EP0023746B1 - Process for packaging margarine and suchlike - Google Patents

Process for packaging margarine and suchlike Download PDF

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Publication number
EP0023746B1
EP0023746B1 EP80200732A EP80200732A EP0023746B1 EP 0023746 B1 EP0023746 B1 EP 0023746B1 EP 80200732 A EP80200732 A EP 80200732A EP 80200732 A EP80200732 A EP 80200732A EP 0023746 B1 EP0023746 B1 EP 0023746B1
Authority
EP
European Patent Office
Prior art keywords
cavities
product
air
lid
die
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.)
Expired
Application number
EP80200732A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0023746A1 (en
Inventor
Winrich Bernhard Hammerschmidt
Wolfgang Dorawa
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.)
Unilever PLC
Unilever NV
Original Assignee
Unilever PLC
Unilever NV
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 PLC, Unilever NV filed Critical Unilever PLC
Priority to AT80200732T priority Critical patent/ATE5577T1/de
Publication of EP0023746A1 publication Critical patent/EP0023746A1/en
Application granted granted Critical
Publication of EP0023746B1 publication Critical patent/EP0023746B1/en
Expired legal-status Critical Current

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Classifications

    • 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
    • B65B25/00—Packaging other articles presenting special problems
    • B65B25/06—Packaging slices or specially-shaped pieces of meat, cheese, or other plastic or tacky products

Definitions

  • the invention relates to a process for packaging margarine and similar products which have the tendency to adhere to the packaging material, as a result of which opening of the packages is made more difficult.
  • German Utility Model 79 02 913 it is proposed to decrease considerably the adherence of pasty products to the closure part by providing the closure part, on a side turned towards the products, with a plurality of small, separate cavities.
  • the disadvantage of this solution is that the cavities on the inner side, obtained for example by embossing, stand out more or less clearly on the outer side of the closure part and that with relatively thin packaging material satisfactory embossing often cannot be achieved.
  • the aim of the invention is therefore to decrease the adherence of the pasty products to the packaging material, also in the case of closure parts which are smooth on their inner side, so that these packages can be opened easily.
  • the cavities have an open area of 0.5 mm 2 to 20 mm 2 , preferably of 2 mm 2 to 6.5 mm 2 , measured approximately in the plane of the surrounding edges, and a depth of 0.4 to 2.5 mm. They are made in the surface of the product, before the lid is put on, by embossing or by jets of gas, e.g. air, directed against the surface. By placing the lid on the edges of the cavities, each of the cavities filled with air or inert gas is sealed off from the neighbouring cavities. When this is done a monitored small amount of air or inert gas is enclosed in each cavity in the surface of the product. In the closed packages the cavities are not connected with each other.
  • each cavity contains a small air cushion with a very slight excess pressure caused by pressing of the closure part against the edges of the cavities. If the cavities are obtained by blowing air against the surface, in that case they form little craters the edges of which are not entirely regular but, as a result of the closure part being pressed down, are brought into a plane with those of the neighbouring cavities, each cavity then being sealed off.
  • cavities of any given cross-section can be obtained, e.g. in the form of truncated pyramids.
  • the product can be given a substantially smooth surface, for example by a press-on tool, and/or e.g. its surface be solidified to such an extent by cooling that the cavities can be made and for the greater part will last.
  • the process is particularly suitable for the packaging of pre-formed portions of margarine of somewhat firmer consistency in erected folding boxes of cardboard material which are to be closed with a lid. However, it can also be applied with beakers or trays which are closed with a plastic lid having a smooth inner side. Finally, the process can also be applied to one or more surfaces of a pre-formed portion which is enclosed by a wrapper.
  • the process may be carried out using customary apparatus e.g. for introducing the product into the package and for closing the package, which additionally comprises a device for making the small cavities in the surface of the product, against which surface a closure part is pressed down.
  • customary apparatus e.g. for introducing the product into the package and for closing the package, which additionally comprises a device for making the small cavities in the surface of the product, against which surface a closure part is pressed down.
  • This device for making the cavities can be an appropriately profiled die.
  • a hollow die with a great number of nozzle-like openings is preferred. Jets of air or gas are blown intermittently against the surface of the product.
  • the die can be heatable on its side that is turned towards the product and can be provided with a special coating which, for example, hinders adherence of the product to the die.
  • heated gas for the blowing is possible, but local melting of the product by the jets of air should be avoided.
  • an appropriately structured roller can be used, under which the unclosed, filled package is transported continuously.
  • a portion of margarine 1 is placed in a folding box 2, which is to be closed by a lid 3, the lid 3 being pressed down against the surface 4 of the portion and partly overlapping the front side 5 of the folding box 2.
  • a package is difficult to open if adherence of the surface 4 and the lid 3 is not reduced.
  • a hollow die 11 with a plurality of small, nozzle-like openings 12 in the side turned towards the surface 4 of the margarine is moved towards the filled, unclosed package (Fig. 1).
  • air or a suitable gas is intermittently introduced via a gas supply, which air or gas spreads itself in the hollow space 14 of the die 11 over the openings 12 and creates a small, crater-like cavity 6 under each opening 12 (Fig. 2).
  • Fig. 4 shows a cross-section of a part of a package with enclosed product of which the surface 4 is substantially smooth.
  • Fig. 5 shows the cavities 6 made by blowing, which have edges 7 pressed upwards to some extent in a surface 4.
  • the lid has been put on and pressed down, the edges 7 being brought into a plane and the separate cavities being sealed off with respect to each other.
  • Fig. 7 shows a die 21 which is profiled on its under-side with a plurality of pins or similar projections which have the form of a pyramid or a truncated cone and, for example, are staggered.
  • the die 21 is pressed partly into a surface of a product and hereby embosses a pattern of many tiny cups or suchlike, corresponding to its profiling, which, however, are likewise independent of each other.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closing Of Containers (AREA)
  • Packging For Living Organisms, Food Or Medicinal Products That Are Sensitive To Environmental Conditiond (AREA)
  • Edible Oils And Fats (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Confectionery (AREA)
  • Vacuum Packaging (AREA)
EP80200732A 1979-07-30 1980-07-30 Process for packaging margarine and suchlike Expired EP0023746B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80200732T ATE5577T1 (de) 1979-07-30 1980-07-30 Verfahren zum verpacken von margarine oder dgl.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19792930930 DE2930930A1 (de) 1979-07-30 1979-07-30 Verfahren und vorrichtung zum verpacken von margarine u.ae.
DE2930930 1979-07-30

Publications (2)

Publication Number Publication Date
EP0023746A1 EP0023746A1 (en) 1981-02-11
EP0023746B1 true EP0023746B1 (en) 1983-12-14

Family

ID=6077180

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80200732A Expired EP0023746B1 (en) 1979-07-30 1980-07-30 Process for packaging margarine and suchlike

Country Status (4)

Country Link
EP (1) EP0023746B1 (fi)
AT (1) ATE5577T1 (fi)
DE (2) DE2930930A1 (fi)
FI (1) FI65960C (fi)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995005734A1 (en) * 1993-08-27 1995-03-02 The Pillsbury Company Mechanical gas flushing system
WO2013026644A1 (en) 2011-08-24 2013-02-28 Unilever N.V. A method of embossing or shaping a water-in-oil emulsion of plastic consistency

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1207552A (en) * 1968-06-14 1970-10-07 Leo Peters Method of and means for embossment and packaging of cold butter

Also Published As

Publication number Publication date
FI65960C (fi) 1984-08-10
DE3065882D1 (en) 1984-01-19
EP0023746A1 (en) 1981-02-11
FI65960B (fi) 1984-04-30
DE2930930A1 (de) 1981-02-26
ATE5577T1 (de) 1983-12-15
FI802380A (fi) 1981-01-31

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