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GB2385046A - Packaging tray and method of manufacture - Google Patents

Packaging tray and method of manufacture Download PDF

Info

Publication number
GB2385046A
GB2385046A GB0200362A GB0200362A GB2385046A GB 2385046 A GB2385046 A GB 2385046A GB 0200362 A GB0200362 A GB 0200362A GB 0200362 A GB0200362 A GB 0200362A GB 2385046 A GB2385046 A GB 2385046A
Authority
GB
United Kingdom
Prior art keywords
layer
tray
base portion
laminate
heat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB0200362A
Other versions
GB2385046B (en
GB0200362D0 (en
Inventor
Stuart Hinchliffe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CHITTY GROUP
Original Assignee
CHITTY GROUP
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 CHITTY GROUP filed Critical CHITTY GROUP
Priority to GB0200362A priority Critical patent/GB2385046B/en
Publication of GB0200362D0 publication Critical patent/GB0200362D0/en
Publication of GB2385046A publication Critical patent/GB2385046A/en
Application granted granted Critical
Publication of GB2385046B publication Critical patent/GB2385046B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/826—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined
    • B29C66/8266—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined using fluid pressure directly acting on the parts to be joined
    • B29C66/82661—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps without using a separate pressure application tool, e.g. the own weight of the parts to be joined using fluid pressure directly acting on the parts to be joined by means of vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • B32B7/027—Thermal properties
    • 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
    • B29C65/02—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
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30—Electrical means
    • B29C65/305—Electrical means involving the use of cartridge heaters
    • 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
    • B29C65/44—Joining a heated non plastics element to a plastics element
    • 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
    • B29C66/001—Joining in special atmospheres
    • 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
    • B29C66/006—Preventing damaging, e.g. 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
    • B29C66/01—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
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B29C66/1312—Single flange to flange joints, the parts to be joined being rigid
    • 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow bottoms to open ends of container bodies
    • 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
    • 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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/731—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the intensive physical properties of the material of the parts to be joined
    • B29C66/7311—Thermal properties
    • B29C66/73115—Melting point
    • B29C66/73116—Melting point of different melting point, i.e. the melting point of one of the parts to be joined being different from the melting point 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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • 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
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
    • 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
    • B29C66/816—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 mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8161—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 mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material
    • 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
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8242—Pneumatic or hydraulic drives
    • 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
    • B29C66/83—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
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91411—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B29C66/9192—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams
    • B29C66/91921—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature
    • B29C66/91931—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature in explicit relation to the fusion temperature or melting point of the material of one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
    • B65B31/02—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas
    • B65B31/025—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas specially adapted for rigid or semi-rigid containers
    • B65B31/028—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas specially adapted for rigid or semi-rigid containers closed by a lid sealed to the upper rim of the container, e.g. tray-like container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • 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
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • B29C65/7847—Holding or clamping means for handling purposes using vacuum to hold at least one 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
    • 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
    • B29C66/7234—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 barrier layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Plasma & Fusion (AREA)
  • Packages (AREA)
  • Laminated Bodies (AREA)

Abstract

A packaging tray (2) comprises a base portion (6) of aluminium foil and a cover portion (12) overlying the base portion and sealed in contact with the base portion at a periphery thereof. The cover portion (12) comprises a plastics laminate having at least first (16) and second (18) layers. The first layer (16) is of a material having a lower melting point than a material of the second layer (18). The cover portion (12) is arranged with the first layer of the laminate in contact with, and adhered by heat-sealing to, the base portion (6). Apparatus for heat-sealing the cover portion (12) to the tray (2) is disclosed (Figs 2 and 3).

Description

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PACKAGING TRAY AND METHOD OF MANUFACTURE This invention relates to a packaging tray, particularly but not exclusively for food, and to a method of manufacturing a packaging tray.
Requirements exist for a packaging tray, particularly for food, in which an aluminium foil tray base is provided with a plastics cover, particularly but not exclusively of domed form, and wherein a substantially gas-tight seal is formed between the cover and the tray base around a periphery thereof.
Attempts to heat-seal a cover, formed from a thermoplastics material, to an aluminium foil tray base have hitherto been unsuccessful. Heat applied to the cover results in undesirable deformation and damage to the cover and an inability to form a gas-tight seal between the cover and the aluminium foil tray base.
It is an object of the present invention to overcome or minimise this problem.
According to one aspect of the present invention there is provided a packaging tray comprising a base portion comprising aluminium foil and a cover portion overlying
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the base portion and sealed in contact with the base portion at a periphery thereof, the cover portion comprising a plastics laminate having at least first and second layers, the first layer being of a material having a lower melting point than a material of the second layer, the cover portion being arranged with the first layer of the laminate in contact with, and adhered by heat-sealing to, the base portion.
According to another aspect of the present invention there is provided a method of manufacturing a packaging tray comprising : providing a base portion comprising aluminium foil; providing a cover portion comprising a plastics laminate having at least first and second layers, the first layer being of a material having a lower melting point than a material of the second layer; arranging the cover portion overlying the base portion with the first layer of the laminate located in contact with the base portion at a periphery of the base portion; and adhering, by heat-sealing, the first layer of the laminate to the periphery of the base portion.
The heat-sealing is suitably effected by application of heat to cause softening, at least to a state of tackiness and optionally to a state of melting, of the material of the first layer of the laminate in contact with the base
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portion, without causing deformation or damage to the material of the second layer of the laminate.
Such application of heat may be effected locally to the first layer of the laminate where in contact with the base portion and may be applied by thermal conduction through the base portion.
Pressure may be applied to urge the cover portion into contact with the base portion during heat-sealing.
The packaging tray may be evacuated, and optionally backfilled with a gas, prior to heat-sealing.
The base portion may include a recessed portion, having one or more compartments, and a flange-like peripheral portion.
The cover portion may be substantially flat, or may be domed. When domed, the cover portion may be flanged at its periphery to contact the base portion.
The material of the first layer of the laminate may have a melting point between about 100 degrees Celsius and about 110 degrees Celsius and the material of the second
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layer of the laminate may have a melting point between about 120 degrees Celsius and about 220 degrees Celsius.
The first layer of the plastics laminate may comprise an ethylene acid copolymer having ionic bonding between polymer chains. Acid groups in such copolymer may be partially neutralised, such as with either zinc or sodium ions.
Alternatively, the first layer of the plastics laminate may comprise a co-extruded film of one or more layers of low-density polyethylene and a layer of polyethylene coacrylic acid.
The second layer of the plastics laminate may comprise polyvinyl chloride, or amorphous polyethylene terephthalate, or crystalline polyethylene terephthalate.
The cover portion may be transparent and may be coloured or uncoloured.
The packaging tray may be utilised to package a food item.
By means of the present invention a packaging tray is provided, particularly for a food item, in which an
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efficient substantially gas-tight seal is obtained between the plastics cover portion and the aluminium foil base portion by locally melting only the material of the lower-melting-point first layer of the plastics laminate, such as by applying heat through the aluminium foil base portion, without affecting the higher-melting-point second layer of the plastics laminate. The cover portion and the base portions are themselves substantially impermeable to air and water vapour.
For a better understanding of the present invention and to show more clearly how it may be carried into effect, reference will now be made, by way of example, to the accompanying drawings in which: Figure 1 is a cross-sectional view of an embodiment of a packaging tray according to the present invention; Figure 2 is a part-cross-sectional view of an embodiment of apparatus, in an open position, for use in a method of manufacturing the packaging tray of Figure 1; Figure 3 is a part-cross-sectional view of the apparatus of Figure 2 in a closed position; and
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Figure 4 is a cross-sectional view of an alternative embodiment of a packaging tray according to the present invention.
Referring to Figure 1, a packaging tray 2, such as for a food item 4, comprises a base portion 6 of aluminium foil, having a recess 8 forming one or more compartments for receiving the food item 4, and having a flange-like peripheral portion 10. A domed cover portion 12 is provided, having a flanged peripheral region 14 which interfaces with the flange-like peripheral portion 10 of the base portion 6.
The cover portion 12 comprises a plastics laminate having at least two layers and particularly an inner first layer 16 and an outer second layer 18. The inner first layer 16 comprises a material having a lower melting point than a material comprising the outer second layer 18. The cover portion 12 is arranged with the first layer 16 of the laminate in contact with the flange-like peripheral portion 10 of the aluminium foil base portion 6 and with the cover portion 12 heat-sealed to the base portion 6.
The cover portion 12 is heat-sealed to the base portion 6 by applying heat locally to the first layer 16 of the laminate at the region of contact between the flange-like peripheral portion 10 of the aluminium foil base portion
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6 and the flanged peripheral region 14 of the cover portion 12. Such heat is suitably applied to the aluminium foil base portion 6, particularly at the flange-like peripheral portion 10 thereof, and is conducted through the aluminium flange-like peripheral portion 10 to the material of the first layer 16 of the laminate forming the cover portion 12. The applied heat is such as to cause the material of the first layer 16 of the laminate to locally soften, at least to a state of tackiness, and optionally to a state of melting, without any significant softening or deformation of the material of the second layer 18 of the laminate occurring. A substantially gas-tight seal is thereby formed by heat fusion of the first layer 16 of the laminate to the aluminium foil base portion 6 and, after cooling, the cover portion 12 is securely adhered to the base portion 6.
During the application of heat, pressure is also suitably applied to urge together the cover portion 12 and the base portion 6.
The interior of the packaging tray 2 may be evacuated, and optionally back-filled with a gas, during the heatsealing operation.
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The cover portion 12 may be transparent and may be coloured or uncoloured.
The first and second layers 16,18 forming the cover portion 12 may comprise any combination of plastics materials capable of being laminated together and thermoformed to provide the necessary shape for the cover portion 12 and having the essential differential of melting points. The first layer 16 is also required to satisfactorily adhere to and seal to the aluminium foil base portion 6.
The material of the first layer 16 may suitably have a melting point between about 100 degrees Celsius and about 110 degrees Celsius and the material of the second layer 18 may suitably have a melting point between about 120 degrees Celsius and about 220 degrees Celsius.
The second layer 18 of the plastics laminate suitably comprises polyvinyl chloride, or amorphous or crystalline polyethylene terephthalate. A suitable polyvinyl chloride (PVC) material is available from Vulcaflex S. p. A under the product reference Tecnovil (Registered Trade Mark) 21TV319TRSOOOOO.
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A suitable amorphous polyethylene terephthalate (APET) material is Caroclear AGL10, supplied by Carolex.
The first layer 16 of the plastics laminate may comprise an ethylene acid copolymer material having ionic bonding between polymer chains. Acid groups in such copolymer are suitably partially neutralised with either zinc or sodium ions. Such a material is available from Du Pont under the name Surlyn (Registered Trade Mark).
Alternatively, the first layer 16 of the plastics laminate may comprise a co-extruded film material of one or more layers of low density polyethylene (LD) and a layer of polyethylene coacrylic acid (EEA). Such a film material, comprising two layers of low density polyethylene (LD) and one layer of polyethylene coacrylic acid (EEA) is available from British Polythene Limited (bpi. films) as product reference YZ111.
The formation of the sealed packaging tray 2, from the aluminium foil base portion 6 and the cover portion 12, is suitably carried out by apparatus 20 as shown in Figures 2 and 3.
The apparatus 20 comprises a base 22 with upstanding shafts 24,26. An air cylinder 28, mounted on a top
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plate 30, operates by way of a shaft 32 to lower and raise a top support plate 34 and a clamp block 36 on the shafts 24,26, by way of bearing means 38.
A packaging tray support plate 40, with adjustable collar means 42, is slidable on the shafts 24, 26 onto springs 44,46.
The aluminium foil base portion 6 of the packaging tray 2 is located in the tray support plate 40. The food item 4 to be packaged is placed in the base portion 6 and the domed cover portion 12 of the packaging tray is then located overlying the base portion 6, such that the flanged peripheral region 14 (Figure 1) of the cover plate 12 is in contact with the flange-like peripheral portion 10 (Figure 1) of the base portion 6.
Air is supplied to the air cylinder 28, by way of an upper air feed 48, to lower the top support plate 34 and the clamp block 36 onto the tray support plate 40. At this point the air is turned off. The assembly of the aluminium foil base portion 6 and the cover portion 12 is now inside a sealed chamber 60 (Figure 3), formed by a combination of the tray support plate 40 and a sealing frame 62 with 0-ring seals 64 (Figure 2), secured to, or forming part of, the clamp block 36. However such
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assembly of the base portion 6 and the cover portion 12 is not in contact with an upstand 52 of a heated block 54 (to be described in more detail hereinafter).
Vacuum is applied by way of pipes 66,68 to lift the cover portion 12 by about 2 to 3 mm and to evacuate the chamber 60. Gas, such as cryogenic oxygen and/or carbon dioxide vapour is then fed into the chamber 60 at an inlet 72, the combination of the vacuum and gas resulting in all air being removed from the chamber 60. The pressure inside the chamber 60 is then adjusted to atmospheric pressure.
Air is now supplied at high pressure to the air cylinder 28, through the upper feed 48. The springs 44,46 beneath the tray support plate 40 are compressed by movement of the tray support plate 40. This causes lowering of the top support plate 34, the clamp block 36 and the tray support plate 40 until the domed cover portion 12 and the aluminium foil base portion 6 of the packaging tray 2 are urged together at their peripheral regions 10,14 (Figure 1) between the clamp block 36 and the upstand 52 of the heated block 54. The tray support plate 40 seals around the upstand 52 by way of 0-ring seals 50. The heated block 54 is electrically heated by means of a heating element 56 provided with an electrical
<Desc/Clms Page number 12>
connector 58. Heat is applied, by conduction through the aluminium foil material of the base portion 6, from the heated block 54 to the lower melting point first layer 16 of the laminate forming the cover portion 12 (Figure 1).
The first layer 16 locally melts where in contact with the aluminium foil base portion 6 at the flange-like peripheral portion 10 thereof, and forms an adherent gastight seal. The higher melting point second layer 18 of the laminate forming the cover portion 12 is unaffected during this operation.
The air pressure applied to the air cylinder 28 is now changed, such that it is applied to a lower feed line 70. As a result, the top support plate 34 and the clamp block 36 are raised and the tray support plate 40 is also raised, by the springs 44,46, from the heated block 54.
The finished assembled and sealed packaging tray 2 can then be removed from the apparatus.
The apparatus 20 can be fully automated whereby the tray support plate 40 comprises a rotary carousel, or a sliding shuttle arrangement with more than one aperture (not shown). Base portions 6, having food items 4 and with cover portions 12 in place, could be fed into the apparatus and then onto a conveyor belt (not shown).
<Desc/Clms Page number 13>
Although the present invention has been specifically described with reference to a packaging tray 2 having a domed cover portion 12, it could equally be applied to a packaging tray 2A having a base portion 6A with a flat cover portion 12A comprising first and second layers 16A, 18A, as shown in Figure 4. Apart from the cover portion 12A being flat, materials and processing operations are substantially the same as for the packaging tray 2 and apparatus 20 of Figures 1,2 and 3.

Claims (40)

  1. CLAIMS 1. A packaging tray comprising a base portion comprising aluminium foil and a cover portion overlying the base portion and sealed in contact with the base portion at a periphery thereof, the cover portion comprising a plastics laminate having at least first and second layers, the first layer being of a material having a lower melting point than a material of the second layer, the cover portion being arranged with the first layer of the laminate in contact with, and adhered by heat-sealing to, the base portion.
  2. 2. A tray as claimed in claim 1, wherein the heatsealing is effected by application of heat to cause softening, at least to a state of tackiness, of the material of the first layer of the laminate in contact with the base portion, without causing deformation or damage to the material of the second layer of the laminate.
  3. 3. A tray as claimed in claim 2, wherein the heatsealing is effected by the application of heat to cause softening to a state of melting.
    <Desc/Clms Page number 15>
  4. 4. A tray as claimed in claim 2 or 3, wherein the application of heat is effected locally to the first layer of the laminate where in contact with the base portion.
  5. 5. A tray as claimed in claim 4, wherein the heat is applied by thermal conduction through the base portion.
  6. 6. A tray as claimed in any preceding claim, wherein pressure is applied to urge the cover portion into contact with the base portion during heat-sealing.
  7. 7. A tray as claimed in any preceding claim, wherein the tray is evacuated prior to heat-sealing.
  8. 8. A tray as claimed in claim 7, wherein the tray is back-filled with a gas prior to heat-sealing.
  9. 9. A tray as claimed in any preceding claim, wherein the base portion includes a recessed portion, having one or more compartments, and a flange-like peripheral portion.
  10. 10. A tray as claimed in any preceding claim, wherein the cover portion is substantially flat.
    <Desc/Clms Page number 16>
  11. 11. A tray as claimed in any one of claims 1 to 9, wherein the cover portion is domed.
  12. 12. A tray as claimed in claim 11, wherein the cover portion is flanged at its periphery to contact the base portion.
  13. 13. A tray as claimed in any preceding claim, wherein the material of the first layer of the laminate has a melting point between about 100 degrees Celsius and about 110 degrees Celsius and the material of the second layer of the laminate has a melting point between about 120 degrees Celsius and about 220 degrees Celsius.
  14. 14. A tray as claimed in any preceding claim, wherein the first layer of the plastics laminate comprises an ethylene acid copolymer having ionic bonding between polymer chains.
  15. 15. A tray as claimed in claim 14, wherein acid groups in such copolymer are partially neutralised.
  16. 16. A tray as claimed in claim 15, wherein acid groups are partially neutralised with either zinc or sodium ions.
    <Desc/Clms Page number 17>
  17. 17. A tray as claimed in any one of claims 1 to 13, wherein the first layer of the plastics laminate comprises a co-extruded film of one or more layers of low-density polyethylene and a layer of polyethylene coacrylic acid.
  18. 18. A tray as claimed in any preceding claim, wherein the second layer of the plastics laminate comprises polyvinyl chloride, or amorphous polyethylene terephthalate, or crystalline polyethylene terephthalate.
  19. 19. A tray as claimed in any preceding claim, wherein the cover portion is transparent.
  20. 20. A packaging tray substantially as hereinbefore described with reference to, and as shown in, the accompanying drawings.
  21. 21. A method of manufacturing a packaging tray comprising: providing a base portion comprising aluminium foil; providing a cover portion comprising a plastics laminate having at least first and second layers, the first layer being of a material having a lower melting point than a material of the second layer; arranging the cover portion overlying the base portion with the first layer of the laminate located in contact with the base
    <Desc/Clms Page number 18>
    portion at a periphery of the base portion; and adhering, by heat-sealing, the first layer of the laminate to the periphery of the base portion.
  22. 22. A method according to claim 21, wherein the heatsealing is effected by application of heat to cause softening, at least to a state of tackiness, of the material of the first layer of the laminate in contact with the base portion, without causing deformation or damage to the material of the second layer of the laminate.
  23. 23. A method according to claim 22, wherein the heatsealing is effected by the application of heat to cause softening to a state of melting.
  24. 24. A method according to claim 22 or 23, wherein the application of heat is effected locally to the first layer of the laminate where in contact with the base portion.
  25. 25. A method according to claim 24, wherein the heat is applied by thermal conduction through the base portion.
    <Desc/Clms Page number 19>
  26. 26. A method according to any one of claims 21 to 25, wherein pressure is applied to urge the cover portion into contact with the base portion during heat-sealing.
  27. 27. A method according to any one of claims 21 to 26, wherein the tray is evacuated prior to heat-sealing.
  28. 28. A method according to claim 27, wherein the tray is back-filled with a gas prior to heat-sealing.
  29. 29. A method according to any one of claims 21 to 28, wherein the base portion includes a recessed portion, having one or more compartments, and a flange-like peripheral portion.
  30. 30. A method according to any one of claims 21 to 29, wherein the cover portion is substantially flat.
  31. 31. A method according to any one of claims 21 to 29, wherein the cover portion is domed.
  32. 32. A method according to claim 31, wherein the cover portion is flanged at its periphery to contact the base portion.
    <Desc/Clms Page number 20>
  33. 33. A method according to any one of claims 21 to 32, wherein the material of the first layer of the laminate has a melting point between about 100 degrees Celsius and about 110 degrees Celsius and the material of the second layer of the laminate has a melting point between about 120 degrees Celsius and about 220 degrees Celsius.
  34. 34. A method according to any one of claims 21 to 33, wherein the first layer of the plastics laminate comprises an ethylene acid copolymer having ionic bonding between polymer chains.
  35. 35. A method according to claim 34, wherein acid groups in such copolymer are partially neutralised.
  36. 36. A method according to claim 35, wherein acid groups are partially neutralised with either zinc or sodium ions.
  37. 37. A method according to any one of claims 21 to 33, wherein the first layer of the plastics laminate comprises a co-extruded film of one or more layers of low-density polyethylene and a layer of polyethylene coacrylic acid.
    <Desc/Clms Page number 21>
  38. 38. A method according to any one of claims 21 to 37, wherein the second layer of the plastics laminate comprises polyvinyl chloride, or amorphous polyethylene terephthalate, or crystalline polyethylene terephthalate.
  39. 39. A method according to any one of claims 21 to 38, wherein the cover portion is transparent.
  40. 40. A method of manufacturing a packaging tray substantially as hereinbefore described with reference to the accompanying drawings.
GB0200362A 2002-01-09 2002-01-09 Packaging tray and method of manufacture Expired - Fee Related GB2385046B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0200362A GB2385046B (en) 2002-01-09 2002-01-09 Packaging tray and method of manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0200362A GB2385046B (en) 2002-01-09 2002-01-09 Packaging tray and method of manufacture

Publications (3)

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GB0200362D0 GB0200362D0 (en) 2002-02-20
GB2385046A true GB2385046A (en) 2003-08-13
GB2385046B GB2385046B (en) 2005-08-10

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005095224A1 (en) * 2004-03-31 2005-10-13 Plus Pack A/S A package
EP1938951A3 (en) * 2006-12-06 2010-03-17 D2 Food Systems Limited Food container
FR2950030A1 (en) * 2009-09-17 2011-03-18 Guelt Device for sealing plastic tray that is utilized for packaging food products under e.g. vacuum atmosphere, has coupling units cooperating with complementary coupling units of head to couple and uncouple sole to and from jack
US11142379B2 (en) 2014-07-16 2021-10-12 Koninklijke Douwe Egberts B.V. Die-cut lid and associated container and method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992005088A1 (en) * 1990-09-25 1992-04-02 Effem Gmbh Bowl package

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992005088A1 (en) * 1990-09-25 1992-04-02 Effem Gmbh Bowl package

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005095224A1 (en) * 2004-03-31 2005-10-13 Plus Pack A/S A package
EP1938951A3 (en) * 2006-12-06 2010-03-17 D2 Food Systems Limited Food container
FR2950030A1 (en) * 2009-09-17 2011-03-18 Guelt Device for sealing plastic tray that is utilized for packaging food products under e.g. vacuum atmosphere, has coupling units cooperating with complementary coupling units of head to couple and uncouple sole to and from jack
US11142379B2 (en) 2014-07-16 2021-10-12 Koninklijke Douwe Egberts B.V. Die-cut lid and associated container and method
US11325760B2 (en) 2014-07-16 2022-05-10 Koninklijke Douwe Egberts B.V. Die-cut lid and associated container and method

Also Published As

Publication number Publication date
GB2385046B (en) 2005-08-10
GB0200362D0 (en) 2002-02-20

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Effective date: 20060109