US3099143A - Elastic yarn feeder for knitting machines - Google Patents

Elastic yarn feeder for knitting machines Download PDF

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Publication number
US3099143A
US3099143A US102728A US10272861A US3099143A US 3099143 A US3099143 A US 3099143A US 102728 A US102728 A US 102728A US 10272861 A US10272861 A US 10272861A US 3099143 A US3099143 A US 3099143A
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United States
Prior art keywords
elastic yarn
yarn
feeding
feeder
needles
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Expired - Lifetime
Application number
US102728A
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English (en)
Inventor
George E Sinclair
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Scott and Williams Inc
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Scott and Williams Inc
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Publication date
Application filed by Scott and Williams Inc filed Critical Scott and Williams Inc
Priority to US102728A priority Critical patent/US3099143A/en
Priority to GB10699/62A priority patent/GB946889A/en
Priority to DES78824A priority patent/DE1230960B/de
Priority to BE616143A priority patent/BE616143A/fr
Application granted granted Critical
Publication of US3099143A publication Critical patent/US3099143A/en
Anticipated expiration legal-status Critical
Assigned to SCOTT & WILLIAMS INCORPORATED reassignment SCOTT & WILLIAMS INCORPORATED ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SCOTT & WILLIAMS INC.
Expired - Lifetime legal-status Critical Current

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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
    • D04B15/48—Thread-feeding devices

Definitions

  • This invention relates to elastic yarn feeders for knitting machines and has particular reference to a feeder for bare elastic yarns such as the synthetic elastomeric yarns known as spandex yarns.
  • the invention is applicable to elastic yarns generally including those of natural and synthetic rubber.
  • spandex yarns Since their introduction spandex yarns have found particular application in the knitting of hosiery since they have an affinity for dyes and exceptional elasticity m ing them usable in the tops or cuffs of hosiery or in the leg or other portions thereof, wherein they are incorporated in various fashions by knitting, inlaying, interlacing or the like.
  • the yarn as used is desirably bare, feeding difficulties are encountered as compared with the heretofore used covered rubber.
  • positive feed is desirable so that for a given progress of the knitting a definite length of the yarn in stretched condition is introduced into the fabric, which length may vary from point to point of the product.
  • the general object of the present invention involves the attainment of the last mentioned conditions. In view of continuous high speed operation of the knitting machine rapid corrective actions are required, and these are achieved in accordance with the invention.
  • FIGURE 1 is a plan view illustrating an elastic yarn feeding attachment in association with a knitting machine which is outlined only to the extent required for understanding of the invention
  • FIGURE 2 is a vertical section taken on the plane indicated at 2-2 in FIGURE 1;
  • FIGURE 3 is a side elevation looking from the right hand side of FIGURE 1 showing the feeding attachment in its low speed feeding position such as is assumed during normal knitting;
  • FIGURE 4 is a view similar to FIGURE 3 but showing the attachment in the condition assumed during momentary high speed feed when tension on the elastic yarn is to be relieved;
  • FIGURE 5 is a fragmentary vertical section taken on the plane indicated at 5-5 in FlGURE 4;
  • FIGURE 6 is a fragmentary view showing certain controlling parts :as they would appear from the plane 6-6 in FIGURE 1;
  • FIGURE 7 is a diagram illustrating certain electrical, pneumatic and mechanical connections involved in control.
  • FIGURE 1 there is indicated by way of illustration at 2 a knitting machine of the conventional superposed cylinder type, this machine being illustrated primarily because it involves more elaborate procedures in introducing and removing an elastic yarn making particularly desirable the use of the present invention.
  • This machine is shown herein only in outline, since it is basically unchanged in carrying out the present invention, the circle of needles being indicated at 4, an elastic yarn feeding finger at s and the usual clamping and cutting means at 8. Reference to some of the other mechanisms of this machine will be made hereafter.
  • the bare elastic yarn is indicated at E, and approaches the mechanism at E being derived from a conventional cone or other package. in its approach to the yarn feeding finger it passes through a guiding eye 10, thence about the capstan-type feeder l2, and through guiding eyes 1 :and 16, the latter being carried by the feeding finger a.
  • the feeding capstan 12 which will be more fully described hereafter, is of the type illustrated and described in Lawson Patent 2,627,738, except that in accordance with the invention it is associated with special driving control means.
  • Power for operation of the feeding attachment is derived from a continuously rotating gear (not shown) of the knitting machine through the spur gears 18 and 2t) and bevel gears 22 and 24 which effect continuous rotation of a shaft 26 to which is secured a horizontal driving disc 23 which rotates counterclockwise as viewed in plan.
  • Engageable with the disc 28 is a rubber tire 3%) of a wheel 32 secured to a shaft 34- which is mounted in a bearing 1%. Secured to the housing of this bearing 36 by means of screws 4% there is a stationary gear 3% with which there mesh pinions 42 mounted on shafts 44 which have bearings in a carrier 46 which is carried by the shaft .34, being secured thereto by a set screw at 48.
  • the shafts 44 respectively carry the horizontally projecting screws 50, the assembly of which constitute the capstan 12-.
  • the feed of the elastic yarn is effected at a desired rate of length thereof by the capstan in the fashion described in said Lawson patent.
  • the elastic yarn E passes from the feeding eye It! a plurality of times about the screws and then through the eye 14. in starting up operation the elastic yarn may be rather arbitrarily placed about the screws, the number of turns about the screw assemblage being relatively immaterial so long as the yarn is wound several times thereabout.
  • feed proceeds a stabilized feeding distribution of the elastic yarn about and with respect to the screws is automatically achieved and feed takes place at a quite uniform rate with respect to the progress of the knitting.
  • the rate of advance of the relatively untensioned yarn passing through the eye 10 is substantially lower than the linear rate of movement in passing through the feeding finger 6, the result being that the yarn is elongated to an extent depending upon the relative rates of movement of the capstan and the needles of the knitting machine.
  • the normal feeding condition is as illustrated in FIGURE 3, with the tire 30 of the wheel 32 being at a relatively small radius from the axis of the disc 28.
  • Bearings 52 and 54 are provided in a bracket 56 which is secured to the machine frame. These bearings mount a rod 58 for both axially sliding movement and angular movement. Adjustably secured to the rod 58 is a lever 60, the hub 62 of which is secured to the red by means of a set screw 64. The bearing 36 forms part of a horizontally extending arm 66 of this lever 60, with the result that the assembly associated with shaft 34 will move axially with the axial movements of the rod 58 and angularly about the axis of this rod.
  • the lever 60 is also provided with an upper portion 68 in which there is secured to extend laterally an elongated pin 70 engageable by a lever 72 pivoted to the frame at 74 and connected at its upper end to a Bowden wire 76 which is guided through a fixed bracket 78 which clamps its sheath.
  • a Bowden wire 76 which is guided through a fixed bracket 78 which clamps its sheath.
  • Engageable with the collar 86 is a downwardly extending arm of a bell crank 88 which is pivoted to the frame 9d and at 92 is engaged by the upper end of a Bowden wire 94 provided with a fixed guiding sheath 96.
  • a downward pull on the Bowden wire will result in movement of the rod 58 to the right as viewed in FIGURE 4, resulting in positioning of the tire 30 at a greater radius from the center of the disc 28.
  • the conventional main pattern chain of the knitting machine is shown at 98, and in accordance with the invention is provided with one or more links having side lugs 100 engageable with a moving element of a switch 102 to close a circuit which is diagrammed in FIGURE 7.
  • the switch is in series with the low voltage secondary of a transformer 184 which is continuously energized from the main power line 196.
  • the solenoid 108 of an air valve 110 which is opened when the solenoid is energized to provide air from -a pressure supply line 112 to a cylinder 114- containing a piston rod 116 which is arranged to act on a lever 118 to exert a pull on the Bowden wire 94.
  • the Bowden wire is pulled when the switch 102 is closed by a lug 100.
  • FIGURE 1 and FIG- URE 6 show the portions 12% of the conventional yarn changing mechanism of the knitting machine which are involved in the operation of the feeding means herein. Slight modifications and additions are here involved.
  • a lever 12'2 mounted on a fixed pivot at 124 is connected to the Bowden wire 76, previously described, and is provided with a pin 126 arranged to be lifted by cams 128 and 130 on a ring 132 which is adjustably mounted on a convention-a1 yarn finger control unit, as for example, by bolts passing through arcuate slots on the ring.
  • the control unit as more fully described in said Bently et al. patent comprises the yarn finger control cams 134, rack wheel 136, and clamp and cutter operating cams 138, this assembly being advanced as desired by the racking pawl 140 controlled in the usual fashion from the main chain 98.
  • chain 98 When the elastic yarn is to be removed from action, chain 98 will advance lug 180 to close the switch 102, energizing the solenoid 188 and opening the valve to supply air to raise the piston 116, thereby rocking the lever 118 to exert a pull on the Bowden wire 94.
  • This action rocks the bell crank 88 to shift the rod 58 and its associated parts to the position illustrated in FIGURE 4, locating the tire 38 at an increased radial distance from the center of the disc 28.
  • the result is an immediate increase in rate of rotation of shaft 34 and a sudden increase in the rate of feed of the elastic yarn resulting in relief of tension therein in the portion between the capstan feeder and the yarn finger 6.
  • the pawl 140 of the elastic yarn changer advances the rack wheel 136 to effect yarn removal in the usual fashion with attendant clamping and cutting of the elastic yarn, the end of which is located in the conventional clamp indicated at 8.
  • the cam for example 128, engages the pin 126 to rock lever 122 applying a pull on the Bowden wire 76 which rocks the lever 72 moving pin 70 to rock the lever 68 and thus disengage the tire 30 from the disc 23 to interrupt the feed of the elastic yarn.
  • rod 58 is shown as occupying a fixed axial position determined by collar 86 during knitting, it will be evident that it may be controlled variably by the pattern mechanism so that during knitting the extension of the elastic yarn E may be varied either continuously or in steps to provide fashioning or shaping of the product being made.
  • a feeder of positive feeding type for supplying yarn at predetermined feed rate to said feeding means and needles during activity of the feeding means and means for increasing the yarn supplying rate of said feeder at the time ⁇ of withdrawal of said elastic yarn, thereby to decrease the tension of the portion of the yarn between the feeder and said elastic yarn feeding means.
  • a knitting machine having needles, means for feeding an elastic yarn to the needles, means for moving said feeding means to insert and withdraw said el-astic yarn, and clamping and cutting means for the elastic yarn; a feeder of positive feeding type for supplying yarn at predetermined feed rate to said feeding means and needles during activity of the feeding means, means for increasing the yarn supplying rate of said feeder at the time of withdrawal of said elastic yarn, thereby to decrease the tension of the portion of the yarn between the feeder and said elastic yarn feeding means, and means for interrupting the supply of said elastic yarn by said feeder following the increase of yarn supply rate.
  • a feeder of positive feeding type for supplying yarn at predetermined feed rate to said feeding means and needles during activity of the feeding means, means for increasing the yarn supplying rate of said feeder at the time of withdrawal of said elastic yarn, thereby to decrease the tension of the portion of the yarn between the feeder and said elastic yarn feeding means, means for interrupting the supply of said elastic yarn by said feeder following the increase of yarn supply rate, and means for restoring said feeder to condition for lower rate of supply of said elastic yarn during the time of interruption of the supply of said elastic yarn.
  • a feeder of positive feeding capstan type for supplying yarn at predetermined feed rate to said feeding means and needles during activity of the feeding means and means for increasing the yarn supplying rate of said feeder at the time of withdrawal of said elastic yarn, thereby to decrease the tension of the portion of the yarn between the feeder and said elastic yarn feeding means.
  • a feeder of positive feeding capstan type for supplying yarn at predetermined feed rate to said feeding means and needles during activity of the feeding means, means for increasing the yarn supplying rate of said feeder rat the time of withdrawal of said elastic yarn,
  • a feeder of positive feeding capstan type for supplying yarn at predetermined feed rate to said feeding means and needles during activity of the feeding means, means for increasing the yarn supplying rate of said feeder at the time of Withdrawal of said elastic yarn, thereby to decrease the tension of the portion of the yarn between the feeder and said elastic yarn feeding means, means for interrupting the supply of said elastic yarn by said feeder following the increase of yarn supply rate, and means for restoring said feeder to condition for lower rate of supply of said elastic yarn during the time of interruption of the supply of said elastic yarn.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
US102728A 1961-04-13 1961-04-13 Elastic yarn feeder for knitting machines Expired - Lifetime US3099143A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US102728A US3099143A (en) 1961-04-13 1961-04-13 Elastic yarn feeder for knitting machines
GB10699/62A GB946889A (en) 1961-04-13 1962-03-20 Improvements in or relating to elastic yarn feeders for knitting machines
DES78824A DE1230960B (de) 1961-04-13 1962-04-03 Liefervorrichtung an Rundstrickmaschinen
BE616143A BE616143A (fr) 1961-04-13 1962-04-06 Perfectionnements aux machines à tricoter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US102728A US3099143A (en) 1961-04-13 1961-04-13 Elastic yarn feeder for knitting machines

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US3099143A true US3099143A (en) 1963-07-30

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US102728A Expired - Lifetime US3099143A (en) 1961-04-13 1961-04-13 Elastic yarn feeder for knitting machines

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US (1) US3099143A (fr)
BE (1) BE616143A (fr)
DE (1) DE1230960B (fr)
GB (1) GB946889A (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3161032A (en) * 1964-12-15 H lawson
US3184820A (en) * 1963-04-29 1965-05-25 Maurice S Kanbar Apparatus for orienting the structure of synthetic yarn
US3209558A (en) * 1963-12-03 1965-10-05 Kendall & Co Yarn furnishing device
US3263454A (en) * 1966-08-02 Method and apparatus for knitting
US3392553A (en) * 1965-03-30 1968-07-16 Burlington Industries Inc Stay-up stocking
US3451603A (en) * 1965-05-18 1969-06-24 Inst Textile De France Method and device for adjusting the tension of yarn fed to a yarn-consuming machine
US3687384A (en) * 1969-04-11 1972-08-29 Rosen Karl I J Thread delivery and storage device
WO2001094247A3 (fr) * 2000-06-08 2002-06-06 Du Pont Dispositif et procede d'apport de fil

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114086307B (zh) * 2021-11-25 2023-08-22 绍兴汇艺针织有限公司 一种双面针织装置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1600464A (en) * 1926-09-21 Feed control for knitting machines
US1606756A (en) * 1926-11-09 Elastic yarn-feeding means fob
US2053877A (en) * 1933-01-09 1936-09-08 Narrow Fabric Company Means for producing warp knit fabrics
US2087820A (en) * 1935-12-11 1937-07-20 Scott & Williams Inc Machine for knitting fabric with rubber inlay
US2110088A (en) * 1934-12-31 1938-03-01 Hemphill Co Yarn furnishing device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2627738A (en) * 1953-02-10 Elastic yarn feeding means for
DE884545C (de) * 1949-10-29 1953-07-27 Bentley Eng Co Ltd Garnzufuehrungsvorrichtung fuer Textilmaschinen, insbesondere Rundstrickmaschinen
DE862334C (de) * 1951-07-17 1953-01-08 Keller & Knappich Ges Mit Besc Apparat zum Zuliefern elastischer Faeden an Wirk- und Strickmaschinen
DE1074810B (de) * 1953-05-20 1960-02-04 Paul Virchaux, Samt-Blaise (Schweiz) Fa denliefervomchtung fur Strickmaschinen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1600464A (en) * 1926-09-21 Feed control for knitting machines
US1606756A (en) * 1926-11-09 Elastic yarn-feeding means fob
US2053877A (en) * 1933-01-09 1936-09-08 Narrow Fabric Company Means for producing warp knit fabrics
US2110088A (en) * 1934-12-31 1938-03-01 Hemphill Co Yarn furnishing device
US2087820A (en) * 1935-12-11 1937-07-20 Scott & Williams Inc Machine for knitting fabric with rubber inlay

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3161032A (en) * 1964-12-15 H lawson
US3263454A (en) * 1966-08-02 Method and apparatus for knitting
US3184820A (en) * 1963-04-29 1965-05-25 Maurice S Kanbar Apparatus for orienting the structure of synthetic yarn
US3209558A (en) * 1963-12-03 1965-10-05 Kendall & Co Yarn furnishing device
US3392553A (en) * 1965-03-30 1968-07-16 Burlington Industries Inc Stay-up stocking
US3451603A (en) * 1965-05-18 1969-06-24 Inst Textile De France Method and device for adjusting the tension of yarn fed to a yarn-consuming machine
US3687384A (en) * 1969-04-11 1972-08-29 Rosen Karl I J Thread delivery and storage device
WO2001094247A3 (fr) * 2000-06-08 2002-06-06 Du Pont Dispositif et procede d'apport de fil

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Publication number Publication date
DE1230960B (de) 1966-12-22
GB946889A (en) 1964-01-15
BE616143A (fr) 1962-10-08

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