EP0298481B1 - Method and device for the oxygen-free packaging of products - Google Patents
Method and device for the oxygen-free packaging of products Download PDFInfo
- Publication number
- EP0298481B1 EP0298481B1 EP88110877A EP88110877A EP0298481B1 EP 0298481 B1 EP0298481 B1 EP 0298481B1 EP 88110877 A EP88110877 A EP 88110877A EP 88110877 A EP88110877 A EP 88110877A EP 0298481 B1 EP0298481 B1 EP 0298481B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- containers
- product
- liquid nitrogen
- oxygen
- tunnel
- 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 - Lifetime
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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
- B65B25/001—Packaging other articles presenting special problems of foodstuffs, combined with their conservation
Definitions
- the invention relates to a method according to the preamble of claim 1 and a device according to the preamble of claim 5 for the oxygen-free packaging of product in containers, as is known from US-A-3477192
- a common packaging method is e.g. in evacuating the pack and then closing it, but this can only be done with flexible packs, since otherwise the pack can easily be damaged by forces due to the vacuum.
- this method is associated with an enormous expenditure on equipment. Elaborate vacuum chambers and at least one powerful vacuum pump are required.
- a further development of the above-mentioned method consists of back-gassing 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.
- Another packaging method involves purging the package with an inert, oxygen-free gas. The package is then closed. However, packs filled with lumpy product are not obtained with sufficient oxygen freedom afterwards by flushing with inert gas in a reasonable time.
- the object of the present invention is therefore to design a method and a device of the type mentioned at the outset in such a way that oxygen-free packaging of products takes place in a simple and economical manner without the disadvantages of previous methods mentioned.
- liquid nitrogen is metered into the containers immediately before and / or after the product is poured into the containers, then the containers are transferred to an inert zone, gaseous nitrogen is fed into the inert zone and the Containers are closed in the inert zone.
- liquid nitrogen in connection with an inert zone for the oxygen-free packaging of products.
- a decisive role is played by the fact that liquid nitrogen has a high evaporation rate and that small amounts of liquid nitrogen produce a large volume of gas during evaporation.
- a gas volume of about 0.85 l of gaseous nitrogen is thus produced from 1 g of liquid nitrogen.
- liquid nitrogen is poured into the containers provided for packaging the product. Immediately before or after this process step, the product is placed in the containers. Due to the contact of the liquid nitrogen with the product, the liquid nitrogen evaporates rapidly, so that the resulting large gas volume of nitrogen gas displaces the oxygen from the containers. In the subsequent inert zone, the addition of nitrogen prevents atmospheric oxygen from entering the containers before being sealed. The containers are then closed within the inert zone.
- the product to be packaged is filled into the container immediately after the liquid nitrogen has been metered in. This ensures that the liquid nitrogen evaporates rapidly through intensive contact with the product and the resulting gaseous nitrogen displaces the oxygen from the product and the container.
- the liquid nitrogen is expediently filled into the containers in an amount which is sufficient to flush the containers and the product free of oxygen after the liquid nitrogen has evaporated.
- gaseous nitrogen heated to 40 to 80 ° C. is supplied in the inert zone. This replaces the heat extracted from the containers when the liquid nitrogen evaporates. Failure to do so would result in mostly undesirable pressure increases in the containers after temperature equalization.
- oxygen-free packaging of the product in containers is achieved without the need for complex apparatus, such as vacuum pumps and vacuum chambers.
- the method 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, for example, foods can be permanently protected from oxidation processes, so that their durability is improved.
- the invention is particularly suitable for packaging lumpy goods, such as nuts, granules, etc., in metal containers or combination cans.
- a device for carrying out the method consists of a conveyor belt for receiving the containers, a filling device for the product and a closing device for closing the containers.
- a metering device connected to a storage container for liquid nitrogen and a tunnel kept under inert conditions are arranged one after the other along the conveyor belt.
- supply lines for gaseous nitrogen lead into the interior of the tunnel.
- the closing device is arranged inside the tunnel.
- the filling device for the product is expediently arranged between the metering device for liquid nitrogen and the tunnel.
- the tunnel has a length of approximately 0.5 to 3 m.
- the figure shows a schematic representation of the process sequence in the oxygen-free packaging of product according to the invention in containers.
- the containers provided for packaging are fed to two different process steps on a conveyor belt.
- a first process step liquid nitrogen is filled into a container 1 from a metering device 3 via line 10 in an amount of 10 g.
- the conveyor belt 2 conveys the container 1 further to a filling device 4 for the product 5 to be packaged.
- There the product 5 is introduced into the container 1.
- a cover film 6 is then firmly dotted onto the container 1.
- gaseous nitrogen heated to 60 ° C. is supplied via lines 8.
- the conveyor belt 2 transports the container 1 through the tunnel, which has a length of 2 m. Shortly before leaving the tunnel, the container 1 is still closed inside the tunnel by a sealing device 9 designed as a sealing device.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vacuum Packaging (AREA)
- Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren gemäß dem Oberbegriff des Anspruchs 1 und eine Vorrichtung gemäß dem Oberbegriff des Anspruchs 5 zum sauerstofffreien Verpacken von Produkt in Behältern, wie aus der US-A-3477192 bekannt istThe invention relates to a method according to the preamble of claim 1 and a device according to the preamble of claim 5 for the oxygen-free packaging of product in containers, as is known from US-A-3477192
Bei einigen Produkten, insbesondere Lebensmittelprodukten, ist es vorteilhaft, sie unter Ausschluß von Sauerstoff aufzubewahren, um z.B. deren Haltbarkeit sicherzustellen. Es sind verschiedene Verfahren bekannt, um innerhalb einer Packung eine sauerstofffreie Atmosphäre zu schaffen.For some products, especially food products, it is advantageous to store them in the absence of oxygen, e.g. ensure their durability. Various methods are known for creating an oxygen-free atmosphere within a package.
Eine übliche Verpackungsmethode besteht z.B. darin, die Packung zu evakuieren und anschließend zu verschließen.Dies ist jedoch nur mit flexiblen Packungen durchführbar, da sonst durch aufgrund des Vakuums auftretende Kräfte eine Beschädigung der Packung leicht möglich ist. Außerdem ist diese Methode mit einem enormen apparativen Aufwand verbunden. Es sind aufwendige Vakuumkammern und mindestens eine leistungsfähige Vakuumpumpe erforderlich. Überdies ergeben sich Probleme bei Produkten mit niedrigsiedenden Aromastoffen, wie z.B. Kaffee, da diese dann aufgrund des Vakuums dem Produkt verlorengehen.A common packaging method is e.g. in evacuating the pack and then closing it, but this can only be done with flexible packs, since otherwise the pack can easily be damaged by forces due to the vacuum. In addition, this method is associated with an enormous expenditure on equipment. Elaborate vacuum chambers and at least one powerful vacuum pump are required. In addition, there are problems with products with low-boiling flavors, such as Coffee, as these are then lost to the product due to the vacuum.
Eine Weiterentwicklung der genannten Methode besteht darin, die evakuierte Packung mit inertem, sauerstofffreiem Gas rückzubegasen und anschließend zu verschließen. Damit kann diese Methode dann auch zum Abpacken von Produkt in starren Behältern verwendet werden.A further development of the above-mentioned method consists of back-gassing 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.
Eine andere Verpackungsmethode sieht ein Spülen der Packung mit einem inerten, sauerstofffreien Gas vor. Anschließend wird die Packung verschlossen. Mit stückigem Produkt gefüllte Pakkungen werden jedoch im nachhinein durch Spülung mit inertem Gas in angemessener Zeit nicht mit ausreichender Sauerstofffreiheit erhalten.Another packaging method involves purging the package with an inert, oxygen-free gas. The package is then closed. However, packs filled with lumpy product are not obtained with sufficient oxygen freedom afterwards by flushing with inert gas in a reasonable time.
Schließlich ist es auch bekannt, eine sauerstofffreie Atmosphäre innerhalb der Packung durch Sauerstoffbindung in der Packung mit Chemikalien zu erreichen. Diese Methode ist jedoch bei Lebensmittelpackungen z.B. aufgrund unsachgemäßer Verwendungsmöglichkeiten der Chemikalien durch Kinder bedenklich.Finally, it is also known to achieve an oxygen-free atmosphere within the package by binding oxygen in the package with chemicals. However, this method is used for food packaging e.g. due to improper use of the chemicals by children.
Aufgabe der vorliegenden Erfindung ist es daher, ein Verfahren und eine Vorrichtung der eingangs genannten Art so auszugestalten, daß eine sauerstofffreie Verpackung von Produkten auf einfache und wirtschaftliche Weise erfolgt, ohne daß die genannten Nachteile bisheriger Verfahren auftreten.The object of the present invention is therefore to design a method and a device of the type mentioned at the outset in such a way that oxygen-free packaging of products takes place in a simple and economical manner without the disadvantages of previous methods mentioned.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß unmittelbar bevor und/oder nachdem das Produkt in die Behälter eingefüllt wird, in die Behälter flüssiger Stickstoff dosiert wird, anschließend die Behälter in eine inerte Zone überführt werden, in der inerten Zone gasförmiger Stickstoff zugeführt wird und die Behälter in der inerten Zone verschlossen werden.This object is achieved in that liquid nitrogen is metered into the containers immediately before and / or after the product is poured into the containers, then the containers are transferred to an inert zone, gaseous nitrogen is fed into the inert zone and the Containers are closed in the inert zone.
Wesentlich und neu an der Erfindung ist die Verwendung von flüssigem Stickstoff in Verbindung mit einer inerten Zone zum sauerstoffreien Verpakken von Produkten. Eine entscheidene Rolle spielt dabei, daß flüssiger Stickstoff eine hohe Verdampfungsgeschwindigkeit aufweist und aus geringen Flüssigstickstoffmengen beim Verdampfen ein großes Gasvolumen entsteht. So entsteht aus 1 g flüssigem Stickstoff ein Gasvolumen von etwa 0,85 1 gasförmigen Stickstoffs.What is essential and new about the invention is the use of liquid nitrogen in connection with an inert zone for the oxygen-free packaging of products. A decisive role is played by the fact that liquid nitrogen has a high evaporation rate and that small amounts of liquid nitrogen produce a large volume of gas during evaporation. A gas volume of about 0.85 l of gaseous nitrogen is thus produced from 1 g of liquid nitrogen.
Erfindungsgemäß wird in die zur Verpackung des Produkts vorgesehenen Behälter flüssiger Stickstoff eingefüllt. Unmittelbar vor oder nach diesem Verfahrensschritt wird das Produkt in die Behälter eingegeben. Durch den Kontakt des flüssigen Stickstoffs mit dem Produkt verdampft der flüssige Stickstoff rasch, so daß das entstehende große Gasvolumen an Stickstoffgas den Sauerstoff aus den Behältern verdrängt. In der nachfolgenden inerten Zone wird durch Zufuhr von Stickstoff verhindert, daß vor dem Verschließen Luftsauerstoff in die Behälter eindringen kann. Anschließend werden die Behälter innerhalb der inerten Zone verschlossen.According to the invention, liquid nitrogen is poured into the containers provided for packaging the product. Immediately before or after this process step, the product is placed in the containers. Due to the contact of the liquid nitrogen with the product, the liquid nitrogen evaporates rapidly, so that the resulting large gas volume of nitrogen gas displaces the oxygen from the containers. In the subsequent inert zone, the addition of nitrogen prevents atmospheric oxygen from entering the containers before being sealed. The containers are then closed within the inert zone.
Vorteilhafterweise wird das zu verpackende Produkt unmittelbar nach der Dosierung des flüssigen Stickstoffs in die Behälter eingefüllt. Dadurch wird erreicht, daß der flüssige Stickstoff durch intensiven Kontakt mit dem Produkt rasch verdampft und der entstehende gasförmige Stickstoff den Sauerstoff aus Produkt und Behälter verdrängt.Advantageously, the product to be packaged is filled into the container immediately after the liquid nitrogen has been metered in. This ensures that the liquid nitrogen evaporates rapidly through intensive contact with the product and the resulting gaseous nitrogen displaces the oxygen from the product and the container.
Zweckmäßigerweise wird der flüssige Stickstoff in einer Menge in die Behälter eingefüllt, die ausreicht, nach Verdampfen des flüssigen Stickstoffs die Behälter und das Produkt sauerstofffrei zu spülen.The liquid nitrogen is expediently filled into the containers in an amount which is sufficient to flush the containers and the product free of oxygen after the liquid nitrogen has evaporated.
In einer bevorzugten Ausführungsform der Erfindung wird in der inerten Zone auf 40 bis 80 ° C erwärmter gasförmiger Stickstoff zugeführt. Dadurch wird die den Behältern beim Verdampfen des flüssigen Stickstoffs entzogene Wärme wieder ersetzt. Unterbliebe diese Maßnahme, so käme es nach Temperaturausgleich zu meist unerwünschten Druckerhöhungen in den Behältern.In a preferred embodiment of the invention, gaseous nitrogen heated to 40 to 80 ° C. is supplied in the inert zone. This replaces the heat extracted from the containers when the liquid nitrogen evaporates. Failure to do so would result in mostly undesirable pressure increases in the containers after temperature equalization.
Mit dem erfindungsgemäßen Verfahren wird ein sauerstofffreies Verpacken von Produkt in Behältern erreicht, ohne daß aufwendige Apparaturen, wie z.B. Vakuumpumpen und Vakuumkammern, erforderlich wären. Durch das erfindungsgemäße Verfahren wird innerhalb kurzer Zeit eine sauerstofffreie Atmosphäre in den Behältern geschaffen, die auch eine Verpackung und Aufbewahrung von sauerstoffempfindlichen Produkten gewährleistet. Auf diese Weise können z.B. Lebensmittel vor Oxidationsprozessen dauerhaft geschützt werden, so daß ihre Haltbarkeit verbessert wird.With the method according to the invention, oxygen-free packaging of the product in containers is achieved without the need for complex apparatus, such as vacuum pumps and vacuum chambers. The method 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, for example, foods can be permanently protected from oxidation processes, so that their durability is improved.
Die Erfindung eignet sich besonders zum Verpacken von stückigen Gütern, wie z.B.Nüssen, Granulaten etc., in Metallbehältern oder Kombidosen.The invention is particularly suitable for packaging lumpy goods, such as nuts, granules, etc., in metal containers or combination cans.
Eine Vorrichtung zur Durchführung des Verfahrens besteht aus einem Transportband zur Aufnahme der Behälter, einer Einfülleinrichtung für das Produkt und einer Verschließeinrichtung zum Verschließen der Behälter.A device for carrying out the method consists of a conveyor belt for receiving the containers, a filling device for the product and a closing device for closing the containers.
Erfindungsgemäß sind bei einer derartigen Vorrichtung entlang des Transportbandes nacheinander eine mit einem Vorratsbehälter für flüssigen Stickstoff verbundene Dosiereinrichtung und ein unter Inertbedingungen gehaltener Tunnel angeordnet. Ferner führen in den Innenraum des Tunnels Zufuhrleitungen für gasförmigen Stickstoff. Die Verschließeinrichtung ist innerhalb des Tunnels angeordnet.According to the invention, a metering device connected to a storage container for liquid nitrogen and a tunnel kept under inert conditions are arranged one after the other along the conveyor belt. In addition, supply lines for gaseous nitrogen lead into the interior of the tunnel. The closing device is arranged inside the tunnel.
Zweckmäßigerweise ist die Einfülleinrichtung für das Produkt zwischen der Dosiereinrichtung für flüssigen Stickstoff und dem Tunnel angeordnet.The filling device for the product is expediently arranged between the metering device for liquid nitrogen and the tunnel.
Es hat sich als vorteilhaft erwiesen, daß der Tunnel eine Länge von ca. 0,5 bis 3 m aufweist.It has proven to be advantageous that the tunnel has a length of approximately 0.5 to 3 m.
Die Erfindung wird im folgenden anhand eines in einer Zeichnung schematisch dargestellten Ausführungsbeispiels näher erläutert:The invention is explained in more detail below with reference to an exemplary embodiment shown schematically in a drawing:
Die Figur zeigt eine schematische Darstellung des Verfahrensablaufs beim erfindungsgemäßen sauerstofffreien Verpacken von Produkt in Behältern.The figure shows a schematic representation of the process sequence in the oxygen-free packaging of product according to the invention in containers.
Die zur Verpackung vorgesehenen Behälter werden an einem Transportband 2 verschiedenen Verfahrensschritten zugeführt. In einem ersten Verfahrensschritt wird flüssiger Stickstoff aus einer Dosiereinrichtung 3 über Leitung 10 in einer Menge von 10 g in einen Behälter 1 eingefüllt. Das Transportband 2 befödert den Behälter 1 weiter zu einer Einfülleinrichtung 4 für das zu verpackende Produkt 5. Dort wird das Produkt 5 in den Behälter 1 eingegegeben. Anschließend wird am Behälter 1 eine Deckelfolie 6 festgepunktet. In einer nachfolgenden als Tunnel 7 ausgebildten inerten Zone wird auf 60 °C erwärmter gasförmiger Stickstoff über Leitungen 8 zugeführt. Das Transportband 2 befördert den Behälter 1 durch den Tunnel, der eine Länge von 2 m aufweist, hindurch. Kurz vor Verlassen des Tunnels wird der Behälter 1 noch innerhalb des Tunnels durch eine als Versiegelungseinrichtung ausgebildete Verschließeinrichtung 9 verschlossen.The containers provided for packaging are fed to two different process steps on a conveyor belt. In a first process step, liquid nitrogen is filled into a container 1 from a metering device 3 via
Claims (7)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT88110877T ATE74858T1 (en) | 1987-07-09 | 1988-07-07 | METHOD AND DEVICE FOR OXYGEN-FREE PRODUCT PACKAGING. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19873722747 DE3722747A1 (en) | 1987-07-09 | 1987-07-09 | METHOD AND DEVICE FOR PACKING THE PRODUCT WITHOUT OXYGEN |
DE3722747 | 1987-07-09 |
Publications (4)
Publication Number | Publication Date |
---|---|
EP0298481A2 EP0298481A2 (en) | 1989-01-11 |
EP0298481A3 EP0298481A3 (en) | 1989-11-23 |
EP0298481B1 true EP0298481B1 (en) | 1992-04-15 |
EP0298481B2 EP0298481B2 (en) | 1995-01-18 |
Family
ID=6331262
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88110877A Expired - Lifetime EP0298481B2 (en) | 1987-07-09 | 1988-07-07 | Method and device for the oxygen-free packaging of products |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0298481B2 (en) |
AT (1) | ATE74858T1 (en) |
DE (2) | DE3722747A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3912153C1 (en) * | 1989-04-13 | 1990-08-02 | Christoph V. Dr.Rer.Nat. Stein | Preventing deterioration of solns. by oxidn. - by feeding solns. in containers from which air has been expelled by injected protective gas |
ES2070026B1 (en) * | 1991-12-12 | 1996-04-16 | Canariense Tabacos | PACKAGING PROCEDURE FOR CIGARS. |
US7060905B1 (en) | 2001-11-21 | 2006-06-13 | Raytheon Company | Electrical cable having an organized signal placement and its preparation |
WO2004058573A1 (en) * | 2002-12-20 | 2004-07-15 | Cfs Germany Gmbh | Packaging machine path comprising a device for impinging a gaseous or volatile substance upon packagings |
DE10311334A1 (en) * | 2002-12-20 | 2004-07-08 | Cfs Germany Gmbh | Packaging machine line with device for loading the packaging with a gaseous or volatile substance |
DE102006002554A1 (en) * | 2006-01-18 | 2007-07-19 | Sig Technology Ag | Process for preserving oxygen-sensitive products and a support element |
US20120152791A1 (en) * | 2010-12-20 | 2012-06-21 | Air Liquide Industrial U.S. Lp | Method for effective de-oxygenation of product containers for use as containers for oxygen sensitive products |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2917880A (en) * | 1957-04-24 | 1959-12-22 | Owens Illinois Glass Co | Method of and apparatus for packaging food products |
US3477192A (en) * | 1967-03-02 | 1969-11-11 | American Cyanamid Co | Container filling process |
GB2089181B (en) * | 1980-12-15 | 1984-02-01 | Dearn Peter Thomas | An anchor especially an angler's sinker weight |
GB2125937B (en) * | 1982-08-26 | 1986-06-25 | Metal Box Plc | Dispensing volatile liquids |
EP0173763A1 (en) * | 1984-09-07 | 1986-03-12 | RAKU Kunststoff-Verpackungswerke GmbH | Package for filler material and a method for packaging filler material |
DE3625081A1 (en) * | 1986-07-24 | 1988-02-04 | Lieder Maschinenbau Gmbh & Co | METHOD AND DEVICE FOR THE PRESERVATION OF GOODS INCLUDED IN A CONTAINER |
-
1987
- 1987-07-09 DE DE19873722747 patent/DE3722747A1/en not_active Ceased
-
1988
- 1988-07-07 DE DE8888110877T patent/DE3870057D1/en not_active Expired - Fee Related
- 1988-07-07 AT AT88110877T patent/ATE74858T1/en not_active IP Right Cessation
- 1988-07-07 EP EP88110877A patent/EP0298481B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE3870057D1 (en) | 1992-05-21 |
EP0298481B2 (en) | 1995-01-18 |
EP0298481A3 (en) | 1989-11-23 |
EP0298481A2 (en) | 1989-01-11 |
DE3722747A1 (en) | 1989-01-19 |
ATE74858T1 (en) | 1992-05-15 |
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