US3412192A - Process of advancing heated yarn through free-running nip rolls under low tension - Google Patents

Process of advancing heated yarn through free-running nip rolls under low tension Download PDF

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Publication number
US3412192A
US3412192A US365743A US36574364A US3412192A US 3412192 A US3412192 A US 3412192A US 365743 A US365743 A US 365743A US 36574364 A US36574364 A US 36574364A US 3412192 A US3412192 A US 3412192A
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United States
Prior art keywords
yarn
filaments
yarns
roll
rolls
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Expired - Lifetime
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US365743A
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English (en)
Inventor
Clapson Brian Edward
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British Nylon Spinners Ltd
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British Nylon Spinners Ltd
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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
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
    • D01D10/04—Supporting filaments or the like during their treatment
    • D01D10/0436—Supporting filaments or the like during their treatment while in continuous movement
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/20—Formation of filaments, threads, or the like with varying denier along their length

Definitions

  • the present invention concerns improvements in or relating to the treatment of yarns and filaments by pressure rolls.
  • the process of the invention is modified by the provision of a further roll positioned downstream, for instance, of the pressure rolls and to one side of a line projected from the yarn path leading straight, i.e. tangentially, into the nip of said rolls, said third roll being driven by the yarn and itself driving one of the pressure rolls through gearing connecting it therewith.
  • the yarns or filaments are in that case threaded-up through the nip of the pressure rolls and around part, at least, of the periphery of the third roll which is driven by the forward movement of the yarns or filaments imparted thereto by e.g. the wind up mechanism, and such third roll itself drives one of the pressure rolls through gearing.
  • Such a threading-up method entails the loss of yarn heat prior to the pressure rolling, unless the pressure rolls are themselves heated; and naturally, as the extent of deformation of the filaments is dependent on their temperature at the time of rolling, any threading-up which involves the loss of heat previously imparted is not wholly to be recommended.
  • the increased angle of contact as such can be obtained merely by deflecting the yarn path around a stationary guide member after rolling.
  • the benefit of the increased angle is likely to be lost by reason of an increase both in wind-up tension and in tension immediately after emergence from the nip, the latter increase being chiefly responsible for the fraying or tearing effect on the yarns or filaments.
  • replacement of such stationary guide member merely by an idler roller to be driven by the yarn, but itself not driving the one pressure roll, does not overcome the latter tension increase.
  • the appearance of the fabric is altered in a way that can be quite desirable, being the novelty effect known as crackiness, i.e. having randomly distributed short lines of a darker nature interspersed between the areas of regular nature, in the Warp and/ or weft directions of a woven fabric.
  • twistless yarns pressure-rolled according to the invention may be used in the welts of stockings; and then the pressure-rolling can be carried out as an intermediary step of the coning process, before being wound-up by the coning mechanism.
  • FIGURE 1 is a general arrangement diagram illustrating the process of the invention:
  • FIGURE 2 is a perspective view of a yarn heater and of a preferred embodiment of apparatus according to the invention.
  • FIGURE 3 is a diagram of an alternative threading-up in apparatus according to the invention.
  • FIGURE 4 is a diagram of a further alternative threading-up in apparatus according to the invention.
  • yarn Y is withdrawn over the top end of supply bobbin 1, by virtue of the winding action of a ring-spindle wind-up comprising rotating spindle 3, traversing ring 5, traveller 7, wind-up bobbin 9 and balloon guide 11.
  • the yarn Y passes upwardly through guide 13 and thence around the periphery of tension-imparting means 15, which imparts a low tension to the yarn.
  • the yarn is drawn through the nip of freely-rotatable pressure rolls 21, 23, and wrapped partly around the periphery of roll 23 before being changed in direction around a portion of the periphery of a third freely-rtatable roll 25.
  • Rolls 23 and 25 are interconnected by gearing 27.
  • the yarns direction is again altered, downwardly, through guide 29.
  • the forward motion of the yarn in contact with the periphery of roll 25 imparts rotary motion to it, which in turn is transmitted via the gearing to roll 23.
  • the forward motion of the yarn is responsible for driving the rolls 21, 23, as the rotary motion of roll 23 is imparted directly to roll 21 by contact of their peripheries through the yarn moving therebetween.
  • FIGURE 2 the embodiment of the apparatus, as shown more diagrammatically in FIGURE 1, consists of roll 21 fixedly mounted on freely-rotatable shaft 22, roll 23 fixedly mounted on freely-rotatable shaft 24, and roll 25 fixedly mounted on freely-rotatable shaft 26. Shafts 24 and 26 are interconnected by gearing 27. Not shown in this drawing are the means whereby roll 23 is loaded to press its periphery against that of roll 21. Such means may be of the type described and illustrated in the specification and drawings of the aforementioned British patent specification 936,284. Heater plate 17 is mounted upstream of the rolling mill apparatus.
  • FIGURE 3 a threading-up of the yarn in a manner that will drive the pressure rolls is shown which requires no other means.
  • the yarn is passed around the underside of roll 21, thence backwardly through the nip between rolls 21 and 23, and then around the upper side of roll 23.
  • FIGURE 4 a threading-up employing a freely-rotatable roller or stationary pin 28 downstream of pressure rolls 21 and 23 is shown.
  • the yarn passes directly from the heater 17 into the nip of the rolls 21, 23, thence around a portion of the periphery of roll 23 before being turned in direction around roller or pin 28.
  • the yarns were rolled singly in a process such as that illustrated in FIGURE 1.
  • the yarns were of polyhexamethylene adipamide, and contained only such small amount of twist, e.g. of /2 turn per inch, as is customarily inserted by the manufacturer at the completion of the drawing process.
  • the yarn of denier/68 filaments was withdrawn at 100 feet/ minute from its supply package by rotation of a take-up bobbin, and a tension of 1 gram was applied by a tensioning device positioned immediately upstream of a contact heater plate.
  • the yarn was passed in contact with the heater plate, which was electrically heated just above C., and then immediately passed between the nip of stainless steel pressure rolls to which a load of 68 pounds was applied.
  • the yarn was deflected from its straight line path to pass partly around and to drive a third (unloaded) stainless steel roll, whose rotational movement was geared to drive the upper one of the pressure rolls.
  • the yarn was then wound up on the bobbin at a low tension.
  • the process was similar but the supply yarn was of 45 denier/ 15 filaments, and the speed of rolling was 500 feet/minute.
  • the tension applied was 3 grams, and the temperature of the yarn at rolling was 200 C.
  • the load applied was 68 pounds, as before; and it resulted in a mean aspect ratio of the filaments of 1.25.
  • fabric woven from the respective yarns in both warp and weft had a drier, soften handle and better covering power (i.e. greater opacity) than control fabrics woven from yarns that were otherwise similar, but had circular cross-section filaments.
  • a process for treating yarns and filaments comprising the steps of (a) advancing the yarn or filament to cause it to travel towards wind-up means;
  • a process as in claim 1 wherein the yarn is substantially twistless multifilament yarn of polyhexamethylene adipamide and wherein said heating step heats said yarn to a temperature between 180 C. and 200 C.
  • a process for treating yarn of denier below about 45 and winding the yarn into a package which comprises: advancing the yarn by a wind-up means; imparting a low tension to the travelling yarn; heating the tensioned, travelling yarn; immediately thereafter passing the heated yarn through the nip of freely-rotatable pressure rolls; eliminating fraying or tearing of the yarn by driving a nonpressure roll through engagement of the travelling yarn with the periphery of said non-pressure roll and by mechanically driving one of said pressure rolls from said non-pressure roll; and winding up the yarn without further treatment thereof with pressure rolls.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Treatment Of Fiber Materials (AREA)
US365743A 1963-05-17 1964-05-07 Process of advancing heated yarn through free-running nip rolls under low tension Expired - Lifetime US3412192A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB19677/63A GB1000030A (en) 1963-05-17 1963-05-17 Improvements in or relating to the treatment of yarns and filaments by pressure rolls

Publications (1)

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US3412192A true US3412192A (en) 1968-11-19

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US365743A Expired - Lifetime US3412192A (en) 1963-05-17 1964-05-07 Process of advancing heated yarn through free-running nip rolls under low tension

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US (1) US3412192A (enrdf_load_stackoverflow)
BE (1) BE648050A (enrdf_load_stackoverflow)
CH (1) CH412186A (enrdf_load_stackoverflow)
GB (1) GB1000030A (enrdf_load_stackoverflow)
LU (1) LU46095A1 (enrdf_load_stackoverflow)
NL (1) NL6405267A (enrdf_load_stackoverflow)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3496715A (en) * 1968-02-23 1970-02-24 Joseph Fitton Filament and method of forming same
US3500628A (en) * 1964-09-14 1970-03-17 American Enka Corp Torque yarn
US3528235A (en) * 1968-02-23 1970-09-15 Joseph Fitton Apparatus for processing elongated filaments
US3594881A (en) * 1968-05-21 1971-07-27 Thiokol Chemical Corp Process for delustering synthetic ribbon yarns
US4026492A (en) * 1975-09-29 1977-05-31 Xerox Corporation Ribbon tension control means
US4302920A (en) * 1979-11-21 1981-12-01 Lantech Inc. Film web drive stretch wrapping apparatus and process
US5226435A (en) * 1991-08-01 1993-07-13 Gillette Canada Inc. Flavored dental floss and method
US5284169A (en) * 1992-05-15 1994-02-08 Gillette Canada, Inc. Method of producing a thin brush dental floss
US5501734A (en) * 1992-02-06 1996-03-26 Gillette Canada, Inc. Yarn coating assembly and applicator
US5526831A (en) * 1993-11-12 1996-06-18 Gillette Canada, Inc. Dental floss manufacturing process and product
US5558901A (en) * 1994-05-26 1996-09-24 Gillette Canada, Inc. Floss yarn bulking assembly and method
US5755243A (en) * 1996-06-27 1998-05-26 Gillette Canada, Inc. Dental floss with thermoplastic coating
US5845652A (en) * 1995-06-06 1998-12-08 Tseng; Mingchih M. Dental floss
US5904152A (en) * 1995-06-06 1999-05-18 Gillette Canada Inc. Dental floss
US6027592A (en) * 1995-06-06 2000-02-22 Gillette Canada Inc. Dental floss

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2738144A (en) * 1952-06-25 1956-03-13 Honig Frank Textile package
US2932077A (en) * 1952-06-25 1960-04-12 Honig Frank Apparatus for stressing strand materials
GB913882A (en) * 1960-09-17 1962-12-28 British Nylon Spinners Ltd Improvements in or relating to the crimping of yarns and filaments
FR1350801A (fr) * 1962-12-18 1964-01-31 Machine perfectionnée pour le craquage de fibres synthétiques en ruban
US3196602A (en) * 1962-05-11 1965-07-27 British Nylon Spinners Ltd Crimping synthetic thermoplastic yarns

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2738144A (en) * 1952-06-25 1956-03-13 Honig Frank Textile package
US2932077A (en) * 1952-06-25 1960-04-12 Honig Frank Apparatus for stressing strand materials
GB913882A (en) * 1960-09-17 1962-12-28 British Nylon Spinners Ltd Improvements in or relating to the crimping of yarns and filaments
US3196602A (en) * 1962-05-11 1965-07-27 British Nylon Spinners Ltd Crimping synthetic thermoplastic yarns
FR1350801A (fr) * 1962-12-18 1964-01-31 Machine perfectionnée pour le craquage de fibres synthétiques en ruban

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3500628A (en) * 1964-09-14 1970-03-17 American Enka Corp Torque yarn
US3496715A (en) * 1968-02-23 1970-02-24 Joseph Fitton Filament and method of forming same
US3528235A (en) * 1968-02-23 1970-09-15 Joseph Fitton Apparatus for processing elongated filaments
US3594881A (en) * 1968-05-21 1971-07-27 Thiokol Chemical Corp Process for delustering synthetic ribbon yarns
US4026492A (en) * 1975-09-29 1977-05-31 Xerox Corporation Ribbon tension control means
US4302920A (en) * 1979-11-21 1981-12-01 Lantech Inc. Film web drive stretch wrapping apparatus and process
US5357990A (en) * 1991-08-01 1994-10-25 Gillette Canada Inc. Flavored dental floss and process
US5226435A (en) * 1991-08-01 1993-07-13 Gillette Canada Inc. Flavored dental floss and method
US5501734A (en) * 1992-02-06 1996-03-26 Gillette Canada, Inc. Yarn coating assembly and applicator
US5284169A (en) * 1992-05-15 1994-02-08 Gillette Canada, Inc. Method of producing a thin brush dental floss
US5505216A (en) * 1992-05-15 1996-04-09 Gillette Canada Inc. Thin floss brush
US5526831A (en) * 1993-11-12 1996-06-18 Gillette Canada, Inc. Dental floss manufacturing process and product
US5558901A (en) * 1994-05-26 1996-09-24 Gillette Canada, Inc. Floss yarn bulking assembly and method
US5780099A (en) * 1994-05-26 1998-07-14 Gillette Canada, Inc. Floss yarn bulking assembly and method
US5845652A (en) * 1995-06-06 1998-12-08 Tseng; Mingchih M. Dental floss
US5904152A (en) * 1995-06-06 1999-05-18 Gillette Canada Inc. Dental floss
US6027592A (en) * 1995-06-06 2000-02-22 Gillette Canada Inc. Dental floss
US5755243A (en) * 1996-06-27 1998-05-26 Gillette Canada, Inc. Dental floss with thermoplastic coating

Also Published As

Publication number Publication date
GB1000030A (en) 1965-08-04
NL6405267A (enrdf_load_stackoverflow) 1964-11-18
LU46095A1 (enrdf_load_stackoverflow) 1972-01-01
CH412186A (de) 1966-04-30
BE648050A (enrdf_load_stackoverflow)

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