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
  • B65D43/00—Lids or covers for rigid or semi-rigid containers
  • B65D43/02—Removable lids or covers
  • B65D43/0202—Removable lids or covers without integral tamper element
  • B65D43/0214—Removable lids or covers without integral tamper element secured only by friction or gravity
  • B65D43/022—Removable lids or covers without integral tamper element secured only by friction or gravity only on the inside, or a part turned to the inside, of the mouth of 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
  • 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
• • 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
  • B65D43/00—Lids or covers for rigid or semi-rigid containers
  • B65D43/02—Removable lids or covers
  • B65D43/0235—Removable lids or covers with integral tamper element
• • 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
  • B65D43/00—Lids or covers for rigid or semi-rigid containers
  • B65D43/02—Removable lids or covers
  • B65D43/0235—Removable lids or covers with integral tamper element
  • B65D43/0237—Removable lids or covers with integral tamper element secured by snapping over beads or projections before removal of the tamper element
• • 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
  • B65D79/00—Kinds or details of packages, not otherwise provided for
  • B65D79/005—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting
• • 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
  • B65D2543/00—Lids or covers essentially for box-like containers
  • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
  • B65D2543/00018—Overall construction of the lid
  • B65D2543/00064—Shape of the outer periphery
  • B65D2543/00074—Shape of the outer periphery curved
  • B65D2543/00092—Shape of the outer periphery curved circular
• • 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
  • B65D2543/00—Lids or covers essentially for box-like containers
  • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
  • B65D2543/00018—Overall construction of the lid
  • B65D2543/00259—Materials used
  • B65D2543/00277—Metal
• • 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
  • B65D2543/00—Lids or covers essentially for box-like containers
  • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
  • B65D2543/00342—Central part of the lid
  • B65D2543/0037—Flexible or deformable
• • 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
  • B65D2543/00—Lids or covers essentially for box-like containers
  • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
  • B65D2543/00444—Contact between the container and the lid
  • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
  • B65D2543/0049—Contact between the container and the lid on the inside or the outside of the container on the inside, or a part turned to the inside of the mouth of the container
  • B65D2543/00509—Cup
• • 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
  • B65D2543/00—Lids or covers essentially for box-like containers
  • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
  • B65D2543/00444—Contact between the container and the lid
  • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
  • B65D2543/00537—Contact between the container and the lid on the inside or the outside of the container on the outside, or a part turned to the outside of the mouth of the container
  • B65D2543/00546—NO contact
• • 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
  • B65D2543/00—Lids or covers essentially for box-like containers
  • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
  • B65D2543/00444—Contact between the container and the lid
  • B65D2543/00583—Means for limiting the axial insertion of the lid on 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
  • B65D2543/00—Lids or covers essentially for box-like containers
  • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
  • B65D2543/00953—Sealing means
  • B65D2543/00962—Sealing means inserted
  • B65D2543/00972—Collars or rings

Definitions

• the present invention relates to metal food cans with reclosable lids. More particularly the invention relates to metal food cans suitable for containing food products and which, once filled, provide a vacuum seal between the can body and the can lid.
• a closure system is often used that has a peelable foil lid sealed to the upper surface of a bead pressed into the can body adjacent to the opening. Once the lid is peeled off it is of course not possible to tightly reclose the can with that foil lid.
• a plastic overcap is typically provided and which is press-fitted over the can body opening above the foil lid. The plastic overcap also provides protection for the relatively weak foil lid during transit and storage. As it is desirable to allow customers to see the foil and verify its integrity prior to purchase, the plastic overcap is often fully or at least partially transparent.
• Embodiments of the present invention provide a metal food can that provides an air and liquid tight seal combined with a means for allowing consumers to verify the integrity of the seal prior to first opening, whilst avoiding the need for a plastics overcap.
• a can comprising a metal can body having an edge defining a top opening into the body, the body further comprising an inwardly directed bead extending around the body adjacent to said top opening, the bead defining an upwardly facing sealing surface and an inwardly facing surface.
• the can further comprises a metal lid having a centre panel, a wall surrounding said centre panel, an outwardly directed curl at the top of said wall, the curl defining a peripherally extending channel having an opening therein, and sealing compound located within said channel and projecting through said opening.
• the can body and the lid are dimensioned to allow the lid to be press-fitted into the can body so that an outwardly facing surface of said wall opposes the inwardly facing sealing surface of said bead, whilst said sealing compound is in sealing engagement with said upwardly facing sealing surface of the bead.
• the can body may be a single piece can body and said inwardly directed bead is pressed into the can body.
• the can body may comprise an annular can end component fixed to a can body wall, said component defining the inwardly directed bead.
• the can may further comprise an end closing a bottom of said can body, the lid being engaged with the can body and the can body containing a product, a partial vacuum being present within the can in order to pull the lid onto the can body, thereby compressing said sealing compound between the lid and the can body and effecting a substantially air tight seal between the lid and the can body.
• the centre panel may define a pop-up button within a central region thereof, such that the button is depressed when the lid is engaged with the can body and a partial vacuum is present within the can and is in a raised position when the partial vacuum is released.
• the can body and the lid may be dimensioned to provide a gap of at least 1 mm between an outermost edge of said curl and an inner surface of said top opening.
• a gap between the upwardly facing sealing surface of the bead and a top of the edge may be approximately 3mm.
• the can body may comprise a sheet of metal rolled into a cylinder with a welded seam joining the opposed edges of the sheet.
• the can body may comprise a base secured to the can body to close a bottom opening of the can body.
• the edge of the can body may be a curled edge.
• the radially outermost region of the inwardly directed bead may be collapsed in an axial direction to substantially close the bead to an area surrounding the can body.
• the inwardly directed bead may have a substantially oval axial cross-sectional shape.
• the upwardly facing sealing surface and the inwardly facing surface defined by the bead may be substantially convex.
• the outwardly facing surface of the lid wall may be substantially flat.
• the can body and the lid may be dimensioned such that, when the lid is press-fitted into the opening of the can body, an upper surface of the lid is below the top of the can body.
• the outwardly facing surface of the wall may abut the inwardly facing sealing surface of the bead, providing a metal to metal seal.
• the sealing compound When the lid is engaged with the can body, the sealing compound may extend over the outwardly facing surface of the wall to seal said outwardly facing surface to the inwardly facing sealing surface of the bead.
• Figure 1 is a perspective view of a can according to the present invention.
• Figure 2a is a close-up view of the can of Figure 1 , illustrating a can lid;
• Figures 2b and 2c are cross-sectional views of the lid of Figure 2a showing a pop-up button;
• Figure 3 is a cross-sectional view of a portion of the can of Figure 1 ; and Figure 4 is a perspective view of the can of Figure 1 , illustrating removal of the lid.
• Figures 1 to 4 illustrate a can 10 (for example, a food can or “tin”) comprising a metal can body 20 and a metal lid 30.
• the can body 20 has an upper curled edge 21 , or rim, defining a top opening into the body 20, and comprises an inwardly directed bead 22 extending circumferentially around the body 20 adjacent to the top opening.
• the top of the bead 22 is spaced approximately 3mm from the top of the edge 21 .
• the inwardly directed bead 22 defines a substantially upwardly facing sealing surface 25 and an inwardly facing sealing surface 26.
• the metal lid 30 has a centre panel 31 , a wall 32 surrounding the centre panel 31 and an outwardly directed curl 34 at the top of the wall 32.
• the curl 34 defines a circumferentially extending channel 35 having an opening 37 therein. Sealing compound such as plastisol 36 is located within the channel 35 and projects through the opening 37.
• the inwardly directed bead 22 may be pressed into the body 20, such that the body 20, including the bead 22, is formed from a single, homogeneous piece of metal, as best illustrated in Figure 3.
• a separate annular can end component i.e. a ring
• the ring may be non-removably seamed around the top opening of the can body.
• the ring may be made by stamping out a blank from a flat sheet and subsequently forming the blank to have an appropriate cross-sectional shape, defining an annular space or gap between the inner and outer edges of the ring.
• the ring may be further formed at its innermost region to provide a substantially circular, upwardly facing sealing surface and an inwardly facing sealing surface.
• the can body 20 and the lid 30 are dimensioned to allow the lid 30 to be press-fitted into the can body 20, so that an outwardly facing surface 38 of the lid wall 32 abuts the inwardly facing sealing surface 26 of the bead 22, and the sealing compound 36 is in sealing engagement with the upwardly facing sealing surface 25 of the bead 22.
• the can body 20 comprises a base 40 secured to the can body 20 to close a bottom opening of the can body 20.
• the base 40 may, for example, be secured to the can body 20 by seaming.
• the can body 20 is generally cylindrical in shape, and is formed from a sheet of metal rolled into a cylinder. Opposed edges of the metal sheet are joined together via a welded seam (not shown here).
• the can body 20, lid 30 and base 40 may be formed from steel, tinplate, aluminium, or other suitable metal or metal alloy.
• a single material is used for all three elements of the can 10 such that the can 10 is more easily recyclable.
• FIG. 2a illustrates the can lid 30 in more detail.
• the centre panel 31 of the lid 30 defines a circular, bi-stable pop-up button 33 within a central region thereof.
• the button 33 may comprise an outer, inclined wall 33a circumferentially surrounding a substantially flat panel 33b, in the centre of which is an inner circular region 33c.
• the inner circular region 33c is configured to be moveable between a position in which it is slightly raised above the flat panel 33b (as shown in Figure 2b), and a position in which it is substantially level with the flat panel 33b (Figure 2c).
• the button 33 may have a height above the centre panel 31 of approximately 1 mm when in a raised position, as shown in Figure 2a. In one non-limiting example, where the centre panel 31 has a diameter of approximately 75 mm, the button 33 may have a diameter of approximately 34 mm.
• an upper surface of the pop-up button 33 (i.e. the flat panel 33b and the inner circular region 33c) may be substantially level with the centre panel 31.
• the pop-up button 33 moves to a raised position ( Figure 2b).
• an upper surface of the pop-up button 33 comprising at least the inner circular region 33c, is above a level of the centre panel 31 but is easily depressed by a user.
• the pop-up button 33 thereby provides a tactile and visual indication that the partial vacuum has been released (i.e. tamper evidence).
• the can lid 30 when a partial vacuum is present within the can 10, the can lid 30 is pulled onto the can body 20. This acts to compress the sealing compound 36 that is positioned between the lid 30 and the can body 20, providing a substantially air tight seal between the lid 30 and the can body 20.
• the sealing compound 36 is preferably foamed to improve compressibility and provide an effective vacuum seal between container body 20 and lid 30.
• the top of the lid curl 34 is below the curled edge 21 (i.e. the rim) that defines the top opening of the can body 20.
• This arrangement may assist in protecting the vacuum seal, e.g. preventing accidental knocking of the lid during transport.
• Figure 3 also illustrates the engagement of the lid 30 with the can body 20.
• the sealing compound 36 is located partially within the channel 35 defined by the outwardly directed curl 34 in which the lid wall 32 terminates.
• the curl 34 is open to the extent that the channel 35 has an opening 37 substantially facing the bead 22 of the can body 20.
• the compound 36 substantially fills the channel 35 and also projects through the channel opening 37, such that it extends down a portion of the lid wall 32.
• An outer surface of the lid wall 32 forms an outwardly facing sealing surface 38 which engages with the bead 22.
• the sealing surface 38 formed by the lid wall 32 may be substantially flat. In this example, the lid sealing surface 38 directly contacts the bead 22 to provide a metal-to-metal configuration.
• the sealing compound may extend further down the lid wall 32 such that lid sealing surface 38 does not directly contact the bead; instead the compound 36 forms a seal between the lid sealing surface 38 and the bead 22.
• the bead 22 may be “crushed”, i.e. the radially outermost region 24 of the bead 22 may be collapsed in an axial direction. This substantially closes the bead 22 to an area surrounding the can body 20, thus preventing dirt and/or other objects from entering the bead’s interior.
• the upper end of the can body 20 may terminate in a closed curl 23 which forms the curled edge 21 , which prevents ingress of dirt and avoids sharp edges on the can 10.
• the bead 22 may be left open to a greater or lesser extent.
• the bead 22 has a substantially oval axial cross-sectional shape.
• the bead 22 may be substantially symmetrical about a longitudinal axis A.
• the upwardly facing sealing surface 25, defined by the bead 22 is substantially convex (i.e. outwardly curved).
• the inwardly facing sealing surface 26 defined by the bead 22 is substantially convex in shape.
• the lid 30 is provided with a layer of sealing compound 36 within the channel 35 and is then press-fitted onto the can body 20.
• the sealing compound 36 protrudes through the channel opening 37 such that the sealing compound 36 forms a seal against the upwardly facing sealing surface 25 of the can body bead 22, and such that the lid sealing surface 38 engages with the inwardly facing surface 26 of the can body bead 22.
• the partial vacuum formed within the can body 20 holds the lid 30 onto the can body 20, such that the sealing compound 36 is compressed against the bead 22.
• This partial vacuum may be formed during filling, e.g. by steam flushing or vacuum seaming, or may result from a cooling of a hot filled product.
• the seal between the layer of sealing compound 36 provided on an underside of the lid rim, and the bead 22 of the metal can body 20, ensures that the partial vacuum within the can body 20 is securely maintained, even where the can is dropped or knocked.
• a metal-to- metal seal alone may be insufficient to maintain the vacuum whereas sealing using a compound allows the discontinuity resulting from the weld to be effectively smoothed- out.
• the can body and the lid are dimensioned to provide a gap
• this gap 27 may be between 2 to 3 mm wide. This gap is sufficient to allow the lid to be removed with a suitable lever. This is illustrated in Figure 4 where, in order to remove the lid 30 and open the can 10, the end of a spoon 50 is inserted into the gap 27. It will be appreciated that the lid 30 may be subsequently pushed back on to re-close the can body 20. In this case, a seal is re-formed between the compound and the bead (although clearly the vacuum seal cannot be re-formed). This is particularly useful for products which deteriorate on exposure to air.
• the above-described can essentially provides a single material packaging solution for products, such as food products which previously may have required the use of a peelable foil lid and an overcap.
• the use of plastics is therefore avoided apart from a small amount of sealing compound.
• the metal lid may be beneficially printed or otherwise marked with indicia, or the like.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Ceramic Engineering (AREA)
• Closures For Containers (AREA)
• Rigid Containers With Two Or More Constituent Elements (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=69186892

Family Applications (1)

Country Status (6)

Cited By (1)

Citations (4)

Family Cites Families (6)

• 2019
  • 2019-12-12 GB GB1918331.8A patent/GB2589911B/en active Active
• 2020
  • 2020-12-08 EP EP20821190.4A patent/EP4072965A1/en active Pending
  • 2020-12-08 US US17/783,741 patent/US20230011029A1/en active Pending
  • 2020-12-08 WO PCT/EP2020/085041 patent/WO2021116089A1/en unknown
  • 2020-12-08 MX MX2022007038A patent/MX2022007038A/es unknown
  • 2020-12-08 BR BR112022010557A patent/BR112022010557A2/pt unknown

Patent Citations (4)

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