EP3824127A1 - Machine à tricoter circulaire dotée d'une fonction de tricotage de trame - Google Patents

Machine à tricoter circulaire dotée d'une fonction de tricotage de trame

Info

Publication number
EP3824127A1
EP3824127A1 EP19742022.7A EP19742022A EP3824127A1 EP 3824127 A1 EP3824127 A1 EP 3824127A1 EP 19742022 A EP19742022 A EP 19742022A EP 3824127 A1 EP3824127 A1 EP 3824127A1
Authority
EP
European Patent Office
Prior art keywords
needle
stitch
knitting machine
circular knitting
thread
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.)
Withdrawn
Application number
EP19742022.7A
Other languages
German (de)
English (en)
Inventor
Johannes Martin Eppler
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.)
Sipra Patententwicklungs und Beteiligungs GmbH
Original Assignee
Sipra Patententwicklungs und Beteiligungs GmbH
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 Sipra Patententwicklungs und Beteiligungs GmbH filed Critical Sipra Patententwicklungs und Beteiligungs GmbH
Publication of EP3824127A1 publication Critical patent/EP3824127A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B9/00—Circular knitting machines with independently-movable needles
    • D04B9/02—Circular knitting machines with independently-movable needles with one set of needles
    • D04B9/04—Circular knitting machines with independently-movable needles with one set of needles with spring or bearded needles
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/28—Needle pressers
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/02—Knitting tools or instruments not provided for in group D04B15/00 or D04B27/00
    • D04B35/08—Spring or bearded needles

Definitions

  • the present invention relates to a circular knitting machine with less wear on machine parts, in particular stitch-forming elements, and a wider range of possible stitch formation techniques.
  • Conventional circular knitting machines use latch needles as the central stitch-forming elements. These are guided on a rotating needle cylinder and driven out in accordance with their guidance in the lock parts and withdrawn (moved up or down).
  • the tongue of a passing and upwardly driven tongue needle is first opened by a stitch which previously formed on the needle shaft and slides downwards relative to this, and then subsequently during cultivation and removal the needle is closed again by the stitch sliding upward on the needle shaft relative to this.
  • the tongue needle is opened and closed via a tongue hinge. Because of the frequency with which they are operated, possibly under the influence of considerable thread tensions, the tongue hinges of the tongue needles and with them the tongue needles themselves are naturally particularly wear-prone parts within a knitting machine.
  • One type of needle with a simpler construction, in particular without a mechanically movable joint, is the point needle, the hook of which at the upper end of the needle is open at the bottom.
  • the needle hook can be closed elastically by pressure from the outside in the direction of the needle shaft.
  • Circular knitting machines of this type working with pointed needles are described in the documents DE 1 635 878 A and DE 361 135.
  • the needle hook When knitting in a circular knitting machine with pointed needles, the needle hook must be elastically closed from the outside by means of a press wheel when the needle is pulled off (during the cultivation) so that it does not also pick up the old stitch in addition to the new thread.
  • a press wheel is provided outside the needle cylinder and, in order to minimize frictional forces between the passing needle hooks and the press wheel, is preferably provided with active or passive rotation.
  • active or passive rotation due to the different diameters of the large needle cylinder and the significantly smaller press wheel, tangential forces acting on the needle cannot be completely avoided. Since such a press wheel must be provided on every knitting system, the space requirement of the press wheels is also not insignificant, which in particular the possible system density, i.e. the number of knitting systems per inch of the needle cylinder circumference is limited.
  • each point needle of such a circular knitting machine can also be provided with a needle press running parallel to the needle shaft, which presses on the needle hook from the outside during closing and closes it.
  • a needle press running parallel to the needle shaft, which presses on the needle hook from the outside during closing and closes it.
  • the present invention is therefore based on the problem of creating a circular needle knitting machine with pointed needles instead of latch needles, which, with the simplest possible construction, has a lower susceptibility to wear, in particular with the needles, than the conventional circular knitting machine working with latch needles.
  • the circular knitting machine has a needle cylinder rotating about a vertical axis and a sinker ring rotating with the needle cylinder.
  • the needle cylinder In its outer edge area, the needle cylinder is provided with vertically controllable, in particular upwardly drivable, tip needles with needle hooks open downwards as stitch-forming elements, and for each tip needle, an inclusion board supporting the stitch formation is horizontally displaceable in the radial direction on the sinker ring held.
  • a press plate is held horizontally displaceably on the plate ring in the radial direction in order to close the hook tip of the tip needle by pressing the needle tip onto the needle shaft.
  • the press boards are each arranged on the board ring between two adjacent enclosing boards, as space-saving as possible and with little or the least possible play.
  • the stitches are formed by the coordinated vertical or horizontal movements of the needles and the corresponding sinkers for pressing the thread onto the needle shafts.
  • Each containment board has the corresponding
  • the profile facing the needle has two horizontal planes with an intermediate nose protruding towards the needle.
  • the lower of the two support levels serves as the tipping level on which the knitted fabric rests, while the upper support level guides the thread to be inserted in the direction of the needle shaft and contacts it.
  • the vertical distance between the two levels serves to separate the stitch head of the old stitch on the knock-off level from the new thread in the fleas, thus creating a safety distance over which the needle hook can be closed when the needle is removed vertically, so that only the new thread gets into the needle hook.
  • the circular knitting machine according to the invention has a further plate, namely the press plate, for each needle.
  • the press plate is used to press the needle hook when the needle is removed and to lock it elastically.
  • the press plates rotate with the needles and the inclusion plates, so that no tangential forces occur between the press plate and the needle hook when the needle hook is pressed on.
  • the press plates are guided together with the enclosing plates on the plate ring rotating with the needle cylinder.
  • the mutually adjacent containment boards and press boards are as close as possible, i.e. with as little play as possible. If between the containment boards to improve their guidance when driving out and pulling
  • the press plates can also on these
  • Separators are stored.
  • the expulsion and removal of the enclosing plates on the one hand and the pressing plates on the other hand are controlled independently of one another.
  • the outer structure of the circular knitting machine according to the invention differs from the conventional circular knitting machine on the one hand by the use of point needles instead of latch needles and on the other hand by the additional insertion of press plates into the spaces between the containment plates.
  • the additional space requirement is therefore particularly this is comparatively low because of the close arrangement of the press plates between the containment plates, for example on their dividers.
  • the press plates are arranged without any lateral play between two adjacent inclusion plates and, due to their rotation with the needles, do not exert any tangential forces on the needle tip when it is driven radially against it. This thus counteracts excessive wear on the needles and on the enclosing and pressing plates of the circular knitting machine according to the invention.
  • the circular knitting machine can be used for the production of knitted fabrics both according to the knitting principle and according to the active principle.
  • the circular knitting machine can be switched over to both stitch formation techniques or at least be preset.
  • the stitches formed by the machine are replicated by knitting or by the active principle. While the thread is held under tension on the needle shaft during the knitting process, thread loops are presented with less tension during the knitting process. The thread tension is also lower during the curling process than during knitting.
  • the circular knitting machine according to the invention can therefore be equipped with a control device for controlling the positioning of the individual containment boards, the individual press boards or both types of boards.
  • the radial displacements of inclusion sinkers can be controlled in such a way that they feed the new thread to the needle shaft before the respective tip needles are pulled off, so that knitting is carried out on the corresponding stitch-forming systems.
  • the inclusion sinkers can also be controlled in such a way that they lead the new thread past the needle shaft in the radial direction before pulling off the respective tip needles and thus present a stitch so that the stitch forming systems.
  • the circular knitting machine can be operated as a knitting machine by suitable control of the thread tension on the one hand and the radial pulling-in movement of its containment boards on the other hand (with a correspondingly firm setting of the lock parts of the containment boards, the machine according to the invention can also be operated to a certain extent as a pure circular knitting machine).
  • the optional switchover between knitting and knitting principle can be done, for example, by adjustable slides, which move the containment boards in the radial direction. By appropriate adjustment of the slide and thus the positioning of the containment boards in the radial direction, the circular knitting machine according to the invention can also produce loops on its different systems at the same time according to the knitting principle and the active principle.
  • the stitch-forming systems of the circular knitting machine according to the invention can be set in advance or can be controlled or switched during operation so that the respective tip needles form stitches from the respectively supplied thread according to the knitting principle or the active principle, catch the supplied thread or in the round run remain.
  • the point needles of the corresponding stitch-forming system are retracted earlier than in the knitting or knitting process, so that the press plates only close the flakes of the respective point needles when both the thread being fed and a previous stitch within the flake.
  • the catching process can be carried out by not moving the press plates so close to the flakes of the respective needle that they close it, so that both the thread fed in and the old stitch can be picked up inside the flake.
  • the needle head of a point needle is generally smaller than that of a latch needle, so that an unwanted widening of the stitches by the needle head is a minor problem. Smaller stitches are possible with the same fineness.
  • the mesh can also not be damaged by the opening and closing needle tongues and their hinges. Due to the lower yarn load, undesirable effects such as flattening, excessive pilling tendency, uneven heights of handles for plush or lining, and twisting of the threads during plating (due to the smaller needle head) are largely avoided.
  • pointed needles also enables the speed of rotation of the needle cylinder to be increased, since there is no need to ensure the absorption of the kinetic rotational energy of the needle tongues.
  • FIGS. 1 a to 1 h show the sequence of the stitch formation method according to the knitting principle in the circular knitting machine according to the invention.
  • FIGS. 2a and 2b each show the different positions of the stitch-forming elements before the needle is removed when knitting and when knitting with the circular knitting machine according to the invention.
  • FIG. 3a shows the position of the stitch-forming elements during the removal of the needle during the catching process
  • FIG. 3b shows the needle movement curve during the catching process.
  • FIG. 4a shows a perspective close-up view of the edge area of the needle cylinder with needles, as well as corresponding sealing and press plates and the corresponding plate locks (in contrast to the circular knitting machine of FIGS. 2a and 2b, the plate lock and plate lock part are integrated here).
  • FIG. 4b shows a detailed view of the knitting or knitting system in FIG. 4a.
  • FIG. 5 shows a cross-sectional view of the sinker ring and the sealing and press sinkers mounted thereon in a cutting direction parallel to the tangential direction on the needle cylinder.
  • FIG. 6 shows a variant of a two-part point needle that can be used in the circular knitting machine, in two views, one with the two needle parts separated from one another and one in the assembled state.
  • FIGS. 1 a to 1 h show the stitch formation according to the knitting principle on a stitch-forming system of the circular knitting machine according to the invention.
  • Figure 1 a shows an enlarged view of the needle 2 in the needle cylinder.
  • the needle is driven out and pulled off in the vertical direction.
  • Figure 1 a it is in the removed state.
  • the last formed "old" stitch of the knitted fabric hangs in its flake tip.
  • the needle 2 is now driven upwards while the old stitch remains on the tee level (the lower support level) 3a of the containment board 3 and is retained by the nose 3c of the board profile.
  • the lock plate 3 mounted on the plate ring 19 is extended outwards (to the right in the drawing) by guiding its control foot 8 in the plate lock part 10, see FIG. 1 b.
  • the needle 2 is then withdrawn downward in FIG. 1e, so that the thread resting on the upper support plane 3b of the lock plate 3 is received in the needle hook.
  • the press plate 4 is extended inwards in the direction of the needle by correspondingly guiding its control foot 7, so that it closes the needle hook elastically by pressure from the outside.
  • the lock plate 3 is pulled back so far that its upper support level 3b releases the new thread 1, while the needle 2 is simultaneously pulled downwards, so that the needle hook and with it the thread 1 pass through it the old stitch still lying on the tee level 3a is drawn.
  • the press plate 4 is retracted and the pulling-off process of the needle 2 is ended (curling), as a result of which the stitch formation process is completed and can start again in the position of FIG. 1 a.
  • FIGS. 2a and 2b show two snapshots of a knitting or knitting process in the circular knitting machine according to the invention.
  • FIG. 2b shows the position of the stitch-forming elements in the knitting process immediately before the needle 2 is withdrawn and thus corresponds approximately to the position in FIG. 1d (the needles and sinkers of the machine in FIGS. 2a and 2b differ slightly from those in FIG. 1 a to 1 h).
  • Figure 2a is the corresponding snapshot mapped in the knitting process.
  • the sealing board 3 is extended further inwards (to the left in the drawing) and thus presents a thread loop extending from the needle shaft to the upper support level 3b. While the thread during the knitting process in FIG.
  • the thread tension during the knitting process in FIG. 2a can be lower and also vary.
  • the presentation of the thread loop by further indenting the lock board ensures a safe wiping process.
  • the circular knitting machine according to the invention is therefore suitable for both knitting and knitting.
  • the machine can have an actuator 15 on the sinker lock 9 with which a sinker lock part 10 can be moved, as a result of which the length of the extension path of the containment plate 3 is switched between a further path for knitting and a shorter path for knitting.
  • the circuit board lock 9 is screwed to the circuit board lock support ring 12.
  • the circular knitting machine permits efficient and safe processing of a large number of different yarns.
  • the knitting function in particular enables the use of more sensitive yarns due to the lower thread tension in the process.
  • the stitch formation takes place in the knitting method according to FIG. 2a in the two steps of placing a thread loop and pulling the thread loop through the old stitch.
  • the thread tension in the thread loop initially increases from the friction point to the friction point due to the rope friction principle and then drops back to zero when the thread loop is presented.
  • the second step when pulling the thread loop through the old stitch, thread sections of the thread loop and the old stitch rub against each other, as a result of which the thread tension increases again.
  • the presentation of the thread loop in the knitting process also has the advantage that the wedge part in the cylinder lock is relieved.
  • the curling angles in it are less steep than when knitting, which in turn reduces the load on the needle guided in the curling part.
  • the knitting or knitting systems of a circular knitting machine that can be used for knitting and knitting should also be able to be adjusted for concentric running and catching.
  • the needle 2 When concentric running, the needle 2 simply remains in its concentric position by appropriately controlling the lock parts and is not driven out at all. The new thread 1 is not even picked up by the needle hook.
  • FIG. 3a shows the position of the knitting system in the catching process, more precisely during the removal of the needle 2.
  • the catching process can be controlled by appropriate control of either the needle withdrawal or the displacement of the press plate 4.
  • an earlier withdrawal of the needle 2 can be set so that the press plate 4 only closes the needle hook when the opening of the needle hook has already passed the old stitch lying on the knock-down plane 3a (and is therefore already inside the needle hook).
  • FIG. 3b shows the needle movement curves for the knitting process and the catching process side by side. While the solid line 16 represents the needle movement along the time axis during the knitting process, the broken line 17 shows the earlier removal of the tip needle 2 during the catching process.
  • a further possibility for implementing the catching process with the circular knitting machine according to the invention is not to extend the press plate 4 on a selected knitting system at all to close the hook needle, but rather to keep it in its retracted position without pressure contact with the needle hook.
  • the corresponding control of the press board 4 takes place, for example, via a suitable setting of the board locks on the respective systems.
  • FIG. 4a shows a perspective view of the needle cylinder 11 from the side (in the variant shown here, board lock 9 and board lock part 10 are integrated).
  • FIG. 4b shows the detail showing the knitting system with thread guide 5.
  • the tip needles 2 which are arranged in the entire circumferential region of the needle cylinder 11, are only shown in a partial section of the cylinder circumference for the sake of clarity.
  • the figures, in particular FIG. 4b, show not only the needles 2 and the sinkers 3 and press plates 4 but also those belonging to the knitting point in the selected section of the cylinder edge Thread guide 5.
  • the sinkers 3 run from the sinker ring 19 from the outside inwards between the needles 2 into sinker guides arranged on the inside of the needle cylinder.
  • the press sinkers 4 are arranged between two adjacent containment sinkers 3 with as little play as possible (see also FIG. 5) and thus face the corresponding tip needle directly.
  • the tip needles are also arranged between the sinkers running towards the sinker guides, so that the latter serve as guides for both the press sinkers and the needles.
  • the press plates 4 take up little additional space in this way, because even with a conventional circular knitting machine that uses latch needles but does not use a press plate, the containment plates 3 are provided spaced apart (so that they can be can be guided past the needles).
  • separating webs 18 are usually provided on the sinker ring 19 in the gaps between the sinkers 3 in order to avoid play between the sinkers 3.
  • Such a machine can be modified to form a circular knitting machine according to the invention by arranging the press plates 4 on the separating webs 18, expediently with as little play as possible with respect to the adjacent inclusion plates 3.
  • one inclusion plate and one press plate could also be used share a channel delimited by appropriate dividers.
  • each knitting system can be set so that it forms loops either according to the knitting principle or according to the knitting principle, only catches the new thread or in Concentricity position remains.
  • the changeover between knitting and knitting function is carried out by the actuator 15 on the circuit board lock with an integrated circuit board lock part.
  • the space-saving arrangement of the press plates 4 between the containment plates 3 permits a relatively high fineness of the circular knitting machine, i.e. a large number of needles per inch on the circumference of the cylinder.
  • Another advantage of this space-saving arrangement is that a large number of knitting systems can also be attached along the circumference of the needle cylinder.
  • more than 88 knitting systems can be provided, which corresponds to a high system density of 2.9 systems per inch (although higher system densities of up to 3.2, for example, are also conceivable).
  • FIG. 6 illustrates a further possible simplification, which consists in the use of two-part point needles in the circular knitting machine.
  • a two-part tip needle has an upper tip needle part 2 'and a lower control foot part 6'.
  • the tip needle part 2 ' extends from the needle hook at the upper end along the needle shaft to a laterally projecting nose, while the control foot part 6' has a nose-receiving gap-like recess and the contour profile required for receiving and guiding in the corresponding cylinder lock part.
  • the nose of the needle part 2 'and the recess of the control foot part 6' are in engagement with one another, but apart from this adapter function, their shape is not restricted; in particular, the recess in the control foot part does not have to have a slot or slot shape.
  • the present invention can also be applied to circular knitting machines which are based on the principle of the so-called relative technique.
  • the containment boards are stored in the upper part of the needle cylinder between the needles. This type of machine therefore does not require a separate circuit board ring.
  • the enclosure boards can be controlled vertically in height and at the same time perform a pivoting movement around their pivot point. This swivel movement replaces the horizontal movement of a conventional containment board.
  • Press wheels arranged outside the circumference of the needle cylinder (one for each stitch-forming system) can be used here as pressing elements for closing the needle hook.
  • the structure of the circular knitting machine according to the invention is based on a further development of conventional circular knitting machines.
  • the circular knitting machine according to the invention can be manufactured as an independent machine;
  • the invention has considerable advantages with regard to the problem of needle wear.
  • the machine according to the invention enables the selection between knitting and knitting as stitch formation techniques within a single machine. LIST OF REFERENCE NUMBERS

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)

Abstract

L'invention concerne une machine à tricoter circulaire équipée d'un cylindre à aiguilles (11) tournant autour d'un axe vertical et d'une bague à platine (19) tournant avec le cylindre à aiguille (11). Le cylindre à aiguille (11) est pourvu, dans sa zone de bord extérieur, d'aiguilles pointues (2) réglables verticalement avec des crochets d'aiguille ouverts vers le bas en tant qu'éléments formant des points, et pour chaque aiguille pointue (2), une plaque d'inclusion (3) soutenant la formation de points est maintenue sur le cylindre à aiguille (11) de la bague à platine (19) afin de pouvoir se déplacer horizontalement dans le sens radial dans le cylindre à aiguille (11). En outre, pour chaque aiguille pointue (2) sur le cylindre d'aiguille (11), une plaque de pression (4) sur la bague à platine (19) est maintenue sur le cylindre à aiguille (11) de manière déplaçable horizontalement dans la direction radiale afin de fermer la pointe du crochet de l'aiguille pointue (2) en appuyant celle-ci contre l'arbre. Les plaques de pression (4) sont disposées sur la bague à platine (19) entre deux plaques d'insertion (3) voisines. Selon l'invention, la machine à tricoter circulaire réduit l'usure des aiguilles et permet de choisir entre le tricotage et le tricotage en chaîne comme techniques de formation de mailles dans une même machine.
EP19742022.7A 2018-07-17 2019-07-16 Machine à tricoter circulaire dotée d'une fonction de tricotage de trame Withdrawn EP3824127A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018117309.1A DE102018117309A1 (de) 2018-07-17 2018-07-17 Rundstrickmaschine mit Wirkfunktion
PCT/EP2019/069104 WO2020016218A1 (fr) 2018-07-17 2019-07-16 Machine à tricoter circulaire dotée d'une fonction de tricotage de trame

Publications (1)

Publication Number Publication Date
EP3824127A1 true EP3824127A1 (fr) 2021-05-26

Family

ID=67352538

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19742022.7A Withdrawn EP3824127A1 (fr) 2018-07-17 2019-07-16 Machine à tricoter circulaire dotée d'une fonction de tricotage de trame

Country Status (9)

Country Link
US (1) US20210332509A1 (fr)
EP (1) EP3824127A1 (fr)
JP (1) JP2021530630A (fr)
KR (1) KR20210033014A (fr)
CN (1) CN112424407A (fr)
BR (1) BR112021000462A2 (fr)
DE (1) DE102018117309A1 (fr)
TW (1) TW202012716A (fr)
WO (1) WO2020016218A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111560701A (zh) * 2020-05-26 2020-08-21 嘉兴万邦宏新材料科技有限公司 经编机压纱板运动装置

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD44766A (fr) *
DE414086C (de) * 1925-05-23 Hemphill Co Rundstrickmaschine mit Hakennadeln
GB191128410A (en) * 1911-12-18 1912-10-17 Moses Mellor And Sons Ltd Improvements in Circular Knitting Machines.
GB146404A (en) 1914-04-14 1921-04-21 Hemphill Co Spring-needle knitting machine
US2075662A (en) * 1934-03-23 1937-03-30 Rubinstein Harry Corrugated fabric and method for making same
US2066470A (en) * 1934-05-12 1937-01-05 Willis A Ingalls Jack presser for knitting machines
US2223072A (en) * 1935-07-09 1940-11-26 Lombardi Knitting Machine Co I Knitting machine and method
DE1158201B (de) * 1958-06-14 1963-11-28 Marcella Sessa Moretta Strumpfrundstrickmaschine mit Spitzennadeln, Pressen und Abschlagplatinen
DE1635878A1 (de) 1968-01-12 1971-06-03 Mandel Jean Nadelpresse und Spitzennadel fuer vielsystemige Strick- und Wirkmaschinen
BG62816B1 (bg) * 1997-09-24 2000-08-31 Николов Метод и устройство за напречно плетене
US6519978B2 (en) * 2001-04-23 2003-02-18 Monarch Knitting Machinery Corp. Apparatus and method for knitting a fabric with a lay-in yarn on a circular knitting machine
JP2008101301A (ja) * 2006-10-19 2008-05-01 Precision Fukuhara Works Ltd 給糸切換装置を有する丸編機

Also Published As

Publication number Publication date
TW202012716A (zh) 2020-04-01
DE102018117309A1 (de) 2020-01-23
JP2021530630A (ja) 2021-11-11
US20210332509A1 (en) 2021-10-28
KR20210033014A (ko) 2021-03-25
WO2020016218A1 (fr) 2020-01-23
CN112424407A (zh) 2021-02-26
BR112021000462A2 (pt) 2021-04-06

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