since the retaining element 8 can no longer slide over the bead 4, the webs 20 tear at the complementary section 10. The predetermined breaking point is exposed to a great deal of elongation at this unscrewing stage, as can be seen from FIG. 8, but the two material webs 13 and 14 are not yet cracked. Starting from the end of the retaining element 8, various lines of force c run on the one hand in the circumferential direction and on the other hand obliquely against the lower cap edge 18 without the relief opening 12 being affected in the process. This can therefore not cause any appreciable stretch, so that the tensile forces are fully effective in the predetermined breaking point.
  • FIG. 9 shows a further stage of the unscrewing process, in which the upper material web 13 has already torn.
  • the complementary section 10 now runs at an even steeper angle to the lower cap edge 18 or to the circumferential section 9 which is firmly connected to the cap edge.
  • the lines of force now run only through the lower material web 14 and also so obliquely that the relief opening does not end at the end of the tear-off process is affected.
  • a further rotation of the screw cap in the unscrewing direction b will also cause the lower material web 14 to tear, so that the state shown in FIG. 1 is reached.
  • Figure 10 shows a modified embodiment of the invention with a relief opening in the form of a slot 22 which is open downwards.
  • the effect is similar to the window-shaped relief opening, but with the flow of forces in the circumferential direction at the bottom the guarantee band is interrupted by the slot 22.
  • Figure 11 finally shows a variant with two relief openings 12 and 12 ', which are designed as superscript rectangles. Further relief openings could be arranged on the fixed peripheral section 9, in particular at its other end.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
EP91810294A 1990-04-27 1991-04-19 Schraubkappe mit beim erstmaligen Aufschrauben dehnbarem Garantieband Expired - Lifetime EP0459941B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91810294T ATE95785T1 (de) 1990-04-27 1991-04-19 Schraubkappe mit beim erstmaligen aufschrauben dehnbarem garantieband.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1453/90 1990-04-27
CH145390 1990-04-27

Publications (2)

Publication Number Publication Date
EP0459941A1 EP0459941A1 (de) 1991-12-04
EP0459941B1 true EP0459941B1 (de) 1993-10-13

Family

ID=4210824

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91810294A Expired - Lifetime EP0459941B1 (de) 1990-04-27 1991-04-19 Schraubkappe mit beim erstmaligen Aufschrauben dehnbarem Garantieband

Country Status (11)

Country Link
EP (1) EP0459941B1 (pt)
JP (1) JPH04242555A (pt)
AR (1) AR246911A1 (pt)
AT (1) ATE95785T1 (pt)
AU (1) AU648546B2 (pt)
BR (1) BR9101686A (pt)
CA (1) CA2041078A1 (pt)
DE (1) DE59100477D1 (pt)
ES (1) ES2046033T3 (pt)
NO (1) NO911503L (pt)
ZA (1) ZA913157B (pt)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0965533A1 (de) 1998-06-18 1999-12-22 Mouldtec Kunststoff GmbH Verschlusskappe, insbesondere Schraubkappe aus Kunststoff mit einem Garantieband

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5111947A (en) * 1990-12-04 1992-05-12 Patterson Michael C Tamper proof cap and container
JPH06508587A (ja) * 1991-06-29 1994-09-29 アルコア　ドイッチュラント　ゲゼルシャフト　ミット　ベシュレンクテル　ハフツング　フェルパックングスヴェルケ 容器のプラスチック蓋
US5937726A (en) * 1991-06-29 1999-08-17 Alcoa Deutschland Gmbh Method for cutting vertical incision in container cap
DE4211992A1 (de) * 1992-04-09 1993-10-14 Mouldtec Pvg Ag Meilen Flaschenkappe mit Sicherungsring
EG21314A (en) 1992-07-16 2000-10-31 Driutt Rodney Malcolm Tamper evident closure
JP3051637B2 (ja) * 1993-07-19 2000-06-12 株式会社吉野工業所 キャップ
US5893474A (en) * 1994-06-24 1999-04-13 Crown Cork Ag Screw cap with anti-tamper strip
IT1290532B1 (it) * 1996-05-02 1998-12-04 Alcan Rorschach Ag Coperchio con chiusura a vite per una confezione di metallo nonche' procedimento per collegare la chiusura a vite con l'elemento di
AUPO788597A0 (en) 1997-07-14 1997-08-07 Closures And Packaging Services Limited Closure
DE19730324A1 (de) * 1997-07-15 1999-01-28 Mouldtec Kunststoff Gmbh Schraubkappe mit Garantieband
BR202012020634U2 (pt) * 2012-08-17 2018-12-11 Alberto Llahuet Saura aperfeiçoamento introduzido em lata de bebidas e similares
JP7102095B2 (ja) * 2016-12-27 2022-07-19 株式会社吉野工業所 封緘付きねじキャップ

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH653307A5 (de) * 1981-12-11 1985-12-31 Walter Wiedmer Schraubverschluss mit garantiestreifen fuer behaelter.
DE3345775A1 (de) * 1983-12-17 1985-06-20 Owens-Illinois, Inc., Toledo, Ohio Diebstahlsichere packung
GR850153B (pt) * 1984-02-06 1985-03-29 Obrist Ag Crown
EP0254673B1 (de) * 1986-07-11 1990-04-18 Interplastic AG Sicherheitsband an einem Gebindeverschluss
HUT52444A (en) * 1986-09-24 1990-07-28 Alplast Snc Tearing-band locking cap

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0965533A1 (de) 1998-06-18 1999-12-22 Mouldtec Kunststoff GmbH Verschlusskappe, insbesondere Schraubkappe aus Kunststoff mit einem Garantieband

Also Published As

Publication number Publication date
DE59100477D1 (de) 1993-11-18
AR246911A1 (es) 1994-10-31
NO911503D0 (no) 1991-04-17
CA2041078A1 (en) 1991-10-28
BR9101686A (pt) 1991-11-26
AU7509991A (en) 1991-11-07
AU648546B2 (en) 1994-04-28
ES2046033T3 (es) 1994-01-16
ATE95785T1 (de) 1993-10-15
JPH04242555A (ja) 1992-08-31
NO911503L (no) 1991-10-28
ZA913157B (en) 1992-01-29
EP0459941A1 (de) 1991-12-04

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