EP0067650A1 - Verschluss mit Originalitätssicherung - Google Patents

Verschluss mit Originalitätssicherung Download PDF

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Publication number
EP0067650A1
EP0067650A1 EP82302952A EP82302952A EP0067650A1 EP 0067650 A1 EP0067650 A1 EP 0067650A1 EP 82302952 A EP82302952 A EP 82302952A EP 82302952 A EP82302952 A EP 82302952A EP 0067650 A1 EP0067650 A1 EP 0067650A1
Authority
EP
European Patent Office
Prior art keywords
closure
sidewall
container
thread
inside surface
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
EP82302952A
Other languages
English (en)
French (fr)
Other versions
EP0067650B1 (de
Inventor
Efrem M. Ostrowsky
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.)
Tredegar Molded Products Co
Original Assignee
Tredegar Molded Products Co
Ethyl Products Co
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27402412&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0067650(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from US06/271,776 external-priority patent/US4427126A/en
Priority claimed from US06/271,775 external-priority patent/US4369889A/en
Priority claimed from US06/284,230 external-priority patent/US4382521A/en
Application filed by Tredegar Molded Products Co, Ethyl Products Co filed Critical Tredegar Molded Products Co
Priority to DE8484115976T priority Critical patent/DE3278764D1/de
Publication of EP0067650A1 publication Critical patent/EP0067650A1/de
Application granted granted Critical
Publication of EP0067650B1 publication Critical patent/EP0067650B1/de
Expired 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
    • B65D41/0435—Threaded or like caps or cap-like covers secured by rotation with separate sealing elements
    • B65D41/045—Discs
    • 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
    • B65D41/3461—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt the tamper element being retracted by heat or by heat and pressure
    • B65D41/3466—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt the tamper element being retracted by heat or by heat and pressure and 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
    • 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

Definitions

  • This invention relates to a tamper-indicating closure suitable for use in packaging carbonated beverages.
  • thermoplastic closures Due to the economy of manufacture and availability of raw material, the utilization of thermoplastic closures in packaging carbonated beverages is becoming more popular. To be commercially acceptable, the closure must have tamperproof qualities. As understood in the closure art, the term "tamperproof” also has the meaning of tamper-indicating qualities.
  • a highly successful tamperproof system for use on thermoplastic closures is the one disclosed in U.S. Patent Specification 4,206,851. This system utilizes a fracturable band which can be heat shrunk into an interfering fit with a container flange. The fracturable band is carried by a plurality of non-fracturable ribs attached to the lowermost end of the closure sidewall.
  • either the container and/or the closure must be designed to prevent premature release of the closure from the container.
  • This premature release phenomenon is most often experienced as the user turns the closure to begin its removal from the container.
  • the closure As the closure is turned, it moves axially upward thus breaking the seal between the top of the closure and the top of the container.
  • pressurized gas from the container enters between the sidewall of the closure and the container, tending to bulge the closure sidewall outwardly.
  • the closure threads are pulled away from engagement with the container threads and the connection between the container and closure is tenuous at best. If the gas is under sufficient pressure, the closure will be released from the container since the container-closure thread engagement is insufficient to contain the pressurized gas. This release is oftentimes with great force thereby presenting danger to the user.
  • thermoplastics materials enables the solution of these problems.
  • Thermoplastic closures can be designed so that a vent groove is cut on the inside surface of the closure sidewall across the closure threads. See U.S. Patent Specification 3,888,347.
  • the width of the vent groove and the number of vent grooves utilized can be varied to provide the necessary venting rate for the conditions expected. Further, with this type of system, there will be no dirt entrapping openings exposed to the outside of the closure. (The use of such a groove on a metal closure is not practical as the metal closures used in packaging carbonated beverages are almost all roll formed on the container from a blank.)
  • the degree and incidence of shrinkage is increased when the lower portion of the sidewall is thinned out so that it flares outwardly from the container flange.
  • the flare configuration is desirable since it aids in placement of the cap on the container as it goes through the capping line.
  • the flaring is also desirable as it provides a space between the closure sidewall and the container flange.
  • ⁇ thinning out the lower portion of the closure sidewall, this thinned sidewall portion will more likely reach its heat shrinking temperature if it receives stray heat from the source used to apply heat to the tamperproof band.
  • thermoplastics material closure having a heat-shrinkable tamperproof band and a pressurized gas venting system which are compatible with each other.
  • the invention provides a thermoplastics material closure for fitment to a container and comprising a top wall, an annular sidewall downwardly depending from said top wall and with a closure thread about the inside surface thereof and stand-off protuberances about the lower inside surface of said sidewall adapted, in use, to aid in keeping said sidewall from making contact with the container, sealing means above said closure thread adapted, in use, to achieve a gas-tight seal with the container, gas venting means for venting gas from the container to atmosphere subsequent to loss of a gas-tight seal upon loosening of said closure from fitment to the container, and heat-shrinkable tamper-indicating means attached to the bottom of said sidewall.
  • the location of the vent slot in the closure presents problems itself.
  • the use of the vent slot requires a recessed cut in the closure sidewall across the closure thread, with the result being that the closure sidewall is thinner at the vent slot and unsupported by a continuous thread.
  • the weakened sidewall Upon tightening the closure to the container, the weakened sidewall will expand outwardly as, in its weakened configuration, it cannot support the forces applied on it by the engagement of the container and closure threads.
  • the pressurized gas can cause the weakened closure sidewall to expand. Both the closure expansion realized upon tightening and the closure expansion caused by the pressurized gas jeopardize the closure-container thread engagement.
  • a rigidifying structure is also provided to enhance the hoop strength of the closure sidewall at the vent groove(s).
  • the structure is located at each point of traverse by the venting groove with the closure thread. This structure is dimensioned so that its perpendicular height, measured from the sidewall, is less than the perpendicular height of the closure thread, also measured from the inside surface of the sidewall.
  • venting can be accomplished, for example, by using a vertical vent groove or slot on the container or closure because with the vent slot the gas is not trapped between the closure sidewall and the container neck, there is still a chance for blow-off if the thread engagement is lessened too quickly as sufficient time will not have passed for the pressurized gas to complete its venting. For some closures, complete unscrewing of the closure from the container can take as little as one-half of a second. Clearly, in this amount of time, venting has only started and pressure in the container is still high.
  • the lower portion of the inside surface of the closure sidewall is preferably flared slightly outward.
  • tamper-indicating means preferably a fracturable, heat-shrinkable, tamperproof band which is attached to the closure sidewall by means of a plurality of non-fracturable ribs.
  • annular bead which operates as a heat sink.
  • a plurality of stand-off protuberances are positioned about the inside surface of the closure sidewall.
  • these protuberances will take the form of vertical ribs.
  • the closure of this invention has a top wall 12 and a downwardly'depending annular sidewall 14. Nested against the inside surface of top wall 12 is a liner 22. Liner keepers 24 are utilized to hold liner 22 in a position adjacent the inside surface of top wall 12. Liner 22 is utilized to effect a gas-tight seal with the top lip of the container neck. Other sealing systems may be utilized with the closure of this invention. The systems utilized, whether they be liner systems or liner- less systems, must fulfill the requirement that they be capable of effecting a gas-tight seal under the pressure expected in the package. About the inside surface of sidewall 14 there is provided a helical thread 20. Helical thread 20 is dimensioned to cooperate with container helical thread 42, shown in Figure 3, to effect fitment of closure 10 to the container.
  • vent groove 26 Recessed in the inside surface of sidewall 14 is vent groove 26. As can be seen in Figure 2, vent groove 26 intersects closure thread 20. For the embodiments shown in the drawings, a single vent groove is utilized. However, it is to be understood that more than one vent groove may be used. The width and depth of vent groove 26 should be such that sufficient passageway is provided for the pressurized gas so that it may be vented safely to the atmosphere within a period of time that is shorter than the time necessary for removal of closure 10 from the container by the user.
  • rigidifying structure 34 Traversing vent groove 26 at each point of its intersection with closure thread 20 is rigidifying structure 34.
  • rigidifying structure 34 has a cross sectional shape resembling a truncated pyramid. Whatever the form of rigidifying structure 34, it cannot have a height, measured from the inside surface of sidewall 14, greater than the height of closure thread 20, also measured from the inside surface of sidewall 14. However, the height of rigidifying structure 34 should not be so small that it is not able to achieve its required enhancement of sidewall hoop strength. Determination of the height of rigidifying structure 34 will be dependent on several factors, i.e.
  • a useful closure is one made of polypropylene having a vent groove width of about 1/16 inch and depth of .005 to .015 inches, a sidewall thickness of .035 to .040 inches, a closure thread traversing approximately 480 degrees having conventional thread engagement and a rigidifying structure height of about 2/3 of thread height.:
  • the sizing of rigidifying structure 34 is empirically determined by observation and experimentation, both of which are well within the ability of those skilled in the art having the disclosure of this invention before them,
  • annular boss 30 serves the function of providing a heat sink for absorption of "stray heat" from the heat shrinking operation of band 16.
  • the configuration and size of annular boss 30 is not critical so long as the heat sink function is achieved and thus the lowermost portion of sidewall 14 does not reach a temperature which would cause its shrinkage.
  • protuberances 32 are provided. These protuberances prevent any tendency of the lower portion of sidewall 14 to move towards the container.
  • these protuberances are vertical ribs grouped in pairs and spaced each pair every ninety degrees. In fact, it has been found desirable to dimension ribs 32 so that when the closure is fitted to the container, sidewall 14 is slightly deformed outwardly from the container. It is to be understood that other forms of protuberances may be utilized such as beads and the like.
  • ribs 18 Extending downwardly from the lowermost edge of sidewall 14 are a plurality of non-fracturable ribs 18. These ribs are for carrying heat shrinkable tamper-indicating band 16. Band 16 is provided with at least one weakened portion so that this portion can fracture upon stress applied to the band. This fracture of the band is a clear indication to the user that the closure has been tampered with.
  • closure 10 is shown fitted to a container.
  • container neck 40 has closure 10 fitted thereto by the cooperation of container threads 42 and closure threads 20.
  • heat shrinkable bead 16 has heat shrunken so that it has moved to a position of interference with container flange 48.
  • unscrewing of closure 10 results in upward axial movement of the closure, which movement forces the fracture of band 16 as it is not able to follow this axial movement without fracturing due to its interference with container flange 48
  • the spacing 50 between the lowermost edge of sidewall 14 and container flange 48 has been maintained since no shrinkage of sidewall 14 at its lowermost portion has occurred.
  • ribs 32 will act to accomplish this function.
  • a particularly useful closure of this invention is one made of polypropylene. However, it is to be understood that other materials may be utilized such as polyethylene terephthalate, polyvinyl chloride, high density polyethylene, and the like.
  • the closure of this invention may be made by any well known injection molding techniques.
  • annular boss 30 Illustrative of the benefits realised when utilizing an annular boss 30 in this invention is the fact that a polypropylene closure with the features of this invention and such a boss can be passed through a 52 inch long slotted forced-air heater utilizing 4040C. air with a passage time of two seconds and a package rotation of 3-1/4 revolutions per pass without shrinkage of the lower portion of sidewall 14.
  • annular boss 30 had a thickness measured from the inside wall to the outside wall of 0.037 inches. Without annular boss 30, the thickness would normally be 0.028 inches for this portion of sidewall 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
EP19820302952 1981-06-08 1982-06-08 Verschluss mit Originalitätssicherung Expired EP0067650B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE8484115976T DE3278764D1 (en) 1981-06-08 1982-06-08 Tamper-indicating closure

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US271776 1981-06-08
US06/271,776 US4427126A (en) 1981-06-08 1981-06-08 Vented closure
US271775 1981-06-08
US06/271,775 US4369889A (en) 1981-06-08 1981-06-08 Tamperproof closure
US06/284,230 US4382521A (en) 1981-07-17 1981-07-17 Vented closure
US284230 1981-07-17

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP84115976.7 Division-Into 1984-12-20

Publications (2)

Publication Number Publication Date
EP0067650A1 true EP0067650A1 (de) 1982-12-22
EP0067650B1 EP0067650B1 (de) 1986-08-20

Family

ID=27402412

Family Applications (2)

Application Number Title Priority Date Filing Date
EP19840115976 Expired EP0149198B1 (de) 1981-06-08 1982-06-08 Verschluss mit Originalitätssicherung
EP19820302952 Expired EP0067650B1 (de) 1981-06-08 1982-06-08 Verschluss mit Originalitätssicherung

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP19840115976 Expired EP0149198B1 (de) 1981-06-08 1982-06-08 Verschluss mit Originalitätssicherung

Country Status (5)

Country Link
EP (2) EP0149198B1 (de)
AU (1) AU8466382A (de)
CA (1) CA1195290A (de)
DE (1) DE3272712D1 (de)
NZ (1) NZ200879A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984004736A1 (en) * 1983-06-02 1984-12-06 Ernst Wiedmer Anti-tamper band for container closure
WO1986002335A1 (en) * 1984-10-09 1986-04-24 Walter Wiedmer Ag Plastikform Synthetic closure for container with guarantee ring
EP0186600A2 (de) * 1984-12-24 1986-07-02 SANDHAUS, Jeffrey J. Gesicherte Verschlussanordnung
WO1992019510A1 (de) * 1991-04-25 1992-11-12 Alcoa Deutschland Gmbh Verpackungswerke Verschluss mit überdrucksicherung
WO1999058410A1 (fr) * 1998-05-13 1999-11-18 Crown Cork & Seal Technologies Corporation Bouchon a vis presentant une gorge destinee a recevoir un joint et moule pour realiser un tel bouchon

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4723685A (en) * 1986-12-19 1988-02-09 Owens-Illinois Closure Inc. Lined closure made by the unscrewing process
US5197620A (en) * 1992-04-27 1993-03-30 Owens-Illinois Closure Inc. Venting closure
GB2277079A (en) * 1993-04-17 1994-10-19 Nicholas Low Safety bottle top
US7073375B2 (en) 2004-07-02 2006-07-11 Honeywell International Inc. Exhaust back pressure sensor using absolute micromachined pressure sense die
US8584876B2 (en) 2007-07-05 2013-11-19 Kraft Foods Group Brands Llc Food containers adapted for accommodating pressure changes using skip seals and methods of manufacture
DE102009044896B3 (de) * 2009-12-15 2011-05-26 Kunststofftechnik Waidhofen An Der Thaya Gmbh Verschlusskappe zum Verschließen eines Behältnisses
CN110615174B (zh) * 2018-06-19 2022-05-06 义乌市易开盖实业公司 具有安全提醒结构的包装容器

Citations (7)

* 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
FR2348114A1 (fr) * 1976-04-12 1977-11-10 Consumers Glass Co Ltd Bouchon de bouteille du type filete
GB2029808A (en) * 1978-09-15 1980-03-26 Metal Closures Ltd Closing Containers having Screw-threaded Necks
EP0009854A1 (de) * 1978-09-15 1980-04-16 Metal Closures Limited Verschlusskappe und Verschlusskappe mit Behälter
GB2062593A (en) * 1979-10-22 1981-05-28 Ethyl Prod Tamperproof closure
EP0060218A2 (de) * 1981-03-10 1982-09-15 Albert Obrist AG Drehverschluss-anordnung zum Verschliessen von unter Innendruck stehenden Behältern

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3612325A (en) * 1968-06-19 1971-10-12 Dover Molded Products Co Plastic screwcap with rotatable washer
NL7810527A (nl) * 1978-10-20 1980-04-22 Leer Koninklijke Emballage Schroefkap met borgrand.
US4206852A (en) * 1979-01-26 1980-06-10 Aluminum Company Of America Linerless closure for pressurized container

Patent Citations (7)

* 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
FR2348114A1 (fr) * 1976-04-12 1977-11-10 Consumers Glass Co Ltd Bouchon de bouteille du type filete
GB2029808A (en) * 1978-09-15 1980-03-26 Metal Closures Ltd Closing Containers having Screw-threaded Necks
EP0009854A1 (de) * 1978-09-15 1980-04-16 Metal Closures Limited Verschlusskappe und Verschlusskappe mit Behälter
GB2062593A (en) * 1979-10-22 1981-05-28 Ethyl Prod Tamperproof closure
EP0060218A2 (de) * 1981-03-10 1982-09-15 Albert Obrist AG Drehverschluss-anordnung zum Verschliessen von unter Innendruck stehenden Behältern

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984004736A1 (en) * 1983-06-02 1984-12-06 Ernst Wiedmer Anti-tamper band for container closure
WO1986002335A1 (en) * 1984-10-09 1986-04-24 Walter Wiedmer Ag Plastikform Synthetic closure for container with guarantee ring
US4699284A (en) * 1984-10-09 1987-10-13 Walter Wiedmer Ag Plastikform Synthetic container closure with guarantee ring
EP0186600A2 (de) * 1984-12-24 1986-07-02 SANDHAUS, Jeffrey J. Gesicherte Verschlussanordnung
EP0186600A3 (de) * 1984-12-24 1988-02-03 SANDHAUS, Jeffrey J. Gesicherte Verschlussanordnung
WO1992019510A1 (de) * 1991-04-25 1992-11-12 Alcoa Deutschland Gmbh Verpackungswerke Verschluss mit überdrucksicherung
DE4113428C3 (de) * 1991-04-25 1999-08-05 Alcoa Gmbh Verpackwerke Schraubverschluß
WO1999058410A1 (fr) * 1998-05-13 1999-11-18 Crown Cork & Seal Technologies Corporation Bouchon a vis presentant une gorge destinee a recevoir un joint et moule pour realiser un tel bouchon
FR2778641A1 (fr) * 1998-05-13 1999-11-19 Crown Cork & Seal Tech Corp Bouchon a vis presentant une gorge destinee a recevoir un joint et moule pour realiser un tel bouchon

Also Published As

Publication number Publication date
NZ200879A (en) 1985-07-12
EP0149198A3 (en) 1985-10-30
CA1195290A (en) 1985-10-15
EP0067650B1 (de) 1986-08-20
AU8466382A (en) 1982-12-16
EP0149198B1 (de) 1988-07-13
EP0149198A2 (de) 1985-07-24
DE3272712D1 (en) 1986-09-25

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