ZA200508349B - Can comprising a foil seal - Google Patents
Can comprising a foil seal Download PDFInfo
- Publication number
- ZA200508349B ZA200508349B ZA200508349A ZA200508349A ZA200508349B ZA 200508349 B ZA200508349 B ZA 200508349B ZA 200508349 A ZA200508349 A ZA 200508349A ZA 200508349 A ZA200508349 A ZA 200508349A ZA 200508349 B ZA200508349 B ZA 200508349B
- Authority
- ZA
- South Africa
- Prior art keywords
- bead
- membrane
- edge
- foil
- casing
- Prior art date
Links
- 239000011888 foil Substances 0.000 title claims abstract description 29
- 239000011324 bead Substances 0.000 claims abstract description 60
- 239000012528 membrane Substances 0.000 claims abstract description 49
- 238000007789 sealing Methods 0.000 claims abstract description 15
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 238000004026 adhesive bonding Methods 0.000 claims description 2
- 230000008719 thickening Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000000123 paper Substances 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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
- B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
- B65D77/10—Container closures formed after filling
- B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
- B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
-
- 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
- B65D51/00—Closures not otherwise provided for
- B65D51/18—Arrangements of closures with protective outer cap-like covers or of two or more co-operating closures
-
- 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
- B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
- B65D77/10—Container closures formed after filling
- B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
- B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
- B65D77/2028—Means for opening the cover other than, or in addition to, a pull tab
- B65D77/2032—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container
-
- 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
- B65D2251/00—Details relating to container closures
- B65D2251/0003—Two or more closures
- B65D2251/0006—Upper closure
- B65D2251/0018—Upper closure of the 43-type
-
- 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
- B65D2251/00—Details relating to container closures
- B65D2251/0003—Two or more closures
- B65D2251/0068—Lower closure
- B65D2251/0093—Membrane
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Closures For Containers (AREA)
- Laminated Bodies (AREA)
- Rigid Containers With Two Or More Constituent Elements (AREA)
- Packages (AREA)
- Materials For Medical Uses (AREA)
Abstract
A can includes a membrane seal (5), which has a continuous bead (3) in the can casing (1), the bead facing inwards in the vicinity of the can edge (8), preferably at a distance of between 1 and 10 mm from the edge. The bead is connected in a sealed manner to a sealing membrane (5), for example a foil membrane, in particular a tear-open foil. The upper part (3a) of the bead facing the can edge and the lower part (3b) of the bead facing the interior of the can, viewed when the can is upright, extend inwards either horizontally or obliquely in a uniform or alternating manner. The bead (3) can have an approximately semi-circular or triangular cross-section and preferably has an oblique lower part (3b) in order to completely empty the can. In one embodiment, a lid (7) engages in a positive fit with the bead (3) by an edge thickening (6).
Description
CAN COMPRISING A FOIL SEAL
The invention relates to a can comprising a membrane seal, in which a sealing membrane is sealed to a bead which is completely continuous in the top region of the can casing, in order, in the case of an excess pressure occurring in the interior of the can, to effectively counteract the resultant peeling forces on the contact surface of the membrane with the can casing.
Some cans are sealable again by means of a closure after they have been opened, while others, in particular disposal cans, are emptied after they have been opened and, depending on the material from which they are made, are disposed of as wastes. Cans are as a rule produced from cardboard, from plastic or from a thin sheet metal material.
A membrane foil, as a rule comprising paper or comprising aluminium, is often used as sealing material for cans. There is a large number of known solutions for this purpose, only a few types of which are to be listed here. Frequently, a membrane foil in the form of a disc sealing the can opening and having a projecting collar is sealed onto the inner wall of the can by means of this collar in the region of the can opening.
Thus, for example, EP 0 700 838 discloses a can having a conical can casing which opens slightly upwards in the top region and onto which a sealing membrane is sealed on the inside. The aim of EP 0 700 838 is firstly to replace conventional sheet metal lids by a membrane and secondly to depart from purely vertical sealing of the membrane to the inner wall of the can and the associated technical difficulty with the use of
U-shaped preformed membranes in relation to tolerance- related diameter variations of the can.
When pressure is exerted from the inside on the membrane, for example during filling of the can or during transport in an aircraft, a peeling force acts on the connection of the membrane foil with the flange.
The connection therefore has to be relatively strong in order to be able to counteract the peeling force, which however in turn makes it more difficult to tear off the foil.
While beads in the can casing have generally been used to date to prevent injury in the case of ring pull sheet metal 1lids, the prior art discloses only a few cans having a bead for other purposes, which however differ from the invention by having other objects and other measures. Thus, for example, FR 917 018 intends to ensure a fixed position for the membrane disc and, for this purpose, uses a bead as a stop for the membrane collar during sealing. GB 532 834 in turn intends to seal the can with a membrane disc. The inward-rolled can edge holds the disc edge resting on the horizontal bead part.
Another type of cans having a bead and having a membrane seal is described in the document
CH-A5-643.502. In the case of this known solution, the opening of the can is covered with a membrane which is sealed on a continuous flange produced by pressing flat the can casing material. Such a flange has a large number of disadvantages and therefore has not become established in practice at all: it is difficult to be produced and in fact can be produced only in a plurality of operations; it weakens the can casing material owing to the sharp bends; it prevents residue- free emptying of the can; it yields in a springy manner when the membrane is sealed on. In one embodiment, an additional bead is provided which serves for ensuring that the can lid is securely held in the can body in the closed position of said can lid, which is even more complicated with respect to production and requires even more material. This additional material requirement may appear slight in the «case of an individual can but is important in the case of mass- produced articles, as such cans are. With regard to the strong competition in this area, every additional requirement, even a slight one, is a disadvantage which as far as possible should be avoided.
It is therefore the object of the invention to eliminate the stated disadvantages of the known prior art in the case of cans having membrane seals. The object is addressed, according to the invention, especially by the provision of a can which has, in the top region, just below the can edge, preferably at a distance of 1 to not more than 10 mm below the can edge, an inward-directed bead which runs over the entire can circumference and to the top of which a
AMENDED SHEET DATED 22 DECEMBER 2006 sealing membrane is sealed.
In this context, the term "top" is to be understood as meaning that side of the bead which faces the can edge. "Bottom" of the bead is to be understood as meaning that side of the bead which faces the interior of the can.
Further developments and advantageous developments of the invention are described in the characterizing clauses of the dependent Claims.
The bead according to the invention has a sufficient axial extension and optionally can be produced - in a manner known per se - by rolling in a single operation.
Moreover, it is scarcely springy when the sealing membrane, for example a membrane foil, is sealed on.
This also makes the connection of the membrane foil sealing the can to the can casing more stable and nevertheless does not make it more difficult to tear open the membrane foil. As a result of the formation of the bead according to the invention as shown in
Figures 1, 2 and 3b, the can can moreover be emptied virtually without leaving a residue, and the weakening of the can casing is minimal. As a result of the arrangement of the bead immediately or shortly below the can edge, the internal volume of the can is fully utilized up to the possible upper limit.
The present invention relates to a can comprising a membrane seal which has, in the can casing, in the region of the can opening, preferably at a distance of 1 to 10 mm from the can edge, a bead which runs around the entire can circumference and is sealed with a sealing membrane, for example a membrane foil, in particular a tear-open foil, the top facing the can opening or facing the can edge and the bottom of the bead facing the interior of the can - considered when the can is upright - running uniformly or alternately either horizontally or obliquely inwards. In principle any combination of horizontal and/or oblique bead top and bottom is within the scope of the present invention. However, it is preferable if at least the bottom of the bead is oblique in order to facilitate complete emptying of the can. The tight seal between closure membrane and can bead can be achieved by suitable measures, such as, for example, by adhesive bonding or heat sealing.
The invention makes it possible to seal the membrane foil, which may preferably consist of paper or aluminium, with the oblique or horizontal top of the bead, either with the aid of adhesive applied to this part - either freshly or, after «cooling thereof, subsequently by heating - or to seal said membrane foil with the aid of a heat-seal layer applied to the foil.
However, this also ensures better retention of the membrane foil to prevent unintentional removal (peeling off) of the foil from the bead from the inside, because only a part of the upward-directed, internal force is effected in the direction of raising of the adhesive surface.
Further features, advantageous and details of the invention will now be explained in more detail with reference to the drawings. There:
Fig. 1 shows a first embodiment comprising fastening of the membrane foil to a semicircular bead and to the perpendicular part of the inner wall of the can with the collar of the membrane foil;
Fig. 2 shows a second embodiment comprising fastening of the membrane foil without a collar to a triangular bead which is arranged immediately below the upper can edge; and
Fig. 3a and b shows further embodiments of the bead according to the invention.
A can casing 1 shown in Fig. 1 has a roll 4 at the upper can edge 8. Slightly below the upper can edge 8, i.e. preferably at a distance of 1 to 10 mm from the can edge, an inward-facing, semicircular bead 3 is formed. On that side 3a of the bead 3 which faces the upper can edge 8, a membrane foil 5 which may have a tear-open tab known per se and not shown 1s sealed on 2 in a manner known per se. According to the invention, however, the membrane foil is at least partly sealed to the top of the bead, preferably both at the top of the bead and to the adjacent, linear part of the inner wall of the can.
According to a second embodiment as shown in Fig. 2, the can body 1 is provided with a triangular bead 3, the edges or transitions of which to the can casing are, however, preferably rounded. A membrane foil 5 is sealed 2 to that section 3a of the bead 3 which points towards the upper can edge 8. Because this section is oblique, the internal force acting on the membrane foil and originating from the can pressure acts only 5 partly as a peeling force. Thus, the metal foil 5 can offer a relatively large resistance to unintentional and undesired peeling off. The «can casing 1 can moreover be closed with a lid 7 which is held in an interlocking manner at the upper can edge 8 by virtue of the fact that it grips over the can edge 8 and at least partly engages the bead 3, preferably with an edge bead 6.
In the case of beads according to the embodiments of
Figures 3a and 3b, the peeling force acting on the sealed membrane as a result of the internal pressure of the can is even smaller than in the case of bead shapes according to Fig. 1 and Fig. 2, so that the resistance to peeling off of the membrane is even greater.
In addition, the embodiment according to Fig. 3b having an oblique bottom 3b of the bead 3 permits residue-free complete emptying of the can content. The curvature of the bead between the horizontal, linear top 3a - in the case of an upright can - and the oblique bottom 3b may be either angular or rounded. It is also possible for the oblique bottom 3b to be either linear or curved, the angle relative to the horizontal, linear part 3a of the bead 3 - in the case of an upright can - being of minor importance and in any case any deviation of the bottom 3b from a horizontal path facilitating complete emptying of the «can. The bead according to the invention may have, for example, an internal (axial)
-200%708348 height of 50%, optionally about 100 to 150%, of its radial depth. However, it may also have a smaller internal height, in particular in the case of a horizontal top 3a of the bead 3 - in the case of an upright can - according to Figures 3 and 3b.
According to the invention, it is also ensured that the resistance which the connection has to offer to the peeling force is increased without it being necessary to apply a greater force for tearing open. Thus, an optimum for the solution of the two, partly contradictory technical requirements is provided.
According to the invention, the formation and use of a second bead, which is otherwise required in the case of cans of this type, 1s moreover superfluous. As a result, the quantitative change of the reduction of the number of beads becomes a qualitative measure: utilization of the single bead for achieving two different objects.
It is understandable that the measures according to the invention not only provide a simple and economical solution but also contribute to the elimination of tolerance problems and moreover make use of complicated tools superfluous.
Claims (13)
1. Can comprising can casing, a can edge and a membrane seal, which can has in the can casing in the vicinity of the can edge, a continuous, inward-facing bead, which bead having a top facing the can edge and a bottom, characterized in that a sealing membrane is connected with a seal to the top of the bead and to a part of the can casing which is adjacent to the top of the bead, the top and the bottom of the bead running uniformly or alternately either horizontally or obliquely inwards.
2. Can according to Claim 1, additionally comprising a lid.
3. Can according to Claim 1 or 2, characterized in that the bead is present at a distance of 1 to 10 mm from the can edge.
4. Can according to any of Claims 1 to 3, characterized in that the bead has an approximately semicircular or triangular cross-section.
5. Can according to any of Claims 1 to 3, characterized in that the bead has a horizontal top - in the case of an upright can - and an oblique bottom.
6. Can according to Claim 5 wherein the bottom is curved.
7. Can according to any of Claims 1 to 6, characterized in that the bevel is about 45°.
8. Can according to any of Claims 1 to 7, characterized in that the sealing membrane is connected to the bead and to the adjacent part of the can casing with a seal by adhesive bonding or heat sealing. AMENDED SHEET DATED 22 DECEMBER 2006
9. Can according to any of Claims 1 to 8, characterized in that the sealing membrane is a membrane foil.
10. Can according to Claim 9, characterized in that the membrane foil is a tear-open foil.
11. Can according to Claim 9 or 10, characterized in that the membrane foil consists of paper or aluminium.
12. Can according to any of Claims 2 to 11, comprising a can lid gripping over the can edge, characterized in that the can lid at least partly engages the bead by means of an edge bead.
13. Can substantially as herein described with reference to any one of the illustrated embodiments. AMENDED SHEET DATED 22 DECEMBER 2006
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03005985 | 2003-03-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA200508349B true ZA200508349B (en) | 2007-03-28 |
Family
ID=33016828
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA200508349A ZA200508349B (en) | 2003-03-18 | 2004-03-12 | Can comprising a foil seal |
Country Status (8)
Country | Link |
---|---|
US (1) | US20090014448A1 (en) |
EP (1) | EP1608564B1 (en) |
CN (1) | CN100393589C (en) |
AT (1) | ATE495984T1 (en) |
DE (1) | DE502004012126D1 (en) |
NZ (1) | NZ543034A (en) |
WO (1) | WO2004083066A1 (en) |
ZA (1) | ZA200508349B (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AR052230A1 (en) * | 2004-11-12 | 2007-03-07 | Brasilata Embalagens Metalicas | CLOSURE PROVISION FOR A CAN |
AU2006219982B8 (en) * | 2005-03-01 | 2011-12-08 | Crown Packaging Technology, Inc | Can for packaging food |
EP1975076B1 (en) | 2007-03-27 | 2009-06-24 | Impress Verpackungen Erfstadt GmbH & Co. KG | Tin can and a method for manufacturing the same |
ATE490186T1 (en) | 2007-12-10 | 2010-12-15 | Leonhardt Gmbh & Co Kg Geb | CONTAINER WITH EASY-TO-OPEN CLOSURE |
EP2184237B1 (en) * | 2008-11-10 | 2013-02-27 | Crown Packaging Technology, Inc | A closure for a container and a method for forming the same |
WO2010102665A1 (en) * | 2009-03-11 | 2010-09-16 | Inventum Group B.V. | A container |
WO2012152608A1 (en) * | 2011-05-06 | 2012-11-15 | Crown Packaging Technology, Inc. | Peelback |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2044677A (en) * | 1935-03-29 | 1936-06-16 | Continental Can Co | Metal container |
GB532834A (en) | 1939-09-21 | 1941-01-31 | Benger S Food Ltd | Improvements in cartons, canisters and the like |
FR917018A (en) | 1945-11-06 | 1946-12-23 | Sarl De Ferblanterie Et De Tol | Airtight closing device for metal cans with a cover |
US3394861A (en) * | 1967-02-23 | 1968-07-30 | James R. Truax | Multiple compartment container |
CH480993A (en) * | 1967-09-05 | 1969-11-15 | Boxal Beaurepaire S A | Device for closing a box |
US3955006A (en) * | 1971-06-30 | 1976-05-04 | Burton H. Sokolsky | Method of packaging food using a liner |
CH564456A5 (en) * | 1973-05-10 | 1975-07-31 | Sandherr Max Ag | Can with guaranteed closure - has closing membrane with tear-off flap glued to inner wall surface opening |
CH643502A5 (en) | 1980-03-25 | 1984-06-15 | Alusuisse | METAL CAN WITH MEMBRANE CLOSURE. |
US4359169A (en) * | 1981-08-28 | 1982-11-16 | Container Corporation Of America | Container end closure arrangement |
US4401231A (en) * | 1982-05-28 | 1983-08-30 | Container Corporation Of America | Container closure sealing member and method of forming |
CH659633A5 (en) * | 1983-05-05 | 1987-02-13 | Hoffmann Ag Geb | Ready-to-install sealing unit for a container, a method for mounting a sealing unit on a container body and a container |
CH668754A5 (en) * | 1985-07-10 | 1989-01-31 | Grabher Indosa Maschbau Ag | METHOD FOR CLOSING A CAN-CONTAINER BY MEANS OF A MEMBRANE. |
US4940158A (en) * | 1987-09-22 | 1990-07-10 | American National Can Company | Container and seam ring for container |
US5913446A (en) * | 1994-06-21 | 1999-06-22 | Von Holdt, Sr.; John W. | Plastic bucket and lid |
DE4431758A1 (en) | 1994-09-06 | 1996-03-14 | Nestle Deutschland Ag | Tin can with foil closure |
-
2004
- 2004-03-12 AT AT04719960T patent/ATE495984T1/en active
- 2004-03-12 WO PCT/EP2004/002596 patent/WO2004083066A1/en active Application Filing
- 2004-03-12 DE DE502004012126T patent/DE502004012126D1/en not_active Expired - Lifetime
- 2004-03-12 US US10/552,661 patent/US20090014448A1/en not_active Abandoned
- 2004-03-12 ZA ZA200508349A patent/ZA200508349B/en unknown
- 2004-03-12 EP EP04719960A patent/EP1608564B1/en not_active Expired - Lifetime
- 2004-03-12 CN CNB2004800109437A patent/CN100393589C/en not_active Expired - Fee Related
- 2004-03-12 NZ NZ543034A patent/NZ543034A/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
US20090014448A1 (en) | 2009-01-15 |
NZ543034A (en) | 2010-04-30 |
WO2004083066A1 (en) | 2004-09-30 |
DE502004012126D1 (en) | 2011-03-03 |
CN1777546A (en) | 2006-05-24 |
CN100393589C (en) | 2008-06-11 |
EP1608564B1 (en) | 2011-01-19 |
ATE495984T1 (en) | 2011-02-15 |
EP1608564A1 (en) | 2005-12-28 |
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