EP2578511A1 - Système de récipient refermable destiné au stockage de la peinture - Google Patents

Système de récipient refermable destiné au stockage de la peinture Download PDF

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Publication number
EP2578511A1
EP2578511A1 EP12175619.1A EP12175619A EP2578511A1 EP 2578511 A1 EP2578511 A1 EP 2578511A1 EP 12175619 A EP12175619 A EP 12175619A EP 2578511 A1 EP2578511 A1 EP 2578511A1
Authority
EP
European Patent Office
Prior art keywords
lid
container
rim
lever
sealing
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.)
Granted
Application number
EP12175619.1A
Other languages
German (de)
English (en)
Other versions
EP2578511B1 (fr
Inventor
Antonio Pinto
José Arieiro
Luis BARBOSA
Manuel Sousa
Màrio Vaz
Renato Alves
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.)
Colep Portugal SA
Original Assignee
ColepCCL Portugal Embalagens e Enchimentos SA
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 ColepCCL Portugal Embalagens e Enchimentos SA filed Critical ColepCCL Portugal Embalagens e Enchimentos SA
Publication of EP2578511A1 publication Critical patent/EP2578511A1/fr
Application granted granted Critical
Publication of EP2578511B1 publication Critical patent/EP2578511B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • B65D43/0204—Removable lids or covers without integral tamper element secured by snapping over beads or projections
    • B65D43/0208—Removable lids or covers without integral tamper element secured by snapping over beads or projections on both the inside and the outside of the mouth of the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67B—APPLYING CLOSURE MEMBERS TO BOTTLES JARS, OR SIMILAR CONTAINERS; OPENING CLOSED CONTAINERS
    • B67B7/00—Hand- or power-operated devices for opening closed containers
    • B67B7/14—Hand- or power-operated devices for opening closed containers for removing tightly-fitting lids or covers, e.g. of shoe-polish tins, by gripping and rotating
    • 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
    • B65D2543/00444—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
    • 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
    • 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
    • B65D2543/00555—Contact between the container and the lid on the inside or the outside of the container on both the inside and the outside
    • 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
    • B65D2543/00592—Snapping means
    • B65D2543/00601—Snapping means on the container
    • B65D2543/00611—Profiles
    • B65D2543/00638—Rolled edge
    • 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
    • B65D2543/00592—Snapping means
    • B65D2543/00712—Snapping means on the lid
    • B65D2543/00722—Profiles
    • B65D2543/0075—Rolled edge
    • 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
    • B65D2543/00824—Means for facilitating removing of the closure
    • B65D2543/00888—Means for facilitating removing of the closure by applying lever forces
    • B65D2543/00898—Means for facilitating removing of the closure by applying lever forces by means of a coin or other tool in recesses or similar on container or lid

Definitions

  • one of these known container systems incorporates a metal container, which is substantially cylindrical, and is formed of sheet metal.
  • the cylindrical side wall of the container is formed from a suitably bent piece of sheet metal (e.g. steel or plated steel), and the cylindrical wall is formed from the sheet by making a longitudinal seal using techniques well known in the art (e.g. by appropriate folding, curling, or bending of the sheet edges).
  • These containers are commonly referred to in the art as metal pails, and the bottom end of the container is closed by another piece of sheet metal. Again, well known folding, curling, or bending techniques are used to form a seal between the generally circular piece of sheet metal forming the bottom of the container and the lower end of the container walls.
  • the side walls it is known with these metal pails for the side walls to incorporate one or more radially extending ridges formed by appropriate deformation of the side wall material.
  • the metal side wall of the pail is curled over at its upper edge, radially outwards, to form a container rim.
  • a generally circular sheet metal lid is then used to close and seal the container by fitting on and forming a seal to the container rim.
  • This first type of container lid comprises a plurality of claws arranged around the periphery of the lid. Each of these claws is adapted to be bent so as to clip under the outwardly curved container rim.
  • each claw typically comprises a respective slot into which a tool, such as a screwdriver, can be inserted to lever the claw from its closed, sealing position, radially outwards and upwards so that the claw disengages from the respective portion of the container rim.
  • a tool such as a screwdriver
  • Fig. 1 shows such a system, with some of the claws clipped in place, some of the claws having been disengaged, and one claw being in the process of unclipping using a screwdriver.
  • Fig. 2 shows the lid with all claws opened, the lid being ready for removal from the pail.
  • the sheet metal used to form the lid incorporates a large number of potentially sharp edges because of the detail required to define the large number of claws and their associated apertures. Each of these edges thus poses a cutting hazard to a user. Furthermore, the large number of cut edges increase the potential for the lid to rust, if it is formed from ferrous material. Although the lid may be sprayed, coated, painted, or otherwise covered with a rust-inhibiting material, the larger the number of edges, and the greater the total length of the combined edges of the lid, the greater the chance of the rust-inhibiting treatment failing to be completely successful.
  • Another problem is that typically, once the lid has been removed from the pail, it cannot be used to re-seal the pail. Bending of the claws to release the lid typically causes a degree of permanent distortion of the lid, and prevents it from being able to properly reseal the pail. Even if the lid is not substantially distorted when first removing it, it is very difficult for a user to try to reseal the lid to the container by bending back, into their clipping positions, each of the large number of claws. This operation typically requires a degree of strength, and the container system is typically never airtight again. Thus, although this closure system is common in the professional paint market, for closing paint pails, it has numerous drawbacks.
  • the lid In view of the fact that these known container systems utilise lids with claws which, after removal from the pail cannot be resealed, it is known for the lid to have a circular aperture provided in its central portion, and for the system to further comprise a second lid adapted to seal this aperture.
  • the aperture typically has a rim formed by suitable curling of the sheet metal material, and the second lid is suitably arranged so that it can be push-fitted into the aperture and seal it.
  • the container system can be used to contain a large quantity of paint of a certain colour, e.g. a base colour such as white.
  • Another known container system that is resealable comprises a relatively more simple lid for fitting onto the outwardly curled rim of a metal pail.
  • a ring assembly which incorporates a latch or lever.
  • the lever is rotated to an open position to expand the ring. In this expanded position the ring is fitted over the loosely assembled lid edge and container rim. Then, the lever is closed to contract the diameter of the ring and so clamp together and seal the lid and container.
  • the lever is attached to the split ring component by suitable means, such as a cam arrangement, so that when the latch is in its closed position it cannot spring open.
  • the latch To remove the lid the latch has to be rotated to its open position, again expanding the split ring.
  • the ring assembly, incorporating the latch is relatively expensive to make, and represents an increase in complexity (it is an assembly in addition to the lid and container).
  • the fitting of the ring and latch assembly to the lid and container body is difficult to automate, and if it requires manual input it results in increased costs.
  • GB488,243 An example of another known resealable container system for syrup, paint, or the like material, is disclosed in GB488,243 .
  • This document discloses a can configuration which is familiar to consumers of syrup, and to consumers buying paint tins from do-it-yourself suppliers.
  • the container body Rather than the lid fitting onto a rib formed at the upper end of a metal side wall of the can, the container body has a more complicated construction.
  • a ring of material which can also be described as an annular flange, is attached to the top end of the container side wall by suitable means, and that ring or flange itself has a central circular aperture into which a pressed steel lid can be inserted to seal the can.
  • the lid is thus able to form a releasable seal between itself and the annular flange.
  • the lid simply has to be pushed into place.
  • a tool such as a screwdriver, can be inserted under the lip of the lid, and to pivot on the edge of the container body forming the seal between the container side wall and the annular flange. The tool can then be rotated to lever off the lid.
  • annular flange attached to the metal side walls and defining the aperture or mouth which is sealed by the lid, represents increased complexity compared with the metal pail arrangements in which the pail mouth is defined by a rim simply formed by curling over an upper edge portion of the metal side wall.
  • the material cut out to form the circular aperture in the ring or annular flange is wasted.
  • the ring or flange inhibits a user from being able to completely empty the can; when the can is tilted to pour out the contents the ring or flange tends to retain some material inside it.
  • a pressure closing system such as a lid adapted for press-fitting inside the mouth.
  • the lid closes the mouth/aperture in the ring; the lid does not close directly on the body side wall.
  • GB400,008 discloses another known resealable container system.
  • the disclosed container system utilises a container having a metal side wall, an upper end portion of which is curled over to define an outwardly projecting container rim. Close to that rim, the side wall of the container is deformed to provide a radially extending ridge or rib.
  • a lid is adapted to fit onto the container and form a releasable seal.
  • the lid comprises a portion which curls around the container rim, and then an edge portion of the lid is curled over outwardly to form a rim. This rim is arranged such that when the lid is closed, the rim is close to the ridge on the container wall.
  • a tool is inserted in the space between the side wall rib and the lid rim from below, and is levered, pivoting on the radially outermost part of the rib, and so pushing the container rim radially outwards.
  • a problem with this system is that the container side wall can be damaged by the levering action used to disengage the lid.
  • the ridge provided by a kink in the side wall of the container results in the container being susceptible to deformation when the lid is pressed down onto it from above. Under a compressive axial force, the kink is liable to bend further, and this can close the gap between the container rib and the lid rim, inhibiting use of a screwdriver to open the system.
  • Certain embodiments aim to provide a releasable container system for storing paint having relatively simple construction, which forms a good air-tight seal, and which can be repeatedly opened and closed, forming a good seal on each closure, without damaging or distorting the lid and/or container.
  • Certain embodiments are therefore reusable over a long period of time, and can be re-filled a large number of times, for example.
  • a resealable container system for storing paint comprising:
  • the hook portion hooks under and engages the portion of the lid rim from a position radially outside the lid rim.
  • the lever portion or arm is arranged such that when in the opening position the arm pivots on an external surface of the lid outer portion and extends from that pivot point in a direction radially outwards to a position radially outside the lid rim. Then, the hook portion extends radially inwards from that position to hook under and engage the portion of the lid rim.
  • the hook portion is arranged to engage, when the opening tool is in the opening position, a lower inner quadrant of the lid rim cross section.
  • levering of the lid rim using the opening tool in this way will distort/flex the outer wall portion and the connected sealing portion and so will also break the seal between the lid and container body.
  • the levering of the lid in this way with the opening tool produces a slight flexing of the lid and its subsequent removal can be regarded as involving a limited peeling off action.
  • the limited flexing of the lid caused by the levering action and subsequent removal from the container does not permanently distort or damage the lid.
  • this system provides numerous advantages. For example, no special tools are required to reseal the lid onto the container body. Instead, to seal the lid on the container body it simply has to be pressed down so that the lid rim is first of all displaced slightly radially outwards as it is forced over the container rim and then the lid rim springs back, radially inwardly, to engage and grip a lower surface of the container rim after it has passed over the radially outermost points of the container rib.
  • This fitting or sealing of the lid to the container body can easily be automated in a factory, simply requiring a downward force to be applied over the entire lid sealing portion, for example by pushing down on a plate covering the lid.
  • the lid can easily be resealed on the container body by a subsequent user by pressing down on the entire lid sealing means simultaneously, or by pressing down on one point to clip the lid rim into place at that point, and then working around the lid circumference until the lid rim grips around the entire container rim.
  • the lid can have no sharp edges. This helps avoid injury to a user, and also inhibits the formation of rust, in embodiments where the metal of the lid is a ferrous metal and the lid is painted or coated with some rust-inhibiting substance.
  • the lid can be removed from the container body using the opening tool without permanently distorting or damaging the lid.
  • this external surface will be supported by the underlying container rim, and hence is rigid and resistant to distortion. This is in contrast to prior art techniques in which tools to lever off a lid were applied between an edge of the lid and a side wall of the container, resulting in distortion.
  • the receivable container system of this first aspect of the invention avoids the disadvantages associated with the prior art system incorporating a plurality of claws, and also avoids the disadvantages associated with the ring and latch type prior art. Furthermore, the container system of this first aspect of the present invention is able to employ relatively simple container bodies, having metal side walls with simple out turned upper edge portions forming container rims. Thus, the disadvantages associated with syrup cans and DIY paint cans with ring members attached to their side walls are avoided.
  • the resealable container system enables the lid to be repeatedly sealed to the container, removed, and then resealed, it provides access to the container body, which may have relatively simple construction, and so avoids the need for a lid-within-lid structure.
  • the metal side wall is formed from sheet metal.
  • the metal side wall may be formed from a wide variety of materials.
  • the metal side wall may be formed from sheet steel, tin-plated steel, a non-ferrous metal, such as aluminium, or any other suitable rigid metal according to the intended use of the container system.
  • the metal side wall may be coated, painted, or otherwise covered with some other material, such as a non-metallic paint, for example.
  • a covering or coating may be applied to inhibit the formation of rust.
  • appropriate coverings or coatings may be applied to the metal side walls to prevent contamination of the contents, such as liquids, to be stored in the container by the wall material, or indeed to prevent any reaction between the stored material and the side walls.
  • resealable container system is suitable for storing paint, it is not limited to such applications.
  • Embodiments of the invention may be used for storing other substances, such as other liquids, powders, solids, gels, etc.
  • the metal side wall has a substantially circular cross section.
  • the upper edge portion is curled over through an angle of no less than 270°.
  • Curling over the upper edge portion to these extents provides the advantage that the resultant container rim presented to a user is smooth, and the user is not exposed to any sharp edge. Furthermore, the leading edge may be tucked away, helping to inhibit the formation of rust. Additionally, the curled-over rim is substantially rigid. Additionally, curling over the upper edge portion to this extent enables the container rim to provide a curved upper surface which can be engaged by the sealing means on the container lid and also a curved lower surface which can be engaged and gripped by the lid rim. The curved upper surface of the container rim provides a guiding surface which can gradually force the lid rim radially outwards as the lid is pressed into the closed position.
  • the outwardly curled over upper edge portion forming the container rim is generally circular in cross section.
  • the container rim is annular, for example circular.
  • the lid inner portion and metal outer portion are formed from a single metal sheet.
  • the sealing portion has a substantially semicircular cross section.
  • the sealing surface of the lid and the sealing surface of the container rim are adapted to conform to one another.
  • the upper surface of the container rim may have a substantially semicircular cross section, and the downward facing inner surface of the sealing portion may be adapted to conform to the upper surface of the container rim.
  • the sealing surface of the lid and the sealing surface of the container rim may, in cross section, have the same radius of curvature (at least when in the sealed, closed position).
  • the radius of curvature of the lid sealing surface may be arranged so as to be slightly smaller than that of the container rim sealing surface when the lid is separated from the container, such that as the lid is applied to the container the sealing portion of the lid has to bend slightly and then grips the rim sealing surface as a result of its resilience.
  • this conformity enables an extensive seal to be formed between the sealing portion and the container rim, and furthermore results in the container rim supporting the sealing portion from below when the lid is in the closed position.
  • the curved upper (i.e. outer) surface of the sealing means then provides a smooth curved surface on which the lever portion of the opening tool can pivot or rock when the tool is used to lever open the lid.
  • the close support of the underlying container rim enables this operation to be performed without distorting the lid or container body.
  • the outer wall portion is substantially cylindrical.
  • the outer wall portion extends substantially in a straight line from the sealing means to the lower end of the outer wall portion.
  • the lid edge portion is curled over through an angle of at least 270°.
  • the lid edge portion is curled over such that its leading edge substantially meets an inner surface of the outer wall portion.
  • a smooth, curved surface of the lid rim is provided for engaging and gripping the container rim when the lid is in the closed position.
  • the lid edge portion curled over the form the lid rim has a substantially circular cross section.
  • the lid rim is annular, for example at least substantially circular.
  • the container rim and lid rim are both substantially circular, the inner radius of the lid rim being smaller than the outer radius of the container rim.
  • the lid rim has to be deflected at least slightly radially outwards to fit over the widest part of the container rim and then spring back into position, to grip an underside of the container rim and hold the lid in place.
  • the container rim and lid rim are each substantially circular in cross section, and the engagement between the lid rim and container rim when the lid is in the closed position is such that a portion of an outer lower quandrant of the container rim is in contact with a portion of an inner upper quadrant of the lid rim.
  • the container rim and lid rim are each substantially circular in cross section.
  • a ratio of the diameter (i.e. cross-sectional diameter) of the container rim to the lid rim is in the range 6.0:3.0 to 7.0:2.0, and optionally is substantially 6.5:2.5.
  • the body rim cross sectional diameter is in the range 1 mm to 9mm and the lid rim cross sectional diameter is in the range 1 mm to 9mm.
  • the lid further comprises at least one slot provided in the outer wall portion and arranged to enable a suitably sized tool, for example a screwdriver, to be inserted in the slot when the lid is in the closed position to lever a portion of the lid rim beneath the slot away from its gripping engagement with the container rim, whereby the lid can be levered off the container body without using the opening tool.
  • a suitably sized tool for example a screwdriver
  • This feature of at least one slot is advantageous as, if the dedicated opening tool is lost or not available, the lid can still be removed.
  • the slot typically provides access to a volume defined between the container rim, lid rim, and lid outer wall portion.
  • a single slot is provided at a single location around the lid outer wall portion circumference to minimise disruption to the lid's integrity.
  • the sealing portion has an inverted U shape, and the supporting wall extends down from an inner arm of the U.
  • the support wall is substantially cylindrical.
  • the support wall is substantially frusto-conical.
  • the support wall extends downwardly from the sealing means for a distance D1
  • the outer wall portion extends downwardly from the sealing means for a distance D2.
  • D1 is greater than D2.
  • the support wall may be substantially cylindrical, such that it forms an interference fit with an upper end portion or section of the metal side wall when the lid is fitted to the container in a closed position.
  • the support wall can provide a supporting inner ring, supporting the upper end of the container and increasing the rigidity of the assembled structure.
  • the support wall may be frusto-conical, i.e. as the support wall extends downwardly from the sealing means it can also taper radially inwards.
  • the lower surface of the support wall (on the underside of the lid) can provide a ramped surface for engaging an inner surface of the container rim as the lid is placed on it, thereby assisting in guiding the lid into the closed position as it is pressed down.
  • the support wall extends down from the sealing means substantially lower than does the outer wall portion which carries the lid rim.
  • the support wall and lid rim may be arranged such that as the lid is introduced to the container body the support wall engages an inner surface of the outer wall (or an inner portion of the container rim) and guides the lid into place before or at the same time as the lid rim engages an upper outer surface of the container rim.
  • the support wall provides internal support to the container body (i.e.
  • the supporting wall is an outer wall of a channel formed in the lid, the channel comprising an inner wall, facing the support wall.
  • the external surface of the lid outer portion on which the lever portion pivots is an external surface of the sealing means.
  • said exterior surface of the sealing means has an inverted U shape.
  • said exterior surface is substantially semicircular in cross section.
  • said exterior surface comprises an outer half of the semicircular surface.
  • the lever portion comprises a substantially flat lever surface adapted to pivot against the pivot point or points
  • the hook portion comprises a flat hook surface for engaging said portion of the lid rim
  • the flat hook surface is arranged at an angle of 45 ⁇ 15° to the lever flat surface.
  • the lid and container rim are substantially rotationally symmetric about an axis, such that said opening position can be anywhere around the circumference of the lid.
  • the lever portion comprises an aperture adapted to accommodate part of the lid outer portion when the opening tool is in the opening position, such that the lever portion pivots about two pivot points, one on each side of the aperture, when in the opening position.
  • the lever portion comprises a curved pivot surface adapted to rock on the external surface of the lid outer portion as the opening tool is used to remove the lid.
  • the opening tool comprises a second hook portion connected to an opposite end of the lever portion to the first hook portion, the system further comprising a container handle, pivotally connected to the container body, the second hook portion being adapted to hook over the handle when the opening tool is in the opening position and such that rotation of the handle operates the opening tool to displace the engaged portion of the lid rim radially outwards.
  • Another aspect of the invention provides a lid adapted for use with a container system in accordance with the first aspect.
  • a lid for sealing a mouth of a container body of the type having a closed base and a metal side wall extending, in use, upwardly from the base to define with the base an interior volume for containing paint, the metal side wall having an upper edge portion outwardly curved over to form a container rim which defines the mouth of the container body, the removable lid being adapted to be pressed onto the container body to a closed position in which the lid seals the mouth, the lid comprising: a removable lid adapted to be pressed onto the container body to a closed position in which the lid seals said mouth, the lid comprising an inner portion and a metal outer portion surrounding the inner portion, the metal outer portion comprising a sealing portion adapted to engage with at least a portion of an upper surface of the container rim, when the lid is in the closed position to form a seal between the lid and container body, the seal extending around the container rim, an outer wall portion connected to the sealing portion and adapted to extend, when the lid is in the closed position, down past an outer
  • Another aspect provides an opening tool for a resealable container system in accordance with the first aspect.
  • lid construction enables the lid to be made from thinner sheet metal than is required for lids of the prior art systems.
  • embodiments can utilise container bodies which have side walls incorporating no ridges or kinks (which may also be described as beads), which are therefore more resistant to deformation under axial compression, and which can also be made of thinner sheet metal material than containers for prior art systems.
  • the lid closes directly on the body rim, provided at the top of the side wall, so eliminating the metal ring of certain prior art systems, requiring one less component, and hence being more environmentally friendly.
  • FIG. 3 this shows a container, which may also be referred to as a container body 1 or pail, and a lid 2 of a resealable container system embodying the invention.
  • the container body 1 has a generally cylindrical metal side wall 12, which may, in certain embodiments be slightly tapered along some or all of its length, and may therefore be partly frusto-conical, and a closed base 11.
  • the base 11 is formed from a single, generally circular piece of sheet metal, having its edges bent around the lower or bottom rim of the metal side wall 12 to form a seal or sealing rib 121.
  • the attachment between the container base 11 and side wall 12 can be achieved using a variety of known techniques to provide a container body which is able to store liquids, such as paint.
  • the closed base of the container may take alternative forms.
  • the side walls 12 and base 11 are both formed from sheet metal materials, but in alternative embodiments the base 11 may be formed from a different material.
  • the base 11 may be provided by a separate component, attached to the side wall 12.
  • the side wall 12 and base 11 may be integral, for example formed by stamping out or pressing a single sheet of material.
  • the base 11 may be formed from a different material to the metal side wall 12.
  • the side wall 12 and base 11 may be painted, coated, or otherwise provided with a suitable covering to inhibit rusting, reaction between the stored contents and the container, or contamination of the contents by the container.
  • the metal side wall extends, when the container body is resting on the base, upwardly from the base to define, together with the base, an interior volume V for containing paint.
  • the metal side wall 12 has an upper edge portion 13 which has been outwardly curled over (i.e. with respect to a longitudinal axis A of the container body, to form a container rim 14). This rim 14 defines a mouth M of the container body. The rim 14 thus extends radially outwards from the portion of the metal side wall 12 immediately adjacent the edge portion 13.
  • the upper edge portion 13 has been curled over to an extent such that its leading edge 15 substantially meets an inner surface of the curled over rim 14.
  • the outer edge portion 13 has been curled over through an angle in excess of 270°, and the resultant container rim 14 is substantially circular in cross section.
  • Fig. 4 shows the container rim in more detail, and the rim 14 has an outer surface which can be divided into an inner upper quandrant Q1, an outer upper quandrant Q2, an outer lower quandrant Q3, and an inner lower quandrant Q4.
  • the upper quadrants Q1 and Q2 together form a sealing surface 141 of the container rim, which seals against the correspondingly shaped sealing surface of the lid.
  • This sealing surface of the container rim is substantially semi-circular in cross section, and extends, uninterrupted, around the mouth of the container.
  • the seal formed between the lid and container is substantially semi-torroidal.
  • the diameter of the semi-circular sealing surface of the container rim is 6.5mm.
  • the radius of curvature of the curl-over to form the container rim upper sealing surface is 3.25mm.
  • the container body 1 also includes a pair of metal housings 18 attached to and extending radially outwards from the metal side wall 12, these housings being adapted to receive the bent ends of a metal handle 16, in this example formed from metal rod or bar. These housings are diametrically opposed from the container body 1.
  • the housings 18 are arranged such that the handle 16 can be rotated about the axis R through the centres of the housings 18 so that it can adopt a position in which the handle grip 17 is positioned directly above the centre of the container for lifting it. When the handle is released, it will typically adopt a position in which the grip 17 rests against a side of the metal wall 12.
  • the sheet metal material used to form the metal side wall 12 in this example has a thickness in the range 0.05mm to 0.40mm.
  • the generally circular cross section of the container rim 14 has a diameter of 6.5mm. It will be appreciated that different embodiments may employ different diameter rims. For example, smaller diameter cans may employ smaller diameter rims.
  • the container rim 14 as a whole is circular in this example, providing an annular rim defining the mouth M. In this example, the internal diameter of the container rim (and hence of the mouth M) is 285mm, and the external diameter of the container rim 14 (i.e. the diameter of its widest point) is 298mm.
  • alternative embodiments may of course comprise container bodies and lids of different sizes and shapes. Certain embodiments comprise container bodies having external diameters ranging from 45mm to 400mm, for example.
  • a lid i.e. the lid of fig. 3
  • the lid 2 comprises an inner portion 21, which in this example is dished downwards, and an outer portion 22 surrounding the inner portion.
  • the lid in this example is formed from a single piece of sheet metal, such that the inner and outer portions are integral parts of the single metal component. It will be appreciated that, although the lid is described as being metal, it may have a coating, covering, or the like applied to one or more of its surfaces to inhibit rust formation, reaction with contents, or corrosion of the dead material, for example.
  • the close, interference fit, between the lower (sealing) surface of the sealing means 23 and the upper, external (sealing) surface of the container rim 14 provides a seal between the lid and container when the lid is in the closed position.
  • the lid also comprises an outer wall portion 24 which extends in a straight line, directly downwards in this example, from the outer arm of the inverted U-shaped sealing means 23.
  • the outer wall portion is substantially cylindrical overall, and extends, uninterrupted, around the perimeter of the lid.
  • the lid also comprises a lid edge portion 25 which is a continuation of the outer wall portion 24 and which has been inwardly curled over to form a lid rim 26.
  • this lid rim 26 extends radially inwards from the outer wall portion 24.
  • the arrangement is such that when the sealing means 23 abuts the container rim, the outer wall portion 24 extends down past the container rim such that the lid rim engages and grips a portion of a lower surface of the container rim (i.e. when the lid is in the closed position).
  • the force exerted on the container rim by the lid rim holds the lid in place.
  • the lid edge portion 25 has been curled over through an angle in excess of 270°, to an extent such that a leading edge 27 of the lid edge portion substantially meets an inner surface of the outer wall portion 24.
  • the lid rim is generally circular in cross section.
  • the external surface of the lid rim 26 can therefore be described as generally comprising four quadrants, a lower outer quadrant LQ1, a lower inner quadrant LQ2, an upper inner quadrant LQ3, and an upper outer quadrant LQ4.
  • quadrant LQ3 of the lid rim is in contact with, and exerts a force on quadrant Q3 of the container rim.
  • This exerted force has components in the radially inward direction and the axially upwards direction.
  • the lid rim in this example has an overall circular, i.e. annular, shape.
  • the outer diameter of the lid rim which is the same as the outer diameter of the outer wall portion 24, is 299.5mm.
  • the support wall 28 As the support wall 28 is angled, it provides a guiding surface for guiding the lid into the correct position as it is pushed into the closed position. As the support wall 28 is longer than the outer wall portion 24 in the axial direction, when the lid is first placed in the container the support wall engages and supports an inner surface of the side wall 12 (just inside its mouth) before or at the same time as the lid rim is required to be defected radially outwards to fit over the widest part of the container rim.
  • the support wall 28 is advantageous in that it lends rigidity to the assembly of the container and lid in the closed position, helping to prevent distortion of the container rim and lid when the opening tool is used to detach the lid.
  • the support wall 28 is an outer wall of a groove 201 provided in the lid 2. An inner wall 29 of the groove faces the support wall 28, and a base of the groove is defined by a flat annular wall portion 30.
  • the lid formed from thin tinplate in this example, also comprises a plurality of strengthening features 200. These features 200, each provided by distorting the sheet tinplate used to form the lid, provide additional rigidity.
  • the cross section of the sealing portion 23 of the lid is continuously curved, having no straight portion, as is the correspondingly-shaped upper portion of the container rim which provides the container sealing surface 141.
  • the contact between the supporting wall 28 and side wall 12 will generally be an annular portion (a ring) of the side wall material, generally at its upper end.
  • an opening tool 3 which comprises a lever portion 31 and a hook portion 32.
  • the lever portion 31 is in the form of a generally straight arm or bar having a substantially flat surface 33 for resting against and pivoting on an external surface of the lid.
  • the lever surface 33 is adapted to engage and pivot about a pivot point P on the outer surface of the lid sealing means.
  • the upper end of the lever 31 is moved radially inwards, such that the lever 31 pivots about pivot point P, and the lower end of the lever 31 is displaced radially outwards, such that the hook surface 34 pushes the lid rim 25 radially outwards to disengage it from its grip on the container rim 13.
  • the outer wall portion 24 bends to a small extent as this action is performed, and the sealing portion 23 which extends from the outer wall portion 24 is also elastically deformed, thereby breaking the seal between it and the container rim 13.
  • the angle between the substantially flat hook surface 34 and substantially flat lever surface 33 is labelled as x.
  • x is approximately 45° but in alternative embodiments x may take alternative values, such as values falling within the range 30 to 60°.
  • the hook surface 34 can engage an extended portion of the container rim, helping to enable removal of the lid without permanently distorting or damaging it.
  • the tool 3 also comprises a loop of material 35, passing through an aperture provided in the lever portion 31, this lever 35 enabling the tool to be attached to another entity for safe-keeping.
  • FIG. 10 shows another opening tool 3 for use in container systems embodying the invention.
  • the tool comprises a lever portion 31 and hook portion 32 formed from a single piece of sheet metal.
  • the tool 3 comprises a handle portion 310 attached to an end of the lever portion 31 opposite the end to which the hook portion 32 is attached.
  • the lever portion 31 also comprises an aperture 301 which, when the tool is in the opening position, is able to receive and accommodate a portion of the container lid outer portion such that the lever portion 31 pivots on two portions 33a and 33b of its flat lever surface, those portions 33a and 33b being located on either side of the central aperture 301.
  • the hook portion 32 has an extended width, and provides a substantially flat hook surface 34 for hooking under and engaging the lid rim.
  • This tool 3 comprises a lever portion 31 which has a curved lever surface 33 for rocking on the curved exterior surface of the lid sealing means when the tool is being used to open the lid.
  • a hook portion 32 is provided at a first end of the lever portion 31, and has an inclined hook surface 34 for hooking under and engaging the lid rim to open the lid.
  • a second hook portion 36 is provided at the opposite end of the lever means 31, this second hook portion having a surface 361 which in cross section is part-circular.
  • This second hook portion is adapted to hook onto the container handle 17, with the surface 361 engaging the exterior, generally circular in cross section surface of the handle 17.
  • This tool 3 is adapted to fit onto the lid in an opening position in which the arm or lever 31 pivots about its curved surface 33, whilst at the same time the hook surface 34 engages the lid rim as the second hook portion 36 is hooked onto the handle.
  • FIG. 12 this is a photograph showing the closing of a container system embodying the invention.
  • the lid is being manually pressed down at two positions around its circumference onto the container to clip the lid into place.
  • the points at which pressure is applied can thus be moved around the circumference of the lid until it is fully in the closed position.
  • the lid can be resealed on the container time after time, and without needing special tools or additional equipment.
  • the dedicated opening tool of the invention incorporating the lever and hook, as this enables opening of the lid without damaging the lid or container, but a screwdriver can be used in conjunction with the aperture 240 if the dedicated opening tool has been lost.
  • the outer wall portion 24 is uninterrupted, except for the slot 240. Unlike certain prior art systems, there are no separate tabs or claws.
  • the dedicated opening tool may be necessary to open the system. This is in contrast to certain prior art systems in which the lid is be adapted to enable removal without use of tools.
  • the resealable lid and container system is suitable for use with mixing machines as the lid can be opened to allow addition of colour and mixing, and can then be used to easily re-seal the container.
  • a lid within lid structure is therefore not required.
  • the lids embodying the invention are easy to remove; an opening tool can be used to lever off the lid at just one circumferential position, and then the lid can pop off.
  • Lids embodying the invention can easily be closed onto containers to seal those containers, by manual application of force at one or more positions around the circumference, working those positions around, or by simultaneous pressing down on the entire circumference of the lid sealing portion, with a flat plate or suitably dimensioned ring having a flat pressing surface, in an automated filling and closing line, for example.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
EP12175619.1A 2011-07-08 2012-07-09 Système de récipient refermable destiné au stockage de la peinture Active EP2578511B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PT10580011A PT105800A (pt) 2011-07-08 2011-07-08 Sistema de recipiente reselável para conter tinta.

Publications (2)

Publication Number Publication Date
EP2578511A1 true EP2578511A1 (fr) 2013-04-10
EP2578511B1 EP2578511B1 (fr) 2015-05-27

Family

ID=47720972

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12175619.1A Active EP2578511B1 (fr) 2011-07-08 2012-07-09 Système de récipient refermable destiné au stockage de la peinture

Country Status (3)

Country Link
EP (1) EP2578511B1 (fr)
ES (1) ES2539779T3 (fr)
PT (2) PT105800A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4011797A1 (fr) 2020-12-11 2022-06-15 Colep Portugal, S.A. Système de conteneur

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB400008A (en) 1932-11-03 1933-10-19 Lauritz Andreas Sand Improvements in and relating to closures for cans and like containers
GB471119A (en) * 1936-02-25 1937-08-25 Percy Nind Ward Improvements in and relating to tins or containers
GB488243A (en) 1937-09-08 1938-07-04 Charles De Franca Hedges Improvements in containers for syrup, paint or the like material
GB653873A (en) * 1947-08-02 1951-05-30 Podesta Armando Improvements in or relating to closure means for bottles or like containers
CA1181604A (fr) * 1984-06-13 1985-01-29 Vern Ginther Dispositif pour enlever les couvercles encerclant hermetiquement le bord de contenants
FR2935967A1 (fr) * 2008-09-15 2010-03-19 Marie France Lieutard Dispositif polyvalent destine a ouvrir les boites de conserves et autres conteneurs compatibles etanches
WO2011066635A1 (fr) * 2009-12-03 2011-06-09 Brasilata S.A. Embalagens Metálicas Agencement de fermeture pour canettes

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3410448A (en) * 1965-06-07 1968-11-12 Sherwin Williams Co Container construction

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB400008A (en) 1932-11-03 1933-10-19 Lauritz Andreas Sand Improvements in and relating to closures for cans and like containers
GB471119A (en) * 1936-02-25 1937-08-25 Percy Nind Ward Improvements in and relating to tins or containers
GB488243A (en) 1937-09-08 1938-07-04 Charles De Franca Hedges Improvements in containers for syrup, paint or the like material
GB653873A (en) * 1947-08-02 1951-05-30 Podesta Armando Improvements in or relating to closure means for bottles or like containers
CA1181604A (fr) * 1984-06-13 1985-01-29 Vern Ginther Dispositif pour enlever les couvercles encerclant hermetiquement le bord de contenants
FR2935967A1 (fr) * 2008-09-15 2010-03-19 Marie France Lieutard Dispositif polyvalent destine a ouvrir les boites de conserves et autres conteneurs compatibles etanches
WO2011066635A1 (fr) * 2009-12-03 2011-06-09 Brasilata S.A. Embalagens Metálicas Agencement de fermeture pour canettes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4011797A1 (fr) 2020-12-11 2022-06-15 Colep Portugal, S.A. Système de conteneur

Also Published As

Publication number Publication date
ES2539779T3 (es) 2015-07-06
PT105800A (pt) 2013-01-08
PT2578511E (pt) 2015-07-22
EP2578511B1 (fr) 2015-05-27

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