EP3693498A1 - Garniture de chapeau pour un chapeau marchant d'une carde - Google Patents

Garniture de chapeau pour un chapeau marchant d'une carde Download PDF

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Publication number
EP3693498A1
EP3693498A1 EP20152345.3A EP20152345A EP3693498A1 EP 3693498 A1 EP3693498 A1 EP 3693498A1 EP 20152345 A EP20152345 A EP 20152345A EP 3693498 A1 EP3693498 A1 EP 3693498A1
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EP
European Patent Office
Prior art keywords
row
zone
clothing
rows
flat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20152345.3A
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German (de)
English (en)
Other versions
EP3693498B1 (fr
Inventor
Christian Dratva
Manuel Koch
Günter Steinbach
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.)
Graf und Cie AG
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Graf und Cie AG
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Publication of EP3693498A1 publication Critical patent/EP3693498A1/fr
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Publication of EP3693498B1 publication Critical patent/EP3693498B1/fr
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/02—Carding machines
    • D01G15/12—Details
    • D01G15/14—Constructional features of carding elements, e.g. for facilitating attachment of card clothing
    • D01G15/24—Flats or like members
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/84—Card clothing; Manufacture thereof not otherwise provided for
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G15/00—Carding machines or accessories; Card clothing; Burr-crushing or removing arrangements associated with carding or other preliminary-treatment machines
    • D01G15/84—Card clothing; Manufacture thereof not otherwise provided for
    • D01G15/86—Card clothing; Manufacture thereof not otherwise provided for with flexible non-metallic backing

Definitions

  • the invention relates to a flat clothing for a revolving flat of a card with a working width for processing fibers in a direction of travel across the working width, with a foundation which has a length corresponding to the working width and a width viewed in the direction of the grain, and with a plurality of clothing tips which are formed from U-shaped wire hooks pierced through the foundation from a wire with a cross-sectional width with two points forming legs and a back connecting the two legs with a back length.
  • the legs each have a tip axis.
  • the wire hooks are arranged next to one another with a distance between the opposing tip axes in rows and the backs with a back axis connecting the tip axes in the direction of the working width.
  • a row offset in the direction of the working width, through which wire hooks in successive rows are not arranged one behind the other as seen in the direction of the grain, and a row spacing between two successive rows are provided.
  • the function of the card is, among other things, the elimination of tiny knots (neps) and shell parts with fibers (seed coats), which can no longer be broken down into individual fibers in the subsequent processes.
  • the shell parts & nits result in thick and thin spots in the yarn, which can lead to a reduction in the quality of the yarn and thus a reduction in the sales price.
  • the card also has to remove dust, which is in the form of dust particles consisting of stones, sand, dirt and tiny fibers in the fiber material is included.
  • covers are attached to the card drum in the form of fixed or revolving covers. Fittings are provided on the covers that work together with the fittings on the card drum. This cooperation leads to the cleaning and longitudinal orientation of the fibers.
  • Figure 2 shows a schematic representation of a carding process between a drum clothing 13 and a revolving flat with a flat clothing 14 with a plurality of clothing tips 23.
  • the flat clothing 14 has a width G.
  • the direction of rotation of the card drum and thus the direction of movement of the fiber material 15 held by the drum clothing 13 are indicated by the arrow 17.
  • the revolving cover is moved in the direction 16 through the revolving cover assembly.
  • the drum clothing 13 is moved much faster than the revolving cover and thus the flat clothing 14, which means that the direction of movement 16 of the revolving cover for the explanations does not matter.
  • the fiber material 15 picked up by the drum clothing 13 is guided past the revolving flat or the flat clothing 14 in a direction C of the fibers. Due to the friction between the flat clothing 14 and the fiber material 15 with the support of the centrifugal force due to the rotation of the drum, individual fibers initially remain hanging on the clothing tips 23. They serve as an aid to catching trash parts and debris such as leaf parts 18, dust particles 19, stem parts 20, shell parts 21 and fiber cracks 22.
  • Dust particles 19 can only be properly captured with the lid when a sufficiently tight filter has been created by the fibers , wherein the dust particles 19 get stuck.
  • Another elimination site is the space between the revolving lids. When the revolving lids are filled enough and have been running for a long time, fiber bridges form between the revolving lids. In addition, the centrifugal force pushes air through between the revolving lids and extracts it. This zone can be observed especially when entering the drum.
  • Another point for good breaking up of flakes and fibers is the first edge of each Revolving cover. This must dissolve the remaining flakes, which were not broken up by the blowroom and pre-carding zone, before the parallelization process can take place.
  • Completion of the flat clothing 14 is determined, among other things, by the design of the flat clothing 14. At the same time, the fibers of the fiber material 15 remaining in the drum clothing 13 are aligned parallel to the direction of movement 16 by the clothing tips 23. The carding process is intended, on the one hand, to clean the fiber material 15 and, on the other hand, to even out the position of the individual fibers.
  • the revolving lids basically fulfill four functions: they should break up the fiber flocks down to the individual fiber, remove interfering particles, dissolve fiber cracks and parallelize and orient the fibers. Since, as described above, dirt particles are only separated out after individual fibers have been taken up, a reduced uptake of individual fibers is also necessary for slightly soiled raw materials. The uptake of individual fibers, in turn, depends on the position of the clothing in relation to one another and on the design of the flat clothing. In addition, the longitudinal orientation of the fibers is significantly influenced by the distance between the clothing of the card drum and the revolving cover, the so-called carding gap.
  • all versions have in common that the top clothings should cause the fibers to parallelize and, at the same time, cause trash particles to be separated out and flakes to dissolve.
  • the requirements for the top clothing for optimal parallelization of the fibers do not match the requirements for optimal separation of trash particles and the additional task of breaking up flakes.
  • the known flat top fittings which each have a regular pattern in the arrangement of all the clothing tips, are a compromise between at least two ideals.
  • the WO 2018/104836 A1 tries to remedy this disadvantage by using different flat covers in adjacent revolving flat.
  • a disadvantage of the proposed solution is that the cover fittings according to the disclosure of the WO 2018/104836 A1 the fibers guided past the clothing are deflected to a large extent. Such a strong deflection leads to fiber damage, as a result of which a short fiber content in the card sliver is increased or an increased separation of short fibers has to take place in the spinning preparation process for high quality applications.
  • a high rate of dirt excretion in revolving flats has the disadvantage that this has to be done at the expense of fiber straightening, that is, many good fibers are taken up in the clothing and removed from the carding process and thus also a lower parallelization of the individual fibers accepted in order to achieve a high level of dirt removal.
  • the object of the invention is to create a device which enables the removal of dirt residues, trash parts and nits as well as a high incidence of short fibers from a fiber material with simultaneously high fiber rectification without causing damage to the fiber material or a loss of good fibers.
  • a new type of flat clothing for a revolving flat of a card is proposed with a working width for processing fibers in a fiber running direction applied transversely to the working width, the flat clothing having a foundation which has a length corresponding to the working width and a width seen in the fiber running direction, and includes a variety of trim tips.
  • the clothing tips are formed from U-shaped wire hooks made of a wire with a cross-sectional width forming two tips and a back connecting the two legs with a back length, the legs each having a tip axis.
  • the cross-sectional width of the wire of the wire hooks is measured across the grain.
  • the wire hooks are arranged next to one another with a distance between the opposing tip axes in rows and the backs with a back axis connecting the tip axes in the direction of the working width, with a row offset in the direction of the working width, through which the clothing tips are not arranged one behind the other in successive rows in the direction of the grain, and a row spacing is provided between two successive rows.
  • at least two successive zones are arranged, each zone having at least three rows and the row offset of the first zone differing from the row offset of the second zone.
  • the different arrangement of the clothing tips in at least two zones enables the compromise made up to now to be resolved.
  • the clothing tips are arranged differently in the two zones, so that it is possible to provide a flat clothing that is adapted to the requirements of parallelization or dirt and short fiber separation.
  • the fiber packet dissolution process is also accounted for by the fact that the flat top clothing can be easily cleaned by cleaning rollers. Because the row offset, i.e. the distance in the direction of the working width between two clothing tips in successive rows, differs, it is possible to design a further or narrower passage for the fibers in the direction of the grain.
  • the row spacing between a row of the second zone and a subsequent further row of the second zone as seen in the fiber running direction is different from the row spacing between the row of the second zone and the preceding row of the second zone.
  • the change in the row spacing from one row to the next in combination with the small row offset leads to the number of clothing tips per path being uneven in the direction of the grain, which results in increased parallelism.
  • the division of the flat top clothing into different zones, with a more even density of clothing tips being provided in a first zone results in an overall non-regular distribution of the clothing tips over the working width when viewed in the grain direction. This results in the effect that the individual fibers on their way through the main carding zone have a high probability of passing so close to a clothing tip that the fibers are straightened due to the friction.
  • the row offset of the first zone and the row offset of the second zone are greater than the cross-sectional width of the wire.
  • the flat top clothing is geared towards the high production output of the machine with slightly soiled cotton, mixed wool with MMF (Man Made Fibers) or even just MMF. Due to the larger gaps between the clothing tips, large amounts of soiling can still be picked up and simple cleaning with a good separation and parallelization effect is achieved. In relation to a certain working width, the clothing tips are far apart, so that there is a large passage between the individual clothing tips compared to a fiber diameter.
  • the row offset of the first zone and the row offset of the second zone are less than or equal to the cross-sectional width of the wire.
  • the flat clothing tends to be more oriented towards the parallelization of fibers.
  • the clothing tips are close to each other, so that there is a smaller passage between the individual clothing tips compared to a fiber diameter. A large part of the fibers to be processed thus come into contact with one of the clothing tips, which consequently brings about a straightening of a large part of the fibers contained in the fiber material due to the more closely spaced clothing tips.
  • the row offset of the first zone is greater than the cross-sectional width of the wire and the row offset of the second zone is less than or equal to the cross-sectional width of the wire.
  • the arrangement of the clothing tips in the first zone is identical to the arrangement according to the first embodiment. In the second zone, however, the row offset is less compared to the cross-sectional width of the wire used. By narrowing the passages between the clothing tips, this increases the cleaning and straightening of the fibers in the direction of the grain. A staggered removal of dirt with the highest carding performance and the best cleanability of the flat top clothing is achieved.
  • the first zone can dissolve the fiber flocks better and the coarse dirt particles can be better worked out when cleaning the flat top with a cleaning roller in the first zone, since the distances are larger and thus more space for penetrating cleaning bristles of the cleaning roller down to the bottom of the flat top consists.
  • the improved cleaning properties result in constant performance over the life of the revolving lid.
  • the row offset is preferably the same from one row to a subsequent row. It is also advantageous if the row offset in the second zone is the same from one row to the next. As a result, the top clothing is separated into two zones in the grain direction, with no smooth transition between the zones.
  • the row spacing between a row of the second zone and a subsequent row of the second zone is preferably smaller than the row spacing between the row of the second zone and the preceding row of the second zone.
  • the reduction in the row spacing results in the number of clothing tips per distance increasing in the direction of the grain, thereby increasing the processing of the fibers.
  • an extension of the first zone is 30% to 70% of an extension of the second zone in the direction of the grain. It has been shown that it is advantageous if the second zone has at least 7 rows. With a smaller number of rows, a division into subgroups within the second zones is not possible. It has also been shown that increasing the number of rows in the second zone can increase its effect.
  • two to four rows arranged one behind the other form a subgroup in the second zone and the row spacing between consecutive rows within a subgroup, viewed in the direction of the grain, increases or decreases, with a subgroup with decreasing row spacing or a subgroup for each subgroup with increasing row spacing with decreasing row spacing, a subgroup with increasing row spacing follows.
  • This wave-like arrangement of the clothing tips results in a further improvement of the effects described above.
  • a manufacturing advantage arises if, as an alternative to the formation of subgroups in the second zone, two to four rows arranged one behind the other form a row group, the row spacing being the same within a row group.
  • the flat top clothing for revolving flat has 30 to 48 rows, of which 3 to 45 rows belong to the first zone.
  • the number of rows introduced into the flat top is limited by the process technology due to the width of the common flat top.
  • the distance from a tip axis of a first wire hook to the opposite tip axis of a subsequent wire hook of the same row is preferably the same as the back length of the wire hook. This results in a regular setting pattern of the clothing tips. In terms of manufacturing, it is advantageous if the wire hooks have a back length between the tip axes of less than 3.5 mm.
  • FIG. 1 shows a schematic representation of the side view of a known card 1 in the form of a revolving flat card.
  • Fiber flocks fed to a feed device 2 are taken over as fiber wadding 3 by a lickerin 4 and transferred to a card drum 5.
  • Licker-in 4 and card drum 5 are each covered with clothing wires, not shown here.
  • the fiber flocks are dissolved, cleaned and parallelized on the card drum 5. This process happens through cooperation of card drum 5 and components arranged around card drum 5. After the fiber flocks have been taken over by the card drum 5, they are transported through a pre-carding zone 6, a main carding zone and a post-carding zone 7 to a doffing roller 10.
  • a revolving flat unit 8 is arranged in the main carding zone, which has individual revolving flat 9 or flat bars.
  • the revolving flat 9 are guided by the revolving flat assembly 8 against the direction of rotation of the carding drum 5 along part of the circumference of the carding drum 5.
  • the pre-carding zone 6 and post-carding zone 7 are provided with stationary working elements.
  • the stationary working elements consist of, for example, carding elements, knives and guide or cover elements.
  • the fibers form a fiber fleece on the card drum 5, which is removed from the take-off roller 10 and formed into a card sliver 12 in a manner known per se in a sliver-forming unit 11 consisting of various rolls and guide elements. This card sliver 12 is then deposited into a transport can by a sliver deposition (not shown).
  • FIG 3 shows a schematic representation of a carding point in the main carding zone with a revolving flat 9 in interaction with the carding drum 5.
  • the revolving flat 9 consisting of the flat rod with a back part 24, a base part 25 and a flat clothing 14 attached to the base part 25 extends over the entire working width of the Card drum 5.
  • the card drum 5, which rotates in the direction of the arrow, is only partially shown with the drum clothing 13 on it.
  • the top clothing 14 is fastened, for example, to the base part 25 of the revolving cover 9 with fastening clips 26, the clothing tips 23 of the flat top 14 being directed towards the drum clothing 13.
  • the carding distance A is formed between the clothing tips 23 of the flat clothing 14 and the drum clothing 13.
  • the carding distance A of today's cards is less than 0.2 millimeters.
  • Figure 4 shows a schematic representation of a flat top 14 to explain the terms.
  • a section of a foundation 27 is shown with a length F and a width G, through which wire hooks 28 forming clothing tips 23 are pierced.
  • the wire hooks 28 are in the direction of the length F in rows 33 one behind the other arranged, the rows 33 having a row offset K between a first row 33 and a subsequent row.
  • the longitudinal direction corresponds to a working direction of the flat clothings 14 used in a revolving flat, which is transverse to the direction C of the grain.
  • the wire hooks 28 are inserted next to one another at a distance H.
  • a row spacing L is provided between the individual rows 33.
  • the wire hooks 28 are formed from a wire with a cross-sectional width b.
  • the U-shaped wire hooks 28 have two legs 29 and a back 30 connecting the legs 29.
  • the two legs 29 are each formed into a clothing tip 23 at their ends opposite the back 30.
  • the clothing tips 23 are generally formed by a grinding process after the wire hooks 28 have been inserted into the foundation 27.
  • the legs 29 have a tip axis 31 and the backs 30 have a back axis 32.
  • a back length E is given by the distance between the tip axes 31 of a wire hook 28 in the direction of the back axis 32.
  • Figure 5 shows a schematic representation of a first embodiment of a flat top 14, the view shown is from the back side of the flat top 14, so that the back 30 of the individual wire hooks 28 protruding from the foundation 27 can be seen.
  • a clothing tip 23 is formed on the non-visible side of the flat clothing 14.
  • two zones 34 and 35 are shown in the direction of grain C over the width G of the flat clothing 14.
  • a plurality of rows 36 and 37 following one another in the direction of the grain C are arranged.
  • the rows 36 and 37 have a row spacing L1.
  • the wire hooks 28 arranged next to one another in the rows 36, 37 show a row offset K1, the row offset K1 indicating the offset of the clothing tips formed by the wire hooks 28. This is made clear by specifying the row offset K1 between row 37 and the row following in the direction of grain C.
  • a second zone 35 which has an extent N
  • a plurality of rows 38, 39, 40 following one another in the direction of fiber travel C are arranged.
  • the rows 38 and 39 and the rows 39 and 40 have a row spacing L2.
  • the wire hooks 28 arranged next to one another in the rows 38, 39, 40 show a row offset K2, the row offset K2 likewise indicating the offset of the clothing tips formed by the wire hooks 28.
  • the row offset K2 of the second zone N differs from the row offset K1 of the first zone M.
  • the row spacing L2 between rows 38, 38, 40 following one another in the fiber direction C is decreasing as seen in the fiber direction C.
  • Figure 6 shows a schematic representation of a further embodiment of a flat top 14 from the same perspective as Figure 5 .
  • two zones 34 and 35 are also shown in the direction of grain C over the width G of the flat clothing 14.
  • a plurality of rows 36 and 37 following one another in the direction of the grain C are arranged.
  • the rows 36 and 37 have a row spacing L1.
  • the wire hooks 28 arranged next to one another in the rows 36, 37 show a row offset K1, the row offset K1 indicating the offset of the clothing tips formed by the wire hooks 28. This is made clear by specifying the row offset K1 between row 37 and the row following in the direction of grain C.
  • a second zone 35 which has an extension N
  • several rows 38, 39, 40 following one another in the direction of the grain C are arranged, the rows 38, 39 and 40 forming a subgroup 42.
  • the rows 38 and 39 have a row spacing L2 and the rows 39 and 40 have a row spacing L3.
  • the following three rows form a second subgroup 43, the row spacing L2 and L3 in the second subgroup 43 as seen in the direction C of the fibers the opposite course of which is arranged in the first subgroup 42.
  • a subgroup 43 with an increasing row spacing L2, L3 within the subgroup 43 follows a preceding subgroup 42 with a decreasing row spacing L2, L3.
  • this course of the row spacing is reversed again.
  • the wire hooks 28 arranged next to one another in the rows 38, 39, 40 show a row offset K2, the row offset K2 likewise indicating the offset of the clothing tips formed by the wire hooks 28.
  • the row offset K2 of the second zone N differs from the row offset K1 of the first zone M.
  • FIG Figure 7 shows a schematic representation of a view X according to FIG Figure 6 .
  • the Figure 7 shows a section of the flat fittings 14 having a length F.
  • the wire hooks 28 pierced through the foundation 27 can be seen on the upper side of the flat fittings 14 with their backs 30 and on the lower side of the flat fittings 14 with their legs 29 forming their clothing tips 23. It can clearly be seen here that a clothing tip spacing D is not uniform over the length F of the flat clothing 14. This results from the different row offset K through the different zones.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
EP20152345.3A 2019-02-08 2020-01-17 Garniture de chapeau pour un chapeau marchant d'une carde Active EP3693498B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00155/19A CH715824A1 (de) 2019-02-08 2019-02-08 Deckelgarnitur für einen Wanderdeckel einer Karde.

Publications (2)

Publication Number Publication Date
EP3693498A1 true EP3693498A1 (fr) 2020-08-12
EP3693498B1 EP3693498B1 (fr) 2023-03-22

Family

ID=69177026

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20152345.3A Active EP3693498B1 (fr) 2019-02-08 2020-01-17 Garniture de chapeau pour un chapeau marchant d'une carde

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Country Link
US (1) US20200255983A1 (fr)
EP (1) EP3693498B1 (fr)
CN (1) CN111549402B (fr)
CH (1) CH715824A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH720658A1 (de) * 2021-10-23 2024-09-01 The Indian Card Clothing Company Ltd Flacher deckel für eine karde

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1176435A (fr) * 1957-07-11 1959-04-10 Joseph Deiss Ets Chapeau de carde
DE2617796A1 (de) * 1975-04-24 1976-11-04 Kanai Hiroyuki Kardenbeschlag
JPS5264822U (fr) * 1975-10-31 1977-05-13
EP0041076A1 (fr) 1980-05-29 1981-12-09 Graf & Cie. A.-G. Garniture de chapeau pour une carde
DE3318580A1 (de) * 1983-05-20 1984-11-22 Aktiebolaget Kardbeslag, Norrköping Kratzenbeschlag
EP0143174A2 (fr) 1983-09-29 1985-06-05 Graf & Cie. A.-G. Garniture de chapeau pour machines de cardage
EP0410296A1 (fr) * 1989-07-27 1991-01-30 Peter Wolters Ag Garniture de chapeau de carde
WO2018104836A1 (fr) 2016-12-05 2018-06-14 Lakshmi Card Clothing Mfg Co Pvt Ltd Chapeau de carde pour machine à carder
CN208235044U (zh) 2018-03-27 2018-12-14 光山白鲨针布有限公司 一种高支纱用活动盖板针布
CN109023605A (zh) * 2018-08-21 2018-12-18 金轮针布(江苏)有限公司 梳棉机用盖板针布条

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19708261B4 (de) * 1997-02-28 2010-08-12 TRüTZSCHLER GMBH & CO. KG Vorrichtung an einer Karde mit einer Speisewalze und mindestens einem Vorreißer
AUPP681098A0 (en) * 1998-10-30 1998-11-19 Commonwealth Scientific And Industrial Research Organisation Card wire, especially for doffers and workers
CN205205327U (zh) * 2015-05-11 2016-05-04 孙鹏子 不等齿密梳理针布
CH711367A1 (de) * 2015-07-31 2017-01-31 Rieter Ag Maschf Lagerung eines Flexibelbogens in einer Wanderdeckelkarde.

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1176435A (fr) * 1957-07-11 1959-04-10 Joseph Deiss Ets Chapeau de carde
DE2617796A1 (de) * 1975-04-24 1976-11-04 Kanai Hiroyuki Kardenbeschlag
JPS5264822U (fr) * 1975-10-31 1977-05-13
EP0041076A1 (fr) 1980-05-29 1981-12-09 Graf & Cie. A.-G. Garniture de chapeau pour une carde
DE3318580A1 (de) * 1983-05-20 1984-11-22 Aktiebolaget Kardbeslag, Norrköping Kratzenbeschlag
EP0143174A2 (fr) 1983-09-29 1985-06-05 Graf & Cie. A.-G. Garniture de chapeau pour machines de cardage
EP0410296A1 (fr) * 1989-07-27 1991-01-30 Peter Wolters Ag Garniture de chapeau de carde
WO2018104836A1 (fr) 2016-12-05 2018-06-14 Lakshmi Card Clothing Mfg Co Pvt Ltd Chapeau de carde pour machine à carder
CN208235044U (zh) 2018-03-27 2018-12-14 光山白鲨针布有限公司 一种高支纱用活动盖板针布
CN109023605A (zh) * 2018-08-21 2018-12-18 金轮针布(江苏)有限公司 梳棉机用盖板针布条

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Publication number Publication date
CN111549402A (zh) 2020-08-18
US20200255983A1 (en) 2020-08-13
EP3693498B1 (fr) 2023-03-22
CH715824A1 (de) 2020-08-14
CN111549402B (zh) 2023-11-14

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