EP1105318B1 - Capuchon de fermeture - Google Patents

Capuchon de fermeture Download PDF

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Publication number
EP1105318B1
EP1105318B1 EP99944396A EP99944396A EP1105318B1 EP 1105318 B1 EP1105318 B1 EP 1105318B1 EP 99944396 A EP99944396 A EP 99944396A EP 99944396 A EP99944396 A EP 99944396A EP 1105318 B1 EP1105318 B1 EP 1105318B1
Authority
EP
European Patent Office
Prior art keywords
cap
abutment
closure cap
sealing
wall
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
EP99944396A
Other languages
German (de)
English (en)
Other versions
EP1105318A1 (fr
Inventor
Georg Pfefferkorn
Udo Bösl
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
Original Assignee
Crown Cork and Seal Technologies Corp
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 and Seal Technologies Corp filed Critical Crown Cork and Seal Technologies Corp
Priority to EP99944396A priority Critical patent/EP1105318B1/fr
Publication of EP1105318A1 publication Critical patent/EP1105318A1/fr
Application granted granted Critical
Publication of EP1105318B1 publication Critical patent/EP1105318B1/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
    • 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
    • B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/04—Threaded or like caps or cap-like covers secured by rotation
    • B65D41/0407—Threaded or like caps or cap-like covers secured by rotation with integral sealing means
    • B65D41/0414—Threaded or like caps or cap-like covers secured by rotation with integral sealing means formed by a plug, collar, flange, rib or the like contacting the internal surface of a container neck
    • B65D41/0421—Threaded or like caps or cap-like covers secured by rotation with integral sealing means formed by a plug, collar, flange, rib or the like contacting the internal surface of a container neck and combined with integral sealing means contacting other surfaces of a container neck
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S215/00—Bottles and jars
    • Y10S215/01—Fins
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S215/00—Bottles and jars
    • Y10S215/902—Vent

Definitions

  • the invention relates to a closure cap with the features of the preamble of claim 1 (see for example the Document WO-A-95/21095).
  • Caps made of plastic material are in one Variety for closing containers, for example Beverage bottles used.
  • a closure cap to be provided with a sealing insert and at the same time to define the screw-on position of the sealing cap. If the internal pressure is increased, the sealing washer should be compressed and act as a pressure relief valve.
  • EP-A-464 384 discloses a self-venting bottle cap known, due to weaknesses in the top plate the sealing effect is canceled with increased internal pressure shall be.
  • DE-A-196 13 830 describes a self-venting closure known in which the cap base is weakened.
  • the Weakening leads to the fact that the The base of the cap is arched outwards (so-called doming) and that it is formed in one piece with the cap base Inner seal is relieved of pressure.
  • the cap should be simple and be economical to produce and with conventional screwing devices be screwable.
  • the cap essentially consists of a cap base and a cap wall. There is a circumferential one on the cap bottom Internal seal provided. The seal is with a Seal line, which against the inside of the container mouth can be pressed and achieves a sealing effect.
  • the cap can also be on the inside of the cap wall arranged retaining elements, for example one Screw thread, are held on the container mouth.
  • the closure cap has a first stop, which arises approximately from the bottom of the cap.
  • a second stop to limit the screwing movement of the cap is arranged.
  • the second stop can start with, for example Engage threads on the container mouth and so the Limit unscrewing movement.
  • the second stop is advantageous formed as a circumferential ring, the stop plane runs approximately perpendicular to the axis of the closure cap.
  • the cap wall is also with a deformable wall section Mistake.
  • the deformable wall section is between arranged the first and the second stop.
  • the Deformability can be achieved by weakening the wall thickness in the Area of the wall section can be achieved, for example through a recess on the inside of the cap wall.
  • the inventors of the present invention have found that a weakening of the closure cap in the area of the Cap wall compared to known weaknesses in the cap base has surprising advantages.
  • An increased internal pressure in the container closed by the cap not primarily a curvature of the cap base, but an axial displacement of the cap base.
  • the So movement is essentially linear. This means that any seals on the outside or on the front the container mouth due to the axial translation movement of the cap bottom also out of sealing engagement devices. Of course, there can still be a specific one Curvature occur.
  • the axial distance between the first and the second stop on the one hand and the depth of penetration of the sealing line on the other hand are selected such that the sealing line disengages from the inside of the container mouth at a predetermined internal pressure.
  • This minimum pressure varies depending on the contents in the container. In the case of fruit juices it is around 2 bar, in the case of beverages with a low CO 2 content it is 5 bar and in the case of a content with 4 vol.% CO 2 it is above 8 bar.
  • the degree of deformability of the wall section is also selected accordingly.
  • the first stop engages when screwed on the top of the tank mouth before the second stop engages with the start of the thread.
  • the penetration depth of the sealing line denotes the axial one Distance of the sealing line from the first stop in deformed Condition or distance of the sealing line from the top the container mouth.
  • the deformability is set for normal conditions, i.e. for temperatures in the range of 15 - 35 ° C. If the outside temperature If these values are exceeded, the deformability larger (softening of the plastic material). The venting function is therefore favored at a higher temperature.
  • the two stops serve for precisely defined pretensioning the weakening zone in the cap wall.
  • the inner seal also advantageously points to the Ventilation cutouts on the side facing the cap apron.
  • the ventilation cutouts are below the sealing line arranged.
  • the inner seal is advantageous as a so-called Olive seal trained. This means that the sealing line a maximum outer diameter of the inner seal defined and spaced from the inside of the cap base is arranged.
  • Such olive seals have the advantage in Seal inside the container mouth, where normally one to find a precisely defined sealing surface without damage is.
  • the disadvantage of such olive seals is that they already seal due to the preload when the Sealing cap is not in the attached position, but axially slightly above the sealing position. thanks to the Ventilation recesses, which are advantageous immediately below start the sealing line, the sealing effect is canceled, as soon as the sealing line outside the container mouth lies. An extension of the sealing effect due to a shift the sealing line over which is tapered down This prevents a tapering inner seal.
  • the cap can also with a circumferential Be sealing bead provided against the outside of the Container mouth can be pressed.
  • the sealing bead is axial arranged between the first and second stop.
  • the closure cap is also advantageous with hold-open elements Mistake.
  • Such hold-open elements can, for example above the sealing line on the cap wall facing surface of the inner seal may be provided.
  • the Keep-open elements prevent the sealing line from shifting. If there is still doming of the internal pressure If the bottom of the cap comes, the hold-open elements are supported on the container mouth, so the location of the inner seal with respect to the container mouth essentially only is changed by translation. Can keep open of course on the other sealing elements, in particular on the second stop acting as a seal or on the optional against the outside of the container annular bead.
  • Figure 1 shows a cap 1, which essentially consists of a cap base 2 and a cap wall 3.
  • the Cap wall 3 is provided with a screw thread 6, with which the cap 1 on a container mouth 20th can be screwed on.
  • the Inner seal 4 On the inside of the cap base 2 there is an inner seal 4 arranged in the form of a circumferential sealing lip.
  • the Inner seal 4 is designed as a so-called olive seal.
  • the inner seal 4 has a sealing line 5, which can be pressed against the inside of a container mouth.
  • the sealing line 5 is at a distance from the inside of the cap base 2 arranged and defines the maximum outer diameter the surface 10 of the cap apron 3 facing the Inner seal 4.
  • the inner seal 4 is below the sealing line 5 with ventilation cutouts 11 provided which on the surface 10 are arranged.
  • the first stop 8 is a circumferential bead trained who also has a sealing function.
  • a second stop 7 is located above the end of the thread 6 on the inside of the cap wall 3 above the thread 6 arranged.
  • the stop 7 has a stop plane that runs approximately perpendicular to the axis of the closure cap.
  • the Stops 7, 8 are predeterminable in the axial direction Distance d spaced.
  • the cap wall 3 is provided with a deformable wall area 9.
  • Open hold elements 13 are arranged, which ensure that the sealing line 5 of the inner seal 4 does not shift, i.e. that the inner seal 4 only in the area of the sealing line 5 can be sealed against the inside of the container mouth.
  • the outside of the cap apron 3 is also with a Corrugation or provided with ribs 14, which the cap wall 3 below the weakening zone 9 sufficient strength and give good grip properties.
  • the cap 1 can also with a guarantee tape 15 and be provided with vertical ventilation slats 16, which interrupt the thread 6.
  • a guarantee tape 15 and be provided with vertical ventilation slats 16, which interrupt the thread 6.
  • vertical ventilation slats 16 which interrupt the thread 6.
  • FIG 2 the sealing part of the closure cap is according to Figure 1 is shown enlarged. If the cap 1 is screwed onto a container mouth 20, comes first the first stop 8 with the end face 23 of the container mouth 20 engaged. By further screwing on the Cap wall 3 in the region of the deformable wall section 9 deformed axially until the second stop 7 with the Thread start 22 of the container mouth 20 engages. In the fully applied state is the deformable one Wall area 9 biased to a precisely predetermined value.
  • a circumferential sealing bead 12 seals against the Outside 24 of the container mouth 20.
  • the container mouth 20 On the inside 21 the container mouth 20 is the inner seal 4 with the Sealing line 5 sealing.
  • the sealing line 5 has a through relative position to the second stop 7 predetermined penetration depth t in the tank mouth.
  • the cap base 2 becomes axial Direction A shifted up (see Figure 3).
  • the axial Displacement of the cap base 2 is due to the deformable Wall section 9 favors.
  • the second stop 7 remains thereby engaging with the thread beginning 22 of the container mouth 20.
  • the first stop 8 is from the end face 23 of the Container mouth 20 lifted and the inner seal 4 slides along the inside 21 of the container mouth 20 in the direction of the arrow A upwards so that the sealing line 5 is disengaged with the inside 21.
  • An increased internal pressure can therefore compensated for by the ventilation recesses 11 become.
  • Between the second stop 7 and the beginning of the thread 22 is due to the thread pitch only on a short Circumferential section a sealing contact.
  • the reduction of the internal pressure is also through the ventilation slots shown in Figure 1 16 favors.
  • the axial displacement of the cap base 2 also the pressed against the outside 24 of the container mouth 20 Bead 12 relieved of pressure, so that ventilation is possible.
  • the ventilation cutouts 11 are of particular advantage, because the inner seal 4 is preloaded into the container mouth is introduced and the sealing line 5 deep in the Container mouth is arranged. Because of the ventilation cutouts 11 ventilation takes place as soon as the sealing line 5 out of engagement with the inner surface 21 of the container mouth occurs. Without ventilation cutouts 11 would Surface 10 of the inner seal 4 due to the bias also below the sealing line 5 during the axial displacement still in sealing engagement with the inside 21 of the Container mouth 20 remain.
  • the cap 1 is schematically in the Shown bottom view. Threads, stops and the outside Sealing bead 12 are omitted for simplification.
  • the ventilation cutouts 11 and the hold-open elements 13 are arranged regularly over the circumference of the inner seal 4.
  • the essence of the invention is the cap bottom 2 without Form weaknesses so that doming of the cap base, i.e. an outward curvature is made difficult or reduced. Instead, a deformable wall section 9 is in the area the cap wall 3 provided. This weakening in the area of Cap wall 3 allows axial movement of the cap base with increased internal pressure.
  • the representation shown in Figure 3 is exaggerated to illustrate the gas release process executed. In reality, the cap bottom lifts up increased internal pressure only by a small amount. Once the Internal pressure decreases again, the cap bottom 2 lowers again and the sealing cap 1 seals again. It has shown that with such arrangements, the internal pressure in the Containers on one sufficient for several weeks can be kept low. There are a lot of them of successive venting processes.
  • Essential for the degree of preload of the weakening zone 9 is the distance d between the first stop 7 and the second stop 8 compared to the axial distance d between the upper edge of the thread start 22 and the end face 23 of the container mouth 20.
  • the distance between the stops 7, 8 is 1.3 to 1.5 mm in the exemplary embodiment.
  • the Distance between the top of the thread start 22 and Front side 23 of the container mouth 20 is 1.7 mm.
  • the depth of penetration t of the sealing line 5 is depending on the content of the Container 0.8 to 1.0 mm.
  • the venting recesses 11 are at a distance of 0.2 to 0.3 mm below the sealing line 5 on the surface 10 of the Inner seal 4 arranged.
  • the ventilation cutouts 11 extend towards the lower end of the inner seal 4 at least over that part of the surface 10 of the inner seal 4, which when screwing or unscrewing the cap 1 in engagement with the inside 21 of the The container mouth can stand.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Cosmetics (AREA)
  • Road Signs Or Road Markings (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)
  • Glass Compositions (AREA)

Claims (8)

  1. Couvercle (1) avec un fond (2) et une paroi (3), comprenant
       un joint d'étanchéité intérieur circulaire (4) qui dépasse du fond de couvercle (2) et qui présente une ligne d'étanchéité (5) apte à venir en prise, quand le couvercle est vissé, avec le côté intérieur (21) d'une ouverture de récipient (20),
       et des éléments de retenue (6) qui sont disposés sur la paroi de couvercle (3) pour retenir le couvercle (1) sur ladite ouverture de récipient (20),
       le couvercle (1) comportant une première butée (8) qui dépasse du fond (2), et
       le couvercle (1) comportant une seconde butée (7) qui est disposée axialement entre les éléments de retenue (6) et la première butée (8) pour limiter le mouvement de vissage,
       caractérisé en ce que la paroi de couvercle (3) est pourvue d'une section déformable (9) qui est disposée axialement entre la première butée (8) et la seconde butée (7), la distance (d) entre la première butée (8) et la seconde butée (7), la profondeur de pénétration (t) de la ligne d'étanchéité (5) et le degré de déformabilité de ladite section de paroi étant choisis pour que la ligne d'étanchéité (5), en présence d'une pression interne apte à être prédéfinie, puisse cesser d'être en prise d'étanchéité avec le côté intérieur (21) de l'ouverture de récipient.
  2. Couvercle selon la revendication 1, caractérisé en ce que la première butée (8) et la seconde butée (7) sont disposées de telle sorte que la seconde butée (7) puisse venir en prise avec le début (22) du filetage de l'ouverture de récipient (20) après que la première butée (8) est venue en prise avec le côté frontal (23) de l'ouverture de récipient (20).
  3. Couvercle selon la revendication 1 ou 2, caractérisé en ce que le joint d'étanchéité intérieur (4) présente, sur sa surface (10) tournée vers la paroi de couvercle, au moins un évidement d'évacuation d'air (11) disposé au-dessous de la ligne d'étanchéité (5).
  4. Couvercle selon la revendication 3, caractérisé en ce que l'évidement d'évacuation d'air (11) commence juste au-dessous de la ligne d'étanchéité (5) et s'étend en direction de l'extrémité du joint d'étanchéité intérieur (4).
  5. Couvercle selon l'une des revendications 1 à 4, caractérisé en ce qu'il comporte un renflement d'étanchéité circulaire (12) qui est disposé axialement entre la première butée (8) et la seconde butée (7) et qui est apte à être pressé contre le côté extérieur (24) de l'ouverture de récipient (20).
  6. Couvercle selon l'une des revendications 1 à 5, caractérisé en ce que la surface (10) du joint d'étanchéité intérieur (4) tournée vers la jupe de couvercle (3) comporte au moins un élément de maintien d'ouverture (13) qui est disposé axialement au-dessus de la ligne d'étanchéité (5).
  7. Couvercle selon l'une des revendications 1 à 6, caractérisé en ce que la section de paroi déformable (9) est définie par une réduction de l'épaisseur de paroi, de préférence par un creux sur le côté intérieur de la paroi de couvercle (3).
  8. Emballage comportant un couvercle selon l'une des revendications 1 à 7 et un récipient avec une ouverture à filetage, l'ouverture de récipient présentant un côté frontal (23) avec lequel la première butée (8) peut venir en prise, le filetage présentant un début (22) avec lequel la seconde butée (7) du couvercle peut venir en prise, et la distance axiale (d') entre le côté frontal (23) et le début (22) du filetage étant supérieure à la distance axiale (d) entre la première butée (8) et la seconde butée (7).
EP99944396A 1998-08-22 1999-08-14 Capuchon de fermeture Expired - Lifetime EP1105318B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP99944396A EP1105318B1 (fr) 1998-08-22 1999-08-14 Capuchon de fermeture

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP98115875 1998-08-22
EP98115875A EP0982234A1 (fr) 1998-08-22 1998-08-22 Capuchon de fermeture
EP99944396A EP1105318B1 (fr) 1998-08-22 1999-08-14 Capuchon de fermeture
PCT/EP1999/005970 WO2000010888A1 (fr) 1998-08-22 1999-08-14 Capuchon de fermeture

Publications (2)

Publication Number Publication Date
EP1105318A1 EP1105318A1 (fr) 2001-06-13
EP1105318B1 true EP1105318B1 (fr) 2002-10-02

Family

ID=8232499

Family Applications (2)

Application Number Title Priority Date Filing Date
EP98115875A Withdrawn EP0982234A1 (fr) 1998-08-22 1998-08-22 Capuchon de fermeture
EP99944396A Expired - Lifetime EP1105318B1 (fr) 1998-08-22 1999-08-14 Capuchon de fermeture

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP98115875A Withdrawn EP0982234A1 (fr) 1998-08-22 1998-08-22 Capuchon de fermeture

Country Status (8)

Country Link
US (1) US6679395B1 (fr)
EP (2) EP0982234A1 (fr)
AT (1) ATE225289T1 (fr)
AU (1) AU5734799A (fr)
BR (1) BR9913219A (fr)
DE (1) DE59902970D1 (fr)
ES (1) ES2185397T3 (fr)
WO (1) WO2000010888A1 (fr)

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ES2185397T3 (es) 2003-04-16
EP0982234A1 (fr) 2000-03-01
US6679395B1 (en) 2004-01-20
DE59902970D1 (de) 2002-11-07
WO2000010888A1 (fr) 2000-03-02
AU5734799A (en) 2000-03-14
EP1105318A1 (fr) 2001-06-13
ATE225289T1 (de) 2002-10-15
BR9913219A (pt) 2001-05-22

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