EP0492861B1 - Corps de boîtes - Google Patents
Corps de boîtes Download PDFInfo
- 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
Links
Images
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—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
-
- 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
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)
- Stackable Containers (AREA)
- Non-Alcoholic Beverages (AREA)
- Table Devices Or Equipment (AREA)
- Tea And Coffee (AREA)
- Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Claims (7)
- Corps de boîte métallique pour une boîte de boisson fabriquée par étirage et pressage d'une feuille métallique de façon à comprendre une paroi de fond (2) et une paroi latérale généralement cylindrique (3); la paroi latérale comprenant une partie de fond (4) de section transversale circulaire reliée à la paroi de fond, une partie centrale d'épaisseur de paroi constante s'étendant au-dessus de la partie de fond, et une partie supérieure de section transversale circulaire (6) s'étendant au dessus de la partie centrale et se terminant par une extrémité ouverte; dans lequel la partie supérieure et la partie de fond ont une épaisseur de paroi supérieure à celle de la partie centrale et sont respectivement reliées à la partie centrale par des zones cylindriques supérieure et inférieure (7, 8) dont l'épaisseur de paroi va en se réduisant; caractérisé en ce que la paroi latérale est munie d'une pluralité de panneaux latéraux (11), chacun d'entre eux étant joint au suivant par une nervure longitudinale extérieurement convexe (10), lesdites nervures et panneaux étant espacés de manière égale autour de la circonférence du corps de boîte; et en ce que les nervures et les panneaux s'arrêtent à l'une ou l'autre extrémité à l'intérieur des zones (7, 8) dont l'épaisseur de paroi va en se réduisant.
- Corps de boîte métallique selon la revendication 1, dans lequel chaque panneau présente des zones d'extrémité de forme semi-elliptique, qui sont formées à l'intérieur des zones dont l'épaisseur de paroi va en se réduisant.
- Corps de boîte métallique selon la revendication 2, dans lequel les panneaux sont concaves vers l'extérieur.
- Corps de boîte métallique selon la revendication 2, dans lequel les panneaux sont essentiellement plats.
- Corps de boîte métallique selon l'une quelconque des revendications précédentes, dans lequel le nombre de panneaux est compris entre 24 et 45.
- Corps de boîte métallique selon la revendication 5, dans lequel le nombre de panneaux est environ 30.
- Procédé pour constituer un corps de boîte pour une boîte de boisson selon la revendication 1, comprenant les étapes consistant à :a) découper un disque à partir d'une feuille métallique, étirer une coupelle à partir du disque pour former une paroi de fond et une paroi latérale, et presser la paroi latérale pour former un corps de boîte comprenant une paroi de fond (2) et une paroi latérale généralement cylindrique (3); la paroi latérale comprenant une partie de fond (4) de section transversale circulaire reliée à la paroi de fond, une partie centrale (5) s'étendant au-dessus de la partie de fond, et une partie supérieure (6) de section transverse circulaire s'étendant au-dessus de la partie centrale et se terminant par une extrémité ouverte; dans lequel la partie supérieure (6) et la partie de fond (4) sont formées de manière à avoir une épaisseur de paroi supérieure à la partie centrale (5) et sont respectivement reliées à la partie centrale par des zones cylindriques supérieure et inférieure (7,8) dont l'épaisseur de paroi va en se réduisant;
ledit procédé étant caractérisé par l'étape suivante consistant à :b) former dans la paroi, sans étirage supplémentaire, une pluralité de panneaux latéraux parallèles (11), chacun d'entre eux étant joint au suivant par une nervure longitudinale extérieurement convexe (10), lesdites nervures et panneaux étant espacés de manière égale autour de la circonférence du corps de boîte; et les nervures et les panneaux s'arrêtant à leurs deux extrémités à l'intérieur des zones (7,8) dont l'épaisseur de paroi va en se réduisant.
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 (fr) | 1992-07-01 |
EP0492861B1 true EP0492861B1 (fr) | 1994-08-03 |
Family
ID=10687472
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91311334A Revoked EP0492861B1 (fr) | 1990-12-21 | 1991-12-05 | Corps de boîtes |
Country Status (16)
Country | Link |
---|---|
EP (1) | EP0492861B1 (fr) |
JP (1) | JPH04311445A (fr) |
KR (1) | KR0141910B1 (fr) |
AT (1) | ATE109419T1 (fr) |
AU (1) | AU655440B2 (fr) |
BR (1) | BR9105559A (fr) |
CA (1) | CA2057755C (fr) |
DE (1) | DE69103254T2 (fr) |
DK (1) | DK0492861T3 (fr) |
ES (1) | ES2059064T3 (fr) |
GB (1) | GB2250972B (fr) |
MX (1) | MX9102668A (fr) |
MY (1) | MY107646A (fr) |
NZ (1) | NZ240877A (fr) |
PL (1) | PL166562B1 (fr) |
ZA (1) | ZA919369B (fr) |
Families Citing this family (13)
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 |
US5727414A (en) * | 1995-06-07 | 1998-03-17 | American National Can Company | Method for reshaping a container |
BR9606395A (pt) * | 1995-06-07 | 1998-12-15 | American National Can Co | Recipiente reformado e processo e aparelho para reformar um recipiente |
US5704244A (en) * | 1995-06-07 | 1998-01-06 | American National Can Company | Apparatus for reshaping a container |
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 |
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 |
MY175342A (en) | 2010-08-20 | 2020-06-19 | 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)
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 (fr) * | 1989-10-24 | 1991-05-02 | CarnaudMetalbox plc | Récipients |
Family Cites Families (9)
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 (fr) * | 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 |
-
1990
- 1990-12-21 GB GB9027851A patent/GB2250972B/en not_active Expired - Fee Related
-
1991
- 1991-11-27 ZA ZA919369A patent/ZA919369B/xx unknown
- 1991-11-28 MY MYPI91001883A patent/MY107646A/en unknown
- 1991-12-03 KR KR1019910022079A patent/KR0141910B1/ko not_active IP Right Cessation
- 1991-12-04 AU AU88393/91A patent/AU655440B2/en not_active Ceased
- 1991-12-05 DK DK91311334.6T patent/DK0492861T3/da active
- 1991-12-05 NZ NZ240877A patent/NZ240877A/en unknown
- 1991-12-05 EP EP91311334A patent/EP0492861B1/fr not_active Revoked
- 1991-12-05 ES ES91311334T patent/ES2059064T3/es not_active Expired - Lifetime
- 1991-12-05 DE DE69103254T patent/DE69103254T2/de not_active Revoked
- 1991-12-05 AT AT91311334T patent/ATE109419T1/de not_active IP Right Cessation
- 1991-12-16 CA CA002057755A patent/CA2057755C/fr not_active Expired - Fee Related
- 1991-12-17 JP JP3333583A patent/JPH04311445A/ja active Pending
- 1991-12-18 MX MX9102668A patent/MX9102668A/es not_active IP Right Cessation
- 1991-12-19 PL PL91292871A patent/PL166562B1/pl unknown
- 1991-12-20 BR BR919105559A patent/BR9105559A/pt not_active IP Right Cessation
Patent Citations (3)
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 (fr) * | 1989-10-24 | 1991-05-02 | CarnaudMetalbox plc | Récipients |
Also Published As
Publication number | Publication date |
---|---|
PL166562B1 (pl) | 1995-06-30 |
NZ240877A (en) | 1993-07-27 |
EP0492861A1 (fr) | 1992-07-01 |
GB2250972B (en) | 1994-05-04 |
DE69103254T2 (de) | 1994-11-24 |
BR9105559A (pt) | 1992-09-01 |
KR920011874A (ko) | 1992-07-25 |
DE69103254D1 (de) | 1994-09-08 |
AU8839391A (en) | 1992-06-25 |
CA2057755A1 (fr) | 1992-06-22 |
GB2250972A (en) | 1992-06-24 |
ZA919369B (en) | 1993-05-27 |
ATE109419T1 (de) | 1994-08-15 |
MY107646A (en) | 1996-05-30 |
PL292871A1 (en) | 1992-06-26 |
MX9102668A (es) | 1992-06-01 |
KR0141910B1 (ko) | 1998-07-15 |
AU655440B2 (en) | 1994-12-22 |
DK0492861T3 (da) | 1994-11-07 |
JPH04311445A (ja) | 1992-11-04 |
CA2057755C (fr) | 1996-01-09 |
ES2059064T3 (es) | 1994-11-01 |
GB9027851D0 (en) | 1991-02-13 |
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