US3777467A - Apparatus for false-twisting multifilament threads and the like - Google Patents

Apparatus for false-twisting multifilament threads and the like Download PDF

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Publication number
US3777467A
US3777467A US00272629A US3777467DA US3777467A US 3777467 A US3777467 A US 3777467A US 00272629 A US00272629 A US 00272629A US 3777467D A US3777467D A US 3777467DA US 3777467 A US3777467 A US 3777467A
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United States
Prior art keywords
roller
false
friction members
combination
rotary friction
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Expired - Lifetime
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US00272629A
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English (en)
Inventor
H Enneking
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Savio SpA
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Industrie Werke Karlsruhe Ausburg AG
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Assigned to OFFICINE SAVIO S.P.A. reassignment OFFICINE SAVIO S.P.A. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: INDUSTRIE-WERKE KARLSRUHE AKTIENGESELLSCHAFT
Assigned to SAVIO SPA reassignment SAVIO SPA CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: OFFICINE SAVIO SPA
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    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
    • D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
    • D02G1/04—Devices for imparting false twist
    • D02G1/08—Rollers or other friction causing elements
    • D02G1/082—Rollers or other friction causing elements with the periphery of at least one disc

Definitions

  • a first false-twisting unit includes three axially parallel shafts of which two carry pairs of cooperating rotary friction members defining respective nips through which the travelling yarn passes for false-twisting and on a third of which a driven friction-drive roller is provided to drive the friction members.
  • a second falsetwisting unit includes a first roller coaxial with the friction-drive roller having an axial length substantially greater than the rotary friction members, and a second roller rotatably mounted in axial parallelism with the first roller and engaging the latter with its periphery to form with the first roller a second nip through which the travelling yarn passes to have a final false twist imparted to it and have its filaments moved into mutual parallelism.
  • An arrangement is provided for traversing the second roller axially along the second roller.
  • the present invention relates generally to the false twisting of multi-filament threads, yarns and the like, and more particularly to apparatus forcarrying out such false-twisting.
  • the yarn which word will be used hereafter to designate any kind of thread, filament or the like which is to be false twisted, is heated and thereupon passes through the nip between peripheries of cooperating pairs of the discs or the like. This imparts a false twist to the yarn as the latter is travelling out of and away from the heating device, in such a manner that the terminal pair of discs causes false twist to run in the direction towards the heating arrangement, that is opposite to the advancement of the yarn.
  • the yarn changes, as it leaves the terminal pair of discs (that is the final pair by which it is engaged) from twisted condition into a condition in which the individual filaments or capillary fibers of the yarn move to a condition of parallelism.
  • the thread performs, with respect to the final pair of rollers engaging it, not a rolling movement but a sliding frictional movement, with the resultthat the final pair of discs is subjected to very high wear.
  • Another prior-art apparatus for false-twisting purposes utilizes an axially relatively long roller whose periphery is covered with synthetic plastic material.
  • a counter roller of lesser axial length and having a low coefficient of friction is pressed against the circumference of the longer roller, to form a nip therewith.
  • the two rollers rotate in mutually opposite directions, but at least one of them is traversed axially with respect to the other.
  • a heating arrangement is again provided and the yarn to be false twisted travels out of the heating arrangement and into and through the nip defined by the rollers, to be given a twist which runs back in the direction towards the heating arrangement.
  • the filaments or fibers are again oriented in parallelism with one another clue to the traversing between the two rollers the point of contact between the two rollers, that is the location of the nip, constantly changes which results in a significant reduction of the wear on the rollers due to friction, simply because the friction at the point of contact, that is in the nip, changes from rolling friction to sliding friction.
  • this apparatus which thus provides an improvement in the undesirable high wear previously encountered, is
  • his an object of the present invention to provide an improved false-twisting apparatus which affords the advantages of the two aforemen tioned prior-art apparatuses, but eliminates their disadvantages.
  • one feature of the invention resides, in an apparatus for false-twisting travelling filamentary threads and the like, in a combination comprising a first false-twisting unit and a second falsetwisting unit.
  • the first false-twisting unit includes three axially parallel shafts, pairs of cooperating rotary friction members provided on two of the shafts and forming respective first nips through which the travelling yarn passes to have a preliminary false twist imparted to it, and a driven friction-drive roller on the third of the shafts in driving engagement with the peripheries of the rotary friction members.
  • the second false-twisting unit includes a first roller coaxial with the friction-drive roller and having an axial length substantially greater than the rotary friction members, a second roller rotatably mounted in axial parallelism with the first roller and having a periphery engaging that of said first roller and forming a second nip through which the travelling yarn passes to have a final false-twist imparted to it and to have its filaments moved into mutual parallelism, and traversing means traversing the second roller axially along the first roller.
  • the present invention utilizes a combination of the .two approaches characteristic of the two aforementioned prior-art apparatuses. In so doing, however, it does not incorporate the disadvantages of these apparatuses but instead eliminates them.
  • the first falsetwisting unit produces a highly twisted thread and the second false-twisting unit receives this thread and without any difficulties, and particularly without any undesirably or unacceptably high degree of wear of the rollers, imparts to the: filaments or fibers of the thread the necessary or desired condition of parallelism.
  • FIG. 1 is a somewhat diagrammatic side view illustrating an embodiment of the invention.
  • FIG. 2 is a top plan view of FIG. 1.
  • the thread to be false twisted which may be a monofilament, or a multifilament thread, yarn or the like, is designated with reference numeral 1.
  • threads which are to be false twisted are of synthetic plastic material but this is not necessarily the case and no limitation to such a concept is intended.
  • the thread is advanced first to the first false-twisting unit which is designated with reference numeral 2, and from the false-twisting unit 2 it goes to the false-twisting unit 4.
  • the false-twisting unit 2 essentially comprises three parallel shafts 2a, 2b and 2c. Axially adjacent one another and mounted on the shaft 2a are a friction disc 2d, a supporting or counter disc 2e and another friction disc 2f. These discs have freedom of rotation with respect to their shaft 2a. Another counter disc 2g, friction disc 2h and counter disc 2i are also rotatably mounted, axially adjacent one another on the shaft 20. Each of the friction disc forms a pair with one of the counter discs, and vice versa. The discs of each pair are in frictional engagement with their respective peripheries forming a nip through which the yarn 1 must pass.
  • the various discs are driven by a friction rollers 3 which is fixedly mounted on a shaft 2b driven in suitable manner for instance by a non-illustrated electromotor which is too well known to require detailed discussion. Motion is transmitted to the discs by engagement of the periphery of friction roller 3 with the discs 2d, 2f and 2h provided on the shafts 2a and 2c.
  • the filament l is heated in a heating arrangement which is not illustrated, being known per se, and advances into the nips between the pairs of friction and counter discs, of the false-twisting unit 2, being given a false twist 1a which runs back through the heating arrangement to the thread or yarn supply which is not illustrated.
  • the thread now advances in its travel through the false-twisting unit 4 which is essentially composed of a friction roller 4a cooperating with a disc or second roller 4b, the two rollers engaging one another with their peripheries to form an additional nip.
  • the axial length of the roller 4a is substantially greater than that of the discs mounted on the shafts 2a and 20, because the roller 4b is to be traversed axially of the roller 40 and the large peripheral surface provided by the greater axial length of the roller 4a is therefore needed.
  • the shaft of the friction roller 4a be of one piece with, or be connected in motion transmitting relationship, the shaft 2b of the friction roller 3.
  • the shaft of the friction roller 4a can be a separate shaft and can be driven by a separate drive, if desired.
  • the peripheries of the discs and the rollers are constituted of or covered with an appropriate material, preferably on a polyurethane basis, which affords the desired coefficient of friction.
  • an appropriate material preferably on a polyurethane basis, which affords the desired coefficient of friction.
  • Such materials are for instance commercially available under the trade name Vulkollan.
  • the thread 1 having the twist 1a arrives in the false-twisting unit 4, it is given another twist, but in opposite direction in this instance, In other words, the thread leaves the unit 4 slightly above the point of contact or nip between the rollers 4a and 4b which point is designated with reference character x in untwisted'condition in which its filaments or capillary fibers lb are completely or substantially in parallelism with one another. These filaments 1b then advance to a non-illustrated take-up which is not part of the invention.
  • the filament or thread 1 leaves the final pair of rollers 2f, 2i of the unit 2 in a straight-line path, that is that it moves in a straight path out of the nip between them, thus having minimum contact with the peripheries of these rollers and causing minimum wear of these peripheries.
  • minimum wear is caused on the peripheries of the rollers of the unit 4 because of the constant change of the location of the nip due to the traversing of the roller 4b (indicated by the double-headed arrow in FIGS. 1 and 2) along the roller 4a, a relative motion, which incidentally could of course be reversed,
  • Means for traversing the roller 4b have been diagrammatically illustrated by the double-headed arrow, the shaft on which the roller 4b is mounted and the box showing such mounting; they are conventional and known per se and therefore not believed to require detailed illustration.
  • a combination comprising a first false-twisting unit including three axially parallel shafts, pairs of cooperating rotary friction members provided on two of said shafts and forming respective first nips through which the travelling yarn passes to have a preliminary false twist imparted to it, and a driven friction-drive roller on the third of said shafts in driving engagement with the peripheries of said rotary friction members; and a second false-twisting unit including a first roller coaxial with said friction-drive roller and having an axial length substantially greater than said rotary friction members, a second roller rotatably mounted in axial parallelism with said first roller and having a periphery engaging that of said first roller and forming a second nip through which the travelling yarn passes to have a final twist imparted to it and to have its filaments moved into mutual parallelism, and traversing means traversing said second roller axially along said first roller.
  • said first roller includes a mounting shaft which is axially aligned with said third shaft.
  • pairs of rotary friction members include a terminal pair; and wherein said second unit is arranged so that the yarn travels in a substantially straight path from the first nip of said terminal pair to said second nip formed by said first and second rollers.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
US00272629A 1972-03-22 1972-07-17 Apparatus for false-twisting multifilament threads and the like Expired - Lifetime US3777467A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2213851A DE2213851C2 (de) 1972-03-22 1972-03-22 Vorrichtung zum Falschzwirnen von insbesondere synthetischen Fäden od. dgl. mittels Friktionsgetrieben

Publications (1)

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US3777467A true US3777467A (en) 1973-12-11

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US00272629A Expired - Lifetime US3777467A (en) 1972-03-22 1972-07-17 Apparatus for false-twisting multifilament threads and the like

Country Status (10)

Country Link
US (1) US3777467A (enrdf_load_stackoverflow)
JP (1) JPS496238A (enrdf_load_stackoverflow)
CH (1) CH533701A (enrdf_load_stackoverflow)
DD (1) DD97679A5 (enrdf_load_stackoverflow)
DE (1) DE2213851C2 (enrdf_load_stackoverflow)
FI (1) FI51113C (enrdf_load_stackoverflow)
FR (1) FR2177265A5 (enrdf_load_stackoverflow)
GB (1) GB1369722A (enrdf_load_stackoverflow)
IT (1) IT963309B (enrdf_load_stackoverflow)
NL (1) NL7207896A (enrdf_load_stackoverflow)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3854276A (en) * 1972-10-31 1974-12-17 Marzoli F & C Spa False twister device
US3872661A (en) * 1972-09-08 1975-03-25 Scragg & Sons Textile apparatus
US3901011A (en) * 1973-02-12 1975-08-26 Kugelfischer G Schaefer & Co False twisting apparatus
US3910025A (en) * 1973-02-12 1975-10-07 Oda Gosen Kogyo Kk False-twisting apparatus for producing crimps in filament yarns
US4002017A (en) * 1974-06-28 1977-01-11 Weinz Ernst A Friction member for a mistwisting apparatus
CN102839453A (zh) * 2012-08-22 2012-12-26 陈子瑜 单锭驱动轮盘假捻纺纱的装置
CN103088484A (zh) * 2011-10-31 2013-05-08 上海市毛麻纺织科学技术研究所 环锭细纱机的组合式摩擦假捻器装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2227910A (en) * 1938-10-10 1941-01-07 Celanese Corp Twist tube
US2855750A (en) * 1956-05-14 1958-10-14 American Enka Corp Thread twisting device
US2928229A (en) * 1954-08-10 1960-03-15 Valco Machine Co Apparatus for treating textiles
US3233398A (en) * 1963-09-13 1966-02-08 Klinger Mfg Co Ltd High speed driving transmissions for spindles
US3313096A (en) * 1963-04-19 1967-04-11 Societex Devices for driving bodies revolving at high speeds, and in particular false twist spindles in crimping machines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2227910A (en) * 1938-10-10 1941-01-07 Celanese Corp Twist tube
US2928229A (en) * 1954-08-10 1960-03-15 Valco Machine Co Apparatus for treating textiles
US2855750A (en) * 1956-05-14 1958-10-14 American Enka Corp Thread twisting device
US3313096A (en) * 1963-04-19 1967-04-11 Societex Devices for driving bodies revolving at high speeds, and in particular false twist spindles in crimping machines
US3233398A (en) * 1963-09-13 1966-02-08 Klinger Mfg Co Ltd High speed driving transmissions for spindles

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3872661A (en) * 1972-09-08 1975-03-25 Scragg & Sons Textile apparatus
US3854276A (en) * 1972-10-31 1974-12-17 Marzoli F & C Spa False twister device
US3901011A (en) * 1973-02-12 1975-08-26 Kugelfischer G Schaefer & Co False twisting apparatus
US3910025A (en) * 1973-02-12 1975-10-07 Oda Gosen Kogyo Kk False-twisting apparatus for producing crimps in filament yarns
US4002017A (en) * 1974-06-28 1977-01-11 Weinz Ernst A Friction member for a mistwisting apparatus
CN103088484A (zh) * 2011-10-31 2013-05-08 上海市毛麻纺织科学技术研究所 环锭细纱机的组合式摩擦假捻器装置
CN102839453A (zh) * 2012-08-22 2012-12-26 陈子瑜 单锭驱动轮盘假捻纺纱的装置

Also Published As

Publication number Publication date
FI51113B (enrdf_load_stackoverflow) 1976-06-30
NL7207896A (enrdf_load_stackoverflow) 1973-09-25
JPS496238A (enrdf_load_stackoverflow) 1974-01-19
DD97679A5 (enrdf_load_stackoverflow) 1973-05-12
DE2213851C2 (de) 1974-01-17
GB1369722A (en) 1974-10-09
FI51113C (fi) 1976-10-11
FR2177265A5 (enrdf_load_stackoverflow) 1973-11-02
DE2213851B1 (de) 1973-06-14
CH533701A (de) 1973-02-15
IT963309B (it) 1974-01-10

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AS Assignment

Owner name: OFFICINE SAVIO S.P.A., ITALY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:INDUSTRIE-WERKE KARLSRUHE AKTIENGESELLSCHAFT;REEL/FRAME:004087/0471

Effective date: 19821116

Owner name: OFFICINE SAVIO S.P.A., VIA UDINE 105, 33170 PORDEN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:INDUSTRIE-WERKE KARLSRUHE AKTIENGESELLSCHAFT;REEL/FRAME:004087/0471

Effective date: 19821116

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Owner name: SAVIO SPA, ITALY

Free format text: CHANGE OF NAME;ASSIGNOR:OFFICINE SAVIO SPA;REEL/FRAME:005452/0763

Effective date: 19871012

Owner name: SAVIO SPA

Free format text: CHANGE OF NAME;ASSIGNOR:OFFICINE SAVIO SPA (CHANGED TO);REEL/FRAME:005452/0763

Effective date: 19871012