EP3983739A1 - Verfahren zur trocknung von schüttgut, insbesondere feststoffen, wie granulate, pulver, körner, folien, schnipsel, o. dgl., vorzugsweise kunststoffgranulat - Google Patents
Verfahren zur trocknung von schüttgut, insbesondere feststoffen, wie granulate, pulver, körner, folien, schnipsel, o. dgl., vorzugsweise kunststoffgranulatInfo
- Publication number
- EP3983739A1 EP3983739A1 EP20737332.5A EP20737332A EP3983739A1 EP 3983739 A1 EP3983739 A1 EP 3983739A1 EP 20737332 A EP20737332 A EP 20737332A EP 3983739 A1 EP3983739 A1 EP 3983739A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- container
- drying
- containers
- time
- loading
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 158
- 238000001035 drying Methods 0.000 title claims abstract description 132
- 238000000034 method Methods 0.000 title claims abstract description 47
- 239000008187 granular material Substances 0.000 title claims abstract description 18
- 239000000843 powder Substances 0.000 title claims abstract description 9
- 239000011888 foil Substances 0.000 title claims abstract description 7
- 239000007787 solid Substances 0.000 title claims abstract description 7
- 239000004033 plastic Substances 0.000 title claims description 38
- 229920003023 plastic Polymers 0.000 title claims description 38
- 239000013590 bulk material Substances 0.000 claims abstract description 71
- 238000011068 loading method Methods 0.000 claims abstract description 50
- 238000004519 manufacturing process Methods 0.000 claims abstract description 28
- 238000012545 processing Methods 0.000 claims abstract description 22
- 230000001186 cumulative effect Effects 0.000 claims abstract description 5
- 230000008569 process Effects 0.000 claims description 17
- 238000001746 injection moulding Methods 0.000 claims description 14
- 230000008859 change Effects 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 4
- 239000002131 composite material Substances 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000002347 injection Methods 0.000 description 9
- 239000007924 injection Substances 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 239000003463 adsorbent Substances 0.000 description 3
- 230000006399 behavior Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 229920000426 Microplastic Polymers 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000002274 desiccant Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000109 continuous material Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
- 238000012549 training Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/12—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B17/00—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement
- F26B17/12—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft
- F26B17/14—Machines or apparatus for drying materials in loose, plastic, or fluidised form, e.g. granules, staple fibres, with progressive movement with movement performed solely by gravity, i.e. the material moving through a substantially vertical drying enclosure, e.g. shaft the materials moving through a counter-current of gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
- F26B21/06—Controlling, e.g. regulating, parameters of gas supply
- F26B21/12—Velocity of flow; Quantity of flow, e.g. by varying fan speed, by modifying cross flow area
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/001—Handling, e.g. loading or unloading arrangements
- F26B25/002—Handling, e.g. loading or unloading arrangements for bulk goods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/02—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air
- F26B3/06—Drying solid materials or objects by processes involving the application of heat by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air the gas or vapour flowing through the materials or objects to be dried
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
- F26B2200/08—Granular materials
Definitions
- Drying system are connected and a dried, gaseous medium, in particular air, flowing through the drying container or containers is provided for drying the plastic material.
- One or more process heaters or air heaters are connected upstream of the drying container or containers.
- the return air exiting the respective drying container is fed back to the drying system via an individual return air line or a collecting line for several drying containers.
- Exhaust air stream or the return air exiting the drying container is dried in a drying cell containing a drying agent or adsorbent, if necessary the adsorbent is regenerated and fed to the bulk material as a dry air stream.
- a drying cell containing a drying agent or adsorbent
- Another method and a device for drying moist gases is known from DE 44 37 494 A1.
- the disadvantage of all known methods is that the drying performance required for the respective drying container can only be determined indirectly and with the aid of additional sensors, preferably temperature sensors. Necessary changes in the drying performance can only be determined with a delay, as temperature sensors naturally have a slow response behavior. The recognition of a trend of a temperature value also requires a longer observation period, which causes an additional delay in the control behavior. For the determination of the Drying performance uses the behavior of the temperature differential between pre-air to and return air from the material container.
- Production requirements e.g. if additional processing machines for the material supply are connected to the same drying container or if a processing machine comes to a standstill. Likewise, the loading of a drying container with cold or
- moisture-saturated plastic material suggest a higher drying performance, although the material throughput through the drying container can be unchanged. Sensitive plastic materials can suffer thermal damage if they overdry. If the drying process is too low, the moisture contained in the plasticized material flow causes it
- Drying devices In operation, it is assumed that the dwell time of the material is adhered to, since it is not possible to simply determine the actual dwell time. If more consumers are connected to a material container than originally intended and designed accordingly, the dwell time of the material will subsequently be undershot. Incorrect operation of a drying system can only be seen in incorrectly produced parts. It would therefore be advantageous to know the actual residence time of the material in the drying container.
- the object of the invention is to create a method for drying bulk material, in particular solids, such as granules, powder, grains, foils, snippets, or the like, preferably plastic granules, of the type mentioned above, with which the disadvantages described above are avoided on the one hand and on the other hand to keep or increase the material quality of the bulk material to be made available constant.
- the method according to the invention is characterized in that, depending on the material or bulk material used, the drying time specified by the filling plate or set by the user, in particular the dwell time (45), is transmitted either from a higher-level controller or from the consumer or in the control of the container or the drying device from Operator is set or is present in the control of the container or the drying device in the form of a local database, with the consumer the material consumption or the shot weight per production cycle or the individual or
- Cumulative shot weights for several production cycles or other values that indicate material consumption are transmitted to the drying device (s) and / or material container directly or indirectly via the higher-level controller, with each material container being made up of several on the control side
- Loading batches are preferably composed with time stamps and the drying or dwell time for the bottom loading batch, in particular material batch, in the material container is derived from the difference between the current time of the respective material removal by the consumer and the time stamp associated with the preferably oldest loading batch.
- the drying time for each batch of material required by the consumer can be precisely calculated and thus monitored. If the dwell time is too long, which is caused by a standstill of the consumer or consumers or due to the process being reduced
- Air volume of the drying device (s) on the basis of the transmission of at least the material consumption by the consumer to the drying device (s) or material container can be automatically adjusted. What is new is that too short a dwell time and thus possible under-drying of the material can be detected. This case arises when consumers call too much material from the drying container (s) and the dwell or drying time for the material specified by the material manufacturer can no longer be adhered to. If, due to the device and size, it is not possible to increase the amount of dry air or a higher loading of the material container, this is possible
- the residence time of the bulk material in the drying container can be calculated.
- the calculation of the dwell time is based on the first-in, first-out flow principle of bulk material in the drying container, as well as the
- a drying container is thus composed of several loading batches, which are provided with a time stamp and held in a ring buffer.
- the size of the ring buffer i.e. the number of line entries, corresponds approximately to this
- the “oldest” loading batch in the ring buffer is used to calculate the dwell time of the material.
- discontinuous operation as is the case with an injection molding machine, for example, the consumer reports the corresponding material consumption for each injection cycle using different physical variables.
- the dwell time of the lowest batch of material in the The material container that is used for the injection molding cycle results from the difference between the current time at the point in time at which the consumer is required and the time stamp of the oldest loading batch in the ring buffer.
- the consumer is notified either cyclically from time to time or when there is a change in material consumption.
- Such a method for drying bulk material is generally used in plastics processing technology, in particular for injection molding and extrusion technology, the information of the required bulk material being adapted accordingly, that is to say that in the
- Injection molding technology can take place after each injection molding cycle, whereas in extrusion technology the transmission takes place continuously at adjustable times.
- Drying performance or air flow can be selected. These strategies can be selected manually by predefined selection or automatically. Any combination of these strategies is also possible.
- Bulk material predetermined or determined residence time in the container or containers changed the process temperature to an adjustable or automatically determined value, preferably reduced. This ensures that if the material requirement is too low and the dwell time in the container is too long, the temperature for the bulk material or the plastic is reduced so that the plastic in the container is prevented from drying out. This can often occur if an error occurs during the process cycle with one or more loads, or if they were switched off or a production stop occurred. In the case of many overdried plastics, thermal degradation occurs, which leads to a defective plastic part, e.g. loss of strength, embrittlement, discoloration or cracking. In addition, additives or additives bound in the plastic can be released through overdrying, which get back into the drying device via the return air line and there the drying process by sticking and blocking of filters and desiccants can have a negative impact.
- Another strategy is to regulate the amount of air through the silo with the help of a flap that works like a proportional valve and is typically placed in the pre-air flow. Although this does not reduce the dwell time of the material in the drying container, it adjusts the amount of air that flows past the respective material and thus limits the ability of the material to absorb moisture. The excess air is released through a bypass valve
- Drying device returned. Since this air is not loaded with moisture, there is no energetic expense for dehumidifying in the drying device.
- the air volume can be influenced directly, thus reduced or increased and thus produce an effect similar to the flap.
- Another method directly influences the amount of bulk material in the storage of the container.
- the material consumption increases in the next or the next process cycle
- the volume in the memory is increased, whereas with
- the volume in the store is reduced in order to prevent the bulk material from staying too long in the store, ie that the loading volume of the container is constantly adapted to the required amount, whereas in the prior art it is ensured that it is always sufficient Bulk material is present and the loading volume is kept constant.
- drying device (s) and material container calculates the dwell time of the material or bulk material present in the container or containers from the transmitted material throughputs or shot weights per production cycle or cycles. This ensures that the drying device (s) and material container calculates the dwell time of the material or bulk material present in the container or containers from the transmitted material throughputs or shot weights per production cycle or cycles. This ensures that the drying device (s) and material container calculates the dwell time of the material or bulk material present in the container or containers from the transmitted material throughputs or shot weights per production cycle or cycles. This ensures that the
- the measures are advantageous in which both the consumer, preferably one or more injection molding machines, and the drying device (s) and material container function independently of one another and via
- the measures are advantageous in which the control or controls of the drying device (s) or the material container (s) keep the respective entries for the loading batches, at least the time stamps in the form of a ring buffer. This ensures that the control unit is activated at any time
- 1 to 5 show an industrial plant 1 for plastic applications, in which the individual production means 2 for producing one or more
- Plastic granulate or powder is fed to the processing machine 4 via a granulate conveyor 9 and possibly via a metering device 11 or from a granulate dryer 10. Via a temperature control device 13 and / or cooling device, the
- Injection mold 7 are kept at operating temperature by supplying a temperature control medium or are heated or cooled accordingly, so that an optimal processing of the plastic granulate or powder, which is used for
- the system can have a monitoring device 15, in particular a camera system, for automatic quality control of the generated Product 3 to be able to perform.
- a monitoring device 15 in particular a camera system
- upstream or downstream automation systems 16 are very often available, for example sprue cutting 17, centering, separating, feeding stations, box, pallet stacking stations, etc., which are integrated directly into the robot control or industrial system 1 and from there via digital or analog signals or other communication interfaces can be controlled.
- control electronics or control 19 as shown schematically, the setting or programming being entered and displayed via displays arranged on the devices or the teach box 18.
- programming or setting can also take place via an external component which is connected to the production means 2 via an interface.
- Production means 2 of this type are also preferably combined into one or more work cells 20, with the production means 2 within the work cells 20 being able to communicate directly with the machine 4 or via a work cell control 21.
- the industrial plant can have one or more control rooms 23 in which, in particular, one or more operating units 24 or computers are arranged, with cell phones 25 and / or tablet 26 also being able to be used. So that the plastics-processing production means 2 are supplied with bulk material 12, the corresponding production means 2 can be supplied via a central conveyor system 27, as shown for example in FIG.
- FIG. 3 shows a detail of the structure of a drying system 29 to illustrate the method for drying bulk material 12, in particular solids such as granules, powder, grains, foils, snippets, or the like, preferably plastic granules in a single or multiple a group of interconnected drying devices 30 and containers 10, 31, in particular material containers 10, 31.
- solids such as granules, powder, grains, foils, snippets, or the like
- the drying devices 30 can remove the moist air 34 from the air return line 33 and via a pump / compressor 37 to a
- Material consumption or the shot weight per production cycle or the individual or cumulative shot weights for several production cycles are transmitted to the drying device (s) 30 and material container 10, 31, which are further processed by their controller 19, that is to say that the required material consumption 43 is determined or, respectively, from all transmitted data is calculated so that a corresponding control or regulation for increasing or decreasing the required dry bulk material 12 is carried out.
- the container 10, 31 and / or the drying device 30 can determine or calculate a dwell time 45 of the bulk material 12 present in the memory 36 of the container 10, 31 in order to avoid a storage time 46 that is too short or unnecessarily long for optimal plasticizing and
- Drying device 30 is set by the operator or is present in the controller 19 of the container 10, 31 or the drying device 30 in the form of a local database.
- the most diverse control and regulation methods can be used, in which the top priority is always to provide the plastic processing equipment with a constant bulk material quality. It is possible that in different containers 10, 31, in particular in their reservoir 36, different materials 12 or bulk material 12 is processed, in particular dried, their parameters, in particular the
- Process temperature 40 can be set for each container 10, 31, i.e. the individual containers 10, 31, which are supplied with different bulk goods 12
- Drying devices 30 and / or material containers 10, 31 are transmitted.
- the drying device (s) 30 and / or material container 10, 31 can calculate the dwell time 45 of the material or bulk material 12 present in the container or containers 10, 31 from the transmitted material throughputs or shot weights per production cycle or cycles.
- the ring buffer 49 is used on the control side to store and manage the time stamps 50, in particular the time stamps 50a to c of the most varied of loading batches 48a to c, and possibly further information, e.g. Size of the loading charge 48a to c, the effective drying time 51a, 51b, 51c of a loading charge 48a to c or
- Dwell time 45 of the material is used.
- the consumer reports the in each injection cycle via different physical variables
- the dwell time 45a of the bottom material charge 48a in each case in the material container 10, 31, which is used for the injection molding cycle, results from the difference between the current time at the point in time at which the consumer 2 is required and the time stamp 50a of the oldest charge charge in the ring buffer 49.
- the material consumption is preferably continuous and
- the air supply for a wide variety of loading batches 48, 48a to 48c can be controlled or regulated, that is to say that several inflow points 54 on the container 10, 31, in particular on the reservoir 36, for the supply of the dried air 34 are arranged so that the required air 34 is fed in for each calculated dwell time 45, 45 a to c of the various loading batches 48, 48 a to c.
- This makes it possible, for example, to reduce the air supply for the oldest, that is to say the lowest, loading charge 48a and to increase it for the next or next loading charge 48b, 48c.
- drying device (s) 30 if the predetermined or determined dwell time is not reached or exceeded
- 45, 45a, 45b, 45c of the material or bulk material 12 different strategies for the drying of the material 12 in the container or containers 10, 31 by predetermined Selection or automatic selection.
- the material or bulk material 12 different strategies for the drying of the material 12 in the container or containers 10, 31 by predetermined Selection or automatic selection.
- predetermined or determined dwell time 45 automatically change the volume of air 42 through the container or containers 10, 31.
- other drying strategies known from the prior art are also possible. It is also possible that if the dwell time 45 specified or determined for the respective material 12 is not reached, an error can be output after an adjustable or fixed time period.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Drying Of Solid Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT505242019 | 2019-06-12 | ||
PCT/AT2020/060233 WO2020247992A1 (de) | 2019-06-12 | 2020-06-08 | Verfahren zur trocknung von schüttgut, insbesondere feststoffen, wie granulate, pulver, körner, folien, schnipsel, o. dgl., vorzugsweise kunststoffgranulat |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3983739A1 true EP3983739A1 (de) | 2022-04-20 |
EP3983739B1 EP3983739B1 (de) | 2023-12-27 |
EP3983739C0 EP3983739C0 (de) | 2023-12-27 |
Family
ID=71527513
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20737332.5A Active EP3983739B1 (de) | 2019-06-12 | 2020-06-08 | Verfahren zur trocknung von schüttgut |
Country Status (3)
Country | Link |
---|---|
US (1) | US20220341662A1 (de) |
EP (1) | EP3983739B1 (de) |
WO (1) | WO2020247992A1 (de) |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3625013C2 (de) | 1986-07-24 | 1995-05-24 | Somos Gmbh | Verfahren und Vorrichtung zum Trocknen von Schüttgut vorzugsweise aus Kunststoffgranulat |
DE4437494A1 (de) | 1994-10-20 | 1996-04-25 | Graeff Roderich Wilhelm | Verfahren und Vorrichtung zum Trocknen feuchten Gases |
DE19757537A1 (de) | 1997-12-23 | 1999-07-08 | Wittmann Kunststoffgeraete Gmb | Verfahren und Vorrichtung zum Trocknen und Erhitzen von Luft zum Trocknen von Feststoffen |
US7343700B2 (en) * | 2005-01-28 | 2008-03-18 | Mann & Hummel Protec Gmbh | Automatic control of the drying of particulate material |
AT505391B1 (de) | 2007-10-02 | 2009-01-15 | Wittmann Kunststoffgeraete Gmb | Verfahren und einrichtung zum trocknen von schüttgut |
AT509475B1 (de) | 2010-03-03 | 2012-01-15 | Wittmann Kunststoffgeraete | Verfahren zum trocknen von schüttgut |
AT508754B1 (de) | 2010-03-03 | 2011-04-15 | Wittmann Kunststoffgeraete | Einrichtung zum trocknen von schüttgut |
JP2012063072A (ja) * | 2010-09-16 | 2012-03-29 | Matsui Mfg Co | 粉粒体材料の乾燥装置、及び粉粒体材料の乾燥方法 |
US8959794B2 (en) * | 2011-10-18 | 2015-02-24 | Roderich W. Graeff | Process and apparatus to control the airflow in dehumidifying dryers |
DE102014118742A1 (de) * | 2014-12-16 | 2016-06-16 | Phoenix Contact Gmbh & Co. Kg | Verfahren und Trocknungsanlage zum Trocknen von Kunststoffgranulat |
EP3258198A1 (de) * | 2016-06-15 | 2017-12-20 | Gerresheimer Regensburg GmbH | Steuerung und computerprogrammprodukt für eine anlage zum entfeuchten von schüttgut |
EP3258197B1 (de) * | 2016-06-15 | 2020-04-15 | Gerresheimer Regensburg GmbH | Anordnung zum entfeuchten von granulatförmigem schüttgut und verfahren hierfür |
-
2020
- 2020-06-08 EP EP20737332.5A patent/EP3983739B1/de active Active
- 2020-06-08 WO PCT/AT2020/060233 patent/WO2020247992A1/de active Search and Examination
- 2020-06-08 US US17/616,746 patent/US20220341662A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
WO2020247992A1 (de) | 2020-12-17 |
EP3983739B1 (de) | 2023-12-27 |
US20220341662A1 (en) | 2022-10-27 |
EP3983739C0 (de) | 2023-12-27 |
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