EP0360703A2 - Verfahren zum Herstellen einer nichtschneidenden Sollbruchlinie und so hergestellte Produkte - Google Patents

Verfahren zum Herstellen einer nichtschneidenden Sollbruchlinie und so hergestellte Produkte Download PDF

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Publication number
EP0360703A2
EP0360703A2 EP89420333A EP89420333A EP0360703A2 EP 0360703 A2 EP0360703 A2 EP 0360703A2 EP 89420333 A EP89420333 A EP 89420333A EP 89420333 A EP89420333 A EP 89420333A EP 0360703 A2 EP0360703 A2 EP 0360703A2
Authority
EP
European Patent Office
Prior art keywords
reliefs
line
notch
capsule
narrow
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.)
Withdrawn
Application number
EP89420333A
Other languages
English (en)
French (fr)
Other versions
EP0360703A3 (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
Cebal SAS
Pechiney Emballage Alimentaire
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 Cebal SAS, Pechiney Emballage Alimentaire filed Critical Cebal SAS
Publication of EP0360703A2 publication Critical patent/EP0360703A2/de
Publication of EP0360703A3 publication Critical patent/EP0360703A3/de
Withdrawn legal-status Critical Current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
    • B21D51/386—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 on the side-wall of containers
    • 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

Definitions

  • the present invention relates to a method for producing an easy tearing device for a thin metallic product.
  • This product is typically a sheet of thickness less than or equal to 1 mm, or else a shaped thin product, such as a can, or a capping or overcapping means, made inviolable by this easy tearing device.
  • the invention also relates to the products obtained.
  • the Applicant has sought to obtain tear lines that do not have such drawbacks, that is to say non-injurious after opening.
  • the first object of the invention is a method of producing a tear line for a metal product with a thickness of less than or equal to 1 mm, characterized in that this metal product is compressed between a narrow elongated relief and a succession alternating reliefs and hollows arranged opposite this narrow relief, the differences in level between said alternating reliefs and hollows being transverse with respect to said narrow relief, and the compression force being such that the minimum thicknesses of said metal product after compression are between 0.01 and 0.15 mm.
  • This process has been tested on aluminum with a purity of 99.5% and on aluminum alloy in the annealed state as in the hardened state, and it gives an entirely surprising result: the tearing of the products thus formed. gives edges and tear slices with no rough edges that are offensive to the fingers.
  • the narrow elongated relief tends to push the adjacent portion of the metal product into the recess following the relief, which causes the product to bend in this recess depending on the length of this recess, which is also the spacing of the two successive reliefs, with a lower notch and possibly interrupted of this adjacent portion.
  • these portions of the metal product which are slightly or not notched ensure its solidity for transport and the complementary shaping or shapings, for example the crimping of a capsule on the neck of a bottle.
  • These portions must at the same time be easy to break, essentially by shearing force, in the tearing process.
  • the objective of the measures which will follow is to obtain an easy tearing without aggressive roughness, and at the same time still sufficient tensile strength.
  • the alternating reliefs and hollows used in the process of the invention follow one another in a pitch typically between 0.5 and 10 mm, the spacing of the reliefs, which is the length of the hollows with reference to the elongated relief narrow and conditions the length of the portions ensuring the residual tensile strength of the product, being between 0.2 and 4 mm.
  • the narrow elongated relief has, for its solidity and for the good control of the depths of notch, a V-profile of total angle 50 to 110 ° with an end radius of 0.03 to 0 , 15 mm.
  • the metal product is made of tinplate or aluminum or alloy
  • metals in alloys which have a similar behavior with regard to the tearing problems and deformations described, and has a thickness of between 0.06 and 0.4 mm
  • the preceding measurements remain valid, and preferential conditions are detailed below.
  • An interesting case is then that where the product is a container, for example a can, or a capsule. It is in this case practical to place the narrow elongated relief on a mandrel or punch fitted with a typical radial clearance of 1 to 3 mm on the diameter in the body of said container or the skirt of said capsule, the alternating reliefs and hollows being worn.
  • an external body for example a wheel, which, during compression, is in relative rotation relative to this mandrel or punch coated with the product.
  • Instantaneous compression then first concerns the area of the product clamped between the narrow relief of the punch and the relief or reliefs facing it on the wheel.
  • the alternating reliefs and hollows have the shape of teeth having two parallel edges making an angle of at least 20 ° with the direction of the narrow elongated relief in the compression position, these teeth being alternated with hollows of length 0.3 to 1.5 mm, the pitch (tooth + hollow) being 0.5 to 3 mm. Teeth edges roughly perpendicular to the direction of the elongated relief are preferred when making a single tear line.
  • An advantageous arrangement comprises: a rotary mandrel (or punch), the narrow elongated relief being disposed perpendicular to the axis of rotation of this mandrel, and the alternating reliefs and hollows forming a knurled ring carried by a crazy wheel whose rotation is parallel to the axis of rotation of the mandrel during compression, which locally clamps the body of the container or the skirt of the capsule between said narrow elongated relief and the knurled ring.
  • the compression force is adjusted so as to obtain minimum thicknesses after compression between 0.01 and 0.08 mm.
  • the mandrel carries 2 narrow peripheral reliefs and the wheel carries 2 knurled rings coming in front of said narrow peripheral reliefs so as to simultaneously produce the 2 tearing edges of a tongue tearable from container or capsule.
  • the transverse edges of the teeth of the two knurled rings are then preferably inclined symmetrically with respect to the direction of the peripheral reliefs of the mandrel, so as to better hold the metal and to produce tearing edges that are well parallel, these inclinations typically being from 20 to 40 ° with the perpendicular to this direction of the peripheral reliefs.
  • Another subject of the invention is the metal products produced, of thickness less than or equal to 1 mm, comprising at least one tear line having on one face a notch line comprising deep portions of thickness at the bottom of the notch between 0.01 and 0.15 mm alternated with solid portions or more slightly notched with lengths along this notch line between 0.2 and 4 mm, with a pitch between 0.5 and 10 mm.
  • the preceding values are preferably: - thickness at the bottom of the notch of the deep portions of the notch line of the tear line: 0.01 to 0.08 mm; - unit length of the solid or slightly notched portions located between these deep portions: 0.3 to 1.5 mm; - these deep portions of the notch line and these portions solid or slightly notched being arranged in a repeating step of 0.5 to 3 mm.
  • the tear line of the invention being located on the body of the box or on the skirt of the capsule, the notch line of this tear line is typically located on the inner face of this body or this skirt and the corresponding transverse marks and longitudinal undulations are particularly visible on its outer face.
  • the surface on the side of the notch also has small undulations, the identification of the undulations on the other face being however easier since they accompany the marking of this face by the transverse edges. teeth that compressed it.
  • the invention applies to all metals or alloys whose nature and state leads to asperities which are injurious to tearing. It is particularly important in the case of mass-market packaging, typically made of tinplate or aluminum or alloy containing at least 97% Al.
  • This example relates to low-alloy Al capsules (grade 1050 of the Aluminum Association with a skirt of 0.14 mm and an internal diameter of 29.5 mm near their head, at the level of the tear-off tongue which will be shaped.
  • the height of the teeth 10 was 0.5 mm, and the recesses 11 between teeth of 0.6 mm length had inclined edges.
  • the transverse edges 12 of the teeth 10 were + 30 ° and - 30 ° relative to the main direction of the knurled rings 8 and 9, as shown in FIG. 1.
  • the punch 1 was capped with a capsule 13 (FIG. 2), this punch 1 was rotated at 1485 rpm and the wheel 6, the axis of rotation 7 of this wheel 6 being parallel to the axis of rotation 14 knurled 8 or 9 being at the level of the V-shaped end profile 5 of a peripheral relief 2 or 3 of the punch 1.
  • the force of application of the punch was 4 daN.
  • the compression was stopped for each capsule after a variable number of turns, at least 1 turn. This number of turns had no influence on the tearing behavior.
  • the opening 17 and the primer or end 18 of the tear-off tongue 19 have been punched in addition, the preparation of which is thus completed.
  • the tearing edges of this tab 19 are not visible externally (1/2 right view of Figure 2).
  • FIG. 3 which represents a longitudinal section of a tear zone or line such as 16 passing through the line of the notches produced by the end 5 of the V-profile at 90 ° from the peripheral relief 3 of the punch 1 (FIG. 1 and 2)
  • portions in Al 20 comprising in the cutting plane a notch 21 of small depth 0.02 mm and a notched thickness 22 of 0.14 mm and of highly notched portions 23 of residual thickness at the bottom of notch 0.02 mm with a thickness of 0.16 mm at the edge of the notch.
  • FIG. 4 shows the profile of the corresponding notch or groove 24 with this notch bottom 25 of thickness 0.02 mm.
  • the deformations caused by the compression of the skirt 26 of the capsule 13 between the relief 3 and the knurled ring 9 are: longitudinal undulations 27 of the right and reverse surfaces affecting the compressed zone and its surroundings, sudden changes in slope 28, which correspond to the impact of the transverse edges 12 of the teeth 10, resulting in or constituting marks particularly visible on the external face of the capsule 13.
  • the pitch of the portions 20 and 23 is 1 mm like the pitch of the reliefs of this ring 9.
  • Figure 6 shows the outline of a tab 19 torn according to its thickness to the profile projector: the apparent thickness varies from 0.07 to 0.22 mm, which is mainly due to the deformations already reported and those caused by the tear.
  • FIG. 7 representing a part of the torn edge 29 of the tongue 19, the two zones 30 and 31 having longitudinal grooves 32 correspond to a 45 ° face of two neighboring deep cuts 24, while the intermediate zone 33 corresponds to broken non-incised metal.
  • the streaks 32 are due to the depression of the relief 3 of the punch.
  • this broken metal 33 has the shape of a folded lip, which is in continuity with the broken notch bottom 25 of the heavily notched portion (FIGS. 8 and 7).
  • the offset d between the tip of the lip 33 and the tear in the notch bottom 25 is 0.10 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Packages (AREA)
EP19890420333 1988-09-12 1989-09-11 Verfahren zum Herstellen einer nichtschneidenden Sollbruchlinie und so hergestellte Produkte Withdrawn EP0360703A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8812547 1988-09-12
FR8812547A FR2636257B1 (fr) 1988-09-12 1988-09-12 Procede de realisation d'une ligne de dechirement non coupante et produits obtenus

Publications (2)

Publication Number Publication Date
EP0360703A2 true EP0360703A2 (de) 1990-03-28
EP0360703A3 EP0360703A3 (de) 1990-12-05

Family

ID=9370389

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890420333 Withdrawn EP0360703A3 (de) 1988-09-12 1989-09-11 Verfahren zum Herstellen einer nichtschneidenden Sollbruchlinie und so hergestellte Produkte

Country Status (4)

Country Link
US (1) US5103989A (de)
EP (1) EP0360703A3 (de)
FR (1) FR2636257B1 (de)
PT (1) PT91681A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2670184A1 (fr) * 1990-12-05 1992-06-12 Pechiney Emballage Alimentaire Capsule metallique de bouchage ou de surbouchage avec languette dechirable et son procede de fabrication.
FR2677333A1 (fr) * 1991-06-04 1992-12-11 Pechiney Emballage Alimentaire Capsule de bouchage ou de surbouchage en aluminium ou alliage ecroui a bande dechirable non blessante et son procede de fabrication.

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG48021A1 (en) * 1991-08-07 1998-04-17 Hippon Foil Mfg Co Ltd Cap seal
JP2587064Y2 (ja) * 1993-03-17 1998-12-14 日本製箔株式会社 キャップシール
FR2762304B1 (fr) * 1997-04-21 1999-05-28 Pechiney Emballage Alimentaire Capsule a manchon en matiere plastique
PT1152960E (pt) * 1998-11-25 2003-11-28 Pechiney Capsules Capsula de sobre uma rolha com abertura facil
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
US20050077263A1 (en) * 2003-10-10 2005-04-14 Garcia Omar Alcides Bottle stopper
CA2702619C (en) * 2007-10-18 2014-01-28 Mccormick & Company, Incorporated Tamper resistant container with locking rim
USD599203S1 (en) 2008-03-03 2009-09-01 Mccormick & Company, Incorporated Tamper evident lid for container with a locking lid and rim
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.
JP2019528908A (ja) 2016-09-19 2019-10-17 マコーミック アンド カンパニー インコーポレイテッド ３ドアの蓋、および同蓋を利用する容器
USD850912S1 (en) 2016-09-19 2019-06-11 Mccormick & Company, Incorporated Three door container lid
USD846398S1 (en) 2016-09-19 2019-04-23 Mccormick & Company, Incorporated Container with three door lid
USD845139S1 (en) 2016-09-19 2019-04-09 Mccormick & Company, Incorporated Spice container
ES2861581T3 (es) * 2017-10-24 2021-10-06 Ramondin Capsulas S A Cápsula para botellas
EP3670378A1 (de) * 2018-12-20 2020-06-24 Amcor Flexibles Capsules France Flaschenhalskappe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1542097A (en) * 1921-06-06 1925-06-16 Albert E Ripley Perforating attachment
US1575223A (en) * 1923-11-12 1926-03-02 American Can Co Scoring machine
EP0221447A2 (de) * 1985-11-04 1987-05-13 Fael S.A. Blechzuschnitt zur Herstellung von geschweissten Blechzargen für Blechdosen
CH667248A5 (en) * 1985-03-06 1988-09-30 Siegfried Frei Safety opener for metal can - has parallel grooves near lid and with hinge fitting opener key

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1623223A (en) * 1923-11-12 1927-04-05 American Can Co Scoring machine
US3142280A (en) * 1961-08-07 1964-07-28 American Can Co Container and method of forming the same
US4504181A (en) * 1978-11-29 1985-03-12 Continental Can Company, Inc. Method of forming scored metal sheet
AU591715B2 (en) * 1985-11-04 1989-12-14 Fael S.A. A sheet metal blank for producing the body of cans

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1542097A (en) * 1921-06-06 1925-06-16 Albert E Ripley Perforating attachment
US1575223A (en) * 1923-11-12 1926-03-02 American Can Co Scoring machine
CH667248A5 (en) * 1985-03-06 1988-09-30 Siegfried Frei Safety opener for metal can - has parallel grooves near lid and with hinge fitting opener key
EP0221447A2 (de) * 1985-11-04 1987-05-13 Fael S.A. Blechzuschnitt zur Herstellung von geschweissten Blechzargen für Blechdosen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2670184A1 (fr) * 1990-12-05 1992-06-12 Pechiney Emballage Alimentaire Capsule metallique de bouchage ou de surbouchage avec languette dechirable et son procede de fabrication.
EP0490779A1 (de) * 1990-12-05 1992-06-17 Pechiney Emballage Alimentaire Metallkapsel mit Abreisslinie als Dichtung oder Sekundärdichtung und Herstellungsverfahren dafür
FR2677333A1 (fr) * 1991-06-04 1992-12-11 Pechiney Emballage Alimentaire Capsule de bouchage ou de surbouchage en aluminium ou alliage ecroui a bande dechirable non blessante et son procede de fabrication.

Also Published As

Publication number Publication date
FR2636257B1 (fr) 1990-10-12
PT91681A (pt) 1990-03-30
US5103989A (en) 1992-04-14
EP0360703A3 (de) 1990-12-05
FR2636257A1 (fr) 1990-03-16

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