CN112955591A - Roving frame with sectional drafting roller - Google Patents
Roving frame with sectional drafting roller Download PDFInfo
- Publication number
- CN112955591A CN112955591A CN201980071457.2A CN201980071457A CN112955591A CN 112955591 A CN112955591 A CN 112955591A CN 201980071457 A CN201980071457 A CN 201980071457A CN 112955591 A CN112955591 A CN 112955591A
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- China
- Prior art keywords
- roving frame
- group
- drafting
- lower cylinder
- lower roller
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
- D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
- D01H5/70—Constructional features of drafting elements
- D01H5/74—Rollers or roller bearings
- D01H5/82—Arrangements for coupling roller sections
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
- D01H1/14—Details
- D01H1/20—Driving or stopping arrangements
- D01H1/22—Driving or stopping arrangements for rollers of drafting machines; Roller speed control
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Treatment Of Fiber Materials (AREA)
Abstract
A roving frame (1) of a spinning line comprises a drafting device (10) with a third lower roller (103), a second lower roller (102) and a first lower roller (101). The third lower roller (103) and the second lower roller (102) are segmented, while the first lower roller (101) is continuous or segmented between the ends of the roving frame.
Description
The present invention relates to the field of machines for spinning plants in which short fibers are processed to obtain yarns wound into bobbins. In particular, the subject of the invention is a roving frame for processing a sliver to obtain a roving wound into bobbins (typically with a drafting machine) for use in a spinning line.
During operation of the roving frame, the fiber sliver travels from the storage container to the drafting device and then to the rotating fin where it is wound into a bobbin.
The draft device comprises: drawing cylinders, generally three, having a continuous longitudinal extension along the machine; and opposite pressure rollers coupled by pressure to the respective drafting rollers so as to form a plurality of drafting points placed longitudinally side by side.
The drafting rollers are motorized, while the pressure rollers coupled to the respective drafting rollers are rotated by pressure drive.
In order to increase the profits of spinning plants, which involve high initial investment costs for constructing and starting the plant, manufacturers are constantly striving to improve the performance of individual machines.
In the case of roving frames, in addition to the increased automation of the functions, the trend is to develop solutions with a large number of drafting points, in order to increase the hourly productivity of the machine.
However, it has been found experimentally that increasing the drafting point increases the damage to the drafting rollers and the devices used to move the drafting rollers.
The object of the invention is to produce a roving frame equipped with a drafting device having a large number of drafting points and high structural reliability.
This object is achieved by a roving frame according to claim 1. The dependent claims describe further preferred embodiments of the invention.
The characteristics and advantages of the roving frame according to the invention will become clearer from the following description, given by way of non-limiting example with reference to the accompanying drawings, in which:
fig. 1 schematically shows a roving frame according to an embodiment of the invention;
figures 2a and 2b show the drafting device of the roving frame of figure 1 with a mechanically adjusted draft and with three and four cylinders, respectively;
fig. 2c and 2d show views of another drafting device of the roving frame in fig. 1, with mechanically adjusted drafting, and with three and four rollers, respectively;
figures 3a and 3b show views of the drafting device of the roving frame in figure 1, with electronically regulated drafting, and with three and four rollers, respectively;
fig. 3c and 3d show views of another drafting device of the roving frame in fig. 1, with electronically regulated drafting, and with three and four rollers, respectively.
With reference to the figures, a roving frame of a spinning line is indicated in its entirety by 1.
Generally, upstream of the roving frame 1 is a drawing machine for producing a drawn sliver fed to the roving frame; the roving frame processes the fiber sliver and produces a roving that is wound into bobbins, which are then transported to a spinning frame downstream of the roving frame for further processing.
The roving frame 1 has a storage area 2 located at the back of the machine; in the storage area, fiber strands produced by the drawing machine are stored, wound and stored in a container 4.
Also located in this storage area 2 is a creel 6, consisting of a frame equipped with rollers 8 having a main extension in the longitudinal direction X, generally of hexagonal cross section and generally motorized, and arranged above the containers 4.
The sliver coming out of the container 4 is placed above the roller 8 and fed to the roving frame 1.
The roving frame 1 comprises a machine body 2 comprising a drafting device 10 consisting of a pair of superimposed rollers pressure-engaged with a circumferential rotation speed increasing from upstream to downstream so as to progressively stretch the fiber sliver passing between the coupled rollers.
In particular, the drafting device 10 comprises motorized lower rollers, for example three or four lower rollers, each extending along the roving frame in the longitudinal direction X. Each lower roller cooperates with a number of separate idle upper rollers, usually supported in pairs by pressure arms.
Preferably, the pressure arm is pneumatically pushed to ensure pressure coupling between the lower and upper rollers.
Downstream of the drafting device 10, the machine body 2 comprises a rail 20 extending in the longitudinal direction over the entire length of the roving frame to define an upper zone above the rail and a lower zone below it.
The rail 20 houses a plurality of necks 22 protruding from a rail base 21 of the rail 20, the necks being organized into two longitudinal rows that are longitudinally offset.
The machine body 2 also comprises a plurality of fins 30, which are arranged in the lower region of each neck 22 and are supported by the rails 20. The fins 30 are adapted to be rotated about respective vertical axes by means of a fin motor.
The machine body 2 also comprises a trolley 40, which is arranged in the lower region and carries a plurality of spindles 42, each placed coaxially with a respective fin 30. The trolley 40 is vertically movable in an alternating motion for forming the tube by means of a first trolley motor.
In addition, the trolley 40 can be translated horizontally and/or rotated by means of a second trolley motor for the operations of lifting the tube and loading the empty tube.
The fins 30 are also equipped with suitable forming means to keep the rovings attached to the tubes placed on the respective spindles 42 or to the tubes during forming.
The fiber sliver from the creel 6 travels through the drafting device 10 and then into the respective neck 22, through which neck 22 it travels into the lower region of the roving frame.
Here, the fiber strands enter the respective fins 30 through the neck 22 and exit from the lower end; the trolley 40 moves in an alternating vertical motion so that the roving is wound on a tube placed on a spindle and forms a bobbin.
Once the tube is formed, it is picked up automatically or manually and transported to the spinning frame for further processing.
Finally, the roving frame comprises an electronic unit for controlling the operation of the entire roving frame, operatively connected to the various components of the roving frame to receive control signals and to send command signals.
Examples with mechanically set drafting
According to a first embodiment of the invention (fig. 2a), along the feeding direction a of the sliver from upstream to downstream, the drafting device 10 comprises a third lower cylinder 103, a second lower cylinder 102 and a first lower cylinder 101, which extend longitudinally over the entire length of the machine.
The third lower roller 103 comprises a first portion 103' and a second portion 103 ″ separated and coaxial from each other, which typically have different lengths.
Likewise, the second lower roller 102 comprises a first portion 102' and a second portion 102 ″ that are separate and coaxial with each other.
In other words, the third drafting roller and the second drafting roller are segmented.
Preferably, the length of the first portion 102 'is equal to the length of the first portion 103' of the third lower drum 103, and the length of the second portion 102 "is equal to the length of the second portion 103" of the third lower drum 103.
The first lower roller 101 is continuous between the ends of the machine.
The drafting device 10 also comprises a first drive group 50' for moving the lower cylinder, arranged at one end of the machine, and a second drive group 50 "arranged at the other end of the machine.
The electronic unit is operatively connected to the first drive-group 50 ' and/or the second drive-group 50 "in order to receive the operation control signals of the first drive-group 50 ' and/or the second drive-group 50" and to send signals to command the first drive-group 50 ' and/or the second drive-group 50 ".
The first drive-group 50 ' comprises a first electric motor 52 ' with a relative reduction and a main transmission group 54 ', for example formed by gears.
The main transmission group 54 'is directly connected to the first motor 52' and the first lower roller 101, preferably to a first end thereof.
The first driving group 50 ' also comprises a first transmission group 56 ', or drafting group, for example formed by gears, directly connected to the first lower cylinder 101 and to the first portion 103 ', preferably to the first end thereof, of the third lower cylinder 103.
Finally, the first driving group 50 'comprises a second transmission group 58' or pre-drawing group, preferably comprising gears, directly connected to the first portion 103 'of the third lower cylinder 103 and to the first portion 102' of the second lower cylinder 102, preferably to the first end thereof.
The second drive group 50 "also comprises a first transmission group 56", for example formed by gears, which is directly connected to the first lower roller 101 and to the second portion 103 ", preferably at the second end, of the third lower roller 103.
Furthermore, the second drive group 50 "comprises a second transmission group 58", preferably comprising gears, and directly connected to the second portion 103 "of the third lower roller 103 and to the second portion 102", preferably at the second end thereof, of the second lower roller 102.
According to a second embodiment of the invention (fig. 2b), the drafting device 10 further comprises, with respect to the above-described embodiment, a fourth lower cylinder 104, which is arranged between the first lower cylinder 101 and the second lower cylinder 102.
The fourth lower roller 104 is continuous between the ends of the machine.
Furthermore, the first drive group 50 'comprises a third transmission group 60', preferably comprising gears, and directly connected to the first lower roller 101 and the fourth lower roller 104, preferably at the first ends thereof.
According to a third embodiment of the invention (fig. 2c), the drafting device 10 is substantially identical to the first embodiment described above (fig. 2a), but the first lower cylinder 101 is segmented.
In particular, the first lower roller 101 comprises a first portion 101' and a second portion 101 ″ separated and coaxial from each other, which typically have different lengths.
Preferably, the length of the first portion 101 'is equal to the length of the first portion 102' of the second lower drum 102, and the length of the second portion 101 "is equal to the length of the second portion 102" of the second lower drum 102.
In this embodiment, the main transmission group 54 ' is directly connected to the first motor 52 ' and the first portion 101 ' of the first lower roller 101, preferably to a first end thereof.
The first driving group 50 'also comprises a first transmission group 56', or drafting group, for example formed by gears, directly connected to the first portion 101 'of the first lower cylinder 101 and to the first portion 103' of the third lower cylinder 103, preferably to the first end thereof.
Finally, the first driving group 50 'comprises a second transmission group 58' or pre-drawing group, preferably comprising gears, directly connected to the first portion 103 'of the third lower cylinder 103 and to the first portion 102' of the second lower cylinder 102, preferably to the first end thereof.
The second drive-group 50 "comprises a second electric machine 52" with a relative reduction and a main transmission group 54 ", formed for example by gears.
The main transmission group 54 "is directly connected to the second motor 52" and to the second portion 101 "of the first lower roller 101, preferably to the second end thereof.
The second driving group 50 "also comprises a first transmission group 56", or drafting group, for example formed by gears, directly connected to the second portion 101 "of the first lower cylinder 101 and to the second portion 103", preferably to the first end, of the third lower cylinder 103.
Finally, the second driving group 50 "comprises a second transmission group 58" or pre-drawing group, preferably comprising gears, directly connected to the second portion 103 "of the third lower cylinder 103 and to the second portion 102" of the second lower cylinder 102, preferably to the second end thereof.
According to a fourth embodiment of the invention (fig. 2d), the drafting device 10 is substantially identical to the second embodiment described above (fig. 2b), but the first lower cylinder 101 and the fourth lower cylinder 101 are segmented.
In particular, the first lower roller 101 comprises a first portion 101' and a second portion 101 ″ separated and coaxial from each other, which typically have different lengths.
Preferably, the length of the first portion 101 'is equal to the length of the first portion 102' of the second lower drum 102, and the length of the second portion 101 "is equal to the length of the second portion 102" of the second lower drum 102.
Furthermore, the fourth lower roller 104 comprises a first portion 104' and a second portion 104 ″ separate and coaxial from each other, which typically have different lengths.
Preferably, the length of the first portion 104 'is equal to the length of the first portion 102' of the second lower drum 102, and the length of the second portion 104 "is equal to the length of the second portion 102" of the second lower drum 102.
In the present embodiment, the first drive-group 50 ' comprises a first electric motor 52 ' with a relative reduction and a main transmission group 54 ', for example formed by gears.
The main transmission group 54 ' is directly connected to the first motor 52 ' and to the first portion 101 ' of the first lower roller 101, preferably to a first end thereof.
The first driving group 50 'also comprises a first transmission group 56', or drafting group, for example formed by gears, directly connected to the first portion 101 'of the first lower cylinder 101 and to the first portion 103' of the third lower cylinder 103, preferably to the first end thereof.
Furthermore, the first driving group 50 'comprises a second transmission group 58' or pre-drawing group, preferably comprising gears, directly connected to the first portion 103 'of the third lower cylinder 103 and to the first portion 102' of the second lower cylinder 102, preferably to the first end thereof.
Finally, the first driving group 50 'comprises a third transmission group 60', preferably comprising gears, directly connected to the first portion 101 'of the first lower roller 101 and to the first portion 104', preferably to the first end thereof, of the fourth lower roller 104.
The second drive-group 50 "comprises a second electric machine 52" with a relative reduction and a main transmission group 54 ", formed for example by gears.
The main transmission group 54 "is directly connected to the second motor 52" and to the second portion 101 "of the first lower roller 101, preferably to the second end thereof.
The second driving group 50 "also comprises a first transmission group 56", or drafting group, for example formed by gears, directly connected to the second portion 101 "of the first lower cylinder 101 and to the second portion 103", preferably to the first end, of the third lower cylinder 103.
Furthermore, the second driving group 50 "comprises a second transmission group 58" or pre-drawing group, preferably comprising gears, directly connected to the second portion 103 "of the third lower cylinder 101 and to the second portion 102" of the second lower cylinder 102, preferably to the second end thereof.
Finally, the second driving group 50 "comprises a third transmission group 60", preferably comprising gears, directly connected to the second portion 101 "of the first lower roller 101 and to the second portion 104", preferably to the second end thereof, of the fourth lower roller 104.
The above embodiments are particularly suitable for mechanical adjustment of the draft; in other words, in order to vary the rotational speed of the lower drum to obtain the desired draft ratio of the sliver being processed, the gears of the drive set are replaced to obtain the desired transmission ratio.
Example of drafting with electronic setting
According to the first embodiment of the present invention (fig. 3a), the structure and function of the drafting device 10 are similar to those of the above-described first embodiment (2a), except as follows.
The first drive group 50 'comprises a first motor 52' that moves only the first lower roller 101, mechanically decoupled from the third lower roller 103 and the second lower roller 102.
Furthermore, the first drive group 50 ' comprises an additional motor 53 ' which directly moves the first portion 103 ' of the third lower cylinder 103 by means of the first transmission group 56 ', while the first portion 103 ' of the third lower cylinder 103 moves the first portion 102 ' of the second lower cylinder 102 by means of the second transmission group 58 '.
Furthermore, the second drive group 50 "comprises an additional motor 53" which directly moves the second portion 103 "of the third lower cylinder 103 by means of the first transmission group 56" and the second portion 103 "of the third lower cylinder 103 moves the second portion 102" of the second lower cylinder 102 by means of the second transmission group 58 ".
According to the second embodiment of the present invention (fig. 3b), the structure and function of the drafting device 10 are similar to those of the above-described second embodiment (2b), except as follows.
The first driving group 50 'comprises a first motor 52' that moves only the first lower roller 101 and the fourth lower roller 104, which are mechanically decoupled from the third lower roller 103 and the second lower roller 102.
In particular, the first motor 52 ″ moves the first lower roller 101 directly by means of the main transmission group 54 ', while the first lower roller 101 moves the fourth lower roller 104 by means of the third transmission group 60', which is preferably arranged at a first end thereof.
Furthermore, the first drive group 50 ' comprises an additional motor 53 ' which directly moves the first portion 103 ' of the third lower cylinder 103 by means of the first transmission group 56 ', while the first portion 103 ' of the third lower cylinder 103 moves the first portion 102 ' of the second cylinder 102 by means of the second transmission group 58 '.
Furthermore, the second drive group 50 "comprises an additional motor 53" which directly moves the second portion 103 "of the third lower cylinder 103 by means of the first transmission group 56" and the second portion 103 "of the third lower cylinder 103 moves the second portion 102" of the second lower cylinder 102 by means of the second transmission group 58 ".
According to a third embodiment of the present invention (fig. 3c), the structure and function of the drafting device 10 is similar to the third embodiment (fig. 2c) described above, with the following differences.
The first drive group 50 'comprises a first motor 52' which moves only a first portion 101 'of the first lower cylinder 101 by means of the main transmission group 54'. The first motor 52' is mechanically decoupled from the third lower roller 103 and the second lower roller 102.
Furthermore, the first drive group 50 ' comprises an additional motor 53 ' which directly moves the first portion 103 ' of the third lower cylinder 103 by means of the first transmission group 56 ', while the first portion 103 ' of the third lower cylinder 103 moves the first portion 102 ' of the second lower cylinder 102 by means of the second transmission group 58 '.
The second drive group 50 "comprises an additional motor 53" which directly moves the second portion 103 "of the third lower cylinder 103 by means of the first transmission group 56" and the second portion 103 "of the third lower cylinder 103 moves the second portion 102" of the second lower cylinder 102 by means of the second transmission group 58 ".
Furthermore, the second drive group 50 "comprises an additional motor 52" which moves only the second portion 101 "of the first lower cylinder 101 by means of the main transmission group 54".
According to a fourth embodiment of the present invention (fig. 3d), the structure and function of the drafting device 10 is similar to the above fourth embodiment (fig. 3d), with the following differences.
The first driving group 50 ' comprises a first motor 52 ' which directly moves a first portion 101 ' of the first lower cylinder 101 by means of the main transmission group 54 ', while the first portion 101 ' of the first lower cylinder 101 moves a first portion 104 ' of the fourth lower cylinder 104 by means of the third transmission group 60 ', which is preferably arranged at a first end thereof.
The first motor 52' is mechanically decoupled from the third lower roller 103 and the second lower roller 102.
Furthermore, the first drive group 50 ' comprises an additional motor 53 ' which directly moves the first portion 103 ' of the third lower cylinder 103 by means of the first transmission group 56 ', while the first portion 103 ' of the third lower cylinder 103 moves the first portion 102 ' of the second lower cylinder 102 by means of the second transmission group 58 '.
The second drive group 50 "comprises an additional motor 53" which directly moves the second portion 103 "of the third lower cylinder 103 by means of the first transmission group 56" and the second portion 103 "of the third lower cylinder 103 moves the second portion 102" of the second lower cylinder 102 by means of the second transmission group 58 ".
Furthermore, the second drive group 50 "comprises an additional motor 52" which directly moves the second portion 101 "of the first lower cylinder 101 by means of the first transmission group 54" and the second portion 101 "of the first lower cylinder 101 moves the second portion 104" of the fourth lower cylinder 104 by means of the third transmission group 60 ".
The above embodiments are particularly suitable for electronic regulation of the draft; in other words, the motors of the drive groups are electronically controlled in order to vary the rotational speed of the lower drum to obtain the desired draft ratio of the sliver being processed.
Innovatively, the roving frame according to the present invention is able to satisfy the needs of the art, since it allows to increase the number of drafting points, while overcoming the above mentioned drawbacks, since no damage to the drafting rollers is detected.
Furthermore, advantageously, in the solution according to the invention, no damage to the members for moving the drafting rollers is detected.
In particular, with the solutions of the known art, it has been found that, by increasing the number of drafting points, there is a damage of the gears for transmission between the drafting rollers, in particular with respect to the second drafting roller and the third drafting roller which face the highest torque action.
These gears are small in size and limited in their overall size due to the proximity of the second drafting roller and the third drafting roller.
However, in the solution according to the invention, the second drafting roller and the third drafting roller are segmented, i.e. divided into two parts, thus overcoming this drawback.
According to another advantageous aspect, in the solution according to the invention, the start-up of the drafting rollers is no longer delayed, in the solutions of the prior art, due to the torsion encountered by these rollers.
It is clear that a person skilled in the art, in order to satisfy contingent needs, may make modifications to the roving frame described above, all of which are included within the scope of protection defined by the following claims.
Claims (7)
1. Roving frame (1) for a spinning line for processing a sliver and obtaining a roving wound into bobbins, comprising a drafting device (10) having a plurality of drafting points placed side by side longitudinally, wherein said drafting device (10) comprises, in the feeding direction (A) of the sliver processed, a third lower drum (103), a second lower drum (102) and a first lower drum (101) extending longitudinally between a first end and a second end of the roving frame, wherein said third lower drum (103) consists of a first portion (103 ') and a second portion (103 ") which are coaxial and separated, and said second lower drum (102) consists of a first portion (102') and a second portion (102") which are coaxial and separated, the first portion (103 ') and the second portion (103 ") of the third lower drum (103) are driven in rotation, while a transmission group (58') transmits the movement of the first portion (103 ') of the third lower drum (103) to the first portion (102') of the second lower drum (102), and another transmission group (58") transmits the movement of the second portion (103 ") of the third lower drum (103) to the second portion (102") of the second lower drum (102).
2. Roving frame according to claim 1, wherein said first lower roller (101) is continuous between said first and second ends.
3. Roving frame according to claim 1, wherein said first lower roller (101) is made up of a first portion (101') and a second portion (101 ") coaxial and separated.
4. Roving frame according to any of the previous claims, wherein said drafting device (10) comprises a fourth lower roller (104) located between said second lower roller (102) and said first lower roller (101).
5. Roving frame according to claim 4, wherein said fourth lower roller (104) is continuous between said first and second ends of the roving frame.
6. Roving frame according to claim 4, wherein said fourth lower roller (104) is made up of a first portion (104') and a second portion (104 ") coaxial and separated.
7. Roving frame according to any of the previous claims, comprising an electronic unit for controlling the operation of the whole roving frame, operatively connected to the components of the roving frame to receive control signals and to send command signals.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT102018000010073A IT201800010073A1 (en) | 2018-11-06 | 2018-11-06 | SPINDLE BENCH WITH SEGMENTED IRONING CYLINDERS |
| IT102018000010073 | 2018-11-06 | ||
| PCT/IB2019/059482 WO2020095194A1 (en) | 2018-11-06 | 2019-11-05 | Roving frame with segmented drafting cylinders |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112955591A true CN112955591A (en) | 2021-06-11 |
| CN112955591B CN112955591B (en) | 2023-03-14 |
Family
ID=65409293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201980071457.2A Active CN112955591B (en) | 2018-11-06 | 2019-11-05 | Roving frame with segmented drafting roller |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP3877575B1 (en) |
| JP (2) | JP7481338B2 (en) |
| CN (1) | CN112955591B (en) |
| ES (1) | ES2940746T3 (en) |
| IT (1) | IT201800010073A1 (en) |
| WO (1) | WO2020095194A1 (en) |
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| JPH0941229A (en) * | 1995-07-26 | 1997-02-10 | Howa Mach Ltd | Ending in spinning machine |
| JP6323328B2 (en) * | 2014-12-18 | 2018-05-16 | 株式会社豊田自動織機 | Method for controlling draft device in spinning machine |
-
2018
- 2018-11-06 IT IT102018000010073A patent/IT201800010073A1/en unknown
-
2019
- 2019-11-05 WO PCT/IB2019/059482 patent/WO2020095194A1/en active Search and Examination
- 2019-11-05 EP EP19812847.2A patent/EP3877575B1/en active Active
- 2019-11-05 CN CN201980071457.2A patent/CN112955591B/en active Active
- 2019-11-05 JP JP2021524067A patent/JP7481338B2/en active Active
- 2019-11-05 ES ES19812847T patent/ES2940746T3/en active Active
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2024
- 2024-02-08 JP JP2024017644A patent/JP2024042101A/en not_active Withdrawn
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| DE2930327A1 (en) * | 1979-07-26 | 1981-02-19 | Schlafhorst & Co W | Spinning machine shaft drive - has a torsion adjuster to eliminate free play |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3877575B1 (en) | 2023-01-04 |
| JP2024042101A (en) | 2024-03-27 |
| JP2022506618A (en) | 2022-01-17 |
| ES2940746T3 (en) | 2023-05-11 |
| IT201800010073A1 (en) | 2020-05-06 |
| WO2020095194A1 (en) | 2020-05-14 |
| CN112955591B (en) | 2023-03-14 |
| JP7481338B2 (en) | 2024-05-10 |
| EP3877575A1 (en) | 2021-09-15 |
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