Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D43/00—Lids or covers for rigid or semi-rigid containers
  • B65D43/02—Removable lids or covers
  • B65D43/0202—Removable lids or covers without integral tamper element
  • B65D43/0214—Removable lids or covers without integral tamper element secured only by friction or gravity
  • B65D43/022—Removable lids or covers without integral tamper element secured only by friction or gravity only on the inside, or a part turned to the inside, of the mouth of the container
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D51/00—Closures not otherwise provided for
  • B65D51/18—Arrangements of closures with protective outer cap-like covers or of two or more co-operating closures
  • B65D51/185—Arrangements of closures with protective outer cap-like covers or of two or more co-operating closures the outer closure being a foil membrane
• • 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
  • B65D2251/00—Details relating to container closures
  • B65D2251/0003—Two or more closures
  • B65D2251/0006—Upper closure
  • B65D2251/0031—Membrane
• • 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
  • B65D2251/00—Details relating to container closures
  • B65D2251/0003—Two or more closures
  • B65D2251/0068—Lower closure
  • B65D2251/0081—Lower closure of the 43-type
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D2543/00—Lids or covers essentially for box-like containers
  • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
  • B65D2543/00018—Overall construction of the lid
  • B65D2543/00064—Shape of the outer periphery
  • B65D2543/0012—Shape of the outer periphery having straight sides, e.g. with curved corners
  • B65D2543/00175—Shape of the outer periphery having straight sides, e.g. with curved corners four straight sides, e.g. trapezium or diamond
  • B65D2543/00194—Shape of the outer periphery having straight sides, e.g. with curved corners four straight sides, e.g. trapezium or diamond square or rectangular
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D2543/00—Lids or covers essentially for box-like containers
  • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
  • B65D2543/00018—Overall construction of the lid
  • B65D2543/00259—Materials used
  • B65D2543/00314—Combination, e.g. laminates, several different materials
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D2543/00—Lids or covers essentially for box-like containers
  • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
  • B65D2543/00425—Lids or covers welded or adhered to the container
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D2543/00—Lids or covers essentially for box-like containers
  • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
  • B65D2543/00444—Contact between the container and the lid
  • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
  • B65D2543/0049—Contact between the container and the lid on the inside or the outside of the container on the inside, or a part turned to the inside of the mouth of the container
  • B65D2543/00518—Skirt
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D2543/00—Lids or covers essentially for box-like containers
  • B65D2543/00009—Details of lids or covers for rigid or semi-rigid containers
  • B65D2543/00444—Contact between the container and the lid
  • B65D2543/00481—Contact between the container and the lid on the inside or the outside of the container
  • B65D2543/00537—Contact between the container and the lid on the inside or the outside of the container on the outside, or a part turned to the outside of the mouth of the container
  • B65D2543/00546—NO contact
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
  • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
  • Y02W30/00—Technologies for solid waste management
  • Y02W30/50—Reuse, recycling or recovery technologies
  • Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging

Definitions

• the present invention relates to a method and a device for sealing a thermoplastic food package, comprising a container base and a reusable cover to be applied to the base
• Packages of this kind are today used above all as containers for cooking fat, different kinds of pates and soft cheese, but also other uses are of course possible.
• Such food stuffs are presently packed for a comparatively limited quality keeping term, usually up to a few months.
• the product liver paste which usually is prepared (i.e. is pasteurised by heating) after the package with its content has been sealed for sale, the said term for the product is very clearly dependent on the tightness of the package above all regarding oxygen, because the presence of this substance is a prerequisite for the micro ⁇ bial growth which sooner or later will make the contained product unsuitable as food.
• the oxygen permeability is generally speaking a direct function of the thickness of the package or the cover, which may lead to the conclusion that the thickness of the cover simply has to be increased.
• this leads to consequential problems both with regard to the sealing of the package before sale, which usually and up till now has occurred by means of a simple contact welding or heating process, and with regard to the phenomenon that producers of food stuffs packed in the actual way most often are obliged to give certain information about the contained product and usually also are interested in profiling their product in one way or another, which at packages of this type almost always at least is done by printing different informative messages on the cover.
• the object of the present invention is therefore to accomplish a method and a device as defined above, whereby a distribution of the oxygen permeability for the entire packaging product is possible, at the same time as the possibility with printed messages on above all package- covers as well as the possibility also in the future to make use of contact welding/heating are maintained.
• the cover is manufactured and mounted as a sandwich construction of at least two generally planar thermoplastic parts, namely an oxygen permeability determining, lower part and a covering part, the covering part having somewhat larger size or area than the lower part, so that when the parts are mounted the covering part forms a projection por ⁇ tion, which hermetically seals the package in that the packing edge is contact heated, after the projecting por- tion of the covering part has been applied, the projecting portion of the covering part being heat/sealed to the pack ⁇ age container.
• Fig. 1 is a side-view of a foodstuff-package with cover
• Fig. 2 is a plan view of the cover in Fig. 1
• Fig. 3 is a side view of only the cover along one of its longitudinal sides
• Fig. 4 is a cross-section along the line IV-IV in Fig. 2
• Fig. 5 is a cross-section along the line V-V in Fig. 1.
• Fig. 1 shows a foodstuff-package with a base 1 and a cover 4, viewed from one of its longitudinal sides 2, the package 1, 4 having a stiffening flange 3 along substan- tially its entire opening.
• the cover 4 which appears with slightly thicker lines in the upper right corner 5 of the figure, is further described below.
• the material in the base 1 is preferably polypropylene, but also other thermoplastic materials, such as styrene or polyester, may well be used.
• one of the upper corners of the base 1 has a recess 6. This recess is per see well known in the art and has the purpose of enabling a simple removal of the cover 4 from the base 1.
• Fig. 2 is a plan view of the cover 4 in an applied condition.
• the cover 4 which is a sandwich construction (to be described below) , has on its upper side a number of projections 7, which belong to the lower part 8 of the cover, which part is injection moulded to a thickness of about 0.5 mm like the package base 1.
• the projections 7 are intended to determine the position for and fix a covering part 9 of thermoplastic material, which has a thickness of between 0.1 and 0.2 mm and which has two main purposes: on the one hand to enable a simple application, preferably by four colour printing, of different types of messages (infor a- tive or profiling) on the cover surface 10, which is vis ⁇ ible in the mounted condition, on the other hand on the reverse surface (facing inwards against the package) carry a thermoplastic binder or lacquer, which at a contact heat- welding is intended to hermetically seal the base possibly before final preparation but above all before distribution and sale.
• the covering part 9 has a portion 11 which projects outside or over the lower part 8 of the cover, at which portion 11 the flange 3 of the package base 1 is hermetically sealed by heating, preferably contact welding.
• the welding is so performed that the actual surfaces during about one second are heated to about 150°C under application of a low pres ⁇ sure from the outside of the respective details, at the same time as the package base 1 and the projecting portion 11 of the covering part 9 are in contact with each other.
• the lower part 8 has a shape which corresponds to the flange/edge 3 of the lower part 1, whereby the package may be closed in a simple hy ⁇ gienic way after the first removal of the hermetical seal- ing with the projecting portion 11.
• Fig. 3 shows the com ⁇ pleted cover with the covering part 9 in a side view. It appears clearly that the projections 7 in this condition penetrate the covering part 9. This is however of low importance, because the covering part adheres to the entire lower part of the cover, whereby the lower part 8 of the cover will be determining for the oxygen permeability of the cover.
• Fig. 4 is an enlargement of the edge portion of the completed cover 8, 9 in a partial section.
• Fig. 5 shows how the completed cover 8, 9 co-operates with the package base 1, and it appears on one hand that the co-operation is such that closure and opening of the package is facilitated, after the hermetical sealing has been broken, on the other hand that normal hygienical requirement on such closures can be fulfilled in a simple way.
• the package base 1 of course also preferably is provided with some kind of deco ⁇ ration or information. This may be applied by means of a label or in any other suitable way.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Packages (AREA)
• Closures For Containers (AREA)
• Closing Of Containers (AREA)
• Package Closures (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=20401154

Family Applications (1)

Country Status (5)

Families Citing this family (2)

Family Cites Families (2)

• 1996
  • 1996-01-26 SE SE9600281A patent/SE512612C2/sv not_active IP Right Cessation
• 1997
  • 1997-01-27 WO PCT/SE1997/000121 patent/WO1997027106A1/en not_active Application Discontinuation
  • 1997-01-27 AU AU15642/97A patent/AU1564297A/en not_active Abandoned
  • 1997-01-27 EP EP19970901898 patent/EP1009656A1/en not_active Ceased
• 1998
  • 1998-07-23 NO NO19983394A patent/NO314489B1/no not_active IP Right Cessation

Non-Patent Citations (1)

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