EP0256920B1 - Metal closure with a preincised opening panel - Google Patents

Metal closure with a preincised opening panel Download PDF

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Publication number
EP0256920B1
EP0256920B1 EP87401764A EP87401764A EP0256920B1 EP 0256920 B1 EP0256920 B1 EP 0256920B1 EP 87401764 A EP87401764 A EP 87401764A EP 87401764 A EP87401764 A EP 87401764A EP 0256920 B1 EP0256920 B1 EP 0256920B1
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EP
European Patent Office
Prior art keywords
cover
opening panel
axis
stamped
waves
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Expired - Lifetime
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EP87401764A
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German (de)
French (fr)
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EP0256920A1 (en
Inventor
Guy Bossert
Ferdinand Fily
Michel Leblois
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Franpac (sa)
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Franpac (sa)
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Publication of EP0256920A1 publication Critical patent/EP0256920A1/en
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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
    • B65D17/4011—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 completely by means of a tearing tab

Definitions

  • the present invention relates to a metal cover comprising an opening panel delimited by a pre-incision line.
  • the opening of the box is effected by pulling on a ring generally fixed at one end of the opening panel.
  • the opening panel comprises on a part of its surface at least one stamped area. This traction causes the opening panel to detach along the pre-incision line.
  • This pre-incision line is preferably made using knives which cut into the metal. During this operation, the metal is repelled and it is necessary to absorb the excess material to ensure a suitable appearance to the cover and good mechanical strength during its use. For this, ribs and stampings are produced in a conventional manner.
  • lids having stampings of conventional shape which have the same drawbacks as the ribbed covers parallel to the axis of traction.
  • control of the opening can be made more or less delicate depending on the mechanical qualities of material used for the construction of the cover, and a pull in a direction forming an angle too small with the plane of the cover leads to an additional effort. and, in some cases, almost blocking the opening.
  • the cover object of the present invention allows to significantly reduce the opening forces and to ensure a gentle detachment, absent of shaking and without risk of blocking.
  • the lateral edges relative to the tearing axis of the stamped area or areas have undulations in the plane of the cover.
  • These undulations can take the most diverse forms, regular or not, and constitute a line made of straight lines and curves alternately concave and convex. They can be periodic or not, and their amplitude can vary.
  • edge we mean the lateral limit between the stamped area and the non-stamped area.
  • the deep-drawn zone makes it possible to absorb the excess metal coming from the production of the pre-incision line.
  • the panel has a perfectly stretched surface and a neat presentation. It also provides the cover with sufficient flexibility to accept elastic deformations during the various mechanical operations to which the box is subjected (crimping, autoclave sterilization, handling, etc.).
  • the undulations of the stamped area considerably reduce the winding forces of the opening panel when pulling on the ring since there is no rib parallel to the winding direction capable of opposing the curvature of the panel opening in the detachment area.
  • the curved corrugation segments joining the corrugation segments substantially perpendicular to the axis of traction prevent the blocking of the opening by improperly controlled folding of the opening panel during a traction too parallel to the plane of the cover. .
  • the depth of the stamped area is usually constant.
  • the stamped area thus has a flat bottom with clean edges, a pleasant presentation Furthermore, the absence of embossment or vertical deformation of the stamped area avoids unwanted orientations of the forces exerted on the cover, resulting from the pulling pull .
  • the opening panel has a large stamped area delimited by two wavy edges.
  • Said stamped area can serve as a support for a label presenting the product contained in the box, or for engraved, stamped or printed inscriptions.
  • the pulling ring will be fixed by a rivet or a weld on the opening panel and will have a width slightly greater than the spacing of the edges of the stamped area so as to rest on the edges of the part of the panel not stamped and to facilitate gripping in order to open the box.
  • the opening panel comprises several stamped zones in hollow or in relief, separated or joining together, and forming beads with wavy lateral edges oriented substantially along the axis of traction.
  • the two edges of each of the beads have oscillations in phase opposition and thus produce beads of variable width.
  • the box (1) is of conventional construction and comprises a side wall and a bottom. Its shape is arbitrary and can be both cylindrical and parallelepiped.
  • the box is closed at its upper part by a crimped cover (2).
  • This cover has a weakening line (3) running a short distance from its upper edge (4).
  • This pre-incision line (3) delimits an opening panel (5) comprising a stamped part (6).
  • the depth of the stamped area (6) usually constant, is advantageously between a few tenths of a millimeter to a few millimeters. Its edges, limiting the stamped area (6) of the remainder of the opening panel (5), have a substantially rounded profile along the lower and upper edges and substantially straight between these two areas.
  • the opening panel (5) comprises a ring (7) fixed by a rivet (8) and extended by a perforation nose (9).
  • the ring rests on either side on the edges of the non-stamped central area (11) and (12), so as to present a grip zone (130 under which the user can easily slide a finger in order to grasp the ring (7) and, by its pivoting around the rivet (8), perforate the pre-incision line with the perforation nose.
  • the stamped area (6) consists of a bead (14) whose side edges (10) are wavy.
  • the wavy edges (10) of the stamped area (6) are in phase opposition and form a bead of variable width (14).
  • a bead with a width of between 5 and 10 mm is made on the opening panel running along the pre-incision zone and whose parallel edges have an undulation with a wavelength between 8 and 10 mm and an amplitude between 2 and 6 mm.
  • the axis of the corrugation (16) denotes the median axis passing through the middle of the undulations of a corrugated edge (10) and the term "amplitude" means the maximum deviation of the undulations of this edge (10) with this axis d ripple, measured along a perpendicular axis called the amplitude axis (15).
  • the opening panel comprises a cord whose width varies periodically between a minimum value of 2 to 4 mm and a maximum value of between 10 and 15 mm, with a wavelength of 8 to 10 mm.
  • the central panel has a large stamped area, the edges of which have undulations of an amplitude of 4 to 8 mm and a wavelength of 8 to 10 mm.
  • the amplitude of the corrugations or their wavelength vary according to the geometry of the cover and the nature of the material from which it is made.
  • the undulations form straight line segments substantially perpendicular to the tearing axis connected by curves of continuous curvature turning their concavity towards the two straight line segments which they connect.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Cookers (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Auxiliary Devices For Machine Tools (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)

Description

La présente invention concerne un couvercle métallique comportant un panneau d'ouverture délimité par une ligne de pré-incision. L'ouverture de la boîte s'effectue par traction sur un anneau fixé généralement à une des extrémités du panneau d'ouverture. Le panneau d'ouverture comporte sur une partie de sa surface au moins une zone emboutie. Cette traction provoque le détachement du panneau d'ouverture le long de la ligne de pré-incision.The present invention relates to a metal cover comprising an opening panel delimited by a pre-incision line. The opening of the box is effected by pulling on a ring generally fixed at one end of the opening panel. The opening panel comprises on a part of its surface at least one stamped area. This traction causes the opening panel to detach along the pre-incision line.

Cette ligne de pré-incision est préférablement réalisée à l'aide de couteaux qui entament le métal. Lors de cette opération, le métal est repoussé et il est nécessaire d'absorber l'excédent de matière pour assurer un aspect convenable au couvercle et une bonne tenue mécanique lors de son utilisation. Pour cela on réalise de façon classique des nervures et des emboutis.This pre-incision line is preferably made using knives which cut into the metal. During this operation, the metal is repelled and it is necessary to absorb the excess material to ensure a suitable appearance to the cover and good mechanical strength during its use. For this, ribs and stampings are produced in a conventional manner.

On connait dans l'état de la technique de nombreux couvercles présentant une nervure qui longe le bord du couvercle le long de la ligne de pré-incision. Ces couvercles présentent l'inconvénient majeur d'une grande rigidité, car les tronçons des nervures parallèles à la ligne de pré-incision s'opposent à la courbure du panneau d'ouverture. L'effort de l'utilisateur est réparti sur une grande longueur de la ligne de pré-incision et l'ouverture nécessite une force non négligeable.Many covers are known in the state of the art having a rib which runs along the edge of the cover along the pre-incision line. These covers have the major drawback of great rigidity, since the sections of the ribs parallel to the pre-incision line oppose the curvature of the opening panel. The user's effort is distributed over a long length of the pre-incision line and the opening requires a significant force.

On a proposé dans la demande européenne 061 980 de pratiquer des points d'affaiblissement dans la nervure longeant la ligne de pré-incision. Cette solution évite que la traction exercée par l'utilisateur soit répartie sur une grande longueur du panneau d'ouverture mais provoque des sauts dans le détachement du panneau d'ouverture occasionnant un contrôle délicat du geste d'ouverture.It has been proposed in European application 061 980 to practice weakening points in the rib along the pre-incision line. This solution prevents the traction exerted by the user from being distributed over a long length of the opening panel but causes jumps in the detachment of the opening panel causing delicate control of the opening gesture.

On connaît d'autres de couvercles présentant des nervures perpendiculaires à l'axe de traction. Ces couvercles sont décrits entre autres dans les brevets français 1561 840 et 2 000 528.Others are known of covers having ribs perpendicular to the axis of traction. These covers are described, inter alia, in French patents 1,561,840 and 2,000,528.

Ces couvercles présentent l'inconvénient de ne pas résorber suffisamment le métal dans l'axe perpendiculaire à l'axe de traction. On connaît également des couvercles présentant des emboutis de forme classique qui présentent les mêmes inconvénients que les couvercles à nervures parallèles à l'axe de traction.These covers have the disadvantage of not sufficiently absorbing the metal in the axis perpendicular to the axis of traction. Also known are lids having stampings of conventional shape which have the same drawbacks as the ribbed covers parallel to the axis of traction.

De plus, le contrôle de l'ouverture peut être rendu plus ou moins délicat suivant les qualités mécaniques de matériau utilisé pour la construction du couvercle, et une traction dans une direction formant un angle trop faible avec le plan du couvercle conduit à un effort supplémentaire et, dans certains cas, à un quasi blocage de l'ouverture.In addition, the control of the opening can be made more or less delicate depending on the mechanical qualities of material used for the construction of the cover, and a pull in a direction forming an angle too small with the plane of the cover leads to an additional effort. and, in some cases, almost blocking the opening.

Le couvercle objet de la présente invention permet de réduire notablement les efforts d'ouverture et d'assurer un détachement doux, absent de secousses et sans risques de blocage.The cover object of the present invention allows to significantly reduce the opening forces and to ensure a gentle detachment, absent of shaking and without risk of blocking.

Selon l'invention les bords latéraux par rapport à l'axe d'arrachement de la ou des zones embouties présentent des ondulations dans le plan du couvercle. Ces ondulations peuvent prendre les formes les plus diverses, régulières ou non, et constituent une ligne faite de segments de droites et de courbes alternativement concaves et convexes. Elles peuvent être périodiques ou non, et leur amplitude peut varier. Par bord, on entendra la limite latérale entre la zone emboutie et la zone non emboutie.According to the invention, the lateral edges relative to the tearing axis of the stamped area or areas have undulations in the plane of the cover. These undulations can take the most diverse forms, regular or not, and constitute a line made of straight lines and curves alternately concave and convex. They can be periodic or not, and their amplitude can vary. By edge, we mean the lateral limit between the stamped area and the non-stamped area.

La zone emboutie permet de résorber l'éxcédent de métal provenant de la réalisation de la ligne de pré-incision. Le panneau présente une surface parfaitement tendue et une présentation soignée. Elle assure également au couvercle une souplesse suffisante pour accepter de façon élastique les déformations lors des différentes opérations mécaniques auxquelles la boîte est soumise (sertissage, stérilisation à l'autoclave, manutention etc...).The deep-drawn zone makes it possible to absorb the excess metal coming from the production of the pre-incision line. The panel has a perfectly stretched surface and a neat presentation. It also provides the cover with sufficient flexibility to accept elastic deformations during the various mechanical operations to which the box is subjected (crimping, autoclave sterilization, handling, etc.).

Les ondulations de la zone emboutie réduisent considérablement les efforts d'enroulement du panneau d'ouverture lors de la traction sur l'anneau puisqu'il n'existe aucune nervure parallèle au sens d'enroulement susceptible de s'opposer à la courbure du panneau d'ouverture dans la zone de détachement. De plus, les segments d'ondulation courbes réunissant les segments d'ondulation sensiblement perpendiculaires à l'axe de traction empêchent le blocage de l'ouverture par pliage mal contrôlé du panneau d'ouverture lors d'une traction trop parallèle au plan du couvercle.The undulations of the stamped area considerably reduce the winding forces of the opening panel when pulling on the ring since there is no rib parallel to the winding direction capable of opposing the curvature of the panel opening in the detachment area. In addition, the curved corrugation segments joining the corrugation segments substantially perpendicular to the axis of traction prevent the blocking of the opening by improperly controlled folding of the opening panel during a traction too parallel to the plane of the cover. .

La profondeur de la zone emboutie est habituellement constante.The depth of the stamped area is usually constant.

La zone emboutie présente ainsi un fond plat à bord francs,d'une présentation agréable Par ailleurs, l'absence de bosselage ou déformation verticale de la zone emboutie évite les orientations indésirables des efforts exercés sur le couvercle, résultant de la traction d'arrachage.The stamped area thus has a flat bottom with clean edges, a pleasant presentation Furthermore, the absence of embossment or vertical deformation of the stamped area avoids unwanted orientations of the forces exerted on the cover, resulting from the pulling pull .

Selon un mode de réalisation préféré, le panneau d'ouverture comporte une large zone emboutie délimitée par deux bords ondulés. Ladite zone emboutie peut servir de support à une étiquette présentant le produit contenu dans la boîte, ou à des inscriptions gravées, embouties ou imprimées.According to a preferred embodiment, the opening panel has a large stamped area delimited by two wavy edges. Said stamped area can serve as a support for a label presenting the product contained in the box, or for engraved, stamped or printed inscriptions.

L'anneau de traction sera fixé par un rivet ou une soudure sur le panneau d'ouverture et aura une largeur légèrement supérieure à l'écartement des bords de la zone emboutie de façon à reposer sur les bords de la partie du panneau non emboutie et à faciliter ainsi la préhension en vue de l'ouverture de la boîte.The pulling ring will be fixed by a rivet or a weld on the opening panel and will have a width slightly greater than the spacing of the edges of the stamped area so as to rest on the edges of the part of the panel not stamped and to facilitate gripping in order to open the box.

Selon un autre mode de réalisation avantageux, le panneau d'ouverture comporte plusieurs zones embouties en creux ou en relief, séparées ou se rejoignant entre elles, et formant des cordons à bords latéraux ondulés orientés sensiblement suivant l'axe de traction.According to another advantageous embodiment, the opening panel comprises several stamped zones in hollow or in relief, separated or joining together, and forming beads with wavy lateral edges oriented substantially along the axis of traction.

Selon une variante de ce mode de réalisation, les deux bords de chacun des cordons présentent des oscillations en opposition de phases et réalisent ainsi des cordons à largeur variable.According to a variant of this embodiment, the two edges of each of the beads have oscillations in phase opposition and thus produce beads of variable width.

D'autres avantages et réalisations de l'invention ressortiront de la description qui va suivre et en se réferant aux dessins annexés sur lesquels :

  • La figure 1 représente une vue en plan d'un premier exemple de réalisation d'une boîte munie d'un couvercle selon l'invention.
  • La figure 2 représente une vue en coupe du couvercle précité.
  • La figure 3 représente une vue en plan d'un deuxième exemple de réalisation.
  • La figure 4 représente une vue en plan d'un troisième exemple de réalisation.
Other advantages and embodiments of the invention will emerge from the description which follows and with reference to the appended drawings in which:
  • Figure 1 shows a plan view of a first embodiment of a box with a cover according to the invention.
  • Figure 2 shows a sectional view of the above cover.
  • FIG. 3 represents a plan view of a second exemplary embodiment.
  • FIG. 4 represents a plan view of a third exemplary embodiment.

La boîte (1) est de construction classique et comprend une paroi latérale et une fond. Sa forme est quelconque et peut être tant cylindrique que parallè- lépipédique. La boîte est fermée à sa partie supérieure par un couvercle (2) serti. Ce couvercle comporte une ligne d'affaiblissement (3) longeant à une distance faible son bord supérieure (4). Cette ligne de pré-incision (3) délimite un panneau d'ouverture (5) comportant une partie emboutie (6). La profondeur de la zone emboutie (6), habituellement constant, est avantageusement comprise entre quelques dixièmes de millimètres à quelques millimètres. Ses bords, limitant la zone emboutie (6) du restant du panneau d'ouverture (5), présentent un profil sensiblement arrondi le long des arêtes inférieures et supérieures et sensiblement rectiligne entre ces deux zones. Le panneau d'ouverture (5) comporte un anneau (7) fixé par un rivet (8) et prolongé par une nez de perforation (9). L'anneau repose de part et d'autre sur les bords de la plage centrale non emboutie (11) et (12), de façon à présenter une zone de préhension (130 sous laquelle l'utilisateur peut facilement glisser un doigt afin de saisir l'anneau (7) et, par son pivotement autour du rivet (8), perforer la ligne de pré-incision avec le nez de perforation.The box (1) is of conventional construction and comprises a side wall and a bottom. Its shape is arbitrary and can be both cylindrical and parallelepiped. The box is closed at its upper part by a crimped cover (2). This cover has a weakening line (3) running a short distance from its upper edge (4). This pre-incision line (3) delimits an opening panel (5) comprising a stamped part (6). The depth of the stamped area (6), usually constant, is advantageously between a few tenths of a millimeter to a few millimeters. Its edges, limiting the stamped area (6) of the remainder of the opening panel (5), have a substantially rounded profile along the lower and upper edges and substantially straight between these two areas. The opening panel (5) comprises a ring (7) fixed by a rivet (8) and extended by a perforation nose (9). The ring rests on either side on the edges of the non-stamped central area (11) and (12), so as to present a grip zone (130 under which the user can easily slide a finger in order to grasp the ring (7) and, by its pivoting around the rivet (8), perforate the pre-incision line with the perforation nose.

Selon un autre mode de réalisation représenté sur la figure 3, la zone emboutie (6) est constituée d'un cordon (14) dont les bords latéraux (10) sont ondulés. Selon une variante représentée en figure 4, les bords ondulées (10) de la zone emboutie (6) sont en opposition de phase et forment un cordon de largeur variable (14).According to another embodiment shown in Figure 3, the stamped area (6) consists of a bead (14) whose side edges (10) are wavy. According to a variant shown in Figure 4, the wavy edges (10) of the stamped area (6) are in phase opposition and form a bead of variable width (14).

Selon un exemple de réalisation, on réalise sur le panneau d'ouverture un cordon d'une largeur comprise entre 5 et 10mm longeant la zone de pré-incision et dont les bords parallèles présentent une ondulation d'une longueur d'onde comprise entre 8 et 10 mm et une amplitude comprise entre 2 et 6 mm.According to an exemplary embodiment, a bead with a width of between 5 and 10 mm is made on the opening panel running along the pre-incision zone and whose parallel edges have an undulation with a wavelength between 8 and 10 mm and an amplitude between 2 and 6 mm.

On désigne par axe d'ondulation (16) l'axe médian passant au milieu des ondulations d'un bord ondulé (10) et on entendra par "amplitude" l'écart maximum des ondulations de ce bord (10) avec cet axe d'ondulation, mesuré selon un axe perpendiculaire appelé axe d'amplitude (15).The axis of the corrugation (16) denotes the median axis passing through the middle of the undulations of a corrugated edge (10) and the term "amplitude" means the maximum deviation of the undulations of this edge (10) with this axis d ripple, measured along a perpendicular axis called the amplitude axis (15).

Selon un autre mode de réalisation, le panneau d'ouverture comporte un cordon dont la largeur varie périodiquement entre une valeur minimale de 2 à 4 mm et une valeur maximal comprise entre 10 et 15 mm, avec une longueur d'onde de 8 à 10 mm.According to another embodiment, the opening panel comprises a cord whose width varies periodically between a minimum value of 2 to 4 mm and a maximum value of between 10 and 15 mm, with a wavelength of 8 to 10 mm.

Selon un autre exemple de réalisation, le panneau central comporte une large zone emboutie dont les bords présentent des ondulations d'une amplitude de 4 à 8 mm et une longueur d'onde de 8 à 10 mm.According to another exemplary embodiment, the central panel has a large stamped area, the edges of which have undulations of an amplitude of 4 to 8 mm and a wavelength of 8 to 10 mm.

Selon d'autres exemples de réalisations, l'amplitude des ondulations ou leur longueur d'onde varient selon la géométrie du couvercle et la nature du matériau dans lequel il est constitué.According to other exemplary embodiments, the amplitude of the corrugations or their wavelength vary according to the geometry of the cover and the nature of the material from which it is made.

Selon un exemple préféré de réalisation, les ondulations forment des segments de droites sensiblement perpendiculaires à l'axe d'arrachement reliés par des courbes à courbure continue tournant leur concavité vers les deux segments de droites qu'elles relient.According to a preferred embodiment, the undulations form straight line segments substantially perpendicular to the tearing axis connected by curves of continuous curvature turning their concavity towards the two straight line segments which they connect.

Claims (11)

1. A cover having a pre-cut line limiting an opening panel provided at one end of a pulling means, characterized in that said opening panel (5) comprises on a portion of its surface at least one stamped zone (6) the side edges (10) of which are waved with respect to the tearing axis of the opening panel.
2. A cover as claimed in Claim 1, characterized in that the depth of the stamped zone is substantially constant.
3. A cover as claimed in Claims 1 or 2, characterized in that the amplitude axis (15) of said waves is substantially perpendicular to the tearing axis of the opening panel (5) and that the amplitude of said waves is such that one free zone at least is left between them.
4. A cover as claimed in Claims 1 to 3, characterized in that the wavelength of said waves is variable.
5. A cover as claimed in Claims 1 or 2, characterized in that the amplitude of the waves is variable.
6. A cover as claimed in Claims 1 or 2, characterized in that the wavelength of the waves is constant.
7. A cover as claimed in any Claim 1 to 6, characterized in that the wavelength is less than 15 mm.
8. A cover as claimed in any Claim 1 to 7, characterized in that the stamped zone or the stamped zones (6) form cords (14) the axis of which is oriented as the tearing axis and the edges (10) of which are waved.
9. A cover as claimed in Claim 8, characterized in the fact that said cords are connected together.
10. A cover as claimed in any Claim 1 to 9, characterized in that the waves have rectilinear portions.
11 . A cover as claimed in Claim 10, characterized in that said rectilinear portions are substantially perpendicular to the tearing axis and are connected together by continuously curved curves.
EP87401764A 1986-08-06 1987-07-28 Metal closure with a preincised opening panel Expired - Lifetime EP0256920B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8611414 1986-08-06
FR8611414A FR2602485B1 (en) 1986-08-06 1986-08-06 METALLIC COVER WITH PRE-INCISED OPENING PANELS

Publications (2)

Publication Number Publication Date
EP0256920A1 EP0256920A1 (en) 1988-02-24
EP0256920B1 true EP0256920B1 (en) 1990-01-31

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EP87401764A Expired - Lifetime EP0256920B1 (en) 1986-08-06 1987-07-28 Metal closure with a preincised opening panel

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EP (1) EP0256920B1 (en)
DE (1) DE3761548D1 (en)
ES (1) ES2003850B3 (en)
FR (1) FR2602485B1 (en)
PT (1) PT85492B (en)

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Publication number Priority date Publication date Assignee Title
GB2580900B (en) * 2019-01-23 2021-05-19 Crown Packaging Technology Inc Can end with ribs to increase panel stiffness

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CH551320A (en) * 1973-03-19 1974-07-15 Obrist Albert & Co CONTAINER PART, IN PARTICULAR A CONTAINER FOR POWDERY OR GRAY CONTENTS.
NZ191166A (en) * 1978-08-04 1983-06-17 M Joyce Easy-open container depressable sealing part
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FR2502122B1 (en) * 1981-03-20 1985-07-05 Cebal EASY OPENING COVER WITH PULL-OUT TONG AND INCISION LINE

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Publication number Publication date
FR2602485B1 (en) 1988-11-25
PT85492A (en) 1988-08-17
ES2003850B3 (en) 1990-05-01
ES2003850A4 (en) 1988-12-01
EP0256920A1 (en) 1988-02-24
FR2602485A1 (en) 1988-02-12
PT85492B (en) 1993-07-30
DE3761548D1 (en) 1990-03-08

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