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NL2035990B1 - A method and apparatus for measuring oxygen content - Google Patents

A method and apparatus for measuring oxygen content Download PDF

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Publication number
NL2035990B1
NL2035990B1 NL2035990A NL2035990A NL2035990B1 NL 2035990 B1 NL2035990 B1 NL 2035990B1 NL 2035990 A NL2035990 A NL 2035990A NL 2035990 A NL2035990 A NL 2035990A NL 2035990 B1 NL2035990 B1 NL 2035990B1
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NL
Netherlands
Prior art keywords
package
gas
circumferential
space
oxygen content
Prior art date
Application number
NL2035990A
Other languages
Dutch (nl)
Inventor
Tonnis Smit Arjan
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 NL2035990A priority Critical patent/NL2035990B1/en
Priority to PCT/NL2024/050552 priority patent/WO2025080130A1/en
Application granted granted Critical
Publication of NL2035990B1 publication Critical patent/NL2035990B1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
    • G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
    • 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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
    • G01M3/3218—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators for flexible or elastic containers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
    • G01M3/3281—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators removably mounted in a test cell

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Pathology (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Molecular Biology (AREA)
  • Biomedical Technology (AREA)
  • Combustion & Propulsion (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

Title: An method and apparatus for measuring oxygen content Abstract A method and apparatus for measuring oxygen content in a package containing a gas. The method comprises providing a suction head. The method comprises engaging the package with the suction head having a first circumferential ridge and a second circumferential ridge surrounding the first circumferential ridge, wherein a circumferential space is formed by the space between the first circumferential ridge and the second circumferential ridge, and wherein a central space is formed by the space radially inward with respect to the first circumferential ridge. The method comprises reducing a gas pressure in the circumferential space to a first pressure such that an airtight seal is formed between the circumferential ridges and the package. The method comprises measuring oxygen content of the gas inside the package through an opening in the package positioned, in use, in fluid communication with the central space.

Description

P135166NL00
Title: A method and apparatus for measuring oxygen content
FIELD OF THE INVENTION
The present invention relates to the field of measuring oxygen content. In particular, the invention relates to the field of measuring oxygen content in a package. More in particular, the invention relates to a method for measuring oxygen content in a package containing a gas, and an apparatus for measuring oxygen content in a package containing a gas.
BACKGROUND
In the food and beverage industry, shelf life is ensured by limiting the oxygen content of food and/or beverage packages containing a gas. After production and prior to distribution of the packages, a quality control check can be performed to ensure compliance with food and commodity regulations and/or guidelines. During quality control, the oxygen content in the package can be measured as a standard procedure.
It 1s known to measure oxygen content in packages by inserting a needle therein and removing some of the gas from the package for measuring oxygen content. Inserting a needle is part of a destructive test opening the package thereby rendering the package unfit for sale. Further, the measurement including inserting the needle assumes a tight seal between the package and the needle. Any leaks between the package and the needle may result in ambient air leaking into the package. Upon mixing of ambient air with the oxygen containing gas inside the package, oxygen measurement results are affected. This leads to false oxygen content measurement results and potentially erroneous quality control conclusions leading to approval of effective non-compliant packages and disapproval of effective compliant packages. False measurement results can therefore be a cause of food and beverage product waste and the shelf life of food and beverage products can be reduced.
SUMMARY
It is an object to provide a method for measuring oxygen content in a package containing a gas and an apparatus for measuring oxygen content in a package containing a gas. More in general, it 1s an object to provide an improved method for measuring oxygen content, and/or an apparatus for measuring oxygen content.
Thereto, according to a first aspect is provided a method for measuring oxygen content in a package containing a gas. The package can contain a solid and/or liquid substance and a gas. A pressure in the film package can be atmospheric or subatmospheric. The film package can e.g. have been sealed at a subatmospheric pressure. The package can be rigid or at least partially resilient, e.g. flexible. The method comprises providing a suction head. The suction head can e.g. comprise a cylindrical shape, a conical shape, the shape of a rectangular box or cube. However, other shapes may be contemplated. The method comprises engaging the package with the suction head. The suction head can be smaller than the package. A width and/or diameter of the suction head can be smaller than a length and/or width of the package, such that the package is engaged by an entire surface of the suction head. The suction head has a first circumferential ridge and a second circumferential ridge. The second circumferential ridge is positioned on the suction head surrounding the first circumferential ridge. The second circumferential ridge can be arranged radially outward with respect to the first circumferential ridge.
A circumferential space is formed by the space between the first carcumferential ridge and the second circumferential ridge. A central space is formed by the space radially inward with respect to the first circumferential ridge. The circumferential space and the central space are each positioned between the suction head and the package when the package is engaged with the suction head. When the suction head is in the engaged position with respect to the package, the suction head touches the package with its circumferential ridges. The method comprises reducing a gas pressure in the circumferential space to a first pressure such that an airtight seal is formed between the circumferential ridges and the package.
The pressure can be reduced by suction means. The suction means can reduce the pressure via a first suction port and a first duct. The first suction port can be positioned in the circumferential space. Optionally, multiple first suction ports are positioned in the circumferential space. The first pressure can be lower than atmospheric pressure, e.g. lower than 1 bara.
The method comprises measuring oxygen content of the gas inside the package through an opening in the package positioned, in the engaged position, in fluid communication with the central space. The oxygen content of the gas inside the package can be measured at or near the opening of the package. The oxygen content of the gas inside the package can be measured away from the opening of the package, by moving the gas through the opening to a measurement position. The measurement position can be at or near the suction head and/or in the central space. Alternatively, the measurement position can be away from the suction head, e.g. in a measurement location in fluid communication with the suction head. In the engaged position, the suction head can be positioned with respect to the package such that the opening in the package 1s arranged radially inward with respect to the first circumferential ridge. Prior to measuring oxygen content of the gas inside the package, the opening can be closed. During measuring oxygen content of the gas inside the package, the opening can be at least partially open. The package can be opened after reducing the gas pressure in the circumferential space and prior to measurement of the oxygen content. Opening the package can create the opening for oxygen measurement. The opening can be at least partially positioned in the surface of the package.
Optionally, measuring oxygen content of the gas inside the package comprises feeding gas drawn out of the package through the opening in the package to an oxygen measurement unit. The oxygen measurement unit can comprise an oxygen detector. The gas can be drawn out of the package through the opening in the package by suction means.
The gas can be fed to the oxygen measurement unit by suction means. The suction means can comprise a pump.
Optionally, the first and second circumferential ridges are positioned in the same plane on the suction head. The first and second circumferential ridge can be concentric. The first and second circumferential ridges each extend at least partially outwardly from the suction head.
Optionally, the first circumferential ridge comprises a flexible ring. The first circumferential ridge can be flexible, such as elastic. The first circumferential ridge can e.g. comprise a rubber surface.
Optionally, the second circumferential ridge is arranged at or near the perimeter of the suction head. Optionally, the second crcumferential ridge comprises a flexible ring. The second circumferential ridge can be flexible, such as elastic. The second circumferential ridge can e.g. comprise a rubber surface. The second circumferential ridge can extend at least partially in a direction perpendicular to an engagement surface of the suction head. The second circumferential ridge can comprise a slanted edge. The slanted edge can be sloped and/or angled such that the second circumferential ridge extends at least partially in a direction extending outward with respect to the perimeter of the suction head.
Optionally, the second circumferential ridge comprises a self- reinforcing seal. A pressure or force exerted onto the self-reinforcing seal by reducing the pressure in the circumferential space can aid to press the self- reinforcing seal against the package. The higher the pressure or force exerted onto the self-reinforcing seal by the pressure reduction in the circumferential space, the higher the pressure or force by which the self- reinforcing seal seals against the package.
Optionally, the package comprises a valve positioned adjacent the central space upon engaging the package with the suction head, wherem the valve in a closed state prevents gas from escaping, and wherein the valve is biased to the closed state. The valve can be positioned, in the engaged 5 position, radially inward with respect to the first circumferential ridge.
Thus, gas can be drawn out of the package to an oxygen measurement unit through the opening in the valve of the package. Hence, non-destructive oxygen measurement is possible.
Optionally, the method further comprises opening the valve by reducing a gas pressure of the gas in the central space. Upon opening the valve, the opening can be formed for measuring oxygen content of the gas inside the package therethrough. The opening in the package formed by opening the valve is positioned in fluid communication with the central space.
Optionally, the method further comprises testing the functioning of the valve of the package. The functioning of the valve can be tested by increasing and/or decreasing the pressure in the central space. During testing of the functioning of the valve, opening and/or closing of the valve upon a change in pressure can be detected. It is e.g. possible to test a pressure, or pressure difference, at which the valve opens.
Optionally, the method further comprises obtaining gas from inside the package for measuring oxygen content. The gas can be moved from the inside of the package and out of the package through the opening to the central space. A predetermined amount of gas can be obtained from inside the package.
Optionally, the method further comprises feeding gas from inside the package to the oxygen measurement unit until the measured oxygen content is constant over time. The oxygen measurement unit can be configured to measure the oxygen content continuously or at time intervals.
The oxygen measurement unit can be configured to measure the oxygen content during the entire time of feeding gas from inside the package to the oxygen measurement unit until the measured oxygen content is constant over time. The measured oxygen content can be constant over time if the deviations in measured oxygen content over time are within a predefined range. For instance, the measured oxygen content can be considered constant if the change in measured oxygen content is less than a predetermined percentage per minute, such as less than 0.1% per minute.
The gas can be fed to the oxygen measurement unit until the deviations in measured oxygen content are within a predetermined range over a predetermined time window.
Optionally, the method further comprises inserting a needle into the package adjacent the central space for measuring oxygen content. The needle can be inserted on the package surface area that is positioned, in the engaged position, radially inward with respect to the first circumferential ridge. The needle can create the opening in the package for measuring oxygen content therethrough.
Optionally, the method further comprises determining the leak tightness of the package based on the force and/or pressure of the gas in the central space. Determining the leak tightness can comprise reducing the gas pressure in the central space to a second pressure such that the package abuts against a part of a central space wall of the suction head that is positioned radially inward with respect to the first circumferential ridge.
The pressure difference between the package and the central space can cause a volume of gas in the package to increase, such that the package expands. The volume increase of the package and/or the higher pressure inside the package than around the package in the central space can generate a force and/or pressure acting on a part of the central space wall of the suction head that is positioned radially inward with respect to the first circumferential ridge.
According to a second aspect is provided an apparatus for measuring oxygen content in a package containing a gas. The apparatus comprises a suction head arranged for engaging a package. The suction head comprises a first circumferential ridge and a second circumferential ridge surrounding the first circumferential ridge. A circumferential space is formed by the space between the first circumferential ridge and the second circumferential ridge. A central space is formed by the space radially inward with respect to the first circumferential ridge. The apparatus comprises an oxygen detector. The apparatus is configured for, after engaging the package with the first and second circumferential ridges, reducing a gas pressure in the circumferential space to a first pressure such that an airtight seal is formed between the circumferential ridges and the package. Hence, the central space is shielded from ambient air by the airtight seals formed at the first and/or second circumferential ridges. The apparatus is configured for measuring oxygen content of the gas inside the package by feeding gas drawn out of the package, through an opening in the package positioned, in use, in fluid communication with the central space, to the oxygen detector.
The oxygen detector can measure oxygen content of the gas e.g. electrochemically or optically, such as based on luminescence.
Optionally, the first and second circumferential ridges are positioned in the same plane on the suction head.
Optionally, the second circumferential ridge is arranged at or near the perimeter of the suction head.
Optionally, the first circumferential ridge comprises a flexible ring.
Optionally, the second circumferential ridge comprises a flexible ring.
Optionally, the second circumferential ridge comprises a self- reinforcing seal.
Optionally, the oxygen detector is in fluid communication with the central space.
Optionally, the package comprises a valve which in a closed state prevents gas from escaping. Optionally, the suction head is configured to engage the package such that the valve is positioned in fluid communication with the central space. The valve can be biased to the closed state.
Optionally, the apparatus is arranged for opening the valve by reducing a gas pressure of the gas in the central space.
Optionally, the apparatus is arranged for reducing a gas pressure in the central space for testing the functioning of the valve of the package.
Optionally, the apparatus is arranged for obtaining gas from inside the package for measuring oxygen content.
Optionally, the apparatus is arranged for feeding gas from inside the package to the oxygen detector until the measured oxygen content 1s constant over time.
Optionally, the apparatus further comprises a needle arranged, at least partially, in the central space for being inserted into the package for drawing oxygen out of the package.
Optionally, the apparatus further comprises a controller for controlling the pressure in the circumferential space and the central space and/or for controlling the oxygen detector. The pressure can be controlled to a predetermined pressure. The oxygen detector can be controlled to be selectively switched on and off.
Optionally, the apparatus further comprises a force and/or pressure sensor for determining the leak tightness of the package based on the force and/or pressure of the gas in the central space.
It will be appreciated that any of the aspects, features and options described in view of the method for measuring oxygen content apply equally to the apparatus for measuring oxygen content, and vice versa. It will also be clear that any one or more of the above aspects, features and options can be combined.
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 1A shows an illustration of a schematic representation of an example of a side view of a cross section of an apparatus for measuring oxygen content wherein the package is disengaged from the suction head;
Figure 1B shows an illustration of a schematic representation of an example of a side view of a cross section of an apparatus for measuring oxygen content wherein the package is engaged with the suction head;
Figure 2 shows an exemplary flow chart of a method for measuring oxygen content in a package;
Figure 3 shows an illustration of a schematic representation of an example of a bottom view of a suction head of an apparatus for measuring oxygen content;
Figure 4 shows an illustration of a schematic representation of an example of a side view of a cross section of an apparatus for measuring oxygen content; and
Figure 5 shows an illustration of a schematic representation of an example of a side view of a cross section of a suction head.
DETAILED DESCRIPTION
Figures 1A and 1B show illustrations of a schematic representation of an example of a side view of a cross section of an apparatus 1 for measuring oxygen content in a package 2 containing a gas.
The package 2 contains a solid and/or liquid substance and a gas. The apparatus 1 comprises a suction head 4 and an oxygen detector 6. In this example, the suction head 4 is smaller than the package 2. The suction head
4 comprises a first circumferential ridge 8 and a second circumferential ridge 10. The second circumferential ridge 10 is positioned radially outward with respect to the first circumferential ridge 8 and the second circumferential ridge 10 is surrounding the first circumferential ridge 8. It will be appreciated that the first and second circumferential ridges are positioned to simultaneously abut the package. Here, the first and second circumferential ridges 8,10 are positioned in the same plane on the suction head 4. However, e.g. depending on a geometry of the package, the first and second circumferential ridges may have a different relative position. The first and second ridges may e.g. be positioned axially offset with respect to each other. The first circumferential ridge 8 comprises a flexible ring in this example. The second circumferential ridge 10 comprises a flexible ring in this example. The second circumferential ridge 10 may comprise a self- reinforcing seal.
Here, the apparatus 1 comprises first and second suction means 16A,16B. The apparatus 1 comprises a first duct 22, a second duct 26, first suction ports 24A,24B and a second suction port 28 in this example. The suction head 4 is arranged for engaging a package 2. Thereto, the first and second circumferential ridges 8,10 of the suction head 4 engage the package 2. In Figure 1A, the suction head 4 is in the position prior to engaging the package 2, such that the suction head 4 is positioned close to the package 2 and there is a nonzero distance between the package 2 and the suction head 4. In Figure 1B, the suction head 4 is in the engaged position with respect to the package 2, such that the suction head 4 is touching the package 2.
The space between the first circumferential ridge 8 and the second circumferential ridge 10 forms a circumferential space 12. The space radially inward with respect to the first circumferential ridge 8 forms a central space 14. The circumferential space 12 and the central space 14 are each positioned between the suction head 4 and the package 2 when in the engaged position. The first suction ports 24A,24B are positioned in the circumferential space 12. The second suction port 28 is positioned in the central space 14. The first duct 22 connects each of the first suction ports 24A,24B to the first suction means 16A. The second duct 26 connects the second suction port 28 to the second suction means 16B and to the oxygen detector 6. The oxygen detector 6 is in this example in fluid communication with the central space 14.
The apparatus 1 is configured for, after engaging the package 2 with the first and second circumferential ridges 8,10, reducing the pressure of the gas in the circumferential space 12 to a first pressure. The first pressure is lower than atmospheric pressure, e.g. lower than 1 bara. In this example, the pressure in the circumferential space 12 is reduced at first suction ports 24A,24B by first suction means 16A. The package 2 adheres to the suction head 4 at the first pressure in the circumferential space 12. At the first pressure in the circumferential space 12, an airtight seal is formed between the first and second circumferential ridges 8,10 and the package 2.
The airtight seal causes the gas in the circumferential space 12 and in the central space 14 to be isolated from ambient air. The gas in the circumferential space 12 is isolated from the gas in the central space 14 due to the airtight seal between the first circumferential ridge 8 and the package 2. As a result, ambient air and gas particles in the circumferential space 12 are prevented from moving into the central space 14 at the first pressure in the circumferential space 12.
In this example, the package 2 comprises a valve 20. When the valve 20 is in a closed state, it prevents gas from escaping from the package 2 and/or gas entering the package 2. The valve can be biased to the closed state. The valve 20 1s positioned such that when the valve 20 is in the open state gas is allowed to escape from the package 2 via an opening 30 in the package 2. The valve 20 can be a check valve configured to allow gas to exit the package in case the gas inside the package exceeds a predetermined pressure, or a pressure difference across the valve exceeds a predetermined pressure difference. The suction head 4 is configured to engage the package 2 such that the valve 20 is positioned in fluid communication with the central space 14. The opening 30 is positioned in fluid communication with the central space 14 when the suction head 4 1s in the engaged position with respect to the package 2. In Figure 1A, the package 2 is closed as the valve 20 is in the closed state. Therefore the opening is not shown in Figure 1A.
Here, the apparatus 1 is configured for opening the valve 20 by reducing a gas pressure of the gas in the central space 14. The valve 20 can be opened after the package 2 is engaged with the suction head 4. In Figure 1B, the valve 20 is in the open state thereby allowing gas to escape from the package 2 through the opening 30. In this example, the apparatus 1 is arranged for reducing a gas pressure in the central space 14 for testing the functioning of the valve 20 of the package 2. It will be appreciated that an opening 30 can be formed in the package 2 in different ways without the presence of the valve 20 in the package 2.
After the first pressure is reached in the circumferential space 12, or already during lowering the pressure in the circumferential space towards the first pressure, the second suction means 16B draw gas out of the package 2 and move said gas through the opening 30 via the second suction port 28 to the oxygen detector 6. Here, the apparatus 1 is arranged for obtaining gas from inside the package 2 for measuring oxygen content.
The oxygen detector 6 is configured for measuring oxygen content of the gas inside the package 2 that is fed to the oxygen detector 6. The apparatus 1 is arranged for feeding gas from inside the package 2 to the oxygen detector 6 until the measured oxygen content is constant over time. The apparatus can be configured to continuously measure the oxygen content, or at, e.g. regular, time intervals. The airtight seal between the circumferential ridges 8,10 and the package 2 prevents ambient air being drawn into the central space 14 and being fed to the oxygen detector 6. As a result, only gas particles drawn from the package 2 are moved into the central space 14 and/or fed to the oxygen detector 6 via the second suction port 28. The airtight seal between the circumferential ridges 8,10 and the package 2 can also prevent gas drawn from the package 2 via the opening 30 from moving into the circumferential space 12 or the ambient air.
Figure 2 shows an example of a flow chart of a method 100 for measuring oxygen content in a package 2 containing a gas. The method can e.g. be performed using an apparatus 1 as described in view of Figures 1A and 1B. In this example of the method 100 the steps are performed in the following order. Optional steps are shown in dashed boxes. In a first step 102, a suction head 4 is provided. The package 2 is engaged with the suction head 4 in step 104.
In step 106, a gas pressure in the circumferential space 12 is reduced to a first pressure such that an airtight seal is formed between the circumferential ridges 8,10 and the package 2. In this example, in step 108 the valve 20 is opened by reducing a gas pressure of the gas in the central space 14. Alternatively, or additionally, a needle can be inserted into the package 2 adjacent the central space 14 for measuring oxygen content in step 110. Here, in step 112 gas is obtained from inside the package 2 for measuring oxygen content. Gas from inside the package 2 can be fed to the oxygen measurement unit, such as an oxygen detector 6, until the measured oxygen content is constant over time in step 114.
Oxygen content of the gas inside the package 2 1s measured through an opening 30 in the package 2 in step 116. The package 2 can be opened after step 106 and prior to step 116. Opening the package can create the opening 30 for oxygen measurement. The opening 30 is positioned, in use, in fluid communication with the central space 14. The opening 30 can be formed by the valve 20. Alternatively, or additionally, the opening 30 can be punched, e.g. using a needle. Step 116 can comprise feeding gas drawn out of the package 2 through the opening 30 in the package 2 to an oxygen measurement unit, such as oxygen detector 6. During step 116, the opening
30 can be at least partially open. The functioning of the valve 20 of the package 2 can be tested in step 118. In step 120, the leak tightness of the package 2 can be determined based on the force and/or pressure of the gas in the central space 14.
Figure 3 shows an illustration of a schematic representation of an example of a bottom view of a suction head 4 of an apparatus 1 for measuring oxygen content in a package 2 containing a gas. The suction head 4 comprises the first circumferential ridge 8 and the second circumferential ridge 10. The first and second circumferential ridges 8,10 delimit, together with the suction head 4 and the package 2, the circumferential space 12 and the central space 14. The second circumferential ridge 10 is in this example arranged at the perimeter of the suction head 4. Here, the first and second circumferential ridges 8,10 each comprise a flexible ring. Here, the second circumferential ridge 10 comprises a self-reinforcing seal. In this example, the suction head 4 comprises two first suction ports 24A,24B and a second suction port 28. The two first suction ports 24A,24B are positioned in the circumferential space 12. It will be appreciated that there can be one or more than two first suction ports 24A,24B in the circumferential space 12 instead. The second suction port 28 is positioned in the central space 14.
Alternatively, there can be more than one second suction port 28 in the central space 14. Here, the suction head 4 comprises a substantially cylindrical shape. It will be appreciated that the suction head 4 can comprise a different shape, such as a cone, rectangular block or cube.
Figure 4 shows an illustration of a schematic representation of an example of a side view of a cross section of an apparatus 1 for measuring oxygen content of a package 2 containing a gas. In Figure 4, the package 2 is engaged with the suction head 4. In this example, the apparatus 1 comprises a needle 32. The needle 32 is arranged to create an opening 30 in the package 2. In this example, the needle is, at least partially, in the central space 14. The needle can be inserted into the package 2 for drawing oxygen out of the package 2. The needle 32 can be arranged for being inserted into the package 2 via the valve 20 instead.
In this example, the apparatus 1 comprises a controller 18. The controller 18 is in this example configured for controlling the pressure in the circumferential space 12 and the central space 14 via the first and second suction means 16A,16B. Here, the controller 18 is also configured for controlling the oxygen detector 6.
In this example, the apparatus 1 comprises a force and/or pressure sensor 34. The force and/or pressure sensor 34 is configured for determining the leak tightness of the package 2 based on the force and/or pressure of the gas in the central space 14.
Figure 5 shows an illustration of a schematic representation of an example of a side view of a cross section of a suction head 4. In this example, the second circumferential ridge 10 of the suction head 4 comprises a self- reinforcing seal. Alternatively or additionally, the first circumferential ridge 8 can comprise a self-reinforcing seal. For clarity purposes, the ducts 22,26 and suction ports 24A,24B, 28 are not shown in the example of Figure 5. It will be appreciated that the suction head 4 of Figure 5 can comprise the features as described in accordance with Figures 1-4.
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.
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 (26)

CONCLUSIESCONCLUSIONS 1. Werkwijze voor het meten van het zuurstofgehalte in een verpakking die een gas bevat, omvattend: - het verschaffen van een zuigkop; - het aangrijpen van de verpakking met de zuigkop met een eerste rondlopende rand en een tweede rondlopende rand die de eerste rondlopende rand omringt, waarbij een omtrekruimte wordt gevormd door de ruimte tussen de eerste rondlopende rand en de tweede rondlopende rand, en waarbij een centrale ruimte wordt gevormd door de ruimte radiaal binnen de eerste rondlopende rand; - het verlagen van een gasdruk in de omtrekruimte naar een eerste druk zodanig dat een luchtdichte afdichting wordt gevormd tussen de rondlopende randen en de verpakking; en - het meten van het zuurstofgehalte van het gas in de verpakking door een opening in de verpakking gepositioneerd, in gebruik, in fluidum communicatie met de centrale ruimte.1. A method for measuring the oxygen content in a package containing a gas, comprising: - providing a suction head; - engaging the package with the suction head having a first circumferential edge and a second circumferential edge surrounding the first circumferential edge, a peripheral space being formed by the space between the first circumferential edge and the second circumferential edge, and a central space being formed by the space radially inside the first circumferential edge; - reducing a gas pressure in the circumferential space to a first pressure such that an airtight seal is formed between the circumferential edges and the package; and - measuring the oxygen content of the gas in the package through an opening in the package positioned, in use, in fluid communication with the central space. 2. Werkwijze volgens conclusie 1, waarbij het meten van het zuurstofgehalte van het gas in de verpakking het voeren van gas onttrokken aan de verpakking door de opening in de verpakking aan een zuurstofmeeteenheid omvat.2. The method of claim 1, wherein measuring the oxygen content of the gas in the package comprises passing gas extracted from the package through the opening in the package to an oxygen measuring unit. 3. Werkwijze volgens conclusie 1 of 2, waarbij de eerste en tweede rondlopende randen zijn gepositioneerd in hetzelfde vlak op de zuigkop.3. The method of claim 1 or 2, wherein the first and second circumferential edges are positioned in the same plane on the suction head. 4. Werkwijze volgens conclusie 1, 2 of 3, waarbij de tweede rondlopende rand is ingericht op of bij de omtrek van de zuigkop.4. A method according to claim 1, 2 or 3, wherein the second circumferential edge is arranged on or near the periphery of the suction head. 5. Werkwijze volgens een der voorgaande conclusies, waarbij de tweede rondlopende rand een zelfversterkende afdichting omvat en/of de eerste rondlopende rand een flexibele ring omvat.5. A method according to any preceding claim, wherein the second circumferential edge comprises a self-reinforcing seal and/or the first circumferential edge comprises a flexible ring. 6. Werkwijze volgens een der voorgaande conclusies, waarbij de verpakking een klep omvat die gepositioneerd is grenzend aan de centrale ruimte bij het aangrijpen van de verpakking met de zuigkop, waarbij de klep in een gesloten toestand voorkomt dat gas ontsnapt.6. A method according to any preceding claim, wherein the package comprises a valve positioned adjacent the central space upon engagement of the package with the suction head, the valve in a closed position preventing gas from escaping. 7. Werkwijze volgens conclusie 6, verder omvattend het openen van de klep door het verlagen van een gasdruk van het gas in de centrale ruimte.7. The method of claim 6, further comprising opening the valve by reducing a gas pressure of the gas in the central space. 8. Werkwijze volgens conclusie 6 of 7, verder omvattend het testen van het functioneren van de klep van de verpakking.8. The method of claim 6 or 7, further comprising testing the functioning of the valve of the package. 9. Werkwijze volgens een der voorgaande conclusies, verder omvattend het verkrijgen van gas van binnen de verpakking voor het meten van het zuurstofgehalte.9. A method according to any preceding claim, further comprising obtaining gas from within the package for measuring oxygen content. 10. Werkwijze volgens een der voorgaande conclusies, voor zover afhankelijk van conclusie 2, verder omvattend het toevoeren van gas van binnen de verpakking naar de zuurstofmeeteenheid totdat het gemeten zuurstofgehalte constant is over de tijd.10. A method according to any preceding claim, when dependent on claim 2, further comprising supplying gas from within the package to the oxygen measuring unit until the measured oxygen content is constant over time. 11. Werkwijze volgens een der voorgaande conclusies, verder omvattend het inbrengen van een naald in de verpakking grenzend aan de centrale ruimte voor het meten van het zuurstofgehalte.11. A method according to any preceding claim, further comprising inserting a needle into the package adjacent the central space for measuring the oxygen content. 12. Werkwijze volgens een der voorgaande conclusies, verder omvattend het bepalen van de lekdichtheid van de verpakking op basis van de kracht en/of druk van het gas in de centrale ruimte.12. A method according to any preceding claim, further comprising determining the leak tightness of the package based on the force and/or pressure of the gas in the central space. 13. Apparaat voor het meten van het zuurstofgehalte in een verpakking die een gas bevat, omvattend: - een zuigkop ingericht voor het aangrijpen van een verpakking, omvattend: - een eerste rondlopende rand en een tweede rondlopende rand die de eerste rondlopende rand omringt, waarbij een omtrekruimte wordt gevormd door de ruimte tussen de eerste rondlopende rand en de tweede rondlopende rand, en waarbij een centrale ruimte wordt gevormd door de ruimte radiaal binnen de eerste rondlopende rand; en - een zuurstofdetector; waarbij het apparaat is geconfigureerd voor: na het aangrijpen van de verpakking met de eerste en tweede rondlopende randen, het verlagen van een gasdruk in de omtrekruimte naar een eerste druk zodanig dat een luchtdichte afdichting wordt gevormd tussen de rondlopende randen en de verpakking; en het meten van het zuurstofgehalte van het gas in de verpakking door het toevoeren van gas onttrokken aan de verpakking, door een opening in de verpakking die, in gebruik, gepositioneerd is in fluïdum communicatie met de centrale ruimte, aan de zuurstofdetector.13. Apparatus for measuring the oxygen content of a package containing a gas, comprising: - a suction head adapted to engage a package, comprising: - a first circumferential edge and a second circumferential edge surrounding the first circumferential edge, a peripheral space being defined by the space between the first circumferential edge and the second circumferential edge, and a central space being defined by the space radially inside the first circumferential edge; and - an oxygen detector; the apparatus being configured for: after engaging the package with the first and second circumferential edges, reducing a gas pressure in the circumferential space to a first pressure such that an airtight seal is formed between the circumferential edges and the package; and measuring the oxygen content of the gas in the package by supplying gas extracted from the package, through an opening in the package which, in use, is positioned in fluid communication with the central space, to the oxygen detector. 14. Apparaat volgens conclusie 13, waarbij de eerste en tweede rondlopende randen zijn gepositioneerd in hetzelfde vlak op de zuigkop.14. The apparatus of claim 13, wherein the first and second circumferential edges are positioned in the same plane on the suction head. 15. Apparaat volgens conclusie 13 of 14, waarbij de tweede rondlopende rand is ingericht op of bij de omtrek van de zuigkop.15. Apparatus according to claim 13 or 14, wherein the second circumferential edge is arranged on or near the periphery of the suction head. 16. Apparaat volgens conclusie 13, 14 of 15, waarbij de tweede rondlopende rand een zelfversterkende afdichting omvat en/of de eerste rondlopende rand een flexibele ring omvat.16. Apparatus according to claim 13, 14 or 15, wherein the second circumferential rim comprises a self-reinforcing seal and/or the first circumferential rim comprises a flexible ring. 17. Apparaat volgens een der conclusies 13-16, waarbij de zuurstofdetector in fluïdum communicatie is met de centrale ruimte.17. The apparatus of any one of claims 13 to 16, wherein the oxygen detector is in fluid communication with the central space. 18. Apparaat volgens een der conclusies 13-17, waarbij de verpakking een klep omvat die in een gesloten toestand voorkomt dat gas ontsnapt, en waarbij de zuigkop is geconfigureerd om de verpakking zodanig aan te grijpen dat de klep is gepositioneerd in fluïdum communicatie met de centrale ruimte.18. The apparatus of any one of claims 13 to 17, wherein the package includes a valve that prevents gas from escaping when closed, and wherein the suction head is configured to engage the package such that the valve is positioned in fluid communication with the central space. 19. Apparaat volgens conclusie 18, waarbij het apparaat is ingericht voor het openen van de klep door het verlagen van een gasdruk van het gas in de centrale ruimte.19. Apparatus according to claim 18, wherein the apparatus is adapted to open the valve by reducing a gas pressure of the gas in the central space. 20. Apparaat volgens conclusie 18 of 19, waarbij het apparaat is ingericht voor het verlagen van een gasdruk in de centrale ruimte voor het testen van het functioneren van de klep van de verpakking.20. Apparatus according to claim 18 or 19, wherein the apparatus is adapted to reduce a gas pressure in the central space for testing the functioning of the valve of the package. 21. Apparaat volgens een der conclusies 13-20, waarbij het apparaat is ingericht voor het verkrijgen van gas van binnen de verpakking voor het meten van het zuurstofgehalte.21. Apparatus according to any one of claims 13 to 20, wherein the apparatus is adapted to obtain gas from within the package for measuring the oxygen content. 22. Apparaat volgens een der conclusies 13-21, waarbij het apparaat is ingericht voor het toevoeren van gas van binnen de verpakking aan de zuurstofdetector totdat het gemeten zuurstofgehalte constant is over de tijd.22. Apparatus according to any one of claims 13 to 21, wherein the apparatus is adapted to supply gas from within the package to the oxygen detector until the measured oxygen content is constant over time. 23. Apparaat volgens een der conclusies 13-22, verder omvattend een naald ingericht, ten minste gedeeltelijk, in de centrale ruimte om te worden ingebracht in de verpakking voor het onttrekken van zuurstof uit de verpakking.23. The apparatus of any one of claims 13 to 22, further comprising a needle configured, at least partially, in the central space to be inserted into the package for extracting oxygen from the package. 24. Apparaat volgens conclusie 23, waarbij de naald is ingericht om te worden ingebracht in de verpakking via de klep.24. The apparatus of claim 23, wherein the needle is adapted to be inserted into the package through the valve. 25. Apparaat volgens een der conclusies 13-24, verder omvattend een controller voor het regelen van de druk in de omtrekruimte en de centrale ruimte en/of voor het regelen van de zuurstofdetector.25. Apparatus according to any of claims 13 to 24, further comprising a controller for controlling the pressure in the peripheral space and the central space and/or for controlling the oxygen detector. 26. Apparaat volgens een der conclusies 13-25, verder omvattend een kracht- en/of druksensor voor het bepalen van de lekdichtheid van de verpakking op basis van de kracht en/of druk van het gas in de centrale ruimte.26. Apparatus according to any of claims 13 to 25, further comprising a force and/or pressure sensor for determining the leak tightness of the package based on the force and/or pressure of the gas in the central space.
NL2035990A 2023-10-09 2023-10-09 A method and apparatus for measuring oxygen content NL2035990B1 (en)

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Citations (3)

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US3861116A (en) * 1972-07-15 1975-01-21 Hesser Ag Maschf Apparatus for determining the oxygen content of filled packaging containers
WO2008022815A1 (en) * 2006-08-25 2008-02-28 Interprise Brussels S.A. Method and assembly for the controlled change of the gas content inside a package
WO2016137326A1 (en) * 2015-02-27 2016-09-01 Aartsleakandpressure B.V. System for degassing a package

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US5212993A (en) * 1992-04-20 1993-05-25 Modern Controls, Inc. Gas sampling system and method
NL1031672C2 (en) * 2006-04-24 2007-10-25 Interprise Brussels S A Method and assembly for determining a pressure prevailing in at least one package.

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US3861116A (en) * 1972-07-15 1975-01-21 Hesser Ag Maschf Apparatus for determining the oxygen content of filled packaging containers
WO2008022815A1 (en) * 2006-08-25 2008-02-28 Interprise Brussels S.A. Method and assembly for the controlled change of the gas content inside a package
WO2016137326A1 (en) * 2015-02-27 2016-09-01 Aartsleakandpressure B.V. System for degassing a package

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