WO2019040227A2 - Upwardly illuminated inspection station for detecting anomalies in water-borne products - Google Patents

Upwardly illuminated inspection station for detecting anomalies in water-borne products Download PDF

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Publication number
WO2019040227A2
WO2019040227A2 PCT/US2018/043868 US2018043868W WO2019040227A2 WO 2019040227 A2 WO2019040227 A2 WO 2019040227A2 US 2018043868 W US2018043868 W US 2018043868W WO 2019040227 A2 WO2019040227 A2 WO 2019040227A2
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WO
WIPO (PCT)
Prior art keywords
trough
water
products
inspection station
shrimp
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.)
Ceased
Application number
PCT/US2018/043868
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French (fr)
Other versions
WO2019040227A3 (en
Inventor
Byron M. Falgout
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Laitram LLC
Original Assignee
Laitram LLC
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 Laitram LLC filed Critical Laitram LLC
Priority to EP18849327.4A priority Critical patent/EP3672414A4/en
Priority to CN201880052581.XA priority patent/CN111050562B/en
Publication of WO2019040227A2 publication Critical patent/WO2019040227A2/en
Publication of WO2019040227A3 publication Critical patent/WO2019040227A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
    • A22C—PROCESSING MEAT, POULTRY, OR FISH
    • A22C29/00—Processing shellfish or bivalves, e.g. oysters, lobsters; Devices therefor, e.g. claw locks, claw crushers, grading devices; Processing lines
    • A22C29/02—Processing shrimps, lobsters or the like ; Methods or machines for the shelling of shellfish
    • A22C29/023—Conveying, feeding or aligning shellfish
    • A—HUMAN NECESSITIES
    • A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
    • A22C—PROCESSING MEAT, POULTRY, OR FISH
    • A22C29/00—Processing shellfish or bivalves, e.g. oysters, lobsters; Devices therefor, e.g. claw locks, claw crushers, grading devices; Processing lines
    • A22C29/005—Grading or classifying shellfish or bivalves
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
    • A23B2/00—Preservation of foods or foodstuffs, in general
    • A23B2/001—Details of apparatus, e.g. pressure feed valves or for transport, or loading or unloading manipulation
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23B—PRESERVATION OF FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES; CHEMICAL RIPENING OF FRUIT OR VEGETABLES
    • A23B4/00—Preservation of meat, sausages, fish or fish products
    • A23B4/26—Apparatus for preserving using liquids ; Processes therefor
    • A—HUMAN NECESSITIES
    • A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
    • A22C—PROCESSING MEAT, POULTRY, OR FISH
    • A22C29/00—Processing shellfish or bivalves, e.g. oysters, lobsters; Devices therefor, e.g. claw locks, claw crushers, grading devices; Processing lines
    • A22C29/02—Processing shrimps, lobsters or the like ; Methods or machines for the shelling of shellfish
    • A22C29/021—Cleaning operations on shellfish, e.g. evisceration, brushing
    • A22C29/022—Deveining shellfish
    • A—HUMAN NECESSITIES
    • A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
    • A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
    • A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs

Definitions

  • the invention relates generally to apparatus and methods for inspecting products for anomalies.
  • it relates to the visual inspection of illuminated products, such as shrimp, carried in a flow of water.
  • One version of an inspection station embodying features of the invention comprises a trough channeling a flow of water carrying products along the length of the trough between side walls and a light source upwardly illuminating the products through the bottom of the trough and the water to make anomalies in the products detectable by visual inspection.
  • an inspection station especially for inspecting shrimp comprises a trough channeling a flow of water carrying raw deveined shrimp along the length of the trough between sidewalls and a light source upwardly illuminating the shrimp through the bottom of the trough and the water to make residual veins detectable by visual inspection.
  • a method of inspecting products for anomalies and embodying features of the invention comprises: (a) flowing products in a flow of water along the length of a trough; (b) illuminating the products through the water from below; (c) visually inspecting the illuminated products flowing along the trough for anomalies; and (d) culling products with anomalies from the trough.
  • FIG. 1 is an isometric view of an inspection station embodying features of the invention.
  • FIG. 2 is a side elevation view of the inspection station of FIG. 1.
  • FIG. 3 is an axonometric view of a portion of the inspection station of FIG. 1 used to inspect shrimp for residual vein.
  • FIG. 4 is a block diagram of the inspection station of FIG. 1 used in a shrimp- deveining process.
  • FIGS. 1 and 2 depict an inspection station embodying features of the invention.
  • the inspection station 10 comprises a trough 12 supported in a frame 14.
  • the trough 12 has a bottom 16 and a pair of opposite side walls 18, 19 that extend in length from a trough entrance 20 to an exit 22.
  • the trough 12 channels a flow of water carrying products in a flow direction 24 from the entrance 20 to the exit 22.
  • the bottom 16 of the trough 12 is formed by a transparent or translucent sheet sitting atop a light table 26.
  • the light table 26 serves as a light source directing diffuse light upward through the bottom sheet 16 and into the trough 12. The diffuse light uniformly illuminates the products flowing along the length of the trough 12.
  • the light table 26 may be a single table or a series of light-table sections as needed to iUuminate the trough 12 along its length and width.
  • a feed 28 introduces products in a flow of water into the trough 12 at the entrance
  • the feed 28 includes a water source 30 and a feed tank 32.
  • the water source 30 includes a manifold 34 with outlets 36 injecting water into the tank 32.
  • the tank 32 has an open top 38 and a divider 40 that extends downward into the tank.
  • the divider 40 separates the tank 32 into an input portion 42 and an output portion 43.
  • the two portions 42, 43 are in fluid communication below the lower end of the divider 40.
  • Products are dumped into the input portion 42 of the tank 32 through the open top 38.
  • a shield 44 at the upper end of the divider 40 prevents products from being dumped into the output portion 43 of the tank 32 or the trough 12.
  • the divider 40 which is angled parallel to the trough-side wall 46 of the tank 32, shapes the input portion 43 as a narrow channel.
  • the product-laden water is pushed downward in the input portion 42 by the water injected by the outlets 36, around the lower end of the divider 40, and upward through the narrow output portion 43, as indicated by arrow 47 in FIG. 2.
  • the product-laden water flows from the output portion 43 of the tank 32 into the trough 12 at its entrance 20.
  • the water source 30 is adjusted to flow the water along the trough 12 in the flow direction 24 at a pace slow enough for a thorough inspection.
  • the upwardly directed light from the light table 26 iUuminates the products through the water flow and improves the detectability of anomalies in the products, such as residual shell, skin, or other unwanted appendages or organs, product discoloration, and foreign-matter contaminants.
  • the inspectors cull anomalous products from the flow and deposit them in collectors 48 on the outer side of each side wall 18, 19. The inspectors also remove anomalous contaminants and deposit them in the collectors 48 or discard them separately.
  • the collectors 48 shown are flumes supplied with water through pipes 50, 51 connected to the manifold 34.
  • the water carries the culled products along the collectors 48 and out open ends 52 downstream into collection receptacles 54 (FIG. 2), such as baskets with bottom openings to let the water drain through to supporting gutters 56.
  • collection receptacles 54 such as baskets with bottom openings to let the water drain through to supporting gutters 56.
  • the cull in the basket 54 can then be discarded, reprocessed, or used for a different purpose.
  • the gutters 56 channel drain water collected from the flumes 48 to a reservoir 57, which also stores water that exits the trough 12.
  • a dewatering surface 58 with openings, such as a conveyor belt with open area or a slotted flat conveyor chute for drainage.
  • the water drains through to a slide 60, as indicated by arrows 62.
  • the slide 60 guides water into the reservoir 57.
  • the water collected in the reservoir 57 from the slide 60 and the gutters 56 is recirculated back to the manifold 34.
  • a pump 64 pumps water from the reservoir 57 through hosing 66.
  • An optional water filter 68 may be interposed between the reservoir 57 and the manifold 34.
  • Valves 70 throughout the water system are used to adjust the flow of water to the trough 12 and the flumes 48.
  • a drain 71 with valve at the bottom of the tank 32 is used to empty the tank when off-line.
  • FIGS. 3 and 4 illustrate the operation of the inspection station to inspect raw headless, shell-off, deveined shrimp for residual veins.
  • the visibility of residual veins 72 in shrimp 74 is enhanced by the upwardly directed light from the light table.
  • the water flow also tends to cause the lightweight veins 72 to trail out from the shrimp bodies 74, which further aids visibility.
  • Obstructions 76 may be inserted in the trough 12 at spaced apart positions along its length to disrupt the flow of water, which causes the shrimp to tumble as they contact or pass by the obstructions.
  • the tumbling causes the shrimp bodies 74 to reposition themselves so that veins 72 hidden by the shrimp bodies might be revealed. Because the buoyancy of the shrimp bodies 74 is close to that of the water, they ride throughout the depth of the water column of the flow, neither all sinking to the bottom nor all floating to the surface.
  • FIGS. 1-3 The inspection system of FIGS. 1-3 is shown as part of a shrimp-deveining process in FIG. 4.
  • Raw, peeled shrimp 78 are fed into a deveiner 80, such as a tumble-drum deveiner, to remove the veins.
  • the raw deveined shrimp 82 are then fed into the trough 12 as described with respect to FIGS. 1 and 2.
  • the shrimp are flowed in a flow of water along the length of the trough 12 while being illuminated through the water by the light table below.
  • Inspectors visually inspect the illuminated shrimp flowing along the trough 12 for residual veins.
  • the inspectors cull shrimp with residual veins from the trough and deposit them in the collectors 48, which deliver them to the collection receptacles 54.
  • the culled shrimp with residual veins collected in the receptacles 54 are returned to the deveiner 80 for reprocessing.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Food Science & Technology (AREA)
  • Chemical & Material Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

La présente invention concerne un poste d'inspection et un procédé d'inspection de produits en vue de déceler des anomalies. Le poste d'inspection comprend un bac et une source de lumière. Le bac fait circuler un écoulement d'eau chargé de produit le long de sa longueur. La source de lumière éclaire le produit à travers l'eau par le bas, rendant ainsi les anomalies de produit détectables par inspection visuelle. De cette manière, des produits présentant des anomalies, telles que des crevettes ayant des veines résiduelles, peuvent être éliminés et subir un retraitement.The present invention relates to an inspection station and a product inspection method for detecting anomalies. The inspection station includes a ferry and a light source. The tray circulates a product-laden flow of water along its length. The light source illuminates the product through the water from below, thus making the product abnormalities detectable by visual inspection. In this way, products with abnormalities, such as shrimp with residual veins, can be removed and reprocessed.

Description

UPWARDLY ILLUMINATED INSPECTION STATION FOR DETECTING
ANOMALIES IN WATER-BORNE PRODUCTS
BACKGROUND
The invention relates generally to apparatus and methods for inspecting products for anomalies. In particular, it relates to the visual inspection of illuminated products, such as shrimp, carried in a flow of water.
Many conveyor lines include inspection stations at which quality-control inspectors visually inspect passing products for unacceptable anomalies and remove or divert the unacceptable products. In the processing of shrimp, for instance, raw peeled and headless shrimp pass through a deveiner, which removes the veins to produce raw deveined shrimp. But occasionally some shrimp exit the deveiner with residual vein. And because the residual vein is thin and can be hidden by the shrimp body, it is often difficult for an inspector to detect.
SUMMARY
One version of an inspection station embodying features of the invention comprises a trough channeling a flow of water carrying products along the length of the trough between side walls and a light source upwardly illuminating the products through the bottom of the trough and the water to make anomalies in the products detectable by visual inspection.
Another version of an inspection station especially for inspecting shrimp comprises a trough channeling a flow of water carrying raw deveined shrimp along the length of the trough between sidewalls and a light source upwardly illuminating the shrimp through the bottom of the trough and the water to make residual veins detectable by visual inspection.
In another aspect, a method of inspecting products for anomalies and embodying features of the invention comprises: (a) flowing products in a flow of water along the length of a trough; (b) illuminating the products through the water from below; (c) visually inspecting the illuminated products flowing along the trough for anomalies; and (d) culling products with anomalies from the trough. BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is an isometric view of an inspection station embodying features of the invention.
FIG. 2 is a side elevation view of the inspection station of FIG. 1.
FIG. 3 is an axonometric view of a portion of the inspection station of FIG. 1 used to inspect shrimp for residual vein.
FIG. 4 is a block diagram of the inspection station of FIG. 1 used in a shrimp- deveining process.
DETAILED DESCRIPTION FIGS. 1 and 2 depict an inspection station embodying features of the invention. The inspection station 10 comprises a trough 12 supported in a frame 14. The trough 12 has a bottom 16 and a pair of opposite side walls 18, 19 that extend in length from a trough entrance 20 to an exit 22. The trough 12 channels a flow of water carrying products in a flow direction 24 from the entrance 20 to the exit 22. The bottom 16 of the trough 12 is formed by a transparent or translucent sheet sitting atop a light table 26. The light table 26 serves as a light source directing diffuse light upward through the bottom sheet 16 and into the trough 12. The diffuse light uniformly illuminates the products flowing along the length of the trough 12. The light table 26 may be a single table or a series of light-table sections as needed to iUuminate the trough 12 along its length and width.
A feed 28 introduces products in a flow of water into the trough 12 at the entrance
20. The feed 28 includes a water source 30 and a feed tank 32. The water source 30 includes a manifold 34 with outlets 36 injecting water into the tank 32. The tank 32 has an open top 38 and a divider 40 that extends downward into the tank. The divider 40 separates the tank 32 into an input portion 42 and an output portion 43. The two portions 42, 43 are in fluid communication below the lower end of the divider 40. Products are dumped into the input portion 42 of the tank 32 through the open top 38. A shield 44 at the upper end of the divider 40 prevents products from being dumped into the output portion 43 of the tank 32 or the trough 12. The divider 40, which is angled parallel to the trough-side wall 46 of the tank 32, shapes the input portion 43 as a narrow channel. The product-laden water is pushed downward in the input portion 42 by the water injected by the outlets 36, around the lower end of the divider 40, and upward through the narrow output portion 43, as indicated by arrow 47 in FIG. 2. The product-laden water flows from the output portion 43 of the tank 32 into the trough 12 at its entrance 20.
The water source 30 is adjusted to flow the water along the trough 12 in the flow direction 24 at a pace slow enough for a thorough inspection. The upwardly directed light from the light table 26 iUuminates the products through the water flow and improves the detectability of anomalies in the products, such as residual shell, skin, or other unwanted appendages or organs, product discoloration, and foreign-matter contaminants. The inspectors cull anomalous products from the flow and deposit them in collectors 48 on the outer side of each side wall 18, 19. The inspectors also remove anomalous contaminants and deposit them in the collectors 48 or discard them separately. The collectors 48 shown are flumes supplied with water through pipes 50, 51 connected to the manifold 34. The water carries the culled products along the collectors 48 and out open ends 52 downstream into collection receptacles 54 (FIG. 2), such as baskets with bottom openings to let the water drain through to supporting gutters 56. The cull in the basket 54 can then be discarded, reprocessed, or used for a different purpose. The gutters 56 channel drain water collected from the flumes 48 to a reservoir 57, which also stores water that exits the trough 12.
The water-borne products exit the trough 12 onto a dewatering surface 58 with openings, such as a conveyor belt with open area or a slotted flat conveyor chute for drainage. As the products advance away from the trough 12 on the dewatering surface 58, the water drains through to a slide 60, as indicated by arrows 62. The slide 60 guides water into the reservoir 57. The water collected in the reservoir 57 from the slide 60 and the gutters 56 is recirculated back to the manifold 34. A pump 64 pumps water from the reservoir 57 through hosing 66. An optional water filter 68 may be interposed between the reservoir 57 and the manifold 34. Valves 70 throughout the water system are used to adjust the flow of water to the trough 12 and the flumes 48. A drain 71 with valve at the bottom of the tank 32 is used to empty the tank when off-line.
FIGS. 3 and 4 illustrate the operation of the inspection station to inspect raw headless, shell-off, deveined shrimp for residual veins. As the water flows slowly through the trough 12 in the flow direction 24, the visibility of residual veins 72 in shrimp 74 is enhanced by the upwardly directed light from the light table. The water flow also tends to cause the lightweight veins 72 to trail out from the shrimp bodies 74, which further aids visibility. Obstructions 76 may be inserted in the trough 12 at spaced apart positions along its length to disrupt the flow of water, which causes the shrimp to tumble as they contact or pass by the obstructions. The tumbling causes the shrimp bodies 74 to reposition themselves so that veins 72 hidden by the shrimp bodies might be revealed. Because the buoyancy of the shrimp bodies 74 is close to that of the water, they ride throughout the depth of the water column of the flow, neither all sinking to the bottom nor all floating to the surface.
The inspection system of FIGS. 1-3 is shown as part of a shrimp-deveining process in FIG. 4. Raw, peeled shrimp 78 are fed into a deveiner 80, such as a tumble-drum deveiner, to remove the veins. The raw deveined shrimp 82 are then fed into the trough 12 as described with respect to FIGS. 1 and 2. The shrimp are flowed in a flow of water along the length of the trough 12 while being illuminated through the water by the light table below. Inspectors visually inspect the illuminated shrimp flowing along the trough 12 for residual veins. The inspectors cull shrimp with residual veins from the trough and deposit them in the collectors 48, which deliver them to the collection receptacles 54. The culled shrimp with residual veins collected in the receptacles 54 are returned to the deveiner 80 for reprocessing.
Although the invention has been described in detail with respect to the deveining of shrimp, it applies to other products as well. Some examples of other products and their anomalies whose detection can be enhanced are: (1) oyster or other mussel meats for residual shell, foreign matter, or discoloration; (2) crawfish tail meats or crab meat for residual shell, foreign matter, or discoloration; and (3) vegetables, such as peas, beans, and corn, for foreign matter or discoloration.

Claims

WHAT IS CLAIMED IS:
1. An inspection station comprising:
a trough having a bottom and a pair of side walls extending in length from an entrance to an exit and channeling a flow of water carrying products along the length of the trough;
a light source along the bottom of the trough upwardly illuminating the products
through the water to make anomalies in the products detectable by visual inspection.
2. An inspection station as in claim 1 comprising a feed introducing the products in the flow of water into the trough through the entrance.
3. An inspection station as in claim 1 further comprising a collector along at least one of the side walls outside the trough for collecting products with anomalies culled from the trough.
4. An inspection station as in claim 1 further comprising at least one obstruction extending transversely across the flow of water between the pair of side walls to disrupt the flow of water and cause products to tumble as they contact or pass the obstruction.
5. An inspection station as in claim 1 comprising a dewatering surface at the exit of the trough receiving the products exiting the trough and having openings that allow water to drain through the dewatering surface.
6. An inspection station as in claim 5 wherein the dewatering surface is provided on a conveyor belt or a flat conveyor chute.
7. An inspection station as in claim 5 comprising a feed introducing the products in the flow of water into the trough through the entrance, a reservoir collecting the water draining through the dewatering surface, and a pump directing the water from the reservoir to the feed.
8. An inspection station as in claim 7 further comprising a filter between the pump and the feed to filter the water before it returns to the feed.
9. An inspection station as in claim 1 wherein the light source comprises a light table
providing diffuse light upward through the bottom of the trough.
10. An inspection station as in claim 9 wherein the light table comprises a series of light- table sections.
11. An inspection station as in claim 9 comprising a transparent or translucent sheet atop the light table along the bottom of the trough.
12. An inspection station comprising:
a trough having a bottom and a pair of side walls extending in length from an entrance to an exit and channeling a flow of water carrying raw deveined shrimp along the length of the trough;
a light source along the bottom of the trough upwardly illuminating the shrimp through the water to make residual veins detectable by visual inspection.
13. An inspection station as in claim 12 comprising a feed introducing the raw deveined shrimp in the flow of water into the trough through the entrance, wherein the feed includes:
a water source;
a tank including:
an open top;
a divider extending downward from the open top to a lower end and separating the tank into an input portion into which the water source injects water and the raw deveined shrimp are introduced and an output portion in fluid communication with the input portion below the lower end of the divider to form a shrimp-laden flow of water to the trough through the entrance.
14. An inspection station as in claim 12 further comprising a collector along at least one of the side walls outside the trough for collecting shrimp with residual veins culled from the trough to be deveined again.
15. An inspection station as in claim 14 further comprising a collection receptacle and
wherein the collector is a flume conveying the shrimp with residual veins to the collection receptacle to be deveined again.
16. A method of inspecting products for anomalies comprising:
flowing products in a flow of water along the length of a trough;
illuminating the products through the water from below;
visually inspecting the illuminated products flowing along the trough for anomalies; culling products with anomalies from the trough.
17. The method of claim 16 further comprising disrupting the flow of water along the trough to tumble the products in the flow.
18. The method of claim 16 wherein the products are shrimp and the anomalies are residual vein.
19. The method of claim 18 further comprising collecting the shrimp culled from the trough and deveining those shrimp again.
PCT/US2018/043868 2017-08-25 2018-07-26 Upwardly illuminated inspection station for detecting anomalies in water-borne products Ceased WO2019040227A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP18849327.4A EP3672414A4 (en) 2017-08-25 2018-07-26 Upwardly illuminated inspection station for detecting anomalies in water-borne products
CN201880052581.XA CN111050562B (en) 2017-08-25 2018-07-26 Inspection station for detecting abnormal upward irradiation in water-borne products

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US15/686,430 US10440967B2 (en) 2017-08-25 2017-08-25 Upwardly illuminated inspection station for detecting anomalies in water-borne products
US15/686,430 2017-08-25

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EP (1) EP3672414A4 (en)
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Publication number Publication date
CN111050562B (en) 2022-05-03
CN111050562A (en) 2020-04-21
WO2019040227A3 (en) 2019-05-02
US10440967B2 (en) 2019-10-15
EP3672414A4 (en) 2021-06-02
US20190059404A1 (en) 2019-02-28
EP3672414A2 (en) 2020-07-01

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