EP0492861B1 - Dosenkörper - Google Patents

Dosenkörper Download PDF

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Publication number
EP0492861B1
EP0492861B1 EP91311334A EP91311334A EP0492861B1 EP 0492861 B1 EP0492861 B1 EP 0492861B1 EP 91311334 A EP91311334 A EP 91311334A EP 91311334 A EP91311334 A EP 91311334A EP 0492861 B1 EP0492861 B1 EP 0492861B1
Authority
EP
European Patent Office
Prior art keywords
panels
central portion
wall
wall thickness
ribs
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.)
Revoked
Application number
EP91311334A
Other languages
English (en)
French (fr)
Other versions
EP0492861A1 (de
Inventor
Paul Charles Claydon
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 Packaging UK Ltd
Original Assignee
CarnaudMetalbox PLC
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=10687472&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0492861(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by CarnaudMetalbox PLC, Metal Box PLC filed Critical CarnaudMetalbox PLC
Publication of EP0492861A1 publication Critical patent/EP0492861A1/de
Application granted granted Critical
Publication of EP0492861B1 publication Critical patent/EP0492861B1/de
Anticipated expiration legal-status Critical
Revoked 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
    • B21D51/2646—Of particular non cylindrical shape, e.g. conical, rectangular, polygonal, bulged
    • 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—Rigid or semi-rigid 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 or by deep-drawing operations performed on sheet material
    • B65D1/12—Cans, casks, barrels, or drums
    • 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—Rigid or semi-rigid 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 or 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

Definitions

  • the invention relates to metal can bodies for beverage cans.
  • Such can bodies are adapted to be closed by a can end seamed to the open end of the can body to form a closed can.
  • Known can bodies for beverage cans are made by drawing and ironing sheet metal to comprise a bottom end wall and a generally cylindrical side wall; the side wall comprising a bottom portion of circular cross section connected to the bottom wall, a central portion of constant wall thickness extending above the bottom portion, and a top portion of circular cross section extending above the central portion and terminating in an open end; wherein the top portion and bottom portion are of greater wall thickness than the central portion and are respectively connected to the central portion through upper and lower cylindrical zones of reducing wall thickness.
  • Such can bodies are described in GB-A-1320061 and US-A-3,989,159.
  • dents may be made in the cylindrical wall and these dents provide localised points of weakness which can lead to creasing during necking and flanging of the neck of the can body, and filling double seaming of the can end onto the can body during which the can body is subjected to an axial load. It has been found that the provision of a plurality of parallel longitudinally extending outwardly convex ribs in the central portion of the can body will reduce or eliminate the effect of such dents and give axial strength to the can.
  • EP-A-0425124 (published after the priority date of the present application) describes a metal can body for a beverage can made by drawing and ironing sheet metal to comprise a bottom end wall and a generally cylindrical side wall; the side wall comprising a cylindrical bottom portion connected to the bottom wall, a central portion of constant wall thickness extending above the bottom portion, and a cylindrical top portion extending above the central portion and terminating in an open end; wherein the top portion and bottom portion are of greater wall thickness than the central portion and are respectively connected to the central portion through upper and lower cylindrical zones of reducing wall thickness; and wherein the side wall is provided with a plurality of parallel sided panels each formed to the next by an externally convex longitudinal rib, said ribs and panels being equally spaced around the circumference of the can body.
  • the invention provides a metal can body for a beverage can made by drawing and ironing sheet metal to comprise a bottom end wall and a generally cylindrical side wall; the side wall comprising a bottom portion of circular cross section connected to the bottom wall, a central portion of constant wall thickness extending above the bottom portion, and a top portion of circular cross section extending above the central portion and terminating in an open end; wherein the top portion and bottom portion are of greater wall thickness than the central portion and are respectively connected to the central portion through upper and lower cylindrical zones of reducing wall thickness; characterised in that the side wall is provided with a plurality of parallel sided panels each joined to the next by an externally convex longitudinal rib, said ribs and panels being equally spaced around the circumference of the can body; and in that the ribs and panels terminate at either end within the zones of reducing wall thickness.
  • the inventor provides a method of forming a can body for a beverage can comprising the steps of
  • the can body 1 comprises a bottom end wall 2, which in this case is domed, and a side wall 3.
  • the side wall 3 comprises a bottom portion 4 connected to the bottom end wall, a central portion 5 and a top portion 6 terminating in an open end.
  • the top portion 6 and bottom portion 4 are of greater wall thickness than the central portion 5 and are respectively connected to the central portion 5 through upper and lower cylindrical zones 7,8 which have a wall thickness which reduces towards the central portion 5.
  • the wall thickness of the top portion will be about 0.15mm (.0060 inches), central portion about 0.1mm (.0040 inches), and bottom portion about 0.3mm (.0120 inches).
  • the can body of Figure 1 is formed by blanking a disc from sheet metal, drawing a cup from the disc to form a bottom end wall and a side wall, and wall ironing the side wall.
  • Figure 2 shows the can body after the provision of a plurality of parallel longitudinally extending convex ribs 10 equally spaced around the circumference.
  • the ribs 10 terminate in the zones 7, 8.
  • Adjacent ribs define elongate panels 11 therebetween Each panel 11 has semi-elliptical shaped end areas formed within the zones 7,8.
  • the ribs and panels extend into the zones 7,8 to optimize the can body performance by providing strengthening columns connecting the upper and lower portions 4, 6 of relatively great wall thickness.
  • Figure 3 shows the can body after necking and flanging of the top portion 6 in readiness for receiving a can end to be seamed to the flange 12 in known manner.
  • Figure 4 shows the thickness profile of the side wall as it varies through the height of the can body.
  • Figures 1-4 show a can body provided with only 24 ribs 10 and panels 11. It is believed that can bodies having from about 24 to about 45 ribs are useful for beverage cans. If the number of ribs is less than about 24 there is a significant reduction in the volume of the finished can.
  • Figures 5 and 6 show a can body having 30 ribs 10 and panels 11.
  • Each rib is outwardly convex having a radius P and lies on a circle of radius R where R is the radius of the can body in the middle of the central portion prior to formation of the ribs.
  • the panels 11 are outwardly concave and have a radius U.
  • the concavity of the panels 11 has been exaggerated in Figures 5 and 6.
  • the ratio of U:P is preferably at least 20:1.
  • the rib radius P will be about 1mm.
  • the panels are substantially flat.
  • the ribs 10 will lie on a circle whose radius is very slightly greater than the radius R prior to formation of the ribs and panels.
  • the top and bottom portions 6 and 4 have a slightly greater radius than the central portion and the radius of the central portion of the can body after formation of the ribs will be no greater than the radius of the top and bottom portions. This is important in handling since the can body must roll truly.
  • Figures 9 and 10 show a mandrel 20 used in formation of the ribs and panels.
  • the can body is located over the mandrel which is then rolled along an external forming rail (not shown).
  • the ribs are formed prior to necking of the can body but nevertheless the mandrel must be of smaller radius than the can body so that it can be extracted from the can body. To this end it is formed with less ribs than the can body.
  • the mandrel 20 has 29 ribs 21 for forming a can body with 30 ribs. Between the ribs 21 on the mandrel are panels 22 which are outwardly concave. The profiles of the panels 22 will determine the profiles of the panels 11 in the can body.
  • FIG. 9 and 10 is for forming the can body of Figs. 7 and 8 having substantially flat panels 11.
  • the side wall of the central portion of the can body is locally deformed to the profile of the mandrel 20 but due to the natural resilience of the material the panels of the can body will subsequently spring back to a substantially flat profile.
  • the panels 22 of the mandrel 20 are formed more deeply concave. The depth of the panel must, however, be relatively shallow to avoid excessive loss of volume and to prevent the panels from reversing when subjected to internal pressure as would be experienced when the can is filled with a carbonated drink.
  • the improved performance of can bodies as a result of the panelling may be used to increase the axial load strength, or to allow a reduction of the wall thickness of the central portion 5 without loss of axial strength. Comparative tests have shown that the performance of panelled can bodies having a wall thickness in the central portion of 101.6 x 10 ⁇ 3 mm (40x10 ⁇ 4 inches) is comparable to that of unpanelled can bodies of wall thickness 109.2 x 10 ⁇ 3 mm (43x10 ⁇ 4 inches). Considering the large number of can bodies made, this represents a very significant saving.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Medicinal Preparation (AREA)
  • Materials For Medical Uses (AREA)
  • Basic Packing Technique (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Polyesters Or Polycarbonates (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Stackable Containers (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
  • Table Devices Or Equipment (AREA)
  • Tea And Coffee (AREA)
  • Non-Alcoholic Beverages (AREA)

Claims (7)

  1. Metallgefäßkörper für eine durch Tiefziehen und Abstreckziehen eines Metallbleches hergestellte Getränkedose mit einer Fußabschlußwand (2) und einer im allgemeinen zylindrischen Seitenwand (3), bei dem die Seitenwand einen mit der Fußwand verbundenen Fußabschnitt (4) mit kreisförmigem Querschnitt aufweist, mit einem Zentralabschnitt mit gleichbleibender Wandstärke, der sich über den Fußabschnitt erstreckt, und mit einem Kopfabschnitt mit kreisförmigem Querschnitt (6), der sich über den Zentralabschnitt erstreckt und mit einem offenen Ende abschließt, wobei der Kopfabschnitt und der Fußabschnitt eine größere Wandstärke als der Zentralabschnitt aufweisen und jeweils mit dem Zentralabschnitt über obere und untere zylindrische Bereiche mit abnehmender Wandstärke (7, 8) verbunden sind, dadurch gekenn zeichnet, daß die Seitenwand mit einer Vielzahl von parallel aneinandergrenzenden Vertiefungsfeldstücken (11) versehen ist, von denen jedes an das nächste mit einer nach außen konvexen Längsrippe (10) angefügt ist, wobei die Rippen und die Vertiefungsfeldstücke über den Umfang des Gefäß- körpers gleichmäßig beabstandet sind, und daß die Rippen und Vertiefungsfeldstücke an jedem Ende in den Bereichen mit abnehmender Wandstärke (7, 8) abschließen.
  2. Metallgefäßkörper nach Anspruch 1, bei dem jedes Vertiefungsfeldstück halbelliptisch ausgestaltete Endbereiche hat, die innerhalb der Bereiche mit abnehmender Wandstärke gebildet sind.
  3. Metallgefäßkörper nach Anspruch 2, bei dem die Vertiefungsfeldstücke nach außen konkav sind.
  4. Metallgefäßkörper nach Anspruch 2, bei dem die Vertiefungsfeldstücke im wesentlichen flach sind.
  5. Metallgefäßkörper nach einem der vorstehenden Ansprüche, bei dem die Zahl der Vertiefungsfeldstücke zwischen 24 und 45 ist.
  6. Metallgefäßkörper nach Anspruch 5, bei dem die Zahl der Vertiefungsfeldstücke etwa 30 ist.
  7. Verfahren zum Herstellen eines Gefäßkörpers für eine Getränkedose nach Anspruch 1 mit den Schritten
    a) des Schneidens einer Scheibe aus Metallblech, Tiefziehen einer Kappe aus der Scheibe zum Formen einer Fußabschlußwand und einer Seitenwand, und Abstreckziehen der Seitenwand zum Bilden eines Gefäßkörpers mit einer Fußabschlußwand (2) und einer im wesentlichen zylindrischen Seitenwand (3), bei dem die Seitenwand einen an die Fußabschlußwand angebrachten Fußabschnitt (4) mit kreisförmigem Querschnitt, einen Zentralabschnitt (5), der sich über den Fußabschnitt erstreckt, und einen Kopfabschnitt (6) mit kreisförmigem Querschnitt aufweist, der sich über den Zentralabschnitt erstreckt und mit einem offenen Ende abschließt, wobei der Kopfabschnitt (6) und der Fußabschnitt (4) mit einer größeren Wandstärke als der Zentralabschnitt (5) gebildet sind und jeweils mit dem Zentralabschnitt über obere und untere zylindrische Bereiche (7, 8) mit abnehmender Wandstärke verbunden sind, gekennzeichnet durch den folgenden Schritt
    b) des Formens ohne weiteres Strecken einer Vielzahl von parallel nebeneinander angeordneter Vertiefungsfeldstücke (11) in der Seitenwand, von denen jedes an das nächste durch eine nach außen konvexe Längsrippe (10) angeformt ist, bei dem die Rippen und Vertiefungsfeldstücke über den Umfang des Gefäßkörpers gleichmäßig beabstandet sind, wobei die Rippen und Vertiefungsfeldstücke mit ihren beiden Enden in den Bereichen (7, 8) mit abnehmender Wandstärke abschließen.
EP91311334A 1990-12-21 1991-12-05 Dosenkörper Revoked EP0492861B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9027851 1990-12-21
GB9027851A GB2250972B (en) 1990-12-21 1990-12-21 Can bodies

Publications (2)

Publication Number Publication Date
EP0492861A1 EP0492861A1 (de) 1992-07-01
EP0492861B1 true EP0492861B1 (de) 1994-08-03

Family

ID=10687472

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91311334A Revoked EP0492861B1 (de) 1990-12-21 1991-12-05 Dosenkörper

Country Status (16)

Country Link
EP (1) EP0492861B1 (de)
JP (1) JPH04311445A (de)
KR (1) KR0141910B1 (de)
AT (1) ATE109419T1 (de)
AU (1) AU655440B2 (de)
BR (1) BR9105559A (de)
CA (1) CA2057755C (de)
DE (1) DE69103254T2 (de)
DK (1) DK0492861T3 (de)
ES (1) ES2059064T3 (de)
GB (1) GB2250972B (de)
MX (1) MX9102668A (de)
MY (1) MY107646A (de)
NZ (1) NZ240877A (de)
PL (1) PL166562B1 (de)
ZA (1) ZA919369B (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5279442A (en) * 1991-12-18 1994-01-18 Ball Corporation Drawn and ironed container and apparatus and method for forming same
GB9324910D0 (en) * 1993-12-04 1994-01-26 Metal Box Plc Containers
US5593056A (en) * 1995-05-08 1997-01-14 Pepsico., Inc. Rib for plastic container
US5704244A (en) * 1995-06-07 1998-01-06 American National Can Company Apparatus for reshaping a container
US5727414A (en) * 1995-06-07 1998-03-17 American National Can Company Method for reshaping a container
JPH10503715A (ja) * 1995-06-07 1998-04-07 アメリカン ナショナル カン カンパニー 再成形容器及び容器を成形するための方法及び装置
JP3441317B2 (ja) * 1996-10-21 2003-09-02 大和製罐株式会社 胴部に凹凸模様をもつ変形金属缶の製造方法
RU2139816C1 (ru) * 1999-02-12 1999-10-20 Общество с ограниченной ответственностью "Технополис" Металлический сосуд
US7726165B2 (en) 2006-05-16 2010-06-01 Alcoa Inc. Manufacturing process to produce a necked container
US7934410B2 (en) 2006-06-26 2011-05-03 Alcoa Inc. Expanding die and method of shaping containers
CA2807696C (en) 2010-08-20 2019-01-08 Alcoa Inc. Shaped metal container and method for making same
US9327338B2 (en) 2012-12-20 2016-05-03 Alcoa Inc. Knockout for use while necking a metal container, die system for necking a metal container and method of necking a metal container
JP6406033B2 (ja) * 2015-01-28 2018-10-17 工機ホールディングス株式会社 遠心機及び遠心機用スイングロータ
PL426328A1 (pl) * 2018-03-20 2019-09-23 Can-Pack Spółka Akcyjna Puszka metalowa

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB703836A (en) * 1948-12-11 1954-02-10 Sava Byron Franghia Improvements in or relating to cartons or containers
DE3216660A1 (de) * 1981-05-12 1982-12-16 Cantec, Inc., Fort Worth, Tex. Dose aus duennwandigem material und verfahren zu deren herstellung
EP0425124A1 (de) * 1989-10-24 1991-05-02 CarnaudMetalbox plc Behälter

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1378442A (en) * 1917-11-16 1921-05-17 Lanston Monotype Machine Co Process of corrugating cylindrical bodies
FR584867A (de) * 1924-08-05 1925-02-17
GB243947A (en) * 1925-02-27 1925-12-10 Arthur Charles Giles Improvements in the production of sheet metal cylinders, drums and like containers and in apparatus used therein
US3335902A (en) * 1964-12-28 1967-08-15 Continental Can Co Superimposed axial-circumferential beading of cans
GB1120576A (en) * 1966-07-07 1968-07-17 Plastic Can Corp Improvements in and relating to drawing articles from a blank of ductile metal
US4169537A (en) * 1978-03-22 1979-10-02 Centennial Plastics Co., Inc. Storage drum
CH656366A5 (de) * 1981-05-12 1986-06-30 Cantec Inc Dose aus duennwandigem blech.
DE3118783C2 (de) * 1981-05-12 1986-02-20 Cantec, Inc., Fort Worth, Tex. Vorrichtung zum Sicken des Rumpfes eines Blechgebindes
US4578976A (en) * 1984-04-09 1986-04-01 National Can Corporation Container processing apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB703836A (en) * 1948-12-11 1954-02-10 Sava Byron Franghia Improvements in or relating to cartons or containers
DE3216660A1 (de) * 1981-05-12 1982-12-16 Cantec, Inc., Fort Worth, Tex. Dose aus duennwandigem material und verfahren zu deren herstellung
EP0425124A1 (de) * 1989-10-24 1991-05-02 CarnaudMetalbox plc Behälter

Also Published As

Publication number Publication date
AU655440B2 (en) 1994-12-22
AU8839391A (en) 1992-06-25
ES2059064T3 (es) 1994-11-01
GB9027851D0 (en) 1991-02-13
ATE109419T1 (de) 1994-08-15
KR0141910B1 (ko) 1998-07-15
JPH04311445A (ja) 1992-11-04
MX9102668A (es) 1992-06-01
BR9105559A (pt) 1992-09-01
EP0492861A1 (de) 1992-07-01
CA2057755C (en) 1996-01-09
GB2250972A (en) 1992-06-24
NZ240877A (en) 1993-07-27
DK0492861T3 (da) 1994-11-07
MY107646A (en) 1996-05-30
DE69103254T2 (de) 1994-11-24
CA2057755A1 (en) 1992-06-22
DE69103254D1 (de) 1994-09-08
KR920011874A (ko) 1992-07-25
PL166562B1 (pl) 1995-06-30
GB2250972B (en) 1994-05-04
ZA919369B (en) 1993-05-27
PL292871A1 (en) 1992-06-26

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