EP0404654B1 - Procédé de fabrication d'un élément de fermeture dit à ouverture contrôlée d'une boîte notamment métallique, élément de fermeture obtenu selon ce procédé et boîte en comportant application - Google Patents

Procédé de fabrication d'un élément de fermeture dit à ouverture contrôlée d'une boîte notamment métallique, élément de fermeture obtenu selon ce procédé et boîte en comportant application Download PDF

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Publication number
EP0404654B1
EP0404654B1 EP90401703A EP90401703A EP0404654B1 EP 0404654 B1 EP0404654 B1 EP 0404654B1 EP 90401703 A EP90401703 A EP 90401703A EP 90401703 A EP90401703 A EP 90401703A EP 0404654 B1 EP0404654 B1 EP 0404654B1
Authority
EP
European Patent Office
Prior art keywords
crimping
aperture
inner cap
closure element
edge
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
EP90401703A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0404654A1 (fr
Inventor
Gabriel De Smet
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.)
Sollac SA
Original Assignee
Sollac SA
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 Sollac SA filed Critical Sollac SA
Publication of EP0404654A1 publication Critical patent/EP0404654A1/fr
Application granted granted Critical
Publication of EP0404654B1 publication Critical patent/EP0404654B1/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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/50—Non-integral frangible members applied to, or inserted in, preformed openings, e.g. tearable strips or plastic plugs
    • B65D17/506—Rigid or semi-rigid members, e.g. plugs
    • 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

Definitions

  • the subject of the present invention is a method of manufacturing a closure element known as a controlled opening for boxes, in particular of metal or various containers, and a closure element obtained by this method.
  • the present invention also relates to a box equipped with such a closure element.
  • the opening of a particularly metallic box often requires the use of a utensil of the can opener type, the implementation of which is sometimes dangerous and in any case difficult.
  • all the various known opening systems have as an essential element an incision line surrounding a removable panel on which is fixed an opening ring provided with an incision spout, this is to say an element allowing to introduce a finger into it.
  • the incision line determines a zone of least resistance of the cover, the incision spout is used to perforate the cover at the level of the incision line and the ring to tear off the removable panel "by force".
  • the removable panel and the opening ring are assembled by welding or by a rivet stamped in the cover, introduced into said ring and mated thereon.
  • the opening gesture which consists in raising the ring to perforate the incision line, then draw it towards you to tear off the removable panel, makes the box unstable due to the spring effect resulting from the separation, often brutal, of the removable panel torn off "in force" and comprises risk of cutting your hand.
  • the separation of the removable panel from the rest of the closure element forms, along the incision line on the removable panel and the cover, a sharp edge which can cause cuts.
  • the formation of the incision line on the closure element must be carried out with precision in order to obtain a rigorous positioning of the incision spout relative to this line, which requires expensive tools.
  • the cover is formed by a thin element which is cut when the box is opened.
  • the object of the present invention is to avoid the abovementioned drawbacks and to make available to packaging manufacturers and consumers, an element for closing an orifice. easy to open, safe and secure.
  • the subject of the present invention is therefore a method of manufacturing a closure element known as a controlled opening of a metal box from a sheet blank, a method according to which the sheet blank is stamped to form a convex zone, a curved zone is formed from this curved zone and a cut is made at this curved zone to produce an orifice comprising a peripheral skirt, a part of the peripheral skirt is enlarged by inserting an element in the latter and by flattening this element, then a removable cover is crimped onto the orifice, forming a crimping edge constituted by the peripheral skirt.
  • the present invention also relates to a closure element known as a controlled opening of a metal box, comprising an orifice surrounded by a peripheral skirt and at the level of which a removable cover is crimped, the crimping edge formed by the peripheral skirt being in shrinkage relative to the edge of the orifice (see US-A-1863337) characterized in that the removable cover consists of a previously formed patch (claim 6), or by cutting the orifice (claim 7), the surface of the cover after crimping being substantially identical to its surface before crimping and the perimeter of said cover after crimping being greater than its perimeter before crimping,
  • the present invention also relates to a box for applying the closure element according to any one of claims 6 to 13, characterized in that it comprises an orifice with controlled opening produced by crimping an attached removable cover.
  • the box is a metal box and the removable cover, after crimping, is larger than the orifice.
  • the present invention also relates to a beverage can for applying the closure element according to any one of claims 6 to 13 comprising a removable crimped cover.
  • the box has a body 1 which has at its upper part an opening 2 on the edge of which is crimped a designated closure element as a whole by reference 3.
  • This closing element 3 comprises an orifice 5 at the level of which is crimped a removable cover 4 which constitutes the detachable element of the box with controlled opening.
  • a blank 10 of identical shape to the opening 2 of the box and having a surface greater than said opening is cut from a metal strip, not shown, so as to be able to form the crimping edge on the body 1.
  • the device will be described as being constituted by a succession of independent tools in the description which follows.
  • the sheet blank 10 is placed in a first stamping tool (Figs. 2 and 3) comprising a base 11 forming a matrix which has an imprint 12 on its upper part.
  • the matrix can be independent of the base 11 and placed in a housing provided for this purpose inside said base.
  • the upper edge of the base 11, which surrounds the imprint 12 constitutes a lower peripheral blank holder 13.
  • the first tool stamping comprises a body 14, the lower part of which constitutes an upper peripheral blank holder 15.
  • the body 14 includes a well 16 into which enters a punch 17, the upper face of which has a shape complementary to that of the cavity 12 of the matrix.
  • the upper peripheral blank holder 15 is first lowered so as to tighten the peripheral edge of the blank 10.
  • a second stamping tool (Figs. 4 and 5) comprising a base 20 which comprises a central cavity 21 in which is mounted a movable punch 22 provided on its upper face of a small flat 22a.
  • the movable punch 22 cooperates with a member 23 for regulating the movement of said punch which can be constituted for example by a spring so that in the rest position the upper face of the movable punch 22 is located above the upper face of the base. 20.
  • the second stamping tool also comprises a body 24 whose lower part constitutes an upper peripheral blank greenhouse 25.
  • This body 24 comprises a well 26 in which slides a matrix 27 whose lower face is provided with an imprint 28 of complementary shape to that of the movable punch 22.
  • the imprint 28 also includes a small flat 27a.
  • the blank 10 is placed on the upper face of the base 20 and the upper peripheral blank holder 25 is lowered first in order to tighten the peripheral edge of said blank.
  • the matrix 27 is gradually lowered so that a portion of the convex zone 10a penetrates into the cavity 28 under the action of the movable punch 22 so as to form, from said convex zone 10a, a small curved zone 10b connecting to the rest of the blank 10 by a substantially vertical peripheral skirt 10c.
  • the curved zone 10b has a flat 10′b.
  • the movable punch 22 also descends, which compresses the spring 23.
  • the blank 10 thus formed is once again turned over and placed in a punching tool (Figs. 6 to 8).
  • This punching tool comprises a matrix 30 comprising an imprint 31 of shape complementary to the curved shape (10b, 10c) formed on the blank 10 and in which a well 32 opens.
  • the intersection between the imprint 31 and the well 32 forms a sharp edge 32a.
  • a pusher 33 In this well 32 is slidably mounted a pusher 33.
  • the punching tool also comprises, in the axis of the well 32 and of shape complementary to said well, a punch 34 which has on its lower edge a cutting edge 34a.
  • the blank 10 is placed on the upper face of the matrix 30 in such a way that the curved zone (10b, 10c) comes to lodge in the cavity 31.
  • This cut 10d has the same dimensions as the opening 5a produced in the blank 10.
  • the pusher 33 After reassembling the punch 34, the pusher 33 rises and passes the cutout 10d through the opening 5a to position said cutout above the edge of the curved area 10b, as shown in Fig.8.
  • maintaining the cutout 10d on the pusher 33 can be achieved by a stud 10g formed on said cutout and fitting into a housing 33a made on the pusher 33.
  • the assembly constituted by the blank 10 and the blank 10d is transferred to a crimping tool (Figs. 9 to 11).
  • This crimping tool is constituted by an upper punch 40 and a lower pile 42, both being vertically movable so as to be able to approach one towards the other.
  • the upper punch 40 has a raised portion 41 of complementary shape to the skirt 10c formed in the blank 10.
  • the pile 42 has a groove 43a which delimits a central portion 43 of complementary shape to the opening made in said blank.
  • the groove 43a makes it possible to roll the end of the skirt 10c over the cutout 10d as will be described later.
  • the raised part 41 of the punch 40 enters the skirt 10c and blocks the edge of this skirt while the central part 43 of the pile 42 enters the opening 5a of the blank 10 as shown in FIG. 10.
  • the edge 10b is in abutment on the bottom of the groove 43a.
  • the edge of the cutout 10d is supported on the raised part 41 and is positioned substantially at mid-height of the skirt 10c, while the bottom of said cutout 10d rests on the central part 43 of the punch. 42.
  • the cutout 10d is completely flattened and crimped in the crimping fold 10th which is formed under the action of the punch 40 and the pile 42 as shown in FIG. 11.
  • the groove 43a rolls inward the outer edge of the crimping fold 10e so that the cutting edge of said fold is embedded in the cutout 10d which prevents oxidation of said edge.
  • the crimping edge 10e is set back from the folded edge 10f forming the orifice 5.
  • the surface of this crimped cutout is substantially identical to its surface before crimping, but the perimeter of the crimped cutout is greater than its perimeter before crimping so that it can be pinched in folds during the crimping operation.
  • a closing element 3 which comprises a removable cover 4 set constituted by the cutout 10d itself and which suffices to crimp on the body 1 of the box (Fig. 1) to have a hyper closure. - waterproof.
  • the seal is produced, on the one hand, at the peripheral edge of the cover 4 and, on the other hand, at the edge of the crimping fold 10e.
  • the cover is not constituted by the cut 10d itself, but by a patch cut either in the metal strip where the blank 10 is cut, but in a different zone, or in another metal strip.
  • the patch is previously formed to obtain a curve identical to the cut 10d and the crimping is carried out in the same manner as above.
  • the cover 4 can be formed from a material different from the blank 10 or a different color, then crimped, as previously with the edge of the orifice 5 formed in said blank.
  • the cover also has the same surface and a curve identical to the cut 10d made in the blank.
  • the cover 4 comprises a curved zone 4a, for example oriented towards the inside of the box 1.
  • the cover 4 is not constituted by the cutout 10d produced directly in the blank 10, as for the previous variant, due to the curved area 4a.
  • the cover 4 is constituted by a pellet cut either in the metal strip where the blank 10 is cut, but in a different area, or in another metal strip, and formed to obtain the curved area 4a.
  • the cover 4 has a larger perimeter than the perimeter of the orifice 5.
  • the blank 10 in which the skirt 10c and the opening 5a have been previously produced, is placed in a forming tool (Figs. 13 and 14).
  • This tool is constituted by a lower punch 50 comprising an elastic washer 51 of shape complementary to the skirt 10c.
  • the tool comprises, on the other hand, an upper punch 52 comprising a raised portion 53 of shape complementary to the skirt 10c and penetrating into said skirt.
  • An element 54 forming a stop is placed at a certain distance and around the skirt 10c.
  • the widening of the skirt 10c can also be obtained by a cushion made of an elastomeric material which deforms under the action of a punch.
  • the element 5 limits the widening of the skirt 10c and contributes to the formation of the vertical edge of said skirt.
  • the blank 10 thus formed is placed in a crimping tool identical to FIGS. 9 to 11 comprising two punches 40 and 42 (Figs 15 and 16) and the cover 4, previously formed, is positioned in the skirt 10c.
  • the folded edge 10f is flattened and, thanks to the groove 43a, the outer edge of the crimping fold 10e is rolled inward so that the cutting edge of said fold is embedded in the seal 4 to seal and prevent oxidation of said wafer.
  • the crimping edge 10e is also set back from the folded edge 10f.
  • the cover 4 can also be formed from a material different from the plane 10 or from a different color.
  • the control of the force necessary for the opening of the box is obtained during manufacture, by adjusting the crimping forces of the cover.
  • the cover 4 may be provided with a ring 6 which is riveted or welded to the said cover making it possible to pull on this cover to open the box.
  • the closure element according to the invention has, among other things, the advantage of not having any accessible cutting edge which can cause cuts when the box is opened and of ensuring food protection of the edge surrounding the orifice. in which the cover is set.
  • the cover may have all the desired dimensions, any shape, round, triangular, elliptical, adapted to each type of box and the closure element may include several crimped and detachable covers.
  • the removable cover can be produced on the body of the box or on the bottom of the box.
  • the invention applies to all cans, in particular metal cans, to various containers and for example to drink cans.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Closures For Containers (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Lift Valve (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Magnetically Actuated Valves (AREA)
  • Eyeglasses (AREA)
  • Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
  • Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
  • Pipe Accessories (AREA)
  • Cartons (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Mechanically-Actuated Valves (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
EP90401703A 1989-06-23 1990-06-18 Procédé de fabrication d'un élément de fermeture dit à ouverture contrôlée d'une boîte notamment métallique, élément de fermeture obtenu selon ce procédé et boîte en comportant application Expired - Lifetime EP0404654B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8908413A FR2648791B1 (fr) 1989-06-23 1989-06-23 Procede de fabrication d'un element de fermeture dit a ouverture controlee d'une boite metallique et element de fermeture obtenu selon ce procede
FR8908413 1989-06-23

Publications (2)

Publication Number Publication Date
EP0404654A1 EP0404654A1 (fr) 1990-12-27
EP0404654B1 true EP0404654B1 (fr) 1992-04-01

Family

ID=9383078

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90401703A Expired - Lifetime EP0404654B1 (fr) 1989-06-23 1990-06-18 Procédé de fabrication d'un élément de fermeture dit à ouverture contrôlée d'une boîte notamment métallique, élément de fermeture obtenu selon ce procédé et boîte en comportant application

Country Status (17)

Country Link
US (1) US5156511A (hu)
EP (1) EP0404654B1 (hu)
JP (1) JP2846931B2 (hu)
AT (1) ATE74320T1 (hu)
BR (1) BR9002955A (hu)
CA (1) CA2019608C (hu)
CZ (1) CZ287655B6 (hu)
DD (1) DD296015A5 (hu)
DE (1) DE69000054D1 (hu)
DK (1) DK0404654T3 (hu)
ES (1) ES2032149T3 (hu)
FR (1) FR2648791B1 (hu)
GR (1) GR3005078T3 (hu)
HU (1) HU213753B (hu)
RO (1) RO114435B1 (hu)
RU (1) RU2036043C1 (hu)
ZA (1) ZA904813B (hu)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29609130U1 (de) * 1996-05-21 1997-09-18 Rasselstein Hoesch GmbH, 56564 Neuwied Leicht zu öffnender Dosendeckel
AU2005206169A1 (en) * 2004-01-16 2005-08-04 William M. Heyn Angled sealing surface for container end panel

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1863337A (en) * 1930-04-04 1932-06-14 R B Davis Company Method of manufacturing can closures
US1847108A (en) * 1930-04-04 1932-03-01 R B Davis Company Method of manufacturing can closures
US1866469A (en) * 1930-04-04 1932-07-05 R B Davis Company Method of forming can closures
US1848012A (en) * 1930-04-04 1932-03-01 R B Davis Company Method of manufacturing can closures
US2274819A (en) * 1939-07-19 1942-03-03 Becker Rebecca Closure
US2884699A (en) * 1955-10-27 1959-05-05 Eisele Andrew Bore concentricity gauge holder
US3070058A (en) * 1957-04-01 1962-12-25 Bendix Corp Process of manufacture for master cylinder filler caps
US3142412A (en) * 1962-12-12 1964-07-28 American Can Co Opening means for sealed containers
US3343713A (en) * 1965-01-29 1967-09-26 Ermal C Fraze Easy opening can end
US3575122A (en) * 1968-07-03 1971-04-13 Stanray Corp Methods of constructing a hatch frame and cover therefor
JPS61176434A (ja) * 1985-01-31 1986-08-08 Nippon Steel Corp 開缶性および耐応力腐食割れ特性の優れたイ−ジ−オ−プン缶蓋
JPS61180626A (ja) * 1985-02-05 1986-08-13 Nissin Food Prod Co Ltd 食品容器の製造方法
JPS6322345A (ja) * 1986-07-08 1988-01-29 東洋製罐株式会社 ３ピ−ス罐及びその製造方法
JPS63178942A (ja) * 1986-12-27 1988-07-23 川鉄テクノリサ−チ株式会社 アルミニウム被覆鋼板製の缶ボデイ−を用いたイ−ジ−オ−プン缶

Also Published As

Publication number Publication date
CA2019608A1 (fr) 1990-12-23
JP2846931B2 (ja) 1999-01-13
DE69000054D1 (de) 1992-05-07
US5156511A (en) 1992-10-20
HU903919D0 (en) 1990-11-28
CS312290A3 (en) 1991-11-12
CA2019608C (fr) 1999-04-27
ZA904813B (en) 1992-02-26
JPH03124335A (ja) 1991-05-27
ES2032149T3 (es) 1993-01-01
RU2036043C1 (ru) 1995-05-27
CZ287655B6 (cs) 2001-01-17
HU213753B (en) 1997-09-29
DK0404654T3 (da) 1992-07-27
BR9002955A (pt) 1991-08-20
EP0404654A1 (fr) 1990-12-27
RO114435B1 (ro) 1999-04-30
ATE74320T1 (de) 1992-04-15
DD296015A5 (de) 1991-11-21
GR3005078T3 (hu) 1993-05-24
HUT56031A (en) 1991-07-29
FR2648791A1 (fr) 1990-12-28
FR2648791B1 (fr) 1991-11-29

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