EP0619242B1 - Capuchon de fermeture laissant échapper la pression - Google Patents

Capuchon de fermeture laissant échapper la pression Download PDF

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Publication number
EP0619242B1
EP0619242B1 EP94104124A EP94104124A EP0619242B1 EP 0619242 B1 EP0619242 B1 EP 0619242B1 EP 94104124 A EP94104124 A EP 94104124A EP 94104124 A EP94104124 A EP 94104124A EP 0619242 B1 EP0619242 B1 EP 0619242B1
Authority
EP
European Patent Office
Prior art keywords
weakening groove
end wall
cap
bottle
closure cap
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
EP94104124A
Other languages
German (de)
English (en)
Other versions
EP0619242A1 (fr
Inventor
Kurt Fernholz
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.)
METALLWARENFABRIK GmbH
Original Assignee
METALLWARENFABRIK GmbH
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 METALLWARENFABRIK GmbH filed Critical METALLWARENFABRIK GmbH
Publication of EP0619242A1 publication Critical patent/EP0619242A1/fr
Application granted granted Critical
Publication of EP0619242B1 publication Critical patent/EP0619242B1/fr
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
    • B65D51/00—Closures not otherwise provided for
    • B65D51/16—Closures not otherwise provided for with means for venting air or gas
    • B65D51/1633—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by automatic opening of the closure, container or other element
    • B65D51/1661—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by automatic opening of the closure, container or other element by means of a passage for the escape of gas between the closure and the lip of the container mouth
    • 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
    • B65D51/00—Closures not otherwise provided for
    • B65D51/16—Closures not otherwise provided for with means for venting air or gas
    • B65D51/1633—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by automatic opening of the closure, container or other element
    • B65D51/1638—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by automatic opening of the closure, container or other element by means of an element bursting upon a predetermined pressure in the container being exceeded

Definitions

  • the invention relates to a safety closure for containers, in particular for bottles containing fruit juices, for releasing excess pressure, e.g. arises from a fermentation process in the bottle.
  • a safety closure in which a weakening groove is provided in the end wall of the closure cap, on which the end wall tears when the bottle is overpressured, so that an explosive cracking of the bottle is avoided.
  • the weakening groove is located on the outside of the front wall. This has the consequence that it is visible from the outside and interrupts or disturbs a print that is contained on the closure cap. It should be taken into account that when the closure cap is manufactured, the printing is carried out first and that the weakening groove is normally produced subsequently and the printing is partially destroyed.
  • a visible sign of the beginning fermentation process is that the end wall of the closure cap bulges outwards at a pressure which is below the trigger pressure.
  • the seal stands out from the container wall and allows excess pressure to escape between the seal and the container wall / bottle thread, unless this path is blocked, for example, by pulp.
  • a safety closure for containers which comprises a plastic or the like. has existing closure cap which engages with a thread in a container thread and is provided on the inside of its end wall with a circumferential weakening groove. A sealing material is arranged in the sealing cap. The weakening groove is said to promote the bulging of the cap end wall in the event of overpressure.
  • a safety seal from which the preamble of claim 1 is based, is known from DE-A-31 01 751.
  • This safety seal is intended, in the case of an overpressure which arises in the case of carbonated beverages from great external heating or strong vibration, from a weakening groove limited lid, which is connected to the edge of the closure cap by a bridge.
  • the weakening groove is provided on the outside of the end cap wall. Another weakening groove runs through the sealing material, which is located on the inside of the end wall.
  • US-A-3 713 545 describes a closure cap in which an I-shaped line of weakness extends on the inside of the end wall.
  • the end wall bulges out in a dome shape, with the tears open rectilinear weakening groove extending above the apex and the sealing material underneath penetrates out of the gap. This removes sealing material from the sealing area between the cap and the bottle neck, so that excess pressure can escape along the bottle thread.
  • the weakening groove running on the inside serves the purpose of making it easier for the sealing material to emerge from the open gap.
  • the invention is based on the object of specifying an improved security lock which enables an additional triggering in order to further reduce the remaining risks.
  • the weakening groove is attached to the inside of the end wall.
  • the safety closure according to the invention is particularly suitable for bottles containing fruit juice beverages.
  • Fruit drinks are usually bottled at an elevated temperature of around 80-90 ° C.
  • the caps made of aluminum are applied, the jacket of which is rolled into the container thread, which causes the cap thread arises.
  • the volume of the liquid decreases and a free space and a vacuum are created in the bottle.
  • the end wall of the cap is drawn into the inside of the bottle, causing the end wall to deform slightly.
  • a fermentation process caused by the action of bacteria can take place.
  • an overpressure can build up in the bottle, which may cause the bottle material to burst.
  • the end wall of the cap bulges outwards.
  • the release pressure at which the cap material tears at the weakening groove is around 3-4 bar. If the end wall is torn along the weakening groove, the sealing material is no longer able to withstand the pressure. It tears in some places and allows pressure relief to the outside.
  • the weakening groove is provided on the inside, it is covered by the sealing material.
  • the open unpainted weakening groove is thus protected from corrosion by the sealing material, in particular against attacks by the liquid contained in the bottle (fruit acid).
  • the line of weakness provided on the inside of the cap inevitably forms a convex deformation of the round plate delimited by the line of weakness toward the interior of the container.
  • the security closure according to the invention no bulge caused by the weakening groove, but a bulging inwards.
  • the inward indentation changes into an outward bulge, as a result of which the fermentation process is visibly displayed to the outside. If the pressure is increased further, the cap breaks along the weakening groove.
  • the change from an inwardly curved cap surface to an outwardly bulged cap surface can basically be observed in all bottles whose contents have passed into fermentation.
  • the weakening groove can completely enclose the central region of the end wall of the closure cap.
  • a weakening groove that does not form a closed circle and leaves a bridge that connects the round blank to the edge region of the cap.
  • Such a bridge can act as a hinge in order to hold the circular blank on the cap when triggered.
  • Two such bridges can be provided, offset by 180 ° to one another and opposite one another. In this case, the round plate between the bridges forms two wings that fold up when triggered.
  • FIG. 1 shows a container in the form of a bottle 10, the bottle neck having a container thread 11.
  • the cap thread 15 is rolled, which nestles against the container thread 11.
  • the peripheral jacket 13 tears along the weakening line 18, so that the securing ring 16 remains on the bottle neck or, depending on the embodiment, tears open with notches and remains on the upper peripheral jacket 13.
  • a sealing material 20 is applied to the end wall 14 inside the closure cap 12.
  • This sealing material 20 made of elastic plastic presses against the upper end 21 of the bottle neck and causes a seal here.
  • a V-shaped weakening groove 22 (FIG. 2) is provided, which forms a closed circle and encloses a round blank.
  • the weakening groove 22 is created before the sealing material 20 is introduced into the closure cap.
  • the originally flat or slightly convex end wall 14 deforms in the manner shown in FIG. 1. Since the weakening groove 22 is provided on the inside of the end wall 14, it is not loaded in the tear direction by the negative pressure. The weakening groove 22 is located approximately above the inner edge of the bottle opening. The curvature of the end wall 14 acts in the direction that the weakening groove 22 closes a little. The weakening groove therefore favors the arching of the end wall 14, as a result of which the sealing material 20 comes even closer to the upper end 21 of the bottle neck and clings tightly to the bottle opening.
  • the overpressure escapes along the arrows drawn between the upper end 21 of the bottle neck and the sealing material 20 lifting away therefrom. If the overpressure is even greater or if overpressure suddenly occurs, the end wall tears along the weakening groove 22. The excess pressure is then discharged through the sealing material 20, which is also torn open.
  • the safety closure of the first embodiment serves to close bottles which contain fruit drinks or must and which are normally under no or only a slight internal pressure.
  • a vacuum is created in the headspace of the bottle by heating in order to make the contents of the bottle durable.
  • the upper shoulder 23 of the closure cap 12 is not pressed against the outside of the upper end of the bottle neck, so that there is a cavity 24 under this shoulder 23 is not filled with the sealing material 20.
  • the closure cap 12a of the second exemplary embodiment serves to close a bottle which contains carbonated drinks, for example lemonade or water.
  • carbonated drinks for example lemonade or water.
  • there is normally no negative pressure inside the bottle because there is no sterilization after filling.
  • the internal pressure can be up to rise to about 6 bar.
  • the closure must seal securely up to this pressure in order to avoid a taste impairment due to CO 2 losses.
  • the higher sealing is achieved by two measures, one in that the weakening groove 22 is offset inwards so that the blank enclosed by the line of weakness has a smaller diameter, and the other in that the shoulder 23 on which the side wall in the end wall merges, is pressed in laterally, the sealing material 20 being pressed under the shoulder 23 tightly against the side wall of the bottle neck.
  • the constriction in the area of the shoulder 23 is also referred to as the "depth of draw”. This drawing depth is up to a maximum of 2.6 mm.
  • the sealing material also seals on the outside of the bottle neck.
  • a corrugated bead 25 is provided underneath the annular shoulder 23, which facilitates gripping by hand.
  • the round blank enclosed by the weakening groove 22 has a diameter of 20 mm in the first embodiment, but only 15 mm in the second embodiment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Cookers (AREA)
  • Lock And Its Accessories (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)

Claims (5)

  1. Fermeture de sécurité pour des récipients, comportant un capuchon de fermeture (12) en métal qui s'emboîte avec un filet (15) dans le filet d'un récipient (11) et qui est doté, sur sa paroi frontale, d'une rainure d'atténuation (22) sensiblement périphérique et d'un matériau d'étanchéité (20) prévu dans le capuchon de fermeture (12), caractérisée en ce que la rainure d'atténuation (22) est placée sur le côté intérieur de la paroi frontale (14).
  2. Fermeture de sécurité selon la revendication 1, caractérisée en ce que la rainure d'atténuation (22) est disposée dans la zone de la paroi frontale (14) située au-dessus de l'extrémité supérieure (21) de la paroi du récipient.
  3. Fermeture de sécurité selon l'une des revendications 1 ou 2, caractérisée en ce que la rainure d'atténuation (22) forme un cercle fermé.
  4. Fermeture de sécurité selon l'une des revendications 1 ou 2, caractérisée en ce que la rainure d'atténuation (22) est interrompue et laisse libre au moins un pont qui assemble la partie médiane de la paroi frontale (14) avec le bord.
  5. Fermeture de sécurité selon l'une des revendications 1 à 4, caractérisée en ce que le capuchon de fermeture (12) présente à son extrémité supérieure, un épaulement (23) introduit latéralement et qui presse la zone marginale du matériau d'étanchéité (20) de l'extérieur contre la paroi latérale du récipient et en ce que la ligne d'atténuation (22) est décalée vers l'intérieur par rapport au côté intérieur de la paroi du récipient (10).
EP94104124A 1993-04-09 1994-03-16 Capuchon de fermeture laissant échapper la pression Expired - Lifetime EP0619242B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9305416U DE9305416U1 (de) 1993-04-09 1993-04-09 Sicherheitsverschluß für Behälter
DE9305416U 1993-04-09

Publications (2)

Publication Number Publication Date
EP0619242A1 EP0619242A1 (fr) 1994-10-12
EP0619242B1 true EP0619242B1 (fr) 1997-10-22

Family

ID=6891855

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94104124A Expired - Lifetime EP0619242B1 (fr) 1993-04-09 1994-03-16 Capuchon de fermeture laissant échapper la pression

Country Status (3)

Country Link
EP (1) EP0619242B1 (fr)
AT (1) ATE159489T1 (fr)
DE (2) DE9305416U1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29605651U1 (de) * 1996-03-27 1996-07-18 Wiedemann, Michael, 33100 Paderborn Sicherheitsverschluß von Getränkeflaschen bzw. -Dosen
DE19636876C1 (de) * 1996-09-11 1997-10-09 Eckes Granini Gmbh Co Kg Sicherheitsverschluß für Behälter
DE19738301C2 (de) * 1997-09-02 2000-07-27 Eckes Granini Gmbh Co Kg Sicherheitsverschluß für Behälter
DE19849834C1 (de) * 1998-10-29 2000-02-10 Rauh Gmbh & Co Blechwarenfabri Sicherheitsverschluß für Behälter
US7582340B2 (en) * 2006-04-06 2009-09-01 Packs Co., Ltd Container for retort pouch food
US10945546B2 (en) * 2017-12-04 2021-03-16 Mapa Gmbh Drinking attachment for a drinking vessel and drinking vessel with such attachment

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994013549A1 (fr) * 1992-12-08 1994-06-23 Wilhelm Wazel Systeme de fermeture, notamment pour bouteilles

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3713545A (en) * 1971-09-14 1973-01-30 Aluminum Co Of America Venting closure
GB1534570A (en) * 1977-10-20 1978-12-06 Denroy Plastics Ltd Closures for containers
DE3101751A1 (de) * 1981-01-21 1982-12-02 Herbert 5501 Trierweiler Schütte Sicherheitsverschluss fuer flaschen und behaelter
DE8421870U1 (de) * 1984-07-21 1984-09-13 VAW Folien-Verarbeitung GmbH, 5012 Bedburg Sicherheitsverschluss fuer Flaschen und Behaelter
DE3642998C1 (de) * 1986-12-17 1988-05-19 Haist Verpackung Beratung Tiefgezogener Drehverschluss aus Aluminium fuer unter Innendruck stehende Glasflaschen sowie Tiefziehvorrichtung fuer einen Verschliesskopf zum Herstellen derartiger Drehverschluesse

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994013549A1 (fr) * 1992-12-08 1994-06-23 Wilhelm Wazel Systeme de fermeture, notamment pour bouteilles

Also Published As

Publication number Publication date
ATE159489T1 (de) 1997-11-15
EP0619242A1 (fr) 1994-10-12
DE59404382D1 (de) 1997-11-27
DE9305416U1 (de) 1993-12-23

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