EP1843946B1 - Boite metallique a fond plat empilable - Google Patents

Boite metallique a fond plat empilable Download PDF

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Publication number
EP1843946B1
EP1843946B1 EP06705897A EP06705897A EP1843946B1 EP 1843946 B1 EP1843946 B1 EP 1843946B1 EP 06705897 A EP06705897 A EP 06705897A EP 06705897 A EP06705897 A EP 06705897A EP 1843946 B1 EP1843946 B1 EP 1843946B1
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EP
European Patent Office
Prior art keywords
metal
substantially flat
body portion
bead
lid
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.)
Active
Application number
EP06705897A
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German (de)
English (en)
Other versions
EP1843946A1 (fr
Inventor
Willem Leendert Pieter Van Dam
Bertold Bast
Norbert Mertens
Jan Driessens
Maril Kamp
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.)
Ardagh Metal Packaging Germany GmbH
Original Assignee
Ball Packaging Europe GmbH
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 Ball Packaging Europe GmbH filed Critical Ball Packaging Europe GmbH
Priority to PL06705897T priority Critical patent/PL1843946T3/pl
Publication of EP1843946A1 publication Critical patent/EP1843946A1/fr
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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
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/12—Cans, casks, barrels, or drums
    • B65D1/14—Cans, casks, barrels, or drums characterised by shape
    • B65D1/16—Cans, casks, barrels, or drums characterised by shape of curved cross-section, e.g. cylindrical
    • B65D1/165—Cylindrical cans
    • 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
    • B65D21/00—Nestable, stackable or joinable containers; Containers of variable capacity
    • B65D21/02—Containers specially shaped, or provided with fittings or attachments, to facilitate nesting, stacking, or joining together
    • B65D21/0209—Containers specially shaped, or provided with fittings or attachments, to facilitate nesting, stacking, or joining together stackable or joined together one-upon-the-other in the upright or upside-down position
    • B65D21/0217—Containers with a closure presenting stacking elements
    • B65D21/0222—Containers with a closure presenting stacking elements the closure and the bottom presenting co-operating peripheral ribs and grooves

Definitions

  • the invention relates to a metal can made of steel or aluminum, preferably of smaller format, as is customary for baby or infant formula or condensed milk.
  • the metal box is a one-piece box from the sheet types mentioned, with the second Tell a lid added, which is attached with a fold on the upper edge of the box (more precisely, the fuselage or lower part or seamless can body).
  • Metallic containers or cans were generally made of three parts (so-called three-cell cans) for the stated purposes: a hull rolled out of sheet metal with a longitudinal seam connecting the axially extending end edges and a bottom and a lid connected respectively to the open ends of the hull a double seam were connected. Although the production is simple and inexpensive, but material-consuming.
  • a metal can in particular a beverage can according to the preamble of claim 1, known, which is stackable.
  • a beverage can In such a beverage can is a bulge, which also forms the footprint of the beverage can, provided on the bottom of the respective beverage can.
  • This convexity with an outer cone is capable of sliding into the skirt of the lid of a lower can located under an upper can and thus making a stack connection between the upper and lower cans.
  • the possibility is to be created, and therein the invention sees its technical task, on the same production line alternately (also according to demand) in the fuselage one-piece beverage cans, alternatively metal cans for baby or baby food in particular, milk formula or condensed milk, while at the same time In the last mentioned food sector, the possibility of significant material savings should be opened up.
  • condensed milk is a foodstuff as non-carbonated contents for the open can according to claim 1 or the closed can according to claim 20.
  • the bottom of the can is - in contrast to on the priority day common two-piece beverage cans - designed to be substantially flat. He has no concave or convex curvatures (claim 4).
  • the filling volume of the small-volume can bodies essentially corresponds to the schematic volume of space of the can (as a cylinder body), which is thus completely available for the filling.
  • an inert gas can be filled in during the filling of the can and thus a slight internal overpressure can be generated.
  • a preferred "slight overpressure” is in the range of 0.1 MPa (1 bar), in addition to the external pressure, preferably between 0.8 bar and 1.2 bar over the external pressure, generally assumed to be 1 bar (0.1 MPa) is (claim 22), all at normal outdoor temperature. This should be understood as “easy”. This can be seen in relation to the high pressures that can be obtained with carbonated beverage cans between 0.4MPa (4 bar) and 0.8MPa (8bar) in addition to pressure, which a domed vaulted soil can withstand.
  • the claimed metal cans are small volume (claim 18), but may have different dimensions in terms of axial height, diameter and opening width at the trunk end.
  • Their volume is in the meaning of a "smaller format" in the range between 150ml and 500ml, ie below half a liter, preferably below 330ml.
  • Their height is usually no larger than 120mm, their diameter between 50mm and 75mm.
  • the floor is stiffened to the extent that an everting to prevent the stability and to block a stackability is avoided.
  • the bottom is still flat, which does not allow it to extend further upward than measured from the support plane, as substantially 5 mm (claim 8). It extends in a height range between the contact plane and the highest point of the bottom surface, usually in the central portion of the bottom, which does not extend further than an intended stacking bead, which is arranged radially within the circumferential Aufstandsrippe (claim 6).
  • a terraced formation (claim 9) can be chosen as well as a central planar area which is surrounded by annular corrugations (claim 10).
  • the method for stacking the seamless can body can also be understood as relating to the manufacture of these can bodies.
  • a substantially flat bottom is integrally formed.
  • the substantially flat bottom connects to a further outermost bead, which can be named as stacking bead.
  • an underlying seam of a second can which is identical or structurally similar (possibly with different imprint and decoration), engages. stacking one.
  • the same task is fulfilled by the circumferential indentation in the conical confinement, which can be understood as a laterally open groove and can create a folded seam within the inner edge.
  • a substantially flat cover mirror of a folded lid is lowered relative to the connecting seam and immediately adjoins this seam via a chuck wall projecting axially towards the interior of the fuselage or the closed container (claim 11).
  • the reduction is small. Your measure is smaller than the axial height of the fold (claim 12).
  • the lid is designed as a tear-open lid with a peripheral line of weakness and a pull-tab, preferably as a full-open lid with round line of weakness near the damping bead (claim 13).
  • the bottom bead axially inwardly (to the interior of the sealed container) disposed radially inwardly of the lower end of the cone-shaped retraction of the fuselage has a seam stacking contact associated with a can underneath.
  • the lower end of the recovery forms the rib (claim 2).
  • the circumferentially extending indentation is directly attached radially to the outside of the recess. It is the radially outwardly facing wall or surface of the fin (claim 3), which is formed radially inward and thus "outwardly facing”.
  • the basic form of metal cans, 1,1 a or 16 made of sheet metal after FIGS. 1 to 3 has a seamless hull 2 with integrally formed bottom 3.
  • the hull 2 is tapered at its two end regions (at the upper edge a so-called. Necking, at the bottom of a confiscation to a circumferential ribs).
  • the cone shape is shown at 5 or 11 at the respective axial end region.
  • the open end 17 of the fuselage 2 can be closed with a metallic cover 4 via a double seam in a conventional manner.
  • the upper closed axial end 2b forms.
  • the production of hull and ground is done in the usual way by drawing (drawn wall ironed, DWI) and brings a significant material savings, as is known from two-piece beverage cans ago.
  • the cover 4 has a "mirror" as a cover panel 4a and a circumferential damping bead 13, which leads into the connecting seam 12 (as, for example, fold).
  • the panel 4a is substantially flat and is lowered from the upper end of the seam 12 and immediately adjoins this seam 12 via the axially downwardly extending bead 13.
  • the can bottom 3 is - in contrast to the priority day common two-piece beverage cans - formed substantially flat. It has no concave or convex curvature.
  • the filling volume essentially corresponds to the schematic volume of space of the can, which is so fully available for the filling.
  • This ring plane defined by Y is based on the upper can 1 and the similar lower can 1a. However, it is equally representative of the bead 7 and seam (seam) 12 'on the same can 1. 12 'symbolizes the folding seam, not shown, on the upper box 1. As such, it can also be measured alone as stackable if it is placed in a stack composite with "its like", as is the beginning of the stacking state FIG. 1 shows. This applies in the same way also to the later presented examples of Figures 4,5 ,
  • the bottom area within the bead 7 is terraced and consists of the flat central surface 8 and two likewise flat annular surfaces 9 and 10, which are connected via small steps or shoulders 9a, 10a with each other.
  • the step heights are smaller than the horizontal extensions of the ring surfaces.
  • the substantially flat bottom extends in height direction only limited, which explains its small distance from the fin 6.
  • the riot level E is defined by the lowest point of the fin 8, which runs around the stacking bead 7.
  • the small radius of curvature 6a defines the arc defining the axially lower end of the fin 6 thereof. Spaced axially (and radially as well) is the central area 8.
  • This height range or difference height is not higher than 10 mm, preferably less than 5 mm, measured from the level E (the lower axial end of the fin) and the highest point of the bottom 3, which is In FIG. 1 the central area 8 corresponds.
  • the thickness of the sheet used In this soil is between 0.2 mm and 0.25 mm for steel cans.
  • the bottom is designed, despite the absence of dome-shaped stiffeners, to withstand an internal pressure ranging up to 3.5 bar (0.35 MPa), which is the differential pressure between the internal pressure of a sealed and filled can and the external pressure below the bottom.
  • This compressive strength refers to a resistance to evasion or buckling, slight variations in the heights of the sections of the terraced floor are quite permitted, the standing and stacking ability must not be affected, however, the maximum movements of the substantially flat soil at its low Height dimension circumscribes. This naturally implies that the bottom also remains stabilized up to essentially 2 bar (0.20 MPa), ie neither evades nor bulges even at lower pressures, based on the same pressure difference, which was called the 3.5 bar number.
  • the metal cans are small-volume, may have different dimensions with respect to the axial height 15a, diameter 16b and opening width 15c at the fuselage neck 17 (axial upper end). Their volume is preferably in the range between 150ml and 500ml. Their height is usually not greater than 120 mm, their diameter between 50mm and 76 mm. Also, the axial extent 6c of the conical recess 5 of the fuselage 2 at the transition to the ground area can vary as well as the Kegeine Trent 6b.
  • the Kegeine Trent refers to the axially lower end of the can. It lies in an indicated angle 6b, which can be selected between 10 ° and 30 °, depending on the diameter 15b of the can body.
  • the Kegenelgung at the opposite end symbolizes with 11 in FIG. 1 (in the case of the axially lower can), lies above the angle message at the lower end and is 30 ° with a margin of ⁇ 20%.
  • the can may be provided with the food after filling or with an inert gas when filling, which produces a slight internal overpressure.
  • a preferred "slight overpressure" is in the order of 1 bar (0.1 MPa), in addition to the external pressure, preferably between 0.8 bar and 1.2 bar over the external pressure, which is generally assumed to be 1 bar.
  • the associated wall thickness of the fuselage 2 is in the range between 0.07 mm and 0.09 mm sheet thickness, especially in steel.
  • FIG. 4 shows a modified configuration 3a of a bottom portion within the immediately adjacent to the conical surface edge bead 6 of a can 20.
  • the central portion 22 is smooth and flat.
  • the section 21 between this and the edge bead 6 is weakly wavy or zig-zag-shaped in cross section, which in turn connects to the edge bead an outwardly open bead 7,
  • the folded seam on the lid 24 of the underlying can is included.
  • On the cover serving for opening grip tab 25 is attached. It can be seen that this bottom 22 is formed substantially flat, without convex or concave bulges.
  • the wavy portion 21 has a plurality of circumferentially extending recesses 23, but which are not a convex / concave bulge in the sense of a dome (Dom) or an eccentric bulge.
  • the amplitudes of the recesses are smaller than the depth of the bead 7.
  • the box 20 has at the upper open end a conical recess 41 with a substantially flat inclined surface.
  • a lid can be folded, as a lid 24 in FIG. 4 shown.
  • the container 30 according to Figure 6 has an inner bottom surface 35, that of the bottom 3a after FIG. 4 equivalent. Immediately radially Within the ridge bead 36 of the can, as described above, there is an outwardly open bead 38 for possible reception of the seam of another can.
  • a dent 32 (as a peripheral open bead) is provided, which is arranged and dimensioned so that they provide the provided at the upper end 30b seam 34 between the cover 33rd and can securely hold a lower can 30a with a larger lid diameter.
  • the circumferential indentation 32 on the radially outer surface of the ridge bead 36 may be present alone or in addition to the peripheral bead 38, the latter the bead 7 corresponds to the previous examples.
  • the ratio of the recesses 41, 31 determines which lid size of a lid 33 is used to achieve stacking. Either by engagement of the seam 34 in the radially outward indentation or by engagement in the radially inwardly located bead 38 (corresponding to 7 of the other examples). Both, the bead 7 and 38 on the one hand and the indentation 32 on the other hand are "pointing outwards". They can be individual or cumulative.
  • a respective lid has as a tear-open while a circumferential line of weakness, with the tear tab 25 after FIGS. 4 or 5 can be broken to take out the lid sponge within the circumferential line of weakness. This is common and common prior art, which will not be explained separately here.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Stackable Containers (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Table Devices Or Equipment (AREA)
  • Hydrogen, Water And Hydrids (AREA)

Claims (21)

  1. Boîte métallique constituée d'un corps sans soudure (1) en tôle, comportant un flanc (2) et un fond (3 ; 3a, 35), essentiellement plat, formant une seule pièce avec celui-ci,
    le flanc (2) étant renfoncé à l'intérieur en formant un cône (5, 11 ; 31, 41) aussi bien vers le fond (3) que vers une extrémité ouverte (15c) ;
    le fond (3) essentiellement plat présentant une moulure (7) dirigée vers l'extérieur ou bien un creux (32),
    caractérisé en ce que
    celle-ci est configurée et adaptée pour recevoir par empilement une soudure de liaison (12 ; 34) qui relie une extrémité (15c) d'un deuxième flanc d'une deuxième boîte métallique (1a ; 15) identique à un couvercle (4) qui ferme celle-ci.
  2. Boîte métallique selon la revendication 1, sur laquelle la moulure (7), axialement en saillie vers l'intérieur, est disposée radialement à l'intérieur de l'extrémité inférieure du renfoncement conique (5) du flanc (2) - de préférence en formant une nervure verticale (6) axialement en saillie vers l'extérieur - et part du renfoncement conique (5) ou lui est du moins proche.
  3. Boîte métallique selon la revendication 1, sur laquelle le creux (32) est prévu au niveau du renfoncement (31) en forme de cône (conique) du flanc (30) radialement à l'extérieur d'une nervure verticale (36), axialement en saillie vers l'extérieur, jouxtant directement le renfoncement.
  4. Boîte métallique selon l'une quelconque des revendications précédentes, dont le fond (3), essentiellement plat, est exempt de tronçons convexes ou concaves.
  5. Boîte métallique selon l'une quelconque des revendications 1 à 4, sur laquelle le fond (3), essentiellement plat, est constitué de plusieurs tronçons (8, 9, 10) étendus essentiellement plats, décalés radialement l'un par rapport à l'autre.
  6. Boîte métallique selon l'une quelconque des revendications précédentes, sur laquelle le fond plat (3 ; 3a ; 35) s'étend jusqu'à une hauteur définie par une extrémité axialement supérieure de la moulure (7) et une extrémité axialement inférieure d'une nervure verticale (6), en particulier à une hauteur inférieure à 5 mm.
  7. Boîte métallique selon la revendication 5, sur laquelle les tronçons du fond sont reliés entre eux respectivement par des épaulements étroits (9a, 10a) ou autres paliers, en particulier les "épaulements étroits" sont plus courts qu'une étendue latérale d'un tronçon voisin, ce qui représente un léger étagement.
  8. Boîte métallique selon la revendication 5, sur laquelle le fond (3 ; 3a ; 35) n'est pas axialement en saillie vers l'intérieur de plus de 5 mm, mesuré sur une extrémité axiale inférieure d'une nervure verticale (6, 36).
  9. Boîte métallique selon la revendication 5, sur laquelle les tronçons plats (8, 9, 10) sont décalés l'un par rapport à l'autre dans le sens axial par des épaulements (9a, 10a), de préférence lorsqu'on regarde depuis le côté radialement extérieur vers le côté radialement intérieur dans un sens vers le côté axialement intérieur.
  10. Boîte métallique selon l'une quelconque des revendications 1 à 9, sur laquelle le fond essentiellement plat (21) présente, à l'extérieur d'un centre (22, 8) des ondulations (23) circulaires ou similaires, en particulier d'une faible amplitude.
  11. Boîte métallique selon l'une quelconque des revendications précédentes, sur laquelle un panneau de couvercle (4a, ouverture au sou) essentiellement plat est abaissé par rapport à la soudure de liaison (12) et directement adjacent à cette soudure par l'intermédiaire d'une moulure d'amortissement (13) axialement en saillie vers l'intérieur.
  12. Boîte métallique selon la revendication précédente, sur laquelle l'abaissement par rapport à la soudure de liaison est léger, en hauteur plus petit qu'une hauteur axiale d'un serti double (12).
  13. Boîte métallique selon la revendication 1 ou la revendication 6, sur laquelle le couvercle (4 ; 24) est un couvercle à ouverture facile comportant une ligne d'amincissement tout autour et une languette (25) et la première et la deuxième boîtes métalliques sont empilées l'une sur l'autre, la soudure de liaison (12 ; 34) étant logée de manière empilable et reliant le couvercle à ouverture facile à la deuxième boîte métallique.
  14. Boîte métallique selon la revendication 1, sur laquelle le renfoncement conique (5) forme un angle compris entre 10° et 30° par rapport au fond.
  15. Boîte métallique selon la revendication 1 ou la revendication 14, sur laquelle le renfoncement conique (11, 41) est situé dans une zone de 30° ± 20 % par rapport à l'extrémité ouverte (47).
  16. Boîte métallique selon la revendication 1 ou la revendication 6, sur laquelle le fond essentiellement plat résiste aux bombages durs ou aux bombages doux, la pression pouvant atteindre essentiellement 2 bars (0,20 MPA), sous forme de pression différentielle par rapport à un côté extérieur.
  17. Boîte métallique selon la revendication 16, sur laquelle la tôle du fond essentiellement plat a une épaisseur comprise entre 0,2 mm et 0,25 mm.
  18. Boîte métallique selon l'une quelconque des revendications précédentes, dont la contenance est comprise entre 150 ml et essentiellement 500 ml.
  19. Boîte métallique selon la revendication 16, sur laquelle la résistance à la pression va essentiellement jusqu'à 0,35 MPa.
  20. Procédé de fabrication d'une boîte métallique constitué d'un corps (1) en tôle sans soudure, d'un flanc (2) et d'un fond (3 ; 3a ; 35), essentiellement plat, formant une seule pièce avec celui-ci,
    - le flanc (2) étant renfoncé à l'intérieur en formant un cône (5, 11 ; 31, 41) aussi bien vers le fond que vers son extrémité ouverte (17) et le fond essentiellement plat présentant une moulure (7) dirigée vers l'extérieur ou bien un creux (32), la moulure (7) ou le creux (32) étant adapté(e) pour recevoir une soudure de liaison (12 ; 34) disposée plus vers le bas, soudure qui relie une extrémité axiale (17) d'un flanc d'une deuxième boîte métallique (1a, 30), identique, au couvercle de celle-ci (4, 33),
    - et les deux boîtes pouvant être empilées.
  21. Procédé d'empilement de plusieurs boîtes métalliques constituées d'un corps (1) sans soudure en tôle, d'un flanc (2) et d'un fond (3 ; 3a ; 35), essentiellement plat, formant une seule pièce avec celui-ci,
    - le flanc (2) renfoncé à l'intérieur en formant un cône (5, 11 ; 31, 41) aussi bien vers le fond que vers une extrémité ouverte (17) et le fond essentiellement plat présentant une moulure (7) dirigée vers l'extérieur ou bien un creux (32), ), la moulure (7) ou le creux (32) étant adapté(e) pour recevoir une soudure de liaison (12 ; 34) disposée plus vers le bas, soudure qui relie une extrémité axiale (17) d'un flanc d'une deuxième boîte métallique (1a, 30), identique, au couvercle de celle-ci (4, 33),
    - et les deux boîtes pouvant être empilées.
EP06705897A 2005-02-05 2006-02-03 Boite metallique a fond plat empilable Active EP1843946B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL06705897T PL1843946T3 (pl) 2005-02-05 2006-02-03 Puszka płaskodenna umożliwiająca składowanie w stosach

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005005419 2005-02-05
PCT/DE2006/000168 WO2006081810A1 (fr) 2005-02-05 2006-02-03 Boite metallique a fond plat empilable

Publications (2)

Publication Number Publication Date
EP1843946A1 EP1843946A1 (fr) 2007-10-17
EP1843946B1 true EP1843946B1 (fr) 2010-07-14

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Country Link
US (1) US20090090646A1 (fr)
EP (1) EP1843946B1 (fr)
AT (1) ATE473926T1 (fr)
DE (1) DE502006007417D1 (fr)
ES (1) ES2348096T3 (fr)
PL (1) PL1843946T3 (fr)
WO (1) WO2006081810A1 (fr)

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PL426328A1 (pl) * 2018-03-20 2019-09-23 Can-Pack Spółka Akcyjna Puszka metalowa

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Publication number Publication date
EP1843946A1 (fr) 2007-10-17
ES2348096T3 (es) 2010-11-30
US20090090646A1 (en) 2009-04-09
DE502006007417D1 (de) 2010-08-26
PL1843946T3 (pl) 2010-12-31
ATE473926T1 (de) 2010-07-15
WO2006081810A1 (fr) 2006-08-10

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