EP0255648B1 - Verfahren und Vorrichtung zur Konservierung von in einem Behälter eingeschlossener Ware - Google Patents

Verfahren und Vorrichtung zur Konservierung von in einem Behälter eingeschlossener Ware Download PDF

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Publication number
EP0255648B1
EP0255648B1 EP87110519A EP87110519A EP0255648B1 EP 0255648 B1 EP0255648 B1 EP 0255648B1 EP 87110519 A EP87110519 A EP 87110519A EP 87110519 A EP87110519 A EP 87110519A EP 0255648 B1 EP0255648 B1 EP 0255648B1
Authority
EP
European Patent Office
Prior art keywords
gas
tub
region
sealing
cover
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
Application number
EP87110519A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0255648A3 (en
EP0255648A2 (de
Inventor
Hans Faltum
Helmut Grüne
Manfred Nordmeyer
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.)
Lieder Maschinenbau GmbH and Co KG
Original Assignee
Lieder Maschinenbau GmbH and Co KG
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 Lieder Maschinenbau GmbH and Co KG filed Critical Lieder Maschinenbau GmbH and Co KG
Priority to AT87110519T priority Critical patent/ATE83996T1/de
Publication of EP0255648A2 publication Critical patent/EP0255648A2/de
Publication of EP0255648A3 publication Critical patent/EP0255648A3/de
Application granted granted Critical
Publication of EP0255648B1 publication Critical patent/EP0255648B1/de
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

Definitions

  • the invention relates to a method for preserving goods filled in a cup, which is to be covered with a cover, in the head space, which limits the goods in the area of the cup rim, a preservation gas is entered and the cover of which is to be sealed.
  • the invention relates to a device for carrying out the aforementioned method with a transport device that transports the cups from a filling position to a gassing position in which gas is added and to a closing device that closes the containers in a pressure-tight manner.
  • EP-A-0063 235 it is known to fill cups with food.
  • a lid is placed on the mug filled with food and fixed in at least one position on the rim of the mug. Then the lid is raised slightly on one side, preferably on the tear-open tab, and the protective gas is blown through the gap formed thereby. Then the lid is welded on.
  • the lid can be raised, for example, by means of a part over which the tear tab slides, or by means of a gas nozzle for blowing in the protective gas.
  • the process known from this document consists in flushing the preservation gas through a partially sealed cup.
  • This method does not lead to a complete filling of the head space with gas, since the gas which penetrates into the head space below the lid fixed by welding points or by holding-down devices emerges again on the opposite side of the cup without it filled the entire headspace.
  • a gas flow is formed in the head space immediately below the fixed lid, without the gas flow therefore penetrating into the head space as far as the food already filled.
  • the object of the present invention is to improve the method of the type mentioned in the introduction in such a way that air fractions are reliably removed from the head space except for very small residual quantities and the cups largely retain their shape after they have been closed.
  • This object is achieved in that a liquefied preservation gas is filled in and the expansion of the preservation gas displaces the air from the headspace, a gas-tight, partial sealing of the cover is carried out and at least one expansion channel is maintained through which the air is expelled and a subsequent residual sealing is carried out in a gas channel filled with preservation gas after the pressure in the headspace in the headspace has been released to approximately the pressure prevailing in the gas channel.
  • the relaxing gas expels the air or oxygen fractions from the head space of the still open container without an equilibrium being established in the head space of the container between the relaxing gas on the one hand and an air atmosphere surrounding the head space on the other. Rather, the expansion of the liquefied gas present in the headspace takes place within the gas atmosphere, so that components of this gas atmosphere penetrate into the headspace instead of the air or oxygen components expelled from the headspace. This exchange takes place until the pressure of the liquefied gas introduced into the head space has adjusted to the gas atmosphere, so that after a final pressure-tight sealing of the beaker a re-evaporation of any liquid gas components that are still present within the head space cannot take place.
  • the container is pre-sealed to an expansion channel through which expanding gas is conducted into the gas atmosphere until a pressure prevailing in the container has released into the gas atmosphere, within which the container is sealed in a pressure-tight manner .
  • the expansion channel through which it can escape into the gas atmosphere is available to the evaporating gas.
  • the gas exchange can be limited specifically to the gas atmosphere, which only has to be present at a certain point within a gas channel.
  • the essentially already closed head space is completely filled with the gas evaporating from the liquefied gas.
  • the container is sealed in a partial sealing area and gassed with liquefied gas through a gassing area lying outside this partial sealing area, then the gassing area is further sealed after the gassing has been carried out except for an open expansion channel, through which the expanding gas leads into the gas atmosphere until a pressure prevailing in the container relaxes in the gas atmosphere within which the container is sealed in a pressure-tight manner.
  • the container is already partially sealed before the liquefied gas the headspace is introduced. In this way, the head space for the evaporating gas is already closed before the gas is introduced into the head space in liquid form.
  • a device for preserving the goods filled into a cup can be found, for example, in EP-A-0063235.
  • the links on a conveyor belt convey the plastic cups to the individual work stations in cycles.
  • the dosing device for the product to be filled is located above the plastic cup.
  • a work station is located above the plastic cup of the lid storage container.
  • a lid is already on the plastic cup.
  • purging takes place with protective gas, which is fed through the gas nozzle.
  • the lid is slightly raised from the edge of the plastic cup, on one side through the gas nozzle and on the other side through the escaping gas.
  • the lid is fixed on the edge of the plastic cup by two hold-down devices.
  • the last workstation finally shows the plastic cup with the lid, which is welded onto the edge of the plastic cup with the help of the welding head.
  • the lid placed on it must be fixed disadvantageously by a holding-down device or by welding spots before the preservation gas is blown in.
  • the penetration of air into the head space via the space between the cover and the rim of the cup is not adequately prevented.
  • the object of the present device is therefore to to improve this device so that air or oxygen portions of gas are expelled completely and at the same time inexpensively from the headspace before the cup is sealed.
  • the sealing device arranged in front of the closing device which seals the cover with the cup only in a substantial part of its cup edge and thus leaves a smaller part of the circumference of the cup edge unsealed, ensures that the unsealed part acts as a gas channel, via which an expansion of the Gas can be made in the interior of the cup.
  • a device suitable for carrying out the method according to the invention essentially consists of a transport device 1 which has at least one recess 2 for receiving a cup 3 to be closed, at least one pre-sealing head 4, an end sealing head 5, a gassing device 6 and a gas channel 7.
  • the cup 3 is held in the recess 2.
  • the transport device 1 consists essentially of plates 8 which are connected to drive chains 10 which move them by means of driving pins 9.
  • the drive chains 10 extend substantially parallel to a transport direction 11 of the cups 3.
  • the driver pins 9 have longitudinal axes 12 which are oriented essentially at right angles to the transport direction 11.
  • the drive chains 10 are guided over deflection rollers 13 which, together with the drive chains 10 and the plates 8, form a device similar to a conveyor belt.
  • Limits 14 of the plates 8 moved in the transport direction 11 arranged upwards in the vertical direction are arranged approximately in a conveying plane 15 which runs essentially horizontally.
  • a plane lies transversely to the conveying plane, which plane is oriented in the transport direction 11 and in which the transport device 1 is moved.
  • At least one sealing element 16 is arranged between each two plates 8, which is approximately bead-shaped and extends with its longitudinal axis approximately at right angles to the transport direction 11 and parallel to the conveying plane 15.
  • a cup 3 essentially consists of a base 17, a wall 18 which protrudes approximately perpendicularly from the base 17 and a cup edge 20 which surrounds the wall 18 in the region of its boundary 19 oriented vertically upwards.
  • the cup edge 20 extends essentially horizontally.
  • the bottom 17, the wall 18 and the cup rim 20 are preferably made of a uniform material, which is made of plastic, for example.
  • a cup interior 21 is delimited by the wall 18 and the bottom 17 and can be filled with a product 23 through a filling opening 22 which is arranged in the region of the cup rim 20 and runs essentially horizontally.
  • each of the plates 8 there is a recess 24 surrounding the recess 2, which runs approximately parallel to the conveying plane 15 with its lower boundary 25 facing the cup edge 20.
  • the depression 24 Perpendicular to the conveying plane 15, the depression 24 has an extent which corresponds approximately to the thickness, measured in the vertical direction, of the cup rim 20 surrounding the cup 3 in the region of its filling opening 22.
  • a dispensing opening 27 of a goods dispensing device 28 filling the cup 3.
  • the product 23 to be allocated is enclosed by a storage container 29, which has a connection 30 to the distribution opening 27 that guides the product 23.
  • a metering device 31 is provided, which is connected to a metering control 32 that actuates it.
  • the goods 23 can be, for example, foods such as dairy products, salads or ready meals, but it is also possible to preserve other goods 23, for example components or technical pastes to be protected from environmental influences.
  • a gassing position 33 is provided in the transport direction 11 behind the filling position 26, above which a gassing device 34 is arranged in the vertical direction.
  • the gassing device 34 consists essentially of a gas storage container 35, one of a wall 36 has enclosed interior 37 in which gas 38 is stored.
  • the interior 37 is connected to a gas metering device 39, which is designed, for example, as a tube or hose.
  • the gas metering device 39 has a gas metering opening 40 which is arranged in the vertical direction directly above the goods 23 filled into the cup 3.
  • a gas metering device 41 is provided, which is designed, for example, as a valve.
  • the gas metering device 41 is connected to a gas metering control 42 that actuates it.
  • the gas 38 is preferably fed to the cup 3 as a liquefied gas which is distributed in the region of a head space 57 arranged above the goods 23 and below the upper boundary 19 of the cup wall 18, but it is also possible for the gas 38 to be in gaseous form in the cup 3 Condition.
  • the gassing position 33 is followed by a film feed position 43, in the area of which a film metering device 45, which provides the cup 3 with a cover 44, is arranged.
  • the cover 44 extends over the entire filling opening 22 and lies in the region of the cup rim 20, the cup rim 20 being at least partially covered by the cover 44.
  • a pre-sealing position 46 is provided in the transport direction 11 behind the gassing position 33, and the pre-sealing head 4 is arranged in the vertical direction above this.
  • the pre-sealing head 4 has a pre-sealing contour 47 in the direction of the cup 3, which extends approximately horizontally in the substantial area of its extent and in a smaller area of its extent, which is arranged in the area of a boundary 48 that laterally closes the pre-sealing head 4, one in a vertical direction Has curvature 49 oriented upward.
  • an expansion channel 50 remains in the region of the curvature 49, which is located between a lower boundary facing the cup 3 51 of the cover 44 and one of the cover 44 facing the upper boundary of the cup edge 20 extends.
  • the pre-sealing head 49 is connected to a movement element 56 positioning it in an approximately vertical direction.
  • positions 26, 33, 43 and 46 are provided in a different arrangement than the sequence described.
  • the filling position 26 is followed by the film feed position 43, followed in the conveying direction 11 by the pre-sealing position 46 and the gassing position 33.
  • the pre-sealing head 4 has a contour that the cup edge 20 at least in an area 53 that extends transversely to the direction of transport 11 over the entire extent of the rim 20 of the cup, at most covering it away from it.
  • the pre-sealing head can be designed, for example, in such a way that it does not cover the relevant area of the cup rim 20, but it is also possible for the pre-sealing contour 47 to have a curvature oriented upwards in this area.
  • the area 53 preferably extends in an area of the cup rim 20 opposite the expansion channel 50 with respect to the interior 21, but it is also possible for the area 53 and the expansion channel 50 to overlap at least partially.
  • a support rail 54 is arranged in the area of positions 43, 46 and 33 and extends with its longitudinal axis essentially in the direction of transport 11.
  • the support rail 54 extends with its lower limit facing the cup 3 immediately above the upper limit 52 of the cup rim 20 facing it. Transversely to the transport direction 11, the support rail 54 extends at least partially between the cup edge 20 and the cover 44 resting thereon.
  • the support rail 54 preferably has a rounded contour 55 in its area facing the support 44.
  • a bore 61 extends through the support rail 44 transversely to the conveying direction 11 and has an opening 62 in the region of the cup interior 21. At its end facing away from the opening 62, the bore 61 has a further opening 63 which connects the bore 61 to the gas metering device 39.
  • a further sealing position 58 follows from the gassing position 33, above which a further sealing head 59 is arranged in the vertical direction, which is connected to a movement element 60 that positions it and contacts the cover 44 in the region 53 of the cup rim 20.
  • the gas channel 7 follows the already mentioned positions 26 to 46 and 43 to 58.
  • the gas channel 7 extends essentially in the transport direction 11 and covers the cup 3 arranged in a pre-expansion position 64 transversely to the transport direction 11 at least in the region of the expansion channel 50.
  • the pre-expansion position 64 is arranged behind the positions 26 to 46 and 43 to 58 in the transport direction 11.
  • the gas channel 11 is arranged in the vertical direction immediately above the conveying plane 15 and is sealed off from the plates 8 with at least one seal 65, which is designed, for example, as a rubber seal.
  • the gas channel 7 is preferably divided into individual chambers 66 which are separated from one another by at least one non-return valve 67 which is oriented substantially perpendicularly and extends transversely to the transport direction 11.
  • the non-return flap 67 can be pivoted about an axis of rotation 69 which is oriented transversely to the transport direction 11 and is arranged in the region of an upper cover 68 of the gas channel 7 which runs approximately parallel to the conveying plane 15.
  • a pre-expansion chamber 70 is arranged in the area of the pre-expansion position 64, the composition of the gas contained in an interior 71 of the pre-expansion chamber 70 is determined by at least one gas measuring device 72.
  • the Gas measuring device 72 is designed, for example, as an oxygen sensor, but it is also possible to measure other or further gases.
  • the pre-expansion chamber 70 is followed by a further expansion chamber 73 and an end expansion chamber 74.
  • Gas measuring devices 72 are also arranged in the region of these chambers.
  • the end expansion chamber 74 is adjoined in the transport direction 11 by an end sealing chamber 75, in the area of which the end sealing head 5 is arranged in the vertical direction above the conveying plane 15 and is connected to a movement element 76 positioning it in the vertical direction.
  • At least one gas measuring device 72 is also arranged in the region of the final sealing chamber 75.
  • a turbulence-reducing insert 77 is provided in the final sealing chamber 75, which is preferably designed as a Teflon insert.
  • At least one of the chambers 70, 73, 74 and 75 is connected via at least one gas supply line 78 to a gas supply 79, which preferably feeds the gas channel 7 with the same gas that is supplied to the cup 3 in the gassing position 33.
  • a gas supply 79 which preferably feeds the gas channel 7 with the same gas that is supplied to the cup 3 in the gassing position 33.
  • the gas supply 79 and the gas storage container 35 it is possible for the gas supply 79 and the gas storage container 35 to form a single part.
  • Each of the chambers 70, 73, 74 and 75 preferably has at least one gas supply line 78.
  • a heater 80 can be provided at least in the area of one of these chambers, which is preferably arranged in the area of the upper cover 68.
  • the heater is connected to a temperature control.
  • the preservation of the goods 23 is carried out in such a way that the cup 3 is first filled with the goods 23 in the filling position 26 and then brought into a further processing position by the transport device 1.
  • This further processing position can be the gassing position 33, preferably in the gas 38 is introduced into the head space 57 of the cup 3 in the liquefied state.
  • the gas 38 begins to expand or change from the liquid to the gaseous state and thereby displaces the circulating air present in the head space, in particular also the oxygen, from the area of the head space 57.
  • the cup becomes 3 then provided with the cover 44, which is permanently connected to the cup 3 in the pre-sealing position 46.
  • the cover 44 can be, for example, a plastic or metal foil, but other covers are also possible which permit a gas-tight closure of the cup 3.
  • the cup 3 After passing through the film feed position 43, the cup 3 is pre-sealed in the pre-sealing position 46.
  • the cover is connected in a gas-tight manner at least in a pre-sealing area 81, which is arranged in the area of the cup rim 20.
  • the cup 3, after it has been filled with goods 23, is first connected in the pre-sealing position 46 in a partial sealing area 82 to the cup rim 20, which represents a partial area of the pre-sealing area 81.
  • the area of the cover 44 which is not connected to the cup edge 20 lies on the support rail 54, through the opening 61 of which gas 38 is introduced into the cup 3 in the gassing position 33. Since the cup 3 is already largely closed by the cover 44 in this position, the gas 38 can only escape from the head space 57 in the area of the expansion channel 50 and in the area of the support rail 54. After gassing the head space, the cup is closed in the further sealing position 58 except for the area of the expansion channel 50.
  • the further sealing head 59 connects the cover 44 to the cup rim 20 in a gas-tight manner at least in one further sealing region 83.
  • the gas 38 escapes from the head space 57 through the expansion channel 50 to a residual content determined by the ambient pressure and almost completely leads the ambient air contained in the head space 57 out of the area of the head space 57.
  • Gas 38 is supplied to the gas channel through gas supply lines 78, ambient air components are thereby displaced from the interior of the gas channel 7. This prevents that after complete expansion of the gas 38 enclosed in the head space 57, ambient air penetrates into the head space 57 through the expansion channel 50.
  • the expansion of gas 38 is monitored by gas meters 72 and controlled by heater 80. After the gas 38 has completely expanded, the cup is closed completely gas-tight by the end sealing head 5, which connects the cover 44 to the cup edge 20 at least in one end sealing area 84. The penetration of ambient air into the gas channel 7 is largely avoided by the seal 65 sealing the gas channel 7 with respect to the transport device 1.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vacuum Packaging (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
  • Closing Of Containers (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
EP87110519A 1986-07-24 1987-07-21 Verfahren und Vorrichtung zur Konservierung von in einem Behälter eingeschlossener Ware Expired - Lifetime EP0255648B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87110519T ATE83996T1 (de) 1986-07-24 1987-07-21 Verfahren und vorrichtung zur konservierung von in einem behaelter eingeschlossener ware.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863625081 DE3625081A1 (de) 1986-07-24 1986-07-24 Verfahren und vorrichtung zur konservierung von in einem behaelter eingeschlossener ware
DE3625081 1986-07-24

Publications (3)

Publication Number Publication Date
EP0255648A2 EP0255648A2 (de) 1988-02-10
EP0255648A3 EP0255648A3 (en) 1989-02-01
EP0255648B1 true EP0255648B1 (de) 1992-12-30

Family

ID=6305905

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87110519A Expired - Lifetime EP0255648B1 (de) 1986-07-24 1987-07-21 Verfahren und Vorrichtung zur Konservierung von in einem Behälter eingeschlossener Ware

Country Status (6)

Country Link
US (1) US5071667A (enrdf_load_stackoverflow)
EP (1) EP0255648B1 (enrdf_load_stackoverflow)
AT (1) ATE83996T1 (enrdf_load_stackoverflow)
CA (1) CA1307160C (enrdf_load_stackoverflow)
DE (2) DE3625081A1 (enrdf_load_stackoverflow)
DK (1) DK169914B1 (enrdf_load_stackoverflow)

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Also Published As

Publication number Publication date
DK169914B1 (da) 1995-04-03
CA1307160C (en) 1992-09-08
EP0255648A3 (en) 1989-02-01
DE3625081C2 (enrdf_load_stackoverflow) 1993-08-19
DE3783284D1 (de) 1993-02-11
EP0255648A2 (de) 1988-02-10
DK384287A (da) 1988-01-25
DE3625081A1 (de) 1988-02-04
US5071667A (en) 1991-12-10
ATE83996T1 (de) 1993-01-15
DK384287D0 (da) 1987-07-23

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