US3911661A - Yarn friction false twist device - Google Patents

Yarn friction false twist device Download PDF

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Publication number
US3911661A
US3911661A US507299A US50729974A US3911661A US 3911661 A US3911661 A US 3911661A US 507299 A US507299 A US 507299A US 50729974 A US50729974 A US 50729974A US 3911661 A US3911661 A US 3911661A
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US
United States
Prior art keywords
discs
loop
yarn
strand
false twist
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.)
Expired - Lifetime
Application number
US507299A
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English (en)
Inventor
Geoffrey Naylor
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.)
Rieter Scragg Ltd
Ernest Scragg and Sons Ltd
Original Assignee
Ernest Scragg and Sons Ltd
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Application filed by Ernest Scragg and Sons Ltd filed Critical Ernest Scragg and Sons Ltd
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Publication of US3911661A publication Critical patent/US3911661A/en
Assigned to RIETER-SCRAGG LIMITED reassignment RIETER-SCRAGG LIMITED ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: E.S.S. (REALISATIONS) (MACCLESFIELD) LIMITED
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

  • Strand friction false twist device comprises three equiangularly spaced parallel shafts carrying respective U-S. sets of friction discs the discs of each set being over- Int. lapped those of other ets to provide a ig zag [58] Field Of Search 57/77.377.45,
  • a threading up mechanism has guide arms which lead a strand laterally into the device without the strand contacting those discs rotating in outward direction.
  • This invention relates to friction false twist devices of the kind in which a plurality of overlapping rotary discs are arranged on axes disposed about a strand path in such manner that the running strand contacts the rim of each disc in turn and is false twisted by being rotated by frictional contact with the moving rims as the discs rotate all in the same direction.
  • the strand is caused to travel over each disc rim at an angle inclined to the plane of rotation of the disc so that it is rotated with a substantially pure rolling motion on the disc rim, substantially without slip.
  • a typical device of the kind to which this invention relates comprises three parallel, equiangularly spaced shafts each having a set of three discs with rubber or polyurethane tyres or rims, all of equal radius and equally axially spaced, and arranged so that they overlap one another substantially when viewed axially.
  • the discs are so axially spaced and overlapped that a strand passing through the centre of the device follows a zigzag spiralling path and lies on the friction surface of each tyre at an angle to the direction of motion of the surface equal, or substantially equal, to the desired twist angle, and in this manner the pure rolling motion is achieved.
  • a friction false twist device of the kind referred to is provided with a threading-up mechanism having members about which can be releasably supported a bight or loop of running yarn which passes around the exterior of the sets of discs from end to end of the device, the mechanism also being provided with guide arms which extend towards the centre of the device between the respective shafts of two adjacent sets of discs, and are so located as to guide the bight or loop of yarn, when released from the support members, laterally inwardly between the two adjacent sets of discs without the yarn contacting that set having its disc rims moving outwardly.
  • the support members are mounted on a common pivotal support, and are movable together between an operative position, in which they support the bight or loop of yarn, and a release position in which the loop is freed to be guided into the device by the guide arms.
  • FIG. 1 is a perspective view of a friction false twist device and its threading-up mechanism, taken in the direction of the arrow A of FIG. 2.
  • FIG. 2 is a plan view of FIG. 1.
  • FIG. 3 is a similar view to FIG. 2 showing an alternative embodiment.
  • the friction false twist device comprises three parallel equiangularly spaced shafts 10,12 and 13 all driven to rotate in clockwise direction (as seen in plan view) by any suitable drive mechanism (not shown) such as belts and pulleys or wharves.
  • the respective shafts each carry a set of discs 14, 15, and 16 with rubber or polyurethane rims, all of equal radius and equally spaced, and arranged so that they overlap one another substantially, which can be seen most clearly when viewed axially as in FIG. 2. It will be seen that the discs 15 of shaft 12 lie between the discs 10 and 16 of shafts l0 and 13.
  • the discs may be ccramic material or ceramic-coated.
  • the axially spacing and degree of overlap of the discs provide that yarn running through the centre of the device, between two aligned and centrally located top and bottom guide eyes 17 and I8, follows a zig-zag spiralling path and lies on the friction surface of each disc rim at an angle equally, or substantially equal, to the desired twist angle to be inserted in the yarn.
  • a thread up mechanism which comprises two spaced support members 19, both projecting horizontally from a common upright mounting rod 20 which can be pivoted manually about its own axis on a base member 21, which base member could be secured to a machine frame (not shown) or be secured to or integral with the base plate 22 of the friction twist device itself.
  • the mounting rod 20 has a handle 23, and in the particular construction shown the rod 20 is tubular and pivots on a fixed shaft 24, and is adjustable axially by providing spacer sleeves 25 between the bottom end of the tubular rod 20 and the base member 21.
  • the purpose of the support members 19 is to releasably support a bight or loop of running yarn 26, shown in chain-dot lines in FIG. 1, as it runs between the top and bottom guides 17 and 18, with the loop passing around the exterior of the sets of discs 14 and 15 from end to end of the device, but the loop can be released from the supports by moving the handle 23 in the direction of the arrow B of FIG. 1.
  • the thread-up mechanism is also provided with three parallel guide arms 27 which extend towards the centre of the device between the respective shafts l and 12 of the two adjacent sets of discs 14 and 15, each arm being fixedly located to guide the loop of yarn 26 released from the support members 19 laterally inwardly between each of the three pairs of adjacent discs 14 and 15, without the yarn contacting any disc on its way into the centre.
  • the yarn loop 26 being seen at the upper side of an arm 27 located outside the zone encompassed by the rim of disc 15.
  • All the arms 27 are conveniently carried by a mounting tube 28 sleeved over an upright shaft 29 fixed to the base member 21, the tube 28 being movable about the shaft, for correct setting of the positioning of the guide arms 27, and being then lockable to the shaft by a set screw 30. Between the bottom end of the mounting tube 28 and the base member 21 are spacing washers 31 which provide for axial adjustment of the position of the mounting tube and hence the guide arms 27.
  • a simple indexing mechanism such as a ball catch can be provided for holding the support members 19 in the loop-forming position shown in the drawings.
  • the guide arms 27 and their mounting need not be of the exact construction described, for example the guide arms may be part of a comb-like member stamped from sheet metal.
  • guide arms and the support members need not be separate from one another, but may be integral with one another and afforded by two different edges of respective ones of several plates, one edge being a guide edge and the other a plain or notched support edge for the bight or loop, which is released manually from the support edges to engage the guide edges when threading up the device.
  • FIG. 3 of the drawings This arrangement is shown in FIG. 3 of the drawings, in which the base plate 22 supports an upright mounting rod 32 which preferably is rotatably adjustable for setting it and which carries a set of four aligned spaced plates 33 of generally triangular shape of which only the top plate is seen in FIG. 3.
  • the edge 34 of each plate acts as a guide arm in exactly the same manner as the guide anns 27 of FIGS. 1 and 2.
  • Another edge 35 of the plate acts as a stationary support member for the yarn loop 26, and can be plain as shown or can have a small notch which locates the loop positively before it is manually released onto the guide edge 34.
  • a strand friction false twist device comprising a plurality of rotary overlapping friction discs arranged in sets, a plurality of parallel equiangularly spaced shafts each mounting a respective set of discs to be rotated by the shafts all in the same direction of rotation, the discs being axially spaced on the shafts and from each other and overlapped to provide a zig-zag spiralling path for a strand running through the centre of the device and over the rims of the friction discs, the improvement which consists of providing a threading up mechanism comprising support members about which can be releasably supported a loop of running yarn extending about the exterior of the sets of discs from end to end of the device, guide arms, means mounting and positioning said guide arms for them to extend towards the centre of the device and between the shafts of two adjacent sets of discs so as to guide the loop of yarn when released from the support members laterally inwardly into the device between said two adjacent sets of discs without contacting that set having its rims moving outwardly
  • Strand friction false twist device as claimed in claim 1, and further comprising a common pivotal support which mounts said support members for movement together between an operative position, in which they support the loop of yarn, and a release position in which the loop is freed to be guided into the device by the guide arms.
  • Stand friction false twist device as claimed in claim 1, and further comprising means movably mounting said guide arms for correct setting of their positioning to guide the loop of yarn into the device.

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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)
  • Prostheses (AREA)
  • Treatment Of Fiber Materials (AREA)
US507299A 1973-09-19 1974-09-18 Yarn friction false twist device Expired - Lifetime US3911661A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4388573A GB1456655A (en) 1973-09-19 1973-09-19 Yarn friction false twist device

Publications (1)

Publication Number Publication Date
US3911661A true US3911661A (en) 1975-10-14

Family

ID=10430760

Family Applications (1)

Application Number Title Priority Date Filing Date
US507299A Expired - Lifetime US3911661A (en) 1973-09-19 1974-09-18 Yarn friction false twist device

Country Status (7)

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US (1) US3911661A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
JP (1) JPS5839932B2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CA (1) CA1001016A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
CH (1) CH571080A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR2244028B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB1456655A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
IT (1) IT1021488B (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4002018A (en) * 1975-04-18 1977-01-11 Heberlein Maschinenfabrik Ag Device for modifying the yarn wrap angle in a friction false-twist device
US4149366A (en) * 1976-12-14 1979-04-17 Bayer Aktiengesellschaft Threading method and threading devices for disc-type friction twisters
US4226080A (en) * 1978-06-01 1980-10-07 Kugelfischer Georg Schafer & Co. Loading device for false-twist apparatus
US4235071A (en) * 1979-03-05 1980-11-25 Barmag Barmer Maschinenfabrik Aktiengesellschaft Yarn false twist apparatus
US4301648A (en) * 1979-08-08 1981-11-24 Barmag Barmer Maschinenfabrik Ag Friction false twist apparatus having door mounted yarn thread-up
US4325213A (en) * 1979-08-08 1982-04-20 Barmag Barmer Maschinenfabrick Friction false twist apparatus having improved yarn thread-up capability
US4412412A (en) * 1979-09-01 1983-11-01 Fag Kugelfischer Georg Schafer & Co. Loading device for false-twist apparatus
US4481762A (en) * 1982-09-10 1984-11-13 Barmag Barmer Maschinenfabrik Ag Control for yarn false twisting apparatus
US4510744A (en) * 1982-06-01 1985-04-16 Rieter-Scragg Limited Apparatus for false twisting yarn
US5111648A (en) * 1989-07-27 1992-05-12 Devtex Apparatus for initiating the feed of yarn in a yarn processing machine

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH626665A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1978-03-03 1981-11-30 Rieter Ag Maschf
DE3419483A1 (de) * 1984-05-25 1985-11-28 FAG Kugelfischer Georg Schäfer KGaA, 8720 Schweinfurt Friktionsfalschdrallaggregat zum falschdrallen von textilen faeden
GB8525048D0 (en) * 1985-10-10 1985-11-13 Rieter Scragg Ltd False twisting apparatus
JPS6391645U (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1986-12-04 1988-06-14

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2923121A (en) * 1957-06-21 1960-02-02 Hobourn Aero Components Ltd Apparatus for imparting twists to yarns
US3287890A (en) * 1964-10-07 1966-11-29 Monsanto Co Apparatus for twisting yarn
US3762149A (en) * 1971-05-14 1973-10-02 Heberlein & Co Ag False-twist device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4531817Y1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1968-03-12 1970-12-05

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2923121A (en) * 1957-06-21 1960-02-02 Hobourn Aero Components Ltd Apparatus for imparting twists to yarns
US3287890A (en) * 1964-10-07 1966-11-29 Monsanto Co Apparatus for twisting yarn
US3762149A (en) * 1971-05-14 1973-10-02 Heberlein & Co Ag False-twist device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4002018A (en) * 1975-04-18 1977-01-11 Heberlein Maschinenfabrik Ag Device for modifying the yarn wrap angle in a friction false-twist device
US4149366A (en) * 1976-12-14 1979-04-17 Bayer Aktiengesellschaft Threading method and threading devices for disc-type friction twisters
US4226080A (en) * 1978-06-01 1980-10-07 Kugelfischer Georg Schafer & Co. Loading device for false-twist apparatus
US4235071A (en) * 1979-03-05 1980-11-25 Barmag Barmer Maschinenfabrik Aktiengesellschaft Yarn false twist apparatus
US4301648A (en) * 1979-08-08 1981-11-24 Barmag Barmer Maschinenfabrik Ag Friction false twist apparatus having door mounted yarn thread-up
US4325213A (en) * 1979-08-08 1982-04-20 Barmag Barmer Maschinenfabrick Friction false twist apparatus having improved yarn thread-up capability
US4412412A (en) * 1979-09-01 1983-11-01 Fag Kugelfischer Georg Schafer & Co. Loading device for false-twist apparatus
US4510744A (en) * 1982-06-01 1985-04-16 Rieter-Scragg Limited Apparatus for false twisting yarn
US4481762A (en) * 1982-09-10 1984-11-13 Barmag Barmer Maschinenfabrik Ag Control for yarn false twisting apparatus
US5111648A (en) * 1989-07-27 1992-05-12 Devtex Apparatus for initiating the feed of yarn in a yarn processing machine

Also Published As

Publication number Publication date
JPS5076364A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1975-06-23
DE2444530B2 (de) 1976-03-25
FR2244028A1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1975-04-11
JPS5839932B2 (ja) 1983-09-02
CA1001016A (en) 1976-12-07
IT1021488B (it) 1978-01-30
DE2444530A1 (de) 1975-04-03
GB1456655A (en) 1976-11-24
CH571080A5 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1975-12-31
FR2244028B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1980-03-14

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Legal Events

Date Code Title Description
AS Assignment

Owner name: RIETER-SCRAGG LIMITED, LANGLEY, MACCLESFIELD, CHES

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. AGAINST PATENTS ONLY;ASSIGNOR:E.S.S. (REALISATIONS) (MACCLESFIELD) LIMITED;REEL/FRAME:004183/0057

Effective date: 19830815