EP0057911B2 - Doppelfalzverschluss zwischen Blechrumpf und Blechboden oder Deckel von Dosen - Google Patents

Doppelfalzverschluss zwischen Blechrumpf und Blechboden oder Deckel von Dosen Download PDF

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Publication number
EP0057911B2
EP0057911B2 EP82100785A EP82100785A EP0057911B2 EP 0057911 B2 EP0057911 B2 EP 0057911B2 EP 82100785 A EP82100785 A EP 82100785A EP 82100785 A EP82100785 A EP 82100785A EP 0057911 B2 EP0057911 B2 EP 0057911B2
Authority
EP
European Patent Office
Prior art keywords
double
closure
lid
fold
seam
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
EP82100785A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0057911B1 (de
EP0057911A1 (de
Inventor
Helmuth Dipl.-Ing. Supik
Günter Dipl.-Ing. Hexel
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
Schmalback Lubeca AG
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=6124498&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0057911(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Schmalback Lubeca AG filed Critical Schmalback Lubeca AG
Priority to AT82100785T priority Critical patent/ATE22858T1/de
Publication of EP0057911A1 publication Critical patent/EP0057911A1/de
Publication of EP0057911B1 publication Critical patent/EP0057911B1/de
Application granted granted Critical
Publication of EP0057911B2 publication Critical patent/EP0057911B2/de
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
    • B65D7/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal
    • B65D7/12—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls
    • B65D7/34—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls with permanent connections between walls
    • B65D7/36—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls with permanent connections between walls formed by rolling, or by rolling and pressing

Definitions

  • the invention relates to a gas-tight double-fold closure between the fuselage and the bottom or the lid of tin cans, in particular deep-drawn or iron-drawn cans made of tinplate or aluminum sheet, with the features of the preamble of claim 1.
  • Such a double fold closure is known from DE-OS 29 00 568.
  • the document is concerned with a tin made of sheet metal, which is particularly intended for beer or the like. Beverage, and it deals in detail with the Folzgeometrie the double fold closure for such a can.
  • the geometry of the individual sections of the double-foil closure must conform to a fixed standard in order to ensure a hermetically sealing double-fold closure even with increased internal pressure in the can.
  • the folding edges on the body and lid or bottom are subject to a considerable reduction in diameter during the forming processes. Not all sheet materials and sheet thicknesses can be reliably processed without the risk of wrinkles.
  • a turret geometry deviating from the norm is provided in the known can, which is determined by the fact that the lid hook length is significantly shortened compared to the standardized lengths, so that there is a quotient of the nominal diameter of the cover and length dimension of the cover hook equal to or greater than 30, while the corresponding quotient for the overlap length of the cover and body hook is between approximately 52 and 90.
  • These known measures are particularly suitable for cans with a nominal diameter in the range between 50 and 65 mm.
  • sheet thicknesses or sheet types can also be used for the production of the can, which up to then could not be used at all or could only be used with a considerably larger sheet thickness.
  • the tin can as a packaging container and the double-fold closure assigned to this tin can have been given high attention for many decades, since it is a packaging part that is distributed in tens of millions of pieces annually.
  • the double fold closure also pays particular attention to the fact that it can also be used for sensitive foods and beverages, which are subject to deterioration and deterioration within a very short time if the airtight or hermetic seal of the pack is not provided (see Howard, AJ "Canning Technology", London; J. and A. Churchill LTD. 1949 pages 73 to 89, especially pages 74/75 and 84).
  • This also applies to the cans according to the above-mentioned DE-OS 29 00 568, which are intended for beer or other drinks under pressure.
  • a gas leak due to the slightest leakage in the double seam leads to a significant decrease in value or to failure of the packaged goods.
  • the additional reshaping operation therefore serves less to improve the general tightness, but rather to increase the strength of the double-fold closure against a temporary increased mechanical stress during sterilization.
  • the starting point for the invention is the double rebate closure according to DE-A-29 00 568, which differs from the closures conventionally manufactured up to that point by a shortened lid hook length relative to the nominal diameter.
  • This dimensioning which deviates from the usual, serves the purpose of being able to use sheet metal types and sheet thicknesses that were previously unsuitable for the manufacture of such double rebate closures.
  • the invention aims in a different direction of cheaper, which is achieved in that the use of an additional sealant is omitted. This results in considerable savings in material costs. However, this also eliminates the expense of having the sealant ready and inserting it into the edge of the lid and thus into the double-fold closure. Even if these savings for the individual can appear to be small, enormous savings are indeed achieved with the extraordinarily large quantities produced each year.
  • the publication itself could not offer any suggestion for this, since it only deals with the reduction in the formation of wrinkles under certain circumstances and even the avoidance of wrinkles, to the knowledge of the experts, cannot solve the problem of hermetic tightness.
  • the advantages of the teaching according to the invention are the result of a new step that is completely surprising compared to the unanimous experience of the experts, namely the fact that in connection with a predetermined dimensioning of the folding elements, an additional sealant for double-fold closures has to be dispensed with, without the high demands on the gas-tight properties would have to be reduced compared to conventional double-fold closures with sealant.
  • the quotient of the nominal diameter of the cover and the length dimension of the lid hook is preferably between approximately 32 and 48.
  • the double salt connection can advantageously be designed such that the quotient of the nominal diameter of the lid and overlap length of the lid and body hooks lies between approximately 52 and 90, which is the usual overlap length (between about 24 and 52) significantly exceeds, as far as the preferred overlap length is between about 54 and 75.
  • the fold height can be between approximately 2 and 3 mm, preferably between 2.2 and 2.6 mm.
  • the fold height is measured parallel to the axis of the box between the tangents to the top fold edge and the bottom fold edge of the double fold connection.
  • the length of the overlap is measured between the free cut edges of the edge flange of the can body and the folded edge of the lid or bottom located inside the double fold connection.
  • the length of the lid hook and the length of the fuselage hook are measured between the free cut edge lying inside the double fold connection and the associated fold edge of the relevant can part.
  • the table below shows several comparative tests between cans made in different ways and made of different materials, with the thickness and quality of the cover, the type of manufacture of the fuselage, the standard size or reduced size of the cover hook and overlap length, the quotient mentioned in the claim, and the Results are reproduced.
  • the table shows that double rabbet connections with standard dimensions for the lid hook without sealant do not lead to the required tightness at the required internal pressures. This applies regardless of whether the hulls are welded or seamless, i.e. deep-drawn or ironed, or whether the lid / base is made of tinplate or aluminum. Can bodies with overlapped soldered or overlapped welded longitudinal seams do not appear to be suitable, since the material can lie sevenfold in the area of the cross seam and the material jump at this point therefore probably requires a sealant. On the other hand, it was found that can bodies with a crimp weld seam in which the sheet in the area of the cross seam is less than 7 times but> 5 times could be sealed sufficiently tight according to the teaching of the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Closures For Containers (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Stackable Containers (AREA)
  • Helmets And Other Head Coverings (AREA)
EP82100785A 1981-02-10 1982-02-04 Doppelfalzverschluss zwischen Blechrumpf und Blechboden oder Deckel von Dosen Expired - Lifetime EP0057911B2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82100785T ATE22858T1 (de) 1981-02-10 1982-02-04 Doppelfalzverschluss zwischen blechrumpf und blechboden oder deckel von dosen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813104715 DE3104715A1 (de) 1981-02-10 1981-02-10 Doppelfalzverschluss zwischen blechrumpf und blechboden oder deckel von dosen
DE3104715 1981-02-10

Publications (3)

Publication Number Publication Date
EP0057911A1 EP0057911A1 (de) 1982-08-18
EP0057911B1 EP0057911B1 (de) 1986-10-15
EP0057911B2 true EP0057911B2 (de) 1992-06-24

Family

ID=6124498

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82100785A Expired - Lifetime EP0057911B2 (de) 1981-02-10 1982-02-04 Doppelfalzverschluss zwischen Blechrumpf und Blechboden oder Deckel von Dosen

Country Status (4)

Country Link
EP (1) EP0057911B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
AT (1) ATE22858T1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
DE (1) DE3104715A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
ES (1) ES276019Y (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2043530B1 (es) * 1992-01-30 1994-06-16 Kramer Antonio Henriqu Procedimiento de fabricacion de recipientes metalicos.
DE4446393C1 (de) 1994-12-23 1995-12-21 Schmalbach Lubeca Compound-Dip-Verfahren für Metalldosen

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE130068C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) *
AT11925B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1902-02-24 1903-05-25 Benjamin Adriance
GB190315570A (en) * 1903-07-14 1903-08-20 Benjamin Adriance Improvements in Sheet Metal Boxes and the like.
FR1533260A (fr) * 1967-05-10 1968-07-19 Carnaud & Forges Perfectionnements aux sertis des boîtes métalliques, notamment pour conserves alimentaires
DE2900568C2 (de) * 1979-01-09 1985-12-19 Schmalbach-Lubeca AG, 3300 Braunschweig Dose aus Blech, insbesondere für erhöhten Innendruck, wie für Bier

Also Published As

Publication number Publication date
ES276019U (es) 1984-08-01
ES276019Y (es) 1985-03-01
DE3104715C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1993-08-26
EP0057911B1 (de) 1986-10-15
EP0057911A1 (de) 1982-08-18
DE3104715A1 (de) 1982-08-26
ATE22858T1 (de) 1986-11-15

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