EP0577503A1 - Verfahren zum Herstellen einer Dose bestehend aus einem Metallischen Körper und Deckel und nach diesen Verfahren hergestellte Dose - Google Patents

Verfahren zum Herstellen einer Dose bestehend aus einem Metallischen Körper und Deckel und nach diesen Verfahren hergestellte Dose Download PDF

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Publication number
EP0577503A1
EP0577503A1 EP93401679A EP93401679A EP0577503A1 EP 0577503 A1 EP0577503 A1 EP 0577503A1 EP 93401679 A EP93401679 A EP 93401679A EP 93401679 A EP93401679 A EP 93401679A EP 0577503 A1 EP0577503 A1 EP 0577503A1
Authority
EP
European Patent Office
Prior art keywords
cover
shoulder
box
box according
skirt
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.)
Granted
Application number
EP93401679A
Other languages
English (en)
French (fr)
Other versions
EP0577503B1 (de
Inventor
Jean-Francois Seconde
Gérard Heurteboust
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sollac SA
Original Assignee
Sollac SA
Lorraine de Laminage Continu SA SOLLAC
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9431352&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0577503(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sollac SA, Lorraine de Laminage Continu SA SOLLAC filed Critical Sollac SA
Publication of EP0577503A1 publication Critical patent/EP0577503A1/de
Application granted granted Critical
Publication of EP0577503B1 publication Critical patent/EP0577503B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner

Definitions

  • the present invention relates to a method of manufacturing a box consisting of a metal body and cover.
  • the box body has a bottom and an opposite open end delimited by a flange cooperating with a peripheral part of the cover to close the box.
  • the cover may be of the type commonly known as “styling”, that is to say bearing on the outer face of the rim, or of the type commonly known as “plug”, that is to say comprising a side wall received in the opening.
  • such boxes further include, when closed, a metal tape soldered with tin on the body and the cover to make the latter secured to the body.
  • the tape which constitutes a safety device making it possible to ensure that the box has never been opened must be separated from the body and the cover when the box is first opened.
  • a first part defines the opening of the box body and its end cooperates with a groove in the cover provided with a seal for closing the box.
  • the cover has a generally cylindrical peripheral wall of the same diameter as the second part, so that a cylindrical strip can then be welded to the second part and the wall. cover device to constitute a safety and opening device.
  • a box produced according to the method described above is relatively expensive and unattractive, because it has a weld necessary for producing the tube and requires a high number of operations.
  • the metallic cylindrical strip is welded by means of a tin alloy containing a little lead. Legislation tends to prohibit the use of lead in the food sector.
  • the purpose of the present invention is to provide a method of manufacturing a metal can, the body of which does not have a tin solder, neither for the attachment of the cover nor to the body, the can being easily opened without using any particular utensil, the cover of the box being able to be repositioned after opening and the production of the box being simple and of a reduced cost.
  • the invention also relates to a box comprising a body, a bottom and a cover, characterized in that the body comprises a peripheral skirt and a re-entrant flange provided with an annular groove, and in that the cover is provided with a peripheral rim intended to cooperate with the re-entrant rim of the body, the box further comprising an annular bead of securing plane covering both the peripheral rim of the cover and the outer face of the re-entrant rim of the body of the box.
  • a cylindrical metal box and a complementary cover made of the same metal a metal blank having a disc shape (not shown) is used.
  • the blank is stamped to obtain a hollow bell-shaped element 2 of substantially constant thickness, as shown in Fig.1.
  • the bell 2 comprises a cylindrical skirt 4 of axis X-X having an open end comprising a crimping rim 6 radially outside.
  • the end of the skirt opposite the rim 6 is closed by a radially inner annular shoulder 8, from which extends a tubular side wall 10 closed by a circular end wall 12 of axis XX and offset towards the outside of the skirt relative to the shoulder 8.
  • the bell is then separated into two elements 16 and 20 (see FIG. 2) by cutting the shoulder 8 along a line 14 of circular cutting of axis XX located between the skirt 4 and the tubular wall 10, the line 14 being shown in broken lines in Fig. 3.
  • a first element 16 obtained after separation of the bell into two elements comprises the end wall 12, the tubular wall 10, and a first part 18 of shoulder, forming an outgoing rim.
  • the second element 20 includes a second shoulder portion 19 forming a re-entrant rim, the skirt 4, and the rim 6.
  • These elements 16 and 20 are deformed so as to transform the first element 16 into a cover and the second element 20, into a can body.
  • the tubular wall 10 and the outgoing flange 18 are deformed with radial expansion of the assembly, that is to say that the diameter of the periphery of the cover 22 obtained (see FIG. 4), is larger than the outside diameter of the first element 16.
  • the radial expansion is limited depending on the metal used.
  • cover diameter - diameter of the first element diameter of the first element is limited to a maximum of 0.15 and preferably 0.10.
  • connection zone comprising a fold 24 between the end wall 12 and a ring 26 of axis XX parallel to the general plane of the wall end 12.
  • Steps 28 are made by stamping the end wall 12 to increase its resistance when necessary.
  • the dimensions of the groove 30 are adapted so that the ring 26 of the cover can be received against the bottom of the groove.
  • the cover 22 is placed on the second element 20, the ring 26 resting on the bottom of the groove 30.
  • a plane annular ring or bead 36 for example made of plastic, is then glued or heat-sealed so as to overlap the ring 26 and the zone adjacent to the inside edge 19 to form a peelable safety cordon (see Fig. 6).
  • cord connecting two parts of walls located substantially in the same radial plane is easier to produce than in the prior art in which it connects two parts of side walls.
  • the second element 20-cover 22 assembly forms a box body 34.
  • the box body 34 is then filled and a bottom 32 is fixed by crimping on the crimping rim 6 of the skirt 4 of the second element (see Fig. 6).
  • the bottom 32 is initially fixed by crimping on the crimping rim 6 of the skirt 4 of the second element, then the second element 20-bottom 32 assembly is filled, the cover then being, for example, heat-sealed on the rim of the second element.
  • the method according to the invention described above is adaptable for producing a styling cover or a cover of the plug type which is distinguished only by the fact that the fold 24 is different.
  • the groove 30 is produced during the stamping of the blank (see FIG. 7) and the separation of the bell 2 is carried out by cutting the tubular wall 10 along a cutting line 14 'situated in a radial plane near the outer face of the shoulder 8.
  • the shoulder 8 forms a re-entrant flange 19 delimiting the groove 30 and entirely integral with the second element 20 (see FIG. 10), which avoids subsequent deformation of the shoulder 8.
  • the first element 16 (see FIG. 8) comprises the end wall 12 and the tubular wall 10.
  • the tubular wall is then deformed with radial expansion, as described above, to form the periphery of the cover.
  • steps 28 were also produced on the end wall 12 during the stamping of the blank, but that these can be produced after separation of the bell into two elements.
  • the cover obtained is a cover of the plug type because the fold 24 (see Fig. 9) produced during the deformation of the tubular wall, has an outer wall 40 slightly inclined by relative to the axis XX and of dimension adapted to penetrate into the opening of the box body.
  • the box produced according to the variant described above is provided with a flat annular bead 36, for example made of aluminum, plastic or a material combining aluminum and plastic, heat-sealed or bonded (see FIG. 11).
  • the method described above, and its variant provide a cylindrical box and a cylindrical cover
  • the method, or its variant is adaptable to any form of box, or cover.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Table Devices Or Equipment (AREA)
  • Closures For Containers (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Making Paper Articles (AREA)
  • Connection Or Junction Boxes (AREA)
EP93401679A 1992-06-30 1993-06-29 Verfahren zum Herstellen einer Dose bestehend aus einem Metallischen Körper und Deckel und nach diesen Verfahren hergestellte Dose Expired - Lifetime EP0577503B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9208036A FR2692827B1 (fr) 1992-06-30 1992-06-30 Procede de fabrication d'une boite constituee d'un corps et d'un couvercle metallique.
FR9208036 1992-06-30

Publications (2)

Publication Number Publication Date
EP0577503A1 true EP0577503A1 (de) 1994-01-05
EP0577503B1 EP0577503B1 (de) 1996-05-15

Family

ID=9431352

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93401679A Expired - Lifetime EP0577503B1 (de) 1992-06-30 1993-06-29 Verfahren zum Herstellen einer Dose bestehend aus einem Metallischen Körper und Deckel und nach diesen Verfahren hergestellte Dose

Country Status (5)

Country Link
EP (1) EP0577503B1 (de)
AT (1) ATE137999T1 (de)
DE (1) DE69302629T2 (de)
ES (1) ES2087680T3 (de)
FR (1) FR2692827B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2722713A1 (fr) * 1994-07-25 1996-01-26 Metal Box Plc Procede de fabrication d'une boite metallique

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE752943C (de) * 1938-11-06 1953-03-09 Ver Deutsche Metallwerke Ag Verfahren zur Herstellung von duennwandigen zylindrischen Hohlkoerpern, insbesondere Konservendosen
US3415413A (en) * 1963-05-21 1968-12-10 Union Carbide Corp Containers and method of making same
US3428010A (en) * 1967-02-03 1969-02-18 Continental Can Co Method of making a metallic can and cover
EP0442770A1 (de) * 1990-01-26 1991-08-21 Carnaudmetalbox Verpackung aus Metall mit heissgesiegeltem Deckel und Verfahren zum Herstellen einer solchen Verpackung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE752943C (de) * 1938-11-06 1953-03-09 Ver Deutsche Metallwerke Ag Verfahren zur Herstellung von duennwandigen zylindrischen Hohlkoerpern, insbesondere Konservendosen
US3415413A (en) * 1963-05-21 1968-12-10 Union Carbide Corp Containers and method of making same
US3428010A (en) * 1967-02-03 1969-02-18 Continental Can Co Method of making a metallic can and cover
EP0442770A1 (de) * 1990-01-26 1991-08-21 Carnaudmetalbox Verpackung aus Metall mit heissgesiegeltem Deckel und Verfahren zum Herstellen einer solchen Verpackung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2722713A1 (fr) * 1994-07-25 1996-01-26 Metal Box Plc Procede de fabrication d'une boite metallique

Also Published As

Publication number Publication date
ATE137999T1 (de) 1996-06-15
EP0577503B1 (de) 1996-05-15
FR2692827B1 (fr) 1996-06-21
FR2692827A1 (fr) 1993-12-31
DE69302629D1 (de) 1996-06-20
DE69302629T2 (de) 1996-11-28
ES2087680T3 (es) 1996-07-16

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