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

Definitions

• the invention relates to a can with a membrane closure, in which a closure membrane is sealed on a bead that runs all the way around the head area of the can jacket, in order to effectively counteract the peeling forces on the contact surface of the membrane with the can jacket in the event of an overpressure occurring inside the can to act.
• Cans can be closed again by means of a closure after opening, others, in particular disposable cans, are emptied after opening and, depending on the material from which they were made, disposed of as waste.
• Cans are usually made of cardboard, plastic or a thin sheet material.
• a membrane film usually made of paper or aluminum, is often used as the sealing material for cans.
• a membrane film in the form of a plate closing the can opening with a projecting collar is often sealed to the inside wall of the can by means of this collar in the region of the can opening.
• EP 0 700 838 discloses a can with a conical can shell that opens slightly upwards in the head area and to which a sealing membrane is sealed on the inside.
• EP 0 700 838 The aim of EP 0 700 838 is to replace conventional sheet metal lids on the one hand and on the other hand by a purely vertical sealing of the membrane to the inner wall of the can and the associated technical difficulties when using U-shaped preformed membranes in connection with tolerance-related fluctuations in the diameter of the cans.
• FR 917 018 ensure a fixed position for the membrane plate and uses a bead as a stop for the membrane collar when sealing.
• GB 532 834 in turn wants to close a can with a membrane disc. The can rim rolled inwards holds the disc rim resting on the horizontal bead part.
• an additional bead is provided which serves to ensure that the can lid in its closed position is securely held on the can body, which is even more complex to manufacture and requires even more material.
• This additional material outlay may appear slight for a single can, but it is significant for bulk items such as such cans. In view of the strong competition that is active in this area, every little extra effort is a disadvantage, which should be avoided if possible.
• the invention has therefore set itself the goal of addressing the disadvantages of the known prior art in the case of cans with membrane closures remove.
• the object is achieved above all by providing a can which, in the head region, just below the edge of the can, preferably at a distance of 1 to a maximum of 10 mm below the edge of the can, has an inward beading extending over the entire circumference of the can, a sealing membrane is sealed on the top.
• top side is to be understood as the side of the bead facing the can edge.
• underside of the bead is the side of the bead facing the inside of the can.
• the bead according to the invention has a sufficient axial extent and can optionally be produced in a known manner by rolling in a single operation. In addition, it can hardly spring when the sealing membrane, for example a membrane film, is sealed. As a result, the connection of the membrane film closing the can to the can jacket is made more stable and the tearing of the membrane film is nevertheless not made more difficult.
• the can is also easy to empty almost completely and the weakening of the can jacket remains minimal. By arranging the bead directly or just below the edge of the can, the inner volume of the can is fully utilized up to the upper limit of the possibility.
• the present invention relates to a can with a
• Membrane closure which in the area of the can opening, preferably at a distance of 1 to 10 mm from the edge of the can, has a bead in the can jacket which runs around the entire circumference of the can and which is sealingly connected to a sealing membrane, for example a membrane film, in particular a tear-open film, and the upper part facing the can opening or the edge of the can and the lower part of the bead facing the inside of the can - viewed when the can is set up vertically - run equally or alternately either horizontally or diagonally inwards.
• a sealing membrane for example a membrane film, in particular a tear-open film
• any combination of horizontal and / or sloping bead upper and lower part is within the scope of the present invention.
• the tight bond between the sealing membrane and the box surround can be achieved by suitable measures such as gluing or heat sealing.
• the possibility is created of sealing the membrane film, which can preferably be made of paper or aluminum, with the oblique or horizontal top of the bead either with the help of adhesive applied to this part - either fresh or after it has cooled afterwards by heat to connect, or to seal with the help of a heat seal layer applied on the film.
• This also ensures better retention of the membrane film against inadvertent removal (peeling) of the film from the bead from the inside, because only part of the upward, internal force is effective in the direction of lifting off the adhesive surface.
• Fig. 1 shows a first embodiment with a fastening of the membrane film on a semicircular bead, and on the vertical part of the
• FIG. 2 shows a second embodiment with a fastening of the membrane film without a collar to a triangular bead which is arranged directly below the upper edge of the can;
• 3a and 3b further embodiments of the bead according to the invention.
• a can jacket 1 shown in FIG. 1 has a flange 4 on its upper edge 8 of the can. Somewhat below the upper can edge 8, ie preferably at a distance of 1 to 10 mm from the can edge, an inwardly facing, semicircular bead 3 is formed. On the for Upper can edge 8 facing side 3a of the bead 3 is sealed in a manner known per se 2, a membrane film 5, which may have a tear tab, not shown, which is known per se. According to the invention, however, the membrane film is at least partially sealed to the top of the bead, preferably both on the top of the bead and on the rectilinear part of the inner wall of the can adjoining it.
• the can body 1 is provided with a triangular bead 3, the edges or transitions in the can jacket, however, are preferably rounded.
• a membrane film 5 is sealed to the section 3a of the bead 3 pointing in the direction of the upper can edge 8. Because this section runs obliquely, the internal force acting on the membrane film 5 and originating from the can pressure is only partially effective as a peeling force. Thus, the metal foil 5 can offer greater resistance to unwanted and undesired detachment.
• the can jacket 1 can also be closed with a lid 7 which is held in a form-fitting manner on the upper can edge 8 by overlapping the can edge 8 and preferably engaging at least partially with a bead 6 in the bead 3.
• the peeling force which acts on the sealed membrane as a result of an internal pressure in the can is even lower than in the case of bead shapes according to FIGS. 1 and 2, so that the resistance to detachment of the membrane is even stronger.
• the embodiment according to FIG. 3b with a sloping underside 3b of the bead 3 permits residue-free, complete emptying of the can contents.
• the curvature of the corrugation between the straight upper part 3a which runs horizontally when the can is set up and the oblique lower part 3b can be both angular and rounded.
• the inclined lower part 3b can be both rectilinear and curved, the angle with respect to the horizontal, rectilinear upper part 3a of the bead 3, when the can is set up, being of subordinate importance and, in any case, any deviation of the lower part 3b from a horizontal course is complete emptying the can relieved.
• the bead according to the invention can, for example, have a clear (axial) height of 50%, possibly about 1 00 to 1 50% of its radial depth. But it can also be one have a lower clear height, in particular in the case of a top 3a of the bead 3, which runs horizontally when the can is set up, according to FIGS. 3a and 3b.

Priority Applications (1)

Applications Claiming Priority (4)

Publications (2)

Family

ID=33016828

Family Applications (1)

Country Status (8)

Families Citing this family (7)

Family Cites Families (15)

• 2004
  • 2004-03-12 US US10/552,661 patent/US20090014448A1/en not_active Abandoned
  • 2004-03-12 CN CNB2004800109437A patent/CN100393589C/zh not_active Expired - Fee Related
  • 2004-03-12 WO PCT/EP2004/002596 patent/WO2004083066A1/fr active Application Filing
  • 2004-03-12 EP EP04719960A patent/EP1608564B1/fr not_active Expired - Lifetime
  • 2004-03-12 NZ NZ543034A patent/NZ543034A/en not_active IP Right Cessation
  • 2004-03-12 AT AT04719960T patent/ATE495984T1/de active
  • 2004-03-12 ZA ZA200508349A patent/ZA200508349B/en unknown
  • 2004-03-12 DE DE502004012126T patent/DE502004012126D1/de not_active Expired - Lifetime

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events