EP0272431A2 - Fermeture pour récipient en matière plastique apte à être stérilisé - Google Patents

Fermeture pour récipient en matière plastique apte à être stérilisé Download PDF

Info

Publication number
EP0272431A2
EP0272431A2 EP87116572A EP87116572A EP0272431A2 EP 0272431 A2 EP0272431 A2 EP 0272431A2 EP 87116572 A EP87116572 A EP 87116572A EP 87116572 A EP87116572 A EP 87116572A EP 0272431 A2 EP0272431 A2 EP 0272431A2
Authority
EP
European Patent Office
Prior art keywords
closure
container
disc
package
sealant
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
EP87116572A
Other languages
German (de)
English (en)
Other versions
EP0272431A3 (en
EP0272431B1 (fr
Inventor
Charles S. Ochs
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.)
Anchor Hocking LLC
Original Assignee
Anchor Hocking LLC
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 Anchor Hocking LLC filed Critical Anchor Hocking LLC
Publication of EP0272431A2 publication Critical patent/EP0272431A2/fr
Publication of EP0272431A3 publication Critical patent/EP0272431A3/en
Application granted granted Critical
Publication of EP0272431B1 publication Critical patent/EP0272431B1/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
    • B65D41/32—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
    • 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
    • B65D41/3404—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with ratchet-and-pawl mechanism between the container and the closure skirt or the tamper element
    • 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
    • B65D51/14—Rigid discs or spherical members adapted to be held in sealing engagement with mouth of container, e.g. closure plates for preserving jars
    • B65D51/145—Rigid discs or spherical members adapted to be held in sealing engagement with mouth of container, e.g. closure plates for preserving jars by means of an additional element connected directly to the container
    • 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
    • B65D2401/25—Non-metallic tear-off strips

Definitions

  • the present invention relates to an improved closure for sealing plastic containers and more particularly for a closure for sealing barrier plastic containers and for retaining the seal during a retorting of the sealed package.
  • the plastic containers are characterized by being relatively thin and having precision rims which facilitate cover attachment.
  • the closure of the present invention is also formed of a barrier plastic material similar to that of the con­tainer in some cases and of metal in other cases.
  • the closure is essentially a disc formed from the barrier plastic or metal sheets and having a clamp-like or curved edge coated with wide band of sealant for being held in tight gripping engagement with the container rim.
  • the clamp on the closure has a substantial gripping action itself due to its C-shape form and in this embodiment and in the more simple curved embodiments, a substantial portion of the sealant on the closure is held against the container rim in a broad annular band causing the seal to be relatively insensitive to vertical movements of the closure during a retorting process.
  • an object of the present invention is to provide an improved closure for plastic containers.
  • Another object of the present invention is to provide an improved closure particularly for barrier plastic con­tainers.
  • Another object of the present invention is to provide an improved resealable closure for barrier plastic containers which retains its seal during retorting.
  • plastic containers are often cup shaped or in the form of large mouth bottles and there is a need for an inexpensive and barrier sealing closure or disc.
  • the closure In addition to the requirements of low cost and barrier seals, the closure must also be of the type which retains its seal through the retorting or heat treating steps used in food packaging.
  • FIGS. 1 thru 4 illustrate a preferred embodiment of a composite closure 1 of this type. It consists of a barrier sealing disc 2 which is held in sealing position on the container 3 by a sealing ring 4.
  • a preferred disc 2 is illustrated in FIG. 3 which consists of a multi-layer extruded plastic material with the barrier layer 5 cut and stamped into the illustrated form comprising the disc-like inner portion 6 and a generally C-shaped outer sealing portion 7. The material is formed by a simultaneous extrusion of the outer and the barrier layers and an additional outer or bottom layer comprising a sealant such as plastisol-layer 8.
  • the plastic ring 4 has a skirt portion 9 and a generally C-shaped clamping portion 10 for engaging the outward C-shaped sealing portion 7 of the disc 2.
  • Suitable container engaging threads 11 are provided on the inner surface of the skirt 9 and preferably a tamper indicating strip 12 is provided at the lower edge of the ring skirt 9.
  • This tamper strip 12 is of the known type whose teeth 13 engage ratchet teeth 14 on the container 3.
  • the tamper indicating strip 12 is torn from the remaining portion of the ring 4 upon closure removal using a tear tab 15.
  • a line of weakness 16 is provided between the tamper indicating strip 12 and the remaining portion of the skirt 9.
  • the radially outer edge of the disc 2 has the above described C shape as illustrated at 7.
  • This shaping of the disc 2 edge provides for elongated and tightly gripped annular contact areas on the inner and the outer surfaces of the container 3 rim 17, which preferably has an upwardly tapered shaping.
  • the relatively thick clamping section 10 of the ring 4 maintains the sealing pressure on the disc 2 sealing surfaces both initially and during any of the positioning or dimensional changes which occur during retorting. Even though the disc 2 may move upwardly on the rim 17, the seal remains effective.
  • This clamping action maintains the sealing pressures in spite of the barrier plastic becom­ing more flexible at the retorting temperatures of 220° to 260°F.
  • the plastic such as polypropylene of the outer ring 4 is selected to maintain substantial rigidity at these and slightly higher temperatures by maintaining its tight grip.
  • a tamper indicating strip 12 is provided on the lower portion of the ring skirt 9.
  • the embodiment illustrated at 23 in FIG. 5 is generally similar to that of FIG. 4 with the exception of the tamper strip 18 and in this embodi­ment, the tamper strip 18 has a container engaging bead 19 which interlocks with a bead 20 on the container 21.
  • the strip 18 is removed using the tear tab 22 before closure removal.
  • the closure 23 is a press-on closure engaging container 21 at bead 24 by its locking bead 25.
  • the closure 23 is thumbed of using thumb tab 26.
  • FIGS. 6 and 7 illustrate additional closure embodiments.
  • FIG. 6 illustrates a disc 30 formed from barrier plastic with a Lowermost extruded plastisol sealing membrane 31.
  • the closure 30 has sealing means at its outer rim comprising an upwardly and outwardly curved sealing portion 32 which holds the sealing membrane 31 against the tapered inner sealing zone 33 of the container rim 34.
  • the closure 30 is formed in this shape by a cutting and stamping operation which leaves a resilient sealing force in the closure itself between the outwardly urged sealing portion 32 on the closure 30 and the flared and contacting container rim sealing zone 33.
  • a molded plastic ring 35 has container 39 engaging threads 37 on a skirt portion and a C-shaped closure gripping portion 36 at its top with the innermost edge 38 of the gripping portion 36 tightly engaging the disc 30 as illus­trated in FIG. 6.
  • FIG. 6 illustrates the plastic ring 35 with a tamper evident tear strip 40 including cooperating ratchet teeth 41 and 42 on the container and the tear strip respectively.
  • a tear tab 43 is provided on the strip 40 to facilitate its removal from the ring 35 when the container 39 is opened.
  • FIG. 7 The embodiment illustrated in FIG. 7 with a similar disc 30 and sealing members has a tear strip 44 engaging a container bead 45 with its own bead 46.
  • the tear strip 44 also includes a gripping tab 47 for removal.
  • the composite closure 48 illustrated in FIG. 7 is a snap-on closure which is held in place by a circular bead 49 on the container 50 and a cooperating circular bead 51 on the plastic ring 52.
  • a radially extending thumb tab 53 is formed on the plastic ring 52.
  • FIG. 8 illustrates a still further embodiment of a composite closure 60 having a plastic ring 61 such as a polypropylene ring for sealing the container 62 with a metal disc 63.
  • the metal discs 63 are cut and formed to provide a downwardly opening sealing channel 64 at the outer edge of the discs for engaging the tapered rim 65 of the container 62 along wide annular sealing areas 66 and 67 on the inner and outer side sealing surfaces at the container rim 65.
  • a plastisol or other suitable sealant 68 is sprayed into the sealing channel.
  • the sealing channel 64 in the metal disc is proportioned to provide a tight gripping or sealing action with the container rim 65 and because of this sealing action which is insensitive to significant vertical movement of the metal disc 63 on the sealed container 62 during retorting or otherwise.
  • This characteristic of the metal disc 63, together with the gripping forces of the rounded top 69 of the plastic ring 61 holding the sealing channel 64 in place provides for an excellent initial and continuing container seal.
  • Fig. 8 illustrates a tamper evident tear strip 70 with ratchet teeth 71 engaging cooperating teeth 72 on the container 62 and having a tear strip removing pull tab 73.
  • the generally similar closure 80 of FIG. 9 is a press-on closure sealed by engagement of the container bead 81 with the sealing bead 82 on a plastic ring 83 and having a locked tamper evident tear strip 84 engaging a projecting bead 85 on the container 86.
  • the tear strip 84 includes a pull tab 88 for removal and a thumb tab 69 for facilitating the removal of the closure is provided on the ring 83.
  • FIG. 10 illustrates another embodiment with a closure 90 having a downwardly opening sealing channel 91 held in sealing engagement with the tapered rim 92 of the con­tainer 93.
  • This is a one-piece closure formed from barrier layer plastic by a thermoforming operation.
  • a C shaped sealing portion 99 is provided at the top outer corner of the closure 90 and threads 94 are formed for engaging the cooperating container threads 95.
  • the one-piece thermo-­formed closure 90 also includes a ratchet-type tamper evident cut tear strip 96 including a thumb tab 97 for removal.
  • a relatively thick barrier plastic is used to insure a satisfactory type clamping effect at the sealing channel.
  • the carrier plastic is preferably formed by extrusion includ­ing an extruded plastisol sealing membrane 98. Alternatively, the sealing membrane may be sprayed into the sealing channel 91.
  • FIG. 11 illustrates an injection molded barrier-type closure 100 having a downwardly facing container rim gripping sealing channel 101.
  • a plastisol sealant 102 is sprayed into this channel.
  • the one-piece closure 100 includes a tear strip 103 with a pull tab 104 for removal as well as a thumb tab 105 for facilitating removal of the closure 100 from the container 106.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
EP87116572A 1986-12-16 1987-11-10 Fermeture pour récipient en matière plastique apte à être stérilisé Expired - Lifetime EP0272431B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US94221886A 1986-12-16 1986-12-16
US942218 1986-12-16

Publications (3)

Publication Number Publication Date
EP0272431A2 true EP0272431A2 (fr) 1988-06-29
EP0272431A3 EP0272431A3 (en) 1989-03-01
EP0272431B1 EP0272431B1 (fr) 1993-01-07

Family

ID=25477744

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87116572A Expired - Lifetime EP0272431B1 (fr) 1986-12-16 1987-11-10 Fermeture pour récipient en matière plastique apte à être stérilisé

Country Status (2)

Country Link
EP (1) EP0272431B1 (fr)
DE (1) DE3783448T2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2682084A1 (fr) * 1991-10-04 1993-04-09 Bonet Jose Collado Sa Bouchon de fermeture equipe de moyens d'indication d'une manipulation anterieure.
EP0395465B1 (fr) * 1989-04-24 1994-11-30 Plastohm S.A. Dispositif de fermeture à couvercle vissant muni d'une bande d'inviolabilité pour un pot ou analogue
WO1996041751A1 (fr) * 1995-06-09 1996-12-27 Carnaudmetalbox Plc Dispositif de fermeture
WO2008030640A1 (fr) * 2006-09-06 2008-03-13 Bristol-Myers Squibb Company Système de fermeture

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4813561A (en) * 1988-02-29 1989-03-21 Anchor Hocking Corporation Composite retortable closure
US4991731A (en) * 1989-08-03 1991-02-12 Abbott Laboratories/Ross Laboratories Retortable composite closure for plastic containers
US5111947A (en) * 1990-12-04 1992-05-12 Patterson Michael C Tamper proof cap and container
US5839592A (en) * 1995-06-09 1998-11-24 Anchor Hocking Packaging Co. Plastic closure
GB9606378D0 (en) 1996-03-26 1996-06-05 Metal Box Plc Composite closures for containers
US11040512B2 (en) 2017-11-08 2021-06-22 Northrop Grumman Systems Corporation Composite structures, forming apparatuses and related systems and methods

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1921016A (en) * 1929-07-10 1933-08-08 American Can Co Container closure
GB1278939A (en) * 1968-08-27 1972-06-21 Kork N Seal Ltd Container closure with sealing liner
US4151924A (en) * 1977-11-07 1979-05-01 Owens-Illinois, Inc. Liner element for closure cap
EP0154467A2 (fr) * 1984-02-24 1985-09-11 Continental White Cap, Inc. Emplacement de ponts de rupture dans des fermetures inviolables
EP0201613A1 (fr) * 1985-05-14 1986-11-20 Aci Australia Limited Capuchon pour un récipient à goulot ouvert

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1921016A (en) * 1929-07-10 1933-08-08 American Can Co Container closure
GB1278939A (en) * 1968-08-27 1972-06-21 Kork N Seal Ltd Container closure with sealing liner
US4151924A (en) * 1977-11-07 1979-05-01 Owens-Illinois, Inc. Liner element for closure cap
EP0154467A2 (fr) * 1984-02-24 1985-09-11 Continental White Cap, Inc. Emplacement de ponts de rupture dans des fermetures inviolables
EP0201613A1 (fr) * 1985-05-14 1986-11-20 Aci Australia Limited Capuchon pour un récipient à goulot ouvert

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0395465B1 (fr) * 1989-04-24 1994-11-30 Plastohm S.A. Dispositif de fermeture à couvercle vissant muni d'une bande d'inviolabilité pour un pot ou analogue
FR2682084A1 (fr) * 1991-10-04 1993-04-09 Bonet Jose Collado Sa Bouchon de fermeture equipe de moyens d'indication d'une manipulation anterieure.
BE1006510A3 (fr) * 1991-10-04 1994-10-04 Bonet Jose Collado Sa Capsule de fermeture a manipulation evidente avec double goulot.
WO1996041751A1 (fr) * 1995-06-09 1996-12-27 Carnaudmetalbox Plc Dispositif de fermeture
WO2008030640A1 (fr) * 2006-09-06 2008-03-13 Bristol-Myers Squibb Company Système de fermeture

Also Published As

Publication number Publication date
DE3783448T2 (de) 1993-05-06
DE3783448D1 (de) 1993-02-18
EP0272431A3 (en) 1989-03-01
EP0272431B1 (fr) 1993-01-07

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