EP0425401B1 - Couvercle métallique à ouverture facile pour récipient - Google Patents

Couvercle métallique à ouverture facile pour récipient Download PDF

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Publication number
EP0425401B1
EP0425401B1 EP90470057A EP90470057A EP0425401B1 EP 0425401 B1 EP0425401 B1 EP 0425401B1 EP 90470057 A EP90470057 A EP 90470057A EP 90470057 A EP90470057 A EP 90470057A EP 0425401 B1 EP0425401 B1 EP 0425401B1
Authority
EP
European Patent Office
Prior art keywords
cover
fold
lid
line
container
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
EP90470057A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0425401A1 (fr
Inventor
Jean-François Seconde
Gérard Heurteboust
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.)
Sollac SA
Original Assignee
Sollac SA
Lorraine de Laminage Continu SA SOLLAC
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 Sollac SA, Lorraine de Laminage Continu SA SOLLAC filed Critical Sollac SA
Publication of EP0425401A1 publication Critical patent/EP0425401A1/fr
Application granted granted Critical
Publication of EP0425401B1 publication Critical patent/EP0425401B1/fr
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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • 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
    • B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
    • B21D51/383—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures scoring lines, tear strips or pulling tabs
    • 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
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
    • B65D17/404—Details of the lines of weakness

Definitions

  • the present invention relates to a metal cover intended to be mounted on tight containers called "easy opening” open by simple traction exerted on the cover which then tears along a line of least resistance.
  • watertight metal containers with easy opening such as food "drink” boxes or trays for precooked dishes
  • a metal cover made integral with the upper edge of the body of the box after filling.
  • An incision is previously made on the lid and defines a line of least resistance along which the lid is torn when the box is opened.
  • This opening operation is carried out manually by pulling from a tongue fixed to the cover, after having pierced the incision locally by exerting a pressure or a punctual pull in its vicinity, by means of the front part of the tongue.
  • Such an opening device is described, for example, in documents FR-A-2034997 and FR-A-2043618.
  • Such a device is used on covers made either of aluminum or of coated steel (tin or chrome).
  • Steel has a number of advantages, in particular its low cost, the good service properties of the containers thus produced, and the ease of recycling empty packaging.
  • the mechanical characteristics of the thin irons usually used which are thick from 0.20 mm to 0.25 mm, require that the user provide a relatively large tensile force to open the box which can in particular result in small well-known drawbacks during the sudden transfer of the resistance from the tearing off of the cover.
  • the operation of sparing the incision called “indentation” is costly because of the wear and the high price of the tools necessary for its production, and the loss of productivity which it causes.
  • the indentation which corresponds to a local reduction in the thickness of the cover, can lead to deterioration of the protective coating on both sides of the cover.
  • the external coating must be repaired in order to avoid corrosion of the cover at the level of the incision, and repair of the internal coating is also recommended for reasons of food hygiene.
  • the document FR-A-1579365 describes a cover in which the cover and its line of least resistance are produced by stamping. However, the choice of material is limited to aluminum or similar materials.
  • the object of the invention is to reduce the manufacturing cost of easy-opening steel box lids, while facilitating the opening operation and allowing the use of steel.
  • the subject of the invention is a lid for a sealed container which can be opened along a line of least resistance by simple pull, as defined in claim 1.
  • this cover is made of steel with a thickness of 0.10 to 0.16 mm, and at the fold, the internal radius of curvature of the cover is from 10 to 50 ⁇ m, and the external radius of curvature of the cover is 100 to 200 ”m
  • this fold forms a closed line located in the vicinity of the periphery of the cover so as to allow total opening of the box.
  • the invention consists in materializing the line of least resistance along which the opening of the lid is carried out no longer by a pre-incision, but by a well-marked fold obtained by stamping a thin sheet of steel .
  • This stamping operation results in a local reduction in thickness of the cover without removal of material. This reduction in thickness is therefore obtained without using consumable tools and without damaging the coatings on the two faces of the cover.
  • Figure 1 shows the body 1 of the box and the cover 2.
  • the cover 2 Prior to its installation on the body of the box, the cover 2 is cut and then shaped by stamping.
  • This stamping operation can optionally include in known manner a "paneling" of the cover, that is to say the provision of rectilinear folds 3 forming relief engravings facing the outside or inside of the box.
  • folds are intended to promote the winding of the cover on itself during the opening operation, and also to allow the cover to expand and contract during treatments involving a rise in temperature, such as sterilization or pasteurization, which the box may undergo once filled.
  • These folds can also be in the form of circular steps.
  • FIG. 2 details the zone II of FIG. 1, that is to say the fold 4 of the cover 2. It shows that the cover 2 has a nominal thickness e, but that at the level of the fold 4, this thickness is reduced under the effect of the deformations inherent in the stamping forming operation, and takes a minimum value e ′.
  • the cover must be thin enough to allow easy tearing according to the fold, taking into account the mechanical properties of the base material used. But this material must be stiff enough for the tear to take place according to the fold, and not in any direction that the user could not control.
  • a steel with a low or very low carbon content is used, of thickness 0.10 to 0.16 mm and with an elastic limit between 500 and 600 MPa.
  • the radii of curvature of the cover at the fold are, for the internal radius of curvature, from 10 to 50 "m, and for the external radius of curvature, from 100 to 200" m.
  • the local thinning ⁇ e resulting from the maintenance of the fold is from 70 to 100 »m.
  • FIG. 3 illustrates another variant of the invention, in which the vertical panel 6 overhangs the horizontal pan 5.
  • the fixing of the cover 2 on the body of the box 1 is ensured by folding one on the other (crimping) of their outer edges, as shown schematically in Figures 1 and 3, or by gluing, or by any other known means .
  • the fold constituting the line of least resistance forms a closed line located in the vicinity of the periphery of the cover, so as to allow a total opening of the box.
  • the invention is not limited to the example which has just been described and shown.
  • the main thing is that the cover has a tear capacity and a sufficient stiffness to make possible the implementation of the proposed solution.
  • the fold forming the line of least resistance may limit only a portion substantially less than the entire cover, so as to achieve only a partial opening of the box. It is thus possible to form an opening in the form of a pouring spout, of the type usually encountered on "drink" cans.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Packages (AREA)
EP90470057A 1989-10-27 1990-10-10 Couvercle métallique à ouverture facile pour récipient Expired - Lifetime EP0425401B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8914383A FR2653750B1 (fr) 1989-10-27 1989-10-27 Couvercle metallique a ouverture facile pour recipient.
FR8914383 1989-10-27

Publications (2)

Publication Number Publication Date
EP0425401A1 EP0425401A1 (fr) 1991-05-02
EP0425401B1 true EP0425401B1 (fr) 1994-07-06

Family

ID=9387032

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90470057A Expired - Lifetime EP0425401B1 (fr) 1989-10-27 1990-10-10 Couvercle métallique à ouverture facile pour récipient

Country Status (13)

Country Link
US (1) US5147058A (fi)
EP (1) EP0425401B1 (fi)
JP (1) JPH03148445A (fi)
KR (1) KR910007765A (fi)
AT (1) ATE108159T1 (fi)
CA (1) CA2028545A1 (fi)
DE (1) DE69010451T2 (fi)
DK (1) DK0425401T3 (fi)
ES (1) ES2058863T3 (fi)
FI (1) FI94114C (fi)
FR (1) FR2653750B1 (fi)
NO (1) NO904591L (fi)
PT (1) PT95714A (fi)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0542104B1 (en) * 1991-11-08 1999-04-21 Nippon Steel Corporation Coated steel can lid with opening arrangement not requiring repair coating on outer and inner surfaces
KR200289188Y1 (ko) 2002-06-11 2002-09-13 전정욱 오픈 기능성이 개선된 캔뚜껑
SI1964784T1 (sl) * 2007-02-28 2010-08-31 Impress Group Bv Konzerva z zlahka odstranljivim pokrovom, zlahka odstranljivi pokrov ter pripadajoäśi pokrov
USD638704S1 (en) 2010-12-10 2011-05-31 Pactiv Corporation Container lid
USD637489S1 (en) 2010-12-10 2011-05-10 Pactiv Corporation Pull grip feature of a container lid
US10538368B2 (en) 2011-12-15 2020-01-21 Jrap, Inc. Lids for beverage containers
KR102084018B1 (ko) * 2018-10-18 2020-05-22 주식회사 큐비에스 정수기용 수탱크의 케이스 결합구조 및 그 형성방법

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2120186A (en) * 1937-01-28 1938-06-07 Continental Can Co Easy opening sheet metal container
US2187433A (en) * 1937-01-28 1940-01-16 Continental Can Co Method of forming an easy opening container
US2119533A (en) * 1937-05-10 1938-06-07 Continental Can Co Easy opening container
US3362570A (en) * 1964-08-24 1968-01-09 Joseph A. Geiger Container with breakable end closure
NL6812715A (fi) * 1967-09-09 1969-03-11
DE6947543U (de) * 1969-12-08 1970-03-26 Schmalbach Lubeca Voll-aufreissdeckel aus blech fuer dosen od. dgl.
US3715050A (en) * 1971-02-25 1973-02-06 American Can Co Full panel easy open end
US3820681A (en) * 1972-04-06 1974-06-28 Orbital Container Corp Score-line structure
US4159061A (en) * 1975-09-08 1979-06-26 Collins Robert E Pop-a-top canning jar lids
US4003495A (en) * 1976-04-26 1977-01-18 Usm Corporation Can cover openable by a spoon or the like
US4144994A (en) * 1978-08-04 1979-03-20 Container Corporation Of America Closure structure for containers
US4215795A (en) * 1979-02-02 1980-08-05 Owens-Illinois, Inc. End structure for a can body and method of making same
US4258859A (en) * 1979-02-02 1981-03-31 Boise Cascade Corporation No-fin scored metal ends for containers
US4254890A (en) * 1979-08-27 1981-03-10 Boise Cascade Corporation Non-sliver scored metal end
US4762579A (en) * 1985-12-03 1988-08-09 Toyo Seikan Kaisha, Ltd. Process for producing easily openable closure
US4753365A (en) * 1987-07-02 1988-06-28 Solo Cup Company Lid with removable tab

Also Published As

Publication number Publication date
DE69010451T2 (de) 1994-12-01
ATE108159T1 (de) 1994-07-15
NO904591L (no) 1991-04-29
KR910007765A (ko) 1991-05-30
ES2058863T3 (es) 1994-11-01
DE69010451D1 (de) 1994-08-11
CA2028545A1 (fr) 1991-04-28
EP0425401A1 (fr) 1991-05-02
DK0425401T3 (da) 1994-11-14
FI94114B (fi) 1995-04-13
JPH03148445A (ja) 1991-06-25
FR2653750A1 (fr) 1991-05-03
PT95714A (pt) 1991-09-13
FI905263A0 (fi) 1990-10-25
FR2653750B1 (fr) 1992-01-24
FI94114C (fi) 1995-07-25
NO904591D0 (no) 1990-10-24
US5147058A (en) 1992-09-15

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