EP0060218A2 - Arrangement de fermeture rotative pour obturer des récipients se trouvant sous une pression interne - Google Patents

Arrangement de fermeture rotative pour obturer des récipients se trouvant sous une pression interne Download PDF

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Publication number
EP0060218A2
EP0060218A2 EP82810080A EP82810080A EP0060218A2 EP 0060218 A2 EP0060218 A2 EP 0060218A2 EP 82810080 A EP82810080 A EP 82810080A EP 82810080 A EP82810080 A EP 82810080A EP 0060218 A2 EP0060218 A2 EP 0060218A2
Authority
EP
European Patent Office
Prior art keywords
thread
cap
screw
cams
flanks
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.)
Ceased
Application number
EP82810080A
Other languages
German (de)
English (en)
Other versions
EP0060218A3 (fr
Inventor
Albert Obrist
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.)
Albert Obrist AG
Original Assignee
Albert Obrist 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 Albert Obrist AG filed Critical Albert Obrist AG
Publication of EP0060218A2 publication Critical patent/EP0060218A2/fr
Publication of EP0060218A3 publication Critical patent/EP0060218A3/fr
Ceased 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
    • B65D51/1672—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by manual actuation of the closure or other element
    • B65D51/1688—Venting occurring during initial closing or opening of the container, by means of a passage for the escape of gas between the closure and the lip of the container mouth, e.g. interrupted threads
    • 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

Definitions

  • the invention relates to a rotary closure for sealing internally pressurized containers with a container mouth with an external thread and with a screw cap with internal thread, which is engageable with at least one sealing portion sealingly with, the container mouth engages.
  • Such closures are used primarily on glass bottles for carbonated soft drinks. These bottles are essentially the standard bottles according to the MCA (The Soft Drink / Mineral Water Newspaper Stuttgart No. 4 of January 28, 1970), as are common today for soft drinks worldwide.
  • the bottles In order to avoid loss of liquid or gas, the bottles must be absolutely sealed by the screw caps in every position.
  • the screw caps have a sealing section, which e.g. can be designed as an olive-shaped inner seal. The danger with such inner seals is that when the closure cap is screwed on, the inside pressure can suddenly blow it away from the container mouth.
  • German patent no. 25 30 650 of the applicant has disclosed a twist lock in which the cap is prevented from breaking off by means of this a bead-like thickening of the thread at the beginning of the thread is held firmly in engagement until the inner seal comes out of engagement with the container opening. The gas pressure in the container can then be released via the thread before the screw cap is mechanically released from the container neck.
  • a reduction in the internal pressure via the thread means that it has corresponding tolerances and does not itself constitute a "sealing part": when the cap is screwed on, the threads of the screw cap are pressed against the lower flank of the external thread at the container mouth due to the internal pressure acting on the cap base pressed.
  • this can have the consequence that the thread seals itself in such a way that the gas pressure cannot decrease or cannot decrease sufficiently quickly. The danger of an abrupt detachment of the screw cap can thus occur at the last moment, particularly in the case of an unfavorable tolerance pairing.
  • a closure cap is already known from US Pat. No. 2,990,079, in which the internal thread is interrupted by a ventilation channel from the bottom of the cap to the lower edge of the screw cap.
  • the disadvantage of such a channel is that it can easily be blocked by dried-up liquid residues. It also complicates the manufacture of the injection molding tool.
  • the object of the invention to avoid the disadvantages of the known and, in particular, to provide a twist lock of the type mentioned at the outset, in which the locking cap is reliably prevented from being blown away by the internal pressure even in the case of an unfavorable tolerance pairing of the threads or in the case of blocked or glued threads .
  • This object is achieved according to the invention in that the internal thread of the screw cap and / or the external thread of the container mouth run on at least one side of the thread flanks in order to achieve an approximately vertical direction along the thread configuration the ventilation channel between the flanks has at least one distance cam.
  • a particularly advantageous ventilation results if the internal thread of the screw cap has three offset cams arranged on the flank side of the thread facing the cap base. Especially if the distance cams are offset by 12 0 0 from each other, this results in a uniform channel around the container mouth, which is only interrupted by the cams. Attaching the cams during the manufacturing process only requires simple milling on the corresponding part of the injection molding tool. The tool does not become more complicated and the demolding process does not require any additional work steps.
  • the venting channel is of the same width on both sides of the thread flank.
  • Figure 1 shows a container such as e.g. a glass bottle with a container mouth 1 with an external thread 2.
  • the container mouth is closed with a screw cap 3 made of thermoplastic material, which has an internal thread 4.
  • the screw thread can be single or multiple threads or, if need be, only consist of individual thread segments.
  • An inner seal 5 protruding into the container mouth is arranged on the cap base 8.
  • the sealing line can also be designed, for example, as a trumpet-shaped apron, which is bent over when the screw cap is screwed on for the first time.
  • a sealing lip 6 can be provided on the cap base 8 as an additional seal, which only acts when fully screwed on.
  • a spacer cam 7 is arranged on the upper flank side 9 of a thread of the screw cap.
  • the distance cam has a height h, which is approximately half of the backlash f. This results in a vent channel 11 on the screw thread between the internal thread 4 and the external thread 2, which has the same height 1/2 f on both the upper flank side 9 and the lower flank side 10.
  • the internal thread 4 of the screw cap has an oversize such that a diameter clearance d is present even without distance cams.
  • the cam 7 then only has the task of preventing the flank sides 9 from contacting.
  • the cam can also spread the internal thread in such a way that the diameter clearance d and thus the continuous channel only arise when the screw is screwed on.
  • the cam 7 is advantageously arranged on the upper flank side 9 of the internal thread 4, since the internal pressure on the screw cap 3 exerts a force in the direction k.
  • spacer cams 7 it is also readily possible to arrange spacer cams 7 on both the upper flank side 9 and the lower flank side 10. In certain applications, it is also conceivable that the spacer cams 7 are attached to the flanks of the external thread 2 of the container mouth 1.
  • the spacer cam 7 is directed inwards and reduces the core diameter of the internal thread.
  • the cam can have approximately the same length as in the example according to FIG. 2.
  • the distance cams 7 can be distributed over the entire thread length or only over one thread revolution. It is advantageous to arrange the spacer cams on the last threads that are still engaged when screwing on, since only in this critical phase is there a risk of detachment.
  • the core diameter and outside diameter on the external thread or on the internal thread are dimensioned and tolerated such that the screw connection always has a certain amount of play.
  • the screw connection is preferably designed as a round thread.
  • the spacer cams according to the invention on the thread flanks can, however, also easily be attached to a trapezoidal thread, a saw thread or to another thread type.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
EP82810080A 1981-03-10 1982-02-19 Arrangement de fermeture rotative pour obturer des récipients se trouvant sous une pression interne Ceased EP0060218A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH161181 1981-03-10
CH1611/81 1981-03-10

Publications (2)

Publication Number Publication Date
EP0060218A2 true EP0060218A2 (fr) 1982-09-15
EP0060218A3 EP0060218A3 (fr) 1983-01-26

Family

ID=4214480

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82810080A Ceased EP0060218A3 (fr) 1981-03-10 1982-02-19 Arrangement de fermeture rotative pour obturer des récipients se trouvant sous une pression interne

Country Status (1)

Country Link
EP (1) EP0060218A3 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0067650A1 (fr) * 1981-06-08 1982-12-22 Tredegar Molded Products Company Capsule de bouchage à bague de garantie
WO1993008093A1 (fr) * 1991-10-22 1993-04-29 Doemmling Juergen Recipient en matiere plastique
WO1997016356A1 (fr) * 1995-10-31 1997-05-09 Safety Cap System Ag Systeme de bouchage pour bouteille ou similaire
GB2383995A (en) * 2002-01-11 2003-07-16 Portola Packaging Ltd Closure with pressure release system
WO2020095070A1 (fr) 2018-11-09 2020-05-14 Polykeg S.R.L. Récipient et fermeture à canaux anti-projection
CN111655087A (zh) * 2017-12-04 2020-09-11 玛帕有限公司 饮用容器的饮用附接件和具有此附接件的饮用容器

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2990079A (en) * 1958-11-25 1961-06-27 Leo J Garvey Gas escape closure cap
US3888347A (en) * 1973-08-06 1975-06-10 Thomas Rollin Kramer Inflated containers for fluid pressurized balls
DE2614538A1 (de) * 1976-04-03 1977-10-06 Consumers Glass Co Ltd Verschluss fuer eine flasche
CA1147294A (fr) * 1978-09-15 1983-05-31 John H. Guest Recipients a goulots filetes, et capsules vissantes connexes
FR2447329A1 (fr) * 1979-01-24 1980-08-22 Carnaud Total Interplastic Dispositif de bouchage de recipients en matiere plastique

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0067650A1 (fr) * 1981-06-08 1982-12-22 Tredegar Molded Products Company Capsule de bouchage à bague de garantie
WO1993008093A1 (fr) * 1991-10-22 1993-04-29 Doemmling Juergen Recipient en matiere plastique
WO1997016356A1 (fr) * 1995-10-31 1997-05-09 Safety Cap System Ag Systeme de bouchage pour bouteille ou similaire
AU708953B2 (en) * 1995-10-31 1999-08-19 Safety Cap System Ag Closure means for a bottle or the like
US6021912A (en) * 1995-10-31 2000-02-08 Safety Cap Systems Ag Closure for a bottle or the like
CN1076304C (zh) * 1995-10-31 2001-12-19 安全盖系统公司 瓶或类似物品的封口
GB2383995A (en) * 2002-01-11 2003-07-16 Portola Packaging Ltd Closure with pressure release system
GB2383995B (en) * 2002-01-11 2005-12-07 Portola Packaging Ltd Closure with pressure release system
US7314146B2 (en) 2002-01-11 2008-01-01 Portola Packaging Limited Closure with pressure release system
CN111655087A (zh) * 2017-12-04 2020-09-11 玛帕有限公司 饮用容器的饮用附接件和具有此附接件的饮用容器
WO2020095070A1 (fr) 2018-11-09 2020-05-14 Polykeg S.R.L. Récipient et fermeture à canaux anti-projection
GB2578884A (en) * 2018-11-09 2020-06-03 Polykeg S R L Container and closure with anti-missiling channels
GB2578884B (en) * 2018-11-09 2022-06-01 Polykeg S R L Container and closure with anti-missiling channels

Also Published As

Publication number Publication date
EP0060218A3 (fr) 1983-01-26

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Inventor name: OBRIST, ALBERT