US3579765A - Method of opening crimped yarn - Google Patents

Method of opening crimped yarn Download PDF

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Publication number
US3579765A
US3579765A US750596A US3579765DA US3579765A US 3579765 A US3579765 A US 3579765A US 750596 A US750596 A US 750596A US 3579765D A US3579765D A US 3579765DA US 3579765 A US3579765 A US 3579765A
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US
United States
Prior art keywords
yarn
relaxation
frictional force
crimped
opening
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
US750596A
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English (en)
Inventor
Jannes Eshuis
Horatius Tjebbes
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.)
ALGLMENE KUNSTZIJDE UNIE NV
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ALGLMENE KUNSTZIJDE UNIE NV
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Application filed by ALGLMENE KUNSTZIJDE UNIE NV filed Critical ALGLMENE KUNSTZIJDE UNIE NV
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Publication of US3579765A publication Critical patent/US3579765A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • D02G1/002—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by knitting, weaving or tufting, fixing and then unravelling

Definitions

  • This invention relates to the manufacture of opened and crimped yarn and, more particularly, to a process and apparatus for opening a crimped synthetic yarn consisting of a number of filaments in which the crimped yarn is relaxed and then subjected to a frictional force to thereby produce a unique opened and crimped yarn.
  • a process for opening of crimped yarn in which a frictional force is applied to the crimped yarn is known for opening of crimped yarn in which a frictional force is applied to the crimped yarn.
  • the yarn obtained is found to be insufi'iciently opened to satisfy high demands on quality, especially-as to bulkiness, crimp contraction and also as to the uniformity.
  • this invention provides a process for the manufacture of opened and crimped yarns which do satisfy the high quality demands.
  • this invention contemplates a process for the opening of a crimped yarn consisting of a number of filaments which comprises passing the crimped yarn through a relaxation zone in which the yarn is not under any significant tension, and then applying a frictional force to the yarn to displace its filaments relative to one another and thereby open the yarn.
  • the yarn immediately before the application of the fric- I tional force, the yarn must be passed through a relaxation zone under substantially no tension in order to obtain high bulkiness and other desirable properties in the opened and crimped yarn.
  • the yarn tension should be lower than 0.05 grams per denier in the relaxation zone and that the degree of relaxation of the yarn should be adjustable to ensure that the yarn is under practically no tension.
  • the relaxation zone of the invention extends advantageously between a rotatable relaxation roller and a friction device, and the peripheral speed of the relaxation roller is higher than the speed of the yarn in the relaxation zone.
  • the improved opening of the yarn according to the invention is obtained because the filaments in the relaxed yarn are virtually free to displace themselves relative to one another. This thus ensures a maximum opening of the yarn.
  • the opened yarn after passing the friction device, is forwarded while under a tension, which may be of the order of at least 0. grams per denier.
  • a preferred process according to the invention is characterized in that the yarn is withdrawn by the rotatable relaxation roller from a knitted fabric, particularly a tubular fabric, which has been subjected to a heat treatment for setting the crimp in the yarn.
  • the frictional force required for opening the crimped yarn may be applied to the yarn by passing the yarn over an edge which is relatively sharp and has a radius of curvature of approximately 0.005 mm., for instance, an agate knife.
  • the opening effect of the frictional force may be intensified if, viewed in its longitudinal direction, the edge is positioned at an angle to the longitudinal direction of the yarn.
  • the frictional force required for opening the yarn may, according to the invention, be applied to the yarn by guiding it at a greater or lesser angle of contact over a nonround pin of ceramic material (e.g., one having a tear droplike configuration).
  • This invention also is concerned with an apparatus for carrying out the heretofore described process.
  • This apparatus includes a feed means for supplying the crimped yarn, a friction device or means for applying a frictional force to the yarn. and a discharge member for removing the crimped and opened yarn from the frictionmeans.
  • the apparatus further is characterized in that the feed means consists of a relaxation roller so that a relaxation zone is formed between the roller and the friction means.
  • This invention is also directed to the yarn manufactured by the aforementioned process.
  • This yarn because of its favorable properties, particularly its high bulkiness, has been successfully processed into various textile products and carpets.
  • FIG. I shows an apparatus of this invention for the opening of a yarn crimped by the knit-set-deknit process
  • FIGS. 2 and 3 show different embodiments of the apparatus of the invention
  • FIG. 4 shows the unopened yarn prior to being treated by the process of this invention.
  • FIG. 5 shows the opened yam produced by the invention.
  • a roll of knitted tube 1 manufactured on a circular knitting machine rests on a support (not shown).
  • the resulting tube 1 had (in a known manner) been subjected to a heat treatment, so that the unraveled and still insufficiently opened yarn 2 shows a permanent crimp and approximately has the appearance shown in FIG. 4.
  • the crimped and unopened yarn 2 is pulled upwards in the direction indicated by the arrow 3, with the knitted tube 1 being unraveled.
  • the unraveling of the knitted tube is effected by the pulling force supplied by the high-speed relaxation roller 4 and over which the yarn is guided through an angle of wrap of about 360.
  • the relaxation roller 4 has a peripheral speed that is considerably higher than the speed of the yarn in the adjacent relaxation zone 5.
  • the yarn is practically without tension.
  • a friction device is formed by the knife edge 6 having a radius of curvature .7 of approximately 0.005 mm.
  • the yarn is passed over the knife edge 6 by means of driven transport rollers 8 and 9. Since in the relaxation zone 5 just before the knife edge 6 the yarn is not under any significant tension, the force to be applied by the transport rollers 8 and 9, which corresponds to the maximum permissible tension for the treated yarn, can be utilized almost entirely for producing the frictional force required for opening the yarn on the knife edge 6.
  • the yarn is fed to the friction device 6 while in the relaxed state, so that the shifting and displacing of the filaments relative to one anotherby friction can take place without the presence of other forces acting on the yarn to prevent the movement of the filaments.
  • the angular contact of the yarn with the relaxation roller 4 and the amount of slippage thereon, are adjustable by displacing in a known manner the two halves of the relaxation roller 4 relative to each other in axial direction, or by changing the speed of the relaxation roller. Correct adjustment will ensure that the yarn in the relaxation zone 5 is practically without any tension.
  • a glass plate 10 Resting on the yarn passing over the knife edge 6 is a glass plate 10 which is, in a known manner, supported by a framework 11. The weight of the glass plate 10 is so chosen that the yarn tension after the knife edge 6 will not exceed the permissible value.
  • the opened and crimped yarn I2 is passed through a thread guide 13 and subsequently wound on to a bobbin 15 to form a package), using a grooved traverse drum I6.
  • the appearance ofth e opened and crimped yarn is shown on an enlarged scale in FIG. 5.
  • FIG. 2 shows a slightly modified embodiment, like elements being referred to by like reference numerals.
  • the primary difference consists in that the friction device is formed by a tensioner "(a known device), in which the yarn is passed between two parts that are pressed together by spring action.
  • FIG. 3 shows another modified embodiment in which the yarn is passed over a friction device formed by a ceramic rod 18 having a nonround, tear droplike cross section.
  • a process for opening of a knit-set-deknit crimped synthetic yarn made up of a number of filaments which comprises withdrawing said crimped yarn from a knitted fabric, passing said crimped yarn once through a relaxation zone in which the yarn is in a relaxed state under a tension lower than about 0.05 grams per denier and immediately thereafter ap-.
  • said relaxation zone extending between relaxation roller means for withdrawing the yarn from said fabric and another means for applying the frictional force to said crimped yarn, the peripheral speed of the relaxation roller means being higher than the speed of the yarn in the relaxation zone to cause the roller means to slip with respect to said yarn and thereby insure that the yarn in said zone is in said relaxed state.

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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)
US750596A 1967-08-12 1968-08-06 Method of opening crimped yarn Expired - Lifetime US3579765A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6711131A NL6711131A (enrdf_load_stackoverflow) 1967-08-12 1967-08-12

Publications (1)

Publication Number Publication Date
US3579765A true US3579765A (en) 1971-05-25

Family

ID=19800945

Family Applications (1)

Application Number Title Priority Date Filing Date
US750596A Expired - Lifetime US3579765A (en) 1967-08-12 1968-08-06 Method of opening crimped yarn

Country Status (6)

Country Link
US (1) US3579765A (enrdf_load_stackoverflow)
DE (1) DE1785114A1 (enrdf_load_stackoverflow)
ES (1) ES357185A1 (enrdf_load_stackoverflow)
FR (1) FR1574635A (enrdf_load_stackoverflow)
GB (1) GB1241568A (enrdf_load_stackoverflow)
NL (1) NL6711131A (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6134757A (en) * 1999-11-18 2000-10-24 Wei; Ho-Pin Processing method for splitting thread spool
US6301937B1 (en) * 1998-12-02 2001-10-16 Globe Manufacturing Corporation Apparatus and method for deknitting yarns
US20050224348A1 (en) * 2004-04-13 2005-10-13 Denso Corporation Structure of gas sensor ensuring gas/liquid tight sealing
US20090020424A1 (en) * 2003-02-10 2009-01-22 Robert Bosch Gmbh Contamination-resistant gas sensor element
US20090101502A1 (en) * 2003-02-10 2009-04-23 Robert Bosch Gmbh Thermal Shock Resistant Gas Sensor Element
US20100264026A1 (en) * 2003-02-10 2010-10-21 Robert Bosch Gmbh Contamination-resistant gas sensor element

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8713810B2 (en) 2011-04-13 2014-05-06 Stanley Black & Decker, Inc. Chalk box
CN112144159B (zh) * 2020-09-15 2022-08-12 张家港市民华塑胶有限公司 一种人造草丝的制备方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3012303A (en) * 1959-12-24 1961-12-12 Whitaker Co Fred Production of multicolored pile fabric
US3078542A (en) * 1959-07-31 1963-02-26 Midland Ross Corp Continuous filament bulked yarn in tow form
US3102322A (en) * 1961-08-14 1963-09-03 Whitaker Co Fred Process of producing crimped yarn for use in house furnishing fabrics
US3220060A (en) * 1964-01-07 1965-11-30 Eastman Kodak Co Apparatus and method for debundlizing filter tow
US3375559A (en) * 1965-08-17 1968-04-02 Textile Machine Works Mechanism for processing multifilament crimped yarn

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3078542A (en) * 1959-07-31 1963-02-26 Midland Ross Corp Continuous filament bulked yarn in tow form
US3012303A (en) * 1959-12-24 1961-12-12 Whitaker Co Fred Production of multicolored pile fabric
US3102322A (en) * 1961-08-14 1963-09-03 Whitaker Co Fred Process of producing crimped yarn for use in house furnishing fabrics
US3220060A (en) * 1964-01-07 1965-11-30 Eastman Kodak Co Apparatus and method for debundlizing filter tow
US3375559A (en) * 1965-08-17 1968-04-02 Textile Machine Works Mechanism for processing multifilament crimped yarn

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6301937B1 (en) * 1998-12-02 2001-10-16 Globe Manufacturing Corporation Apparatus and method for deknitting yarns
US6134757A (en) * 1999-11-18 2000-10-24 Wei; Ho-Pin Processing method for splitting thread spool
US20090020424A1 (en) * 2003-02-10 2009-01-22 Robert Bosch Gmbh Contamination-resistant gas sensor element
US20090101502A1 (en) * 2003-02-10 2009-04-23 Robert Bosch Gmbh Thermal Shock Resistant Gas Sensor Element
US20100264026A1 (en) * 2003-02-10 2010-10-21 Robert Bosch Gmbh Contamination-resistant gas sensor element
US8906214B2 (en) 2003-02-10 2014-12-09 Robert Bosch Gmbh Contamination-resistant gas sensor element
US20050224348A1 (en) * 2004-04-13 2005-10-13 Denso Corporation Structure of gas sensor ensuring gas/liquid tight sealing

Also Published As

Publication number Publication date
ES357185A1 (es) 1970-05-01
FR1574635A (enrdf_load_stackoverflow) 1969-07-11
DE1785114A1 (de) 1972-01-13
NL6711131A (enrdf_load_stackoverflow) 1969-02-14
GB1241568A (en) 1971-08-04

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