EP0564725B1 - Fermeture à ouverture facile, résistante aux chocs, et procédé pour sa fabrication - Google Patents

Fermeture à ouverture facile, résistante aux chocs, et procédé pour sa fabrication Download PDF

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Publication number
EP0564725B1
EP0564725B1 EP92303044A EP92303044A EP0564725B1 EP 0564725 B1 EP0564725 B1 EP 0564725B1 EP 92303044 A EP92303044 A EP 92303044A EP 92303044 A EP92303044 A EP 92303044A EP 0564725 B1 EP0564725 B1 EP 0564725B1
Authority
EP
European Patent Office
Prior art keywords
tab
lid
recess
score
top plate
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
EP92303044A
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German (de)
English (en)
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EP0564725A1 (fr
Inventor
Shinya Tominaga
Joji Ito
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.)
Toyo Seikan Group Holdings Ltd
Original Assignee
Toyo Seikan Kaisha 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 Toyo Seikan Kaisha Ltd filed Critical Toyo Seikan Kaisha Ltd
Priority to EP92303044A priority Critical patent/EP0564725B1/fr
Publication of EP0564725A1 publication Critical patent/EP0564725A1/fr
Application granted granted Critical
Publication of EP0564725B1 publication Critical patent/EP0564725B1/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
    • B65D17/28—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
    • B65D17/4012—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 for opening partially by means of a tearing tab

Definitions

  • the present invention relates to an easy-open can lid for a container, and in particular, to an easy open can lid which is of the pull-open type having an opening piece adapted to be easily pushed down by the front end of a tab so as to have a push-open type function.
  • a can lid of the type having an opening piece which incorporates a part that is maintained to be connected to the top plate of a can so as to prevent the opening piece from being completely removed from the top lid plate of the can has been proposed.
  • the opening piece having a sharp broken end edge is positioned facing the tip of the drinker's nose, inevitably causing an uncomfortable feeling so as to be undesirable for the user.
  • the opening piece can be pushed in by a human finger so as to be dangerous. Further, should the finger be dirty, a hygiene problem would be presented.
  • a pull-open type easy-open can lid for a container having a push-open opening piece with a tab so as to exhibit a push open type function while the opening piece is not completely removed from the top plate of the container, with no risks of uncomfortable feeling and no hygiene problem as mentioned above, has lately attracted considerable attention.
  • Cans of are kinds have been heretofore used as internally pressurized cans. However, a requirement for using them as internally depressurized cans has been more and more increased as they have been widely used.
  • a depressurized can tends to cause a rupture along a score line on the top plate of the can due to a water hammer phenomenon such that the top plate of the can which is concaved inwardly due to a pressure differential between the inside and outside of the can, is pressed outwardly by liquid in the can which is forced up when the can is dropped onto the ground. That is, the water hammer exerts a shearing stress on the score line thereby causing the top plate to rupture along the line so that the can is accidentally opened.
  • the tab makes close contact with the top plate of the can, and accordingly, it is hard to pick and pull up the tab.
  • Japanese Utility Model Examined Publication No. 63-23316 discloses a can lid in which deep and shallow recesses are formed on the top plate of a can underneath the nose of a tab.
  • the front end part of the tab nose which is rectangular depresses an opening piece, one of the corners of the rectangular end part of the tab nose enters into the deep recess without making contact with the top plate while the other corner enters into the shallow recess, thereby it is possible to easily pick and pull up the tab to some extent.
  • the depression force acts at length as a force for rupturing the score line. That is, a part of the depression force is inevitably consumed for deformation of the recesses so as to offer such a drawback that an extra force is required for opening the lid. Further, since the force application point, the fulcrum point and the acting point are not on one and the same straight line, the depression force cannot be concentrated.
  • the conventional non-separable tab type can lid which is a pull-open type, incorporating an opening piece having a push-open type function has offered such a drawback that it has less drop-proof strength and it is difficult to be opened.
  • US 4024981 describes a can lid having the features of the preamble of claim 1, together with a recess in the top plate beneath one corner of a rectangular tab nose. A lid of this type is described later with reference to figures 8-10.
  • US 4930658 shows another type of can lid which does not have any recess below the tab nose.
  • the present invention is devised in order to eliminate the above-mentioned drawbacks inherent in the prior art, and accordingly one object of the present invention is to provide an easy-open can lid which has a sufficient drop-proof strength even though it is used for an internally depressurized can while ensuring a gap between the nose part of the tab and the top plate of the can so as to facilitate the pull-up of the tab, and which can concentrate a depression force exerted through the tab nose, to an opening piece, thereby making it possible to open the can lid with a small force.
  • the other object of the present invention is to provide such an arrangement that a human finger can securely catch the lower surface of a finger hook part of the tab in order to facilitate initial rupture upon opening the lid.
  • a can lid according to claim 1.
  • the bottom surface of the tab nose recess is flat.
  • the bottom surface of the tab nose recess is inclined.
  • the bottom of the tab nose recess is an inverted conical inclined surface defined by a plurality of inclined surfaces, having a lowest part with which the tab nose is adapted to make contact.
  • a narrow buffer zone is provided in the tab nose recess between a part of its outer peripheral edge on the rivet side and a part of the score near the rivet.
  • the buffer zone has a width of 0.5 to 5 mm.
  • both start and end points or the score are located on one and the same side of the rivet in front of the latter with the hinge space being formed therebetween.
  • concave and convex beads are formed in the opening piece surrounded by the score.
  • a tab pinch part having one end part which is slightly curved upward is provided at one end part of the tab on the side remote from the tab nose.
  • a tab pinch recess is formed in the top plate of a can underneath the tab pinch part.
  • a narrow buffer zone is formed in the tab nose recess between a part of its outer peripheral edge on the rivet side and a part of the score near the rivet.
  • the first feature of the present invention is the provision of the tab nose having its tip end which is arcuate.
  • the bottom surface of the recess which is distant from the start and end points of the score is pressed downward, and therefore it is possible to prevent such a risk that the hinge part between the start and end points of the score is broken.
  • the arcuate tip of the tab nose can increases its rigidity, and accordingly, it is possible to prevent the tab nose from being bent.
  • Another feature of the present invention is the provision of the generally semicircular tab nose recess formed in the top plate of a can and having a smooth bottom surface with no step part, for receiving the tab nose when the tab pinch part is pulled up.
  • the tab nose can be lowered upon pulling up the tab pinch part, a human finger can easily catch the pull-up end thereof, and accordingly, a sufficient pull-up force can be applied thereto.
  • the tab pinch part can be pulled up until the arcuate tip of the tab nose abuts against the bottom of the recess.
  • the third feature of the present invention is the provision of the tab nose recess having a smooth bottom surface with no step part. From the study made by the applicants, it is found that should a step part exist on the bottom surface of the tab nose recess, a depression force through the tab nose which is pushed down would be absorbed by deformation of the step part since the step part is deformed largely, and accordingly, no actual depression force for rupturing the score is effected until the step part is eliminated. Accordingly, since a part of the applied force is not used for opening the can lid, a larger force is required for opening the can lid.
  • the bottom surface of the tab nose recess may be flat or inclined. Further, in the case of a plurality of inclined surfaces defining the tab nose recess, it is preferable to allow the tip of the nose part to make contact with the lowest part of the recess since this part is most effective to serve as the acting point at which the depression force can be concentrated.
  • the fourth feature of the present invention is the provision of the tab nose recess which can prevent the score from being ruptured due to the water hammer phenomenon which is caused when the can is dropped.
  • the liquid contents in the can jumps up within the can when the can is dropped onto the ground, and pressurizes the can so as to give rise to the so-called water hammer phenomenon which applies a shock to the can lid.
  • the coining process of forming a score line in the can lid drives metal toward both sides of the score so that the metal plate surrounded by the score is remarkably bulged out by the metal which has been driven away by coining the score so as to give rise to the so-called redundant metal phenomenon.
  • the provision of the tab nose recess according to the present invention can absorb redundant metal build up during formation of the score or the like so that no redundant metal is present in the can lid, and accordingly, the expansion of the can upon dropping of the can onto the ground can be reduced, thereby it is possible to prevent the score from being ruptured. Further, since the tab nose recess having a smooth bottom surface with no step part is formed along a part of the score on the rivet side where rupture of the score is most likely to occur, it is possible to prevent rupture of the score.
  • the fifth feature of the present invention is the provision of the tab nose recess which is formed in the top plate of the can within the part surrounded by the score, corresponding to the opening piece, and accordingly, the opening piece can has a certain rigidity which can prevent hindrance to breakage of the score, the hindrance being caused by deformation of the opening piece by depression of the tab nose and absorbing the depression force.
  • the sixth feature of the present invention is the provision of the buffer zone between the recess having the smooth bottom surface with no step, and a part of the score near the rivet.
  • the tab nose recess can prevent the score from being accidentally ruptured by the water hammer and can manage the concentration of the depression force by the tab nose for obtaining an effective can opening force.
  • the buffer zone is provided, according to the present invention, between a part of the peripheral edge of the recess and a part of the score on the rivet side, the width of the buffer zone being preferably from 0.5 to 5 mm, and in particular, most preferably from 1.5 to 2.5 mm.
  • the width of the buffer zone be smaller than that mentioned above, the score would be accidentally ruptured during formation of the score. Further, should the width of the buffer zone be larger than that, it is not possible to obtain a shock absorbing effect.
  • the seventh feature of the present invention is the provision of the end part of the tab pinch part which is slightly bent upward so as to be easily caught by a human finger when the tab pinch part is raised.
  • the eighth feature of the present invention is the provision of the tab pinch recess in the top plate of the can underneath the end part of the tab pinch part in the can lid.
  • the human finger can easily catch the tab when the latter is raised, and accordingly, the opening of the can be easily made.
  • the ninth feature of the present invention is the provision of the tab nose recess which is prepared after the score is formed.
  • the tab nose recess according to the present invention should not be deep since the constraint by the fulcrum point would decrease so that the can opening effect becomes less if it is excessively deep. Further, it should not be shallow since the can opening effect and the water hammer resistance becomes less if it is excessively shallow.
  • the depth of the recess depends upon the length of the tab nose measured from the rivet. An effective advantage can be found if the length of the nose from the rivet is in a range 7 to 9 mm while the depth of the recess is in a range of 0.2 to 1.0 mm. However, the depth of the recess is preferably in a range of 0.4 to 0.6 mm. Further, a most effective advantage can be obtained if the length of the nose from the rivet is 8 mm while the depth of the recess is 0.5 mm.
  • the tab pinch recess occupies the extent of 10 mm in the outer peripheral direction from a position just below the tip of the tab pinch part while the depth of the tab pinch recess is preferably in the range of 0.2 to 1.0 mm. In this range, no interference with the tab occurs even though several cans are stacked one upon another, thereby it is possible to prevent the bottom of each can form being scratched.
  • Fig. 1 shows the front surface of the can lid in a first embodiment form of the present invention.
  • a can lid 10 in which a top plate recess 12 is formed being extended across the center of the top plate 11.
  • a tab 20 having a tab nose 21 is fixed to a substantially central part of the top plate 11 by a rivet 13 within the recess 12.
  • the tab nose 21 is in an arcuate shape.
  • a generally semicircular tab nose recess 19 having a smooth bottom surface with no step part is formed in the top plate 11 underneath the tab nose 21 and along a part of a score 15 on the rivet 13 side.
  • the score 15 is extended along the periphery of the recess 12 from a position in front of the rivet 13, surrounding the tab nose recess 19 so as to define an opening piece 18.
  • a bead 14 is formed on the opening piece is in front of the tab nose recess 19 in order to increase the rigidity of the opening piece 18.
  • Fig. 2 which shows the rear surface of the can lid shown in Fig. 1, it is clearly understood that the score extends from the point in front of the rivet 13, surrounding the opening piece 18 with substantially one complete loop.
  • the score has a start point 16 and an end point 17.
  • the space between the start point 16 and the end point on the top plate 11 still remains without being cut so as to serve as a hinge connecting the opening piece 18 to the top plate 11, that is, the space functions to prevent the opening piece from being separated from the can lid. Accordingly, the pollution cause by separated tabs which have been thrown away is prevented. Since the tab nose has an arcuate shape so that a depression force can be concentrated to the front end thereof, and since the force concentrated point is distant from the hinge, the hinge is never broken.
  • a tab pinch recess 23 is formed on the top plate 11 underneath a tab pinch part of the tab 20. Upon pulling up the tab 20, if a human finger is inserted in the tab pinch recess 23, it can easily catch the tab pinch part so as to facilitate the pull-up of the tab 20.
  • a buffer zone 25 is formed on the top plate 11 between a part of the score 15 near the rivet 13 and a part of the outer periphery of the recess 19 for absorbing a shock under the water hammer phenomenon, on the rivet side in order to prevent the score from being ruptured under the water hammer phenomenon.
  • Fig. 3 which is a sectional view along line I-I' in Fig. 1, it is understood that the tab nose recess 19 has a smooth bottom surface with no step part. Since no step part is present, the tab nose 21 directly presses the bottom surface when the opening piece 18 is depressed, and accordingly, the depression force can be used in its entirety for opening the can. Should a step part be present, the depression force would be absorbed through deformation of the step part which decreases the rigidity of the opening piece, as mentioned above, and accordingly, the force used for opening the can is decreased, and accordingly, such a disadvantage that a large force and extra time are required for opening the can.
  • tab pinch part is slightly raised upward and since the tab pinch recess 23 is formed on the top plate 11 below the pinch part of the tab, a human finger can be easily inserted below the tab pinch part.
  • a rupturing force directly acts upon the opening piece from the front end of the tab so that the score is ruptured appropriately. Since the opening end piece has a large rigidity and is not bent, the opening of the can be facilitated. Further, since the tab nose never abuts against the hinge between the start point and the end point of the score, no depression force is exerted to the hinge which is therefore not broken. Further, there is obtained the excellent advantage that the pull-up of the tab can be facilitated.
  • FIG. 4 this is a sectional view illustrating a can lid in another embodiment of the present invention.
  • the bottom surface of the tab nose recess is inclined. Further, also in this embodiment, no step part is presented in the bottom surface of the recess. In the case of more than two inclined surfaces defining the bottom of the recess, it is optimum that the front end of the tab nose comes into contact with the lowest point given by these inclined surface. Even in this case, no step part should be presented in the bottom of the recess.
  • Figs. 5 to 7 show a conventional can lid disclosed in Japanese Kokoku (examined) Utility Model Publication No. 63-233316
  • Figs. 8 to 10 show a can lid disclosed in Japanese Kokoku Patent Publication No. 57-42545. Both can lids were used for the comparison.
  • a recess 19 is formed on the top plate of a can underneath one of the corners of a rectangular tab nose, and accordingly, this corner is received in the recess 19 so as to prevent the corner from making contact with the top plate when the can lid is opened.
  • a shallow recess is formed on the top plate adjacent to the recess which is adapted to receive the tab nose that is depressed, in order to prevent the tab pinch part from making close contact with the top plate. And thereby it is possible to facilitate the pull-up of the pinch part 22 of the tab.
  • the depression is carried out only with one of the corners of the rectangular tab nose, the force application point, the fulcrum point and the acting point do not fall on one and the same straight line.
  • the depression force can not be concentrated.
  • a step part which is formed between the shallow recess and the deep recess absorbs the depression force upon opening of the can, there is presented such a disadvantage that a large force and a longer time are required for opening the can.
  • a recess 19 is formed on the top plate below one of the corners of the rectangular tab nose.
  • a can lid as shown in Figs. 5 to 7 was prepared as a comparison example 1.
  • the depth of the deep recess is 0.6 mm while the depth of the shallow recess is 0.4 mm with the step part therebetween having a height of 0.2 mm.
  • the can is made of steel, having an internal volume of 250 ml and a side wall thickness of 0.1 mm.
  • the top plate is made of aluminum having a thickness of 0.3 mm.
  • the diameter of the can lid is 60 mm, and the remaining thickness of the top plate along the score is 120 ⁇ m.
  • a can lid as shown in Figs. 8 to 10 was prepared as a comparison example 2.
  • the depth of the recess is 0.6 mm.
  • This can has an internal volume of 350 ml and is made of steel, having a side wall thickness of 0.1 mm.
  • the top plate is made of aluminum, having a thickness of 0.3 mm. Further, the can lid has an outer diameter of 60 mm, and the remaining thickness of the top plate along the score is 120 ⁇ m.
  • the outer peripheral edge of the recess 19 for absorbing the water hammer shock makes contact, on the rivet side, with a part of the score near to the rivet.
  • All cans for the first embodiment of the present invention,and as comparison examples which are the same as those used in the comparison test 1 were prepared. They were filled with pure water and were evacuated up to a vacuum degree of 40 cm Hg. In the tests, each can was fixed, and then the tab pinch part was pulled up so as to measure the force with which the rupture of the score is initiated. Further, the can opening chart was taken at the time of the rupture.
  • the can could be opened with a small force.
  • a force was required to eliminate the step part, and with the comparison example 2, it was difficult to pull-up the tab.
  • the comparison example 1 and 2 required forces which are larger than that for the first embodiment by 26 % and 37 %, respectively.
  • the present invention offers excellent can opening ability and water hammer resistance by the combination of the several features, and further, provides easy and safe handling.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)

Claims (12)

  1. Couvercle (10) de boíte, comprenant :
    une plaque supérieure (11) ayant un centre,
    une patte (20) ayant un nez (21) de patte et couplée pratiquement au centre de la plaque supérieure (11) par un rivet (13),
    une entaille (15) formée dans la plaque supérieure (11) et ayant un point initial (16) et un point final (17) avec un espace d'articulation entre eux,
    une pièce d'ouverture (18) entourée par l'entaille (15), la pièce d'ouverture (18) étant destinée à être enfoncée par le nez (21) de la patte afin que le couvercle (18) de la boíte soit ouvert et
    une cavité (19) de nez formée dans la pièce d'ouverture (18) sous le nez (21) de la patte, la cavité (19) ayant une surface inférieure lisse sans partie de gradin destinée à loger le bout courbe du nez (21) de la patte et étant repoussée par le bout lorsque la patte (20) est tirée vers le haut, caractérisée en ce que le nez (21) comporte un seul bout courbe placé à une première extrémité de la patte, et en ce que la cavité (19) du nez de la patte a une forme en demi-cercle ou est un segment de cercle plus petit qu'un demi-cercle, un coin de la cavité (19) étant adjacent à une partie de l'entaille (15).
  2. Couvercle (10) de boíte selon la revendication 1, dans lequel la surface inférieure de la cavité (19) du nez de la patte est plate.
  3. Couvercle (10) de boíte selon la revendication 1, dans lequel la surface inférieure de la cavité (19) du nez de la patte est inclinée.
  4. Couvercle (10) de boíte selon la revendication 1, dans lequel la surface inférieure de la cavité (19) du nez de la patte est une surface inclinée conique inversée qui est délimitée par plusieurs surfaces inclinées ayant une partie la plus basse avec laquelle est au contact le nez (21) de la patte.
  5. Couvercle (10) de boíte selon l'une quelconque des revendications précédentes, dans lequel la cavité (19) du nez de la patte a un bord périphérique externe, et une zone tampon (25) ayant une faible largeur est formée entre une partie du bord périphérique externe de la cavité (19) du nez de la patte du côté du rivet et une partie de l'entaille (15) proche du rivet (13).
  6. Couvercle (10) de boíte selon la revendication 5,, dans lequel la largeur de la zone tampon (25) est comprise entre 0,5 et 5 mm.
  7. Couvercle (10) de boíte selon l'une quelconque des revendications précédentes, dans lequel le point initial (16) et le point final (17) de l'entaille (15) sont placés sur l'un ou l'autre des côtés gauche et droit du rivet (13) afin que l'espace d'articulation soit délimité entre eux.
  8. Couvercle (10) de boíte selon l'une quelconque des revendications précédentes, dans lequel des cordons concave et convexe (14) sont formés sur la pièce d'ouverture (18) entourée par l'entaille (15).
  9. Couvercle (10) de boíte selon l'une quelconque des revendications précédentes, dans lequel la patte (20) possède, du côté distant du nez (21) de la patte, une partie (22) de pincement de patte ayant une partie d'extrémité légèrement recourbée vers le haut.
  10. Couvercle de boíte selon l'une quelconque des revendications précédentes, dans lequel une cavité (23) de pincement de patte est formée sur la plaque supérieure (11) sous la partie (22) de pincement de patte.
  11. Procédé de fabrication d'un couvercle (10) de boíte d'ouverture facile, comprenant les étapes suivantes :
    l'accouplement d'une patte (20) ayant un nez (21) de patte à une partie pratiquement centrale d'une plaque supérieure (11) d'une boíte par un rivet, le positionnement de points initial et final (16, 17) d'une entaille (15) sur la plaque supérieure (11) avec un espace utilisé comme articulation entre eux, la formation de l'entaille (15) par frappe, et la formation d'une cavité (19) de nez de patte ayant une surface inférieure lisse sans partie de gradin dans la plaque supérieure (11) dans une région entourée par l'entaille (15), caractérisé par la formation du nez (21) de la patte avec un seul bout courbe à une première extrémité de la patte (20) et la formation de la cavité (19) du nez de patte sous forme d'un demi-cercle ou d'un segment de cercle plus petit qu'un demi-cercle, un coin de la cavité (19) étant adjacent à une partie de l'entaille (15).
  12. Procédé de fabrication d'un couvercle (10) de boíte selon la revendication 11, dans lequel l'entaille (15) a une zone tampon étroite (25) qui est formée dans la plaque supérieure (11) entre une partie du bord périphérique externe de la cavité (19) du nez de la patte du côté du rivet et une partie de l'entaille (15) proche du rivet (13).
EP92303044A 1992-04-07 1992-04-07 Fermeture à ouverture facile, résistante aux chocs, et procédé pour sa fabrication Expired - Lifetime EP0564725B1 (fr)

Priority Applications (1)

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EP92303044A EP0564725B1 (fr) 1992-04-07 1992-04-07 Fermeture à ouverture facile, résistante aux chocs, et procédé pour sa fabrication

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Application Number Priority Date Filing Date Title
EP92303044A EP0564725B1 (fr) 1992-04-07 1992-04-07 Fermeture à ouverture facile, résistante aux chocs, et procédé pour sa fabrication

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EP0564725A1 EP0564725A1 (fr) 1993-10-13
EP0564725B1 true EP0564725B1 (fr) 1998-07-01

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USD387987S (en) 1996-11-14 1997-12-23 Metal Container Corporation End closure for a container
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US6024239A (en) * 1997-07-03 2000-02-15 American National Can Company End closure with improved openability
US6161717A (en) * 1999-02-05 2000-12-19 American National Can Company End closure with reverse bead on opening panel
ES1050274Y (es) * 2001-10-19 2002-12-01 Bontellasa S L Tapa para latas
US6761281B2 (en) 2002-11-26 2004-07-13 Rexam Beverage Can Company Modified score for smooth openability
EP2409925B1 (fr) 2010-07-19 2012-12-19 Red Bull GmbH Couvercle de gerbe refermable, gerbe, notamment cannettes de boisson, comprenant le couvercle de gerbe refermable, procédé de fabrication d'une telle gerbe et utilisation du couvercle de gerbe selon le procédé
EP2557050B1 (fr) 2011-08-10 2015-10-14 Red Bull GmbH Couvercle de gerbe et gerbe, notamment cannette à boisson comprenant ce couvercle de gerbe

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AU576900B2 (en) * 1984-10-01 1988-09-08 J Gadsden Proprietary Limited Easy-opening can end
US4930658A (en) * 1989-02-07 1990-06-05 The Stolle Corporation Easy open can end and method of manufacture thereof
DE3941239C1 (fr) * 1989-12-14 1991-06-27 Schmalbach-Lubeca Ag, 3300 Braunschweig, De

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