Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D51/00—Making hollow objects
  • B21D51/16—Making hollow objects characterised by the use of the objects
  • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
  • B21D45/02—Ejecting devices
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
  • B21D22/20—Deep-drawing
  • B21D22/28—Deep-drawing of cylindrical articles using consecutive dies
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D51/00—Making hollow objects
  • B21D51/16—Making hollow objects characterised by the use of the objects
  • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
  • B21D51/2615—Edge treatment of cans or tins
  • B21D51/2638—Necking

Definitions

• the present invention relates generally to the field of forming or processing an article, such as a container. More specifically, the invention relates to an apparatus for handling and processing a metal container, such as an aluminum beverage container or a preform thereof.
• Conventional ram systems have traditionally been used in machinery for processing containers, such as extruded steel or aluminum beverage containers or preforms thereof.
• such conventional ram systems are used in machinery for various steps in processes for producing aluminum beverage containers from aluminum container preforms, and even in steps for handling the aluminum beverage containers thereafter.
• reference herein to a container can interchangeably refer to a container or a preform used in the process of producing the container.
• Such conventional container processing machinery with conventional ram systems can be used at maximum output speeds of about 3600 containers per minute with containers of a certain size, generally referred to herein as “small containers.”
• small containers are generally known in the industry as 211 diameter containers, which have a diameter of about 66 millimeters (mm) and a height of less than about 190 mm.
• Such small containers allow for smaller physical dimensions in the conventional ram systems, but also smaller operational dimensions in the conventional ram systems.
• the stroke length of ram systems for use with small containers is about 35 centimeters (cm) to about 44 cm.
• FIG. 1 is a perspective view of a conventional ram system 100.
• the ram system 100 includes a knock-out ram assembly 102 and a push ram assembly 104.
• the knock-out ram assembly 102 includes a bushing 106 surrounding a knock-out ram 108. Attached to the knockout ram 108 facing the push ram assembly 104 is a knock-out 110.
• the knock-out ram 108 translates relative to the bushing 106 in a direction parallel to the line 111, which allows the knock-out ram assembly 102 to retain and release a container (not shown) within the ram system 100.
• the additional elements necessary for the operation of the knock-out ram assembly 102, along with a general description of the operation thereof, is known to those skilled in the art and is not discussed herein as a matter of convenience.
• the push ram assembly 104 includes a bushing 112 surrounding a push ram 114. Attached to the push ram 114 facing the knock-out ram assembly 102 is a push plate 116.
• the push plate 116 can be made out of metal, such as tool steel, and weigh about 0.12 kg to about 0.18 kg.
• the push ram 114 translates relative to the bushing 112 in a direction parallel to the line 111, which allows the push ram assembly 104 to retain and release a container (not shown) within the ram system 100 in combination with the knock-out ram assembly 102.
• the additional elements necessary for the operation of the push ram assembly 104, along with a general description of the operation thereof, is known to those skilled in the art and is not discussed herein as a matter of convenience.
• FIG. 2 is a partial cross-sectional side view of the ram system 100 of FIG. 1
• FIG. 3 is a partial cross-sectional perspective view of the ram system 100 of FIG. 1.
• the line 118 represents the outer diameter of the knock-out ram 108 where it extends through the bushing 106.
• the outer diameter is substantially the same as the inner diameter of the bushing 106, except for a minimal difference that allows the knock-out ram 108 to translate within the bushing 106.
• the outer diameter of the knock-out ram 108 can be about 47 mm to about 50 mm.
• the line 120 represents the smallest outer diameter of the bushing 106 through which the knock-out ram 108 extends.
• the outer diameter of the bushing 106 can be about 70 mm.
• the push ram 114 extends through the bushing 112, as described above.
• the push plate 116 is connected to the push ram 114 so that it faces the knock-out ram assembly 102.
• the push ram 114 includes a recess 126 that is sized to accommodate the push plate 116 and a retainer 128 that fastens the push plate 116 to the push ram 114.
• the line 122 represents the outer diameter of the push ram 114 where it extends through the bushing 112. The outer diameter is substantially the same as the inner diameter of the bushing 112, except for a minimal difference that allows the push ram 114 to translate within the bushing 112.
• the outer diameter of the push ram 114 can be about 50 mm.
• the line 124 represents the smallest outer diameter of the bushing 112 through which the push ram 114 extends.
• the outer diameter of the busing can be about 70 mm.
• the knock-out 110 is coupled to the knock-out ram 108.
• a die 200 used in the processing of containers (not shown) retained in the ram system 100.
• the knock-out 110 surrounds a knock-out retainer 202 connected to the knock-out ram 108.
• An inwardly facing threaded portion 214 of the knock-out retainer 202 engages a corresponding outwardly facing threaded portion 216 of the knock-out ram 108.
• the knock-out retainer 202 retains the knockout 110 on the knock-out ram 108.
• the knock-out ram assembly 102 can be configured to allow for large containers.
• the dimensions of the aforementioned die 200, knock-out 110, and knock-out retainer 202 can be increased to accommodate the larger dimensions of the large containers.
• the conventional ram system 100 shown in FIGS. 1-3 is configured to process large containers.
• the larger dimensions of the knock-out 110 and the knock-out retainer 202 adds additional weight. Because the knock-out 110 and the knock-out retainer 202 are moving during operation of the knock-out ram assembly 102, the knock-out ram assembly 102 as a whole experiences larger forces that reduce the ability to run container processing machinery that include the knock-out ram assembly 102 at speeds of about 2400 containers per minute. Instead, the container processing machinery that includes the knock- out ram assembly 102 must run at speeds of only about 1800 containers per minute. This reduction in processing speed has a large impact on the cost effectiveness of the container processing machinery using the knock-out ram assembly 102.
• a conduit 210 runs through the knockout ram 108 and leads to a conduit 212 that runs through the knock-out retainer 202.
• the combined conduits 210 and 212 provide for pressurization of the knock-out ram assembly 102 during use to retain a container (not shown). Pressure is generated for controlling and supporting containers within the knock-out ram 108.
• the pressurized area is the empty area of the knock-out ram assembly 102, which is generally defined by areas 204, 206, and 208 surrounding and between the die 200, the knock-out 110, and the knock-out retainer 202. More specifically, the area 204 is defined by the die 200 extending further beyond the knock-out 110.
• the area 206 is defined by a radial gap between the knock-out 110 and the knock-out retainer 202.
• the area 208 is defined by the knock-out 110 extending beyond the knock-out retainer 202.
• the increased dimensions of the die 200, the knock-out 110, and the knock-out retainer 202 result in increased dimensions of the areas 204, 206, and 208.
• the increased dimensions of the areas 204, 206, and 208 increases the pressurization requirements when processing large containers.
• the increased requirements contributes to the inability to run container processing machinery with the ram system 100 at speeds of about 2400 containers per minute. For example, there is not enough time to create the necessary pressure for the larger area defined by areas 204, 206, and 208. Instead, such container processing machinery must run at reduced speeds, such as about 1800 containers per minute. Again, this reduction in processing speeds has a large impact on the cost effectiveness of the container processing machinery using the conventional knock-out ram assembly 102.
• the conventional push ram assembly 104 suffers from similar limitations based on modifying the push ram assembly 104 to handle large containers. For example, the larger dimensions of conventional push ram assemblies 104 sized to accept large containers results in weights and weight distributions that prevent running the conventional push ram assemblies 104 at high processing speeds. [0015] Accordingly, needs exist for ram systems used in the processing of containers that do not suffer from the above limitations, while still accommodating large containers.
• One exemplary embodiment of the invention relates to a knock-out ram assembly that includes a bushing and a knock-out ram extending through the bushing.
• the knock-out ram is configured to translate relative to the bushing.
• the knock-out ram assembly further includes a die coupled to the bushing at one end of the knock-out ram assembly.
• a knock-out retainer assembly is coupled to the knock-out ram at the one end.
• the knock-out retainer assembly includes a retainer and a filler body.
• the knock-out ram assembly further includes a knock-out retained against the knock-out ram at the one end by the knock-out retainer assembly.
• An aspect of the assembly includes a retaining ring and a bias spring.
• the retaining ring and the bias spring maintain the filler body biased under tension on the retainer.
• Another aspect of the assembly includes the filler body forming an interference fit with the knock-out such that there is no radial gap between the filler body and the knock-out. [0019] Another aspect of the assembly includes the knock-out retainer assembly weighing about 0.37 kg to about 0.46 kg.
• Another aspect of the assembly includes proximal ends of the knock-out retainer assembly and the knock-out being generally flush.
• Another aspect of the assembly includes the retainer having a tapered nozzle.
• a further aspect is that a conduit passes through the knock-out ram and the knock-out retainer assembly for pressurizing an area defined by the die, knock-out retainer assembly, and the knock-out during use of the knock-out ram assembly.
• a further aspect includes the filler body having a taper that complements the tapered nozzle.
• Another aspect of the assembly includes the knock-out ram including an inwardly facing threaded portion, and the retainer including an outwardly facing threaded portion.
• the inwardly facing threaded portion engages the outwardly facing threaded portion to couple the knock-out retainer assembly to the knock-out ram.
• Another aspect of the assembly includes the knock-out having an annular groove facing the bushing.
• Another aspect of the assembly includes an outer diameter of the knock-out ram within the bushing being about 34 mm to about 42 mm. [0025] Another aspect of the assembly includes the filler body being formed of a polymer. [0026] Another aspect of the assembly includes the knock-out ram assembly being configured to process containers having a diameter of about 66 mm to about 87 mm, a height of about 88 mm to about 211 mm, or a combination thereof.
• the knock-out ram assembly includes a first bushing and a knock-out ram extending through the first bushing.
• the knock-out ram is configured to translate relative to the first bushing.
• the knock-out ram assembly further includes a die coupled to the first bushing at one end of the knock-out ram assembly.
• the knock-out ram assembly further includes a knock-out retainer assembly coupled to the knockout ram at the one end.
• the knock-out retainer assembly includes a retainer and a filler body.
• the knock-out ram assembly further includes a knock-out retained against the knock-out ram at the one end by the knock-out retainer assembly.
• the push ram assembly includes a second bushing and a push ram extending through second first bushing.
• the push ram is configured to translate relative to the second bushing.
• the push ram assembly further includes a push plate coupled to the push ram facing the knock-out ram assembly.
• the knock-out ram assembly and the push ram assembly are configured to cooperate together for retaining and releasing a container.
• An aspect of the system includes the push ram being hollow beyond where the push plate connects to the push ram.
• Another aspect of the system includes the ram system being configured to process containers having a diameter of about 66 mm to about 87 mm, a height of about 88 mm to about 211 mm, or a combination thereof, and the push ram weighs about 3.9 kg to about 4.8 kg-
• Another aspect of the system includes the push plate being a single piece.
• Another aspect of the system includes the filler body forming an interference fit with the knock-out such that there is no radial gap between the filler body and the knock-out. [0032] Another aspect of the system includes proximal ends of the knock-out retainer assembly and the knock-out being generally flush.
• Another aspect of the system includes the retainer having a tapered nozzle and the filler body having a taper that complements the tapered nozzle.
• FIG. 1 is a perspective view of a conventional ram system for processing metal containers.
• FIG. 2 is a partial cross-sectional side view of the conventional ram system of FIG.
• FIG. 3 is a partial cross-sectional perspective view of the conventional ram system of FIG. 1.
• FIG. 4 is a perspective view of a ram system for processing metal containers, according to an embodiment of the present invention.
• FIG. 5 is a partial cross-sectional side view of the ram system of FIG. 4, according to an embodiment of the present invention.
• FIG. 6 is a partial cross-sectional perspective view of the ram system of FIG. 4, according to an embodiment of the present invention.
• FIG. 7 is an exploded perspective view of the knock-out ram of the ram system of FIG. 4, according to an embodiment of the present invention.
• FIG. 8 is a perspective view of the knock-out of the ram system of FIG. 4, according to an embodiment of the present invention.
• FIG. 9 is an exploded perspective view of the knock-out retainer assembly of the ram system of FIG. 4, according to an embodiment of the present invention.
• FIG. 4 is a perspective view of a ram system 400 for use in processing metal containers, such a metal beverage cans, according to an embodiment of the present invention.
• the general operation of the ram system 400 is similar to the conventional ram system 100 described above.
• the ram system 400 includes a knock-out ram assembly 402 and a push ram assembly 404.
• the knock-out ram assembly 402 includes a bushing 406 surrounding a knockout ram 408. Attached to the knock-out ram 408 and configured to face the push ram assembly 404 is a knock-out 410.
• the knock-out ram 408 translates relative to the bushing 406 in a direction parallel to the line 411, which allows the knock-out ram assembly 402 to retain and release a container (not shown) within the ram system 400.
• the additional elements necessary for the operation of the knock-out ram assembly 402, along with a general description of the operation thereof, is known to those of ordinary skill in the art and is not discussed herein for convenience.
• the push ram assembly 404 includes a bushing 412 surrounding a push ram 414. Attached to the push ram 414 and configured to face the knock-out ram assembly 402 is a push plate 416.
• the push plate 416 can be made out of metal, such as tool steel, or a ceramic, and weigh about 0.3 kg. In one or more embodiments, the push plate 416 may be fixed, i.e., not adjustable like conventional push plates, to save additional weight.
• the push plate 416 is made from a single piece of, for example, metal or ceramic.
• the push ram 414 translates relative to the bushing 412 in a direction parallel to the line 411, which allows the push ram assembly 404 to retain and release a container (not shown) within the ram system 400.
• the additional elements necessary for the operation of the push ram assembly 404, along with a general description of the operation thereof, is known to those of ordinary skill in the art and is not discussed herein for convenience.
• FIGS. 5 and 6 are a partial cross-sectional side view of the ram system 400 of FIG. 4 and a partial cross-sectional perspective view of the ram system 400 of FIG. 4, respectively.
• the knock-out ram assembly 402 the knock-out ram 408 extends through the bushing 406, as described above.
• the knock-out 410 is connected to the knock-out ram 408 so that it faces the push ram assembly 404 during use of the ram system 400 in container processing machinery.
• the line 518 represents the outer diameter of the knock-out ram 408 through the bushing 406, which is substantially the same as the inner diameter of the bushing 406, except for a minimal difference that allows the knock-out ram 408 to translate within the bushing 406.
• the outer diameter of the knock-out ram 408 can be about 34 mm to about 42 mm, such as about 38 mm.
• the line 520 represents the smallest outer diameter of the bushing 406, such as about 70 mm.
• the push ram 414 extends through the bushing 412, as described above.
• the push plate 416 is connected to the push ram 414 so that it faces the knock-out ram assembly 402 during use of the ram system 400 in container processing machinery.
• the line 522 represents the outer diameter of the push ram 414 through the bushing 412, which is substantially the same as the inner diameter of the bushing 412, except for a minimal difference that allows the push ram 414 to translate within the bushing 412.
• the outer diameter of the push ram 414 can be about 45 mm to about 56 mm, such as about 50 mm.
• the line 524 represents the smallest outer diameter of the bushing 412.
• the outer diameter of the bushing 412 can be about 70 mm.
• a die 500 used for processing containers (not shown) retained in the ram system 400 surrounding the knock-out 410 is a die 500 used for processing containers (not shown) retained in the ram system 400.
• the die 500 can be the same die 200 as described above within the conventional ram system 100.
• the shape, the materials, etc. can be the same as the conventional die 200.
• a knock-out retainer assembly 502 is connected to the knock-out ram 408 via a threaded portion 516 on the knock-out ram 408 that engages a threaded portion on the knockout retainer assembly 502 (FIG. 9).
• the knock-out retainer assembly 502 is surrounded by the knock-out 410.
• the knock-out retainer assembly 502 extends generally the same distance into the die 500 as the knock-out 410.
• the proximal ends 502a and 410a of the knock-out retainer assembly 502 and knock-out 410 are generally flush.
• knockout ram assembly 402 there is no equivalent space, or a minimal equivalent space, in the knockout ram assembly 402 as the area 206 in the conventional knock-out ram assembly 102. Further, unlike the conventional ram system 100, there is no equivalent space in the knock-out ram assembly 402 as the area 208 in the knock-out ram assembly 102 because the knock-out retainer assembly 502 generally forms an interference fit with the knock-out 410 along an entire length of the knock-out retainer assembly 502.
• the knock-out ram assembly 402 has less empty space around the knock-out 410 and the knock-out retainer assembly 502 despite the die 500 being substantially the same size as the die 200, and despite the dimensions of the knockout ram assembly 402 being sized to handle the same size containers as the conventional knockout ram assembly 102.
• the knock-out ram assembly 402 includes a conduit 510 through the knock-out ram 408 and a conduit 512 through the knock-out retainer assembly 502.
• the combined conduits 510 and 512 pressurize the knock-out ram assembly 402 during use to retain a container (not shown).
• the lack of equivalent spaces in the knock-out ram assembly 402 as the areas 206 and 208 in the conventional knock-out ram assembly 102 reduces the pressurization requirements during use of the knock-out ram assembly 402.
• the reduced requirements allow large containers to be processed within container processing machinery using the knock-out ram assembly 402 at speeds similar to speeds used for small containers, such as at about 2400 containers per minute rather than about 1800 containers per minute.
• the weight of the knockout retainer assembly 502 is the same or even weight as the conventional knock-out retainer 202.
• the inventive knock-out retainer assembly 502 weighs about 0.37 kilograms (kg) to about 0.46 kg, such as 0.40 kg.
• the conventional knock-out retainer 202 weighs about 0.45 kg.
• the bulk density of the knock-out retainer assembly 502 assembly is less than the bulk density of the conventional knock-out retainer 202.
• the knock-out retainer 202 is formed of metal, such as steel and, particularly, tool steel.
• the inventive knock-out retainer assembly 502 is formed of multiple different materials to save weight, as further described below with respect to FIG. 9.
• the outer diameter represented by the line 518 is smaller than the outer diameter of the conventional knock-out ram 108, represented by the line 118 in FIG. 2.
• the weight of the knock-out ram 408 is less than the weight of the conventional knock-out ram 108, even if both are made of the same material.
• the weight of the knock-out ram 408 can be about 2.3 kg.
• the weight of the conventional knock-out ram 108 can be about 4.6 kg.
• the outer diameters of the push ram 414 and the conventional push ram 114 can be substantially similar.
• the push ram 414 is substantially hollow beyond where the push plate 416 connects to the push ram 414 along a majority of the push ram 414 based on the presence of a hollow portion 514.
• the conventional push ram 114 does not include an equivalent hollow portion and is instead substantially solid.
• the hollow portion 514 in the push ram 414 allows the push ram 414 to have a significant weight advantage as compared to the conventional push ram 114.
• the weight of the push ram 414 can be about 3.5 kg to about 4.8 kg.
• the weight of the conventional push ram 114 can be about 5.1 kg.
• FIG. 7 an exploded perspective view of the knock-out ram assembly 402 is shown according to an embodiment of the present invention.
• the knock-out 410 and the knock-out retainer assembly 502 connect to the knock-out ram 408 at the end 408a of the knock-out ram 408.
• This connection arrangement allows the knock-out 410 and the knock-out retainer assembly 502 to move with the knock-out ram 408.
• the die 500 connects to the bushing 406 at the end 406a of the bushing 406. This connection arrangement allows the die 500 to remain stationary with the bushing 406 as the knock-out ram 408 translates relative to the bushing 406.
• FIG. 8 is a perspective view of the knock-out 410 of the knock-out ram assembly 402 of FIG. 4, according to an embodiment of the present invention.
• the knockout 410 includes the annular groove 418 that reduces the overall weight of the knock-out 410 by removing unnecessary material.
• the wall thickness of the knock-out 410 can be about 6 mm. By being able to be made from other materials than tool steel, such as ceramic, the knockout 410 can also be less expensive to manufacture.
• FIG. 9 is an exploded perspective view of the knock-out retainer assembly 502 of the knock-out ram assembly 402 of FIG. 4, according to an embodiment of the present invention.
• the knock-out retainer assembly 502 includes a retainer 900, a bias spring 902, a filler body 904, and a retaining ring 906.
• the retaining ring 906 maintains the filler body 904 on the retainer 900.
• the bias spring 902 maintains the filler body 904 biased under tension on the retainer 900.
• the retainer 900 maintains the knock-out retainer assembly 502 connected to the knock-out ram 408 by the threaded portion 908 engaging with the knock-out ram 408.
• the threaded portion 908 is configured to outwardly engage a corresponding threaded portion 516 the knock-out ram 408 (FIG. 5). This differs from the knock-out retainer 202 of the knock-out ram assembly 402, in which the conventional knock-out retainer 202 includes the inwardly facing threaded portion 214 configured to engage the outwardly facing corresponding threaded portion 216 of the knock-out ram 108.
• the retainer 900 includes a nozzle 910 through which the conduit 512 (FIG. 5) extends.
• the nozzle 910 is tapered to reduce the amount of material needed to form the nozzle 910, which reduces the weight of the retainer 900, as described below.
• the filler body 904 has a complementary taper (FIG. 5) where the filler body 904 abuts the retainer 900.
• the retainer 900 can be formed of metal, such as steel and, particularly, tool steel.
• the primary role of the filler body 904 is to occupy space so that less space must be pressurized during use of the knock-out ram assembly 402.
• the filler body 904 can be formed of a material that is lighter than steel, such as a polymer.
• the material can be Nylon, Delrin, acrylonitrile butadiene styrene (ABS), polypropylene, and the like.
• ABS acrylonitrile butadiene styrene
• the filler body 904 can weigh about 0.1 kg to about 0.2 kg, depending on the size of the corresponding necking stages associated with the filler body 904.
• the retainer 900 can weigh about 0.19 kg.
• the ram system of the present invention can handle large containers at speeds traditionally reserved for small containers within container processing machinery. For example, where conventional container processing machinery must run at about 1800 containers per minute as a result of the increased size of the containers of the included conventional ram systems, container processing machinery with the ram system of the present invention can instead run at about 2400 containers per minute or even higher.
• the increased speeds result in increased economics of the container processing machinery because the container processing machinery can produce more containers for a given amount of time than the conventional processing machinery.
• the container processing machinery of the present invention can also meet a customer’s demands with fewer machines and/or container lines.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Press Drives And Press Lines (AREA)
• Shaping Metal By Deep-Drawing, Or The Like (AREA)
• Debugging And Monitoring (AREA)
• Automatic Assembly (AREA)

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Publications (1)

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• 2022
  • 2022-08-04 EP EP22761779.2A patent/EP4380741A1/de active Pending
  • 2022-08-04 KR KR1020247006776A patent/KR20240046194A/ko unknown
  • 2022-08-04 US US18/294,921 patent/US20240335871A1/en active Pending
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  • 2022-08-04 CA CA3228067A patent/CA3228067A1/en active Pending
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  • 2022-08-04 CN CN202280066360.4A patent/CN118055813A/zh active Pending

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