NL2014363B1 - System for degassing a package. - Google Patents

System for degassing a package. Download PDF

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Publication number
NL2014363B1
NL2014363B1 NL2014363A NL2014363A NL2014363B1 NL 2014363 B1 NL2014363 B1 NL 2014363B1 NL 2014363 A NL2014363 A NL 2014363A NL 2014363 A NL2014363 A NL 2014363A NL 2014363 B1 NL2014363 B1 NL 2014363B1
Authority
NL
Netherlands
Prior art keywords
opening
lid
package
sealing surface
suction device
Prior art date
Application number
NL2014363A
Other languages
Dutch (nl)
Inventor
Leonardus Cornelus Aarts Mathias
Original Assignee
Oxipack Holding B V
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 Oxipack Holding B V filed Critical Oxipack Holding B V
Priority to NL2014363A priority Critical patent/NL2014363B1/en
Priority to PCT/NL2016/050139 priority patent/WO2016137326A1/en
Application granted granted Critical
Publication of NL2014363B1 publication Critical patent/NL2014363B1/en

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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or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied
    • B65B31/046—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or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied the nozzles co-operating, or being combined, with a device for opening or closing the container or wrapper
    • B65B31/047—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or gasifying filled containers or wrappers by means of nozzles through which air or other gas, e.g. an inert gas, is withdrawn or supplied the nozzles co-operating, or being combined, with a device for opening or closing the container or wrapper the nozzles co-operating with a check valve in the opening of the container or wrapper
    • 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
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0207—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features
    • B65D1/0215—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by material, e.g. composition, physical features multilayered
    • 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
    • B65D23/00—Details of bottles or jars not otherwise provided for
    • B65D23/08—Coverings or external coatings
    • B65D23/0842—Sheets or tubes applied around the bottle with or without subsequent folding operations
    • B65D23/0864—Applied in mould
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/18—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on either side
    • F16K17/19—Equalising valves predominantly for tanks
    • F16K17/196—Equalising valves predominantly for tanks spring-loaded
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2226—Sampling from a closed space, e.g. food package, head space

Abstract

System and method for degassing a package. The package includes a packaging film enclosing an inner space and a substantially rigid element connected to the packaging film along a circumferential sealing contour. The element has an opening within the contour for allowing gas to enter or leave the inner space and a sealing surface surrounding the opening. A lid is arranged and an actuator is provided for selectively moving the lid from a first to a second position. In the first position the lid is offset relative to the sealing surface so as to allow gas to enter or leave the inner space. In the second position the lid sealingly abuts against the sealing surface for closing the opening. With the lid in the first position the inner space is degassed. The opening is closed by operating the actuator so as to move the lid into the second position.

Description

Title: System for degassing a package
FIELD OF THE INVENTION
The present invention relates evacuating packages. More in particular the invention relates to evacuating bulk packages. The invention also relates to filling packages with controlled atmospheres and/or testing the atmosphere inside packages.
BACKGROUND TO THE INVENTION
It is known to evacuate a package, such as a vacuum package filled with a product such as nuts, wherein the package is at least partially made of packaging film and wherein use is made of a suction device provided with a suction opening, for evacuating the package through an aperture in the packaging film. Such packages can be bulk packages of e.g. approximately 1000 liters. A method for evacuating a packaging is for example known from W02008/022815A1. In this known method, the packaging film includes an opening that does not register with an opening of an underlying plate, and suction by the suction device lifts the packaging film off the plate to allow for air flow between the non-registering openings.
The known methods have the drawback that evacuating the package is performed at relatively slow rates. Also, the known methods have the drawback that it is cumbersome to sample the gaseous content of the package after closing of the package, e.g. as part of quality control.
SUMMARY OF THE INVENTION
It is an object of the invention to obviate or at least diminish the above disadvantages. It is also an object of the invention to provide an improved method for degassing and/or (re)gassing a package.
Thereto according to the invention is provided a method for degassing a package. The package includes a packaging film enclosing an inner space holding a product. The package includes a substantially rigid element connected to the packaging film along a circumferential sealing contour. The element has an opening within the contour for allowing gas to enter or leave the inner space. The element has a sealing surface surrounding the opening. The method includes sealingly abutting a suction device against an outer side of the package, at a location of the substantially rigid element. The method further includes providing a lid arranged for sealingly abutting against the sealing surface for closing the opening, and an actuator for selectively moving the lid from a first to a second position. In the first position the lid is offset relative to the sealing surface so as to allow gas to enter or leave the inner space. In the second position the lid sealingly abuts against the sealing surface for closing the opening. The method further includes with the lid in the first position operating the suction device for degassing the inner space. The method further includes closing the opening by operating the actuator so as to move the fid into the second position.
The fid is a separate part of the package, separate from the packaging film. It will be appreciated that providing the lid as a separate part of the package provides the advantage that the lid can be lifted off the sealing surface so as to provide an aperture of relatively large cross section. The cross section can be much larger than when lifting the packaging film itself off the substantially rigid element. Therefore degassing, and (re)gassing, can be effected at much larger flow rates.
Optionally, the lid is a substantially rigid lid. This allows for easy moving of the lid from the first to the second position.
Optionally, the fid can be moved from the first position to the second position and vice versa. This allows for closing and re-opening, for instance repeated closing and opening, of the package. It will be appreciated that the lid may for instance be re-opened for sampling a pressure inside the package. Alternatively, or additionally, the fid may be re-opened for sampling a gaseous content in the package, e.g. for determining a composition of the gaseous content, and/or for determining a partial pressure of a constituent gas, such as oxygen.
Optionally, e.g. after degassing the inner space and prior to closing the opening, the package is filled with an inert gas.
Optionally, the actuator is operated by gas pressure. The actuator ma e.g. be operated by an underpressure.
The invention also relates to a packaging system. The packaging system includes a package including a packaging film enclosing an inner space for holding a product. The packaging system also includes a suction device for removing gas from the inner space. The packaging system includes a substantially rigid element connected to the packaging film along a circumferential sealing contour. The element has an opening within the contour for allowing gas to enter or leave the inner space. The element further has a sealing surface surrounding the opening. The packaging system includes a fid arranged for sealingly abutting against the sealing surface for closing the opening. The packaging system includes an actuator for selectively moving the fid from a first to a second position. In the first position the lid is offset relative to the sealing surface so as to allow gas to enter or leave the inner space. In the second position the lid sealingly abuts against the sealing surface for closing the opening.
The system with the actuatable fid allows for easy closing and/or opening of the package. Also, positioning the fid in the first position allows for a relatively large aperture between the fid and the substantially rigid element, allowing for degassing and/or (re)gassing at large flow rates. This decreases the time needed for degassing and/or (re)gassing.
Optionally, the actuator is part of the package. This provides the advantage that the package has a self-contained actuatable mechanism, allowing actuating of the lid at will. Thus, for instance a pressure and/or a gaseous content of the package can easily be checked by re-actuating the fid.
Optionally, the actuator is part of the suction device. This provides the advantage that the package may be at a smaller cost. Also, this may prevent accidental actuation, since the actuator has to be consciously applied to the package.
Optionally, the actuator includes a biasing element for biasing the hd towards the second position. This provides the advantage that the lid will be in the second position, i.e. closed, when not actively actuated. The biasing element may e.g. be a resilient element, such as an O-ring. It is also possible that the biasing element forms part of the package, e.g. when the actuator is part of the suction device.
Optionally, the actuator is arranged for drawing the hd towards the first position by means of underpressure. Optionally, a pump used for degassing the inner space is also used for actuating the actuator. It is also possible that the actuator is actuated differently, e.g. by means of an electromagnet, pressurized gas, hydraulics or the like.
Optionally, the suction device has a first connection for being in fluid communication with the opening for degassing the inner space and a second connection for being in fluid communication with the actuator. The first connection can e.g. be a first port for a first vacuum fine. The second connection can e.g. be a second port for a second vacuum fine.
Optionally, the packaging system includes a control unit arranged for controlling the actuator and for controlling degassing and/or (re)gassing of the package. The control unit may be arranged for automating the process. The control unit may be arranged for first bringing or keeping the lid in the first position, then degassing the package and subsequently brining the hd into the second position.
Optionally, the package further includes a valve for allowing sampling of a gaseous content of the packaging after closing of the opening. The valve can e.g. be a check valve. The valve can be formed by two abutting membranes, each membrane having an aperture, the apertures being sideways offset relative to each other. The valve allows for creating a closeable opening in the package. Preferably, a flow capacity of the valve is much smaller than a flow capacity provided by the opened lid. Therefore, opening the valve may not introduce the risk of sudden degassing of the package. However, opening of the valve does allow samphng of the gaseous content of the package, e.g. for determining a pressure inside the package and/or a composition and/or a partial pressure of a constituent gas in the package.
Optionally, the valve is part of the lid. Since the lid overlies the opening in the substantially rigid member, providing the valve in the lid obviates the need for an additional opening through the package wall.
Optionally, the suction device includes a valve deactivator for deactivating the valve while the lid is in the first position. It will be appreciated that the valve could allow gas to pass through while the actuator tries to suck the lid into the first position. Therefore, it can be advantageous to deactivate the valve when the lid is in or close to the first position.
Optionally, the suction device includes an inner suction device and an outer suction device. The inner suction device bears against the substantially rigid element. The inner suction device abuts against the substantially rigid element or against the packaging film overlying the substantially rigid element. The outer suction device does not bear against the substantially rigid element. The outer suction device abuts the packaging film in an area not overlying the substantially rigid element. The inner suction device is arranged for actuating the lid. The outer suction device is arranged for evacuating the package. This provides the advantage that the powder is not, or at least less, compacted underneath the substantially rigid element upon evacuating the package. Hence, evacuation speed can be increased.
The invention also relates to a package of the packaging system. The package can include a packaging film enclosing an inner space for holding a product. The package can include a substantially rigid element connected to the packaging film along a circumferential sealing contour. The element has an opening within the contour for allowing gas to enter or leave the inner space. The element further has a sealing surface surrounding the opening. The package can also include a lid arranged for sealingly abutting against the sealing surface for closing the opening.
Optionally, the package includes an actuator arranged for selectively moving the lid from a first to a second position. In the first position the lid is offset relative to the sealing surface so as to allow gas to enter or leave the inner space. In the second position the fid sealingly abuts against the sealing surface for closing the opening. Optionally , the package further includes a valve for allowing sampling of a gaseous content of the packaging after closing of the opening. The valve can e.g. be placed in the fid.
The invention also relates to a kit of parts including a substantially rigid element arranged to be connected to a packaging film along a circumferential sealing contour, the element having an opening within the contour for allowing gas to pass through, the element further having a sealing surface surrounding the opening and a hd arranged for sealingly abutting against the sealing surface for closing the opening. It will be appreciated that the kit of parts is suitable to be used in connection with a package formed by a packaging film enclosing an inner space for holding a product. The substantially rigid element can e.g. be connected to the packaging film at the circumferential sealing contour.
Optionally the kit of parts further includes an actuator for selectively moving the lid from a first to a second position, wherein in the first position the lid is offset relative to the sealing surface for allowing gas to pass through the opening, and wherein in the second position the lid sealingly abuts against the sealing surface for closing the opening. The lid may include a valve for allowing sampling of a gaseous content across the hd.
BRIEF DESCRIPTION OF THE DRAWINGS
Embodiments of the present invention will now be described in detail with reference to the accompanying drawings in which:
Figure la is a schematic exploded view of an embodiment of a package part;
Figure lb is a schematic view of the package part in a first mode; Figure lc is a schematic view of the package part in a second mode;
Figure 2 is a schematic view of an embodiment of a suction device; Figure 3a is a schematic view of an embodiment of a packaging system;
Figure 3b is a schematic view of the packaging system in a first mode;
Figure 4a is a schematic view of an embodiment of a packaging system;
Figure 4b is a schematic view of the packaging system in a first mode;
Figure 4c is a schematic view of the packaging system in a fourth mode;
Figure 4d is a schematic representation of a diagram representing pressure as a function of time;
Figure 5a is a schematic exploded view of an embodiment of a packaging system;
Figure 5b is a schematic view of the packaging system in a first mode;
Figure 5c is a schematic view of the packaging system in a second mode;
Figure 6 is a schematic view of a packaging system; and
Figure 7 is a schematic view of a packaging system.
DETAILED DESCRIPTION
Figure la shows a schematic exploded view of a package part 1. In this example, the package part 1 includes a substantially rigid element 2. The element 2 has an opening 4. The element 2 further has a first sealing surface 6 surrounding the opening 4. In this example the first sealing surface includes a first O-ring 6. The package part 1 further includes a lid 8. The lid also has a sealing surface 20 for sealing against the first sealing surface 6 of the element 2.
Figure lb shows a schematic view of the package part 1 shown in exploded view in Figure la. In Figure lb the package part is shown in a first mode. In Figure lb the lid 8 abuts against the first sealing surface 6, in this example against the first O-ring 6. The lid 8 is biased in abutment against the first sealing surface 6 by a biasing element 10 such as a second O-ring 10A. The second O-ring 10A is held in place by a retainer 12.
Figure lc shows a schematic view of the package part 1 in a second mode. In Figure lc the lid 8 is offset relative to the first sealing surface 6. In this example the lid is offset in a direction orthogonal to a main surface of the element 2. In this example in the second mode the fid 8 compresses the second O-ring 10A.
Herein the lid is said to be in the second position when the lid abuts against the sealing surface. The lid is said to be in the first position when the lid is offset relative to the sealing surface so as to allow gas to enter or leave the inner space.
Figure 2 shows a schematic view of an embodiment of a suction device 14. The suction device 14 includes a first fluid connection 16 for connection to a degassing or gassing device such as a vacuum pump or a source gas, such as inert gas. In this example, the first fluid connection 16 includes a valve 18 for selectively opening and closing the first fluid connection. In this example, the suction device 14 includes third sealing surface 22 and a fourth sealing surface 24. Here the third sealing surface 22 is a circumferential sealing surface, such as an O-ring. Here the fourth sealing surface 24 is a circumferential sealing surface, such as an O-ring. Here the third sealing surface 22 circumscribes the fourth sealing surface 24. In this example the fourth sealing surface 24 is substantially concentric with the third sealing surface 22. In this example the first fluid connection 16 is in fluid communication with a first area 26 between the third and fourth sealing surfaces 22, 24. In this example, the suction device 14 includes a second fluid connection 28 for connection to a degassing or gassing device such as a vacuum pump or a source gas, such as inert gas. In this example, the second fluid connection 28 includes a valve 30 for selectively opening and closing the second fluid connection. In this example the second fluid connection 28 is in fluid communication with a second area 32 circumscribed by the fourth sealing surface 24.
Figure 3 a shows a schematic representation of an embodiment of a packaging system 34. This exemplary packaging system 34 includes a package part 1 as described in relation to Figures la, lb and lc and a suction device 14 as described in relation to Figure 2. Further the packaging system 34 includes a package 36. The package 36 includes a packaging film 38, enclosing an inner space 40 for holding a product. The package part 1 is attached to the packaging film 38. The packaging film 38 includes an aperture 42. The package part 1 is sealingly attached to a circumferential contour of the packaging film 38 surrounding the aperture 42. In the example of Figure 3a the package part 1 is attached to an inner side of the packaging film 38. It will be appreciated that it is also possible that the package part 1 is attached to an outer side of the packaging film 38.
In Figure 3a the suction device 14 abuts against the package part 1. It will be appreciated that the suction device 14 may be displaceable relative to the packaging part 1, i.e. the suction device 14 may selectively abut against the package part 1 or be located elsewhere, e.g. in storage during non-use of the suction device 14. In Figure 3a the suction device 14 abuts against the package part 1 such that the first area 26 is in fluid communication with the opening 4 when the fid 8 is in the first position. In this example thereto the retainer 12 includes a first aperture 44, or a plurality of first apertures 44, for allowing fluid communication between the first area 26 and the opening 4 when the fid 8 is in the first position. In Figure 3a the suction device 14 abuts against the package part 1 such that the second area 32 is in fluid communication with an upper surface of the fid 8. Thereto in this example the retainer includes a second aperture 46.
The packaging system 34 as described thus far can be operated as follows. A package 36 is provided. The package 36 is provided with the package part 1. The package 36 can be filled with a product, such as nuts, coffee, milk powder or the like. Thereto the package 36 may include a filling opening that is hermetically sealed after filling of the package 36. The lid 8 is in the second position, biased in abutment against the first sealing surface 6 by the biasing element 10 so that the lid hermetically seals against the first sealing surface 6. Next, an underpressure is presented to the second fluid connection 28. The second valve 30 is opened or maintained in its open position if already open. Due to the underpressure the pressure at the side of the lid 8 facing the suction device 14 will be lower than the pressure at the side of the lid 8 facing the inner space 40 of the package 36. Therefore, the lid 8 will be lifted off the first sealing surface 6 against the biasing force of the biasing element 10, into the first position, see Figure 3b. It will be appreciated that the second fluid connection 28 and/or the second valve 30 acts as an actuator for moving the lid from the second position to the first position.
With the lid in the first position, an underpressure is presented to the first fluid connection 16. The first valve 18 is opened or maintained in its open position if already open. Since in this state the first fluid connection 16 is in fluid communication with the opening 4, the inner space 40 of the package 36 can be degasssed. It will be appreciated that lifting the lid 8 off the first sealing surface 6 provides a ring-shaped gap between the lid and the first sealing surface 6. A surface area of this gap is determined by a radius of the opening 4 and a height the lid 8 is lifted off the sealing surface 6. It will be appreciated that the surface area can be chosen relatively large so as to allow a large throughput of gas. This allows for fast degassing of the inner space 40.
If desired, the inner space can be filled with a gas, such as an inert gas via the first fluid connection. Hence, the opening 4 allows gas to leave or enter the inner space 40. After degassing and optional regassing of the inner space 40, the underpressure at the second fluid connection 28 is released. As a result the fid 8 will be returned to the second position and the package is hermetically sealed. It will be appreciated that at this stage the suction device 14 may be removed from the package part 1.
The packaging system 34 as shown in Figures 3a and 3b can also be used in a further mode of operation. Once the package 36 is degassed or regassed, it may be desirable to measure a pressure inside the package and/or to sample a gas composition inside the package. Thereto the suction device 14 may be abutted against the package as shown in Figure 3a. The second fluid connection may again be used to position the fid in the first position. Effectively, the package 36 is then re-opened. It is then possible to measure the pressure inside the package by measuring the pressure at the opened opening 4. Preferebly, the first valve 18 is closed during this operation to avoid re-gassing of the package. It is also possible to take a sample of the gas inside the package via the first fluid connection. After taking of the gas sample the fid can be brought into the second position again to close the package. The gas sample can be analyzed. For instance the composition of the gas sample can be determined. For instance an oxygen content and/or an oxygen partial pressure van be determined.
Figure 4a shows another embodiment of a package part 1 attached to a package 36. In this example the lid 8 is provided with a valve 48. In this example the valve 48 is a one-way valve allowing gas to be drawn through the valve in the direction out of the package, and preventing gas to enter the package through the valve 48.
Figure 4b shows an embodiment of a packaging system 34. The packaging system 34 includes the package part 1 of Figure 4a with a suction device 14 abutted against it. The operation of the packaging system is similar as explained in relation to Figures 3a and 3b. It will be appreciated that providing an underpressure to the second fluid connection 28 would result in drawing gas out of the package 36 via the valve 48. This might prevent proper lifting of the lid 8 off the first sealing surface 6. To avoid this, in this example the suction device 14 is provided with a preventer 50. The preventer 50 prevents the valve 48 from opening while the suction device 14 abuts against the package part 1. For instance, if the valve 48 includes a membrane valve, the preventer 50 can be a finger preventing the membrane from being lifted from its seat. For instance, if the valve 48 includes a ball valve, the preventer 50 can be a finger preventing the ball from being lifted from its seat. In this example the preventer 50 is resilient, e.g. a spring, to allow to prevent the valve 48 from opening both in the first and in the second position.
Figure 4c shows the package part 1 and package 36 of Figure 4a. In Figure 4c a measurement head 52 is sealingly abutted against the package part 1. The measurement head is in fluid communication with the second aperture 46 of the package part 1. In this example, the measurement head 52 is not in fluid communication with the first aperture(s) 44. The measurement head 52 can be brought in fluid communication with an oxygen sensor 54 for determining an oxygen content of the gas in the inner space 40. Thereto the oxygen sensor can draw a small quantity of gas out of the inner space 40 via the valve 48. Alternatively, or additionally, the measurement head 52 can be brought in fluid communication with a pressure determining unit 56. In this example the pressure determining unit 56 includes a pump and a pressure sensor. Preferably the pump has a low throughput capacity. The pump reduces the pressure in the small volume of the measurement head 52. Once the pressure inside the measurement head 52 reaches the pressure inside the inner space, the valve 48 will open. From that moment, t0, onwards the pump attempts to lower the pressure in the large combined volume of the measurement head and the inner space. As this volume is much larger than the volume of the measurement head (typically more than 1000 times larger, such as more than 10,000 times larger) the pressure measured by the pressure sensor from that moment onwards decreases at a much lower rate. In many applications no further pressure decrease may be noticeable from that moment onwards. Figure 4d is a schematic representation of a diagram representing the measured pressure as a function of time. The pressure level measured at the moment t0 represents the pressure inside the inner space.
Figure 5a shows a schematic explode view of another embodiment of a packaging system 34. The packaging system 34 includes a package part 1. The package part 1 includes a substantially rigid element 2. The element has an opening 4. The element 2 further has a first sealing surface 6 surrounding the opening 4. The packaging system 34 further includes a lid 8. The fid 8 also has a sealing surface 20 for sealing against the first sealing surface 6 of the element 2. In this example the lid 4 further includes a valve 48. In this example the valve 48 is a one-way valve allowing gas to be drawn through the valve in the direction out of the package, and preventing gas to enter the package through the valve 48.
The packaging system 34 further includes a suction device 14. The suction device 14 includes a first fluid connection 16 for connection to a degassing or gassing device such as a vacuum pump or a source gas, such as inert gas. In this example, the first fluid connection 16 includes a valve 18 for selectively opening and closing the first fluid connection. In this example, the suction device 14 includes a third sealing surface 22 and a fourth sealing surface 24. Here the third sealing surface 22 is a circumferential sealing surface, such as an O-ring. Here the fourth sealing surface 24 is a circumferential sealing surface, such as an O-ring. Here the third sealing surface 22 circumscribes the fourth sealing surface 24. In this example the fourth sealing surface 24 is substantially concentric with the third sealing surface 22. In this example the first fluid connection 16 is in fluid communication with a first area 26 between the third and fourth sealing surfaces 22, 24. In this example, the suction device 14 includes a second fluid connection 28 for connection to a degassing or gassing device such as a vacuum pump or a source gas, such as inert gas. In this example, the second fluid connection 28 includes a valve 30 for selectively opening and closing the second fluid connection. In this example the second fluid connection 28 is in fluid communication with a second area 32 circumscribed by the fourth sealing surface 24. In this example, the suction device also includes a preventer 50 for preventing the valve 48 from opening while the suction device 14 abuts against the package part 1.
In Figure 5a the suction device 14 further includes a fifth sealing surface 58. Here the fifth sealing surface 58 is a circumferential sealing surface, such as an O-ring. Here the fifth sealing surface 58 circumscribes the third sealing surface 22. In this example the fifth sealing surface 58 is substantially concentric with the third sealing surface 22. In Figure 5a the suction device 14 further includes a third fluid connection 60 for connection to a pump. In this example, the third fluid connection 60 includes a valve 62 for selectively opening and closing the third fluid connection 60. In this example the third fluid connection 60 is in fluid communication with a third area 64 between the third and fifth sealing surfaces 22, 58.
The packaging system 34 as described with respect to Figure 5a can be operated as follows. The lid 8 is positioned against the fourth sealing surface 24. Next, an underpressure is presented to the second fluid connection 28. The second valve 30 is opened or maintained in its open position if already open. Due to the underpressure the lid 8 will be sucked against the fourth sealing surface 24. In this example, the O/ring forming the fourth sealing surface 24 will be compressed due to the underpressure.
The suction device is abutted against the package part 1, see Figure 5b. In this example, an underpressure is presented to the third fluid connection 60. The third valve 62 is opened or maintained in its open position if already open. Due to the underpressure the suction device 14 will be sucked against the package part 1. Hence, the suction device 14 remains positioned against the package part 1. As can be seen in Figure 5b, while the underpressure is present at the second fluid connection 28, the lid remains offset relative to the first sealing surface 6 of the package part 1. It will be appreciated that the O-ring 24 is compressed and thereby also functions as biasing element 10, lid 8 being lifted off the first sealing surface 6 against the biasing force of the biasing element 10, into the first position.
With the lid in the first position, an underpressure is presented to the first fluid connection 16. The first valve 18 is opened or maintained in its open position if already open. Since in this state the first fluid connection 16 is in fluid communication with the opening 4, the inner space 40 of the package 36 can be degasssed. If desired, the inner space can be filled with a gas, such as an inert gas via the first fluid connection.
After degassing and optional regassing of the inner space 40, the underpressure at the second fluid connection 28 is released. As a result the hd 8 will be brought into the second position abutting against the first sealing surface 6, due to the biasing force of the biasing element 10, see
Figure 5c. In this example, the sealing surface 20 of the lid 8 includes an adhesive. Therefore, when the lid is brought into the second position the lid adheres to the element 2. The package is then hermetically sealed. It will be appreciated that at this stage the suction device 14 may be removed from the package part 1.
If desired a composition of a gas in the package and/or a pressure inside the package may be determined may be determined using a measurement head 52 as describe in relation to Figure 4c.
Figure 6 shows a schematic cross sectional view of another embodiment of a packaging system 34. The packaging system 34 includes a package part 1. The package part 1 includes a substantially rigid element 2. The element has an opening 4. The element 2 further has a first sealing surface 6 surrounding the opening 4. The packaging system 34 further includes a lid 8. The lid 8 also has a sealing surface 20 for sealing against the first sealing surface 6 of the element 2. The fid 8 is biased in abutment against the first sealing surface 6 by a biasing element 10. In this example, the biasing element is a resilient membrane 10B. The resilient membrane 10B is held in place by a retainer 12B.
The packaging system 34 further includes a suction device 14. The suction device 14 includes a first fluid connection 16 for connection to a degassing or gassing device such as a vacuum pump or a source gas, such as inert gas. In this example, the first fluid connection 16 includes a valve 18 for selectively opening and closing the first fluid connection. In this example, the suction device 14 includes a third sealing surface 22 and a fourth sealing surface 24. Here the third sealing surface 22 is a circumferential sealing surface, such as an O-ring. Here the fourth sealing surface 24 is a circumferential sealing surface, such as an O-ring. Here the third sealing surface 22 circumscribes the fourth sealing surface 24. In this example the fourth sealing surface 24 is substantially concentric with the third sealing surface 22. In this example the first fluid connection 16 is in fluid communication with a first area 26 between the third and fourth sealing surfaces 22, 24. In this example, the suction device 14 includes a second fluid connection 28 for connection to a degassing or gassing device such as a vacuum pump or a source gas, such as inert gas. In this example, the second fluid connection 28 includes a valve 30 for selectively opening and closing the second fluid connection. In this example the second fluid connection 28 is in fluid communication with a second area 32 circumscribed by the fourth sealing surface 24.
The packaging system 34 as described with reference to Figure 6 can be operated as follows. A package 36 is provided. The package 36 is provided with the package part 1. The package 36 can be filled with a product, such as nuts, coffee, milk powder or the like. Thereto the package 36 may include a filling opening that is hermetically sealed after filling of the package 36. The lid 8 is in the second position, biased in abutment against the first sealing surface 6 by the biasing element 10 so that the fid hermetically seals against the first sealing surface 6. Next, an underpressure is presented to the second fluid connection 28. The second valve 30 is opened or maintained in its open position if already open. Due to the underpressure the pressure at the side of the fid 8 facing the suction device 14 will be lower than the pressure at the side of the fid 8 facing the inner space 40 of the package 36. Therefore, the fid 8 will be lifted off the first sealing surface 6 against the biasing force of the biasing element 10. Here the membrane may be elastically stretched to allow the fid 8 to lift off the first sealing surface 6, into the first position. It will be appreciated that the second fluid connection 28 and/or the second valve 30 acts as an actuator for moving the fid from the second position to the first position.
With the fid in the first position, an underpressure is presented to the first fluid connection 16. The first valve 18 is opened or maintained in its open position if already open. Since in this state the first fluid connection 16 is in fluid communication with the opening 4, the inner space 40 of the package 36 can be degasssed. It will be appreciated that lifting the lid 8 off the first sealing surface 6 provides a ring-shaped gap between the fid and the first sealing surface 6. A surface area of this gap is determined by a radius of the opening 4 and a height the fid 8 is lifted off the sealing surface 6. It will be appreciated that the surface area can be chosen relatively large so as to allow a large throughput of gas. This allows for fast degassing of the inner space 40.
If desired, the inner space can be filled with a gas, such as an inert gas via the first fluid connection. Hence, the opening 4 allows gas to leave or enter the inner space 40. After degassing and optional regassing of the inner space 40, the underpressure at the second fluid connection 28 is released. As a result the lid 8 will be returned to the second position and the package is hermetically sealed. It will be appreciated that at this stage the suction device 14 may be removed from the package part 1.
If desired a composition of a gas in the package and/or a pressure inside the package may be determined may be determined using a measurement head 52 as describe in relation to Figure 4c.
Figure 7 shows a schematic cross sectional view of another embodiment of a packaging system 34. The package part 1 is substantially identical to the package part described in relation to Figures la-lc.
In this example, the suction device includes inner suction device 14A and an outer suction device 14B. The inner suction device 14A includes a first fluid connection 16 for connection to a degassing or gassing device such as a vacuum pump or a source gas, such as inert gas. In this example, the first fluid connection 16 includes a valve 18 for selectively opening and closing the first fluid connection. In this example, the inner suction device 14A includes a third sealing surface 22. The outer suction device 14B encloses the inner suction device 14A. In this example, the first fluid connection 16 includes a flexible section 16A. In this example, the inner suction device 14A is movably positioned within the outer suction device.
The outer suction device 14B includes a fourth sealing surface 24. In this example, the outer suction device 14B includes a second fluid connection 28 for connection to a degassing or gassing device such as a vacuum pump or a source gas, such as inert gas. In this example, the second fluid connection 28 includes a valve 30 for selectively opening and closing the second fluid connection.
In this example the inner suction device 14A abuts against the package part 1, or against the package 36 overlying the package part 1. The outer suction device 14B abuts against the package 36 in an area that is not supported by the package part 1. This arrangement proves to be advantageous for packages containing powdered contents. The outer suction device 14B abutting against the package 36 in an area that is free from support by the package part 1 provides the advantage that the powder is not, or at least less, compacted underneath the package part upon evacuating the package 36 through the opening 4 in the package part. Hence, evacuation speed can be increased. Although Fig. 7 shows the package part as described in relation to Figures la-lc, it will be appreciated that, similarly, the suction device including the inner suction device and the outer suction device can be used to advantage in conjunction with the package parts as described in relation to the other figures. It will also be appreciated that the suction device including the inner suction device and the outer suction device can be used to advantage with other package parts, e.g. substantially rigid discs, not necessarily including an actuatable valve.
Herein, the invention is described with reference to specific examples of embodiments of the invention. It will, however, be evident that various modifications and changes may be made therein, without departing from the essence of the invention. For the purpose of clarity and a concise description features are described herein as part of the same or separate embodiments, however, alternative embodiments having combinations of all or some of the features described in these separate embodiments are also envisaged.
In the examples the suction device sealingly abuts against a sealing surface of the package part. It will be appreciated that it is also possible that the packaging film overlaps the package part to such extent that at the suction device seahngly abuts against the packaging film. In the example of Figures 5a, 5b and 5c the aperture 42 in the packaging film may coincide with the opening 4 in the packaging part 1. The aperture 42 may e.g. have substantially the same size as the opening 4.
The O-rings may have different, shore hardnesses. For instance, the O-ring used for the biasing element may have a lower shore hardness than the remaining O-rings. Optionally, a thickness or the O-ring used for the biasing element is larger than a thickness of the remaining O-rings so as to allow ample travel of the lid.
It will be appreciated that the circumferential sealing contour can have any desired shape. The circumferential sealing contour can for instance be circular, elliptic, oval, square, rectangular, triangular, polygonal, irregular, etc.
In the examples the biasing element is an O-ring. Other biasing elements are possible however. The biasing element may e.g. include a bellows. The biasing element may also include a spring.
In the examples the package part 1 is attached to an inner side of the packaging film. It is also possible that the package part is attached to an outer side of the packaging film.
In the examples of 4a-5c the valve 48 is included in the fid 8. It will be appreciated that it is also possible that the valve 48 is located elsewhere in the packaging system, e.g. in the package 36 and/or the packaging film 38. If the valve 48 is positioned remote from the lid, measuring a pressure inside the package via the valve, during evacuation via the opening of the substantially rigid element, can be more accurate.
This can be of benefit when a measured pressured inside the package is used for controlling the evacuating of the package.
In the example of Figure 5a, 5b and 5c the third fluid connection is used for maintaining the suction device positioned against the package part. It will be appreciated that such third fluid connection can also be used in conjunction with the other embodiments.
However, other modifications, variations, and alternatives are also possible. The specifications, drawings and examples are, accordingly, to be regarded in an illustrative sense rather than in a restrictive sense.
For the purpose of clarity and a concise description features are described herein as part of the same or separate embodiments, however, it will be appreciated that the scope of the invention may include embodiments having combinations of all or some of the features described.
In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word ‘comprising’ does not exclude the presence of other features or steps than those listed in a claim. Furthermore, the words ‘a’ and ‘an’ shall not be construed as limited to ‘only one’, but instead are used to mean ‘at least one’, and do not exclude a plurality. The mere fact that certain measures are recited in mutually different claims does not indicate that a combination of these measures cannot be used to an advantage.

Claims (20)

1. Werkwijze voor het ontgassen van een verpakking omvattende een verpakkingsfolie die een product houdende binnenruimte omsluit, en Een in hoofdzaak rigide element dat verbonden is met de verpakkingsfolie langs een afdichtingsomtrekcontour, waarbij het element een opening heeft binnen de contour voor het toelaten dat gas de binnenruimte in- of uitstroomt van en een afsluitingsoppervlak rondom de opening, waarbij de werkwijze omvat: - het afdichtend aanleggen van een zuiginrichting tegen een buitenzijde van de verpakking op een locatie van het in hoofdzaak rigide element; - het verschaffen van een deksel ingericht voor het afdichtend aanliggen tegen het afsluitingsoppervlak voor het sluiten van de opening, en een actuator voor het selectief bewegen van het deksel van een eerste positie naar een tweede positie, waarbij in de eerste positie het deksel op afstand staat ten opzichte van het afsluitingsoppervlak zodanig dat is toegelaten dat gas de binnenruimte in of uit gaan, en waarbij in de tweede positie het deksel afdichtend tegen het afsluitingsoppervlak aanligt voor het afsluiten van de opening; - het met het deksel in de eerste positie bedrijven van de zuiginrichting voor het ontgassen van de binnenruimte; en - het sluiten van de opening door het bedienen van de aandrijving om deze in de tweede positie te brengen.A method for degassing a package comprising a packaging foil enclosing a product-containing interior space, and A substantially rigid element connected to the packaging foil along a sealing contour contour, the element having an opening within the contour for allowing gas to inner space flows in or out of and a sealing surface around the opening, the method comprising: - sealingly applying a suction device against an outside of the package at a location of the substantially rigid element; - providing a lid adapted for sealingly abutting the closing surface for closing the opening, and an actuator for selectively moving the lid from a first position to a second position, the lid being spaced apart in the first position with respect to the sealing surface such that gas is allowed into or out of the inner space, and wherein in the second position the lid is sealingly against the sealing surface for closing the opening; operating the suction device with the lid in the first position for degassing the inner space; and closing the opening by operating the drive to bring it into the second position. 2. Werkwijze volgens conclusie 1, die voorts het vullen van de verpakking met een inert gas omvat.The method of claim 1, further comprising filling the package with an inert gas. 3. Werkwijze volgens conclusie 1 of 2, die voorts, na sluiten van de opening, het heropenen van de opening omvat voor het meten van een druk en/of gas inhoud van de binnenruimte.Method according to claim 1 or 2, further comprising, after closing the opening, reopening the opening for measuring a pressure and / or gas content of the inner space. 4. Werkwijze volgens conclusie 1,2 of 3, waarbij de actuator bediend wordt door gasdruk.Method according to claim 1,2 or 3, wherein the actuator is operated by gas pressure. 5. Verpakkingssysteem omvattende een verpakking voorzien van: een verpakking omvattende een verpakkingsfolie die een binnenruimte voor het houden van een product omsluit en een zuiginrichting voor het verwijderen van gas uit de binnenruimte; waarbij het verpakkingssysteem voorts voorzien is van: een in hoofdzaak rigide element verbonden met de verpakkingsfolie langs een afdichtingsomtrekcontour, waarbij het element een opening heeft binnen de contour voor het toelaten dat gas de binnenruimte in- of uitstroom, waarbij het element verder een afsluitingsoppervlak heeft rondom de opening; en een deksel ingericht voor het afdichtend aanliggen tegen het afsluitingsoppervlak voor het afsluiten van de opening; waarbij het systeem omvat: een actuator voor het selectief bewegen van het deksel van een eerste naar een tweede positie, waarbij in de eerste positie het deksel op afstand gepositioneerd is ten opzichte van het afsluitingsoppervlak zodanig dat toegelaten is dat gas de binnenruimte in of uit gaat, en waarbij in de tweede positie het deksel afdichtend tegen het afsluitingsoppervlak aanligt voor het afsluiten van de opening.A packaging system comprising a package comprising: a package comprising a packaging foil enclosing an inner space for holding a product and a suction device for removing gas from the inner space; wherein the packaging system further comprises: a substantially rigid element connected to the packaging foil along a sealing contour contour, the element having an opening within the contour for allowing gas to flow in or out of the inner space, the element further having a sealing surface around the opening; and a lid adapted for sealingly abutting the sealing surface for closing the opening; wherein the system comprises: an actuator for selectively moving the lid from a first to a second position, wherein in the first position the lid is positioned remotely with respect to the sealing surface such that gas is allowed in or out of the interior space and wherein in the second position the lid abuts against the sealing surface for closing the opening. 6. Systeem volgens conclusie 5, waarbij de actuator deel van de verpakking is.The system of claim 5, wherein the actuator is part of the package. 7. Systeem volgens conclusie 5, waarbij de actuator deel van de zuiginrichting is.The system of claim 5, wherein the actuator is part of the suction device. 8. Systeem volgens een der conclusies 5-7, waarbij de actuator een voorspan element omvat voor het voorspannen van het deksel naar de tweede positie.8. System as claimed in any of the claims 5-7, wherein the actuator comprises a prestressing element for prestressing the cover to the second position. 9. Systeem volgens conclusie 8, waarbij de actuator is ingericht voor het naar een opening trekken van het deksel naar de eerste positie door middel van onderdruk.A system according to claim 8, wherein the actuator is adapted to pull the lid to an opening to the first position by means of underpressure. 10. Systeem volgens conclusie 9, waarbij de zuiginrichting een eerste verbinding heeft voor het in fluïdumverbinding staan met de opening voor het ontgassen van de binnenruimte en een tweede verbinding voor het in fluïdumverbinding staan met de actuator.The system of claim 9, wherein the suction device has a first connection for being in fluid communication with the opening for degassing the interior space and a second connection for being in fluid communication with the actuator. 11. Systeem volgens een der conclusies 5-10, waarbij de verpakking voorts een klep omvat voor het tot monstername instaat stellen van een gasachtige inhoud van de verpakking na het sluiten van de opening11. System as claimed in any of the claims 5-10, wherein the package further comprises a valve for sampling a gaseous content of the package after closing of the opening 12. Systeem volgens conclusie 11, waarbij de klep deel uitmaakt van het deksel.The system of claim 11, wherein the valve forms part of the lid. 13. Systeem volgens conclusie 12, waarbij de zuiginrichting een klep-deactivator omvat voor het deactiveren van de klep in de eerste positie.The system of claim 12, wherein the suction device comprises a valve deactivator for deactivating the valve in the first position. 14. Systeem volgens een der conclusies 4-13, waarbij de zuiginrichting een binnen-zuiginrichting en een buiten-zuiginrichting omvat, waarbij de binnen-zuiginrichting draagt tegen het in hoofdzaak rigide element, waarbij de buiten-zuiginrichting niet tegen het in hoofdzaak rigide element draagt.A system according to any one of claims 4-13, wherein the suction device comprises an inner suction device and an outer suction device, wherein the inner suction device bears against the substantially rigid element, the outer suction device not being against the substantially rigid element wear. 15. Verpakking voorzien van: een verpakkingsfolie die een binnenruimte voor het houden van een product omsluit; een in hoofdzaak rigide element verbonden met de verpakkingsfolie langs een afdichtingsomtrekcontour, waarbij het element een opening heeft binnen de contour voor het toelaten dat gas de binnenruimte in- of uitstroom, waarbij het element verder een afsluitingsoppervlak heeft rondom de opening; en een deksel ingericht voor het afdichtend aanliggen tegen het afsluitingsoppervlak voor het afsluiten van de opening.15. Packaging comprising: a packaging foil enclosing an inner space for holding a product; a substantially rigid element connected to the packaging foil along a sealing contour contour, the element having an opening within the contour for allowing gas to flow in or out of the inner space, the element further having a sealing surface around the opening; and a lid adapted for sealingly abutting against the closure surface for closing the opening. 16. Verpakking volgens conclusie 15, voorts voorzien van: een actuator voor het selectief bewegen van het deksel van een eerste positie naar een tweede positie, waarbij in de eerste positie het deksel op afstand gepositioneerd is ten opzichte van het afsluitingsoppervlak zodanig is toegelaten dat gas de binnenruimte in of uit gaat, en waarbij in de tweede positie het deksel afdichtend tegen het afsluitingsoppervlak aanligt voor het afsluiten van de opening.A package according to claim 15, further comprising: an actuator for selectively moving the lid from a first position to a second position, wherein in the first position the lid is positioned remotely with respect to the sealing surface such that gas is allowed the interior space enters or exits, and wherein in the second position the lid abuts against the sealing surface for closing the opening. 17. Verpakking volgens conclusie 15 of 16, waarbij de verpakking voorts een klep omvat voor het tot monstername instaat stellen van een gasachtige inhoud van de verpakking na het sluiten van de opening.A package according to claim 15 or 16, wherein the package further comprises a valve for sampling a gaseous content of the package after the opening of the opening has been closed. 18. Een set van onderdelen omvattende: een in hoofdzaak rigide element ingericht om verbonden te worden aan een verpakkmgsfolie langs een afdichtingsomtrekcontour, waarbij het element een opening heeft binnen de contour voor toelaten dat gas daar doorheen stroomt, waarbij het element verder een afsluitingsoppervlak rondom de opening heeft; en een deksel ingericht voor het afdichtend aanliggen tegen het afsluitingsoppervlak voor het afsluiten van de opening.A set of parts comprising: a substantially rigid element adapted to be connected to a packaging film along a sealing contour contour, the element having an opening within the contour for allowing gas to flow therethrough, the element further comprising a sealing surface around the opening has; and a lid adapted for sealingly abutting against the closure surface for closing the opening. 19. Een set volgens conclusie 18, voorts omvattende: een actuator voor het selectief bewegen van het deksel van een eerste positie naar een tweede positie, waarbij in de eerste positie het deksel op afstand gepositioneerd is ten opzichte van het afsluitingsoppervlak zodanig dat toegelaten is dat gas door de opening stroomt, en waarbij in de tweede positie het deksel afdichtend tegen het afsluitingsoppervlak aanligt voor het afsluiten van de opening.A set according to claim 18, further comprising: an actuator for selectively moving the cover from a first position to a second position, wherein in the first position the cover is positioned remotely with respect to the sealing surface such that it is permitted that gas flows through the opening, and wherein in the second position the lid abuts against the sealing surface for closing the opening. 20. Een set volgens conclusie 18 of 19, waarbij het deksel een klep omvat voor het instaat stellen tot monstername van een gasachtige inhoud over het deksel.A set according to claim 18 or 19, wherein the lid comprises a valve for allowing sampling of a gaseous content over the lid.
NL2014363A 2015-02-27 2015-02-27 System for degassing a package. NL2014363B1 (en)

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WO2018017534A1 (en) * 2016-07-18 2018-01-25 Massachusetts Institute Of Technology Self-sealing container for protecting air sensitive samples

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