WO2007113066A1 - Gas-filled sachet - Google Patents

Gas-filled sachet Download PDF

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Publication number
WO2007113066A1
WO2007113066A1 PCT/EP2007/052093 EP2007052093W WO2007113066A1 WO 2007113066 A1 WO2007113066 A1 WO 2007113066A1 EP 2007052093 W EP2007052093 W EP 2007052093W WO 2007113066 A1 WO2007113066 A1 WO 2007113066A1
Authority
WO
WIPO (PCT)
Prior art keywords
sachet
gas
transverse
filled
sealing
Prior art date
Application number
PCT/EP2007/052093
Other languages
French (fr)
Inventor
Gagan Deep
Pratap Singh
Abhay Parkash Thorat
Original Assignee
Unilever N.V.
Unilever Plc
Hindustan Unilever Limited
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 Unilever N.V., Unilever Plc, Hindustan Unilever Limited filed Critical Unilever N.V.
Publication of WO2007113066A1 publication Critical patent/WO2007113066A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/745—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool
    • B29C65/7451—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool the severing tool and the welding tool being movable with respect to one-another
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/745—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool
    • B29C65/7457—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool comprising a perforating tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/745—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool
    • B29C65/7461—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using a single unit having both a severing tool and a welding tool for making welds and cuts of other than simple rectilinear form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/004—Preventing sticking together, e.g. of some areas of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/244—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being non-straight, e.g. forming non-closed contours
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/348—Avoiding melting or weakening of the zone directly next to the joint area, e.g. by cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B29C66/43129—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams said flat seams being transversal but non-orthogonal with respect to the tubular or hollow articles, i.e. oblique
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81427—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single ridge, e.g. for making a weakening line; comprising a single tooth
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81433—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined being toothed, i.e. comprising several teeth or pins, or being patterned
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • B29C66/83221—Joining or pressing tools reciprocating along one axis cooperating reciprocating tools, each tool reciprocating along one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/849—Packaging machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof
    • B65B51/26—Devices specially adapted for producing transverse or longitudinal seams in webs or tubes
    • B65B51/30—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes
    • B65B51/303—Devices, e.g. jaws, for applying pressure and heat, e.g. for subdividing filled tubes reciprocating along only one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
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    • B65B61/18—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
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    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
    • B65B9/213—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles the web having intermittent motion
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B65D75/44—Individual packages cut from webs or tubes
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    • B29C65/16—Laser beams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3656—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a layer of a multilayer part to be joined, e.g. for joining plastic-metal laminates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3672—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
    • B29C65/3676—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic
    • B29C65/368—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic with a polymer coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/133—Fin-type joints, the parts to be joined being flexible
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B29C66/712—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined the composition of one of the parts to be joined being different from the composition of the other part
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B2220/00—Specific aspects of the packaging operation
    • B65B2220/08—Creating fin seals as the longitudinal seal on horizontal or vertical form fill seal [FFS] machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/007—Perforating strips of completed packages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B9/00—Enclosing successive articles, or quantities of material, e.g. liquids or semiliquids, in flat, folded, or tubular webs of flexible sheet material; Subdividing filled flexible tubes to form packages
    • B65B9/10—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs
    • B65B9/20—Enclosing successive articles, or quantities of material, in preformed tubular webs, or in webs formed into tubes around filling nozzles, e.g. extruded tubular webs the webs being formed into tubes in situ around the filling nozzles
    • B65B9/2056—Machines for packages of special type or form

Definitions

  • the present invention relates to gas-filled sachets containing extrudable compositions.
  • Sachets are small packages, which are used for packing single dose or small number of doses of products such as adhesives, lubricants, medicines, cosmetics, shampoos, conditioners, liquid soaps, food pastes, sauces, creams, lotions and dentifrices.
  • Single dose sachets are often used as sample sachets during advertisement and promotion of products and therefore, they have become indispensable sales and marketing tools.
  • Sachets are also very convenient form of packages for sale of new products to consumers, who do not wish to spend more money experimenting with new products, as the cost of the same products sold in conventional packages like a bottle or a jar is comparatively high.
  • Sachets are also convenient to use during travel, when smaller quantities can be carried without spillage.
  • Sachets provide a simple, cost-effective and convenient form of packaging for almost all fluid materials. Sachets are preferred by consumers over conventional forms of flexible packs such as laminated tubes and rigid packs such as hand-actuated dispensers especially, for their convenience and cost benefits .
  • Dual phase or multiphase compositions have the potential of combining two or more functional compositions into a single product that can be applied in one application. However, with any such multiphase composition it is obviously important that the combined product remains functional and effective and that it remains usable over a reasonable product life span. Consumers have recently shown an increasingly diverse sense of appreciation in regard to the value e.g. of cosmetic materials, which are required to possess certain additional merits related to their intrinsic appeal as objects of beauty which provide pleasure in use, in addition to performing the basic functions of being useful and effective.
  • each of the phases are dispensed into a separate container such that the respective phases are generally maintained separate, remain stable, and that in viewing the product, each phase, as packaged, appears visually distinct.
  • containerizing a multiphase cosmetic composition it is important that the respective phases comprising the composition be dispensed in a manner such that the particular phases are present and occur throughout the final product such that in gathering a single application from a container, the user is likely to gather an adequate amount of each respective phase.
  • partitioned tube packages which have been described for packaging incompatible compositions. Partitioned tube packages are expensive, require complex manufacturing capabilities and therefore are not suitable for the low-end markets.
  • Sachets are generally used to deliver a unit dose of a single substance. However, in some instances they have been used to simultaneously dispense doses of two different substances .
  • FR2696995 (SOCOPLAN SA, 1994) describes sachet packages for liquid, powdered or paste products comprising two containers, one within the other, each containing a different product. This is formed by separately forming a primary and a secondary tube and subsequently inserting the primary tube within the second tube of larger transverse dimension. The second tube is then heat sealed at predetermined intervals opposite the seal of the inner tube to form a series of concentric inner and outer containers. The containers are filled and then cut along the seals to form individual packages.
  • FR2644141 (ARSENE MICHEL, 1990) describes a device for packaging semi-liquid, creamy and pasty products presented in heat-sealed sachets, discharging the product by folding one part of the sachet over the other after transverse fracture.
  • the invention consists in using a frangible rigid or semi-rigid planar face. This device is used for sachets having one or two compartments and provides for a sachet that can containerize two different compositions.
  • WO0187736 (COLGATE PALMOLIVE CO, 2001) describes a dual chamber sachet that overcomes the problem of non-uniform dispensing when the sidewalls of the sachet are depressed by the use of a relatively thin intermediate divider wall, rounded corner edges at the lower end of each chamber of the sachet, tapered side edges up to the exit channel of each chamber of the sachet.
  • This structure prevents the downward flow of substances in each chamber during dispensing.
  • the substances are directed upwardly by the rounded lower corners of the sachet, the tapered upper walls and the wide dispensing opening.
  • This relatively wide dispensing opening minimizes the back pressure caused by the substances flowing to a dispensing exit of a width less than that of the product chambers .
  • sachet packs described in prior art are suitable for many applications, but the processes involved in making such dual-chambered or partitioned sachets is cumbersome and not economically feasible owing to the multiplicity of operations involved. In effect, the consumer is likely to end-up paying a higher amount, which would offset the benefits of offered by such small packages. Partitioned sachets would require special manufacturing capabilities and machine modifications to form the intermediate dividing wall. These options therefore are not technically and economically viable.
  • Another problem with partitioned sachets is that as the sachet walls are depressed to dispense substances from each chamber of the sachet, some of the substances will be forced downward into areas of corners of the sachet. This substance will not be dispensed.
  • the present inventors have devised a solution to the problem of packaging compositions having a plurality of distinct phases in small packages, while avoiding the use of multicompartment packages, thereby providing significant technical advancement over packages for multiphase compositions described in prior art.
  • the inventors have also offered a cost-effective means of packaging multiphase compositions, which packages are also able to withstand the rigors of transportation and handling, thereby providing significant economic benefits, both to the manufacturers and the consumers .
  • compositions having plurality of visually distinct phases can be advantageously packed in gas-filled sachets.
  • an object of the present invention to provide an easy and cost effective method of packaging compositions having plurality of distinct phases.
  • Another object of the present invention is to provide a process for making sachets containing a composition comprising plurality of visually distinct phases.
  • the present invention relates to a gas-filled sachet containing an extrudable composition, said composition comprising plurality of distinct phases that are not separated by a barrier.
  • the phases are compositionally and/or visually distinct .
  • the sachet comprises a dispensing passage of reduced cross sectional area with respect to the body of the sachet.
  • the present invention relates to a process for preparing a gas-filled sachet containing an extrudable composition comprising plurality of distinct phases, said process comprising the steps of: a. conveying a sheet material to a sachet former where the opposite longitudinal edges of the material are overlapped and parallely juxtaposed; b. sealing said overlapping longitudinal edges of said sheet material, form a hose where said sealed edges define the longitudinal seam of the sachet; c.
  • the present invention relates to a gas-filled sachet containing an extrudable composition, said composition comprising plurality of distinct phases that are not separated by a barrier.
  • composition is capable of being pressed or squeezed out of the opened sachet by the user, generally using the fingers.
  • composition for the purpose of this invention, includes cosmetics, thickened shampoos, thickened conditioners, food pastes, creams, lotions, toothpastes and the like.
  • phase exists as a physically distinct entity.
  • Figure-1 represents the front view of a preferred embodiment of a sachet according to the first aspect of the invention.
  • Figure-2 represents the back view of the embodiment shown in figure-1
  • Figure-3 represents the front view of a plurality of connected sachets.
  • Figure-4 illustrates the isometric view of the process for preparing the sachet according to another aspect of the invention .
  • Figure-5 represents the enlarged isometric view of the transverse sealing jaws shown in figure-4. Detailed description of the figures
  • Figure-1 represents the front view of an embodiment of a sachet according to the first aspect of the invention.
  • the sachet 1 comprises a body 2 and two transverse seams; a top transverse seam 3 and a bottom transverse seam 4.
  • the dispensing passage 5 is in the top transverse seam 3.
  • the dispensing passage 5 is off-set from the longitudinal axis of symmetry 6' -6", of the sachet 1. This off-set disposition has been found to give better dispensing and smooth cut-off during the same, as compared to sachets having the dispensing passage, located axially on the top transverse seam.
  • the cross-sectional area of the dispensing passage 5 is less than that of the body 2 and it reduces progressively.
  • the dispensing passage of reduced cross sectional area facilitates dispensing of the product, when the user opens the sachet.
  • Perforations 7 are located entirely within the top transverse seam 3 and adjacent to the dispensing passage 5 so as to ensure that the hermetic seam of the sachet is not endangered. The perforations 7 help in initiating the tearing of sachet so as to open the dispensing passage 5. If the perforations do not pass through the transverse seam, then the transverse seam may interfere with the propagation of the tear required to open the sachet.
  • FIG-2 that represents the back view of the sachet of figure-1, wherein is seen the longitudinal seam 6 of the sachet 1.
  • the longitudinal seam 6 is folded over the top transverse seam 3, and is directed away from dispensing passage 5, where perforations 7 run over the longitudinal seam 6 and the top transverse seam 3.
  • the perforated top transverse seam and the longitudinal seam help the user to initiate the tear to open the sachet with greater ease.
  • top transverse seam 3, bottom transverse seam 4 and the longitudinal seam 6 collectively make-up the three seals of the sachet.
  • Figure-3 represents the front view of a plurality of connected sachets, clearly showing the separator perforations 8 between successive sachets.
  • Figure-4 illustrates the isometric view of the preferred embodiment of the process for preparing the sachet containing the extrudable composition according to another aspect of the invention.
  • the sheet material is un-rolled from a roll (not shown) and is conveyed over conveyors 102 and 103 to the hollow sachet former 104.
  • the sheet material 101 is folded over itself so that the opposite longitudinal edges 101a and 101b are parallely juxtaposed.
  • Longitudinal heat sealers 105 a and 105 b located on either side of the former, then seal the parallely juxtaposed portions of the longitudinal edges 101a and 101b to define the longitudinal seam 106, thereby also converting the sheet material 101 into the hose 107.
  • Guide means 108 located downward of the longitudinal sealers, then guide the longitudinal seam 106 to the direction, away from the dispensing passage so that the longitudinal seam 106 can be subsequently perforated, along with the top transverse seam of the sachet.
  • the open leading edge of the hose 107 is then sealed transversely, with the help of transverse sealing jaws 109a and 109b, located on either side of the hose 107, so as to simultaneously define the top transverse seam of one sachet and bottom transverse seam of the immediately preceding sachet.
  • the sealing jaws 109a and 109b both have a recess 110 (recess in 109b is not shown) which prevents an area of the top transverse seam from getting sealed, this un-sealed area then defines the dispensing passage of the sachet.
  • Product dispensing means (not shown) extends vertically within the sachet former 104 in a radially spaced relationship with the sachet former it is located within the hose 107 of sheet material 101 formed over the product dispensing means.
  • first and second phases are dispensed simultaneously through respective dispensing tubes, each having a nozzle (not shown) .
  • Each tube is in fluid communication with a reservoir of the respective phases, where individual phases enter the dispensing tubes through respective inlet means 113 and 114 disposed above the former 104.
  • the size of the tubes can be suitably adjusted/modified to suit the compositions being dispensed, as each composition has its own unique rheological behavior.
  • This stream of air cuts off the dispensing of phases and also fills up the free space within the sachet.
  • This jet allows for a smooth cut-off of product dispensing, thereby preventing un-wanted dripping of products, pre and post dispensing operation, which also reduces wastage of the composition being filled.
  • the hose 107 is pulled by pullers (not shown) gradually in the vertically downward direction, so as to bring the other open end of the hose 107 between sealing jaws 109a and 109b.
  • the other open end of the hose 107 is then sealed transversely, with the help of transverse sealing jaws 109a and 109b, so as to simultaneously define the bottom transverse seam of the sachet and the top transverse seam of the next sachet.
  • FIG-5 depicting the enlarged isometric view of the transverse sealing jaws 109a and 109b
  • the figure clearly shows the recess 110 in jaw 105a.
  • the shape of this recess and the corresponding recess, present in transverse jaw 105b enable to achieve the profile of the dispensing passage of the sachets that are formed.
  • the recess 110 is offset from the longitudinal axis of symmetry 109' -109" of the transverse jaw 109a.
  • the sealing jaw 109a is also provided with a pneumatically activated cutter 111 that perforates a portion of the top transverse seam and the longitudinal seam, adjacent to the dispensing passage of the sachets being formed.
  • Another pneumatically activated separator cutter 112 forms the separating perforations between successive sachets .
  • the process has been described for preparing three-seal sachets.
  • the process can however, be suitably modified to prepare 4-seal sachets, which are typically made by juxtaposing one or two sheets of material and sealing all the four edges to form a sachet.
  • Such modification is within the scope of the present invention.
  • Three seal sachets are preferred over 4-seal sachets, as three-seal sachets have a generally circular/tubular cross section, which is preferred for filling compositions having plurality of distinct phases .
  • plural of distinct phases is used to include phases that are compositionally and/or visually distinct, a combination thereof being preferred.
  • Non-limiting examples are toothpaste compositions having two cream phases, each being colored differently; a toothpaste composition having a cream phase and a gel phase both having identical colors; a skin care cream having a cream phase and a gel phase, the gel phase being colored differently so as to create enhanced appeal .
  • the extrudable composition is selected from cosmetics, creams, gels, toothpastes, jams, jellies, cheeses, cheese spreads and butter spreads. More preferably, the composition is a personal care composition such as toothpaste or a skin preparation. It is essential that the composition has plurality of (i.e. at least 2) visually distinct phases, which can be achieved e.g. when the individual phases are colored with an effective amount of a coloring agent so that they contrast with each other within the composition. Alternatively, the contrast can be achieved by coloring only one of the phases or by including at least one gel phase and at least one cream-like phase within the composition.
  • the gel phase can be made transparent, which also provides superior aesthetic properties.
  • the overall composition can be in the form of visually attractive configurations where individual phases co-exist so as to define various preferred configurations such as striped, marbled, rectilinear, interrupted striped, check, mottled, veined, clustered, speckled, geometric, spotted, ribbons, helical, swirl, arrayed, variegated, textured, grooved, ridged, waved, sinusoidal, spiral, twisted, curved, cycle, streaks, striated, contoured, anisotropic, laced, weave or woven, basket weave, spotted, and tessellated, co-axial or concentric configuration. More preferably the configuration is selected from the group consisting of striped, geometric, marbled, co-axial or concentric configuration. Further more preferred configuration is the co-axial configuration.
  • the composition includes at least one gel phase and at least one cream-like phase within the composition.
  • a dual phase skin preparation or toothpaste composition comprising a core gel phase and a sheath of cream phase is the most preferred composition.
  • the core phase can preferably form from 10-90% v/v of the composition, while the sheath phase can form from 90-10% by volume. More preferably, the core phase makes up from 10 to 50% v/v of the composition and further more preferably the core makes up from 10% to 20% v/v of the composition, remainder being the sheath phase. It is also possible to have plurality of cores and sheaths.
  • the sheath phase can comprise of stripe or stripes partially contained within the core phase with a portion of the surface of the stripe exposed at the surface of the main body. It is also possible to obtain one phase in the form of core or cores surrounded by the other phase and the other phases can be chosen from opaque phase or transparent gel phase.
  • the gel phase can comprise of stripe or stripes partially contained within the cream phase with a portion of the surface of the stripe exposed at the surface of the main body.
  • the gel phase in the formulation of the invention preferably comprises by weight of the gel phase, abrasives from 4 - 40% by wt. , humectants 1-90%, sweetening agents 0-2%, foaming agents 0-5%, thickening agents 0-20%, binders 0.1-25% and balance water.
  • Gel phase can also advantageously contain dental actives and flavor compounds for freshness delivery at the efficacious levels.
  • the cream phase preferably comprises abrasives from 4-70 %, humectants 1-90%, sweetening agents 0 -2%, foaming agents 0- 5%, thickening agents 0-20%, binders 0.1-25% and balance water, by weight of the opaque phase.
  • the cream phase can also contain dental actives at efficacious levels.
  • the thickening agents, dyes, preservatives and flavors can be added depending upon the product specification.
  • the content of the mobile phase in each of said gel/cream phases can preferably include humectants from 1 to 90%, binders from 0.1 to 40%, foaming agents from 0 to 5 %, flavors from 0 to 2%, buffering agents from 0 to 5%.
  • the abrasives can be preferably selected from chalk, silica or other known abrasives and their combinations.
  • Suitable binders include sodium carboxy methyl cellulose, carrageenans, xanthan gum, guar gum, polymers and combination thereof.
  • composition having plurality of visually distinct phases multiphase such as toothpaste composition
  • toothpaste composition are well known in the art.
  • the configuration of dispensing nozzles can be suitably manipulated during filing operation.
  • Manufacturing techniques for other forms of compositions having plurality of visually distinct phases, such as marbled or variegated compositions are also well known in the art.
  • Preferred dimensions of the sachet are to have a length of from about 5 cm to about 15 cm, more preferably from about 6 cm to about 12 cm, along its longitudinal seam and to have a width of from about 10 mm to about 50 mm, more preferably from about 22 mm to about 35 mm, along its transverse seams.
  • the seams of the sachet preferably have a width of from about 3 mm to 10 mm for the longitudinal seam and from about 3 mm to about 25 mm for the transverse seams.
  • the sachet will generally contain from about 5 to about 60 g of the composition, more preferably from about 8 g to about 3Og, further more preferably from 12g to 25g of the composition .
  • the sachet contains from 30 to 90% by volume, more preferably from 40- 80% by volume and most preferably from 50-70% by volume, composition, the rest being gas.
  • the presence of the gas gives a cushion effect to the composition, thereby preventing un-wanted intermixing during transportation and handling.
  • the sheet material used for making the sachet can preferably be suitably selected from metallic foil materials or appropriate plastics material or any combination of these materials.
  • Laminates can preferably be used as they combine the desirable properties of the films and foils.
  • a metal foil laminate used in place of a film provides low permeability and good decorative appearance.
  • polyethylene terephthalate/low density polyethylene laminate, nylon/low density polyethylene are conventional laminates; the polyethylene is used principally to effect a good heat seal between two adjacent pieces of laminate which form the walls of the sachet, while Aluminum foil, or any other suitable metallic foil, renders the required degree of rigidity and foldablity to the sachet.
  • the laminate material is polyester such as PET, or is a polyolefin such as polypropylene or polyethylene, but it can be any material that is heat sealable and provides a suitable barrier to gas, water and flavor loss.
  • a particularly preferred laminate material comprises 12 micron layer of PET, a 9 micron layer of aluminum, and a 60 micron layer of low density polyethylene, though the materials - 1 !
  • the sachet body portion can be obtained of any suitable deformable material such as monolayer and/or multilayer plastic substrate depending upon the composition to be packed and the end use required.
  • a further preferred laminate comprises 10 micron layer of PET, 15 micron layer of an acid copolymer, 9 micron layer of Aluminum foil, 15 micron layer of acid copolymer and 30 micron layer of low density polyethylene.
  • Thickness of the sachets preferably is between 50 ⁇ and 200 ⁇ , more preferably between 50 ⁇ and 100 ⁇ and still more preferably between 50 ⁇ and 80 ⁇ , this being substantially thinner than the thickness of a standard toothpaste tube, which is typically around 300 microns.
  • sealing means is heat sealing but alternate forms of sealing means such as radio-frequency means, ultrasonic means, induction heating, electrical resistance heating, radiant heat and lasers can also be used, with or without the use of accompanying pressure.
  • Preferred gases used according to the invention are air or Nitrogen, more preferably air.
  • Preferred means for conveying the sheet material include the use of series of tension rollers.
  • Preferred materials of construction of the former include steel, stainless steel, iron, rigid plastic such as Polycarbonates, metals such as Aluminum, more preferably stainless steel.
  • the material selected should be capable of sustaining pressure and should not react with the constituents of the composition.
  • Preferred material of construction of longitudinal sealers and transverse sealing jaws are iron, steel and stainless steel, more preferably stainless steel, that are coated with Teflon.
  • Dispensing tubes are preferably made of flexible plastics selected from LDPE or HDPE, more preferably HDPE.
  • the present invention thus provides a simple and cost effective method of packaging compositions having plurality of distinct phases and also provides a process for making sachets containing a composition comprising plurality of distinct phases.

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Abstract

A gas-filled sachet containing an extrudable composition, said composition comprising plurality of distinct phases that are not separated by a barrier.

Description

GAS-FILLED SACHET
Technical field
The present invention relates to gas-filled sachets containing extrudable compositions.
Background and prior art
Sachets are small packages, which are used for packing single dose or small number of doses of products such as adhesives, lubricants, medicines, cosmetics, shampoos, conditioners, liquid soaps, food pastes, sauces, creams, lotions and dentifrices. Single dose sachets are often used as sample sachets during advertisement and promotion of products and therefore, they have become indispensable sales and marketing tools. Sachets are also very convenient form of packages for sale of new products to consumers, who do not wish to spend more money experimenting with new products, as the cost of the same products sold in conventional packages like a bottle or a jar is comparatively high. Sachets are also convenient to use during travel, when smaller quantities can be carried without spillage.
With the growing concern about inflating packaging costs due to rising raw material cost the need for low-cost product packs is being realized around the globe, and more so in the developing and under-developed nations. Sachets provide a simple, cost-effective and convenient form of packaging for almost all fluid materials. Sachets are preferred by consumers over conventional forms of flexible packs such as laminated tubes and rigid packs such as hand-actuated dispensers especially, for their convenience and cost benefits .
Dual phase or multiphase compositions have the potential of combining two or more functional compositions into a single product that can be applied in one application. However, with any such multiphase composition it is obviously important that the combined product remains functional and effective and that it remains usable over a reasonable product life span. Consumers have recently shown an increasingly diverse sense of appreciation in regard to the value e.g. of cosmetic materials, which are required to possess certain additional merits related to their intrinsic appeal as objects of beauty which provide pleasure in use, in addition to performing the basic functions of being useful and effective.
One particular area of concern is in containerizing and packaging multiphase cosmetic compositions. Generally, each of the phases are dispensed into a separate container such that the respective phases are generally maintained separate, remain stable, and that in viewing the product, each phase, as packaged, appears visually distinct. In addition, in containerizing a multiphase cosmetic composition, it is important that the respective phases comprising the composition be dispensed in a manner such that the particular phases are present and occur throughout the final product such that in gathering a single application from a container, the user is likely to gather an adequate amount of each respective phase. Attempts have been made to containerize multiphase compositions by using partitioned tube packages, which have been described for packaging incompatible compositions. Partitioned tube packages are expensive, require complex manufacturing capabilities and therefore are not suitable for the low-end markets.
Sachets are generally used to deliver a unit dose of a single substance. However, in some instances they have been used to simultaneously dispense doses of two different substances .
FR2696995 (SOCOPLAN SA, 1994) describes sachet packages for liquid, powdered or paste products comprising two containers, one within the other, each containing a different product. This is formed by separately forming a primary and a secondary tube and subsequently inserting the primary tube within the second tube of larger transverse dimension. The second tube is then heat sealed at predetermined intervals opposite the seal of the inner tube to form a series of concentric inner and outer containers. The containers are filled and then cut along the seals to form individual packages.
FR2644141 (ARSENE MICHEL, 1990) describes a device for packaging semi-liquid, creamy and pasty products presented in heat-sealed sachets, discharging the product by folding one part of the sachet over the other after transverse fracture. The invention consists in using a frangible rigid or semi-rigid planar face. This device is used for sachets having one or two compartments and provides for a sachet that can containerize two different compositions.
WO0187736 (COLGATE PALMOLIVE CO, 2001) describes a dual chamber sachet that overcomes the problem of non-uniform dispensing when the sidewalls of the sachet are depressed by the use of a relatively thin intermediate divider wall, rounded corner edges at the lower end of each chamber of the sachet, tapered side edges up to the exit channel of each chamber of the sachet. This structure prevents the downward flow of substances in each chamber during dispensing. The substances are directed upwardly by the rounded lower corners of the sachet, the tapered upper walls and the wide dispensing opening. This relatively wide dispensing opening minimizes the back pressure caused by the substances flowing to a dispensing exit of a width less than that of the product chambers .
The sachet packs described in prior art are suitable for many applications, but the processes involved in making such dual-chambered or partitioned sachets is cumbersome and not economically feasible owing to the multiplicity of operations involved. In effect, the consumer is likely to end-up paying a higher amount, which would offset the benefits of offered by such small packages. Partitioned sachets would require special manufacturing capabilities and machine modifications to form the intermediate dividing wall. These options therefore are not technically and economically viable. Another problem with partitioned sachets is that as the sachet walls are depressed to dispense substances from each chamber of the sachet, some of the substances will be forced downward into areas of corners of the sachet. This substance will not be dispensed. This is the result of the essentially 90° angle to the lower corners, the straight sidewalls and relatively narrow dispensing opening. Further, depending on how the sachet is being held during dispensing, more of the substance in one chamber will flow into the corners than that in another chamber. The result would be non-uniform dispensing.
Thus, there exists a need for packages for multiphase compositions, where the phases are mutually compatible, which packages can cater to the needs of low-end markets and can be made available to consumers at an affordable price.
The present inventors have devised a solution to the problem of packaging compositions having a plurality of distinct phases in small packages, while avoiding the use of multicompartment packages, thereby providing significant technical advancement over packages for multiphase compositions described in prior art. The inventors have also offered a cost-effective means of packaging multiphase compositions, which packages are also able to withstand the rigors of transportation and handling, thereby providing significant economic benefits, both to the manufacturers and the consumers .
The present inventors have found that compositions having plurality of visually distinct phases can be advantageously packed in gas-filled sachets. Objects of the invention
It is therefore, an object of the present invention to provide an easy and cost effective method of packaging compositions having plurality of distinct phases. Another object of the present invention is to provide a process for making sachets containing a composition comprising plurality of visually distinct phases.
Summary of the invention According to one aspect, the present invention relates to a gas-filled sachet containing an extrudable composition, said composition comprising plurality of distinct phases that are not separated by a barrier.
Preferably, the phases are compositionally and/or visually distinct .
According to a further preferred aspect the sachet comprises a dispensing passage of reduced cross sectional area with respect to the body of the sachet.
According to another aspect, the present invention relates to a process for preparing a gas-filled sachet containing an extrudable composition comprising plurality of distinct phases, said process comprising the steps of: a. conveying a sheet material to a sachet former where the opposite longitudinal edges of the material are overlapped and parallely juxtaposed; b. sealing said overlapping longitudinal edges of said sheet material, form a hose where said sealed edges define the longitudinal seam of the sachet; c. sealing the leading edge of said hose by a first transverse seal to form the top transverse seam of the sachet to define a dispensing passage where the dispensing passage is defined by the seal on either side of the passage but the seal runs across the transverse edge above the dispensing passage in order to close said passage; d. filling said extrudable composition comprising plurality of distinct phases through a filling means, followed by a stream of gas, which stops the filling action and fills in the free space within the sachet; e. sealing the other open end of said hose at a desired location in a second transverse sealing, said sealing defines the bottom transverse seam of the sachet.
The invention will now be described in the detail.
Detailed description
According to one aspect, the present invention relates to a gas-filled sachet containing an extrudable composition, said composition comprising plurality of distinct phases that are not separated by a barrier.
The term "extrudable" means that the composition is capable of being pressed or squeezed out of the opened sachet by the user, generally using the fingers.
The term "composition", for the purpose of this invention, includes cosmetics, thickened shampoos, thickened conditioners, food pastes, creams, lotions, toothpastes and the like.
By the term "plurality of distinct phases" is meant that the phases within the composition occupy separate and distinct physical spaces but are in direct contact with one another (i.e., they are not separated by a barrier and they are not intermixed to any significant degree) . Each phase exists as a physically distinct entity.
The invention will now be described with the help of following figures, which represent non-limiting embodiments of the aspects of the invention.
Brief description of figures
Figure-1 represents the front view of a preferred embodiment of a sachet according to the first aspect of the invention.
Figure-2 represents the back view of the embodiment shown in figure-1
Figure-3 represents the front view of a plurality of connected sachets.
Figure-4 illustrates the isometric view of the process for preparing the sachet according to another aspect of the invention .
Figure-5 represents the enlarged isometric view of the transverse sealing jaws shown in figure-4. Detailed description of the figures
Figure-1 represents the front view of an embodiment of a sachet according to the first aspect of the invention. In this figure, the sachet 1 comprises a body 2 and two transverse seams; a top transverse seam 3 and a bottom transverse seam 4. The dispensing passage 5 is in the top transverse seam 3. As is evident from figure-1, the dispensing passage 5 is off-set from the longitudinal axis of symmetry 6' -6", of the sachet 1. This off-set disposition has been found to give better dispensing and smooth cut-off during the same, as compared to sachets having the dispensing passage, located axially on the top transverse seam. The cross-sectional area of the dispensing passage 5 is less than that of the body 2 and it reduces progressively. The dispensing passage of reduced cross sectional area facilitates dispensing of the product, when the user opens the sachet. Perforations 7 are located entirely within the top transverse seam 3 and adjacent to the dispensing passage 5 so as to ensure that the hermetic seam of the sachet is not endangered. The perforations 7 help in initiating the tearing of sachet so as to open the dispensing passage 5. If the perforations do not pass through the transverse seam, then the transverse seam may interfere with the propagation of the tear required to open the sachet.
Referring to figure-2 that represents the back view of the sachet of figure-1, wherein is seen the longitudinal seam 6 of the sachet 1. The longitudinal seam 6 is folded over the top transverse seam 3, and is directed away from dispensing passage 5, where perforations 7 run over the longitudinal seam 6 and the top transverse seam 3. The perforated top transverse seam and the longitudinal seam help the user to initiate the tear to open the sachet with greater ease.
The top transverse seam 3, bottom transverse seam 4 and the longitudinal seam 6, collectively make-up the three seals of the sachet.
Figure-3 represents the front view of a plurality of connected sachets, clearly showing the separator perforations 8 between successive sachets.
Figure-4 illustrates the isometric view of the preferred embodiment of the process for preparing the sachet containing the extrudable composition according to another aspect of the invention. In this figure, the sheet material is un-rolled from a roll (not shown) and is conveyed over conveyors 102 and 103 to the hollow sachet former 104. On the former, the sheet material 101 is folded over itself so that the opposite longitudinal edges 101a and 101b are parallely juxtaposed. Longitudinal heat sealers 105 a and 105 b, located on either side of the former, then seal the parallely juxtaposed portions of the longitudinal edges 101a and 101b to define the longitudinal seam 106, thereby also converting the sheet material 101 into the hose 107. Guide means 108, located downward of the longitudinal sealers, then guide the longitudinal seam 106 to the direction, away from the dispensing passage so that the longitudinal seam 106 can be subsequently perforated, along with the top transverse seam of the sachet. The open leading edge of the hose 107 is then sealed transversely, with the help of transverse sealing jaws 109a and 109b, located on either side of the hose 107, so as to simultaneously define the top transverse seam of one sachet and bottom transverse seam of the immediately preceding sachet. The sealing jaws 109a and 109b, both have a recess 110 (recess in 109b is not shown) which prevents an area of the top transverse seam from getting sealed, this un-sealed area then defines the dispensing passage of the sachet. Product dispensing means (not shown) extends vertically within the sachet former 104 in a radially spaced relationship with the sachet former it is located within the hose 107 of sheet material 101 formed over the product dispensing means.
After the first transverse sealing operation, desired amounts of first and second phases are dispensed simultaneously through respective dispensing tubes, each having a nozzle (not shown) . Each tube is in fluid communication with a reservoir of the respective phases, where individual phases enter the dispensing tubes through respective inlet means 113 and 114 disposed above the former 104. The size of the tubes can be suitably adjusted/modified to suit the compositions being dispensed, as each composition has its own unique rheological behavior. After the desired amounts of first and second phases are dispensed, a stream of air is purged into the sachet through the air inlet tube (not shown) which communicates with the air inlet means 115. This stream of air cuts off the dispensing of phases and also fills up the free space within the sachet. This jet allows for a smooth cut-off of product dispensing, thereby preventing un-wanted dripping of products, pre and post dispensing operation, which also reduces wastage of the composition being filled. As the first and second phases are dispensed, the hose 107 is pulled by pullers (not shown) gradually in the vertically downward direction, so as to bring the other open end of the hose 107 between sealing jaws 109a and 109b. The other open end of the hose 107 is then sealed transversely, with the help of transverse sealing jaws 109a and 109b, so as to simultaneously define the bottom transverse seam of the sachet and the top transverse seam of the next sachet.
Referring now to figure-5 depicting the enlarged isometric view of the transverse sealing jaws 109a and 109b, the figure clearly shows the recess 110 in jaw 105a. The shape of this recess and the corresponding recess, present in transverse jaw 105b enable to achieve the profile of the dispensing passage of the sachets that are formed. As seen in the figure, the recess 110 is offset from the longitudinal axis of symmetry 109' -109" of the transverse jaw 109a. The sealing jaw 109a is also provided with a pneumatically activated cutter 111 that perforates a portion of the top transverse seam and the longitudinal seam, adjacent to the dispensing passage of the sachets being formed. Another pneumatically activated separator cutter 112 forms the separating perforations between successive sachets .
The process has been described for preparing three-seal sachets. The process can however, be suitably modified to prepare 4-seal sachets, which are typically made by juxtaposing one or two sheets of material and sealing all the four edges to form a sachet. Such modification is within the scope of the present invention. Three seal sachets are preferred over 4-seal sachets, as three-seal sachets have a generally circular/tubular cross section, which is preferred for filling compositions having plurality of distinct phases .
The term "plurality of distinct phases" is used to include phases that are compositionally and/or visually distinct, a combination thereof being preferred. Non-limiting examples are toothpaste compositions having two cream phases, each being colored differently; a toothpaste composition having a cream phase and a gel phase both having identical colors; a skin care cream having a cream phase and a gel phase, the gel phase being colored differently so as to create enhanced appeal .
Preferably, the extrudable composition is selected from cosmetics, creams, gels, toothpastes, jams, jellies, cheeses, cheese spreads and butter spreads. More preferably, the composition is a personal care composition such as toothpaste or a skin preparation. It is essential that the composition has plurality of (i.e. at least 2) visually distinct phases, which can be achieved e.g. when the individual phases are colored with an effective amount of a coloring agent so that they contrast with each other within the composition. Alternatively, the contrast can be achieved by coloring only one of the phases or by including at least one gel phase and at least one cream-like phase within the composition. The gel phase can be made transparent, which also provides superior aesthetic properties. The overall composition can be in the form of visually attractive configurations where individual phases co-exist so as to define various preferred configurations such as striped, marbled, rectilinear, interrupted striped, check, mottled, veined, clustered, speckled, geometric, spotted, ribbons, helical, swirl, arrayed, variegated, textured, grooved, ridged, waved, sinusoidal, spiral, twisted, curved, cycle, streaks, striated, contoured, anisotropic, laced, weave or woven, basket weave, spotted, and tessellated, co-axial or concentric configuration. More preferably the configuration is selected from the group consisting of striped, geometric, marbled, co-axial or concentric configuration. Further more preferred configuration is the co-axial configuration.
Preferably, the composition includes at least one gel phase and at least one cream-like phase within the composition. A dual phase skin preparation or toothpaste composition comprising a core gel phase and a sheath of cream phase is the most preferred composition. The core phase can preferably form from 10-90% v/v of the composition, while the sheath phase can form from 90-10% by volume. More preferably, the core phase makes up from 10 to 50% v/v of the composition and further more preferably the core makes up from 10% to 20% v/v of the composition, remainder being the sheath phase. It is also possible to have plurality of cores and sheaths. Alternatively, the sheath phase can comprise of stripe or stripes partially contained within the core phase with a portion of the surface of the stripe exposed at the surface of the main body. It is also possible to obtain one phase in the form of core or cores surrounded by the other phase and the other phases can be chosen from opaque phase or transparent gel phase. Alternatively, the gel phase can comprise of stripe or stripes partially contained within the cream phase with a portion of the surface of the stripe exposed at the surface of the main body.
The gel phase in the formulation of the invention preferably comprises by weight of the gel phase, abrasives from 4 - 40% by wt. , humectants 1-90%, sweetening agents 0-2%, foaming agents 0-5%, thickening agents 0-20%, binders 0.1-25% and balance water. Gel phase can also advantageously contain dental actives and flavor compounds for freshness delivery at the efficacious levels.
The cream phase preferably comprises abrasives from 4-70 %, humectants 1-90%, sweetening agents 0 -2%, foaming agents 0- 5%, thickening agents 0-20%, binders 0.1-25% and balance water, by weight of the opaque phase. The cream phase can also contain dental actives at efficacious levels.
The thickening agents, dyes, preservatives and flavors can be added depending upon the product specification.
The content of the mobile phase in each of said gel/cream phases can preferably include humectants from 1 to 90%, binders from 0.1 to 40%, foaming agents from 0 to 5 %, flavors from 0 to 2%, buffering agents from 0 to 5%.
The abrasives can be preferably selected from chalk, silica or other known abrasives and their combinations. Suitable binders include sodium carboxy methyl cellulose, carrageenans, xanthan gum, guar gum, polymers and combination thereof.
It is possible to obtain varied combinations/arrangements of gel-cream phases with desired stability and cleansing/polishing property and desired functional efficacy and all such combinations are within the scope of the present invention.
The process for manufacture of the composition having plurality of visually distinct phases multiphase, according to the invention, such as toothpaste composition are well known in the art. For obtaining striped multiphase toothpaste the configuration of dispensing nozzles can be suitably manipulated during filing operation. Manufacturing techniques for other forms of compositions having plurality of visually distinct phases, such as marbled or variegated compositions are also well known in the art.
Preferred dimensions of the sachet are to have a length of from about 5 cm to about 15 cm, more preferably from about 6 cm to about 12 cm, along its longitudinal seam and to have a width of from about 10 mm to about 50 mm, more preferably from about 22 mm to about 35 mm, along its transverse seams. The seams of the sachet preferably have a width of from about 3 mm to 10 mm for the longitudinal seam and from about 3 mm to about 25 mm for the transverse seams.
The sachet will generally contain from about 5 to about 60 g of the composition, more preferably from about 8 g to about 3Og, further more preferably from 12g to 25g of the composition .
Preferably, the sachet contains from 30 to 90% by volume, more preferably from 40- 80% by volume and most preferably from 50-70% by volume, composition, the rest being gas. The presence of the gas gives a cushion effect to the composition, thereby preventing un-wanted intermixing during transportation and handling.
The sheet material used for making the sachet can preferably be suitably selected from metallic foil materials or appropriate plastics material or any combination of these materials. Laminates can preferably be used as they combine the desirable properties of the films and foils. A metal foil laminate used in place of a film provides low permeability and good decorative appearance. For example polyethylene terephthalate/low density polyethylene laminate, nylon/low density polyethylene are conventional laminates; the polyethylene is used principally to effect a good heat seal between two adjacent pieces of laminate which form the walls of the sachet, while Aluminum foil, or any other suitable metallic foil, renders the required degree of rigidity and foldablity to the sachet. Preferably, the laminate material is polyester such as PET, or is a polyolefin such as polypropylene or polyethylene, but it can be any material that is heat sealable and provides a suitable barrier to gas, water and flavor loss. A particularly preferred laminate material comprises 12 micron layer of PET, a 9 micron layer of aluminum, and a 60 micron layer of low density polyethylene, though the materials - 1 !
utilized can preferably comprise a 5-15 micron layer of PET, a 5-15 micron layer of aluminum, and a 40-80 micron layer of low density polyethylene. However, and depending on the end use of the sachet, the sachet body portion can be obtained of any suitable deformable material such as monolayer and/or multilayer plastic substrate depending upon the composition to be packed and the end use required. A further preferred laminate comprises 10 micron layer of PET, 15 micron layer of an acid copolymer, 9 micron layer of Aluminum foil, 15 micron layer of acid copolymer and 30 micron layer of low density polyethylene.
Thickness of the sachets preferably is between 50 μ and 200 μ, more preferably between 50 μ and 100 μ and still more preferably between 50 μ and 80 μ, this being substantially thinner than the thickness of a standard toothpaste tube, which is typically around 300 microns.
Preferred sealing means is heat sealing but alternate forms of sealing means such as radio-frequency means, ultrasonic means, induction heating, electrical resistance heating, radiant heat and lasers can also be used, with or without the use of accompanying pressure.
Preferred gases used according to the invention are air or Nitrogen, more preferably air.
Preferred means for conveying the sheet material include the use of series of tension rollers. Preferred materials of construction of the former include steel, stainless steel, iron, rigid plastic such as Polycarbonates, metals such as Aluminum, more preferably stainless steel. The material selected should be capable of sustaining pressure and should not react with the constituents of the composition.
Preferred material of construction of longitudinal sealers and transverse sealing jaws are iron, steel and stainless steel, more preferably stainless steel, that are coated with Teflon.
Dispensing tubes are preferably made of flexible plastics selected from LDPE or HDPE, more preferably HDPE. The present invention thus provides a simple and cost effective method of packaging compositions having plurality of distinct phases and also provides a process for making sachets containing a composition comprising plurality of distinct phases.

Claims

We claim :
1. A gas-filled sachet containing an extrudable composition, said composition comprising plurality of distinct phases that are not separated by a barrier.
2. A gas-filled sachet as claimed in claim 1 wherein said phases are compositionally distinct.
3. A gas-filled sachet as claimed in any preceding claim wherein said phases are visually distinct.
4. A gas-filled sachet as claimed in any preceding claim wherein said sachet is a three-seal sachet having a longitudinal seam and two transverse seams.
5. A gas-filled sachet as claimed in any preceding claim wherein said sachet comprises a dispensing passage of reduced cross sectional area with respect to the body of said sachet, at one of the transverse seams.
6. A gas-filled sachet as claimed in claim 5 wherein said dispensing passage is offset from the longitudinal axis of said sachet.
7. A gas-filled sachet as claimed in claim 5 or 6, wherein said transverse seam comprising the dispensing passage is provided with means to enable easy tearing of the seam such as a notch, perforations or a tab.
8. A gas-filled sachet as claimed in claim 7, wherein said means is perforations.
9. A gas-filled sachet as claimed in claims 7 or 8, wherein said perforations are on either side of the dispensing passage .
10. A gas-filled sachet as claimed in any preceding claim wherein said plurality of distinct phases are disposed in co-axial, concentric, striped, variegated, marbled or spiral configuration.
11. A gas-filled sachet as claimed in claim 10 wherein said plurality of distinct phases are disposed in co-axial configuration.
12. A gas-filled sachet as claimed in any preceding claim wherein said extrudable composition is a personal care composition .
13. A gas-filled sachet as claimed in claim 12 wherein said personal care composition comprises a cream phase and a gel phase.
14. A gas-filled sachet as claimed in any one of the preceding claims wherein the sachet contains from 30% to 90% by volume, extrudable composition.
15. A process for preparing a gas-filled sachet containing an extrudable composition comprising plurality of distinct phases, said process comprising the steps of: a. conveying a sheet material to a sachet former where the opposite longitudinal edges of the material are overlapped and parallely juxtaposed; b. sealing said overlapping longitudinal edges of said sheet material, form a hose where said sealed edges define the longitudinal seam of the sachet; c. sealing the leading edge of said hose by a first transverse seal to form the top transverse seam of the sachet to define a dispensing passage where the dispensing passage is defined by the seal on either side of the passage but the seal runs across the transverse edge above the dispensing passage in order to close said passage; d. filling said extrudable composition comprising plurality of distinct phases through a filling means, followed by a stream of gas, which stops the filling action and fills in the free space within the sachet; e. sealing the other open end of said hose at a desired location in a second transverse sealing, said sealing defines the bottom transverse seam of the sachet.
16. A process as claimed in claim 15 wherein sealing is done by sealing jaws.
17. A process as claimed in claim 16 wherein said longitudinal and said transverse edges are sealed by longitudinal sealing jaws and said first and second transverse sealing is performed using top and bottom transverse sealing jaws, respectively.
18. A process as claimed in claim 17 wherein said top transverse sealing jaws are provided with recesses that match the shape and configuration of the dispensing passage .
19. A process as claimed in claim 17 or 18, wherein said first and second transverse sealing is performed using one pair of sealing jaws, which simultaneously defines the top transverse seam of one sachet and bottom transverse seam of the preceding sachet, said sealing jaws being provided with recesses that match the shape and configuration of the dispensing passage.
20. A process as claimed in claims 15 to 19 wherein said filling means is a nozzle, introduced through said other open end.
21. A process as claimed in claims 15 to 20, wherein said hose is pulled downward, as said extrudable composition is filled, so as to bring said other open end between said transverse sealing jaws to form the bottom transverse seam.
22. A process as claimed in claims 16 to 21, wherein said sealing jaws include a cutter that perforates the top transverse seam on either side of the dispensing passage .
23. A gas-filled sachet containing an extrudable composition comprising plurality of distinct phases, substantially as herein described with reference to the accompanying figures and examples.
24. A process for preparing a gas-filled sachet containing an extrudable composition comprising plurality of distinct phases, substantially as herein described with reference to the figures and examples.
PCT/EP2007/052093 2006-04-04 2007-03-06 Gas-filled sachet WO2007113066A1 (en)

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