EP0581123A1 - Procédé pour emballer des marchandises exemptes d'oxygène - Google Patents

Procédé pour emballer des marchandises exemptes d'oxygène Download PDF

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Publication number
EP0581123A1
EP0581123A1 EP93111311A EP93111311A EP0581123A1 EP 0581123 A1 EP0581123 A1 EP 0581123A1 EP 93111311 A EP93111311 A EP 93111311A EP 93111311 A EP93111311 A EP 93111311A EP 0581123 A1 EP0581123 A1 EP 0581123A1
Authority
EP
European Patent Office
Prior art keywords
container
edge
gas
cover
interior
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
EP93111311A
Other languages
German (de)
English (en)
Other versions
EP0581123B1 (fr
Inventor
Franz Dipl.-Ing. Garnreiter (Fh)
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.)
Linde GmbH
Original Assignee
Linde GmbH
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 Linde GmbH filed Critical Linde GmbH
Publication of EP0581123A1 publication Critical patent/EP0581123A1/fr
Application granted granted Critical
Publication of EP0581123B1 publication Critical patent/EP0581123B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
    • B65B31/04—Evacuating, pressurising or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied
    • B65B31/043—Evacuating, pressurising or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied the nozzles acting horizontally between an upper and a lower part of the container or wrapper, e.g. between container and lid

Definitions

  • the invention relates to a method for oxygen-free packaging of goods in an open-topped container with a container edge which delimits the container at the top and a container bottom which delimits the container and which is raised in one or more areas of the container interior encompassed by the container edge up to the height of the container edge , wherein the goods are filled into the container and the container interior is flushed with a gas before the container is sealed gas-tight with a cover, and a device for performing the method.
  • a common packaging method is, for example, to evacuate the package and then seal it.
  • this can only be carried out with flexible packings, since otherwise the packaging can easily be damaged by forces arising from the vacuum.
  • this method is associated with an enormous expenditure on equipment.
  • a further development of the above-mentioned method consists in backgassing the evacuated pack with inert, oxygen-free gas and then sealing it. This method can then also be used to pack product in rigid containers.
  • the shells must be closed until at least 99 from 100 trays the liquid nitrogen has completely evaporated. Otherwise, residues of liquid nitrogen in the sealed shell would lead to excess pressure in the shell after evaporation, which would at least result in undesired bulging of the lid or even bursting of the packaging.
  • a gas is blown into the partially sealed package from the unsealed side, the package is flushed with the gas, the gas is withdrawn on the unsealed side, and the package is finally completely sealed.
  • this method does not guarantee that the contents of the package are purged completely free of oxygen, since under the end of the package facing away from the unsealed side the areas covered by the filled goods may not be sufficiently covered by the purge gas.
  • this method is unsuitable for washing multi-compartment menu trays, since each of the compartment volumes would have to be washed separately, which would require considerable effort.
  • the object of the present invention is to design a method of the type mentioned at the outset and a device for carrying out the method in such a way that oxygen-free packaging of goods takes place in a simple and economical manner without the disadvantages of the previous methods and devices mentioned.
  • the cover is kept a short distance above the edge of the container during the flushing process, the gas is inflated from below through at least one passage opening provided in the region of the container bottom which is raised to the height of the container edge, the gas deflected by the cover in the horizontal direction and radially in the Container interior is transferred, the gas is released to the atmosphere through a gap formed by the container edge and the cover, after the flushing process, the cover is attached to the container edge and the connection between the passage opening and the container interior is interrupted.
  • the gas is distributed evenly from a preferably central location of the container into the individual container areas, so that the entire interior of the container can be purged completely oxygen-free from one location.
  • the container is axially symmetrical
  • the raised region of the container base with the passage opening for the gas is preferably on the imaginary axis.
  • the passage opening is expediently arranged at the imaginary intersection of the diagonals. Since the cover is held only a short distance, preferably 1 to 30 mm, above the edge of the container, it is ensured that due to the associated small outflow cross-sections for the gas from the container, a sufficient gas pressure can be produced in the container to remove the air from the to displace entire container volume. By setting a small distance between the cover and the raised area of the container bottom it is achieved that the blown-in gas is immediately deflected in the horizontal direction and transferred radially evenly distributed into the container interior.
  • the invention further relates to a device for carrying out the method with a container which is open at the top and can be closed with a cover in a gas-tight manner, with a container edge which delimits the container at the top and a container bottom which delimits the container and which in one or more regions of the container interior encompassed by the container edge is pulled up to the height of the container rim.
  • At least one gas passage opening is provided in the region of the container bottom which is raised up to the height of the container edge, and a cover which can be lowered onto the container edge is arranged above the container edge and is positioned at a short distance from the container edge in the unlocked state of the container, while the cover is open in the closed state the edge of the container and the raised area of the container bottom.
  • the invention is particularly suitable for the oxygen-free packaging of multi-compartment menu trays, in which the individual compartments are separated from one another by compartment dividers which converge in a central container area.
  • the gas passage opening is arranged in the area where the compartment partition walls converge. In this way it is achieved that the individual compartment volumes can be flushed uniformly with the gas from one point.
  • a sealing surface is usually applied to the edge of the container, on which the cover is attached.
  • the raised area of the container base is preferably delimited in the radial direction by a sealing surface so that the cover can be attached to the outer edge of the raised area of the container base. The entire interior of the container is thus sealed gas-tight both towards the edge of the container and towards the passage opening in the bottom of the container.
  • an inert gas in particular gaseous nitrogen, or a mixed gas, in particular an N2 / CO2 mixed gas or an N2 / CO2 / O2 mixed gas with possible proportions of argon, is expediently Helium or carbon monoxide are used.
  • the gaseous nitrogen displaces the oxygen from the container and creates an inert atmosphere inside the container, which increases the shelf life of the food.
  • the invention enables a uniform gas purging of the container from one place.
  • oxygen-free packaging of product in containers is achieved without expensive equipment, such as e.g. Vacuum pumps and vacuum chambers would be required.
  • the process according to the invention creates an oxygen-free atmosphere in the containers within a short time, which also ensures packaging and storage of oxygen-sensitive products. In this way e.g. Foods are permanently protected from oxidation processes so that their shelf life is improved.
  • the invention is particularly suitable for packaging finished food products in single or multi-compartment menu trays.
  • FIG. 1 shows a container 6 designed as a menu tray, such as that used for packaging finished food products is used.
  • the menu tray 6 has a container base 12 which is raised in the middle of the menu tray 6 to the height of the container edge 10 and forms an area 8.
  • a gas passage opening 9 is arranged in this area 8.
  • the passage opening 9 is connected to a gas supply line 3 via which gaseous nitrogen is supplied to the gas passage opening and is inflated onto the cover 2 from below.
  • the gas flow is deflected in the horizontal direction by the cover 2 and is distributed to the interior of the container in a radially uniform manner.
  • the cover 2 is held at a small distance, preferably 1 to 30 mm, over the area 8 and the container edge 10.
  • the area 5 of the container interior is covered by the filled goods, e.g. a finished food product, filled out.
  • the area 4 lying above is usually referred to as the container head space.
  • the entire container interior 4, 5 can be flushed oxygen-free from a central point. Not only is the air from the container head space 4 but also from the spaces formed by the goods in the area 5 flushed oxygen-free.
  • the path of the nitrogen gas is shown in the figure with arrows. After purging the container interior 4, 5, the nitrogen gas is released into the atmosphere via the gap formed by the container edge 10 and the cover 2.
  • the cover is lowered by means of the sealing device 1 on the container edge 10 and the area 8 of the container base 12.
  • the menu tray 6 is by means of sealing surfaces, which on the container edge 10 and the area 8th are applied, sealed gastight. Therefore, atmospheric oxygen can no longer get into the container interior 4, 5 via the gas passage opening 9.
  • FIG. 2 shows a top view of a multi-compartment menu tray, the compartment dividing walls 11 converging in a central region 8 of the menu tray.
  • the container base is pulled upwards and forms a small cup open at the top with a cup rim on which a sealing surface 7 is applied.
  • the nitrogen gas is blown into the cup from below and, over the rim of the cup, passes into the individual compartment volumes of the menu bowl in a radially even distribution.
  • the nitrogen gas displaces the atmospheric oxygen from the fan volumes and is released into the atmosphere via the container rim 10. In this way, the entire container volume can be flushed completely oxygen-free from a fumigation point.
  • the path of the nitrogen gas is again shown in the figure by arrows.
  • the cover rests on the sealing surfaces 7 of the raised region 8 and the container rim 10. After the menu tray has been sealed, atmospheric oxygen can no longer get into the menu tray via the gas passage opening in the raised area 8, since the gas passage opening is closed by the cover.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vacuum Packaging (AREA)
EP93111311A 1992-07-28 1993-07-14 Procédé pour emballer des marchandises exemptes d'oxygène Expired - Lifetime EP0581123B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4224920 1992-07-28
DE4224920A DE4224920A1 (de) 1992-07-28 1992-07-28 Verfahren und Vorrichtung zum sauerstofffreien Verpacken von Ware

Publications (2)

Publication Number Publication Date
EP0581123A1 true EP0581123A1 (fr) 1994-02-02
EP0581123B1 EP0581123B1 (fr) 1996-10-09

Family

ID=6464300

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93111311A Expired - Lifetime EP0581123B1 (fr) 1992-07-28 1993-07-14 Procédé pour emballer des marchandises exemptes d'oxygène

Country Status (2)

Country Link
EP (1) EP0581123B1 (fr)
DE (2) DE4224920A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4418492C2 (de) * 1994-05-27 1998-03-19 Heinz Opel Verfahren zum Verpacken, Lagern und zum Transport von freirollend gefrosteten, stückigen Tiefkühlerzeugnissen
EP1357035A1 (fr) 2002-04-24 2003-10-29 Werner Grabher Procédé et dispositif pour la purge de récipients par gaz protecteur
DE102010051543A1 (de) * 2010-11-18 2012-05-24 Krones Aktiengesellschaft Vorrichtung und Verfahren zum Befüllen von Behältnissen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3811594A (en) * 1971-11-26 1974-05-21 Jenos Inc Unitary container for a food product
AT347352B (de) * 1973-05-09 1978-12-27 Multivac Haggenmueller Kg Verfahren zum verpacken von beim sieden zum spritzen neigendem fuellgut in kunst stoffverpackungsfolien und regelvorrichtung zur durchfuehrung des verfahrens

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3811594A (en) * 1971-11-26 1974-05-21 Jenos Inc Unitary container for a food product
AT347352B (de) * 1973-05-09 1978-12-27 Multivac Haggenmueller Kg Verfahren zum verpacken von beim sieden zum spritzen neigendem fuellgut in kunst stoffverpackungsfolien und regelvorrichtung zur durchfuehrung des verfahrens

Also Published As

Publication number Publication date
DE59304095D1 (de) 1996-11-14
EP0581123B1 (fr) 1996-10-09
DE4224920A1 (de) 1994-02-03

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