US3527043A - Means and process for producing a false twist by friction - Google Patents

Means and process for producing a false twist by friction Download PDF

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Publication number
US3527043A
US3527043A US788428A US3527043DA US3527043A US 3527043 A US3527043 A US 3527043A US 788428 A US788428 A US 788428A US 3527043D A US3527043D A US 3527043DA US 3527043 A US3527043 A US 3527043A
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United States
Prior art keywords
yarn
friction
false twist
textile
annular
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US788428A
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English (en)
Inventor
Louis E Sabaton
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Moulinage et Retorderie de Chavanoz SA
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Moulinage et Retorderie de Chavanoz SA
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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
    • 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
    • D02G1/0206—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 by false-twisting
    • D02G1/0266—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 by false-twisting false-twisting machines
    • 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

Definitions

  • Such an apparatus and process for creating a false twist therewith take advantage of a considerable peripheral diameter of the friction ring, a high rotational speed of such ring and a great ease in handling of the textile yarn.
  • the present invention is directed to novel apparatus and process for producing a false twist in a textile yarn through friction on a rotating element; more particularly, the present invention is directed to such an apparatus for creating a false twist on a textile yarn by friction wherein such apparatus takes into consideration at the same time the large peripheral diameter of a friction ring, a high rotational speed of such ring, and a great ease in handling of the textile yarn.
  • annular friction surfaces with large peripheral dimensions, therefore offering a good ratio between the inside diameter of the turning organ and the diameter of the textile yarn.
  • the taut yarn is applied against the inside peripheral surface of the turning organ and necessarily goes right through, changing direction. This process gives somewhat good results and makes it possible to texture yarns of small count at speeds greater than those of the standard frames of false twist by pins about which the yarn is wrapped.
  • complicated devices are necessary, such as those made up of a mobile ring or tube.
  • Such a tube is mounted with a friction roller, driven in rotation, inside a stationary fitting, by its outside surface, which necessarily limits the speed of rotation of this tube.
  • a further system illustrating such an apparatus for creating a false twist in a textile yarn is shown, for example, in French Pat. No. 1,158,478 in the name of British Nylon Spinners.
  • This French patent describes a turning tube having its ends convexly shaped internally, and covered with a material having a high friction factor, the tube or yarn guide being characterized and arranged so that the angles of entry and exit of the yarn fall be tween 45 and
  • this apparatus for creating a false twist in the textile yarn suffers from the same inherent deficiencies and disadvantages since the yarn is made to pass through the turning tube.
  • Such apparatus for producing a false twisting by friction comprises at least one annular friction surface in rotation on itself around a stationary axis, such annular friction surface being in contact at at least one point with a textile yarn in movement under tension, the apparatus being arranged so that the entry and exit sides of the textile yarn in the annular friction space are aligned.
  • Such apparatus additionally comprises means for guiding the textile yarn under tension to and from the annular friction surface, such means being located on the same side of the annular surface as the entry and exit of the textile yarn.
  • a further object of the present invention is to provide a novel device for false twisting by friction which combines efiiciency in the production of the false twist and ease of handling of the textile yarn.
  • a still further object of the present invention is to provide such novel apparatus for creating a false twist in a textile yarn by friction wherein such apparatus contains guiding means to guide the yarn under tension to and from the annular friction surface, such means being located on the same side with respect to the entry and exit sections of the textile yarn.
  • Yet a further object of the present invention is to provide an intermediate guiding means for said novel apparatus for providing a false twist on textile yarns by friction, such intermediate guiding means comprising means comprising two arms, staggered in relation to one another at a certain angle, and pivoting on a fixed support.
  • FIG. 1 is a diagrammatic representation of the false twist apparatus in accordance with the present invention and an intermediate system for guiding the textile yarn in such apparatus;
  • FIG. 2 represents a schematic view of a false twist frame employing the false twist apparatus of the present invention
  • FIG. 3 is a sectional view along line AA' of FIG. 2 showing the heating oven thereof;
  • FIG. 4 is a cross sectional view of the guiding element located ahead of the false twist apparatus.
  • a device or apparatus for creating a false twist by friction comprising at least one annular friction surface in rotation on itself around a stationary axis, in contact at at least one point with a yarn in movement under tension, the annular friction surface and false twist apparatus being so arranged that the entry and exit sides of the yarn in the annular friction space formed from the annular friction surface are aligned.
  • a device or apparatus for creating a false twist by friction comprising at least one annular friction surface in rotation on itself around a stationary axis, in contact at at least one point with a yarn in movement under tension, the annular friction surface and false twist apparatus being so arranged that the entry and exit sides of the yarn in the annular friction space formed from the annular friction surface are aligned.
  • Such an apparatus as will be described in more detail hereinafter, additionally contains means for guiding the yarn under tension to and from the annular friction surface, such means being located on the same side with respect to both the entry and exit plane of the yarn.
  • annular space the volume generated by the annular friction surface during its rotation.
  • the expression entry side of the yarn in the annular space is meant that side of the textile yarn passing into the annular space for the first time.
  • the expression exit side is meant to embrace that face which the yarn leaving this annular space upon exiting the false twist apparatus.
  • the process and apparatus of the present invention are characterized particularly in that the yarn enters and leaves on the same side of the annular space.
  • the apparatus or device of the present invention comprises, in. addition to the false twist device, means for guiding the yarn under tension to and from the annular friction surface or annular friction organ, such means being located on the same side with respect to the plane of entry and exit of the textile yarn and including means for intermediate guiding of the textile yarn making it possible to engage and guide the yarn in the annular space and to maintain it inside said space in contact with the friction organ.
  • the annular friction surface dis cussed above be circular in nature.
  • the false twist device employed in accordance with the present invention is composed of a turning tube, driven in rotation by a belt.
  • the tube is provided with a hollow end portion covered inside with a ring and a material having a high friction factor, such material being one which is not abrasive, however.
  • a material having a high friction factor can comprise a conventional re-inforced elastomer such as employed, for example, in conjunction with the previously described French patents dealing with the production of false twist through friction.
  • a material with a high friction factor but one which is not abrasive can comprise, for example, a rubber or polyurethane material, etc.
  • the means for intermediate guiding of the textile yarn is made up of a member comprising two arms, staggered in relation to one another at a certain angle, pivoting on a stationary support.
  • Each arm carries a passage eye for the yarn.
  • a first arm makes it possible to engage and guide the yarn in the annular space and to keep it inside said space in contact with the friction organ, the other arm making it possible to disengage the yarn from this annular space.
  • the first arm brings about the disengagement of the yarn from the annular space, the second arm serving only to guide the yarn.
  • this intermediate guiding means can also be made up of a simple or multiple arm moving inside the turning tube, particularly inside the annular space.
  • the novel device or apparatus of the present invention is generally not employed alone in the formation of the false twisted textile yarn but is employed as a single element in an entire system utilized to achieve a finished textile yarn product.
  • the novel false twisting device or apparatus of the present invention can be advantageously mounted on a frame in association with delivery means for the yarn, at least one means for fixing the curling associated with the textile yarn, means for guiding the yarn between such means for fixing the curling and the false twist assembly and finally, means for receiving the treated yarn. If, in fact, it is desired to obtain a fixed stretched yarn such frame mounting may additionally contain two means for fixing the curling arranged on both sides of the false twist device employed in accordance with the apparatus and process of the present invention.
  • this frame can be made up of two frames placed facing each other.
  • the yarns are guided from one frame to the other, in the upper part of the device at a height greater than that of the height of a man and/or below a platform located at the lower part of the frame but by making a suflicient space between this platform and the floor, for the installation of said yarn guiding elements.
  • a means for fixing the curling is that made up of an open oven such as that described in French Pat. 1,395,038.
  • the means for guiding between the heating oven and the false twist device can be made up of a channel whose cross section is in the form of a bow compass, i.e., in the form of a V whose point is replaced by an arc of more than 180.
  • the delivery means are made up, for example, of a creel from which the yarn is pulled by unwinding and by delivery rollers of any known type.
  • the receiving means are also of any known type.
  • Advantageously they are made up of devices giving directly usable windings, without special working, such as a long-path taking up device with driving by friction.
  • the present invention is additionally directed to the process of producing a false twist by friction, such as, for example, produced in accordance with the utilization of the above broadly described apparatus.
  • Such process comprises treating a thermoplastic textile yarn under tension and in movement by means of an annular friction surface in rotation on itself around a stationary axis and in contact with the textile yarn at at least one point.
  • Such a process is characterized in that the textile yarn passes into and out of the annular space on the same side thereof such that the yarn goes through the annular space defined by the rotating friction surface 2n times, n being a whole number that can be equal to zero.
  • the process of the present invention in accordance with the preferred embodiment is such that the directions of the yarn before and after the false twist device are substantially aligned.
  • FIG. 1 illustrates the novel false twisting apparatus or device in accordance with the present invention.
  • the device comprising a pin 1 made up of an annular portion 3 turning around an axis 5 which is driven by a belt 7.
  • the pin carries inside a ring 9 of material with a high friction factor but not abrasive such as a conventional polyurethane elastomer.
  • Means for handling the yarn and serving to guide the yarn in the pin and disengage it from the pin comprises a support carrying a double arm 13 mounted to rotate around a shaft 15.
  • Each arm 16 and 17 is provided with an eye 18 and 19, respectively, for the passage of the yarn.
  • This double arm is blocked in working position by a stop 21 and in its disengagement position by another stop 23.
  • the yarn passes into the annular space after passing over a return roller 51.
  • This coupled with the means to guide the arm in the annular space allows the yarn to contact the annular friction surface of friction ring 9 in at least one location.
  • the yarn Upon exiting pin 1 and the annular space provided by the rotation of the friction ring, the yarn passes on a second roller 52 which acts to pull the yarn away from the false twisting device. It can be seen from a review of FIG. 1 that the yarn enters and exits the annular space created by the rotation of the friction ring on the same side, that is, the yarn does not actually pass through the false twist device. This, .as indicated previously, provides an advantage associated with ease of yarn handling.
  • FIG. 2 illustrates an overall system employing the false twisting apparatus or device in accordance with the present invention.
  • a creel 32 associated with a frame 31 carries bobbins of yarn, such as bobbin 33 from which yarn 4 is unwound.
  • This is only a conventional feed system generally employed in the feeding of yarns for the false twisting and similar devices. It is, of course, obvious that it would not be beyond the scope of the present invention to replace such conventional feeding system with any other type of feeding system generally utilized.
  • Yarn 4 then passes into a tension device 35 which can be of any known type, such as a grill or cup tension device, then on a guide 36. It then goes through the space separating the two frames 31 and 37, at a sufiicient height not to block passage of the walk between the two frames.
  • a tension device 35 which can be of any known type, such as a grill or cup tension device
  • Yarn 4 goes into a second frame 37 by a guide 38 and is pulled by a delivery system 49, then it goes into an oven 40.
  • Oven 40 is made up of a device such as that described in French Pat. 1,395,038. It presents particularly an open section such as that shown by FIG. 3.
  • the yarn passes into a slot 41 and can be introduced or removed at any moment through orifice 42.
  • the oven is provided with a, safety system (see FIG. 1) which, in case of interruption of the power, causes the pivoting of a cover 43 and an open return section 44 which removes the yarn from the heating plate 45.
  • the yarn passes into an open return section 44 then goes into a shaped metal channel 47 whose section has the shape shown in FIG. 4.
  • the length of this metal channel 47 is suflicient to permit a certain cooling of the yarn. It is advantageously between 50 cm. and 1.50 m.
  • the yarn then goes into a false twist device 1 according to the present invention. Before going into the device for false twist by friction according to the present invention (FIG. 1), the yarn passes over a return roller 51.
  • the yarn After exiting the false twist device 1, the yarn then passes on a second roller 52 and is pulled from device 1 by a second delivery system 53 which regulates its speed in the device. Then it goes back across the passageway separating the two frames at a suflicient height not to block the passage of an operator and is received on frame 1 on the guiding system made up of one or more guides such as 54 and 55.
  • the yarn is then wound on a device 56 such as a butterfly thread guide driven in a back and forth movement which distributes the yarn on support 57 driven tangentially by a spindle 58.
  • the pressure of support 57 is constantly exerted with the increase of the height of the winding, thanks to an arm 59 pivoting around a stationary axis 60 and sliding at its free end on a stationary arm 61, thanks to an element 62, with a spring and eccentric clack, permitting arm 59 to move on stationary arm 61 only in a counterclockwise direction.
  • the process and apparatus or device of the present invention provides numerous advantages over conventional devices employed for false twisting by friction.
  • the fact that the yarn does not have to travel axially through the turning tube makes it possible to achieve very high production speeds, the driving of the turning tube not having necessarily to take place on its outside peripheral portion.
  • high rotating speeds are easier to attain since the device or apparatus of the present invention does not require operational disengagement to effect a handling of the yarn and is mounted very simply and in a particularly efiicient manner.
  • it was necessary in accordance with prior art devices to completely stop the rotational movement of the twisting device in the case of the stopping, handling, or breaking of yarn. This is not required in accordance with the apparatus or process of the present invention.
  • all that is required is to disengage the yarn by swinging or sliding of the intermediate guide means in a manner which does not involve any disengagement of the entire system.
  • the present invention is characterized by a considerable improvement in the speed of fabrication of textured yarns and by an appreciable reduction in installation costs.
  • a textured yarn is made of yarn of ethylene polyterephthalate 45 deniers, 22 strands under the following operating conditions:
  • this example illustrates that in accordance with the present invention it is possible to produce textured yarns utilizing very high winding speeds. Moreover, in accordance with the examples, it was determined that the handling of the yarn could be conducted in a very simple and economic manner since disengagement of the pin is unnecessary in that the textile yarn does not pass actually through the same.
  • Apparatus for creating a false twist in a textile yarn by friction comprising false twisting means comprising at least one annular friction surface rotating about a fixed axis and means for guiding a textile yarn to and from the annular space formed by the rotation of said anular friction surface, said means for guiding the textile yarn being located on the same side of said annular friction surface with respect to both the entrance and exit sections of the yarn guided through said apparatus, the yarn being in contact with said annular friction surface at least at one point thereof.
  • said guiding means includes intermediate guiding means effecting the engagement and guiding of the yarn in said annular space and in contact with said annular friction surface.
  • said intermediate guiding means comprises two arms, staggered in relation to one another and pivotable around a fixed axis, each arm having an eye for engagement of said textile yarn.
  • Said intermediate guiding means comprises a single or multiple arm moving inside a turning tube.
  • said false twisting means comprises a turning tube having a hollowed end portion.
  • a false twist means comprising at least one annular friction surface rotating about a fixed axis and means for guiding a textile yarn to and from the annular space formed by the rotation of said annular friction surface, said means for guiding the textile yarn being located on the same side of said annular friction surface as both the entrance and exit sections of the yarn guided through said apparatus, the yarn being in contact with said annular friction surface at least at one point thereof.
  • a process of texturing a textile yarn by the creation of a false twist by friction of a thermoplastic yarn under tension and in motion which process comprises passing said textile yarn in contact at at least one point with an annular friction surface of a false twist means in rotation on itself around a stationary axis, said process being characterized on that said yarn passes 211 times through an annular space defined by said friction surface in rotation, 11 being an integer of 0 or more.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
US788428A 1968-01-05 1969-01-02 Means and process for producing a false twist by friction Expired - Lifetime US3527043A (en)

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US (1) US3527043A (ja)
AT (1) AT316366B (ja)
BE (1) BE726338A (ja)
BR (1) BR6805263D0 (ja)
CH (2) CH519037A (ja)
DE (1) DE1900098C3 (ja)
ES (1) ES362118A1 (ja)
FR (1) FR1568036A (ja)
GB (1) GB1197703A (ja)
SE (1) SE344478B (ja)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3664110A (en) * 1970-04-03 1972-05-23 Electrospin Corp Sliding radially-clamping gripper
US3685273A (en) * 1969-03-28 1972-08-22 Moulinage Et Retroderie De Cha Method and apparatus for false twisting textile yarns and product obtained thereby
US3695026A (en) * 1970-08-06 1972-10-03 Fiber Industries Inc Flange false twist textured nylon
US3701245A (en) * 1970-09-10 1972-10-31 Lessona Corp Friction twisting unit
US3724196A (en) * 1970-05-28 1973-04-03 Celanese Corp High speed texturing of synthetic continuous filament yarn
JPS4935650A (ja) * 1972-08-11 1974-04-02
US3802175A (en) * 1971-03-08 1974-04-09 Ici Ltd Apparatus and process for producing twist in textile yarns
US3869853A (en) * 1972-03-07 1975-03-11 Ici Ltd Friction bush
US3994123A (en) * 1973-10-10 1976-11-30 Turbo Machine Company Friction twisting head
US4008560A (en) * 1975-03-07 1977-02-22 Heberlein Maschinenfabrik Ag Threading device for a false-twist texturing machine without upper structure
US4012895A (en) * 1973-07-24 1977-03-22 Bayer Aktiengesellschaft False-twisting arrangement for synthetic yarns
CN110760956A (zh) * 2018-07-23 2020-02-07 株式会社丰田自动织机 环锭式纺纱机的钢领/钢丝圈系统

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2175093A1 (en) * 1972-03-07 1973-10-19 Ici Ltd False twist bush - having friction surface with shore hardness of greater than thirty at ambient temp

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2718111A (en) * 1951-06-25 1955-09-20 Clemson Agricultural College O Yarn twister for spinning frames
US2936567A (en) * 1955-07-19 1960-05-17 British Nylon Spinners Ltd Twisting of textile filaments
GB850079A (en) * 1957-02-14 1960-09-28 British Nylon Spinners Ltd Improvements in or relating to the production of stretch yarns
US3029591A (en) * 1956-08-23 1962-04-17 Sydney & E Scragg Ltd Twisting of textile yarns
US3066473A (en) * 1960-03-23 1962-12-04 Maeda Yutaka Apparatus and method for imparting twist and crimp to textile yarns
US3114231A (en) * 1960-02-26 1963-12-17 Novivlas Nv Method and apparatus for the manufacture of bast fibre yarn
US3166881A (en) * 1963-07-22 1965-01-26 Chavanoz Moulinage Retorderie Apparatus and process for the manufacture of highly crimped yarns by false twist

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2718111A (en) * 1951-06-25 1955-09-20 Clemson Agricultural College O Yarn twister for spinning frames
US2936567A (en) * 1955-07-19 1960-05-17 British Nylon Spinners Ltd Twisting of textile filaments
US3029591A (en) * 1956-08-23 1962-04-17 Sydney & E Scragg Ltd Twisting of textile yarns
GB850079A (en) * 1957-02-14 1960-09-28 British Nylon Spinners Ltd Improvements in or relating to the production of stretch yarns
US3114231A (en) * 1960-02-26 1963-12-17 Novivlas Nv Method and apparatus for the manufacture of bast fibre yarn
US3066473A (en) * 1960-03-23 1962-12-04 Maeda Yutaka Apparatus and method for imparting twist and crimp to textile yarns
US3166881A (en) * 1963-07-22 1965-01-26 Chavanoz Moulinage Retorderie Apparatus and process for the manufacture of highly crimped yarns by false twist

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3685273A (en) * 1969-03-28 1972-08-22 Moulinage Et Retroderie De Cha Method and apparatus for false twisting textile yarns and product obtained thereby
US3664110A (en) * 1970-04-03 1972-05-23 Electrospin Corp Sliding radially-clamping gripper
US3724196A (en) * 1970-05-28 1973-04-03 Celanese Corp High speed texturing of synthetic continuous filament yarn
US3695026A (en) * 1970-08-06 1972-10-03 Fiber Industries Inc Flange false twist textured nylon
US3701245A (en) * 1970-09-10 1972-10-31 Lessona Corp Friction twisting unit
US3802175A (en) * 1971-03-08 1974-04-09 Ici Ltd Apparatus and process for producing twist in textile yarns
US3869853A (en) * 1972-03-07 1975-03-11 Ici Ltd Friction bush
JPS4935650A (ja) * 1972-08-11 1974-04-02
JPS515099B2 (ja) * 1972-08-11 1976-02-17
US4012895A (en) * 1973-07-24 1977-03-22 Bayer Aktiengesellschaft False-twisting arrangement for synthetic yarns
US3994123A (en) * 1973-10-10 1976-11-30 Turbo Machine Company Friction twisting head
US4008560A (en) * 1975-03-07 1977-02-22 Heberlein Maschinenfabrik Ag Threading device for a false-twist texturing machine without upper structure
CN110760956A (zh) * 2018-07-23 2020-02-07 株式会社丰田自动织机 环锭式纺纱机的钢领/钢丝圈系统
CN110760956B (zh) * 2018-07-23 2022-07-19 株式会社丰田自动织机 环锭式纺纱机的钢领/钢丝圈系统

Also Published As

Publication number Publication date
DE1900098A1 (de) 1969-07-24
BR6805263D0 (pt) 1973-01-02
CH534750A (fr) 1973-04-30
FR1568036A (ja) 1969-05-23
GB1197703A (en) 1970-07-08
BE726338A (ja) 1969-05-29
AT316366B (de) 1974-05-15
DE1900098C3 (de) 1974-11-07
CH1944768A4 (ja) 1972-11-30
SE344478B (ja) 1972-04-17
CH519037A (fr) 1972-02-15
ES362118A1 (es) 1970-12-01

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