WO2022263292A1 - Verfahren und vorrichtung zur vollbehälterinspektion - Google Patents
Verfahren und vorrichtung zur vollbehälterinspektion Download PDFInfo
- Publication number
- WO2022263292A1 WO2022263292A1 PCT/EP2022/065732 EP2022065732W WO2022263292A1 WO 2022263292 A1 WO2022263292 A1 WO 2022263292A1 EP 2022065732 W EP2022065732 W EP 2022065732W WO 2022263292 A1 WO2022263292 A1 WO 2022263292A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- container
- radiation
- detection device
- designed
- recording
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000001514 detection method Methods 0.000 claims abstract description 44
- 230000005855 radiation Effects 0.000 claims abstract description 34
- 238000011156 evaluation Methods 0.000 claims abstract description 12
- 230000001154 acute effect Effects 0.000 claims abstract description 8
- 238000005286 illumination Methods 0.000 claims description 33
- 238000007689 inspection Methods 0.000 claims description 26
- 230000003760 hair shine Effects 0.000 claims description 3
- 238000003384 imaging method Methods 0.000 abstract 1
- 239000011521 glass Substances 0.000 description 28
- 206010041662 Splinter Diseases 0.000 description 8
- 239000003086 colorant Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 235000013361 beverage Nutrition 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/90—Investigating the presence of flaws or contamination in a container or its contents
- G01N21/9018—Dirt detection in containers
- G01N21/9027—Dirt detection in containers in containers after filling
Definitions
- the invention relates to a method and a device for inspecting filled containers for foreign bodies, comprising a planar illumination device, a detection device and an evaluation device, the detection device being aligned at an acute angle to the horizontal on the bottom area of the container to be inspected.
- the present invention is intended in particular for use in automatic filling systems in the beverage, food and pharmaceutical industries, in which containers are transported at high speeds of up to 90,000 bottles per hour.
- the containers are here performed on transport devices, which usually include a umlau Fendes conveyor belt or a circulating link chain.
- the invention is intended for the inspection of filled containers.
- filled containers are checked for possible contamination or foreign objects after filling.
- Typical foreign bodies are glass splinters that have arisen during previous container treatment steps, for example during cleaning, during filling or during the sealing process, and have been introduced into the container. Such glass splinters can only be identified inadequately using conventional methods.
- the casks must be lifted off the transport equipment for inspection, in particular for base inspection, so that the cask base can be recorded in terms of radiation. This requires additional devices that complicate the overall structure of the inspection device.
- a method for inspecting filled containers for foreign bodies comprising the provision of a planar illumination device that is designed to emit radiation that shines through a container to be inspected, the provision of a detection device that is designed to detect the radiation, which was emitted by the illumination device and has irradiated the container and to create a recording of the container on the basis of the detected radiation, as well as the provision of an evaluation device which is designed to evaluate the recording made by the detection device.
- the detection device is aimed at the bottom area of the container to be inspected at an acute angle relative to the horizontal. A foreign object on the bottom of the container is recognized as a local disturbance in the image recording.
- a filled transparent container has the optical effect of a cylindrical lens.
- Light that is visible in the transmitted light image of a filled container and has illuminated the entire cross-section of the container originates from a relatively small area around the focal point or focal line of the container's cylindrical lens.
- a comparatively narrow illumination optics with a high luminous intensity can therefore be used.
- the lighting device is projected onto the camera through the filled bottle as a cylindrical lens. Since the lighting device has a smaller width than the container to be examined or than the diameter of the container to be examined, it is simultaneously avoided that interfering light passes directly past the bottle and directly into the detection device. Disturbing reflections from neighboring containers also do not occur. This achieves a significantly higher signal-to-noise ratio between the useful light through the bottle and the disturbing incident or reflected light.
- the present invention can be used to inspect containers made of any transparent material.
- the present method is particularly suitable for inspecting glass containers such as clear glass bottles, colored glass bottles and transparent plastic containers such as PET bottles.
- the flat lighting device preferably has a width that is smaller than the width or the diameter of the container to be examined.
- the width of the lighting device can advantageously be adapted to the respective inspection task.
- Bottles typically used in the beverage industry are cylindrical in shape and have a diameter of between about 5 and 15 cm.
- containers used in the pharmaceutical industry can be significantly smaller and have diameters of between approximately 1 and 3 cm.
- the planar illumination device can therefore preferably have a width of less than 4 cm, preferably less than 2 cm and particularly preferably less than 1 cm.
- the flat lighting device can preferably have a width of 10 to 90% of the diameter of the container to be examined.
- the flat lighting device can preferably have a width of 20 to 80% of the diameter of the container to be examined.
- the flat lighting device can preferably have a width of 30 to 70% of the diameter of the container to be examined.
- the diameter is understood to be the dimension that has the smallest dimensions. If the lighting device has a width less than the diameter of the containers so defined, this ensures that no light can get past the container directly into the detection device.
- the height of the lighting device can also advantageously be adapted to the respective inspection task.
- the height of the planar lighting device can be selected so that it roughly corresponds to the height of the containers to be examined.
- the flat lighting device can have a height of less than 30 cm, preferably less than 25 cm and particularly preferably less than 15 cm.
- the height and/or width of the emission surface of the lighting device is preferably adjustable and can be adapted to the respective container size.
- a screen can be provided which delimits the radiating surface of the lighting device.
- Such a screen can be designed to be adjustable by motor, so that the screen is automatically adapted to the size of the container to be inspected, for example when the inspection device is initialized.
- the lighting device is preferably set up to emit electromagnetic radiation.
- the lighting device is also preferably set up to emit light in the visible range.
- the lighting device can also be designed to emit UV or infrared light or a combination thereof. Infrared radiation can be used to advantage with colored containers, particularly brown glass bottles.
- the lighting device can be in the form of a flat lighting means which emits essentially monochromatic, for example white, visible light.
- the planar lighting device can also have a large number of individual radiation sources. These radiation sources can be LEDs, LCDs or OLEDs. In this case, the individual radiation sources of the lighting device can then also be controlled as a function of the container shape, so that the size of the radiating surface of the lighting device can be varied in this way.
- the inspection accuracy can be further increased if you use a lighting device that has lighting areas with different radiation characteristics.
- the lighting device can be designed to generate color-coded lighting. Color-coded lighting means that the lighting has any geometric color pattern. Glass splinters or glass chips cause light refraction. This refraction of light changes the local hue in the image recorded by the detection device. In cases in which the total reflection alone only leads to relatively small intensity changes in the image recording, local changes in the hue can still indicate foreign bodies or defects on the bottom of the container.
- the color-coded illumination can be, for example, a stripe pattern consisting of a plurality of horizontal illumination strips arranged one above the other, the illumination strips each emitting light of a different colour.
- the light hits the bottom of the container at different angles, is totally reflected there and deflected into the detection device.
- a splinter of glass from the glass chip on the bottom of the container disrupts the total reflection and causes light refraction, which changes the color composition of the radiation detected by the detection device. This hue-changing property enables the detection of such defects on the bottom of the container that would otherwise not be detectable solely through differences in contrast and transparency in the image recording.
- a color film can be provided in the beam path between the lighting device and the container to be examined to produce color-coded lighting.
- the color film then has a corresponding colored pattern, as a result of which the individual lighting areas are formed.
- the color-coded lighting can be designed to be particularly flexible if the planar lighting device has a large number of individual radiation sources such as the LEDs or OLEDs already mentioned above.
- the lighting device consists of multicolored LEDs and UV LEDs
- a predetermined color-coded lighting can be set via software parameterization.
- any color pattern can be set.
- a diffuser can be used to achieve soft color gradients between the individual lighting areas. This can further increase the sensitivity of the device.
- the lighting device can also be formed by a beamer or a projector.
- a beamer has the advantage that any color pattern can be specified by the software.
- color patterns can be used in a targeted manner that are specially adapted to specific container shapes.
- special patterns can thus be used.
- Such patterns can then be particularly suitable, for example, for inspecting individual bottles with certain embossings.
- the lighting areas do not necessarily have to be designed to emit different colors. Alternatively or additionally, the lighting areas can also differ in terms of other emission characteristics. In addition to the emitted color, the different illumination areas can also differ from one another with regard to the polarization, the intensity and/or the phase of the emitted light.
- the color coding is only given here as an example for these emission characteristics and is described in more detail.
- the lighting device can be operated in a pulsed manner and controlled in such a way that the radiation pulses are only emitted when a container to be examined is located in front of the lighting device.
- the lighting device can also be operated continuously.
- the detection device is preferably a commercially available color camera, in particular a semiconductor camera. Infrared and UV cameras can also be used. In order to avoid or reduce motion blur, shutter cameras with short shutter speeds can be used. This is particularly advantageous when the lighting device is operated continuously.
- the detection device preferably detects an image of each container to be examined. In this way, a high inspection speed can be guaranteed. Alternatively, the detection device can detect multiple images of each container to be examined.
- the recordings can can be detected, for example with a time delay of 100 ps to 1000 ps, preferably about 300 ps.
- the time-delayed recordings are preferably detected as a function of the transport speed of the containers to be examined. Since three-dimensional container structures such as decorative elements produce light scattering, time-delayed recordings can make it easier to identify the local color contrast that occurs in the area of decorative elements. It is also conceivable to provide a plurality of detection devices which are each designed to detect at least one recording of the container to be examined. The detection devices are preferably arranged in such a way that they can take pictures of the container to be examined from different directions.
- the lighting device can be controlled between the different pictures, so that the lighting between the pictures can be modified.
- An individual color pattern can thus be generated for each recording.
- the colors emitted by the illumination areas can be changed.
- the shape of the lighting areas can be varied.
- vertical, strip-shaped illumination areas could be used in a first recording, while horizontal, strip-shaped illumination areas are used in a second recording.
- a color image of the container is usually created with the camera in the RGB color space.
- the evaluation device is advantageously designed to convert the recording made by the detection device of the container to be examined into a recording in the FISV or FISL color space.
- the FISV color space results in a color value recording or color value Fl, a fill value recording or fill value V or L and a saturation recording or saturation S.
- the fill value recording corresponds to the recording of a conventional inspection device with a monochromatic radiation source and allows conclusions to be drawn about local brightness contrasts.
- the color value signal Fl can also be used for further evaluation be used.
- foreign bodies should also show local disturbances in the color contrast.
- the evaluation device detects the presence of a three-dimensional foreign body such as a glass splinter in this area.
- the saturation S can also be used to assess the significance of the color contrast signal.
- the special evaluation device can also be used to identify structures such as glass chips that cause essentially no or only a low local brightness contrast but cause a local color contrast.
- Glass chips can be an indication of glass splinters in the container. Such containers should therefore not be put on the market. As a rule, such glass chips cannot be detected with conventional methods.
- Suitable filter and classification methods are used for image evaluation.
- a 360° inspection of containers can also be implemented.
- two inspection stations arranged one behind the other can be provided.
- the containers, which are already conveyed on a transport device, are fed to these two inspection stations one after the other.
- the containers are turned by 90° between the inspection stations during transport. As a result, the containers are inspected in two mutually orthogonal alignments.
- the evaluation device can control the sorting out of containers depending on the inspection result.
- Containers in which a foreign body or a piece of broken glass has been detected on the bottom of the container are preferably sorted out of the filling process by a ejection device
- the invention also relates to a device for foreign body inspection of filled containers, comprising:
- a planar illumination device wherein the illumination device is designed to emit radiation that shines through a container to be examined, - a detection device, which is designed to detect the radiation which was emitted by the illumination device and has penetrated the container and based on the detected radiation to create a recording of the container, and
- an evaluation device that is designed to evaluate the recording made by the detection device, with the detection device being aligned at an acute angle to the florizontal on the bottom area of the container to be inspected, and with a foreign body located on the bottom of the container as a local disturbance in the image recording is detected.
- FIG. 1 top view of an inspection device according to the invention
- FIG. 2 side view of an inspection device according to the invention
- FIG. 3 beam path in a filled glass bottle
- FIG. 4 beam path in an empty glass bottle
- FIG. 5 beam path in a filled glass bottle with a cuboid glass foreign body
- FIG. 6 beam path in a filled glass bottle with a spherical foreign body of its own glass
- FIG. 7 Color image of a container bottom with glass splinters.
- FIG. 1 shows the inspection device according to the invention in a plan view.
- containers 10 such as glass bottles are examined for foreign bodies.
- the containers 10 are transported through the inspection device on a transport device 12 .
- a planar illumination device 14 and a detection device 16 are provided for identifying the foreign bodies.
- the radiation generated by the planar illumination device 14 is imaged in the detection device 16 by the filled container 10, which acts like a cylindrical lens. Since the lighting device 14 is narrower than the diameter of the container age 10, only such radiation is imaged in the detection device 16, which has passed through the container 10.
- the planar lighting device 14 is designed to generate color-coded lighting.
- the illumination device 14 is segmented horizontally and has a stripe pattern.
- the stripe pattern consists of strip-shaped illumination areas 18a-18n arranged one above the other. Each of these strip-shaped illumination areas 18 emits light of different colors.
- the detection device 16 is a commercially available CCD camera. This is arranged at an acute angle a with respect to the florizontal area and on the floor area 11 of the container 10.
- the detection device 16 is designed in such a way that only radiation from the direction of the container bottom 11 is detected.
- the detection device 16 is provided with a corresponding screen 20 .
- Total reflection occurs at the container bottom 11 when the light beams emerge from the container, so that radiation from a plurality of illumination areas 18 is imaged from the entire container bottom 11 into the detection device 16 .
- the beam path is explained schematically using a container 10, which has the shape of a conventional GdB bottle.
- the container 10 is located between a horizontally segmented lighting device 14 with 5 lighting regions 18a-e arranged one above the other and a detection device 16.
- the calculated beam path is shown for a large number of exemplary incident beams 22.
- FIG. 3 shows the calculated beam path for a GdB bottle filled with water.
- a GdB bottle filled with water.
- light from all different illumination areas 18a-e is totally reflected on the container bottom 11 and imaged in the detection device 16.
- the container bottom 11 appears as a bright area in such a recording, because light from all the different illumination areas 18a-e is superimposed and formed in the detection device 16.
- FIGS. 5 and 6 show the calculated beam path for a GdB bottle filled with water, with a cuboid (FIG. 5) or a spherical (FIG. 6) foreign body 24 on the container bottom.
- a cuboid FIG. 5
- a spherical FIG. 6
- the refraction of light at the foreign body 24 changes the beam path so that light from other illumination areas 18 is imaged onto the detection device 16 .
- the color composition of the total radiation that is imaged in the detection device 16 changes locally. This color disturbance can be used to detect the foreign body 24 .
- FIG. 7 shows a photograph of a container 10 created using the method according to the invention.
- the recording shows two small shards of glass 26, which stand out as a clear disturbance of the local color space in the area of the container bottom 11. These broken pieces of glass 26 would not have been recognizable with a conventional transmitted light method.
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Analysing Materials By The Use Of Radiation (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112023024356A BR112023024356A2 (pt) | 2021-06-15 | 2022-06-09 | Método e dispositivo para inspeção de recipiente cheio |
EP22732233.6A EP4356116A1 (de) | 2021-06-15 | 2022-06-09 | Verfahren und vorrichtung zur vollbehälterinspektion |
CN202280042897.7A CN118056125A (zh) | 2021-06-15 | 2022-06-09 | 用于装满容器检查的方法和设备 |
CA3220259A CA3220259A1 (en) | 2021-06-15 | 2022-06-09 | Method and apparatus for inspecting full containers |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102021115493.6 | 2021-06-15 | ||
DE102021115493.6A DE102021115493A1 (de) | 2021-06-15 | 2021-06-15 | Verfahren und Vorrichtung zur Vollbehälterinspektion |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022263292A1 true WO2022263292A1 (de) | 2022-12-22 |
Family
ID=82117660
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2022/065732 WO2022263292A1 (de) | 2021-06-15 | 2022-06-09 | Verfahren und vorrichtung zur vollbehälterinspektion |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP4356116A1 (de) |
CN (1) | CN118056125A (de) |
BR (1) | BR112023024356A2 (de) |
CA (1) | CA3220259A1 (de) |
DE (1) | DE102021115493A1 (de) |
WO (1) | WO2022263292A1 (de) |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4459023A (en) * | 1981-06-30 | 1984-07-10 | Kirin Beer Kabushiki Kaisha | Electro-optic inspection system for transparent or semitransparent containers |
JPH02114158A (ja) * | 1988-10-24 | 1990-04-26 | Hitachi Plant Eng & Constr Co Ltd | アンプル等の容器の異物検査装置 |
US5486693A (en) * | 1994-02-17 | 1996-01-23 | Thermedics Detection Inc. | Detection of turbid contaminants in containers by detecting scattered radiant energy |
DE29706425U1 (de) * | 1997-04-10 | 1998-08-06 | Heuft Systemtechnik Gmbh, 56659 Burgbrohl | Vorrichtung zum Erkennen von diffus streuenden Verunreinigungen in transparenten Behältern |
JP2004317426A (ja) * | 2003-04-18 | 2004-11-11 | Kirin Techno-System Corp | 容器の底異物検査装置 |
US20100220919A1 (en) * | 2005-09-05 | 2010-09-02 | Thomas Leclerc | Method and installation for detecting foreign bodies inside a container |
JP2019053000A (ja) * | 2017-09-19 | 2019-04-04 | キリンテクノシステム株式会社 | 異物検査装置 |
DE102019208299A1 (de) * | 2019-06-06 | 2020-12-10 | Krones Ag | Verfahren und Vorrichtung zur optischen Inspektion von Behältern |
DE102019208295A1 (de) * | 2019-06-06 | 2020-12-10 | Krones Ag | Verfahren und Vorrichtung zur optischen Inspektion von Behältern |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
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US4025202A (en) | 1975-08-07 | 1977-05-24 | Ball Brothers Service Corporation | Method and apparatus for inspecting the bottoms of hollow glass articles |
US4492475A (en) | 1982-03-02 | 1985-01-08 | Eisai Co., Ltd. | Method of detecting foreign matters mixed in a liquid contained in transparent receptacles and apparatus relevant thereto |
CH686616A5 (de) | 1994-11-28 | 1996-05-15 | Elpatronic Ag | Verfahren und Vorrichtung zur Prufung einer Mehrwegflasche auf Verunreinigungen. |
CH691830A5 (de) | 1997-09-18 | 2001-10-31 | Elpatronic Ag | Verfahren und Vorrichtung zur Flascheninspektion. |
DE10140010A1 (de) | 2001-08-16 | 2003-03-13 | Krones Ag | Verfahren und Vorrichtung zur Inspektion gefüllter und verschlossener Flaschen |
JP4274006B2 (ja) | 2004-03-12 | 2009-06-03 | 株式会社日立プラントテクノロジー | 容器内異物検出装置 |
DE102010018824B4 (de) | 2010-04-29 | 2021-02-04 | Krones Aktiengesellschaft | Fremdstofferkennung in abgefüllten Flaschen |
JP2012122912A (ja) | 2010-12-10 | 2012-06-28 | Kirin Techno-System Co Ltd | 検査領域の決定方法および異物検査装置 |
DE102014216188A1 (de) | 2014-08-14 | 2016-02-18 | Krones Ag | Optisches Inspektionsverfahren und optische Inspektionsvorrichtung für Behälter |
-
2021
- 2021-06-15 DE DE102021115493.6A patent/DE102021115493A1/de active Pending
-
2022
- 2022-06-09 WO PCT/EP2022/065732 patent/WO2022263292A1/de active Application Filing
- 2022-06-09 BR BR112023024356A patent/BR112023024356A2/pt unknown
- 2022-06-09 CA CA3220259A patent/CA3220259A1/en active Pending
- 2022-06-09 CN CN202280042897.7A patent/CN118056125A/zh active Pending
- 2022-06-09 EP EP22732233.6A patent/EP4356116A1/de active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4459023A (en) * | 1981-06-30 | 1984-07-10 | Kirin Beer Kabushiki Kaisha | Electro-optic inspection system for transparent or semitransparent containers |
JPH02114158A (ja) * | 1988-10-24 | 1990-04-26 | Hitachi Plant Eng & Constr Co Ltd | アンプル等の容器の異物検査装置 |
US5486693A (en) * | 1994-02-17 | 1996-01-23 | Thermedics Detection Inc. | Detection of turbid contaminants in containers by detecting scattered radiant energy |
DE29706425U1 (de) * | 1997-04-10 | 1998-08-06 | Heuft Systemtechnik Gmbh, 56659 Burgbrohl | Vorrichtung zum Erkennen von diffus streuenden Verunreinigungen in transparenten Behältern |
JP2004317426A (ja) * | 2003-04-18 | 2004-11-11 | Kirin Techno-System Corp | 容器の底異物検査装置 |
US20100220919A1 (en) * | 2005-09-05 | 2010-09-02 | Thomas Leclerc | Method and installation for detecting foreign bodies inside a container |
JP2019053000A (ja) * | 2017-09-19 | 2019-04-04 | キリンテクノシステム株式会社 | 異物検査装置 |
DE102019208299A1 (de) * | 2019-06-06 | 2020-12-10 | Krones Ag | Verfahren und Vorrichtung zur optischen Inspektion von Behältern |
DE102019208295A1 (de) * | 2019-06-06 | 2020-12-10 | Krones Ag | Verfahren und Vorrichtung zur optischen Inspektion von Behältern |
Also Published As
Publication number | Publication date |
---|---|
CN118056125A (zh) | 2024-05-17 |
BR112023024356A2 (pt) | 2024-02-06 |
DE102021115493A1 (de) | 2022-12-15 |
EP4356116A1 (de) | 2024-04-24 |
CA3220259A1 (en) | 2022-12-22 |
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