EP0445721A1 - Bôite en tôle en deux ou trois parties, avec fermeture à double pli, et procédé de sa fabrication - Google Patents

Bôite en tôle en deux ou trois parties, avec fermeture à double pli, et procédé de sa fabrication Download PDF

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Publication number
EP0445721A1
EP0445721A1 EP91103295A EP91103295A EP0445721A1 EP 0445721 A1 EP0445721 A1 EP 0445721A1 EP 91103295 A EP91103295 A EP 91103295A EP 91103295 A EP91103295 A EP 91103295A EP 0445721 A1 EP0445721 A1 EP 0445721A1
Authority
EP
European Patent Office
Prior art keywords
lid
bead
seam
edge
double
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.)
Withdrawn
Application number
EP91103295A
Other languages
German (de)
English (en)
Inventor
Günter Dipl.-Ing. Hexel
Georg Dr. Dipl.-Chem. Bolte
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.)
Bolte Georg Dr
Original Assignee
Bolte Georg Dr
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
Application filed by Bolte Georg Dr, Schmalback Lubeca AG filed Critical Bolte Georg Dr
Publication of EP0445721A1 publication Critical patent/EP0445721A1/fr
Withdrawn legal-status Critical Current

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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
    • B21D51/30—Folding the circumferential seam
    • 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 two-part or three-part tin made of sheet metal with the features of the preamble of claim 1.
  • the cans have been in use in many forms for decades and have been tried and tested in practice.
  • the cans can be constructed in three parts and consist of a cylindrical body part which is closed by a cover part and a base part made of sheet metal using a double seam.
  • the can also be formed in two parts, i.e. have an integrally molded bottom.
  • the open edge of the can body is formed into an outwardly projecting flange which serves to support the molded-on lid edge which serves to form the double seam.
  • Such cans are filled, whereupon the lid is brought into position on the edge of the fuselage and the double seam is formed by a closing head by upsetting and / or rolling.
  • the double seam is concentric to the axis of the can body and cylindrical to this axis.
  • This design of the can improves the appearance of the closed can compared to cans with a cylindrical seam. Since the double seam is formed by rolling and / or upsetting or the like. In such a way that it lies flat in a plane perpendicular to the axis of the can and points to this axis, a smaller one can be used in the manufacture of the cover Round diameter can be assumed. As a result, material and costs can be saved to a considerable extent in the large quantities in which such cans are used.
  • the radially inward-shaped double-seam seam which is formed flat on the cover plate, reduces the exposed or clamped surface of the lid mirror, which is also supported to a considerable extent by the double-seam seam lying on it. This reduces the total wing load. so that lids with reduced sheet thickness can also be used, which additionally leads to a reduction in the blank diameter and to a material saving. At the same time, the pressure stability of the sealed box in the area of the lid is significantly improved, since the double fold on top forms a reinforcing ring for the lid mirror.
  • the open beads in particular the ones that compress to a closed fold, make a significant contribution, since the edge of the cover mirror is clamped between the edges and the double fold.
  • the bead in the fuselage part remains at least partially open to the outside, so that the can body with the aid of support elements engaging in the bead from the outside during the filling process and / or during the laying on of the lid, reshaping the edge of the fuselage and forming the Double fold seam can be supported reliably, so that a very stable and firmly formed flat fold double seam is obtained.
  • the bead is compressed into a flat fold and preferably has a slight conical inclination to a plane running perpendicular to the fuselage axis.
  • the can is in two parts or in three parts, since it is the design of the can for the closure after the can has been filled with a lid.
  • box and lid are made of sheet metal.
  • Figures 1 shows the parts of the can in a state as they can be supplied by the manufacturer to the bottlers. It can be seen that, contrary to the usual can bodies intended for closing with double seam seams, the edge 29 of the can body 25 maintains its cylindrical shape. Instead of the usual edge flange, a bead is formed in the fuselage wall along a circumferential line at a predetermined axial distance from the opening edge.
  • the cover 34 is, as usual, formed from a cover blank. Its cover mirror can be flat or profiled if necessary. It can also be a so-called tear-open cover with a tear-open part predetermined by lines of weakness or the like. Instead of the edge flange which is otherwise customarily formed for the production of a double fold seam, the cover edge 36 is formed axially outwards and radially inwards into a cover edge hook. The maximum diameter of the lid formed in this way is dimensioned such that the lid can be inserted easily but with little play into the cylindrical edge 29 of the can body 25, as shown in FIG. 1.
  • the lid is inserted after the can body has been filled to the desired level.
  • the cylindrical rim 29 of the can body is shaped inwards by upsetting and / or rolling into the same angular position as the lid hook 36 and is turned radially inwards and axially downwards over the lid hook.
  • the indented end 41 is then widened outwards under the cover hook 36, as indicated by the arrow in FIG. 2, so that the originally cylindrical edge 29 of the fuselage engages around the cover hook 36.
  • the interlocking sections become one lying flat on the cover mirror and formed on the bead 26 of the fuselage supporting inner double seam.
  • a radially outwardly at least partially open formation of the bead has the advantage that the can body is centered in a simple manner during the filling, placing the lid, reshaping the edge of the fuselage and shaping the double fold, and in radial and in axial Direction can be supported reliably in order to form the double fold with high force into a firm and tight fold.
  • support segments 30 are arranged in the sealing machine and can be moved or displaced synchronously in the radial direction. With their radially inwardly projecting finger-like sections, they are adapted to the shape of the indentation and engage in them.
  • the shaped segments 30 are arranged in a sled-like manner on a corresponding guide bed in accordance with the double arrow 30a.
  • a design of the lid hook 36 in such a way that it forms an angle of approximately 45 ° to a plane perpendicular to the axis 19 of the can body has proven particularly useful.
  • the bead 26 formed continuously or intermittently in the circumferential direction in the can body 25 has an approximately semicircular cross section with a radius 27 around a point 28 which lies in the cylindrical surface of the body.
  • the cover mirror 34 assumes a position that lies between the center of curvature 28 and the upper edge of the bead 26.
  • the outer annular region 35 of the cover mirror is closely adapted to the outline shape of the bead 26 before the cover mirror merges into the cover hook 26 located above the bead.
  • a sealant 38 can be used. This is particularly advantageous in the area of the outer edge on the outside of the lid hook 36 applied in the usual way. This rules out the possibility that the contents can migrate to the edges of the lid and / or body.
  • the nose of the support segments 30 is closely adapted to the outline of the bead 26, as shown at 35.
  • the nose engages the bead at least over the upper half of the bead cross section. Close support of the transition between the bead 26 and the upper cylindrical region 29 of the fuselage has also proven to be particularly advantageous.
  • double fold 45 adapts to the shape of the section 35 of the cover and the shape of the bead 26. After being shaped in accordance with arrow 46, double fold 45 thus has a section 47 following the contour of the bead and a section 48 lying flat on the remaining part of cover mirror 34.
  • the segments 30 supportively engage in the outwardly open bead of the fuselage.
  • the exposed surface area of the lid mirror 34 is limited to the dimension 49.
  • the edge area of the cover mirror is supported by the double fold, which is particularly stable due to its shape.
  • the bead 26 itself also contributes significantly to this support and stability.
  • the bead 26 can also be slightly compressed axially during the shaping of the double fold seam, as is shown at 31b and 31d.
  • a special sealant 38 (FIG. 1) can be dispensed with in certain cases even if a hermetic seal is required.
  • the bead is only partially open to the outside, while the radially inner area forms a closed fold.
  • the open area is sufficient to center and support the trunk when filling and / or closing the can.
  • the lid and the double fold seam lie snugly on the open part of the bead and the closed fold section.
  • the inner folded edge 31e is equal to or slightly closer to the torso axis (see FIG. 1, number 19) than the inner edge of the double seam, the diameter of which is given off at 49.
  • Figure 5 shows a preferred embodiment.
  • the beading - preferably before the fuselage is filled - is formed into a closed fold 51 and pressed together.
  • the cover mirror 52 fits snugly on this fold and in turn also supports the double fold seam 50 securely during and after its formation via the radial expansion of the fold.
  • the closed fold can be created after appropriate pre-shaping simply by exerting an axial pressure on the fuselage and without any help from internal or external shaping tools.
  • the shape and manufacture are therefore particularly simple.
  • a very stable support for the lid is obtained when the can is closed, forming the double seam.
  • the fold also enables the cover to be easily and precisely supported before the double seam is formed.
  • the fold which is drawn in in radial alignment with the fuselage axis, has a slight, conical inclination axially outwards to the plane perpendicular to this axis, as is indicated by the cone angle 53 , or axially inwards, according to the cone angle 54, receives.
  • the angles shown are exaggerated. As a rule, a slight taper between 4 and 12 °, preferably around 8 °, is sufficient.
  • the taper only has to be sufficient to generate a sufficiently large pretension for the fold compared to the axial pressures which occur when the double fold seam is formed.
  • This taper can e.g. be determined by the geometry of the fuselage bead, which is then formed into a closed fold by axial loading of the fuselage. However, it can also be achieved by slightly tilting the closed fold in a separate processing step. The taper does not necessarily have to be recognizable after closing the can.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
EP91103295A 1990-03-08 1991-03-05 Bôite en tôle en deux ou trois parties, avec fermeture à double pli, et procédé de sa fabrication Withdrawn EP0445721A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4007381 1990-03-08
DE19904007381 DE4007381A1 (de) 1990-03-08 1990-03-08 Durch doppelfalznaht verschliessbare zwei- oder dreiteilige dose aus blech und verfahren zu ihrer herstellung

Publications (1)

Publication Number Publication Date
EP0445721A1 true EP0445721A1 (fr) 1991-09-11

Family

ID=6401735

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91103295A Withdrawn EP0445721A1 (fr) 1990-03-08 1991-03-05 Bôite en tôle en deux ou trois parties, avec fermeture à double pli, et procédé de sa fabrication

Country Status (2)

Country Link
EP (1) EP0445721A1 (fr)
DE (1) DE4007381A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995003972A1 (fr) * 1993-07-27 1995-02-09 Continental Cup Company Pty. Ltd. Appareil de pose de couvercle sur recipient
DE4440628A1 (de) * 1994-11-14 1996-05-30 Schmalbach Lubeca Gestufter Falz
US5947673A (en) * 1994-11-14 1999-09-07 Schmalbach-Lubeca Ag Stepped seam for a can
CN111952117A (zh) * 2019-05-14 2020-11-17 马赛尔·P·霍夫萨埃斯 温控开关
CN112158436A (zh) * 2020-09-18 2021-01-01 东莞市铁生辉制罐有限公司 马口铁罐、马口铁封口结构及其加工工艺
CN113020473A (zh) * 2015-03-11 2021-06-25 皇冠包装技术公司 无环金属罐和方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2154624A1 (fr) * 1971-09-27 1973-05-11 Metal Box Co Ltd
US4483456A (en) * 1982-01-18 1984-11-20 Rheem Manufacturing Company Salvageable industrial container
GB2166410A (en) * 1984-11-01 1986-05-08 Rheem Metalurgica Sa Seaming ends to containers
GB2197606A (en) * 1986-11-21 1988-05-25 Rheem Empreendiumentes Ind Lock seaming an end to a metal body to form a substantially cylindrical container
US4892227A (en) * 1988-04-21 1990-01-09 Packaging Resources Incorporated High barrier plastic container and method of making same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB796664A (en) * 1956-01-19 1958-06-18 Continental Can Co Lower end construction for fibre drums
GB989574A (en) * 1963-02-26 1965-04-22 Metal Containers Ltd Shipping container and method of making the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2154624A1 (fr) * 1971-09-27 1973-05-11 Metal Box Co Ltd
US4483456A (en) * 1982-01-18 1984-11-20 Rheem Manufacturing Company Salvageable industrial container
GB2166410A (en) * 1984-11-01 1986-05-08 Rheem Metalurgica Sa Seaming ends to containers
GB2197606A (en) * 1986-11-21 1988-05-25 Rheem Empreendiumentes Ind Lock seaming an end to a metal body to form a substantially cylindrical container
US4892227A (en) * 1988-04-21 1990-01-09 Packaging Resources Incorporated High barrier plastic container and method of making same

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995003972A1 (fr) * 1993-07-27 1995-02-09 Continental Cup Company Pty. Ltd. Appareil de pose de couvercle sur recipient
US5951451A (en) * 1993-07-27 1999-09-14 L.A.S. Pty. Ltd. Apparatus for fitting lid to a container
DE4440628A1 (de) * 1994-11-14 1996-05-30 Schmalbach Lubeca Gestufter Falz
US5947673A (en) * 1994-11-14 1999-09-07 Schmalbach-Lubeca Ag Stepped seam for a can
CN113020473A (zh) * 2015-03-11 2021-06-25 皇冠包装技术公司 无环金属罐和方法
CN113020473B (zh) * 2015-03-11 2023-10-24 皇冠包装技术公司 无环金属罐和方法
CN111952117A (zh) * 2019-05-14 2020-11-17 马赛尔·P·霍夫萨埃斯 温控开关
US11901144B2 (en) 2019-05-14 2024-02-13 Marcel P. HOFSAESS Temperature-dependent switch
CN112158436A (zh) * 2020-09-18 2021-01-01 东莞市铁生辉制罐有限公司 马口铁罐、马口铁封口结构及其加工工艺

Also Published As

Publication number Publication date
DE4007381A1 (de) 1991-09-12

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