US3878697A - Production of bulky and stretchable knitted cord - Google Patents

Production of bulky and stretchable knitted cord Download PDF

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Publication number
US3878697A
US3878697A US344037A US34403773A US3878697A US 3878697 A US3878697 A US 3878697A US 344037 A US344037 A US 344037A US 34403773 A US34403773 A US 34403773A US 3878697 A US3878697 A US 3878697A
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Prior art keywords
tension
yarn
cord
needles
knitting
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Expired - Lifetime
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US344037A
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English (en)
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Masami Tsunekawa
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Individual
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/44—Tensioning devices for individual threads
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B1/22—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes specially adapted for knitting goods of particular configuration
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B9/00—Circular knitting machines with independently-movable needles
    • D04B9/42—Circular knitting machines with independently-movable needles specially adapted for producing goods of particular configuration
    • D04B9/44—Circular knitting machines with independently-movable needles specially adapted for producing goods of particular configuration elongated tubular articles of small diameter, e.g. coverings for cables

Definitions

  • At least one strand of yarn is supplied under tension to the knitting needles of a circular knitting machine and continuously knitted into a tubular knitted cord. which is led under tension away from the needles. these actions being carried out as at least one of the tensions in the supplied yarn and in the cord is abruptly periodically varied or reduced for an instant. This variation in tension can be accomplished by periodically varying either the tension in supplying the yarn and/or the tension with which the cord is drawn away from the needles.
  • the cord is formed with nodules at intervals along its length. the nodules being made of relatively large yarn loops.
  • PE/OP APT PMENTEUAPRZZBYS saw an
  • This invention relates generally to knitting and knitted yarns and more particularly' a method and device for producing bulky, hollow and stretchable knitted cord.
  • Lillian braid has been known as one type of braid. of which an example is disclosed in U.S. Pat. No. 2.656.690 dated Oct. 27. I953 to M. Buxbaum Et Al: knitting device.”
  • This braid is made into a form of braided cord by knitting with maximum knit density by means of a conical-needlecylinder. the circular knitting machine having a plurality of knitting needles. with the object of eliminating stretch and shrinkage or elasticity as much as possible and without rendering the fabric into a hollow structure.
  • Yarns thus produced in accordance with this invention have aesthetically pleasing appearance and texture. resilience. flexibility. soft and clinging feel. porous texture due to loops. and high thermal insulative property.
  • a method of producing yarns as described above which comprises forming a tubular braid or cord by means of a plurality of knitting needles of a circular knitting machine supplied with at least one strand of yarn. at least the tension of the yarn thus supplied or the tension of the cord led away from the needles being periodically reduced or varied. abruptly, for an instant, or both tensions being periodically reduced.
  • an apparatus for producing bulky. hollow and stretchable knitted yarn comprising: a circular knitting machine having means for supplying under tension at least one strand of yarn. a circular knitting mechanism including a plurality of knitting needles and operating to knit said yarn into a tublular knitted braid or cord. and means for conducting under tension the cord thus knitted away from the needles; first and second tension-varying or reducing means optionally operable to vary periodically, abruptly. for an instant the tension in the yarn and in the knitted braid.
  • FIG. 1 is a side elevation showing the essential parts of an exemplary embodiment of a priorart circular knitting machine suitable for use in practicing of this invention
  • FIG. 2 is a vertical section taken along the plane indicated by line ll-lI in FIG. 1 as viewed in the arrow direction;
  • FIG. 3 is a horizontal section taken along the plane indicated by line lIIIII in FIG. 1 as viewed in the arrow direction;
  • FIG. 4A is a side elevation showing one example of a device for adjusting the tension of the yarn being supplied:
  • FIG. 4B is a side elevation showing a known adjusting device. similar to the device shown in FIG. 4A;
  • FIG. 5 is a side elevation showing a modified example of a device for adjusting the tension of the cord knitted yarn
  • FIG. 6 is a front elevation orthogonal to the side elevation of FIG. 5;
  • FIG. 7 is an enlarged. fragmentary view showing a plain knitted structure
  • FIG. 8 is an enlarged view in the longitudinal direction of a part of a bulky. hollow knitting yarn braided in accordance with this invention:
  • FIG. 9 is a fragmentary perspective view of the knitting yarn shown in FIG. 8;
  • FIG. 10 is a view similar to FIG. 8. showing an example of modification of the knitted yarn.
  • FIG. 11. is a side view of the modified bulky yarn.
  • the knitting mechanism of a circular knitting machine illustrated therein. and generally designated by reference character N for producing bulky. hollow knitting yarn. has a stationary base plate 3 on which the principal operational parts of the knitting mechanism are supported.
  • a pulley 5 is rotatably supported on the base plate 3 to be rotated continuously about a vertical axis by power transmitted from motive power means (not shown) through an endless belt 4. This pulley 5 is supported through a support part 6 by the base plate 3.
  • a rotary cylinder 7 is rigidly and coaxially fixed to the pulley 5 and is unitarily rotatable therewith.
  • a cylindrical cam 8 fitted in the rotary cylinder 7 comprises an upper section 8a and a lower section 8b. which are fixed to the rotary cylinder 7 by screws 9a and 9b as shown in FIG. 2. These screws 9a and 9b pass through vertical slots 7a and 7!; formed in the rotary cylinder 7. Accordingly. the upper and lower cam sections 8a and 8b can be adjusted in their vertical positions by loosening the screws 9a and 9b. adjustably moving the sections 8a and 8b vertically, and retightening the screws 9a and 9b.
  • latch needles 11 are slidably fitted butts 11a of four latch needles 11.
  • latch needles 11 have respective hooks Ilb and latches llc at their upper ends in the conventional manner and are held and guided vertically in the following manner.
  • the stems of these latch needles 11 are slidably inserted through vertical guide grooves 12a formed in a latch needle supporting member 12 as shown in FIGS. I and 3.
  • This latch needle supporting member 12 is secured to and held on the stationary base plate 3 indirectly by a member 13 extending vertically within the cam 8 as shown in FIG. 2. Accordingly. even when the rotary cylinder 7 and the cylindrical cam 8 rotate about their axis, the supporting member 12 and the latch needles supported thereon do not rotate. and the cam grooves I of the cylindrical cam 8 impart a cam action to the butts Ila sliding therein. whereby the four latch needles II successively undergo repeated up-and-down reciprocation thereby to carry out the knitting of a yarn Y supplied to the knitting mechanism as indicated in FIG. 1.
  • the yarn Y is continuously supplied through a hole 140 in a yarn guide 14 supported to rotate together with the aforementioned pulley to the knitting mechanism described above. where the yarn Y is continuously knitted by the latch needles 11 into a knitted yarn or cord B of tubular form. which then passes through the interior hollow space of the cylindrical cam 8 and through a passageway (not shown) in the interior of the base plate 3 and is then taken out downward as indicated in FIG. 1.
  • the yarn Y Prior to its being supplied to the circular knitting mechanism N shown in FIG. I, the yarn Y is unwound from a yarn supplying bobbin 15 as shown in FIG. 4A and then passed through a supply yarn tension adjusting device T, as shown in FIG. 4A. for example.
  • This device T has a central bolt 17 having an enlargeddiameter shank with a hole 16 for yarn passage. a bolt head 18 at the lower end. and a nut 19 in screw engagement with the threaded upper end.
  • This supply tension is periodically variable by a rotating member 24 driven in rotation about a vertical axis by a motor M and having a laterally extending arm 24a adapted to enter at its outer extremity between the upper and lower clamping plates 20 and 21.
  • this arm 24a periodically forces itself between the two clamping plates, the upper plate 20 is lifted against the force of the spring 22 and separates from the lower plate 21 as shown in FIG. 4A. Consequently, the yarn tension is periodically and abruptly reduced for an instant.
  • the yarn supply with the rotation of the rotating member 24.
  • the bulky hollow yarn B is taken out from the knitting mechanism N by a positive take-up roller device T comprising, essentially. a pair of upper and lower rollers 27 and 28.
  • the yarn knitted by the inventive machine is bulky because the knit cord itself is hollow. It will be understood that a hollow cord is necessarily more bulky than a single yarn. Moreover, the knit cord according to the present invention naturally affords bulkiness since it is formed with nodules at intervals. as will be explained in more detail.
  • the lower roller 28 is fixed and has a shaft 28a which is supported to move only in rotation,
  • the braided yarn B is passed between upper and lower rollers 32 and 33.
  • the lower roller 33 is stationary, while the upper roller 32 is urged by the force of gravity toward the lower roller 33.
  • the knitting mechanism and related mechanisms of the above described organization according to the invention operates in the following manner.
  • the yarn Y supplied from the yarn supplying bobbin 15. through the tension adjusting device T,, and toward the knitting mechanism N. is caused by the revolving yarn guide 14 to be fed as it revolves around the latch needles II. Since the latch needles 1] are moving successively up and down at the same time as a result of the action of the cam 8, they operate in the known manner to knit a hollow. knitted yarn B of Lillian form. as defined earlier. having a plain knit texture.
  • FIG. 10 illustrates an example of a bulky. hollow yarn wherein two large loops Y! in opposed positions and two small loops Ys in opposed positions are formed.
  • This knit. shape can be obtained by suitable timing of the variation of the supply yarn tension and the movements of the needles 11, the loops YI being formed by smallergauge needles and the loops Ys by larger-gauge needles.
  • FIG. ll An example of a knitted yarn is illustrated in FIG. ll wherein bulky yarn parts made up of large loops Y1 and bulky yarn parts made up of small loops Ys are alternately disposed along the yarn and respectively occupy certain lengths of the yarn.
  • This configuration can be obtained by causing the period of the yarn tension variation on the supply yarn side or the drawing out side to be considerably long with respect to all parts.
  • the yarn thus adjusted in tension was supplied to the knitting needles. by which the yarn was knitted into a linear shape ofa row of four loops in hollow cylindrical formation, the latches being opened and closed by the already formed loops as new loops were successively formed.
  • a tension comprising the knit material tension and the take-up tension in a well-balanced state was applied to the already knit loops thereby to pull the same. and continuous knitting was carried out with the knitting action maintained in a smooth state, whereby a bulky, hollow knitted braid was produced.
  • Tex. a strength of 6 K. 900 g.. an elongation of 21.2 percent. and an average bulkiness of 7.3 cm/ g. was obtained.
  • latch needles for 5- inch gauge and for 8-inch gauge were to make large and small loops in the yarn. thereby to form concavities and convexities on the lateral surface of the braided yarn whereby. with the same starting material.
  • a bulky braided yarn having much greater variation in bulkiness can be obtained than a bulky yarn of uniform loops knitted by the same knitting needles. and having large and small loops of aesthetically pleasing appearance. texture and resilience.
  • FIG. 10 A bulky. hollow braided yarn produced by this procedure is illustrated in FIG. 10.
  • a cylindrical-type. circular knitting machine having a device for varying the yarn supply speed and/or the supply yarn tension.
  • a cotton-fiber No. 20 two-folded yarn was pulled out from a supply package and supplied to the knitting needles with settings of the supply yarn tension and the take-up tension selected to facilitate knitting.
  • at a knitting speed of 4 meters/min. as the yarn supplying speed was caused to fluctuate continuously and intermittently with a ratio of 1.00 1.1 l. at intervals of 0.65 second. thereby to knit a bulky braided yarn of tubular form.
  • An apparatus for producing bulky. hollow knitted cord comprising: a circular knitting machine having means for supplying under a tension at least one strand of yarn. a circular knitting mechanism including a plurality of knitting needles and operating to knit the yarn into a tubular knitted cord and means for conducting the latter away from said needles under tension; a first tension-varying device optionally operable to vary periodically the tension in the yarn being supplied; and a second tension-varying device optionally operable to vary periodically the tension in the cord being conducted away from said needles. wherein said second tension-varying device includes a lower driving roller having spacing members forming therebetween a path for conducting the cord.
  • an upper driven roller resting on said lower roller so as to be movable away therefrom and operative to clamp the cord between said rollers to apply a tension to the cord.
  • said upper roller being moved away from said lower roller and caused to rest on said members to decrease the tension of the cord when said members are brought between said rollers as said lower roller rotates.
  • a method of producing a bulky and stretchable knitted cord comprising the steps of supplying at least one strand of yarn under tension to a plurality of knitting needles ofa circular knitting machine. knitting the yarn into a tubular knitted cord by means of the needles. and conducting the cord away from the needles under tension: the improvement comprising the step of reducing the said tensions abruptly, for an instant. in a periodic manner. both in the yarn being supplied and in the cord being conducted away. in such a timed relationship with said knitting step that the knit cord is formed with nodules at intervals along its length, the nodules being made up of relatively large yarn loops.
  • an apparatus for producing a bulky and stretchable knitted cord comprising means for supplying under tension at least one strand of yarn. a circular knitting mechanism including a plurality of knitting needles and operating to knit the supplied yarn into a tubular knitted cord, and means for conducting the latter away from said needles under tension: the improvement comprising first tension reducing means acting on the yarn being supplied. second tension reducing means acting on the cord being conducted away from said needles. and means for operating said tension reducing means in such a manner that the respective tensions are reduced abruptly. for an instant. in a periodic manner. in such a timed relationship with the operation of said needles that the knitted cord is formed with nodules at intervals along its length. the nodules being made up of relatively large yarn loops.
  • said first tension reducing means includes a pair of clamping plates for resiliently clamping therebetween the yarn being supplied. and a member periodically entering between said plates to separate them so as to reduce the yarn tension.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Knitting Of Fabric (AREA)
US344037A 1972-03-28 1973-03-22 Production of bulky and stretchable knitted cord Expired - Lifetime US3878697A (en)

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JP47031073A JPS5214775B2 (enrdf_load_stackoverflow) 1972-03-28 1972-03-28

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JP (1) JPS5214775B2 (enrdf_load_stackoverflow)
GB (1) GB1429533A (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2426102A1 (fr) * 1978-05-17 1979-12-14 Fannyfil Spa File de fantaisie pour la fabrication d'articles tisses et tricotes
US4209881A (en) * 1978-03-21 1980-07-01 Phillips Petroleum Company Knitting intermittently drawn yarns
EP0743385A3 (en) * 1995-05-19 1998-07-01 Shima Seiki Manufacturing, Ltd. Apparel production apparatus and method
WO1999045184A1 (en) * 1998-03-06 1999-09-10 Wools Of New Zealand Limited A method and apparatus for producing a yarn structure of improved properties
US12276052B2 (en) 2021-12-22 2025-04-15 Nike, Inc. Tensioning device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9324759D0 (en) * 1993-12-02 1994-01-19 Curry Roger F N A circular knitting machine
KR100592098B1 (ko) 2004-02-11 2006-06-22 삼성광주전자 주식회사 진공청소기의 사이클론 집진장치

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1518378A (en) * 1923-02-07 1924-12-09 William C Adams Knitting machine
US1947958A (en) * 1930-06-16 1934-02-20 Celanese Corp Knitting machine
US2078050A (en) * 1934-03-24 1937-04-20 Julius Kayser & Co Warp knitted fabric and method and apparatus for making same
US2213720A (en) * 1936-12-15 1940-09-03 Theodor Lowenberg Production of looped textile threads and yarns
US2264069A (en) * 1939-01-16 1941-11-25 Hemphill Co Stocking top and method of knitting same
US2656690A (en) * 1952-03-08 1953-10-27 Buxbaum Mac Knitting device
US2856764A (en) * 1955-02-21 1958-10-21 Acme Hosiery Mills Inc Article length controlled tension apparatus for knitting machines and method
US3442100A (en) * 1966-03-26 1969-05-06 Bentley Eng Co Ltd Fabric drawoff from knitting machines
US3448594A (en) * 1967-01-13 1969-06-10 Burlington Industries Inc Automatic separator for separating articles from tubular fabrics
US3511062A (en) * 1966-03-22 1970-05-12 Federico Sanfeliu Nogues Method of knitting tubular articles
US3635052A (en) * 1969-04-19 1972-01-18 Plasmeca Jean Piemontesi & Cie Device for tensioning the thread on a textile machine

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1518378A (en) * 1923-02-07 1924-12-09 William C Adams Knitting machine
US1947958A (en) * 1930-06-16 1934-02-20 Celanese Corp Knitting machine
US2078050A (en) * 1934-03-24 1937-04-20 Julius Kayser & Co Warp knitted fabric and method and apparatus for making same
US2213720A (en) * 1936-12-15 1940-09-03 Theodor Lowenberg Production of looped textile threads and yarns
US2264069A (en) * 1939-01-16 1941-11-25 Hemphill Co Stocking top and method of knitting same
US2656690A (en) * 1952-03-08 1953-10-27 Buxbaum Mac Knitting device
US2856764A (en) * 1955-02-21 1958-10-21 Acme Hosiery Mills Inc Article length controlled tension apparatus for knitting machines and method
US3511062A (en) * 1966-03-22 1970-05-12 Federico Sanfeliu Nogues Method of knitting tubular articles
US3442100A (en) * 1966-03-26 1969-05-06 Bentley Eng Co Ltd Fabric drawoff from knitting machines
US3448594A (en) * 1967-01-13 1969-06-10 Burlington Industries Inc Automatic separator for separating articles from tubular fabrics
US3635052A (en) * 1969-04-19 1972-01-18 Plasmeca Jean Piemontesi & Cie Device for tensioning the thread on a textile machine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4209881A (en) * 1978-03-21 1980-07-01 Phillips Petroleum Company Knitting intermittently drawn yarns
FR2426102A1 (fr) * 1978-05-17 1979-12-14 Fannyfil Spa File de fantaisie pour la fabrication d'articles tisses et tricotes
EP0743385A3 (en) * 1995-05-19 1998-07-01 Shima Seiki Manufacturing, Ltd. Apparel production apparatus and method
EP1148162A3 (en) * 1995-05-19 2002-04-03 Shima Seiki Manufacturing Limited Apparel production method and apparatus
WO1999045184A1 (en) * 1998-03-06 1999-09-10 Wools Of New Zealand Limited A method and apparatus for producing a yarn structure of improved properties
US12276052B2 (en) 2021-12-22 2025-04-15 Nike, Inc. Tensioning device

Also Published As

Publication number Publication date
JPS4898144A (enrdf_load_stackoverflow) 1973-12-13
GB1429533A (en) 1976-03-24
JPS5214775B2 (enrdf_load_stackoverflow) 1977-04-23

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