EP0697927B2 - Container beading - Google Patents

Container beading Download PDF

Info

Publication number
EP0697927B2
EP0697927B2 EP94900077A EP94900077A EP0697927B2 EP 0697927 B2 EP0697927 B2 EP 0697927B2 EP 94900077 A EP94900077 A EP 94900077A EP 94900077 A EP94900077 A EP 94900077A EP 0697927 B2 EP0697927 B2 EP 0697927B2
Authority
EP
European Patent Office
Prior art keywords
beading
zone
beads
extremity
tool
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
EP94900077A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0697927A1 (en
EP0697927B1 (en
Inventor
Philippe Cochet
Philippe Dubreuil
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 European Holdings SA
Crown Packaging UK Ltd
Original Assignee
CarnaudMetalbox SA
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=9434871&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0697927(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by CarnaudMetalbox SA, Metal Box PLC filed Critical CarnaudMetalbox SA
Publication of EP0697927A1 publication Critical patent/EP0697927A1/en
Publication of EP0697927B1 publication Critical patent/EP0697927B1/en
Application granted granted Critical
Publication of EP0697927B2 publication Critical patent/EP0697927B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B21D15/00—Corrugating tubes
    • B21D15/04—Corrugating tubes transversely, e.g. helically
    • B21D15/06—Corrugating tubes transversely, e.g. helically annularly
    • 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
    • B21D51/02—Making hollow objects characterised by the structure of the objects
    • B21D51/12—Making hollow objects characterised by the structure of the objects objects with corrugated walls

Definitions

  • This invention relates to a method of beading a can according to the preamble of claim 1 (EP-A-0 356 269).
  • Beading of this type is known in which a number of circumferential beads are impressed in the form of grooves which are parallel to each other and regularly spaced to create an annular beading zone.
  • the beading zone is generally located in the central part of the can body, between two smooth annular zones.
  • a method of beading a cylindrical can body comprising squeezing the can body between profiled tool parts to impress grooves which form a predetermined number of annular beads substantially parallel to and regularly spaced from each other, the beads providing an annular beading zone which is located between two smooth zones characterised in that the tool parts include complementary corrugations comprising peaks and troughs, at least one of the corrugations at each extremity of the beading zone being different from the others such that the tool impresses at least one bead at each extremity of the beading zone less deeply than the other beads, whereby axial loading performance is increased without decreasing radial strength of the can.
  • the present invention has the advantage that the axial strength of the can is improved without any reduction in the radial strength. This radial strength is not reduced in comparison with a can having a traditional beading zone formed with equal depth grooves.
  • the gain in mechanical performance when axially loaded over a can having nominally deep beading (0.4mm) has been shown to be of the order of 15%. Thus the performance of the can when axially loaded is greatly increased without decreasing the radial strength.
  • the first deformation which the provision of at least one shallower groove at the extremity of the beading zone has been found to eliminate completely is the problem of "springback".
  • Springback is attributed to radial shrinkage of the metal after beading and leads to a more accentuated corrugation than foreseen, the corrugation projecting outwards at each extremity of the beading zone.
  • any slight overall deformation, known as "en diabolo" of the can body is very greatly reduced by the provision of shallow beading in accordance with the present invention.
  • This deformation results in curvature of the beading zone which decreases the can performance, in particular the ability of the can to withstand axial loads. Even where some slight curvature remains in the beading zone, the axial load performance is greatly improved by the use of shallow beads.
  • at least two shallower beads are provided, usually one at each extremity of the or each beading zone.
  • a plurality of shallower beads may be provided at each end of the or each beading zone.
  • between two and four beads may advantageously be provided at each extremity of the or each beading zone.
  • these may typically increase in depth with distance from the adjacent smooth annular zone.
  • Figure 1 shows a cylindrical can body 11, here formed from a rectangular blank which has had its two longitudinal edges joined and then welded or seamed to form a sleeve. The join is not shown in figure 1.
  • the two extremities 12, 13 of the sleeve have been flanged so as subsequently to form double seams with respective can ends.
  • the can body In order to increase mechanical strength, particularly in the radial direction, the can body has been beaded around its circumference. Shock-resistant beads 15 in the vicinity of the two extremities of the sleeve are shown but do not form part of the present invention.
  • An annular beading zone 17 is provided in the central portion with a number of circular beads 18 in the form of grooves, which are parallel and regularly spaced relative to each other. Consequently, this beading zone is located between two smooth annular zones 19, 20 where the initially cylindrical can body has not undergone any deformation.
  • the beading zone comprises nineteen beads 18, which have been obtained by rotating the can whilst squeezing the can body between a roll 21 and a fixed member 22, as shown in figure 3.
  • Each bead comprises corrugations of adapted dimensions and shapes.
  • the apparatus is shown prior to bringing the roll 21 and fixed member 22 together to bead the can body.
  • At least one bead 18a is impressed less deeply than are the others, this bead being situated at the end of the beading zone.
  • two such shallower beads 18a, 18b have been impressed at each end of the beading zone with different depths increasing from each neighbouring smooth annular zone.
  • Clearly a different number of shallower beads can be provided according to the form of the can.
  • the beads are grooves with inclined sides, so that the side section of the sleeve as shown in figure 2 appears to be approximately sinusoidal in its beading zone.
  • any projection at the junction of the beading zone and each smooth zone has been eliminated and the can body maintains a substantially cylindrical shape after the beading has been formed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Packages (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
  • Printing Methods (AREA)
  • Making Paper Articles (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
EP94900077A 1992-10-27 1993-10-25 Container beading Expired - Lifetime EP0697927B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9212764A FR2697181B1 (fr) 1992-10-27 1992-10-27 Procédé de fabrication d'un corps de boîte pourvu d'une zone de moulurage de raidissement radial et emballage métallique obtenu par un tel procédé.
FR9212764 1992-10-27
PCT/EP1993/002949 WO1994009926A1 (en) 1992-10-27 1993-10-25 Container beading

Publications (3)

Publication Number Publication Date
EP0697927A1 EP0697927A1 (en) 1996-02-28
EP0697927B1 EP0697927B1 (en) 1996-12-04
EP0697927B2 true EP0697927B2 (en) 1999-12-22

Family

ID=9434871

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94900077A Expired - Lifetime EP0697927B2 (en) 1992-10-27 1993-10-25 Container beading

Country Status (13)

Country Link
EP (1) EP0697927B2 (enrdf_load_stackoverflow)
CN (1) CN1089192A (enrdf_load_stackoverflow)
AR (1) AR247840A1 (enrdf_load_stackoverflow)
DE (1) DE69306418T3 (enrdf_load_stackoverflow)
ES (1) ES2095147T5 (enrdf_load_stackoverflow)
FR (1) FR2697181B1 (enrdf_load_stackoverflow)
HU (1) HU217583B (enrdf_load_stackoverflow)
MX (1) MX9306695A (enrdf_load_stackoverflow)
PL (1) PL171992B1 (enrdf_load_stackoverflow)
SG (1) SG47584A1 (enrdf_load_stackoverflow)
TW (1) TW238267B (enrdf_load_stackoverflow)
WO (1) WO1994009926A1 (enrdf_load_stackoverflow)
ZA (1) ZA938010B (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI350933B (en) 2007-02-16 2011-10-21 Au Optronics Corp A backlight module and a wire positioning device thereof
US8978922B2 (en) 2012-05-15 2015-03-17 Silgan Containers Llc Strengthened food container and method
US9382034B2 (en) * 2012-05-15 2016-07-05 Silgan Containers Llc Strengthened food container and method
USD892621S1 (en) 2017-01-26 2020-08-11 Mead Johnson Nutrition Company Container

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR709343A (fr) * 1931-01-06 1931-08-05 Machine pour le façonnement de rainures dans la paroi cylindrique d'un baril en tôle
GB2023039A (en) * 1978-06-13 1979-12-28 Metal Box Co Ltd Apparatus for operating an hollow workpieces
FR2634405A1 (fr) * 1988-07-19 1990-01-26 Carnaud Sa Procede et dispositif de fabrication d'elements tubulaires cylindriques tels que des corps de fut et elements tubulaires cylindriques obtenus selon ce procede

Also Published As

Publication number Publication date
PL308489A1 (en) 1995-08-07
HU217583B (hu) 2000-02-28
EP0697927A1 (en) 1996-02-28
ES2095147T3 (es) 1997-02-01
CN1089192A (zh) 1994-07-13
EP0697927B1 (en) 1996-12-04
FR2697181A1 (fr) 1994-04-29
FR2697181B1 (fr) 1994-12-30
MX9306695A (es) 1994-04-29
HUT70990A (en) 1995-11-28
AR247840A1 (es) 1995-04-28
TW238267B (enrdf_load_stackoverflow) 1995-01-11
ZA938010B (en) 1994-06-09
DE69306418T2 (de) 1997-05-15
DE69306418T3 (de) 2000-05-04
HU9501183D0 (en) 1995-06-28
ES2095147T5 (es) 2000-03-01
PL171992B1 (pl) 1997-07-31
SG47584A1 (en) 1998-04-17
DE69306418D1 (de) 1997-01-16
WO1994009926A1 (en) 1994-05-11

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