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EP2646332A2 - Récipient, découpe de récipient et procédé de fabrication associé - Google Patents

Récipient, découpe de récipient et procédé de fabrication associé

Info

Publication number
EP2646332A2
EP2646332A2 EP11805138.2A EP11805138A EP2646332A2 EP 2646332 A2 EP2646332 A2 EP 2646332A2 EP 11805138 A EP11805138 A EP 11805138A EP 2646332 A2 EP2646332 A2 EP 2646332A2
Authority
EP
European Patent Office
Prior art keywords
container
base
air
layer
wall
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
EP11805138.2A
Other languages
German (de)
English (en)
Other versions
EP2646332B1 (fr
Inventor
Ian Darby
Mike D. Rodgers
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.)
Individual
Original Assignee
Individual
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
Priority claimed from GBGB1020123.4A external-priority patent/GB201020123D0/en
Priority claimed from GBGB1117963.7A external-priority patent/GB201117963D0/en
Application filed by Individual filed Critical Individual
Publication of EP2646332A2 publication Critical patent/EP2646332A2/fr
Application granted granted Critical
Publication of EP2646332B1 publication Critical patent/EP2646332B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
    • 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
    • B65D37/00—Portable flexible containers not otherwise provided for
    • 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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • B65D75/5861—Spouts
    • B65D75/5872—Non-integral spouts
    • B65D75/5877—Non-integral spouts connected to a planar surface of the package wall
    • 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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
    • B65D81/3888—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation wrappers or flexible containers, e.g. pouches, bags
    • B65D81/3893—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation wrappers or flexible containers, e.g. pouches, bags formed with double walls, i.e. hollow

Definitions

  • CONTAINER CONTAINER BLANK
  • This invention relates to a container, to a container blank, and to a method of manufacturing the container.
  • the invention relates in particular to a self-supporting closed container.
  • the container is expected to have is primary utility for containing liquids such as beverages during their transportation and storage, and the following description will therefore relate primarily to such applications. However, the use of the container for some solids (such as granular solids) is not excluded.
  • the present invention is directed to a closed container, i.e. a container which can fully enclose a material such as a liquid.
  • a closed container i.e. a container which can fully enclose a material such as a liquid.
  • the word "container” used in the remainder of this application refers to a closed container rather than an open- topped container such as those described in the above patents.
  • the containers are sufficiently rigid to be self-supporting, i.e. they do not collapse under their own weight when empty, or under the weight of the liquid when full.
  • Some containers obtain at least some of their structural strength from the contained product, so that the containers are not self-supporting.
  • Gelatinous liquids such as soups for example are often supplied within a pouch having a front wall, a rear wall and a base.
  • the material from which the walls are made is of flexible plastics, and the material is sufficiently thick to allow the container to stand up when full of the soup.
  • the material is not sufficiently thick to support its own weight when empty, however.
  • Such containers are therefore not suitable for materials which may be consumed over a period of time, for example fruit juices or milk, for which the container should be self- supporting, i.e. sufficiently rigid to stand up regardless of the volume of product contained.
  • Other containers are made from aluminium and glass, and whilst these containers are self-supporting they are not universally acceptable.
  • Aluminium containers in particular are not preferred since they are not readily resealable, so that the contained material may not retain its optimum freshness once the container has been opened.
  • Glass containers are self-supporting and can be resealable, but are typically too heavy for more widespread use. Both aluminium and glass containers must be transported empty from the container manufacturer to the product supplier, and that represents an oncost since the transporting vehicle will typically not be fully utilised.
  • the weight of packaging is a factor in the cost of the product to the eventual customer.
  • the weight of the packaging directly affects the cost of transportation, both from the container manufacturer to the product supplier, and from the product supplier to the retailer or customer.
  • the product supplier will typically seek to reduce the weight of the packaging, and will also typically seek to avoid the under-utilisation of the vehicle delivering the empty containers.
  • a commonly-used self-supporting container for fruit juices is made of carton board (such as that sold under the trade name "Tetra Brik” (RTM) for example).
  • a carton board container comprises a vessel having a square cross-section in plan view with walls comprising a number of layers of different materials. Most of the structural strength is provided by a layer of card.
  • the card is made waterproof by at least one layer of plastics.
  • One or more additional layers are provided for specific purposes, for example a metallic layer to prevent the passage of oxygen through the wall whereby the shelf-life of the product is extended.
  • Carton board containers are particularly beneficial in terms of space utilisation during transportation. Firstly, the container can be made and delivered to the user in a collapsed, substantially flat, condition, and it can be erected before being filled. Secondly, the filled container can be stacked alongside other similar containers during delivery to the retailer or customer, with relatively little wasted volume. Despite their advantages and widespread utilisation, carton board containers have a number of disadvantages. Firstly, they are necessarily made from a number of layers of different materials, which makes recycling a used container more difficult. Whilst many local authorities accept used carton board containers for recycling, they are rarely if ever separated into their primary components so that those components can be reused.
  • the product supplier is required to have a dedicated machine to erect the container, the machine undertaking the necessary folding and gluing operations.
  • the machine is necessarily complex and any breakdown may require the services of a dedicated technician as the machine may be significantly different to the other machines at the supplier's location.
  • Self-supporting plastics containers are commonly used for liquids such as water and milk. Plastics containers are often used where oxygen migration is not a significant concern, and so these containers typically do not utilise a metallic layer. PE and PET are commonly used material for plastics containers of this type. It is not, however, typical to make the container lid from PET, so that the lids of PET containers in particular must be recycled separately from the remainder of the container. Self-supporting containers which obtain some of their structural strength from air-filled chambers are described in WO 2009/021329, US 2,751 ,953, WO 80/02545, and also GB 2 333 085.
  • the inventors have appreciated that a new container is required which seeks to avoid or reduce the above-stated disadvantages of the various known containers and is particularly (but not exclusively) suitable for use with liquids such as milk and fruit juices.
  • the inventors have also sought to provide a container which weighs no more than, and ideally weighs less than, the known containers of similar volume.
  • a self-supporting container having at least one wall, a base and a top, the top having a closable spout, the wall being made of plastics material and including at least one wall air chamber, the base having at least one base air chamber, said at least one base air chamber having a dimension which is greater than the dimension of the base whereby the base of the container is concave.
  • the air within the wall air chamber and the base air chamber which provides the structural strength necessary for the container to be self- supporting. Accordingly, when the container is empty the air chamber(s) can also be empty, whereupon the container is not self-supporting and can be collapsed for transportation, whereby the utilisation of the transportation vehicle can be maximised.
  • At least one base air chamber having a dimension which is greater than the dimension of the base creates a base with an "over-centre" feature, i.e. a tendency to be concave or convex rather than flat. It can be arranged that the filling machine ensures that the base is concave, whereby the erected container rests upon the periphery of its base rather than the whole of its base, and is thereby more stable.
  • the container is substantially rectangular (ideally square) in plan view, with four walls.
  • embodiments utilising a single air chamber at each corner have the additional advantage of increasing the available area of each of the walls of the container which is suitable for the application of printed labels and product information.
  • a self-supporting container having at least one wall, a base and a top, the top having a closable spout, the wall being made of plastics material and including a plurality of air chambers, the container having means to permit the deflation of some of the air chambers during emptying of the container.
  • Embodiments of the invention according to the second aspect have advantages as containers for use with particular industrial materials. With some industrial materials it is desirable to avoid the material coming into contact with air.
  • the containers for those materials are usually emptied by the application of a reduced (vacuum) pressure applied to the container spout.
  • the container is designed to collapse as its contents are transferred to a machine for subsequent processing. It is, however, a known concern that the collapsing container might not be completely emptied. Thus, a container which collapses in an uncontrolled manner may sometimes trap some of the material and prevent its removal. Depletion devices are commonly introduced into the containers so as to ensure that the collapse of the container is controlled and all of the material may be emptied.
  • the present invention can avoid the requirement for separate depletion devices.
  • the container By arranging for the collapse of some, but not all, of the air chambers (and in particular not all of the air chambers in the walls of the container), the container can partially collapse as its contents are emptied, but can retain enough structural rigidity to reduce or avoid the likelihood of some of the material becoming trapped.
  • Two separate air networks can be provided, both of which networks can be inflated to provide the container with structural support during transportation.
  • the first air network can be opened or released to allow the container to collapse as the contents are emptied, but the second air network can be maintained so as to provide sufficient structural rigidity to ensure complete emptying.
  • the air chambers defining one side wall of the container are connected together as the second air network, and the remaining air chambers are connected together as the first air network.
  • all of the air chambers are interconnected in a single air network. There is therefore only the need to undertake one inflation operation for all of the air chambers.
  • the air chambers are arranged in two (or more) separate air networks which must be inflated (and deflated) separately.
  • a self-supporting container having at least one wall, a base and a top, the wall being made of plastics material and including at least one air chamber, the container having a spout assembly with a first passageway adapted to permit material to be introduced into and removed from the container and a valve to permit the inflation of the at least one air chamber.
  • the valve includes disabling means adapted to open the valve. The disabling means can be operated to allow air to flow out of the air chamber(s) when the container has been emptied.
  • a self-supporting container having at least one wall, a base and a top, the top having a closable spout, the wall being made of plastics material and including at least one air chamber, the top being made of a two-layer material, the spout having a passageway to permit a material to be introduced into and removed from the container and a base plate surrounding the passageway, the base plate being located between parts of each layer of material in the top of the container.
  • the spout is fixed to one layer of wall material before the second layer of wall material.
  • a first layer of wall material is provided, and an opening in made through the layer (which will provide the filling opening).
  • a substantially rigid spout is fixed by way of its base plate to the first layer, with the passageway of the spout aligned with the opening.
  • a second layer of wall material is then laid over the first layer of wall material, the second layer of wall material having a corresponding opening to surround the passageway.
  • the second layer of material is fixed to the base plate of the spout whereby the spout is secured between the two layers.
  • the base plate can include a passageway communicating with the air chamber(s) whereby air can be introduced between the layers of wall material.
  • the wall(s), base and top of the container are made from a polyolefin such as polyethylene of polypropylene, or from polyester, all of which are known to be suitable as packaging materials.
  • the spout or spout assembly can also be made from the same material, whereby the container is made from a single material and is ideally suited to recycling.
  • the wall(s) of the container are ideally made from a two-ply sheet of plastics material.
  • the regions of the sheet which will form the respective air chambers are separated from the regions of the sheet which will not form air chambers by seams which join the two layers together.
  • the present invention therefore also provides a blank for the container, the blank comprising two layers of plastics material formed with seams joining selected parts of the layers together.
  • the blank can be folded and respective parts of the folded blank joined together whereby to make a (collapsed or flattened) container suitable for transportation to the user.
  • the user can simply pump air into the air chamber(s) whereby to erect the container prior to (or preferably at the same time as) filling with material.
  • the seams are formed by a welding operation, so that the use of other materials such as adhesives is avoided. This facilitates recycling of the container since it can comprise a single material.
  • the container When the container has been emptied by the customer, it can be deflated (e.g. punctured), whereupon it will lose its structural strength and can be collapsed so as to minimise the volume for subsequent transportation.
  • the container can include a weakened zone such as a tear strip or the like to facilitate deflation when empty.
  • air is compressible adds a further advantage to the present invention, in that the container can be squeezed and will return to its erect shape when released. This is advantageous for gelatinous products such as soups and the like, allowing their easier removal from the container.
  • the fact that a layer of air surrounds part of the product can also have an insulating effect, which can be beneficial during transportation of a chilled product from the retailer to the customer's home, for example.
  • the use of separate air networks can be utilised, the first network comprising the interconnected air chambers which provide the structural support for the container, the second network comprising the wall(s) which are inflated to provide insulation.
  • the use of separate air networks is desired since the pressure within the second (insulation) network should typically be lower than the pressure within the first (structural support) network.
  • a collapsible container having four walls, a base and a top, the base and the top being substantially rectangular, the top having a closable spout, at least one air chamber defining each corner of the container between adjacent walls, the walls, base and top being of two- layer material, the collapsible container having fold lines whereby to define the form of the container when collapsed, there being at least one fold line in an opposing pair of walls whereby the opposing walls are folded inwardly in the collapsed container.
  • a collapsible container which can be folded in such a fashion is often called a "gusseted bag" (or is often said to utilise “side gussets”), and is known to be used with containers.
  • the layers of material forming the base and top are secured together (as by welding) to define the required shape of the container, and further fold lines can be provided for the base and top, whereby parts of the base and top can be folded inwardly or outwardly in order to provide a substantially flat bag ready for erection and subsequent filling with material.
  • Gusseted bags can readily be erected into a container having a substantially flat base and substantially flat sides.
  • the present inventors are apparently the first to utilise the benefits of a gusseted bag arrangement for an inflatable container, and in particular for a container having walls, top and base made of two-layer (or two-ply) material.
  • the top of the collapsed container can be readily accessible so that the filling spout and the inflation valve can be accessed and the container can readily be erected (by inflation) at the same time as it is filled.
  • Embodiments of the invention can use one or more of the above aspects, as desired.
  • air chambers Whilst reference is made herein to "air chambers", it will be understood that the chamber(s) can be filled with a gas other than air if desired.
  • Fig. .1 shows a blank for the container according to the present invention
  • Fig. .2 shows a perspective view from above of an erected container according to the present invention
  • Fig. .3 shows a perspective view from below of the container of Fig.2;
  • Fig. .4 shows a more detailed view of the top of the container
  • Fig. .5. shows a sectional view of part of the top of the container
  • Fig. .6 shows a side view of the spout assembly of the container
  • Fig. .7 shows a perspective view from below of the spout assembly of Fig.6;
  • Fig. .8 shows a perspective view from above of the spout assembly of Fig.6;
  • Fig. .9 shows a sectional view through the spout assembly of Fig.6;
  • Fig. .10 shows a sectional view of the valve member of the spout assembly
  • Fig. .1 1 shows a sectional view of an alternative spout assembly
  • Fig. .12 shows a perspective view from below of part of an alternative embodiment of container according to the present invention
  • Fig.13 shows a sectional view of part of the base of the container of Fig.12;
  • Fig.14 shows a blank for an alternative container according to the present invention
  • Fig.15 shows a perspective view from below of part of a container produced from the blank of Fig.14;
  • Fig.16 shows a sectional view of the container of Fig.15;
  • Fig.17 shows a collapsed container according to the present invention.
  • Fig.18 shows a blank for another alternative container according to the invention.
  • the container 10 shown in Fig.2 is constructed from a blank 12 shown in Fig .1 .
  • the blank 12 comprises a two-ply polypropylene sheet, i.e. sheet comprising two layers of polypropylene, one of the layers overlying the other.
  • the two layers are joined together by a number of seams 14a-i, the seams being created by a welding process or the like which is known to adhere two layers of polypropylene together.
  • the blank comprises a two-ply sheet of another polyolefin material, such as polyethylene.
  • Fig.2 The structure of the erected container shown in Fig.2 is dependent upon the arrangement of the seams 14, as will be explained below. Whilst many of the seams 14 are interconnected, they will be described separately below according to their function.
  • the seam 14a defines the outer wall of an annular valve chamber 16, and the seam 14b defines the inner wall of the annular valve chamber.
  • the seams 14c define the walls of a passage 20 connecting the valve chamber 16 to a top chamber 22.
  • the top chamber 22 is defined by a top seam 14d and a lower seam 14e, and by respective parts of two side seams 14f.
  • the top seam 14d is continuous, as are the side seams 14f.
  • the side seams 14f are connected to a bottom seam 14g which is also continuous.
  • the lower seam 14e is not continuous, and has a number of gaps 24. Each of the gaps 24 is provided to permit air to pass from the top chamber 22 into a respective wall air chamber 26.
  • the sides of each air chamber 26 are defined by longitudinal seams 14h, the top of each air chamber is defined by a part of the lower seam 14e, and the 5 bottom of each air chamber 26 is defined by a part of the upper seam 14i of the bottom chamber 30.
  • the bottom chamber 30 is defined by the upper seam 14i, the bottom seam 14g, and respective parts of the side seams 14f.
  • the upper seam 14i has gaps 32 10 corresponding to the gaps 24 in the lower seam 14e.
  • the longitudinal seams 14h separate the air chambers 26 from first regions 34 and 20 second regions 36 which do not become filled with air.
  • the blank 12 can be made from two continuous layers of polypropylene material, i.e. the seams 14a-i can be welded and the layers cut to form the blank 12, in a substantially continuous operation.
  • the blank 12 is folded and the side edge 40 is welded or otherwise secured onto the side edge 42.
  • the top panel 44 and the bottom panel 46 are also folded and welded or otherwise secured to form the top 50 of the container and the base 52 of the container respectively.
  • the top 50 and base 52 of the container will have multiple sheets of polypropylene.
  • the salvage i.e. the excess parts of the top panel 44 and bottom panel 46
  • the top wall 50 and the base 52 comprise substantially a single (two-ply) sheet, so that the weight of the container 10 is minimised.
  • At least the base 52 can be welded from the inside, if desired.
  • two air chambers 26 define each of the vertical corners of the container.
  • the (narrower) first regions 34 are bent to provide the corners of the container, whereas the (wider) second 10 regions 36 are substantially flat and provide much of the side walls of the container.
  • a spout assembly or gland 54 is mounted to the top 50 of the container 10.
  • the spout assembly 54 is made of polypropylene to match the material of the blank 12, and thereby facilitate recycling of a used container.
  • the spout assembly 15 54 is, however, of considerably thicker material than the sheet making up the blank 12, so that it is substantially rigid.
  • the spout assembly 54 is shown in more detail in Figs. 4-10, and comprises a base plate 56 which can be welded or otherwise secured to the material at the top 50 of the 20 container. Ideally, the base plate 56 is secured between the two layers of polypropylene which lie within the seam 14b defining the inner edge of the annular valve chamber 16, whereby the annular valve chamber 16 surrounds the fill passageway 60 and the valve passageway 62.
  • the blank 12 includes further seams defining a passage 58 (see Fig.5) whereby the valve passageway 62 can communicate with the annular valve chamber 16. If desired, in other embodiments the valve passageway 62 can overlie the enlarged part 28 of the annular valve chamber 16 (see Fig.1 ) whereby air can pass directly into the valve chamber.
  • the base plate 56 carries a fill tube 64 which defines the fill passageway 60, and has a screw thread 66 whereby to accept a screw cap 70, in known fashion.
  • the base plate 56 also carries a valve tube 72 which defines the valve passageway 62.
  • the valve tube 72 locates a valve member 74 as described in more detail below. It will be understood that during the process of manufacturing the container 10, a section of the polypropylene material lying within the inner seam 14b is removed, and the border of the removed material is welded or otherwise secured to the base plate 56 surrounding the fill passageway 60, so that the fill passageway 60 opens into the interior of the erected container.
  • the filling machine includes means to hold the fill tube 64 during filling of the container, and also includes means to pump air into the valve tube 72. Accordingly, a filling machine can pump air into the air chambers 22, 26 and 30 of the container 10 whereby to erect the container, at substantially the same time as the container is being filled with product.
  • the added complexity of the means to pump air into the valve tube 72 is relatively minor compared to a machine required to erect a carton board container, and is not likely to be a barrier to users. In addition, it is likely to take far less time to fill the air chambers 22, 26, 30 with air than it is to fill the container 12 with liquid, so that the inflation step will not impact adversely upon the filling process.
  • the valve member 74 is located in the "open" position shown in Figs. 5, 6 and 9 as air is being pumped into the air chambers 22, 26, 30, air being able to pass through the openings 78 in the valve member 74.
  • the valve member is pressed into the valve tube 72, to the "closed” position shown in Fig.10, sealing the air within the air chambers 22, 26, 30 and maintaining the self-supporting structural rigidity of the container 10.
  • Fig.1 1 shows an alternative embodiment of spout assembly 154 (without the screw cap) in which the fill tube 164 is manufactured as a separate component to the base plate 156. These components are secured together by complementary formations 80.
  • the advantage of such an arrangement is that the screw cap does not need to be screwed onto the fill tube 164 after the container has been filled, this being a relatively slow operation. Instead, the fill tube 164 and its pre-fitted screw cap can be pressed into position after the container has been filled.
  • Figs. 12 and 13 show the bottom part of an alternative container 1 10, made from an alternative design of blank.
  • the top part of the container 1 10 is not shown, but may be similar to the top part of the container 10 for example.
  • the base 152 has base air chambers 82 in addition to the bottom chamber 130.
  • the base air chambers 82 are connected to the bottom chamber 130 by respective gaps in the bottom seam of the blank.
  • the base air chambers 82 provide a more rigid base, and help to define the structure of the container 1 10 when the air chambers are filled.
  • the salvage of the bottom panel of the blank is welded after the air chambers 22, 26, 130 and 82 have been filled which will secure the base in its erected condition.
  • the top 50 of the container 10 can be gabled or substantially flat, or made as a single continuous panel, as desired, depending upon the form of the blank and the folding and welding steps.
  • FIG.14 An alternative design of blank 212 for producing a container is shown in Fig.14, and the bottom of a container 210 which is produced from the blank is shown in Figs. 15 and 16.
  • the container 210 which is produced from the blank 212 has several similarities with the container 10, namely four walls (which are substantially vertical in use), a top including a spout assembly, and a base.
  • the blank 212 differs from the blank 12 in providing only a single air chamber 226 for each of the (vertical) corners of the container.
  • the annular valve chamber 216 is connected to the top chamber 220, which in turn is connected to the bottom chamber 230 by way of only four air chambers 226.
  • the blank 212 also differs from the blank 12 in having base air chambers which will provide the structure of the base 252 (somewhat similar to the blank used to form the container 1 10 of Figs 12 and 13).
  • the bottom chamber 230 is connected to two primary base air chambers 84 and two secondary base air chambers 86.
  • the respective primary base air chambers 84 lie on opposed sides of the base 252
  • the respective secondary base air chambers 86 lie on opposed sides of the base, between the primary base air chambers 84.
  • the dimension d of the primary base air chambers 84 is slightly greater than half of the dimension w which is the width of the base 252 (inside the bottom chamber 230) of the erected container.
  • the edges 88 of the primary base air chambers 84 are secured together the combined dimension 2d of the primary base air chambers exceeds the width w of the erected container.
  • the primary base air chambers 84 are filled with air they are not able to lie in a common plane, i.e. the base 252 is not flat, but instead the primary base air chambers 84 tend to push the base inwards (concave) or outwards (convex). It can be arranged that the machine which fills the air chambers (and which is ideally the machine which also fills the container with product), will drive (and hold) the base in its concave position.
  • the secondary base air chambers 86 act to lock the primary base air chambers 84 in position, i.e. they enhance the "over-centre" arrangement. It is arranged in particular that the force with which the primary and second base air chambers 84,86 tend to maintain the concave position will exceed the weight of the contents which seeks to push the base 252 towards its convex position.
  • annular valve chamber 216 is larger than the annular valve chamber 16 relative to the width w of the base (and top).
  • the blank 212 therefore provides a container with a relatively larger spout assembly. It could be arranged in an alternative embodiment that the spout assembly spans substantially all of the top of the container, which is desirable when the contained product is a solid which does not readily flow, for example breakfast cereals such as corn flakes.
  • the blank 212 also differs from the blank 12 in providing notches 90 in the bottom chamber 230.
  • the notches 90 lie at the respective outer corners of the base 252.
  • the reduction in the cross-section of the bottom chamber 230 at each corner serves to "flatten" the base, i.e. it removes excess material which might otherwise fold or buckle at the corners.
  • the erected container 210 will rest upon the bottom chamber 230, the bottom chamber 230 providing the junction between the walls and base of the erected container.
  • the container therefore rests upon the periphery of its base rather than the whole of its base (similar to a wine bottle).
  • the periphery of the base is substantially flat than the whole of the base, with the result that the erected container 210 is more stable.
  • the contact area upon which the erected container 210 rests is relatively small, less care needs to be taken over the seams of the base 252, as only those seams which lie within the contact area affect the stability of the container.
  • FIG.17 Another alternative blank 312 for producing a container is shown in Fig.17.
  • the blank 312 differs from the blanks 12 and 212 in having two separate air networks.
  • the air networks are both designed to be filled by way of the spout assembly (not shown), and so the blank 312 has two separate valve air chambers 316a, 316b, each having its own enlarged part 328a and 328b which can be connected to a respective valve tube.
  • the spout assembly therefore has two separate valve openings, perhaps similar to the valve openings 62 (and two separate valves), one for each of the air networks.
  • the valve chamber 316a communicates with the top chamber 322 and wall air chambers 326 in a similar fashion to the blanks 12 and 212.
  • the air chambers 326 communicate with the bottom chamber 330 (and hence to the base air chambers 384 and 386) by way of a single gap 332 in the upper seam 314i.
  • An additional seam 314h is provided between the upper seam 314i and the air chambers 326, and an additional seam 314j is provided inside the seam 314f.
  • the chambers formed between the seams 314f and 314j, and between the seams 314i and 314h, comprise conduits of a second air network.
  • the seam 314h has openings 92 therethrough, each of the openings 92 communicating with a respective wall panel 336. Air can therefore be delivered through the valve chamber 316b into the second air network which includes the wall panels 336.
  • the blank 312 is suitable for producing an insulating container, with the first air network being filled with higher-pressure air so as to provide the structure of the container, and the second air network being filled with lower pressure air so as to provide an insulating layer for the wall panels.
  • first air network and the second air network can be varied by varying the configuration of the seams on the blank.
  • first air network is filled with air to inflate three of the four walls of the container and perhaps also the base, whilst the second air network is filled with air to inflate the fourth wall.
  • the blank 312 also shows another feature, which serves to form a collapsed container 310 of Fig.18.
  • fold lines 94 and 96 are formed therein.
  • the fold lines 94 are formed to fold inwardly (i.e. down into the paper as drawn, whereas the fold lines 96 are formed to fold outwardly (i.e. up from the paper as drawn).
  • the container may be folded into the gusseted bag shown in Fig.18
  • the blanks 12 and 212 can also be modified to provide two separate air networks, and/or to provide a gusseted bag, if desired.
  • the features which are shown for each blank 12, 212, 312 are generally interchangeable so as to provide a blank having all of the desired features of the resulting container.
  • a means for deflating the container is shown in Fig .1 .
  • a weakened section 38 of one or both of the layers of polypropylene are provided at a chosen location of the container. In this embodiment the weakened section 38 is provided in the top chamber 22, but it will be understood that it could be provided in alternative locations such as the base or one of the walls, as desired.
  • a strip of material 48 is secured adjacent to the weakened section 38, and in this embodiment lies between the two sheets of polypropylene, so that a part of the strip 48 lies within the top chamber 22, and a part lies outside the top chamber.
  • a part of the outer layer of polypropylene (within the top panel 44) is removed to expose the end of the strip 48 and allow the tear strip to be gasped by the user.
  • the strip may be pulled to tear or rupture the weakened section 38, and allow the escape of air.
  • a tear strip such as 48 and a weakened section such as 38 can be used in the other embodiments (and blanks) described herein.
  • a single tear strip can span both of the air networks so that they are deflated together, or separate tear strips can be provided for each air network, whereby the separate air networks can be deflated separately.
  • a strip of material similar to the strip 48 is adhered to one of the layers of polypropylene adjacent to the weakened section 38, i.e. the tear strip does not lie between the two sheets of polypropylene.
  • the tear strip is extended to project beyond the top panel 44, so that it is not necessary to remove a part of the top panel in order to expose the tear strip.
  • the container does not need to be square in plan view, but could instead be oblong.
  • Other shapes such as triangular, hexagonal or cylindrical could be provided if desired, but rectangular shapes are preferred because they minimise the volume of wasted space during transportation.
  • a container according to the present invention is both lighter and more space efficient than the known HDPE plastics containers used for milk.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Cartons (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)

Abstract

La présente invention a trait à un récipient autoportant (10 ; 110 ; 210 ; 310) qui est doté d'au moins une paroi (36 ; 336), d'une base (52 ; 152 ; 252 ; 352) et d'une partie supérieure (50 ; 350). La partie supérieure est pourvue d'un bec verseur pouvant être fermé (54) permettant au récipient d'être approprié pour stocker et transporter des matériaux tels que des boissons et d'autres liquides. La paroi est constituée de matière plastique et inclut au moins un réservoir d'air de paroi (26 ; 226 ; 326). La base est dotée au moins d'un réservoir d'air de base (84, 86), le ou les réservoirs d'air de base ayant une dimension (2d) qui est supérieure à la dimension (w) de la base, ce qui permet à la base du récipient d'être concave. La forme concave de la base permet au récipient d'être plus stable lors de l'utilisation. La présente invention a également trait à une découpe permettant de réaliser le récipient et à un procédé de fabrication de la découpe de récipient.
EP11805138.2A 2010-11-29 2011-11-24 Récipient et découpe de récipient Not-in-force EP2646332B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB1020123.4A GB201020123D0 (en) 2010-11-29 2010-11-29 Container
GBGB1117963.7A GB201117963D0 (en) 2011-10-18 2011-10-18 Container
PCT/GB2011/052313 WO2012073004A2 (fr) 2010-11-29 2011-11-24 Récipient, découpe de récipient et procédé de fabrication associé

Publications (2)

Publication Number Publication Date
EP2646332A2 true EP2646332A2 (fr) 2013-10-09
EP2646332B1 EP2646332B1 (fr) 2015-08-26

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Application Number Title Priority Date Filing Date
EP11805138.2A Not-in-force EP2646332B1 (fr) 2010-11-29 2011-11-24 Récipient et découpe de récipient

Country Status (3)

Country Link
US (1) US20130248540A1 (fr)
EP (1) EP2646332B1 (fr)
WO (1) WO2012073004A2 (fr)

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CN110506006B (zh) 2017-04-27 2022-02-11 宝洁公司 将膨胀材料添加到柔性容器中的方法
CN110494367B (zh) 2017-04-27 2021-10-01 宝洁公司 密封具有膨胀材料的柔性容器的方法
US20180370203A1 (en) * 2017-06-23 2018-12-27 Jeanine Longo Storage of Beauty Products in a Carton
JP6543306B2 (ja) * 2017-07-31 2019-07-10 花王株式会社 シート材容器
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JP7146447B2 (ja) * 2018-05-21 2022-10-04 花王株式会社 シート材容器
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JP7245010B2 (ja) * 2018-08-06 2023-03-23 藤森工業株式会社 注出スパウト
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Also Published As

Publication number Publication date
EP2646332B1 (fr) 2015-08-26
WO2012073004A2 (fr) 2012-06-07
US20130248540A1 (en) 2013-09-26
WO2012073004A3 (fr) 2012-09-07

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