EP0032115B1 - Druckablassverschluss - Google Patents

Druckablassverschluss Download PDF

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Publication number
EP0032115B1
EP0032115B1 EP81100016A EP81100016A EP0032115B1 EP 0032115 B1 EP0032115 B1 EP 0032115B1 EP 81100016 A EP81100016 A EP 81100016A EP 81100016 A EP81100016 A EP 81100016A EP 0032115 B1 EP0032115 B1 EP 0032115B1
Authority
EP
European Patent Office
Prior art keywords
closure
pressure releasing
pouring
container
container member
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
Application number
EP81100016A
Other languages
English (en)
French (fr)
Other versions
EP0032115A3 (en
EP0032115A2 (de
Inventor
Michael Debenham
Allan George Dalli
Peter Lewis Revill
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 Proprietary Company Pty Ltd
Original Assignee
Broken Hill Proprietary Company Pty 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 Proprietary Company Pty Ltd filed Critical Broken Hill Proprietary Company Pty Ltd
Priority to DE7878300012T priority Critical patent/DE2862312D1/de
Priority claimed from EP78300012A external-priority patent/EP0000091B1/de
Publication of EP0032115A2 publication Critical patent/EP0032115A2/de
Publication of EP0032115A3 publication Critical patent/EP0032115A3/en
Application granted granted Critical
Publication of EP0032115B1 publication Critical patent/EP0032115B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
    • B21D51/383—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures scoring lines, tear strips or pulling tabs
    • 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
    • B65D2205/00—Venting means

Definitions

  • This invention relates to improvements in push-in easy opening closures, particularly, but not exclusively, pressure releasing vent closures, and to container members incorporating such closures.
  • a push-in pressure releasing closure in a container member suitable for liquids under pressure comprising a closure member formed integrally from a portion of the container member and defined by at least a weakening line and being of dimensions capable of being opened by a digitally applied push-in force against the action of said pressure, said closure member having an operating portion which is adapted in use to have said push-in force applied thereto and a connection to said container member, characterised in that means are provided for substantially preventing permanent opening of said closure member by an unrestrained digitally applied push-in force whereby said closure member substantially returns to its closed position in the absence of said digitally applied push-in force to such an extent as to inhibit the escape of froth and/or liquid under pressure from within said container member.
  • resealable closures of the general type described in the above specification may be permanently opened when a pouring or drinking closure associated with the pressure releasing closure has been opened so that the pressure releasing closure acts to vent air into the container during pouring and drinking.
  • an object of the present invention to provide an improved push-in closure arrangement in which the pressure releasing closure is permanently opened by the opening of the pouring or drinking closure, hereinafter called the "pouring" closure.
  • the invention therefore provides a container member for use in a container for pressurized liquid, said container member including a push-in easy opening pouring closure defined by at least a weakening line, and a smaller pressure releasing closure defined by at least a weakening line and capable of being opened by a push-in force, characterised by said pressure releasing closure being formed partly within said pouring closure and partly outside said pouring closure, said pressure releasing closure being arranged so as to be permanently opened by the opening of said pouring closure to create an air venting passageway to assist in the venting of the contents of the container during pouring or drinking therefrom.
  • the invention provides a container end for use in a container for pressurized liquid, said container end including a push-in easy opening pouring closure defined by at least a weakening line, and a smaller pressure releasing closure defined by at least a weakening line and capable of being opened by a push-in force, said pressure releasing closure being formed partly within said pouring closure and partly outside said pouring closure, said pressure releasing closure being arranged so as to be permanently opened when said pouring closure is opened, said closures being integrally connected to said container end at a position adjacent the periphery of the end whereby said permanently opened pressure releasing closure creates a liquid draining opening which facilitates substantially complete draining of the contents of a liquid filled container having said container end.
  • a first embodiment of the closure is shown formed within a depressed region of a can end, the general method of formation thereof being substantially as described in the earlier application referred to above.
  • FIG. 1 to 3 includes a fully sheared closure member or tab 80 which overlaps with and underlies the metal surrounding a generally circular pouring/venting opening and is hinged to the end at 81.
  • a pressure releasing closure or tab 82 of the same type as tab 55 in Figures 9 and 10 of the earlier application referred to above, is formed partly within the tab 80 and is connected to the end at 83.
  • the connection is located outside the tab 80 and the tab 82 flexes about the connection.
  • the connection does not act as a hinge in use and, for this reason, it is described as a connection rather than a hinge.
  • the tab 82 overlaps and underlies the surrounding sheet metal of tab 80.
  • overlap of the tabs 80 and 82 is increased by coining the periphery of the tabs and the sheet metal adjacent the opening closed by tab 80.
  • the dimensions of the tabs 82 are selected so as to prevent permanent opening thereof by a digitally applied force.
  • the remote positioning of the connection means that the angle to which the tab 82 can be flexed by a digitally applied force will not be so great as to exceed the elastic limit of the metal at the connection so the tab will resume at least substantially its closed position on removal of the opening force.
  • the tab 82 is opened to relieve the pressure within the can. In most cases, the force digitally applied to the tab 82 will also open the tab 80, once the pressure is relieved. However, because the tab 82 is located near the hinge line of tab 80, this tab will tend to open con- trollably rather than suddenly to avoid accidental injury to the digit from the sides of the opening.
  • the closure 80 When the closure 80 is opened as shown in Figure 3, the closure 82 is forced to open about its connection 83 and because of the separation between the hinge 81 and the connection 83, the neck of metal joining the tab 82 and the connection 83 will be displaced below the surrounding metal of tab 80 and the can end to create a passageway 84 which acts as an air vent during the pouring or drinking operations. This improves the pouring and drinking characteristics of the end, especially the drinking characteristics in the event that the user's mouth substantially covers the pouring opening.
  • FIG 4 A modification of the embodiment of Figures 1 to 3 is shown in Figure 4.
  • the pouring and pressure releasing tabs 80' and 82' are identical in construction to the tabs 80 and 82 but the position of tab 82' is inverted so that the main operating portion thereof lies outside the pouring tab 80' and the tab 82' is connected to the tab 80' at 83'.
  • the can end is formed with a fully sheared closure member or tab 90 which overlaps with and underlies the metal surrounding the opening in the same manner as tab 80.
  • the tab 90 is hinged to the end about 91 and a small non-resealable pressure releasing closure tab 92 is formed over the hinge line with part of the tab 92 projecting into the tab 90.
  • the tab 92 is formed in basically the same manner as tab 82 only it is hinged to and about 93 in such a manner that the metal defining the connection permanently deforms when the tab 92 is opened to release the pressure within the can.
  • the tab 92 is still further opened as in the preceding embodiment to create a permanent venting passage for the pouring/drinking operations.
  • the embodiment of Figure 5 may also be modified similarly to the embodiment of Figure 3 by inverting the tab 92.
  • each of the tabs may be varied at the designer's choice.
  • the embodiment of Figure 1 is modified so that the tab 80" is oblate and the tab 82" is formed with a circular operating portion having a straight sided neck extending therefrom to the connection 83".
  • the tab 80" or the tab 82" may be pear-shaped as in Figure 9 of our earlier application.
  • the tabs 90 and 92 in Figure 4 may be similarly modified.
  • the tab 100 is pear-shaped and its hinge 101 is located adjacent the countersink of the can end.
  • the pressure releasing tab 102 is similar to the tab 82 and has its connection 103 to the end located outside the tab 100 and spaced from the hinge 101.
  • the two tabs have the same basic construction as the preceding embodiments.
  • the above embodiment opens similarly to the closure shown in Figures 1 to 3 but the tab 102 does not act as a vent during pouring and drinking. Instead the opening created by the tab 102 when the tab 100 opened facilitates additional draining of the contents of the can thereby overcoming one of the problems inherent in positioning the hinge 101 near the countersink.
  • tabs 80, 90 and 80" and tabs 82, 92 and 82" are located near the centre of the can end, to restrict the extent to which the tabs can be bent about their hinges.
  • This can be achieved by forming an indent or otherwise suitably shaping the undersides of tabs 80, 90 and 80" so that the forward edges of the tabs 82, 92 and 82" are engaged within the indent or shaping whereby the tabs 82, 92 and 82" act as a strut to prevent further bending movement of the tabs 80, 90 and 80" respectively.
  • this function may be achieved sufficiently by the frictional contact between the two tabs or by the sealant applied to the tabs.
  • Such an arrangement reduces the likelihood that the hinge metals connecting the tabs to their ends will fracture. This is not a problem with the Figure 7 embodiment since the can wall prevents bending beyond about 90°.
  • Figures 1, 4 and 5 have some similarity with the can end described in Werth et al U.S. Patent No. 3,741,432 in that the pressure releasing tabs are located partly within the pouring tabs. However, in the present invention the pressure releasing tab is partly located outside the pouring tab and its hinge or connection is not coincident with the hinging connection of the pouring tab to the end. This provides the quite distinct advantage that a separate air venting passageway, outside the confines of the opening closed by the pouring tab, is formed when the pouring tab is opened, whether or not the pressure releasing tab has been opened previously.
  • the separate air venting passageway will remain open even when the pouring opening is full of liquid since the venting tab extends outside the pouring opening. Furthermore, the air vent passageways created in the present embodiments are less likely to be covered during the drinking operation, even if the whole of the pouring opening is covered by the mouth of the user.
  • closures of the present invention can be used in can ends or in other container members, and can be formed of any suitable sheet metal material, including aluminium and steel, and can be of any suitable shape, depending upon the shape of the can body to which the can end or other container member is to be secured. It is also envisaged that the closures may be made in plastics materials by suitable moulding techniques.
  • the pouring closure there is no criticality in the absolute size of the pouring closure, although normally the pouring closure will be of such size as to prevent complete insertion of a user's finger, yet large enough to permit adequate outflow of liquid container contents.
  • the absolute size of the pressure releasing/venting aperture or opening is not critical, but normally the opening will be of a size as to prevent complete insertion of a user's finger, yet large enough to permit adequate outflow of internal container pressure upon pressure releasing, and to permit adequate inflow of air upon venting.
  • the sealant which is used for fully severed closures can be any suitable means or material, such as a sealing compound, plastic tape, adhesive foil, hot melt material, or a combination thereof.
  • a particularly suitable sealing compound is a plastisol-grade polyvinylchloride combined with a conventional plastisizer and compounding ingredients.
  • Such plastisol should be heat curable to form a non-tacky, somewhat yieldable solid material that aids in retaining the closure in place and maintains a hermetic seal under pressures of the magnitudes which normally occur in cans of carbonated and malt beverages.
  • the sealant must be sufficiently frangible to be ruptured upon the application of digitally applied push-in force on the respective closures.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)

Claims (7)

1. Behälterteil zur Verwendung in einem Behälter für eine unter Druck stehende Flüssigkeit, wobei das Behälterteil einen durch Eindrücken leicht zu öffnenden Ausgußverschluß (80, 80', 90, 80", 100), welcher durch wenigstens eine Schwächungslinie bestimmt ist und einen kleineren Druckentlastungsverschluß (82, 82', 92, 82", 102), enthält, der ebenfalls durch wenigstens eine Schwächungslinie definiert ist und der durch eine Eindrückkraft geöffnet werden kann, dadurch gekennzeichnet, daß der Druckentlastungsverschluß teilweise innerhalb und teilweise außerhalb des Ausgußverschlusses gebildet und so angeordnet ist, daß er durch das Öffnen des Ausgußverschlusses dauerhaft geöffnet wird, um einen Entlüftungsweg zu bilden, der die Entlüftung des Inhaltes des Behälters während des Ausgießens oder des Austrinkens unterstützt.
2. Behälterteil nach Anspruch 1, wobei der Druckentlastungsverschluß integral mit dem Behälterteil oder mit dem Ausgußverschluß verbunden ist (83, 83', 93, 83", 103) und der Druckentlastungsverschluß beim Öffnen des Verschlusses sich gegen diese Verbindung biegt und wobei der Druckentlastungsverschluß so ausgebildet ist, daß er beim Fortfall der Eindrückkraft im wesentlichen in seine geschlossene Stellung zurückkehrt.
3. Behälterteil nach Anspruch 2, wobei der Druckentlastungsverschluß so ausgebildet ist, daß eine Abbiegung des Verschlusses durch eine mit dem Finger ausbeübte Eindrückkraft über einen Winkel hinaus verhindert wird, bei welchem die elastische Bruchgrenze des Metalles an dieser Verbindung überschritten wird.
4. Behälterteil nach Anspruch 3, wobei der Druckentlastungsverschluß in einem ausreichenden Abstand von der Verbindung zu dem Behälterteil angeordnet ist, um eine Abbiegung der Verbindung über den genannten Winkel zu ververhindern.
5. Behälterteil nach Anspruch 1, wobei der Druckentlastungsverschluß integral mit dem Behälterteil verbunden ist und um diese Verbindung der Druckentlastungsverschluß während des Öffnungsvorganges verschwenkt und wobei der Druckentlastungsverschluß so ausgebildet ist, daß er die Verbindung bei der Öffnung derselben dauerhaft deformmiert.
6. Behälterteil nach einem der Ansprüche 1 bis 5, wobei der Behälterteil aus Blech besteht und der Ausgußverschluß und der Druckentlastungsverschluß von dem Blech voll abgeschert wird mit Ausnahme eines Teils, welches jeden dieser Verschlüsse mit dem Behälterglied verbindet und wobei der Ausgußverschluß und der Druckentlastungsverschluß das die von den Verschlüssen verschlossene Öffnung umgebende Blech überlappt und darunterliegt.
7. Behälterende zur Verwendung in einem Behälter für unter Druck stehende Flüssigkeit, wobei das Behälterende einen durch Eindrücken leicht zu öffnenden Ausgußverschluß (80, 80', 90, 80", 100), welcher durch wenigstens eine Schwächungslinie definiert ist, und einen kleineren Druckentlastungsverschluß (82, 82', 92, 82", 102) enthält, der ebenfalls durch wenigstens eine Schwächungslinie definiert ist und der durch eine Eindrückkraft geöffnet werden kann, wobei der Druckentlastungsverschluß teilweise innerhalb und teilweise außerhalb des Ausgußverschlusses gebildet ist und der Druckentlastungsverschluß so angeordnet ist, daß er für immer geöffnet wird, wenn der Ausgußverschluß geöffnet wird und wobei diese Verschlüsse integral mit dem Behälterende an einer Stelle in der Nähe der Peripherie des Endes verbunden sind (83, 83', 93, 83", 103) und wobei der ständig geöffnete Druckentlastungsverschluß eine Flüssigkeitsdrainageöffnung bildet, die ein im wesentlichen vollständiges Entleeren des in den das Behälterende aufweisenden Behälter gefüllten Flüssigkeitsinhaltes erleichtert.
EP81100016A 1977-06-10 1978-06-02 Druckablassverschluss Expired EP0032115B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE7878300012T DE2862312D1 (en) 1977-06-10 1978-06-02 Improved pressure release closure

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AU416/77 1977-06-10
AUPD041677 1977-06-10
EP78300012A EP0000091B1 (de) 1977-06-10 1978-06-02 Verbesserter Druckablassverschluss

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP78300012.8 Division 1978-06-02

Publications (3)

Publication Number Publication Date
EP0032115A2 EP0032115A2 (de) 1981-07-15
EP0032115A3 EP0032115A3 (en) 1981-08-19
EP0032115B1 true EP0032115B1 (de) 1984-02-08

Family

ID=25642163

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81100016A Expired EP0032115B1 (de) 1977-06-10 1978-06-02 Druckablassverschluss

Country Status (2)

Country Link
EP (1) EP0032115B1 (de)
DE (1) DE2862374D1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7975884B2 (en) * 2006-07-12 2011-07-12 Alcoa Inc. Vent tube for liquid container

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1019686A (en) * 1973-05-02 1977-10-25 Michael Debenham Easy-opening closure
GB2008061A (en) * 1977-11-18 1979-05-31 Comalco Prod Easy opening can end

Also Published As

Publication number Publication date
EP0032115A3 (en) 1981-08-19
DE2862374D1 (en) 1984-03-15
EP0032115A2 (de) 1981-07-15

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