EP0490779A1 - Metallkapsel mit Abreisslinie als Dichtung oder Sekundärdichtung und Herstellungsverfahren dafür - Google Patents

Metallkapsel mit Abreisslinie als Dichtung oder Sekundärdichtung und Herstellungsverfahren dafür Download PDF

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Publication number
EP0490779A1
EP0490779A1 EP91420364A EP91420364A EP0490779A1 EP 0490779 A1 EP0490779 A1 EP 0490779A1 EP 91420364 A EP91420364 A EP 91420364A EP 91420364 A EP91420364 A EP 91420364A EP 0490779 A1 EP0490779 A1 EP 0490779A1
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EP
European Patent Office
Prior art keywords
reliefs
hollows
capsule
incision
thickness
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
EP91420364A
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English (en)
French (fr)
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EP0490779B1 (de
Inventor
Guy Druesne
Joel Michaud
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.)
Pechiney Emballage Alimentaire
Original Assignee
Pechiney Emballage Alimentaire
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Publication of EP0490779A1 publication Critical patent/EP0490779A1/de
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Publication of EP0490779B1 publication Critical patent/EP0490779B1/de
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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
    • B65D41/62—Secondary protective cap-like outer covers for closure members
    • 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

Definitions

  • the invention relates to a metallic cap or overcap with tear line or improved tear-off tab.
  • the Applicant has sought to remedy such drawbacks, more particularly to obtain tongue tears reliably guided with preferably torn edges that are not injurious.
  • the subject of the invention is a metal closure or overcap capsule comprising a skirt with a thickness of between 0.06 and 0.4 mm, this skirt comprising at least one typically annular tear line, this line comprising an incision and a succession external reliefs and alternating transverse hollows, characterized in that one end of each said hollow is located in said tear line or less than 0.5 mm from this line, the thickness of the bottom of the hollow or residual being between 20 and 70% of the thickness of the skirt, and in that this said tear line comprises an external incision of bottom thickness at most equal to 70% of the thickness of said skirt.
  • these lines comprise two said external incisions situated between the two said successions of reliefs and hollows and thus delimiting said tearable tongue.
  • Each external incision typically has a bottom thickness of between 30 and 70% of the thickness of the skirt.
  • the incision could without disadvantage for the good guidance of the tearing be less deep than the hollows which reach it or almost reach it.
  • This measurement is particularly advantageous for the good mechanical strength of the capsule, especially when the hollows constitute a significant weakening, leaving for example a bottom thickness of 0.05 mm.
  • the difference between the bottom thickness of each incision is thus preferably 0.01 to 0.10 mm greater than the thickness of the troughs.
  • each tear line an area of width 0.4 to 1.5 mm.
  • said recesses are inclined from 10 to 30 ° relative to the longitudinal axis of the capsule in the case of metals or alloys of hardness H B greater at 30, the thickness of the bottom of the troughs decreasing towards the tear line. It is then an inclination in the cross direction of the knobs which facilitates the penetration of the reliefs, the limitation to 30 ° making it possible to prevent the corresponding torn edge from becoming injurious.
  • each incision and the corresponding tear line are made by means of a second succession of alternating reliefs and transverse hollows, the ends of these hollows being inserted between the ends of the hollows the first succession so as to form an external incision line on the capsule.
  • the preferential condition of orientation of alternate reliefs and hollows to facilitate tearing of the tongue is preferably accompanied by a specific orientation measure for each tear line now bordered by two successions of alternating transverse reliefs and hollows: the limits of their respective reliefs and hollows preferably form Vs oriented in the direction of tearing of the tongue.
  • the inclinations relative to the tearing direction are then preferably between 10 and 40 °.
  • the capsule of the invention is typically made of metal or alloy from the group formed by lead or alloy, tin or alloy, aluminum or alloy. Caps made of Al alloys with a Brinell hardness greater than 50 require greater compression forces.
  • the invention also applies to capsules of other metals or alloys, for example zinc or tinplate and to multilayer capsules essentially of metal with at least one layer of plastic material, each incision having a thickness of bottom preferably between 20% and 70% of the metal layer located inside the capsule.
  • the subject of the invention is also the method of manufacturing a line for tearing a metallic closure or overcap capsule with a skirt thickness of between 0.06 and 0.4 mm, in which this capsule is fitted onto a mandrel or internal tool and an external tool or knurled wheel is rotated relative to said internal tool, said external tool comprising at least one knurled ring each carrying a succession of alternating reliefs and hollows, and in which said capsule is compressed between said external tool and said internal tool during said rotation.
  • an annular knife is fixed against each said knurled ring, the cutting end of said knife being at least 0.02 mm in diameter smaller than the outside diameter of said knurled ring and being less than 0.5 mm of this ring, and the compression force of the external tool is adjusted on said nested capsule so as to obtain, after rotation with compression, minimum thicknesses of the capsule of between 20 and 70% of the thickness of its skirt for hollows produced by said alternating reliefs of knurled rings and for the external incision produced by each said annular knife.
  • the hollows between the reliefs of the knurled rings are clearances rather than contact surfaces of the capsule during said compression.
  • each said annular knife is replaced by a second knurled ring carrying alternating reliefs and hollows which are placed respectively opposite the alternating hollows and reliefs of the first said knurled ring, the second ring being fixed against the first and their junction thus defining an external incision formed by the ends of the hollows produced by said alternating reliefs.
  • This double knurling giving a very fine incision produces improved resistance to capping constraints while maintaining very good tearing.
  • This incision can be continuous, or discontinuous when the reliefs of the knurled rings are respectively offset or when these reliefs are narrower in width than the hollows they leave between them. It is thus possible to obtain discontinuous incisions well suited to the metal or alloy of the capsule, to its hardness and to its thickness.
  • FIG. 1 shows a wheel used for the manufacture of a first tear tab according to the invention, in elevation.
  • FIG. 2 represents the capsule obtained, with an axial half-section made at the level of the hollows of the two knurled zones and an external half-view of the capsule and of its tearing tab.
  • Figure 3 shows a portion of the half-section, enlarged at a tear line.
  • Figure 4 is an external half-view of a second capsule, in which the orientation of the reliefs and hollows of the tear lines is improved.
  • Figure 5 an assembly forming part of an outer wheel of embodiment of the invention in its particular mode.
  • Figure 6 is an external half-view of a third capsule having a tear tab according to this particular mode.
  • Figure 7 shows two knobs used for the manufacture of a fourth capsule, in elevation.
  • FIG. 8 represents this fourth capsule, with an axial half-section and an external half-view.
  • FIG. 1 represents a set of rollers 1, forming around its axis 2 and comprising two rollers 3 of inclined toothing 4, of external diameter 40 mm and width 0.7 mm, each roll 3 comprising 125 teeth 4 inclined at 25 ° by report to the management of the axis of symmetry and revolution 20, that is to say according to the width of the wheel 3.
  • the hollows between teeth have a depth of 0.4 mm, they do not come into contact with the capsule during knurling .
  • Two knives 5 are assembled respectively against the inner faces 6 of the rollers, they both have a diameter of 39.9 mm slightly smaller than the outside diameter of the rollers, which makes it possible to keep incision bottoms 9 a little thicker than the trough 10 (fig. 3) and prevents accidental cuts when handling the knurled assembly.
  • These knives 5 have a base width of 0.5 mm, and a frustoconical bevel 7 at 45 ° ending in an edge 70 of width 0.02 mm and of rounded profile.
  • the capsule 11 made of slightly alloyed tin containing more than 99% Sn and a thickness of skirt 0.16 mm, is fitted onto a punch (not shown) which '' is rotated at 1380 rpm.
  • This capsule 11 has an internal diameter of 29.5 mm at the level of the tearable tongue 8 to be shaped.
  • the knurling assembly 1 is applied against the skirt 12 of the capsule 11 with a force F of 80 daN for 0.16 seconds.
  • annular incisions 13 and 14 with a bottom thickness of incision 9 equal to 0.09 mm, each being bordered by a knurled zone, the recesses 15 of which have a bottom 10 with a thickness of 0.04 mm.
  • FIG. 3 shows the situation of the incision 13 with respect to the hollows 15 and reliefs 21 created by the wheel 3.
  • the break is perfectly guided by the incision 13 and has a mean direction 22 with an edge crenellated by the reliefs 21 and hollow 15 and a tongue side edge 8 of irregular surface.
  • the incisions obtained 130 and 140 are continuous or discontinuous depending on whether they are obtained with an assembly of offset wheels with reliefs and hollows of the same width and well opposite one another (assembly of FIG. 5), or that these same reliefs and hollows are respectively offset.
  • Tearing of the tabs such as 81 thus prepared is easy and gives crenellated torn edges as well for the tab 81 as for the strains 19 and 20, the tab 81 being itself bordered by knurled zones 23.
  • Tests were carried out on 160 Al capsules with at least 99.5% annealed purity, with a thickness of 0.09 mm skirt, according to the same technique of making the incision line by bringing together 2 notched knurled wheels. , using such knurls 50 and 51 of width or thickness 0.5 mm having as previously teeth or reliefs 52 inclined at 25 ° relative to the line of incision that they will produce, the reliefs of the two knurls having a width 0.2 mm unit and 1 mm pitch.
  • the end 53 of each relief 52, on the junction plane of the knobs 50 and 51, is in the middle of a hollow 54 of the other toothing, halfway between the reliefs 520 which frame this hollow.
  • the two wheel assemblies 60 are identical but independent, making it possible to produce 1 or 2 tear lines on a capsule.
  • Each includes the assembly of a knurled wheel 50 and an identical turned knurled wheel 51.
  • the end 530 of a hollow 52 is framed by two non-incised portions such as 541 of width along this 0.3 mm incision line.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
  • Gasket Seals (AREA)
  • Wrappers (AREA)
  • Sealing Material Composition (AREA)
EP91420364A 1990-12-05 1991-10-15 Metallkapsel mit Abreisslinie als Dichtung oder Sekundärdichtung und Herstellungsverfahren dafür Expired - Lifetime EP0490779B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9015454 1990-12-05
FR9015454A FR2670184B1 (fr) 1990-12-05 1990-12-05 Capsule metallique de bouchage ou de surbouchage avec languette dechirable et son procede de fabrication.

Publications (2)

Publication Number Publication Date
EP0490779A1 true EP0490779A1 (de) 1992-06-17
EP0490779B1 EP0490779B1 (de) 1994-11-30

Family

ID=9403085

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91420364A Expired - Lifetime EP0490779B1 (de) 1990-12-05 1991-10-15 Metallkapsel mit Abreisslinie als Dichtung oder Sekundärdichtung und Herstellungsverfahren dafür

Country Status (6)

Country Link
US (1) US5222616A (de)
EP (1) EP0490779B1 (de)
AT (1) ATE114590T1 (de)
DE (1) DE69105467D1 (de)
FR (1) FR2670184B1 (de)
PT (1) PT99420B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0550773A1 (de) * 1991-08-07 1993-07-14 Suntory Limited Verschlussdichtung
FR2786163A1 (fr) * 1998-11-25 2000-05-26 Pechiney Emballage Alimentaire Coiffes a ouverture facile pour vins effervescents
WO2000030948A1 (fr) * 1998-11-25 2000-06-02 Pechiney Emballage Alimentaire Coiffes a ouverture facile
FR2789978A1 (fr) * 1999-02-22 2000-08-25 Pechiney Emballage Alimentaire Coiffes a ouverture facile pour vins effervescents
FR2942210A1 (fr) * 2009-02-18 2010-08-20 Alcan Packaging Capsules Capsule de bouchage ou surbouchage a bande dechirable non blessante et son procede de fabrication

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2762304B1 (fr) * 1997-04-21 1999-05-28 Pechiney Emballage Alimentaire Capsule a manchon en matiere plastique
FR2811300B1 (fr) * 2000-07-06 2003-02-14 Pechiney Emballage Alimentaire Capsules de surbouchage a jupe roulee
FR2840596B1 (fr) * 2002-06-10 2004-09-17 Vaw Internat Capsules Coiffe de surbouchage a bandelette de dechirement pour bouteilles
FR2873658B1 (fr) * 2004-07-30 2006-10-27 Seticap Soc Par Actions Simpli Coiffe de surbouchage de bouteilles
ES2424896B1 (es) * 2012-04-03 2015-04-13 Ramondin Capsulas, S.A. Cápsula de sobretaponado, botella, máquina para realizar líneas de debilitamiento en una cápsula de sobretaponado, y método para realizar líneas de debilitamiento en una cápsula de sobretaponado.
EP3670378A1 (de) * 2018-12-20 2020-06-24 Amcor Flexibles Capsules France Flaschenhalskappe
IT201900007218A1 (it) * 2019-05-24 2020-11-24 Gallo Nicolo Capsula migliorata per bottiglia

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0226318A1 (de) * 1985-11-08 1987-06-24 Metal Closures Group Plc Kapseln
EP0360703A2 (de) * 1988-09-12 1990-03-28 Pechiney Emballage Alimentaire Verfahren zum Herstellen einer nichtschneidenden Sollbruchlinie und so hergestellte Produkte
EP0363285B1 (de) * 1988-09-07 1993-09-01 Pechiney Emballage Alimentaire Leicht zu öffnende Flaschenkapsel aus Aluminiumfolie sowie Verfahren zu ihrer Herstellung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1712102A (en) * 1927-02-07 1929-05-07 Closure Service Company Closure device for bottles and other containers
US1881529A (en) * 1929-09-14 1932-10-11 Anchor Cap & Closure Corp Sealed package
US4391383A (en) * 1981-07-07 1983-07-05 Societe Nouvelle De Bouchons Plastiques S.N.B.P. Oversealing caps

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0226318A1 (de) * 1985-11-08 1987-06-24 Metal Closures Group Plc Kapseln
EP0363285B1 (de) * 1988-09-07 1993-09-01 Pechiney Emballage Alimentaire Leicht zu öffnende Flaschenkapsel aus Aluminiumfolie sowie Verfahren zu ihrer Herstellung
EP0360703A2 (de) * 1988-09-12 1990-03-28 Pechiney Emballage Alimentaire Verfahren zum Herstellen einer nichtschneidenden Sollbruchlinie und so hergestellte Produkte

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0550773A1 (de) * 1991-08-07 1993-07-14 Suntory Limited Verschlussdichtung
EP0550773A4 (de) * 1991-08-07 1995-05-17 Suntory Ltd
FR2786163A1 (fr) * 1998-11-25 2000-05-26 Pechiney Emballage Alimentaire Coiffes a ouverture facile pour vins effervescents
EP1004517A1 (de) * 1998-11-25 2000-05-31 Pechiney Emballage Alimentaire Leicht zu öffnende Kappe für Schaumwein
WO2000030948A1 (fr) * 1998-11-25 2000-06-02 Pechiney Emballage Alimentaire Coiffes a ouverture facile
FR2789978A1 (fr) * 1999-02-22 2000-08-25 Pechiney Emballage Alimentaire Coiffes a ouverture facile pour vins effervescents
FR2942210A1 (fr) * 2009-02-18 2010-08-20 Alcan Packaging Capsules Capsule de bouchage ou surbouchage a bande dechirable non blessante et son procede de fabrication
WO2010094853A1 (fr) * 2009-02-18 2010-08-26 Alcan Packaging Capsules Capsule de bouchage ou surbouchage a bande dechirable non blessante et son procede de fabrication
CN102438913A (zh) * 2009-02-18 2012-05-02 法国安姆科软包装胶囊公司 带有防受伤的可撕裂带的瓶塞帽或二次瓶塞帽及其制造方法

Also Published As

Publication number Publication date
FR2670184B1 (fr) 1993-01-22
DE69105467D1 (de) 1995-01-12
FR2670184A1 (fr) 1992-06-12
PT99420B (pt) 1999-02-26
US5222616A (en) 1993-06-29
PT99420A (pt) 1994-01-31
EP0490779B1 (de) 1994-11-30
ATE114590T1 (de) 1994-12-15

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