EP0415819B1 - Couvercle métallique pour récipient étanche - Google Patents

Couvercle métallique pour récipient étanche Download PDF

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Publication number
EP0415819B1
EP0415819B1 EP90402322A EP90402322A EP0415819B1 EP 0415819 B1 EP0415819 B1 EP 0415819B1 EP 90402322 A EP90402322 A EP 90402322A EP 90402322 A EP90402322 A EP 90402322A EP 0415819 B1 EP0415819 B1 EP 0415819B1
Authority
EP
European Patent Office
Prior art keywords
central wall
projections
metal cover
skirt
cover according
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
EP90402322A
Other languages
German (de)
English (en)
Other versions
EP0415819A1 (fr
Inventor
Gérard Moreau
Bernard Lastapis
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.)
Crown European Holdings SA
Original Assignee
CarnaudMetalbox SA
Metal Box PLC
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 CarnaudMetalbox SA, Metal Box PLC filed Critical CarnaudMetalbox SA
Publication of EP0415819A1 publication Critical patent/EP0415819A1/fr
Application granted granted Critical
Publication of EP0415819B1 publication Critical patent/EP0415819B1/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
    • B65D43/00—Lids or covers for rigid or semi-rigid containers
    • B65D43/02—Removable lids or covers
    • B65D43/0202—Removable lids or covers without integral tamper element
    • B65D43/0233—Removable lids or covers without integral tamper element secured by rolling or other plastic deformation
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00064—Shape of the outer periphery
    • B65D2543/00074—Shape of the outer periphery curved
    • B65D2543/00092—Shape of the outer periphery curved circular
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00018—Overall construction of the lid
    • B65D2543/00259—Materials used
    • B65D2543/00277—Metal
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00342—Central part of the lid
    • B65D2543/00398—Reinforcing ribs in the central part of the closure
    • B65D2543/00407—Reinforcing ribs in the central part of the closure radial
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/0049—Contact between the container and the lid on the inside or the outside of the container on the inside, or a part turned to the inside of the mouth of the container
    • B65D2543/00509—Cup
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/00537—Contact between the container and the lid on the inside or the outside of the container on the outside, or a part turned to the outside of the mouth of the container
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00444—Contact between the container and the lid
    • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
    • B65D2543/00555—Contact between the container and the lid on the inside or the outside of the container on both the inside and the outside
    • 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
    • B65D2543/00—Lids or covers essentially for box-like containers
    • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
    • B65D2543/00953—Sealing means
    • B65D2543/00962—Sealing means inserted
    • B65D2543/00972—Collars or rings

Definitions

  • the invention relates to a metal cover for a sealed container, such as for example a metal bucket intended for the transport of hazardous materials; it relates more particularly to an improvement making it possible to improve the mechanical resistance of the cover, in particular with respect to the usual tests of drop and of resistance to internal pressure.
  • a metal cover is known, more particularly intended for sealingly closing a relatively large container.
  • a cover includes a central wall located below the top of a peripheral skirt fragmented externally so as to define crimping lugs.
  • the cover is provided with a rim with an inverted U-shaped radial profile, the crimping lugs being individualized in the outer annular wall of this rim.
  • a seal is housed in the peripheral space defined by the U-shaped rim.
  • the tabs are designed to be assembled to a rounded rim of the container (generally defined by a roll), by radial discharge towards the inside. This crimping has the effect of applying the seal against the rim of the container to ensure a tight closure.
  • the drop height test consists of dropping the closed container filled with 98% liquid (water) so that the edge of the lid hits the ground. This determines the height from which the container can fall under the most unfavorable conditions, without any loss of tightness.
  • the internal pressure test consists in gradually increasing the pressure in a container closed by such a lid until a leak is detected. The maximum pressure reached is thus noted.
  • the invention provides structural modifications which significantly improve the results of the tests mentioned above, at least.
  • the invention relates to a cover according to claim 1.
  • a peripheral groove is formed in said central wall and this groove extends between said skirt and said bosses.
  • these bosses are stamped hollow on the inner face of the central wall.
  • a metal cover 11 here with a generally circular outline, comprising a central wall 12 and a peripheral skirt 13 with a profile substantially in the shape of an inverted U, having a continuous annular apex 14 and an fragmented external wall 16 at the bottom so as to define a plurality of tabs crimping 17.
  • the cover is defined by stamping a sheet blank, so that said central part is below the top 14 of said skirt.
  • Each leg conventionally ends with an outside roll 17 a .
  • a seal 19 made of elastomeric material is housed in the vicinity of said apex inside the annular space defined by the skirt.
  • the tabs are intended to be assembled by crimping to a rounded rim of the container (not shown) generally embodied by another roll. More specifically, when the cover is in place on the rim of the container, said crimping is carried out by pushing back said tabs, radially inward, which has the effect of causing the compression of the seal against the surface of the rim of the container.
  • the central wall 12 is provided with bosses 20 produced by stamping and distributed, preferably regularly, in the vicinity of its periphery.
  • Each boss 20 in approximate segment shape is oriented substantially towards the middle of the central part 12, that is to say here substantially radially.
  • bosses are stamped hollow on the inner face of the central wall 12.
  • six bosses offset by 60 ° were made, but it is perfectly possible to envisage a different number of bosses, in particular a larger one number.
  • a peripheral groove 22 is formed, also by stamping, in the central wall. This groove extends between the skirt and said bosses. These are, moreover, arranged so as to start substantially from the internal edge of the groove 22.
  • the latter has a bowl-shaped profile, with a flat bottom and has an inner slope 23 which is lower than the exterior slope 23 b .
  • the gain on the internal pressure test is around 200 millibars. It is believed that the presence of the imprints, in particular, makes it possible to better distribute the deformation resulting from the internal pressure. This avoids the localized formation of a spoiler or a similar fold which could cause a leak.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Laminated Bodies (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Closing Of Containers (AREA)

Description

  • L'invention se rapporte à un couvercle métallique pour un récipient étanche, tel que par exemple un seau métallique destiné au transport de matières dangereuses; elle concerne plus particulièrement un perfectionnement permettant d'améliorer la résistance mécanique du couvercle, notamment vis-à-vis des tests habituels de chute et de résistance à la pression interne.
  • On connaît un couvercle métallique plus particulièrement destiné à fermer de façon étanche un récipient de relativement grande dimension. Un tel couvercle comprend une paroi centrale située en contrebas du sommet d'une jupe périphérique fragmentée extérieurement de façon à définir des pattes de sertissage. Autrement dit, le couvercle est pourvu d'un rebord à profil radial en U inversé, les pattes de sertissage étant individualisées dans la paroi annulaire extérieure de ce rebord. Un joint d'étanchéité est logé dans l'espace périphérique défini par le rebord à profil en U. Les pattes sont prévues pour être assemblées à un rebord arrondi du récipient (généralement défini par un roulé), par refoulement radial vers l'intérieur. Ce sertissage a pour effet d'appliquer le joint contre le rebord du récipient pour assurer une fermeture étanche.
  • Par ailleurs, le document US N° 1 507 561 décrit un couvercle du même genre adapté à la fermeture d'un tonneau de bois, selon la préambule de la revendication 1.
  • La résistance mécanique et l'étanchéité globale d'un tel récipient fermé par un couvercle de ce type sont appréciées par un certain nombre de tests pratiqués dans des conditions prédéterminées.
  • Le test de hauteur de chute consiste à laisser tomber le récipient fermé et rempli de liquide (de l'eau) à 98%, de façon que le bord du couvercle heurte le sol. On détermine ainsi la hauteur dont le récipient peut tomber dans les conditions les plus défavorables, sans aucune perte d'étanchéité.
  • Le test de pression interne consiste à augmenter progressivement la pression dans un récipient fermé par un tel couvercle jusqu'à ce qu'une fuite soit détectée. On note ainsi la pression maximum atteinte.
  • L'invention propose des modifications de structure qui améliorent notablement les résultats des tests mentionnés ci-dessus, au moins.
  • Dans cet esprit, l'invention concerne un couvercle selon la revendication 1.
  • Selon une caractéristique avantageuse de l'invention une gorge périphérique est pratiquée dans ladite paroi centrale et cette gorge s'étend entre ladite jupe et lesdits bossages. En outre, ces bossages sont emboutis en creux sur la face interne de la paroi centrale.
  • L'invention sera mieux comprise et d'autres avantages de celle-ci apparaîtront plus clairement à la lumière de la description qui va suivre d'un couvercle métallique conforme à son principe, donnée uniquement à titre d'exemple et faite en référence aux dessins annexés dans lesquels:
    • la figure 1 est une vue générale en perspective du couvercle conforme à l'invention; et
    • la figure 2 est une vue partielle en coupe radiale de ce même couvercle.
  • Sur les dessins, on a représenté un couvercle métallique 11, ici à contour globalement circulaire, comportant une paroi centrale 12 et une jupe périphérique 13 à profil sensiblement en forme de U renversé, présentant un sommet 14 annulaire, continu et une paroi extérieure 16 fragmentée à la partie inférieure de façon à définir une pluralité de pattes de sertissage 17. Le couvercle est défini par emboutissage d'un flan de tôle, de façon que ladite partie centrale soit en contrebas du sommet 14 de ladite jupe. Chaque patte se termine classiquement par un roulé extérieur 17a. Un joint 19 en matériau élastomère se trouve logé au voisinage dudit sommet à l'intérieur de l'espace annulaire défini par la jupe. Les pattes sont prévues pour être assemblées par sertissage à un rebord arrondi du récipient (non représenté) généralement matérialisé par un autre roulé. Plus précisément, lorsque le couvercle est en place sur le rebord du récipient, ledit sertissage s'effectue par refoulement desdites pattes, radialement vers l'intérieur, ce qui a pour effet de provoquer la compression du joint contre la surface du rebord du récipient.
  • Selon une caractéristique importante de l'invention, la paroi centrale 12 est pourvue de bossages 20 réalisés par emboutissage et répartis, de préférence régulièrement, au voisinage de sa périphérie. Chaque bossage 20 en forme approximative de segment est orienté sensiblement vers le milieu de la partie centrale 12, c'est-à-dire ici sensiblement radialement.
  • Les bossages sont emboutis en creux sur la face interne de la paroi centrale 12. Dans l'exemple représenté, on a pratiqué six bossages décalés de 60°, mais il est parfaitement possible d'envisager un nombre différent de bossages, notamment un plus grand nombre. De plus, une gorge périphérique 22 est pratiquée, également par l'emboutissage, dans la paroi centrale. Cette gorge s'étend entre la jupe et lesdits bossages. Ceux-ci sont d'ailleurs disposés de façon à partir sensiblement du bord interne de la gorge 22. Enfin, il est à noter que cette dernière a un profil en cuvette, à fond plat et présente un pente intérieure 23a plus faible que la pente extérieure 23b.
  • La structure décrite ci-dessus permet une amélioration du test de hauteur de chute de 40cm pour un récipient de 30cm de diamètre, soit pratiquement le double de ce qu'il était possible d'obtenir antérieurement. On peut sans doute attribuer ce résultat au fait que les empreintes se situant en dehors de l'impact de chute localisé sur le bord, les déformations du couvercle s'effectuent plus particulièrement vers l'extérieur et absorbent donc l'énergie de façon plus favorable, sans rupture d'étanchéité de l'assemblage couvercle-récipient.
  • Le gain au test de pression interne est d'environ 200 millibars. On pense que la présence des empreintes, notamment, permet de mieux répartir la déformation résultant de la pression interne. On évite ainsi la formation localisée d'un becquet ou d'une pliure analogue qui serait susceptible d'amorcer une fuite.

Claims (5)

  1. Couvercle métallique pour récipient, notamment pour récipient destiné au transport de matières dangereuses, du type comportant une paroi centrale (12) en contrebas du sommet (14) d'une jupe périphérique (13) fragmentée à la partie inférieure, définissant une pluralité de pattes de sertissage (17), lesdites pattes étant prévues pour être assemblées à un rebord dudit récipient par refoulement radial vers l'intérieur, ladite paroi centrale (12) étant pourvue de bossages (20) emboutis orientés sensiblement vers le milieu de ladite paroi centrale, caractérisé en ce que les bossages sont en forme de segment, répartis au voisinage de la périphérie de la paroi centrale (12).
  2. Couvercle métallique selon la revendication 1, caractérisé en ce qu'une gorge périphérique (22) est pratiquée dans ladite paroi centrale et en ce que cette gorge s'étend entre ladite jupe et lesdits bossages.
  3. Couvercle métallique selon la revendication 1 ou 2, caractérisé en ce que lesdits bossages (20) sont emboutis en creux sur la face interne de ladite paroi centrale.
  4. Couvercle métallique selon la revendication 2 ou 3, caractérisé en ce que lesdits bossages (20) s'étendent sensiblement à partir du bord intérieur de ladite gorge périphérique (22).
  5. Couvercle métallique selon la revendication 4, caractérisé en ce que ladite gorge périphérique (22) a un profil en cuvette présentant une pente intérieure (23a) plus faible que sa pente extérieure (23b).
EP90402322A 1989-08-29 1990-08-21 Couvercle métallique pour récipient étanche Expired - Lifetime EP0415819B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8911341A FR2651211B1 (fr) 1989-08-29 1989-08-29 Couvercle metallique pour recipient etanche.
FR8911341 1989-08-29

Publications (2)

Publication Number Publication Date
EP0415819A1 EP0415819A1 (fr) 1991-03-06
EP0415819B1 true EP0415819B1 (fr) 1994-06-08

Family

ID=9384971

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90402322A Expired - Lifetime EP0415819B1 (fr) 1989-08-29 1990-08-21 Couvercle métallique pour récipient étanche

Country Status (11)

Country Link
EP (1) EP0415819B1 (fr)
AT (1) ATE106830T1 (fr)
DE (1) DE69009631T2 (fr)
DK (1) DK0415819T3 (fr)
ES (1) ES2057474T3 (fr)
FI (1) FI94115C (fr)
FR (1) FR2651211B1 (fr)
IE (1) IE64156B1 (fr)
NO (1) NO179037C (fr)
PT (1) PT95128B (fr)
ZA (1) ZA906548B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9109820D0 (en) * 1991-05-07 1991-06-26 Courtaulds Coatings Holdings Lid for a pail
CN105292713A (zh) * 2015-11-20 2016-02-03 苏州华源包装股份有限公司 一种花篮盖

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1507561A (en) * 1923-06-14 1924-09-09 Nitrogen Corp Closure for barrels and the like
GB479059A (en) * 1936-07-31 1938-01-31 Herbert Lyon Carpenter Improvements in containers for transporting and storing materials
US3805991A (en) * 1967-09-11 1974-04-23 G Cheladze Lid construction with non-leak vent
CH586630A5 (fr) * 1974-11-18 1977-04-15 Metallurgie & Plastic Sa

Also Published As

Publication number Publication date
DK0415819T3 (da) 1994-10-03
ATE106830T1 (de) 1994-06-15
FI94115C (fi) 1995-07-25
DE69009631T2 (de) 1994-11-03
FI94115B (fi) 1995-04-13
ES2057474T3 (es) 1994-10-16
NO903773D0 (no) 1990-08-28
EP0415819A1 (fr) 1991-03-06
IE903121A1 (en) 1991-03-27
FR2651211A1 (fr) 1991-03-01
FI904233A0 (fi) 1990-08-27
NO179037B (no) 1996-04-15
PT95128B (pt) 1998-06-30
PT95128A (pt) 1991-04-18
FR2651211B1 (fr) 1991-11-22
IE64156B1 (en) 1995-07-12
NO179037C (no) 1996-07-24
DE69009631D1 (de) 1994-07-14
ZA906548B (en) 1992-01-29
NO903773L (no) 1991-03-01

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