EP0464061B1 - Unbefugtes öffnen anzeigender, eindrückbarer verschluss - Google Patents

Unbefugtes öffnen anzeigender, eindrückbarer verschluss Download PDF

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Publication number
EP0464061B1
EP0464061B1 EP90904731A EP90904731A EP0464061B1 EP 0464061 B1 EP0464061 B1 EP 0464061B1 EP 90904731 A EP90904731 A EP 90904731A EP 90904731 A EP90904731 A EP 90904731A EP 0464061 B1 EP0464061 B1 EP 0464061B1
Authority
EP
European Patent Office
Prior art keywords
closure
free edge
edge portion
closure member
opening
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
EP90904731A
Other languages
English (en)
French (fr)
Other versions
EP0464061A4 (en
EP0464061A1 (de
Inventor
Peter Lewis Revill
Alan George Dalli
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.)
Broken Hill Pty Co Ltd
Original Assignee
Broken Hill Pty Co Ltd
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 Broken Hill Pty Co Ltd filed Critical Broken Hill Pty Co Ltd
Publication of EP0464061A1 publication Critical patent/EP0464061A1/de
Publication of EP0464061A4 publication Critical patent/EP0464061A4/en
Application granted granted Critical
Publication of EP0464061B1 publication Critical patent/EP0464061B1/de
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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
    • B65D17/401—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall
    • 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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • 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
    • B65D2205/00—Venting means

Definitions

  • the invention relates to push-in easy-open closure in a sheet metal container member comprising: an opening in the container member; an integral closure member for the opening formed by at least partially severing the container member to form the closure member and the opening, said closure member having a free edge portion terminating in a free edge, said free edge portion being disposed in a first stratum and in overlapping relationship with a free edge portion of said container member around said opening, said free edge portion of said container member being disposed in a second stratum and having a free edge, said first stratum underlying said second stratum; sealant means applied to the closure member and to an adjacent portion of the free edge portion of said container member on an inside of the container member; and at least one latch member formed at said free edge portion of said closure member, said at least one latch member including a narrow portion of the free edge portion of the closure member which has been displaced from said first stratum to increase a push-in force required to open said closure member such that said sealant means in broken when said closure member is opened, said latch member further substantially inhibiting
  • a push-in easy-open closure of this type is disclosed in the document AU-A-444068.
  • the free edge portions forming the latch members have been displaced from the first stratum to a position above the second stratum where they are in contact with or closely overlying the exterior surface of the free edge portion of the container member. This prevents the closure member from being opened by accidental contact or by atmospheric pressure.
  • the opening force required is largely uncontrolled.
  • the present invention solves the problem of providing a push-in easy-open closure of the type indicated above which is so constructed that the opening force required to be applied to the closure is closely controlled.
  • this problem is solved in that at least one latch member has been displaced from said first stratum to said second stratum to form an end face of the edge portion of said latch member which abuts against an end face of said free edge of said container member.
  • the or each latch member forceably engages said free edge so that the force required to open the closure member is closely controlled.
  • the or each latch member is formed in the closure member to define said edge portion of said latch member in a position inwardly of said closure member free edge to leave an adjacent portion of said closure member edge in underlying relationship with said free edge portion of said container member.
  • the closure member is integrally connected to the container member by means of a narrow neck of metal defining a hinge connection for the closure member.
  • the closure member is preferably formed with two angularly spaced latch members, each positioned at about 90° to 140° from the centre of the narrow neck of metal. In the case of small closure members, and some large closure members, only one latch member need be provided and it is preferably positioned directly opposite the hinge connection.
  • the closure member is formed with a central upstanding portion and an outwardly extending rim portion which includes said free edge portion, said upstanding portion being dimensioned to be in such close proximity to said free edge portion of said container member to restrict the entry of foreign objects between said free edge portion of said container member and said closure member without visibly opening said closure.
  • the upstanding portion preferably has sides which are as close to the perpendicular to the rim as may be practically achieved. This further increases the difficulty in inserting an object between the closure member and the free edge portion surrounding the opening.
  • the closure member will be seen to comprise a generally circular pouring opening 1 and a smaller pressure releasing/venting opening 1a formed in a can end 2 by partially severing the sheet metal to form closure members 3 and 3a which are integrally connected to the can end 2 by means of narrow necks of metal 4 and 4a defining a hinge means for each closure member 3 and 5.
  • An upstanding semi-circular bead B partly surrounds the pressure releasing closure 3a to protect it against inadvertent opening during handling. Since the closure members 3 and 3a are essentially the same in construction, only the pouring closure 3 will be further described below.
  • the closure members 4 and 5 formed with an upstanding domed portion 5 surrounded by an outwardly extending rim 6.
  • the rim 6 is disposed in overlapping and underlying relationship with a free edge portion 7 of the can end around said opening 1 achieved by flattening a dome formed in said free edge portion 7 in the manner described in greater detail in the document AU-A-444 068.
  • the closure member 3 may additionally be coined at the rim 6, prior to the flattening operation,to increase the diameter of the closure member 3 and increase the amount of overlap provided.
  • the top of the dome 5 may also be coined to further increase the diameter of the closure member 3.
  • the overlapping regions are covered by a suitable sealant S to hermetically seal the closure members 3 and 3a with respect to the openings 1 and 1a.
  • the rim 6 of the closure is formed with two latch members 8 and 9 which overlap and overly the free edge portion 7 of the can end 2 at positions displaced about 120° from the centre of the hinge 4 in either direction. It will be appreciated that the latch members 8 and 9 may be located at other positions, such as at 90° from the centre of the hinge 4, or a single latch member may be located opposite the hinge 4.
  • the latches 8 and 9 shown in figure 4 which are similar to the claimed latches but do not correspond thereto are formed during or immediately after the sheet metal severing operation in which the closure member 3 and the opening 1 are initially defined.
  • the closure member 3 is displaced below the free edge portion 7 prior to the flattening of the free edge portion 7 to reduce the diameter of the opening 1, while the latches 8 and 9, being upwardly inclined with respect to the remaining portion of the rim 6, as shown in Figure 4, are disposed in overlying relationship to the free edge portion 7 after flattening.
  • the amount of overlap between the latch members 8 and 9 and the free edge portion 7 shown in Figure 4 is exaggerated for clarity, but is selected to be sufficient to increase the opening force required to be approximately equal to the force required to rupture the sealant S which is applied to the inner face of the can end 2 in the region of the rim 6 and free edge portions 7. Since the latch members 8 and 9 are larger in effective diameter than the opening 1, the closure member 3 is not able to return to the fully closed position after opening. In this way, opening of the closure member 3 may be readily detected visually and the contents of the can will be more likely to leak from the can to provide further evidence of tampering.
  • the construction of the closure is essentially the same as in the preceding embodiment, with the exception that the latch members 8' and 9' are positioned in abutting relationship with the free edge portion 7 of the can end 2, in the manner shown most clearly in Figure 8 of the drawings. Since the rim 6 is usually in overlapping underlying relationship with the free edge portion 7, the latch members 8' and 9' forcibly engage the free edge portion 7 so that the force required to open the closure member 3 is increased sufficiently to ensure that closure member 3 will be fully opened by the application of the necessary push-in force. Accordingly, opening of the closure member 3 will be much more visible than in the past, and the contents of the can will tend to leak from the can as further evidence of its opening. In Figures 6 and 7, the height of the latch means 8' and 9' has been exaggerated for clarity.
  • FIG. 5 to 8 The embodiment of Figures 5 to 8 is presently preferred as it performs acceptably in practice and is not as noticeably different from a standard prior art construction as the embodiment of Figures 1 to 4.
  • the flattening of the free edge portion 7 to produce the necessary overlap can result in displacement of the closure 3, caused by the flattening of the hinge region 4, causing unacceptable binding of the latch means 8' and 9'.
  • the radial sever lines L defining the hinge 4 (and the hinge 4a) are extended as shown in broken outline in Figures 1 and 2, to allow this part of the metal to absorb some of the free metal resulting from the flattening operation, and reducing the displacement of the closure 3 to acceptable levels.
  • the closures 3 and 3a are each formed with additional abutments 10, which are similar in appearance to the latch means 8' and 9' but are not fully formed to engage the free edge portion 7, as shown most clearly in Figure 10 of the drawings.
  • the purpose of the abutments 10 is to further deter the insertion of small thin probes, which must be angularly inserted at the periphery of the opening 3 in a sliding motion around the periphery.
  • the abutments 10 and the latches 8' and 9' prevent this sliding motion and further deter such activities.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Cartons (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Lock And Its Accessories (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)

Claims (8)

  1. Eindrück-Aufreißverschluß in einem Metallblech-Behälterteil (2), enthaltend:
       eine Öffnung (1, 1a) in dem Behälterteil (2);
       ein angeformtes Verschlußteil (3, 3a) für die Öffnung (1, 1a), das dadurch geformt ist, daß das Behälterteil (2) zur Bildung des Verschlußteils (3, 3a) und der Öffnung (1, 1a) wenigstens teilweise aufgetrennt ist, wobei das Verschlußteil (3, 3a) einen freien Randabschnitt (6) hat, der in einem freien Rand endet, wobei der freie Randabschnitt (6) in einer ersten Schicht in überlappender Beziehung zu einem die Öffnung (1, 1a) umgebenden freien Randabschnitt (7) des Behälterteils (2) angeordnet ist, wobei der freie Randabschnitt (7) des Behälterteils (2) in einer zweiten Schicht angeordnet ist und einen freien Rand hat, wobei die erste Schicht unter der zweiten Schicht liegt;
       ein Abdichtmittel (S), das auf das Verschlußteil (3, 3a) und auf einen anschließenden Abschnitt des freien Randabschnitts (7) des Behälterteils (2) an einer Innenseite des Behälterteils (2) aufgebracht ist; und
       wenigstens ein Verriegelungsglied (8', 9'), das an dem freien Randabschnitt (6) des Verschlußteils (3, 3a) gebildet ist, wobei zu dem wenigstens einen Verriegelungsglied (8', 9') ein schmaler Abschnitt des freien Randabschnitts (6) des Verschlußteils (3, 3a) gehört, der gegen die erste Schicht versetzt worden ist, um eine Eindrückkraft zu vergrößern, die erforderlich ist, um das Verschlußteil (3, 3a) derart zu öffnen, daß das Abdichtmittel (S) aufgebrochen wird, wenn das Verschlußteil (3, 3a) geöffnet wird, wobei das Verriegelungsglied (8', 9') im wesentlichen verhindert, daß sich das Verschlußteil (3, 3a) nach dem Öffnen wieder schließt,
       dadurch gekennzeichnet, daß
       das wenigstens eine Verriegelungsglied (8', 9') von der ersten Schicht zu der zweiten Schicht versetzt worden ist, um eine Stirnfläche des Randabschnitts des Verriegelungsglieds (8', 9') zu bilden, die an einer Stirnfläche des freien Randes (7) des Behälterteils (2) anliegt.
  2. Verschluß gemäß Anspruch 1, dadurch gekennzeichnet, daß das oder jedes Verriegelungsglied (8', 9') in dem Verschlußteil (3, 3a) so gebildet ist, daß es den Randabschnitt des Verriegelungsglieds (8', 9') an einer Stelle einwärts von dem freien Rand (6) des Verschlußteils so bestimmt, daß ein benachbarter Abschnitt des Verschlußteilrandes (6) unter dem freien Randabschnitt (7) des Behälterteils (2) liegt.
  3. Verschluß nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das verschlußteil (3, 3a) mit dem Behälterteil (2) einstückig durch einen schmalen Hals (4, 4a) verbunden ist, der eine Gelenkverbindung für das verschlußteil (3, 3a) bildet.
  4. Verschluß nach Anspruch 3, dadurch gekennzeichnet, daß zwei im Winkelabstand voneinander liegende Verriegelungsglieder (8', 9') jeweils bei etwa 90° bis 140° von der Mitte des schmalen Halses (4, 4a) aus Metall angeordnet sind.
  5. Verschluß nach Anspruch 3, dadurch gekennzeichnet, daß ein Verriegelungsglied im wesentlichen entgegengesetzt zu der Gelenkverbindung angeordnet ist.
  6. Verschluß gemäß einem der Ansprüche 3 bis 5, dadurch gekennzeichnet, daß nach oben ragende Anschläge an dem Verschlußteilrand (6) an Stellen gebildet sind, die im Abstand von, aber benachbart zu dem schmalen Hals (4, 4a) aus Metall liegen, daß die Anschläge (10) eine ähnliche Form wie die Verriegelungsglieder (8', 9') haben, aber nicht derart voll ausgebildet sind, daß sie an dem freien Randabschnitt (7) des Behälterteils (2) anliegen, und daß die Anschläge (10) so angeordnet sind, daß sie sie ein weiteres Hindernis gegen das Einführen von kleinen dünnen Sonden zwischen dem Verschlußteil (3, 3a) und dem freien Randabschnitt (7) des Behälterteils bildet.
  7. Verschluß nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das Verschlußteil (3, 3a) mit einem nach oben ragenden mittleren Teil und einem nach außen ragenden Randbereich geformt ist, der den freien Randabschnitt (6) enthält, und daß der nach oben ragende Teil so dimensioniert ist, daß er in so großer Nähe zu dem freien Randabschnitt (7) des Behälterteils (2) liegt, daß er den Eintritt von Fremdkörpern zwischen dem freien Randabschnitt (7) des Behälterteils (2) und dem Verschlußteil (3, 3a) ohne sichtbares Öffnen des Verschlusses beschränkt.
  8. Verschluß nach Anspruch 7, dadurch gekennzeichnet, daß die Seiten (5) des nach oben ragenden Teils im wesentlichen senkrecht zu dem Randbereich (6) sind.
EP90904731A 1989-03-17 1990-03-16 Unbefugtes öffnen anzeigender, eindrückbarer verschluss Expired - Lifetime EP0464061B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AUPJ325989 1989-03-17
AU3259/89 1989-03-17
PCT/AU1990/000108 WO1990011226A1 (en) 1989-03-17 1990-03-16 Tamper-evident push-in closure

Publications (3)

Publication Number Publication Date
EP0464061A1 EP0464061A1 (de) 1992-01-08
EP0464061A4 EP0464061A4 (en) 1992-07-08
EP0464061B1 true EP0464061B1 (de) 1994-12-21

Family

ID=3773790

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90904731A Expired - Lifetime EP0464061B1 (de) 1989-03-17 1990-03-16 Unbefugtes öffnen anzeigender, eindrückbarer verschluss

Country Status (10)

Country Link
EP (1) EP0464061B1 (de)
JP (1) JPH04504093A (de)
KR (1) KR920701004A (de)
AT (1) ATE115935T1 (de)
AU (1) AU634762B2 (de)
CA (1) CA2049066A1 (de)
DE (1) DE69015351T2 (de)
ES (1) ES2066197T3 (de)
WO (1) WO1990011226A1 (de)
ZA (1) ZA902053B (de)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU444068B2 (en) * 1970-09-16 1974-01-17 Broken Hill Proprietary Company Limited, The Easy-opening closures for cans andother containers
US3794206A (en) * 1972-04-06 1974-02-26 Line J De Frangible opening means for a container lid
AU472489B2 (en) * 1973-05-15 1976-05-27 Broken Hill Proprietary Company Limited, The Hinge displacement pushin easy-opening closures
AU528006B2 (en) * 1978-10-10 1983-03-31 Broken Hill Proprietary Company Limited, The Resealable pressure release closure
WO1980002133A1 (en) * 1979-03-29 1980-10-16 K Taniuchi Easy-to-open lid for container
WO1980002272A1 (en) * 1979-04-18 1980-10-30 K Taniuchi Easy-to-open top container
EP0021843A1 (de) * 1979-07-03 1981-01-07 Metal Closures Limited Leicht zu öffnender Verschluss für Dosen und dgl.

Also Published As

Publication number Publication date
DE69015351D1 (de) 1995-02-02
ZA902053B (en) 1990-12-28
CA2049066A1 (en) 1990-09-18
EP0464061A4 (en) 1992-07-08
EP0464061A1 (de) 1992-01-08
WO1990011226A1 (en) 1990-10-04
JPH04504093A (ja) 1992-07-23
DE69015351T2 (de) 1995-05-04
ATE115935T1 (de) 1995-01-15
KR920701004A (ko) 1992-08-10
AU634762B2 (en) 1993-03-04
ES2066197T3 (es) 1995-03-01
AU5282190A (en) 1990-10-22

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