EP2519666B1 - Draft device of a drafting machine or a lap-forming machine - Google Patents

Draft device of a drafting machine or a lap-forming machine Download PDF

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Publication number
EP2519666B1
EP2519666B1 EP10801272.5A EP10801272A EP2519666B1 EP 2519666 B1 EP2519666 B1 EP 2519666B1 EP 10801272 A EP10801272 A EP 10801272A EP 2519666 B1 EP2519666 B1 EP 2519666B1
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EP
European Patent Office
Prior art keywords
opening cylinder
opening
downstream
cylinder
sliver
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Active
Application number
EP10801272.5A
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German (de)
French (fr)
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EP2519666A1 (en
Inventor
Girolamo Prandini
Roberto Torcoli
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.)
Marzoli Machines Textile SRL
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Marzoli SpA
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Publication of EP2519666A1 publication Critical patent/EP2519666A1/en
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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G27/00—Lap- or sliver-winding devices, e.g. for products of cotton scutchers, jute cards, or worsted gill boxes
    • 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
    • D01H5/22—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by rollers only
    • D01H5/24—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by rollers only with porcupines or like pinned rotary members
    • 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
    • D01H5/84—Porcupines

Definitions

  • the present invention relates to a draft device of a drafting machine or lap-farming machine on a spinning line for processing fibre and obtaining a yarn.
  • a textile plant for transforming fibre flocks into yarn is composed of numerous machines, which clean the fibres and position them in parallel to obtain fibre webs and finally the yarn.
  • the plant usually comprises a plurality of cans in which a sliver of fibre is contained, coming from carding machines, and a lap-forming machine, in which the individual slivers are joined, drafted and overlapped, forming a web, wound to form a lap.
  • the process also comprises a drafting machine in which the slivers are drafted only before moving on for subsequent processing.
  • Drafting is in both cases performed by a draft device.
  • the aim of the present invention is to make a draft device which increases the efficacy of the drafting.
  • reference numeral 1 globally denotes a draft device, such as a drafting machine or lap-forming machine, fed with a plurality of slivers S.
  • the draft device comprises a draft unit 2 able to draft the slivers S.
  • the draft unit 2 comprises at least two pairs of drafting cylinders, positioned one downstream of the other, having different peripheral speeds, and in particular such that the peripheral speed of the downstream pair is greater than the peripheral speed of the upstream pair.
  • the sliver S passing between the pairs of drafting cylinders, is drafted thanks to the difference in the peripheral speeds.
  • the ratio of the peripheral speed of the downstream pair of drafting cylinders to the peripheral speed of the upstream pair of drafting cylinders is defined as "draft". Increasing draft values correspond to a more energetic draft action, that is to say increased lengthening of the sliver.
  • the draft unit 2 comprises:
  • a first pair of drafting cylinders 4 formed of a lower cylinder 4a and an upper pressure cylinder 4b;
  • the draft device 1 further comprises an opening unit 10 positioned upstream of the draft unit 2 suitable to open the slivers S before proceeding towards the draft unit 2, by means of opening elements suitable to get into the individual sliver.
  • the opening unit 10 is suitable to work on slivers S so as to open them, to reduce their compactness, by means of insertion of said opening elements.
  • the individual slivers S have an approximately elliptical section and occupy a substantially rectangular area R, when considered all together.
  • the opening unit By means of the opening unit, the opening elements penetrate the slivers and open them, according to insertion lines L such that each portion has a substantially homogenous density compared to the density of the other portions, between one insertion line and the next.
  • the opening unit 10 comprises at least one main opening cylinder 12, provided with a channelled surface 14, so as to forcibly channel the slivers and thereby separate them from other fibres, opening the sliver.
  • the cylinder 12 which is rotatable around a rotation axis X transversal to the feed direction of the slivers, has a plurality of circumferential bosses 16 on the surface, in axial succession.
  • a channel 18 is formed between one boss and the next in which the fibres, combined in laps, are channeled.
  • the pitch of the bosses of the opening cylinder 12 is preferably less than the average transversal width of the slivers, so that the bosses, which act as the opening elements in such variation, can get into the fibres of the sliver.
  • the bosses are circumferentially continuous.
  • the bosses are discontinuous, in other words made as a succession of protruding teeth; according to a further embodiment, the opening elements are defined by a plurality of tips or blades, able to sink into the sliver.
  • the opening elements are positioned axially to form a cylindrical helix, continuous or interrupted in parts.
  • the opening unit 10 comprises a downstream opening cylinder 20, positioned downstream of the main opening cylinder 12.
  • the opening cylinders 12, 20 are positioned so that the sliver in transit between the main opening cylinder 12 and the downstream opening cylinder 20, follows a downward path; this way the sliver S transits over the top of the main opening cylinder, deviates downwards and transits over the bottom of the downstream opening cylinder 20.
  • the draft device 1 Downstream of the downstream opening cylinder 20, the draft device 1 comprises a support bar 30, positioned so that its upper surface, which the sliver S rests on in transit, is substantially at the height of the aperture of the first pair of drafting cylinders 4, and at a greater height than the bottom of the surface of the downstream opening cylinder 20.
  • the sliver follows an uphill path, as far. as the support bar 30, to then enter the draft unit 2.
  • this makes it possible to create a tension of the moving sliver which pushes it downwards towards the surface of the main opening cylinder 12 and upwards onto the surface of the downstream opening cylinder 20, intensifying the channelling effect.
  • the opening unit 10 comprises an upstream opening cylinder 40, positioned upstream of the main opening cylinder 12 ( figures 4 and 4a ).
  • the upstream opening cylinder 40 has structural and functional features similar to those of the main opening cylinder 12.
  • the opening cylinders 12, 20, 40 are non-motorised. According to further embodiments, the opening cylinders 12, 20, 40 are motorised according to yet further embodiments, some opening cylinders are motorised and some are not.
  • this makes it possible to regulate the speed of rotation of the cylinders, so as to regulate the speed in relation to the slivers and thereby optimise the channelling action.
  • the opening cylinders are made in lightweight aluminium alloy, so as to reduce rotation inertia.
  • the density of the opening elements increases from high to low.
  • the main opening cylinder 12 has a denser pattern of circumferential bosses along its axis than the upstream opening cylinder 40 and the downstream opening cylinder 20 has a denser pattern of circumferential bosses along its axis than the main opening cylinder 12.
  • the progression of the density of bosses makes it possible to progressively dose the aggressiveness of the opening effect.
  • the opening unit comprises overlapping opening cylinders, in other words cylinders the circumferential bosses of which penetrate each other at least partially ( figures 5 , 6 and 7 ).
  • the circumferential bosses of one opening cylinder position themselves inside the ideal cylindrical surface formed by the subsequent bosses of the coupled cylinder, between the valley formed between one boss and the next.
  • a co-penetrating cylinder opening unit comprises a lower opening cylinder 12' and an upper opening cylinder 12", for example with the same axial pitch between consecutive circumferential bosses.
  • the circumferential bosses of one opening cylinder are in phase with the circumferential bosses of the overlapping opening cylinder, so that the top of a boss of one opening cylinder corresponds to the bottom of a valley of the other opening cylinder ( figures 5 and 7 ).
  • circumferential bosses of one opening cylinder are out of phase with the circumferential bosses of the overlapping opening cylinder, so that the top of a boss of one opening cylinder corresponds to the sloping side of the other opening cylinder ( figure 6 ).
  • the overlapping cylinders have a different pitch.
  • the overlapping opening cylinders have opening elements with a cylindrical helical shape, continuous or interrupted in parts, wherein the two helixes have opposite winding directions, so as to balance the axial shift effect on the slivers processed.
  • the drafting machine or lap-forming machine comprises a support surface 50, upstream of the opening unit 10, inclined downwardly in the direction of advancement of the slivers.
  • the drafting machine or lap-forming machine comprises a plurality of deviation elements 52, which occupy a deviation region of the support surface 50, projecting from it, near the entrance rim.
  • the deviation elements 52 are preferably positioned in a herringbone pattern so as to reduce the width of the flanked group of slivers.
  • the deviation elements 52 composed of blocks in a parallelepiped shape with rounded corners, comprise a tip element 52a, positioned substantially in contact with the entrance rim of the surface 50, and side elements 52b, flanking the tip element 52a, which move further away from the entrance rim as they approach the sides of the surface 50.
  • the deviation elements 52 are positioned so as to be transversally distanced and form ducts between which the slivers are channelled into, transversally delimited by said elements 52.
  • the drafting machine or lap-forming machine further comprises a substantially horizontal end surface 60 downstream of the support surface 50, immediately downstream of which the opening unit 10 is positioned.
  • the drafting machine or lap-forming machine comprises aspiration devices able to aspirate dirt or the like from the slivers as they pass.
  • said aspiration devices comprise through slots which go through the thickness of the end surface 60.
  • the draft device according to the present invention makes it possible to improve the drafting of the slivers so that these reach the draft unit already opened.
  • Accentuated opening of the slivers corresponds to an accentuated opening of the fibres and therefore better adhesion of the same, thereby improving drawing.
  • the uphill and downward path of the slivers makes it possible to intrinsically push the slivers onto the channelling surfaces, accentuating the effect of the opening unit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Description

  • The present invention relates to a draft device of a drafting machine or lap-farming machine on a spinning line for processing fibre and obtaining a yarn.
  • A textile plant for transforming fibre flocks into yarn is composed of numerous machines, which clean the fibres and position them in parallel to obtain fibre webs and finally the yarn.
  • The plant usually comprises a plurality of cans in which a sliver of fibre is contained, coming from carding machines, and a lap-forming machine, in which the individual slivers are joined, drafted and overlapped, forming a web, wound to form a lap.
  • One embodiment of a production line with cans and lap-forming machine is described in the document EP-A1-1464739 in the Applicant's name. Other examples are disclosed in GB-A-1460236 , WO-A-90/08211 and JP-A-561102425 .
  • Usually, the process also comprises a drafting machine in which the slivers are drafted only before moving on for subsequent processing.
  • Drafting is in both cases performed by a draft device.
  • The aim of the present invention is to make a draft device which increases the efficacy of the drafting.
  • Such purpose is achieved by a draft device made according to claim 1.
  • The characteristics and advantages of the draft device according to the present invention will be evident from the description below, offered by way of a non-limiting example, with reference to the appended figures, in which:
    • figure 1 is a schematic side view of a draft device according to the present invention;
    • figure 1a schematically shows the action of an opening unit according to the present invention;
    • figure 2 shows an axonometric view of the draft device in figure 1;
    • figure 3 shows an opening unit of the draft device according to the present invention, according to one embodiment ;
    • figure 4 shows a schematic side view of a draft device according to a further embodiment of the present invention;
    • figure 4a shows an opening unit of the draft device in figure 4;
    • figures 5, 6, and 7 shows further embodiments of an opening unit according to the present invention.
  • with reference to the appended drawings, reference numeral 1 globally denotes a draft device, such as a drafting machine or lap-forming machine, fed with a plurality of slivers S.
  • The draft device comprises a draft unit 2 able to draft the slivers S.
  • The draft unit 2 comprises at least two pairs of drafting cylinders, positioned one downstream of the other, having different peripheral speeds, and in particular such that the peripheral speed of the downstream pair is greater than the peripheral speed of the upstream pair. The sliver S, passing between the pairs of drafting cylinders, is drafted thanks to the difference in the peripheral speeds. The ratio of the peripheral speed of the downstream pair of drafting cylinders to the peripheral speed of the upstream pair of drafting cylinders is defined as "draft". Increasing draft values correspond to a more energetic draft action, that is to say increased lengthening of the sliver.
  • According to the embodiment shown, the draft unit 2 comprises:
  • - a first pair of drafting cylinders 4, formed of a lower cylinder 4a and an upper pressure cylinder 4b;
  • - a second pair of drafting cylinders 6, formed of a lower cylinders 6a and un upper pressure cylinders 6b;
  • - a third pair of drafting cylinders 8, formed of a lower cylinder 8a and said upper pressure cylinder 6b, which is therefore common to the second and third pair.
  • The draft device 1 further comprises an opening unit 10 positioned upstream of the draft unit 2 suitable to open the slivers S before proceeding towards the draft unit 2, by means of opening elements suitable to get into the individual sliver.
  • In other words, the opening unit 10 is suitable to work on slivers S so as to open them, to reduce their compactness, by means of insertion of said opening elements.
  • Schematically as shown in figure 1a, the individual slivers S have an approximately elliptical section and occupy a substantially rectangular area R, when considered all together. By means of the opening unit, the opening elements penetrate the slivers and open them, according to insertion lines L such that each portion has a substantially homogenous density compared to the density of the other portions, between one insertion line and the next.
  • According to the invention, the opening unit 10 comprises at least one main opening cylinder 12, provided with a channelled surface 14, so as to forcibly channel the slivers and thereby separate them from other fibres, opening the sliver.
  • For example, the cylinder 12, which is rotatable around a rotation axis X transversal to the feed direction of the slivers, has a plurality of circumferential bosses 16 on the surface, in axial succession. A channel 18 is formed between one boss and the next in which the fibres, combined in laps, are channeled.
  • The distance between one boss and the next axially abreast boss is defined as "pitch".
  • The pitch of the bosses of the opening cylinder 12 is preferably less than the average transversal width of the slivers, so that the bosses, which act as the opening elements in such variation, can get into the fibres of the sliver.
  • According to the embodiment shown, the bosses are circumferentially continuous.
  • According to embodiment variations, the bosses are discontinuous, in other words made as a succession of protruding teeth; according to a further embodiment, the opening elements are defined by a plurality of tips or blades, able to sink into the sliver.
  • According to yet a further embodiment the opening elements are positioned axially to form a cylindrical helix, continuous or interrupted in parts.
  • According to the invention the opening unit 10 comprises a downstream opening cylinder 20, positioned downstream of the main opening cylinder 12.
  • The opening cylinders 12, 20 are positioned so that the sliver in transit between the main opening cylinder 12 and the downstream opening cylinder 20, follows a downward path; this way the sliver S transits over the top of the main opening cylinder, deviates downwards and transits over the bottom of the downstream opening cylinder 20.
  • Downstream of the downstream opening cylinder 20, the draft device 1 comprises a support bar 30, positioned so that its upper surface, which the sliver S rests on in transit, is substantially at the height of the aperture of the first pair of drafting cylinders 4, and at a greater height than the bottom of the surface of the downstream opening cylinder 20.
  • In other words, after the downstream opening cylinder 20, the sliver follows an uphill path, as far. as the support bar 30, to then enter the draft unit 2.
  • Advantageously, this makes it possible to create a tension of the moving sliver which pushes it downwards towards the surface of the main opening cylinder 12 and upwards onto the surface of the downstream opening cylinder 20, intensifying the channelling effect.
  • According to a further embodiment the opening unit 10 comprises an upstream opening cylinder 40, positioned upstream of the main opening cylinder 12 (figures 4 and 4a). The upstream opening cylinder 40 has structural and functional features similar to those of the main opening cylinder 12.
  • According to a preferred embodiment the opening cylinders 12, 20, 40 are non-motorised. According to further embodiments, the opening cylinders 12, 20, 40 are motorised according to yet further embodiments, some opening cylinders are motorised and some are not.
  • Advantageously, this makes it possible to regulate the speed of rotation of the cylinders, so as to regulate the speed in relation to the slivers and thereby optimise the channelling action.
  • According to one embodiment the opening cylinders are made in lightweight aluminium alloy, so as to reduce rotation inertia.
  • According to one embodiment moreover, wherever several opening cylinders are foreseen, the density of the opening elements, for example the number of circumferential bosses per unit of length of the relative opening cylinder, increases from high to low. For example, the main opening cylinder 12 has a denser pattern of circumferential bosses along its axis than the upstream opening cylinder 40 and the downstream opening cylinder 20 has a denser pattern of circumferential bosses along its axis than the main opening cylinder 12.
  • Advantageously, the progression of the density of bosses makes it possible to progressively dose the aggressiveness of the opening effect.
  • According to a further embodiment the opening unit comprises overlapping opening cylinders, in other words cylinders the circumferential bosses of which penetrate each other at least partially (figures 5, 6 and 7).
  • In other words, the circumferential bosses of one opening cylinder position themselves inside the ideal cylindrical surface formed by the subsequent bosses of the coupled cylinder, between the valley formed between one boss and the next.
  • For example, a co-penetrating cylinder opening unit comprises a lower opening cylinder 12' and an upper opening cylinder 12", for example with the same axial pitch between consecutive circumferential bosses.
  • According to a first embodiment the circumferential bosses of one opening cylinder are in phase with the circumferential bosses of the overlapping opening cylinder, so that the top of a boss of one opening cylinder corresponds to the bottom of a valley of the other opening cylinder (figures 5 and 7).
  • According to a further embodiment the circumferential bosses of one opening cylinder are out of phase with the circumferential bosses of the overlapping opening cylinder, so that the top of a boss of one opening cylinder corresponds to the sloping side of the other opening cylinder (figure 6).
  • According to yet a further embodiment, the overlapping cylinders have a different pitch.
  • According to a further embodiment, the overlapping opening cylinders have opening elements with a cylindrical helical shape, continuous or interrupted in parts, wherein the two helixes have opposite winding directions, so as to balance the axial shift effect on the slivers processed.
  • Preferably, moreover, the drafting machine or lap-forming machine comprises a support surface 50, upstream of the opening unit 10, inclined downwardly in the direction of advancement of the slivers.
  • In addition, the drafting machine or lap-forming machine comprises a plurality of deviation elements 52, which occupy a deviation region of the support surface 50, projecting from it, near the entrance rim. The deviation elements 52 are preferably positioned in a herringbone pattern so as to reduce the width of the flanked group of slivers.
  • In other words, the deviation elements 52, composed of blocks in a parallelepiped shape with rounded corners, comprise a tip element 52a, positioned substantially in contact with the entrance rim of the surface 50, and side elements 52b, flanking the tip element 52a, which move further away from the entrance rim as they approach the sides of the surface 50.
  • The deviation elements 52 are positioned so as to be transversally distanced and form ducts between which the slivers are channelled into, transversally delimited by said elements 52.
  • The drafting machine or lap-forming machine further comprises a substantially horizontal end surface 60 downstream of the support surface 50, immediately downstream of which the opening unit 10 is positioned.
  • According to a preferred embodiment, the drafting machine or lap-forming machine comprises aspiration devices able to aspirate dirt or the like from the slivers as they pass.
  • For example, said aspiration devices comprise through slots which go through the thickness of the end surface 60.
  • Innovatively, the draft device according to the present invention makes it possible to improve the drafting of the slivers so that these reach the draft unit already opened.
  • Accentuated opening of the slivers corresponds to an accentuated opening of the fibres and therefore better adhesion of the same, thereby improving drawing.
  • Advantageously, moreover, the uphill and downward path of the slivers makes it possible to intrinsically push the slivers onto the channelling surfaces, accentuating the effect of the opening unit.
  • It is clear that a person skilled in the art may make modifications to the draft device described above so as to satisfy contingent requirements.

Claims (9)

  1. Draft device (1) of a drafting machine or lap-forming machine of a spinning line, comprising:
    - a draft unit (2) able to draft an incoming sliver (S); and
    - an opening unit (10) positioned upstream of the draft unit (2), comprising
    a main opening cylinder (12) provided with opening elements suitable to get into the incoming sliver (S) to open it, wherein said opening elements form a channelled surface (14) for channelling portions of the sliver (S); characterized in that
    the opening unit (10) comprises a downstream opening cylinder (20) , positioned downstream of the main opening cylinder (12), structurally and functionally similar to it, the top of the main opening cylinder (12) and the top of the downstream opening cylinder (20) being at different heights
    so that the sliver in transit between the main opening cylinder (12) and the downstream opening cylinder (20) follows a downward path and transits over the top of the main opening cylinder (12), deviates downwards and transits over the bottom of the downstream opening cylinder (20);
    and in that the draft device (1) comprises a support bar (30) downstream of the downstream opening cylinder (20), having an upper surface, which the sliver (S) rests on in transit, so that after the downstream opening cylinder (20) the sliver (S) follows an uphill path and then enters the draft unit (2).
  2. Device according to claim 1, wherein the main opening cylinder (12) and the downstream opening cylinder (20) are rotatable.
  3. Device according to claim 1 or 2, wherein said opening elements are circumferential bosses (16).
  4. Device according to claim 3, wherein said bosses (16) are in axial succession.
  5. Device according to any of the preceding claims, wherein the opening unit (10) comprises an upward opening cylinder (40), positioned upward of the main opening cylinder (12), structurally and functionally similar to it.
  6. Device according to claim 5, wherein the top of the main opening cylinder (12) and the top of the upward opening cylinder (40) are at different heights, so as to form an uphill path of the sliver in the direction of advancement.
  7. Device according to claims 3 or 4 or claims 5 or 6 when dependent from claim 3, wherein the main opening cylinder (12) has a lower density of bosses (16) than the downstream opening cylinder (20).
  8. Device according to claims 5 to 7 when dependent from claim 3, wherein the upward opening cylinder (40) has a lower density of bosses (16) than the main opening cylinder (12).
  9. Device according to any of the previous claims, wherein the main opening cylinder (12) or the downstream opening cylinder (20) are made in lightweight aluminium alloy.
EP10801272.5A 2009-12-28 2010-11-23 Draft device of a drafting machine or a lap-forming machine Active EP2519666B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBS2009A000237A IT1397140B1 (en) 2009-12-28 2009-12-28 IRONING DEVICE OF A STRAIGHT MILLER OR OF A STRAIGHTENER.
PCT/IB2010/055373 WO2011080611A1 (en) 2009-12-28 2010-11-23 Draft device of a drafting machine or a lap - forming machine

Publications (2)

Publication Number Publication Date
EP2519666A1 EP2519666A1 (en) 2012-11-07
EP2519666B1 true EP2519666B1 (en) 2014-06-25

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Application Number Title Priority Date Filing Date
EP10801272.5A Active EP2519666B1 (en) 2009-12-28 2010-11-23 Draft device of a drafting machine or a lap-forming machine

Country Status (5)

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EP (1) EP2519666B1 (en)
CN (1) CN102695826B (en)
BR (1) BR112012015915B1 (en)
IT (1) IT1397140B1 (en)
WO (1) WO2011080611A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56165023A (en) * 1980-05-22 1981-12-18 Nakagawa Seisakusho:Kk High drafting method and apparatus capable of sliver ending
JPS61102425A (en) * 1984-10-19 1986-05-21 Aichi Boseki Kk Zigzag sliver drafter
WO1990008211A1 (en) * 1989-01-23 1990-07-26 National Research Development Corporation Preparation of fibres for spinning

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB717664A (en) * 1950-02-22 1954-11-03 Arthur Bonser An improvement in or relating to the elimination of impurities from textile fibres
FR2277163A1 (en) * 1974-07-03 1976-01-30 Alsacienne Constr Meca IMPROVEMENT IN HEDGEHOG TEXTILE FIBER STRETCHING DEVICES
DE2613210C3 (en) * 1976-03-27 1979-02-01 Staedtler & Uhl, 8540 Schwabach Needle roller with pinstripe
JPS5865014A (en) * 1981-10-13 1983-04-18 Takehisa Kato Porcupine roller apparatus in spinning frame
ATE407239T1 (en) * 2003-04-04 2008-09-15 Marzoli Spa COTTON WRAP MACHINE AND METHOD

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56165023A (en) * 1980-05-22 1981-12-18 Nakagawa Seisakusho:Kk High drafting method and apparatus capable of sliver ending
JPS61102425A (en) * 1984-10-19 1986-05-21 Aichi Boseki Kk Zigzag sliver drafter
WO1990008211A1 (en) * 1989-01-23 1990-07-26 National Research Development Corporation Preparation of fibres for spinning

Also Published As

Publication number Publication date
EP2519666A1 (en) 2012-11-07
IT1397140B1 (en) 2013-01-04
CN102695826A (en) 2012-09-26
BR112012015915A2 (en) 2016-06-21
CN102695826B (en) 2015-08-05
WO2011080611A1 (en) 2011-07-07
ITBS20090237A1 (en) 2011-06-29
BR112012015915B1 (en) 2020-11-17

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