NZ243239A - Flexible cartridge for preparation of beverage in a fluid pressure extraction machine; process for manufacture - Google Patents

Flexible cartridge for preparation of beverage in a fluid pressure extraction machine; process for manufacture

Info

Publication number
NZ243239A
NZ243239A NZ243239A NZ24323992A NZ243239A NZ 243239 A NZ243239 A NZ 243239A NZ 243239 A NZ243239 A NZ 243239A NZ 24323992 A NZ24323992 A NZ 24323992A NZ 243239 A NZ243239 A NZ 243239A
Authority
NZ
New Zealand
Prior art keywords
cartridge
membrane
rim
extraction
package
Prior art date
Application number
NZ243239A
Inventor
Olivier Fond
Petr Masek
Original Assignee
Nestle 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 Nestle Sa filed Critical Nestle Sa
Publication of NZ243239A publication Critical patent/NZ243239A/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D81/00Containers, 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B29/00Packaging of materials presenting special problems
    • B65B29/02Packaging of substances, e.g. tea, which are intended to be infused in the package
    • B65B29/022Packaging of substances, e.g. tea, which are intended to be infused in the package packaging infusion material into capsules
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00Apparatus for making beverages
    • A47J31/06Filters or strainers for coffee or tea makers ; Holders therefor
    • A47J31/0657Filters or strainers for coffee or tea makers ; Holders therefor for brewing coffee under pressure, e.g. for espresso machines
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D2565/00Wrappers or flexible covers; Packaging materials of special type or form
    • B65D2565/38Packaging materials of special type or form
    • B65D2565/381Details of packaging materials of special type or form
    • B65D2565/385Details of packaging materials of special type or form especially suited for or with means facilitating recycling

Landscapes

  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Mechanical Engineering (AREA)
  • Apparatus For Making Beverages (AREA)
  • Packages (AREA)
  • Tea And Coffee (AREA)
  • Supporting Of Heads In Record-Carrier Devices (AREA)
  • Cartons (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Abstract

The packaging is in the form of a cartridge containing a powdery composition for a drink, having a body (1) of frustoconical, inverted frustoconical or hemispherical shape and a membrane (2) serving as a cover. The cartridge comprises a stiffening element (3) making possible its extraction by a fluid under pressure, while directing the flow of fluid through the bed of powdery composition. Certain variants can be deformed during extraction and are fitted to the different types of espresso machines without the parts of these machines being modified. <IMAGE>

Description

<div id="description" class="application article clearfix"> <p lang="en" class="printTableText">24 3 2 39 <br><br> Fric.:^ <br><br> - &gt; 1 ''«*»» M i <br><br> Compile -.n r \ :: J&amp;M3A- <br><br> ci^s: Qkf.QZjI&amp;h;.., ,,, <br><br> niMiiiMiiiiMitiiMlHHilinHHIII «• M • II M li i i I t H i i M t . n &lt; I i I i m i H g I <br><br> Pub'icf^n JUN 1994 <br><br> ruu.l^c.v.^ll L•»£*«.*©• MH f I H « i I n H i i I f H I <br><br> P.O. Journal, No: 'M <br><br> //% *1 tv,\ <br><br> A FLEXIBLE PACKAGE WITH A STIFFENING ELEMENT AND A PROCESS FOR ITS PRODUCTION <br><br> WE, SOCIETE DES PRODUITS NESTLE S.A., a Swiss company of Entre-deux-Villes, Vevey, SWITZERLAND <br><br> hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: <br><br> - 1 - <br><br> (followed by page la) <br><br> 24 3 2 3 9 <br><br> i&lt;=* <br><br> This invention relates to a package in the form of an open or closed flexible cartridge for the preparation of a beverage adapted to extraction machines operating by fluid under pressure. <br><br> 5 There are several reasons for the use of cartridges for the preparation of a beverage from a powder-form substance, above all in the field of espresso type coffees extracted under pressure, namely: hygiene, optimal keeping of the coffee, ease of use, better control of the quality 10 of the coffee obtained and good reproducibility of the extraction conditions. <br><br> There are two main versions of these cartridges, namely: open, with the upper and lower faces permeable to allow the extraction fluid to pass through, or closed, 15 opening automatically in the extraction machine. <br><br> To preserve the quality of the coffee by protecting it against moisture and oxygen, open cartridges have to be packed in impermeable bags or provided with impermeable peelable covers on both faces. For their part, closed 20 cartridges are made from impermeable materials. <br><br> To comply with legislation on the recycling of packaging materials in various countries, a new cartridge design needs to be developed using several different materials (paper, card, aluminium, plastic), the cartridge being open 25 or closed. <br><br> On the other hand, to satisfy economic and commercial requirements, these various types of cartridges need to be able to be produced on the same packaging machines and to be extracted in the same extraction machines. 30 Finally, to reduce the consumption of material in the production of cartridges, the cartridges need to be simplified. This may be done, for example, by eliminating the filter at the bottom of the cartridge. <br><br> The use for ecological or economic reasons of flexible 35 materials of minimal thickness and/or impermeable to oxygen <br><br> (followed by pags 2) <br><br> 243239 <br><br> 2 <br><br> for the production of cartridges containing, for example, ground coffee and intended to be extracted under the pressure of hot water generally involves the problem of providing the cartridges with a predetermined shape allow-5 ing proper extraction of the powder-form substance and of maintaining that shape after handling, transport and storage. <br><br> Now, to obtain good extraction of these cartridges, the cartridges have to be able exactly to follow the inner 10 shape of the extraction machine to avoid any preferential passage of water beyond the layer, for example of coffee. <br><br> A process for the extraction of capsules made of flexible materials is described, for example, in FR PSS 1 537 031 and 2,033,190. This process is attended by numer-15 ous disadvantages. <br><br> First of all, it is difficult to carry out because the upper and lower faces of the cavity of the machine intended to receive the capsule are provided with a plurality of projections and holes. <br><br> 20 In addition, the process is neither dependable nor reproducible because it is impossible to obtain all the desired openings under the effect of the water pressure. This is because, as soon as one or more openings has/have been formed, the pressure in the capsule falls because the 25 liquid is able to flow. <br><br> Accordingly, the number and position of the openings are uncertain. This situation can result in poor extraction of the layer of substance because, as the filter is pressed against the lower face, it cannot be drained over 30 its entire surface. Extraction is incomplete and heterogeneous because of the existence of zones with preferential passages and poorly irrigated and drained zones. <br><br> In addition, the process in question is not hygienic. This is because, in view of the plurality of orifices for 35 the passage of water and the high temperature of the ma- <br><br> 24 3 2 3 9 <br><br> chine, deposits of organic materials difficult to eliminate are inevitably formed. <br><br> Accordingly, this process is vulnerable to blockages because the successive deposits of organic materials in the 5 plurality of small orifices can contribute towards the gradual blockage thereof. In these circumstances, the quality and regularity of the extractions are affected to an even greater extent. <br><br> Finally, the process in question is used with a carlo tridge containing a powder-form or liquid basic substance. In the case of coffee, it can only be soluble coffee which has to be dissolved with water or a concentrated liquid coffee which has to be diluted with water. Neither the process nor the cartridge can be used in the case of ground 15 coffee. <br><br> FR-A-2 617 389 describes a frustoconical cartridge which is provided with a filtering base and which is closed by upper and lower covers. The cartridge in question consists of five parts with the result that its production 20 involves a large number of operations, including two welding steps. <br><br> The problem addressed by the present invention was to provide an open or closed cartridge in the shape of a frustum, inverted frustum or hemisphere which would be made 25 predominantly of flexible materials and which would retain its original shape, particularly during extraction, so that extraction would take place correctly by the passage of the extraction fluid with no preferential flow paths through the layer of powder-form substance, and which could be ex-30 tracted in conventional espresso machines by means of a suitable adapter or without such a device. <br><br> In addition, the package would comprise few parts and would therefore be easy to produce. <br><br> The package according to the invention consists of a body 35 in the form of a frustoconical, inverted frustoconical or <br><br> 243 <br><br> hemispherical cavity which is provided with a rim and which contains a powder-form substance for the preparation of a beverage, and of a membrane applied to the rim of the body. <br><br> It is characterized in that it comprises a complemen-5 tary stiffening element independent of the body and in that the element is annular or, if the stiffening element is the membrane, is circular so that the extraction fluid is able to circulate through the layer of powder form substance during extraction through exact adaptation of the cartridge to 10 the extraction machine. <br><br> The advantage of this cartridge in its closed version is that it does not comprise an actual filter. <br><br> In a first embodiment, the stiffening element is formed by a frustoconical jacket provided with a rim 15 designed for application to the rim of the body. The cartridge is made up of three parts, namely a body, a jacket and a membrane. <br><br> The effect of the jacket is to stiffen the body of the cartridge, although it may also cover a large part of 20 the membrane. However, the jacket must not completely cover the membrane it must all the same allow the passage of the injection needle provided in certain extraction machines. <br><br> The jacket may be disposed on the inside or the 25 outside of the body of the cartridge. <br><br> If, in the first case, the rim of the jacket is of the same size as the rims of the body and the membrane, the jacket is welded thereto on its two faces. If the rim of the jacket is shorter than that of the body and the mem-30 brane, the jacket may be welded thereto on its two faces but, at all events, the body and the membrane are in part directly welded to one another. <br><br> If the jacket is made of plastic, its interposition between the body and the membrane of the cartridge may 35 perform the function of a fusible seal which promotes the <br><br> -6MAY~94 <br><br> 24 3 2 3 9 <br><br> fluid-tightness of the cartridge in its closed version. <br><br> In cases where the jacket is disposed on the outside of the body of the cartridge, it may be welded at its rim to the rim of the body. The diameter of the membrane may 5 be equal to or larger than that of the body. The membrane is always welded to the rim of the body although, if the rim of the body is shorter, the membrane may also be directly welded in part to the jacket. <br><br> In another configuration, projecting ribs may be 10 integrated in the jacket of the cartridge. The jacket, which is made of injection-moulded plastic, has opening ribs on its lower face, in which case the cartridge is in the shape of an inverted frustum. <br><br> The opening ribs integrated in the base of the jacket 15 do project, but are neither directly cutting or directly perforating. Tearing of the lower wall of the cartridge on contact with the projecting elements is only possible because the projecting elements allow the lower wall to reach its breaking stress during deformation under the 20 effect of the air and water pressure. The ribs are formed by small linear or sinuous or arcuate fillets which are circular in cross-section and more or less flattened or widened slightly in the downward direction and which are arranged radially, concentrically, parallel or perpendic-25 ularly on the flow grill of the extraction machine and vary in length. <br><br> The arrangement of the ribs has been optimized to allow uniform distribution of the flow zones of the extract, i.e. better irrigation and hence better extraction 30 of the layer of powder-form substance and better quality of the extract obtained. <br><br> These elements are variable in length according to their position on the base of the cartridge, the diameter of the lower face and the constituent material of the body. 35 Their cross-section is semi-circular, more or less flat- <br><br> 6 <br><br> 943239 <br><br> tened or more or less widened in the downward direction. Their average diameter preferably varies from 0.5 to 5.0 mm. They may also be conical or frustoconical in cross-section. They may vary in number from 4 to 16, depending 5 on the diameter of the lower face. <br><br> In the open version, the body and the membrane of the cartridge may be made of such materials as filter paper or nonwoven synthetic fibres. The cartridge is then packed in a bag impermeable to oxygen and water vapour so that it has 10 a sufficient storage life pending use. <br><br> In order to increase the stiffness of the cartridge, the wall of the jacket and the wall of the body may be fluted so that they are in the form of concentric annular ribs. <br><br> 15 In one variant, the jacket may be perforated and may have openings in its annular wall in the interests of economy of material. <br><br> In a second embodiment relating to a cartridge in the form of a frustum, inverted frustum or hemisphere, the 20 stiffening element is a ring applied to the rim of the body, the cartridge also comprising three parts. <br><br> In a third embodiment of a cartridge in the form of an inverted frustum, the stiffening element is formed by a frustoconical collar at the major base of the frustum of 25 the body extended by a flange in the outer radial direction, the cartridge again comprising three parts. <br><br> In a fourth embodiment, the stiffening element is the membrane itself so that the cartridge comprises two parts. The membrane may be perforated in the open version of the 30 cartridge, which is thus in the shape of a frustum or inverted frustum, and perforated in the closed version which is in the form of an inverted frustum, the perforation being formed, for example, by means of a hollow needle. <br><br> 35 In particular variants of the second and third embodi- <br><br> 7 <br><br> 24 3 2 3 9 <br><br> ments described above adaptable to various sizes of the extraction machine, the body of the cartridge is flexible and laterally and longitudinally deformable which provides for extension of the cartridge during extraction. A 5 cartridge such as this can be extracted in the majority of commercial espresso coffee machines without requiring an adapter. <br><br> In the open version, the cartridge may have a centrally perforated base. The openings may be large, for example 10 in the form of permanent holes apparently formed in the wall by hot needles or apparently closed in the case of slots. In the latter case, the cartridge may be extracted by means of a specific cartridge holder provided with ribs on the flow grill. Under the effect of pressure, the 15 material deforms at the ribs and the slots formed in the base of the capsule are enlarged to allow the extract to flow. In the case of ground coffee, there is thus a preliminary effect comprising an increase in pressure and compacting and wetting of the coffee. <br><br> 20 Depending on the impermeability of the material to oxygen, the cartridge may be wrapped as such when it is closed or may optionally be packed in bags which are themselves impermeable to oxygen and which allow storage for 6 to 12 months. In the latter case, the cartridges may be 25 packed in groups, for example of 2 to 10, because - as they are closed - they themselves will keep for a few days, for example for 2 to 15 days, after the bag has been opened. <br><br> The cartridge comprises two or three parts, namely a flexible body and a stiff membrane or a flexible body and 30 membrane and a stiffening element. The body is frustoconical in shape or in the form of an inverted frustum. The cross-section of the body is rounded, in other words it may be circular, oval or polygonal with rounded edges. <br><br> The cartridge according to the invention may be 35 extracted with the device comprising a grill according to <br><br> applicants' European patent 512 470. The cartridge may also be extracted in a conventional espresso type coffee machine by means of a specific adapter such as described in the European patents 521 187, 521 188 and 5 521 397. <br><br> In the adaptable embodiments mentioned above where the body is deformable and extendable, extraction may be carried out without modification of the various components 10 of the extraction machine, i.e. without any need for an adapter. <br><br> The extraction machines according to the patent applications cited above enable this simplified cartridge to be extracted under good conditions. The cartridge opens 15 automatically in the extraction machine and, after use, may be withdrawn easily and integrally with a minimum of waste grounds or packaging material. <br><br> The present invention also relates to a process for the production of the package in which the body of the car-20 tridge comprising a rim is thermoformed or stamped from a first film, the body thus formed is filled with a powder-form composition for a beverage in a stream of inert gas, after which the membrane formed from a second film is sealed to the body of the cartridge. <br><br> 25 The process is characterized in that an annular stif fening element or, if the stiffening element is the membrane, a circular stiffening element is placed on the rim of the body and sealed to the body and optionally to the membrane. <br><br> 30 The . invention is described in more detail in the following with reference to various embodiments of cartridges illustrated by way of example in the accompanying drawings, wherein: <br><br> Figures 1, 2, 3 and 4 are diagrammatic medial sections 35 through various frustoconical or inverted frustoconical <br><br> -m <br><br> &lt;.J I; . I . <br><br> 24 3 2 3 9 <br><br> cartridges with a jacket. <br><br> Figure 5 is a plan view of the jacket of an inverted frustoconical cartridge with opening ribs integrated in the jacket. <br><br> 5 Figures 6 and 7 are respectively a section A-A through the cartridge associated with the jacket shown in Fig. 5 and a section B-B through the jacket shown in Fig. 5. <br><br> Figure 8 is a medial diagrammatic section through a frustoconical cartridge. <br><br> 10 Figure 9 is a medial diagrammatic section through a cartridge with a circular stiffening element formed by the membrane. <br><br> Figures 10 and 11 are medial diagrammatic sections through cartridges with an annular stiffening collar (Fig. 15 10) or ring (Fig. 11). <br><br> Figures 12 to 15 diagrammatically illustrate the production process for the cartridges. <br><br> Referring to Figs. 1 to 4, the body 1 and the membrane 2 of the cartridge consist of thin flexible films. The 20 jacket 3 has a frustoconical shape adapted to the body with its stiff, thick wall. It is disposed on the inside (Fig. 1) or outside (Fig. 2) of the body and comprises a rim 4 sealed to the rim 5 of the body. <br><br> In Fig. 3, the jacket 3 partly covers the base 6 of 25 the body at its periphery. The jacket 3 is fluted in the version shown in Fig. 4 to increase its stiffness. <br><br> The cartridge shown in Figs. 5, 6 and 7 comprises radial ribs 7 varying in length which are integrated in the perforated base 8 of the jacket 3. <br><br> 30 In the cartridge shown in Fig. 8, which is frusto conical in shape, the jacket 3 covers almost the entire upper face 9 of the body, but leaves a central opening 10 for the passage of the hollow needle of the extraction machine. <br><br> 35 In the versions shown in Fig. 9 relating to a closed <br><br> 24 3 2 39 <br><br> 10 <br><br> cartridge and in Figs. 10 and 11 relating to open cartridges, the stiffening element is either the membrane 2 (Fig. 9) or a frustoconical annular collar 11 disposed on the major base of the frustum of the body 1 extended by a 5 rim 12 in the outer radial direction (Fig. 10) or a wide ring 13 on the rim of the body. In the versions shown in Figs. 10 and 11, the cartridges are extendable in diameter and height so that they may be used in the majority of commercial espresso coffee machines without necessitating 10 modification of the filter holders of the machines. <br><br> These cartridges are open, i.e. the flexible walls of the body and membrane have perforations 14 and 15. <br><br> In a variant (not shown) , a closed cartridge may comprise a collar or a ring as described above as the 15 stiffening element. <br><br> The cartridges shown in Figs. 1 to 9 may be of the open or closed type. <br><br> In the closed version, the thin walls of the body 1 and the membrane 2 may be made of the following constituent 20 materials of a barrier layer: <br><br> aluminium, preferably 20 to 50 /xm thick, with a heat-sealable lacquer, <br><br> multilayer composite of plastic, for example polyethylene, polypropylene, polyamide, polystyrene or poly-25 ester, and a plastic material impermeable to oxygen, <br><br> for example a copolymer of vinyl alcohol and ethylene optionally filled with silica or metallized, or poly-vinylidene chloride, <br><br> multilayer composite of aluminium, preferably 8 to 20 30 pen thick, paper weighing 20 to 60 g/m2 and a plastic material such as mentioned above, preferably 20 to 60 /m thick. <br><br> The thick-walled jacket (Figs. 1 to 8) or the thick membrane (Fig. 9) may be made of a thermoformed or injec-35 tion-moulded plastic material such as mentioned above, for <br><br> 24 3 2 3 9 <br><br> n example between 0.3 and 1 mm in thickness. <br><br> It may consist of a multilayer composite of card, for example weighing 100 to 300 g/m* , and a plastic material such as mentioned above between 20 and 60 /xm in thickness. <br><br> 5 In the open version, the body 1 and the membrane 2 may consist, for example, of filter paper or of a composite of perforated or woven or nonwoven polyester or polypropylene, for example weighing 15 to 40 g/m2 . The jacket 3 and the thick-walled membrane 2 are made of a material such as 10 mentioned above. <br><br> In the case of a stiffening element in the form of a collar or ring, for example as illustrated in Figs. 10 and 11, the thin walls of the body 1 and the membrane 2 are made of a plastic material such as mentioned above, but 15 without a barrier layer, and are perforated (in the case of Figs. 10 and 11). The body 1 and the membrane 2 may also be made of filter paper or woven or nonwoven synthetic fibres. The thicker stiffening elements are made either of a plastic material or of cardboard or a multilayer plas-20 tic/card composite. <br><br> In the versions shown in Figs. 1 to 9, a layer of filter paper or woven or nonwoven synthetic fibres may be provided between the substance to be extracted and the lower inner wall of the cartridge in order completely to 25 eliminate the risk of dispersion of grounds after extraction. This layer may optionally be bonded to the wall. <br><br> As shown in Fig. 12, the process for the production of a cartridge comprises the following steps: <br><br> The body 1 is formed at 16 by stamping with a die and 30 a cavity block and the rim is formed by folding at 17. <br><br> At 18, the jacket made beforehand by thermoforming, injection moulding or moulding is placed inside the cavity thus formed. <br><br> Ground coffee 20 is measured out and tamped at 19 and, 35 at 21, the membrane is welded to the rim of the jacket <br><br> 12 <br><br> 24 3 2 39 <br><br> which in turn is welded to the rim of the body. The operations of measuring, tamping and welding of the membrane are carried out under nitrogen. This process may be used for the production of the cartridge shown in Fig. 1. <br><br> 5 Referring to Fig. 13, the jacket 3 is formed at 22, <br><br> for example by thermoforming or injection moulding if it is made of plastic or by forming if it is made of card. At 23, the body 1 is stamped out inside the jacket deposited beforehand in a cavity block. Ground coffee 20 is measured 10 out and tamped at 24 and the rim 5 of the body is formed by folding at 25. At 26, the membrane 2 is welded to the rim 5 of the body and the rim 5 is in turn welded to the jacket 3. In a variant (not shown), the body is not formed in the jacket 3, instead a cover is placed at the bottom of the 15 jacket and welded, the coffee is measured out and the membrane is welded. The operations of measuring out, tamping and welding of the membrane are carried out under nitrogen. The illustrated process is used for the production of the cartridges shown in Figs. 2, 3, 4, 6 and 8. 20 In Fig. 14, the process comprises the steps of thermo forming the body at 27, measuring out and then tamping the coffee at 28 to the rim 29, and at 30 cutting out the thickmeni-brane 2 and welding the thick membrane to the rim 29. The cartridge is cut out at 31. <br><br> 25 The process illustrated in Fig. 15 differs from that shown in Fig. 14 solely in the fact that the body 32 is thermoformed, an annular stiffening collar 11,12 is welded to the body, the coffee is introduced and tamped and the membrane 2 thermoformed beforehand is welded to the rim 5 30 of the body. Conversely, the outer radial part of the collar may of course be applied to the rim of the body and the membrane may be welded beforehand of thereafter. The base of the body and the membrane are then perforated at their centres (14,15) at 33. <br><br> 35 In Fig. 16, the process is carried out as in Fig. 15, <br><br> 24 3 2 3 9 <br><br> 13 <br><br> except that a stiffening ring 13 is applied to part of the rim of the body. <br><br> In all the versions described in this specification, the cartridge according to the invention may vary in size according to the desired volume of beverage. For example, the dose of coffee may vary between 5 and 20 g, the diameter of the cartridge is between 2.5 and 8 cm and the thickness of the layer of coffee is between 10 and 25 mm. <br><br> The cartridge is filled with a powder-form composition for the preparation of a beverage. This substance is preferably roasted and ground coffee, but may also be tea, <br><br> soluble coffee, a mixture of ground coffee and soluble coffee or a chocolate-flavoured product. <br><br> In every case, the extraction fluid will be directed in a vertical stream to pass through the entire layer of powder-form composition without any danger of lateral flow paths being created. <br><br></p> </div>

Claims (12)

1. 14
WHAT^WE CLAIM IS'.*;1. A package in the form of an open or closed flexible cartridge for the preparation of a beverage adapted to an extraction machine operating by fluid under pressure,;5 consisting of a body in the form of a frustoconical, inverted frustoconical or hemispherical cavity which is provided with a rim and which contains a powder-form substance for the preparation of a beverage being closed by a membrane applied to the rim of the body, characterized 10 in that it comprises a complementary stiffening element independent of the body and in that the element is annular or, if the stiffening element is the membrane, is circular so that the extraction fluid is able to circulate through the layer of powder-form substance during extraction 15 through exact adaptation of the cartridge to the extraction machine.;2. A package as claimed in claim 1, characterized in that the stiffening element is formed by a frustoconical jacket disposed on the inside or outside of the body.;20
3. A package as claimed in claim 1, characterized in that the body is in the form of a frustum or inverted frustum;. . * s . . . . and in that the stiffening element is a ring applied to the rim of the body or a frustoconical collar at the major base of the frustum of the body extended by a rim in the outer 25 radial direction.
4. A package as claimed in claim 1, characterized in that the body is in the form of an inverted frustum or hemisphere and in that the stiffening element is the membrane.
5. A package as claimed in claim 3, characterized in that 30 the body is deformable so that the cartridge adapts itself to different extraction systems.
6. A package as claimed in claim 2, characterized in that the cartridge is an inverted frustum and in that the jacket comprises projecting opening ribs on its lower face. 35 7. A process for the production of the package claimed
- .V1 AY 24 3 2 3 9 15 in claim 1, in which the body of the cartridge comprising a rim is thermoformed or stamped from a first film, the body thus formed is filled with a powder-form composition for a beverage in a stream of inert gas, after which the 5 membrane formed from a second film is sealed to the body of the cartridge, characterized in that a stiffening element is placed on the rim of the body and sealed to the body and optionally to the membrane.
8. A process as claimed in claim 7, characterized in that 10 the stiffening element is formed before or separately from shaping of the body.
9. A process as claimed in claim 7, characterized in that, to make an open cartridge, the base of the body and membrane are perforated. 15
10. A process as claimed in claim 7, characterized in that slots are formed in the central part of the base of the cartridge and in that extraction is carried out by means of a cartridge holder formed with ribs on the flow grill, in that the slots are closed in appearance and become larger 20 under the pressure of the fluid during extraction, the material of the base deforming at the ribs so that an increase in pressure is established and the powder-form substance is compacted and wetted before the flow of the extract.
11. A package as claimed in claim 1, substantially as herein described with reference to drawings 1 to 11 inclusive.
12. A process as claimed in claim 7, substantially as herein described with reference to drawings 12 to 16 inclusive. SOCIETE DES PRODUITS NESTLE S.A. f X/\aca' By Their Attorneys r 1 BALDWIN SON S CAREY A' A J/
NZ243239A 1991-07-05 1992-06-19 Flexible cartridge for preparation of beverage in a fluid pressure extraction machine; process for manufacture NZ243239A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91111214 1991-07-05

Publications (1)

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NZ243239A true NZ243239A (en) 1994-06-27

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NZ243239A NZ243239A (en) 1991-07-05 1992-06-19 Flexible cartridge for preparation of beverage in a fluid pressure extraction machine; process for manufacture

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ATE128692T1 (en) 1995-10-15
JP3150202B2 (en) 2001-03-26
MY109148A (en) 1996-12-31
CA2072300A1 (en) 1993-01-06
FI108427B (en) 2002-01-31
FI922897A0 (en) 1992-06-22
AU1841492A (en) 1993-01-07
DE69205232D1 (en) 1995-11-09
BR9202610A (en) 1993-03-16
NO922617D0 (en) 1992-07-02
ZA924490B (en) 1993-03-31
EP0524464B1 (en) 1995-10-04
CA2072300C (en) 2003-05-27
AU649844B2 (en) 1994-06-02
DK0524464T3 (en) 1996-02-12
KR100221342B1 (en) 1999-10-01
NO922617L (en) 1993-01-06
EP0524464A1 (en) 1993-01-27
FI922897A (en) 1993-01-06
MX9203966A (en) 1992-10-01
JPH05199938A (en) 1993-08-10
KR930002201A (en) 1993-02-22
ES2078598T3 (en) 1995-12-16
NO303536B1 (en) 1998-07-27
DE69205232T2 (en) 1996-03-14

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